EP1045746B1 - Automatic cutting of pieces in a sheet material - Google Patents

Automatic cutting of pieces in a sheet material Download PDF

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Publication number
EP1045746B1
EP1045746B1 EP99942987A EP99942987A EP1045746B1 EP 1045746 B1 EP1045746 B1 EP 1045746B1 EP 99942987 A EP99942987 A EP 99942987A EP 99942987 A EP99942987 A EP 99942987A EP 1045746 B1 EP1045746 B1 EP 1045746B1
Authority
EP
European Patent Office
Prior art keywords
cutting
film
sheet material
sealing film
installation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99942987A
Other languages
German (de)
French (fr)
Other versions
EP1045746A1 (en
Inventor
Didier Chabirand Garconnet
Thierry Badie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lectra SA
Original Assignee
Lectra SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lectra SA filed Critical Lectra SA
Publication of EP1045746A1 publication Critical patent/EP1045746A1/en
Application granted granted Critical
Publication of EP1045746B1 publication Critical patent/EP1045746B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/018—Holding the work by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1054—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing and simultaneously bonding [e.g., cut-seaming]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1084—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing of continuous or running length bonded web
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1317—Means feeding plural workpieces to be joined
    • Y10T156/1343—Cutting indefinite length web after assembly with discrete article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1348—Work traversing type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1378—Cutter actuated by or secured to bonding element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1788—Work traversing type and/or means applying work to wall or static structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0448—With subsequent handling [i.e., of product]
    • Y10T83/0467—By separating products from each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2066—By fluid current
    • Y10T83/207—By suction means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2074—Including means to divert one portion of product from another
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2183—Product mover including gripper means
    • Y10T83/2185—Suction gripper

Definitions

  • the invention relates to a method and an installation for cutting. automatic of pieces of predetermined shapes in a material in sheet according to the respective preambles of claims 1 and 25 (see DE-A-4344814).
  • a particular field of application of the invention is cutting automatic of pieces in plies of textile material, in particular in the clothing industry.
  • the invention is also applicable to cutting of technical textiles in industrial applications, and cutting non-woven materials, such as leather.
  • a well-known process see DE-A-4344814 for cutting parts in a flexible sheet material consists of bringing the sheet material onto a table in a cutting area, either in a single ply or in several plies superimposed forming a mattress, and cutting pieces in accordance to a predetermined placement by means of a tool which penetrates the material while the sheet material is held on the table by vacuum, with application of a flexible sealing film on the surface of the material in sheet.
  • the depression is obtained by suction through the surface of Table.
  • the tool is a knife animated by a vertical vibratory movement or a circular blade whose displacement relative to the table is ordered to cut the pieces having the desired shapes, and to locations on the surface of the sheet material defined by the preset placement. Tool not only cuts sheet material but also the sealing film applied to it.
  • Downstream of the cutting area is an area of unloading where the pieces cut from the material are recovered in sheet.
  • Each piece cut from a single fold, or each stack of pieces (or "log") cut from a mattress is surmounted by a part of the same shape cut from the sealing film.
  • the pieces or cut logs possibly always fitted with the film part corresponding seal on which can be worn identification information, are taken from the unloading area to be directed or temporarily stored for use higher.
  • the invention aims to remedy the difficulties mentioned above and, according to one of its aspects, proposes for this purpose an automatic cutting process of sheet material of the type comprising the supply of at least one ply of material in sheet on a table in a cutting area, holding the sheet material on the table by vacuum, applying a sealing film to the surface of the sheet material, cutting pieces of predetermined shapes at by means of a tool passing through the sealing film and the sheet material, and the removal of cut pieces downstream of the table, process in which at least the skeleton of the sealing film is deflected from the path of the sheet material in a downstream end region of the table to be recovered automatically, separately from the cut pieces.
  • At least the skeleton of the sealing film is recovered by automatic rewinding.
  • the rewinding can be performed by call on a chuck at a speed tangential slaved to the speed of movement of the sheet material on the table.
  • the cutting of the parts is carried out in maintaining the integrity of the skeleton, so that it can be recovered automatically continuously. If applicable, the integrity of the skeleton could be restored by depositing attachments, for example located on the surface of the sealing film.
  • the skeleton of the sealing film is absent from the area of unloading, reducing the size thereof.
  • the skeleton of the sealing film is evacuated and recovered with at least some of the cut parts of the film.
  • the connection between the cut part of the sealing film and the skeleton can be restored by means of fasteners deposited or formed on the film locally or continuously along the cutting lines.
  • fasteners deposited or formed on the film locally or continuously along the cutting lines.
  • fragments of the film sealing formed by the skeleton and cut parts of the film with the parts are withdrawn by suction from the material path in sheet then evacuated.
  • the film fragments are removed by means of a movable member adjacent to the path of the sheet material.
  • the movable member is rotated by contact with the sheet material and advance thereof.
  • the organ mobile can be rotated by means of a device possibly disengageable, associated with an independent motorization or moved in synchronism with means for moving the material in leaf on the table.
  • a rotary movable member comprising several sectors, and a depression is established in each sector during its movement between the proximity of the path of the sheet material and an area for removing fragments of movie. Overpressure can then be established in each sector when it enters the evacuation zone.
  • the film fragments can be removed by deposit in a receptacle located above the path of the sheet material and extraction from the receptacle or by being brought to a discharge pipe.
  • it relates to a automatic cutting equipment for sheet material allowing the setting using the above method.
  • an installation of the type comprising a cutting table, a loading station for cutting sheet material at an upstream end of the cutting table, an unloading station pieces cut at a downstream end of the cutting table, means of establishing a depression on the surface of the table cutting, and means for supplying a flexible sealing film to the near the upstream end of the cutting table, installation in which means are further provided for separate at least one skeleton of sealing film in the vicinity of the downstream end of the cutting table and to retrieve it automatically outside the unloading station for cut pieces.
  • the installation comprises means for automatically winding at least the skeleton of the film sealing.
  • Automatic winding means can be connected mechanically to drive means ensuring the advance of sheet material on the cutting table, so as to control the speed tangential winding at the speed of advance of sheet material.
  • the winding means comprise a motor controlled by function of the speed of advance of sheet material on the cutting table, in order to control the tangential winding speed at this speed beforehand.
  • Means intended for depositing or forming attachments to the surface of a sealing film present on the cutting table can be provided.
  • the means of depositing or forming attachments are advantageously carried by a carriage also supporting a tool cutting can be expected.
  • the means of deposit or formation of fasteners extend transversely to the table section, at the downstream end thereof.
  • the installation comprises means for extracting film fragments by aspiration sealing, in the vicinity of the downstream end of the cutting table, and means for removing fragments of film removed.
  • the suction sampling means have a rotary drum having multiple communicating sectors with the outside through orifices opening on the surface of the drum, and means for depressurizing the sectors over part of their path in rotation between a location near the plane of the cutting table and a location near the means evacuation of film fragments.
  • Figures 1 and 2 show an automatic cutting installation of parts in sheet material, comprising a cutting station 10 located between a station 12 for loading sheet material to be cut and a station 16 for unloading pieces cut from the material in leaf.
  • the cutting station 10 includes a cutting table 20 constituted by the horizontal upper strand of an endless conveyor 22. It is housed, except for its horizontal upper surface delimiting the table 20, inside a box 24. Means suction such that one or more extractors 26 are arranged in the caisson in order to establish a depression there.
  • the conveyor 22 consists of blocks 22 a having or forming between them passages making the interior of the box communicate with the surface of the table 20.
  • the blocks 22 a for example made of plastic, have a base from which protrude a plurality of threadlike elements. In this way, a cutting tool, such as a blade, can penetrate the surface of the table 20 and move horizontally in all directions without being damaged and without damaging the blocks 22 a .
  • a sheet material to be cut 30 is brought to the table 20.
  • the sheet material is typically a flexible material, for example a textile material, such as a fabric.
  • She is brought on the table under form of a single fold or, as in the example illustrated, in the form of a mattress 30 formed of a plurality of overlapping plies.
  • the mattress 30 is for example formed on a quilting table 14 of the loading, upstream of the cutting station 10, and is advanced on the table 20 in direction X by control of a drive motor 28 of the conveyor 22.
  • upstream and downstream are used with reference to the direction of movement of the mattress 30 on the table cutting 20.
  • the roller 34 is supported at its ends by two uprights 36 fixed to the frame of the cutting station, on each side of the table 20.
  • the uprights 36 further carry a horizontal deflection roller 40.
  • the film 32 is applied against the surface of the mattress 30 by means of a roller 42 supported at its ends by two arms 44 articulated on the uprights 36.
  • the cutting of the mattress 30 carried by the table 20 and covered with the sealing film 32 is produced by means of a cutting head 50.
  • the head cutting can be brought in any position above the table 20 by control of its horizontal movement parallel to the direction longitudinal X of the conveyor 22 and to the transverse direction Y perpendicular to X.
  • the cutting head 50 is mounted on a carriage 52 which is movable in direction Y along a transverse beam 54, under the control of a motor 56.
  • the beam 54 is supported at its ends along the longitudinal edges of the conveyor 22 and is driven in direction X by a motor 48.
  • the carriage 52 can be made so conventional via cables or, as illustrated, worm 57.
  • the drive of the beam 54 can also be achieved by via cables or worms or, as illustrated, by wheels teeth and racks 59, these being fixed on the longitudinal edges box top 24.
  • the cutting head 50 carries a suspended cutting blade 60 vertically under a rotary table 62.
  • the table 62 is coupled to a motor 64 by a connecting rod-crank system allowing to print the plate 62 and the blade 60 a vertical reciprocating movement.
  • the blade 60 is adjustable under the control of a motor 66 coupled to the turntable 62.
  • the motors ensuring the movements in X, Y of the carriage carrying the cutting head above the cutting table, the vertical movement of the cutting blade, and the orientation thereof is controlled by a computer 68.
  • the latter also controls the advance of the conveyor 22 and the depression of the box 24 by which the mattress 30 covered by the waterproof film 32 is firmly held on table 20.
  • means are provided for near the downstream end of the cutting table 20 to separate at minus the skeleton 32 'of the waterproof film, deflecting it from the path of the mattress cut to recover it.
  • the mandrel 70 is supported at its ends in bearings carried by respective arms 72 fixed to the frame of the cutting station, each side of the table 20. Between its horizontal path above the table 20 and the winding mandrel 70, the skeleton 32 'passes over a deflector 74 and a deflection roller 76.
  • the deflector is a bar horizontal extending at least over the width of the table 20 and brought to its ends by plates 78 mounted on the arms 72.
  • the position of the deflector 74 in direction X and in height is adjustable in order to make so that the detachment of the skeleton 32 'relative to the mattress do substantially at the desired location.
  • the horizontal deflection roller 76 is mounted on the arms 72.
  • the deflection roller 40 is given a curved shape, or shape of "banana", as is well known in the textile field for wire or cable spreaders.
  • the separation of the skeleton 32 'and its recovery outside the unloading station 16 make it possible to prevent the unloading of stacks of parts, or logs, cut from the mattress, are hindered by the skeleton of the film.
  • the parts of the cut film 32 "can be discharged with the corresponding logs, especially when they carry identification information of the cut pieces.
  • the unloading station 16 includes a table receiving the cut mattress.
  • the table is for example constituted by the strand upper of a conveyor 17 moved in synchronism with the conveyor 22. Between the conveyors 22 and 17, the mattress passes over a support 19 in comb shape.
  • the skeleton 32 'is wound on the mandrel 70 is made of preferably in synchronism with the advance of the mattress 30 on the table 20.
  • the servo from the tangential winding speed on the mandrel to the speed advance of the mattress is achieved by mechanical coupling and system differential between the motor 28 and the mandrel 70.
  • the conveyor 22 is moved by means of the motor 28 by through a main chain 80.
  • a gear train 82 takes over this main chain and transmits its movement to a chain 84.
  • This passes over a receiving pinion 86 which is positioned on the axis of rotation of the mandrel 70 and which is connected, by means of a torque limiter 88, to a lashing bar 90 on which the mandrel 70 is mounted.
  • the connection between the torque limiter 88 and the bar 90 is made by a drive bearing 92.
  • control of the winding speed on the mandrel 70 at the speed of advance of the mattress 30 on the table 20 can be produced by electronic means, the mandrel then being provided with its own drive motor.
  • This motor is controlled by the computer 68 from signals representative of the conveyor advance, for example supplied by a coded wheel associated with a roller on which passes the conveyor 22.
  • Figures 5 and 6 schematically show a device 100 of removal of labels or self-adhesive discs 102, which is mounted on the carriage 52 supporting the cutting head, behind the cutting tool.
  • the pads 102 are carried at regular intervals by a ribbon 104 unwound of a storage roller 106. After removing the pellets, the ribbon is taken up by a receiving roller 108.
  • the rollers 106 and 108 are rotatably mounted in bearings supported by the carriage 52.
  • the ribbon 104 carrying the pellets 102 is unwound from the roll 106 passing between two drive rollers 110 pressed one against the other and powered by a stepper motor 112.
  • the latter controls intermittent advance of ribbon 104 with steps corresponding to that pellets 102 on the ribbon.
  • the rewinding of the bare tape 104 on the roller 108 is provided by a motor (not shown) connected to the roller 108 by a torque limiter.
  • the removal of the self-adhesive discs 102 on the film 32 is produced by means of an applicator 114.
  • This consists of a jack the upper of which carries a sole 116 at its end over which the ribbon 104.
  • the depositing device 100 is controlled by the computer 68 so as to deposit several pastilles 102 astride each contour cut from film 32.
  • a deposition cycle involves lowering the applicator 114 for fixing a tablet by pressure on the surface of the film 32, raising the applicator 114 and advancing one step of the tape 104.
  • the pads can be fixed at regular intervals or not the along the cut contour, as it is cut.
  • the application a patch 102 on the film can be produced while the carriage 52 is at stopping, or on the fly, while the carriage 52 is moving. In this last In this case, it is preferable that the speed of the carriage is relatively reduced. To avoid penalizing the cutting speed with stops or slowdowns imposed on the carriage 52, it will be possible to choose to deposit pellets at times when, in the cutting cycle, the carriage 52 is stationary in X, Y or moves at low speed (interruption of the advance at the end of the contour or for passing an angle with change of brutal direction, or slower advance when cutting a delicate contour portion, for example a notch).
  • the positioning of removal device immediately behind the tool allows it to track precisely the cut contour.
  • Figure 7 shows another device 120 for forming fasteners localized, the latter performing a localized welding of the film overlapping the contour, under the effect of heat.
  • the device 120 is mounted on the carriage 52 supporting the head of cutting, immediately behind the cutting tool. It includes a applicator 122 in the form of a jack, the rod of which carries, at its end, a crowbar 124, or sole, or heating punch. Welding is made by lowering the applicator 122 to bring the presser foot 124 in contact with the film 32.
  • each fastener located along each cut contour, at regular or irregular intervals, each fastener preferably being formed when the cutting tool feed is interrupted or slowed down.
  • a product having a function of welding promoter can be deposited on the film 32.
  • the deposit is carried out over a certain width on either side of the cut contour, either continuously or at the locations provided for the fasteners achieve.
  • the carriage 52 carries a spray nozzle 126 connected to a tank (not shown) by a flexible pipe provided a solenoid valve 128 controlled by the installation computer.
  • the spray nozzle 126 is located between the cutting tool (not shown in Figure 7) and the applicator 122, or in front of the cutting tool.
  • Figure 8 shows a device 130 for training continuous fasteners along the edges of the film parts cut.
  • the device 130 is mounted on the carriage 52 supporting the head of cutting, immediately behind the cutting tool. It includes a applicator 132 in the form of a jack whose rod carries, at its end, a heating roller 134.
  • the applicator 132 is supported by the carriage 52 by means of a rotary plate 135.
  • the plate 135 is controlled in rotation about its vertical axis in synchronism with the turntable carrying the cutting tool.
  • Welding is carried out by pressure exerted by the roller heating 134 on the film 32 under the action of the applicator.
  • a product having a function of welding promoter can be placed on the film 32.
  • the deposit is carried out over a certain width on either side of the cut contour, continuously.
  • the carriage 52 carries a nozzle spray 136 connected to a reservoir (not shown) by a pipe flexible fitted with a solenoid valve 138 controlled by the installation.
  • the spray nozzle is located in front of the applicator 132, in front of or behind the cutting tool.
  • the device removal or formation of fasteners is carried by the carriage 52 for supporting the cutting head.
  • this device is independent of the cutting head, which allows prevent the cutting speed from being affected by the laying or formation of attachments.
  • Figures 9 and 10 show a device 140 designed to apply strips of adhesive film over the entire width of the mattress 30 covered by film 32, at the downstream end of the cutting table, before film peeling 32.
  • the device 140 comprises a carriage 142 movable transversely, parallel to direction Y, along a beam 144 having a fixed position in direction X, immediately upstream of the deflector 74.
  • the carriage 142 is guided by beam 144 and is engaged with a screw without end 144a parallel to the beam 144 and driven by a motor 146.
  • the carriage 142 carries a clamp support 152 capable of coming into engagement laterally with the adhesive film 150 and a pressure roller 154.
  • the clamp 152 is mounted on its support by being movable horizontally in direction Y between a retracted position and a gripping position, under the control of an actuator.
  • the clamp 152 and the roller 154 are movable vertically between a raised position and a lowered position by being fixed to the ends of the rods of two respective actuators 152 a , 154 a .
  • the adhesive film 150 passes successively between the blades of a cutting device 156 and under an applicator 158.
  • the latter is formed by a roller movable vertically between a raised position and a lowered position by being fixed at the end of an actuator 158 a .
  • a cycle for removing a transverse strip of adhesive film 150 includes the following operations.
  • the clamp 152, the roller 154 and the applicator 158 being in the raised position, the clamp 152 unwinds the film 150, by engaging with the end thereof, by displacement of the carriage 142 in one direction (go) under the control of the motor 146.
  • the clamp 152, the roller 154 and the applicator 158 are lowered to bring the adhesive film 150 into contact with the film 32.
  • the clamp 152 is then open, retracted and raised and the movement of the carriage 142 is controlled in the other direction (return) by means of the 146. motor.
  • the pressure roller in the lowered position applies the adhesive film strip on the film 32.
  • the clamp 152 is brought into the gripping position to grasp the film 150 between the roller 148 and the cutting device 156. Then, the cutting device is activated, and the roller 154 and the applicator 158 have been identified. A new cycle can then be performed by moving the carriage 142 on its outward journey.
  • Each strip of adhesive film is placed between two steps in advance of the mattress.
  • the interval between strips in direction Y is chosen to ensure that each cut contour is covered by two strips at least. This interval can be regular, or adapted to dimensions of the different contours in direction Y.
  • Figures 11 and 12 show yet another mode of creation of a device for training localized attachments. As in the previous embodiment, this device 160 is carried by a carriage 162 separate from that supporting the cutting head.
  • the carriage 162 is movable transversely, parallel to the direction Y, along a beam 164 having a fixed position in direction X, immediately upstream of the deflector 74.
  • the carriage 162 is guided by the beam 164 and is engaged with an endless screw 164a parallel to the beam 164 and driven by a motor 166.
  • the carriage 162 carries a projection nozzle 168 connected to a pressurized tank (not shown) containing a promoter material welding by a flexible pipe 170 provided with a solenoid valve 174.
  • the carriage 162 carries a mirror 176 intended to reflect towards the surface of the film 32 a laser radiation produced by a generator 178 located in a side of the installation.
  • the projection of the welding promoter material can be performed when the carriage 162 is moved in one direction in the Y direction while welding is carried out by heating by means of radiation laser by operating the generator when moving the carriage 162 in the other direction.
  • Welding can be limited to areas of intersection between the contours and the X trajectory of the radiation laser, by corresponding modulation of the radiation produced by the generator.
  • the intervals between welding lines are chosen, in the same way way that the intervals between strips of adhesive film in the example previous, so that each contour is cut by at least two lines welding.
  • the heating for welding can be carried out not by projection of laser radiation, but by application of a heating element, for example a heating roller carried by the carriage 162.
  • a second embodiment of the invention is shown by the Figures 13 to 17. This embodiment differs from that of Figures 1 to 4 only by means of recovery of the film fragments in the downstream end area of the cutting table.
  • the other elements of the installation are common to both modes of production. These common elements have the same reference and will not be described again in detail.
  • the fragments of the sealing film 32 i.e. the skeleton 32 ' and the parts of film 32 "cut with the parts in the mattress 30, are taken by suction at the downstream end of the cutting table 20 at means of a movable member 200 to be released outside the path of the mattress and brought to an evacuation device 250.
  • the movable member 200 shown in more detail in FIGS. 15 to 17, is in the form of a sectored annular hollow drum. It includes a hub 202, an outer wall 204 traversed by a plurality openings 206 and radial partitions 208 that extend all the way drum between the hub and the outer wall. Partitions 208 divide the drum into several sectors 210. These are among six in the example shown, but this number may be different.
  • openings connect each sector with the outside, at the peripheral surface 205 of the drum, over the entire length of it.
  • the openings 206 may be in the form of perforations or slots, for example circumferential slots extending over a part of the circumference of the drum, corresponding to each sector, as in the example illustrated.
  • the sectors of the drum 200 are closed by annular flanges 212, 214 fixed to the drum.
  • the drum 200 is mounted on an axis 216, the ends of which are engaged through plate openings 218, 220 forming bearings.
  • the drum 200 is free to rotate about the axis 216.
  • the evacuation device 250 comprises a tank or receptacle for reception 252 fixed to the plates 218, 220, immediately downstream of the drum 200.
  • the tank 252 has a horizontal bottom wall 254, located substantially at the same level as that of the lower edges of the plates 218, 220.
  • the wall 254 is folded back at its upstream end to form a rim 256 set back from the downstream generator 200b of the drum. At its downstream end, the wall 254 is folded back to form a downstream wall 258 of tank 252.
  • the tank 252 is provided with side walls 260, 262. These are fixed on a tab 264 secured to the plates 218, 220 and support all of the longitudinal walls 254, 256, 258 of the tray.
  • the device evacuation 250 may also include an extraction system by worm 270. This is fixed, with its drive motor 272, on one of the side walls 260 of the receiving tank 252. The fragments of sealing film recovered in the tank are extracted by the screw 270 to through an opening formed in the other side wall 262 and communicating, for example, with a chute 274.
  • the plates 218, 220 supporting the drum 200 and the device 250 are pivotally mounted around a horizontal axis on supports 222, 224. These are fixed to the table frame cutting 20, on each side thereof. Pivots 226, 228 carried by the supports 222, 224 pass through openings in the plates 218, 220 located in the lower parts thereof. In this way, the whole comprising the drum 200 and the receiving tank 252, articulated on the supports 222, 224 rests by its weight on the mattress 30 coated with the film 32. As shown in FIG. 15, the lower generator 200a of the drum is lower than the lower edges of the plates 218, 220, so that the contact between the drum 200 and the mattress 30 is made only along the generator 200a.
  • the rotation drive of the drum 200 with the flanges 212, 214 around the axis 216 is therefore produced by contact with the mattress 30 when this is advanced under the control of the motor 28 conveyor drive 22.
  • the rotation drive of the drum 200 can be provided by a drive device, preferably disengageable, associated with an independent or driven motorization by means of the motor 28, in synchronism with the conveyor 22. Contact between the drum 200 and the mattress 30 is then not necessary, the surface of the drum can just flush with that of the mattress.
  • the plate 218 which is in contact, practically free of play, with the flange 212 having two openings or lights 236, 238.
  • Lines 240, 242 connect the lights 236, 238 ( Figure 15) respectively to a vacuum source and an air source under pressure (not shown).
  • the slots 236 and 238 each extend along an arc with a central line located substantially on the same circumference as the centers of the openings 234 and a width substantially equal to the dimension of the openings 234.
  • the slot 236 extends from a point 236 a located slightly downstream of the generator 200 a of the drum to a point 236 b located substantially at the level of the generator 200 b of the drum.
  • the light 238 extends from a point 238 a located substantially at equal angular distance from the generator 200 b and from the upper generator 200 c of the drum to a point 238 b located substantially at the level of this generator 200 c .
  • the angular position of the lights 236, 238 makes it possible to carry out a suction between the moment when the drum arrives near the mattress covered with the film and the moment when the drum overhangs the interior of the receiving tank 252 (the upstream wall 256 of the latter. ci being upstream of the downstream generator 200 b of the drum), and of producing a backflow after the suction until about the moment when the surface of the drum passes at the level of the upper generator 200 c .
  • the fragments of film sucked up are well evacuated in the tank 252.
  • the angular distance between points 236 b and 238 a of lights 236 and 238 is at least equal to the angular dimension of an opening 234, so that the same opening is not simultaneously opposite the lights 236, 238.
  • L The maximum angular interval between the start of the discharge and the end of the discharge, or between the start of the suction and the end of the suction, determines the maximum angle of each sector and therefore the minimum number thereof. In practice, this minimum number is equal to 4, preferably to 5. It will also be noted that fragments of sealing film which may be of small dimensions, in certain cutting configurations, the density of the openings 206 on the surface of the drum must to be quite high. In the case of circumferential slots, as in the example illustrated, the pitch between slots is chosen between approximately 5 mm and 20 mm.
  • FIGs 18 to 20 illustrate an alternative embodiment of the installation of Figures 13 to 17, the difference being in the form of realization of the evacuation device.
  • the evacuation of the fragments of sealing film is made by transfer through a pipe outlet 290 between a receiving tank 280 and a recovery 292, the film fragments being for example collected in a carriage 294.
  • the receiving tray 280 has a form of hood which opens at its lower part in close proximity to the surface of the drum 200.
  • the opening 282 of the hood 280 extends substantially from immediately before the end of the suction zone until the end of the zone delivery (shown schematically in Figure 20).
  • the fragments of sealing film collected in the hood 280 are propelled by pressurized air used for delivery, to reach the recovery device 292, through line 290.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Control Of Cutting Processes (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne un procédé et une installation pour la coupe automatique de pièces de formes prédéterminées dans une matière en feuille selon les préambules respectifs des revendications 1 et 25 (voir DE-A-4344814).The invention relates to a method and an installation for cutting. automatic of pieces of predetermined shapes in a material in sheet according to the respective preambles of claims 1 and 25 (see DE-A-4344814).

Un domaine particulier d'application de l'invention est la découpe automatique de pièces dans des plis de matière textile, en particulier dans l'industrie de l'habillement. L'invention est aussi applicable à la découpe de textiles techniques dans des applications industrielles, et à la découpe de matières non tissées, comme le cuir.A particular field of application of the invention is cutting automatic of pieces in plies of textile material, in particular in the clothing industry. The invention is also applicable to cutting of technical textiles in industrial applications, and cutting non-woven materials, such as leather.

Arrière-plan de l'inventionInvention background

Un procédé bien connu voir DE-A-4344814 pour la découpe de pièces dans une matière souple en feuille consiste à amener la matière en feuille sur une table dans une zone de coupe, soit en un pli unique, soit en plusieurs plis superposés formant un matelas, et à découper des pièces conformément à un placement préétabli au moyen d'un outil qui pénètre dans la matière alors que la matière en feuille est maintenue sur la table par dépression, avec application d'un film d'étanchéité souple sur la surface de la matière en feuille. La dépression est obtenue par aspiration à travers la surface de la table. L'outil est un couteau animé d'un mouvement vibratoire vertical ou une lame circulaire dont le déplacement par rapport à la table est commandé afin de découper les pièces ayant les formes voulues, et aux emplacements à la surface de la matière en feuille définis par le placement préétabli. L'outil coupe non seulement la matière en feuille mais aussi le film d'étanchéité appliqué sur celle-ci.A well-known process see DE-A-4344814 for cutting parts in a flexible sheet material consists of bringing the sheet material onto a table in a cutting area, either in a single ply or in several plies superimposed forming a mattress, and cutting pieces in accordance to a predetermined placement by means of a tool which penetrates the material while the sheet material is held on the table by vacuum, with application of a flexible sealing film on the surface of the material in sheet. The depression is obtained by suction through the surface of Table. The tool is a knife animated by a vertical vibratory movement or a circular blade whose displacement relative to the table is ordered to cut the pieces having the desired shapes, and to locations on the surface of the sheet material defined by the preset placement. Tool not only cuts sheet material but also the sealing film applied to it.

En aval de la zone de coupe se trouve une zone de déchargement où sont récupérées les pièces découpées dans la matière en feuille. Chaque pièce découpée dans un pli unique, ou chaque pile de pièces (ou "bûche") découpée dans un matelas, est surmontée d'une partie de même forme découpée dans le film d'étanchéité. Les pièces ou bûches découpées, éventuellement toujours munies de la partie du film d'étanchéité correspondante sur laquelle peuvent être portées des informations d'identification, sont prélevées en zone de déchargement pour être dirigées ou stockées provisoirement en vue de leur utilisation ultérieure.Downstream of the cutting area is an area of unloading where the pieces cut from the material are recovered in sheet. Each piece cut from a single fold, or each stack of pieces (or "log") cut from a mattress, is surmounted by a part of the same shape cut from the sealing film. The pieces or cut logs, possibly always fitted with the film part corresponding seal on which can be worn identification information, are taken from the unloading area to be directed or temporarily stored for use higher.

La présence, dans la zone de déchargement, des squelettes de la matière en feuille et du film d'étanchéité pose différents problèmes. Par squelettes, on entend ici les chutes des plis ou matelas de matière en feuille et de film d'étanchéité ayant la forme complémentaire de celle de l'ensemble des pièces découpées. En effet, ces chutes encombrent la zone de déchargement et doivent être évacuées par un opérateur. De plus, la présence des chutes peut compliquer l'identification des pièces à décharger et ce d'autant lorsque au moins certaines des pièces sont difficiles à distinguer des chutes.The presence, in the unloading area, of the skeletons of the sheet material and sealing film poses different problems. Through skeletons, we mean here the fall of the folds or mattress of material in sheet and sealing film having the shape complementary to that of all of the cut pieces. Indeed, these falls clutter the unloading area and must be evacuated by an operator. Of more, the presence of falls can complicate the identification of parts to unload, especially when at least some of the parts are difficult to distinguish from falls.

Objet et résumé de l'inventionSubject and summary of the invention

L'invention a pour but de remédier aux difficultés évoquées ci-avant et, selon un de ses aspects, propose à cet effet un procédé de coupe automatique de matière en feuille du type comprenant l'amenée d'au moins un pli de matière en feuille sur une table dans une zone de coupe, le maintien de la matière en feuille sur la table par dépression, l'application d'un film d'étanchéité sur la surface de la matière en feuille, la découpe de pièces de formes prédéterminées au moyen d'un outil traversant le film d'étanchéité et la matière en feuille, et l'évacuation de pièces découpées en aval de la table,
   procédé dans lequel au moins le squelette du film d'étanchéité est dévié du trajet de la matière en feuille dans une zone d'extrémité aval de la table pour être récupéré automatiquement, séparément des pièces découpées.The invention aims to remedy the difficulties mentioned above and, according to one of its aspects, proposes for this purpose an automatic cutting process of sheet material of the type comprising the supply of at least one ply of material in sheet on a table in a cutting area, holding the sheet material on the table by vacuum, applying a sealing film to the surface of the sheet material, cutting pieces of predetermined shapes at by means of a tool passing through the sealing film and the sheet material, and the removal of cut pieces downstream of the table,
process in which at least the skeleton of the sealing film is deflected from the path of the sheet material in a downstream end region of the table to be recovered automatically, separately from the cut pieces.

Selon un premier mode de réalisation, au moins le squelette du film d'étanchéité est récupéré par ré-enroulement automatique. Le ré-enroulement peut être effectué par appel sur un mandrin à une vitesse tangentielle asservie à la vitesse de déplacement de la matière en feuille sur la table.According to a first embodiment, at least the skeleton of the sealing film is recovered by automatic rewinding. The rewinding can be performed by call on a chuck at a speed tangential slaved to the speed of movement of the sheet material on the table.

Avantageusement, la découpe des pièces est réalisée en conservant l'intégrité du squelette, afin qu'il soit récupéré automatiquement de façon continue. Le cas échéant, l'intégrité du squelette pourrait être rétablie par dépôt d'attaches, par exemple localisées à la surface du film d'étanchéité. Advantageously, the cutting of the parts is carried out in maintaining the integrity of the skeleton, so that it can be recovered automatically continuously. If applicable, the integrity of the skeleton could be restored by depositing attachments, for example located on the surface of the sealing film.

Ainsi, le squelette du film d'étanchéité est absent de la zone de déchargement, diminuant l'encombrement de celle-ci.Thus, the skeleton of the sealing film is absent from the area of unloading, reducing the size thereof.

L'absence de squelette du film peut rendre plus aisée l'identification des pièces ou bûches découpées, puisque ce sont les seules parties de la matière en feuille qui restent couvertes par le film d'étanchéité en zone de déchargement, dans la mesure où la séparation entre le squelette et les parties découpées du film d'étanchéité est bien réalisée. Cette séparation peut être facilitée en étalant au mieux le film d'étanchéité de manière qu'il soit tendu sur la surface de la matière en feuille pendant la découpe.The absence of a film skeleton can make it easier the identification of the cut pieces or logs, since these are the only parts of the sheet material which remain covered by the film sealing in the unloading area, insofar as the separation between the skeleton and the cut parts of the sealing film is fine performed. This separation can be facilitated by spreading the film as well as possible. sealing so that it is stretched over the surface of the material in sheet during cutting.

Dans une variante du premier mode de réalisation de l'invention, le squelette du film d'étanchéité est évacué et récupéré avec au moins certaines des parties découpées du film. A cet effet, après découpe d'une pièce, la liaison entre la partie découpée du film d'étanchéité et le squelette peut être rétablie au moyen d'attaches déposées ou formées sur le film de façon localisée ou continue le long des lignes de découpe. On peut alors disposer d'un film d'étanchéité partiellement ou totalement reconstitué, susceptible d'être remployé.In a variant of the first embodiment of the invention, the skeleton of the sealing film is evacuated and recovered with at least some of the cut parts of the film. To this end, after cutting a part, the connection between the cut part of the sealing film and the skeleton can be restored by means of fasteners deposited or formed on the film locally or continuously along the cutting lines. We can then have a sealing film partially or totally reconstituted, likely to be reused.

Selon un deuxième mode de réalisation, des fragments du film d'étanchéité constitués par le squelette et des parties du film découpées avec les pièces sont prélevés par aspiration hors du trajet de la matière en feuille puis évacués.According to a second embodiment, fragments of the film sealing formed by the skeleton and cut parts of the film with the parts are withdrawn by suction from the material path in sheet then evacuated.

De préférence, le prélèvement des fragments de film est réalisé au moyen d'un organe mobile adjacent au trajet de la matière en feuille.Preferably, the film fragments are removed by means of a movable member adjacent to the path of the sheet material.

Avantageusement, l'organe mobile est entraíné en rotation par contact avec la matière en feuille et avance de celle-ci. En variante, l'organe mobile peut être entraíné en rotation au moyen d'un dispositif éventuellement débrayable, associé à une motorisation indépendante ou mû en synchronisme avec des moyens de déplacement de la matière en feuille sur la table.Advantageously, the movable member is rotated by contact with the sheet material and advance thereof. Alternatively, the organ mobile can be rotated by means of a device possibly disengageable, associated with an independent motorization or moved in synchronism with means for moving the material in leaf on the table.

Avantageusement encore, on utilise un organe mobile rotatif comprenant plusieurs secteurs, et une dépression est établie dans chaque secteur pendant le déplacement de celui-ci entre la proximité du trajet de la matière en feuille et une zone d'évacuation de fragments de film. Une surpression peut ensuite être établie dans chaque secteur lorsqu'il parvient dans la zone d'évacuation. Advantageously also, a rotary movable member is used comprising several sectors, and a depression is established in each sector during its movement between the proximity of the path of the sheet material and an area for removing fragments of movie. Overpressure can then be established in each sector when it enters the evacuation zone.

Les fragments de film peuvent être évacués par dépôt dans un réceptacle situé au-dessus du trajet de la matière en feuille et extraction du réceptacle ou en étant amenés à un conduit d'évacuation.The film fragments can be removed by deposit in a receptacle located above the path of the sheet material and extraction from the receptacle or by being brought to a discharge pipe.

Selon un autre aspect de l'invention, celle-ci a pour objet une installation de coupe automatique de matière en feuille permettant la mise en oeuvre du procédé ci-avant.According to another aspect of the invention, it relates to a automatic cutting equipment for sheet material allowing the setting using the above method.

A cet effet, il est proposé une installation du type comprenant une table de coupe, un poste de chargement de matière en feuille à découper à une extrémité amont de la table de coupe, un poste de déchargement de pièces découpées à une extrémité aval de la table de coupe, des moyens d'établissement d'une dépression à la surface de la table de coupe, et des moyens d'amenée d'un film d'étanchéité souple au voisinage de l'extrémité amont de la table de coupe, installation dans laquelle il est en outre prévu des moyens pour séparer au moins un squelette de film d'étanchéité au voisinage de l'extrémité aval de la table de coupe et pour le récupérer automatiquement hors du poste de déchargement de pièces découpées.To this end, an installation of the type comprising a cutting table, a loading station for cutting sheet material at an upstream end of the cutting table, an unloading station pieces cut at a downstream end of the cutting table, means of establishing a depression on the surface of the table cutting, and means for supplying a flexible sealing film to the near the upstream end of the cutting table, installation in which means are further provided for separate at least one skeleton of sealing film in the vicinity of the downstream end of the cutting table and to retrieve it automatically outside the unloading station for cut pieces.

Selon un premier mode de réalisation, l'installation comprend des moyens d'enroulement automatique d'au moins le squelette du film d'étanchéité. Les moyens d'enroulement automatique peuvent être reliés mécaniquement à des moyens d'entraínement assurant l'avance de matière en feuille sur la table de coupe, de manière à asservir la vitesse tangentielle d'enroulement à la vitesse d'avance de matière en feuille. En variante, les moyens d'enroulement comportent un moteur commandé en fonction de la vitesse d'avance de matière en feuille sur la table de coupe, afin d'asservir la vitesse tangentielle d'enroulement à cette vitesse d'avance.According to a first embodiment, the installation comprises means for automatically winding at least the skeleton of the film sealing. Automatic winding means can be connected mechanically to drive means ensuring the advance of sheet material on the cutting table, so as to control the speed tangential winding at the speed of advance of sheet material. In variant, the winding means comprise a motor controlled by function of the speed of advance of sheet material on the cutting table, in order to control the tangential winding speed at this speed beforehand.

Des moyens destinés au dépôt ou à la formation d'attaches à la surface d'un film d'étanchéité présent sur la table de coupe peuvent être prévus. Les moyens de dépôt ou formation d'attaches sont avantageusement portés par un chariot supportant également un outil de coupe peuvent être prévus. En variante, les moyens de dépôt ou formation d'attaches s'étendent transversalement par rapport à la table de coupe, à l'extrémité aval de celle-ci.Means intended for depositing or forming attachments to the surface of a sealing film present on the cutting table can be provided. The means of depositing or forming attachments are advantageously carried by a carriage also supporting a tool cutting can be expected. As a variant, the means of deposit or formation of fasteners extend transversely to the table section, at the downstream end thereof.

Selon un deuxième mode de réalisation, l'installation comporte des moyens de prélèvement par aspiration de fragments de film d'étanchéité, au voisinage de l'extrémité aval de la table de coupe, et des moyens d'évacuation de fragments de film prélevés.According to a second embodiment, the installation comprises means for extracting film fragments by aspiration sealing, in the vicinity of the downstream end of the cutting table, and means for removing fragments of film removed.

Avantageusement, les moyens de prélèvement par aspiration comportent un tambour rotatif ayant plusieurs secteurs qui communiquent avec l'extérieur à travers des orifices s'ouvrant à la surface du tambour, et des moyens de mise en dépression des secteurs sur une partie de leur trajet en rotation entre un emplacement situé à proximité du plan de la table de coupe et un emplacement situé à proximité des moyens d'évacuation de fragments de film.Advantageously, the suction sampling means have a rotary drum having multiple communicating sectors with the outside through orifices opening on the surface of the drum, and means for depressurizing the sectors over part of their path in rotation between a location near the plane of the cutting table and a location near the means evacuation of film fragments.

Brève description des dessinsBrief description of the drawings

D'autres particularités et avantages de l'invention ressortiront à la lecture de la description faite ci-après, à titre indicatif mais non limitatif, en référence aux dessins annexés sur lesquels :

  • la Figure 1 est une vue très schématique en élévation latérale d'un mode de réalisation d'une installation de coupe selon l'invention,
  • la Figure 2 est une vue de dessus de l'installation de la Figure 1,
  • la Figure 3 est une vue en élévation latérale montrant de façon plus détaillée la zone d'extrémité aval de la table de coupe de l'installation montrée par la Figure 1,
  • la Figure 4 est une vue de face dans la direction A de la Figure 3,
  • la Figure 5 est une vue partielle de détail d'un chariot tel que celui de l'installation de la Figure 1, portant un dispositif de dépôt d'attaches localisées, selon une première variante de réalisation de l'installation de la Figure 1,
  • la Figure 6 est une vue en élévation de face du chariot de la figure 5,
  • la Figure 7 est une vue partielle de détail d'un chariot tel que celui de l'installation de la figure 1, portant un dispositif de formation d'attaches localisées, selon une deuxième variante de réalisation de l'installation de la Figure 1,
  • la Figure 8 est une vue partielle de détail d'un chariot tel que celui de l'installation de la figure 1, portant un dispositif de formation d'attaches continues, selon une troisième variante de réalisation de l'installation de la Figure 1,
  • la Figure 9 est une vue en élévation illustrant un dispositif de pose de bande adhésive transversale selon une quatrième variante de réalisation de l'installation de la Figure 1,
  • la Figure 10 est une vue de dessus du dispositif de pose de bande adhésive de la Figure 9,
  • la Figure 11 est une vue en élévation illustrant un dispositif de formation de lignes de soudage transversales selon une cinquième variante de réalisation de l'installation de la Figure 1,
  • la Figure 12 est une vue de dessus du dispositif de formation de lignes de soudage de la Figure 11,
  • la Figure 13 est une vue schématique en élévation latérale d'un deuxième mode de réalisation d'une installation de coupe conforme à l'invention,
  • la Figure 14 est une vue partielle de dessus de l'installation de la Figure 13,
  • la Figure 15 est une vue de détail en élévation latérale à échelle agrandie du tambour de prélèvement et du réceptacle de récupération de fragments de film de l'installation de la Figure 13,
  • la Figure 16 une vue partielle de dessus du tambour et du réceptacle de l'installation de la Figure 13, en coupe selon la ligne XVI-XVI de la Figure 15,
  • la Figure 17 est une vue en coupe transversale du tambour de la Figure 15,
  • la Figure 18 est une vue schématique en élévation latérale d'une variante de réalisation de l'installation de la Figure 13,
  • la Figure 19 est une vue partielle de dessus de l'installation de la Figure 18, et
  • la Figure 20 est une vue partielle de détail, à échelle agrandie, en élévation latérale et en coupe, du tambour de prélèvement et des moyens d'évacuation de l'installation de la Figure 18.
Other features and advantages of the invention will emerge on reading the description given below, by way of indication but not limitation, with reference to the appended drawings in which:
  • FIG. 1 is a very schematic view in side elevation of an embodiment of a cutting installation according to the invention,
  • Figure 2 is a top view of the installation of Figure 1,
  • FIG. 3 is a side elevation view showing in more detail the downstream end zone of the cutting table of the installation shown in FIG. 1,
  • FIG. 4 is a front view in direction A of FIG. 3,
  • FIG. 5 is a partial detail view of a carriage such as that of the installation of FIG. 1, carrying a device for depositing localized fasteners, according to a first alternative embodiment of the installation of FIG. 1,
  • FIG. 6 is a front elevation view of the carriage of FIG. 5,
  • FIG. 7 is a partial detail view of a carriage such as that of the installation of FIG. 1, carrying a device for forming localized attachments, according to a second alternative embodiment of the installation of FIG. 1,
  • FIG. 8 is a partial detail view of a carriage such as that of the installation of FIG. 1, carrying a device for forming continuous fasteners, according to a third alternative embodiment of the installation of FIG. 1,
  • FIG. 9 is an elevation view illustrating a device for applying transverse adhesive tape according to a fourth alternative embodiment of the installation of FIG. 1,
  • FIG. 10 is a top view of the device for applying adhesive tape of FIG. 9,
  • FIG. 11 is an elevation view illustrating a device for forming transverse welding lines according to a fifth alternative embodiment of the installation of FIG. 1,
  • FIG. 12 is a top view of the device for forming welding lines of FIG. 11,
  • FIG. 13 is a schematic side elevation view of a second embodiment of a cutting installation according to the invention,
  • Figure 14 is a partial top view of the installation of Figure 13,
  • FIG. 15 is a detail view in side elevation on an enlarged scale of the sampling drum and of the receptacle for recovering film fragments of the installation of FIG. 13,
  • FIG. 16 a partial top view of the drum and of the receptacle of the installation of FIG. 13, in section along the line XVI-XVI of FIG. 15,
  • FIG. 17 is a cross-sectional view of the drum of FIG. 15,
  • FIG. 18 is a schematic side elevation view of an alternative embodiment of the installation of FIG. 13,
  • Figure 19 is a partial top view of the installation of Figure 18, and
  • FIG. 20 is a partial detail view, on an enlarged scale, in side elevation and in section, of the sampling drum and means for evacuating the installation of FIG. 18.

Description détaillée de modes préférés de l'inventionDetailed description of preferred modes of the invention

Les Figures 1 et 2 montrent une installation de coupe automatique de pièces dans une matière en feuille, comprenant un poste de coupe 10 situé entre un poste 12 de chargement de matière en feuille à couper et un poste 16 de déchargement de pièces découpées dans la matière en feuille. Figures 1 and 2 show an automatic cutting installation of parts in sheet material, comprising a cutting station 10 located between a station 12 for loading sheet material to be cut and a station 16 for unloading pieces cut from the material in leaf.

Le poste de coupe 10 comprend une table de coupe 20 constituée par le brin supérieur horizontal d'un convoyeur sans fin 22. Celui-ci est logé, à l'exception de sa surface supérieure horizontale délimitant la table 20, à l'intérieur d'un caisson 24. Des moyens d'aspiration tels qu'un ou plusieurs extracteurs 26 sont disposés dans le caisson afin d'y établir une dépression.The cutting station 10 includes a cutting table 20 constituted by the horizontal upper strand of an endless conveyor 22. It is housed, except for its horizontal upper surface delimiting the table 20, inside a box 24. Means suction such that one or more extractors 26 are arranged in the caisson in order to establish a depression there.

Le convoyeur 22 est constitué de blocs 22a présentant ou ménageant entre eux des passages faisant communiquer l'intérieur du caisson avec la surface de la table 20. Les blocs 22a, par exemple en matière plastique, comportent une base de laquelle font saillie une pluralité d'éléments filiformes. De la sorte, un outil de coupe, telle qu'une lame, peut pénétrer dans la surface de la table 20 et se mouvoir horizontalement dans toutes les directions sans être endommagée et sans endommager les blocs 22a.The conveyor 22 consists of blocks 22 a having or forming between them passages making the interior of the box communicate with the surface of the table 20. The blocks 22 a , for example made of plastic, have a base from which protrude a plurality of threadlike elements. In this way, a cutting tool, such as a blade, can penetrate the surface of the table 20 and move horizontally in all directions without being damaged and without damaging the blocks 22 a .

Une matière en feuille à découper 30 est amenée sur la table 20. La matière en feuille est typiquement une matière souple, par exemple une matière textile, tel qu'un tissu. Elle est amenée sur la table sous forme d'un pli unique ou, comme dans l'exemple illustré, sous forme d'un matelas 30 formé d'une pluralité de plis superposés. Le matelas 30 est par exemple constitué sur une table de matelassage 14 du poste de chargement, en amont du poste de coupe 10, et est avancé sur la table 20 en direction X par commande d'un moteur d'entraínement 28 du convoyeur 22. Dans toute la description, les termes "amont" et "aval" sont utilisés en référence au sens de déplacement du matelas 30 sur la table de coupe 20.A sheet material to be cut 30 is brought to the table 20. The sheet material is typically a flexible material, for example a textile material, such as a fabric. She is brought on the table under form of a single fold or, as in the example illustrated, in the form of a mattress 30 formed of a plurality of overlapping plies. The mattress 30 is for example formed on a quilting table 14 of the loading, upstream of the cutting station 10, and is advanced on the table 20 in direction X by control of a drive motor 28 of the conveyor 22. Throughout the description, the terms "upstream" and "downstream" are used with reference to the direction of movement of the mattress 30 on the table cutting 20.

Un film souple 32 en matière plastique étanche à l'air, par exemple un film de polyéthylène, est tiré d'un rouleau horizontal 34 situé au niveau de l'extrémité amont de la table 20, en surplomb par rapport à celle-ci, et est déposé sur le matelas 30 afin de le couvrir complètement. Le rouleau 34 est supporté à ses extrémités par deux montants 36 fixés au bâti du poste de coupe, de chaque côté de la table 20. Les montants 36 portent en outre un rouleau de renvoi horizontal 40. Le film 32 est appliqué contre la surface du matelas 30 au moyen d'un rouleau 42 supporté à ses extrémités par deux bras 44 articulés sur les montants 36.A flexible film 32 made of airtight plastic, by example a polyethylene film, is taken from a horizontal roller 34 located at the upstream end of the table 20, overhanging with respect to this, and is deposited on the mattress 30 in order to completely cover it. The roller 34 is supported at its ends by two uprights 36 fixed to the frame of the cutting station, on each side of the table 20. The uprights 36 further carry a horizontal deflection roller 40. The film 32 is applied against the surface of the mattress 30 by means of a roller 42 supported at its ends by two arms 44 articulated on the uprights 36.

La découpe du matelas 30 porté par la table 20 et recouvert du film d'étanchéité 32 est réalisée au moyen d'une tête de coupe 50. La tête de coupe peut être amenée en toute position au-dessus de la table 20 par commande de son déplacement horizontal parallèlement à la direction longitudinale X du convoyeur 22 et à la direction transversale Y perpendiculaire à X.The cutting of the mattress 30 carried by the table 20 and covered with the sealing film 32 is produced by means of a cutting head 50. The head cutting can be brought in any position above the table 20 by control of its horizontal movement parallel to the direction longitudinal X of the conveyor 22 and to the transverse direction Y perpendicular to X.

La tête de coupe 50 est montée sur un chariot 52 qui est mobile en direction Y le long d'une poutre transversale 54, sous la commande d'un moteur 56. La poutre 54 est soutenue à ses extrémités le long des bords longitudinaux du convoyeur 22 et est entraínée en direction X par un moteur 48. L'entraínement du chariot 52 peut être réalisé de façon classique par l'intermédiaire de câbles ou, comme illustré, de vis sans fin 57. L'entraínement de la poutre 54 peut également être réalisé par l'intermédiaire de câbles ou vis sans fin ou, comme illustré, par roues dentées et crémaillères 59, celles-ci étant fixées sur les rebords longitudinaux supérieurs du caisson 24.The cutting head 50 is mounted on a carriage 52 which is movable in direction Y along a transverse beam 54, under the control of a motor 56. The beam 54 is supported at its ends along the longitudinal edges of the conveyor 22 and is driven in direction X by a motor 48. The carriage 52 can be made so conventional via cables or, as illustrated, worm 57. The drive of the beam 54 can also be achieved by via cables or worms or, as illustrated, by wheels teeth and racks 59, these being fixed on the longitudinal edges box top 24.

La tête de coupe 50 porte une lame de coupe 60 suspendue verticalement sous un plateau rotatif 62. Du côté supérieur, le plateau 62 est couplé à un moteur 64 par un système bielle-manivelle permettant d'imprimer au plateau 62 et à la lame 60 un mouvement alternatif vertical. La lame 60 est orientable sous la commande d'un moteur 66 couplé au plateau rotatif 62.The cutting head 50 carries a suspended cutting blade 60 vertically under a rotary table 62. On the upper side, the table 62 is coupled to a motor 64 by a connecting rod-crank system allowing to print the plate 62 and the blade 60 a vertical reciprocating movement. The blade 60 is adjustable under the control of a motor 66 coupled to the turntable 62.

Les moteurs assurant les déplacements en X, Y du chariot portant la tête de coupe au-dessus de la table de coupe, le mouvement vertical alternatif de la lame de coupe, et l'orientation de celle-ci sont commandés par un calculateur 68. Ce dernier commande également l'avance du convoyeur 22 et la mise en dépression du caisson 24 grâce à laquelle le matelas 30 recouvert par le film étanche 32 est fermement maintenu sur la table 20.The motors ensuring the movements in X, Y of the carriage carrying the cutting head above the cutting table, the vertical movement of the cutting blade, and the orientation thereof is controlled by a computer 68. The latter also controls the advance of the conveyor 22 and the depression of the box 24 by which the mattress 30 covered by the waterproof film 32 is firmly held on table 20.

Une installation telle que décrite ci-avant est bien connue de l'homme de l'art. On pourra par exemple se référer au document de brevet US 3 848 490. Les déplacements de la tête de coupe en X, Y sont commandés de manière à découper des pièces dans le matelas 30 suivant un placement déterminé. Les pièces sont par exemple des éléments constitutifs de vêtements et leur placement est notamment effectué pour minimiser les pertes de matière. Pendant la coupe, la lame de coupe est orientée de manière à rester tangente ou sensiblement tangente au contour de la pièce découpée. Lorsqu'une section de matelas 30 présente sur la table 20 a été découpée, avec le film étanche 32, une avance du convoyeur 22 est commandée par le moteur 28 pour avancer une nouvelle section de matelas ou un nouveau matelas. Il est également possible de réaliser l'avance du matelas sans interruption de la coupe, des longueurs successives de matelas étant amenées sur la table de coupe 20 au fur et à mesure de la progression de la coupe. Un procédé permettant de réaliser l'avance du matelas en temps masqué pendant la coupe est décrit dans la demande de brevet français FR 2 707 545.An installation as described above is well known to one skilled in the art. We could for example refer to the patent document US 3 848 490. The displacements of the cutting head in X, Y are controlled so as to cut parts in the mattress 30 following a specific placement. The pieces are for example constituent elements of clothing and their placement is in particular performed to minimize material loss. During cutting, the blade of cutting is oriented so as to remain tangent or substantially tangent to the contour of the cut piece. When a mattress section 30 present on the table 20 has been cut, with the waterproof film 32, a advance of the conveyor 22 is controlled by the motor 28 to advance a new mattress section or a new mattress. he is also possible to advance the mattress without interrupting the cut, successive lengths of mattresses being brought to the table section 20 as the cutting progresses. A method allowing the mattress to advance in masked time during the section is described in French patent application FR 2 707 545.

Conformément à l'invention, des moyens sont prévus au voisinage de l'extrémité aval de la table de coupe 20 pour séparer au moins le squelette 32' du film étanche, en le déviant du trajet du matelas découpé, afin de le récupérer.In accordance with the invention, means are provided for near the downstream end of the cutting table 20 to separate at minus the skeleton 32 'of the waterproof film, deflecting it from the path of the mattress cut to recover it.

Dans le mode de réalisation illustré par les Figures 1 à 3, seul le squelette 32' est séparé, tandis que les parties 32" de film étanche découpées avec les pièces dans le matelas 30 restent sur ces pièces. Le squelette 32' est récupéré par enroulement en étant appelé sur un mandrin 70 d'axe horizontal parallèle à la direction Y. On utilise par exemple un mandrin sur lequel une bobine de film étanche était préalablement enroulée et qui a été récupéré après utilisation du film complet.In the embodiment illustrated in Figures 1 to 3, only the skeleton 32 'is separated, while the 32 "parts of waterproof film cut with the parts in the mattress 30 remain on these parts. The skeleton 32 'is recovered by winding by being called on a mandrel 70 with a horizontal axis parallel to the Y direction. example a mandrel on which a reel of waterproof film was previously rolled up and recovered after using the film full.

Le mandrin 70 est supporté à ses extrémités dans des paliers portés par des bras respectifs 72 fixés au bâti du poste de coupe, de chaque côté de la table 20. Entre son trajet horizontal au-dessus de la table 20 et le mandrin d'enroulement 70, le squelette 32' passe sur un déflecteur 74 et un rouleau de renvoi 76. Le déflecteur est une barre horizontale s'étendant au moins sur la largeur de la table 20 et portée à ses extrémités par des platines 78 montées sur les bras 72. La position du déflecteur 74 suivant la direction X et en hauteur est réglable afin de faire en sorte que le décollement du squelette 32' par rapport au matelas se fasse sensiblement à l'endroit désiré. Le rouleau horizontal de renvoi 76 est monté sur les bras 72.The mandrel 70 is supported at its ends in bearings carried by respective arms 72 fixed to the frame of the cutting station, each side of the table 20. Between its horizontal path above the table 20 and the winding mandrel 70, the skeleton 32 'passes over a deflector 74 and a deflection roller 76. The deflector is a bar horizontal extending at least over the width of the table 20 and brought to its ends by plates 78 mounted on the arms 72. The position of the deflector 74 in direction X and in height is adjustable in order to make so that the detachment of the skeleton 32 'relative to the mattress do substantially at the desired location. The horizontal deflection roller 76 is mounted on the arms 72.

Afin d'assurer une bonne découpe des parties 32" du film étanche et leur séparation complète du squelette 32', il est souhaitable que le film 32 soit correctement étalé et de préférence tendu sur le matelas. Aussi, on confère au rouleau de renvoi 40 une forme courbe, ou forme de "banane", comme cela est bien connu dans le domaine textile pour des dispositifs d'étalement de fils ou câbles.To ensure proper cutting of the 32 "parts of the waterproof film and their complete separation from the 32 'skeleton, it is desirable that the film 32 is correctly spread and preferably stretched over the mattress. Also, the deflection roller 40 is given a curved shape, or shape of "banana", as is well known in the textile field for wire or cable spreaders.

La séparation du squelette 32' et sa récupération en dehors du poste de déchargement 16 permettent d'éviter que le déchargement des piles de pièces, ou bûches, découpées dans le matelas, soient gêné par le squelette du film. Les parties du film découpées 32" peuvent être déchargées avec les bûches correspondantes, notamment lorsqu'elles portent des informations d'identification des pièces découpées.The separation of the skeleton 32 'and its recovery outside the unloading station 16 make it possible to prevent the unloading of stacks of parts, or logs, cut from the mattress, are hindered by the skeleton of the film. The parts of the cut film 32 "can be discharged with the corresponding logs, especially when they carry identification information of the cut pieces.

Le poste de déchargement 16 comprend une table recevant le matelas découpé. La table est par exemple constituée par le brin supérieur d'un convoyeur 17 mû en synchronisme avec le convoyeur 22. Entre les convoyeurs 22 et 17, le matelas passe sur un support 19 en forme de peigne.The unloading station 16 includes a table receiving the cut mattress. The table is for example constituted by the strand upper of a conveyor 17 moved in synchronism with the conveyor 22. Between the conveyors 22 and 17, the mattress passes over a support 19 in comb shape.

L'enroulement du squelette 32' sur le mandrin 70 est réalisé de préférence en synchronisme avec l'avance du matelas 30 sur la table 20.The skeleton 32 'is wound on the mandrel 70 is made of preferably in synchronism with the advance of the mattress 30 on the table 20.

Dans le mode de réalisation des Figures 3 et 4, l'asservissement de la vitesse tangentielle d'enroulement sur le mandrin à la vitesse d'avance du matelas est réalisé par accouplement mécanique et système différentiel entre le moteur 28 et le mandrin 70.In the embodiment of Figures 3 and 4, the servo from the tangential winding speed on the mandrel to the speed advance of the mattress is achieved by mechanical coupling and system differential between the motor 28 and the mandrel 70.

Le convoyeur 22 est mû au moyen du moteur 28 par l'intermédiaire d'une chaíne principale 80. Un train d'engrenages 82 reprend cette chaíne principale et transmet son mouvement à une chaíne de renvoi 84. Celle-ci passe sur un pignon récepteur 86 qui est positionné sur l'axe de rotation du mandrin 70 et qui est relié, par l'intermédiaire d'un limiteur de couple 88, à une barre d'embarrage 90 sur laquelle le mandrin 70 est monté. La liaison entre le limiteur de couple 88 et la barre d'embarrage 90 se fait par un palier d'entraínement 92.The conveyor 22 is moved by means of the motor 28 by through a main chain 80. A gear train 82 takes over this main chain and transmits its movement to a chain 84. This passes over a receiving pinion 86 which is positioned on the axis of rotation of the mandrel 70 and which is connected, by means of a torque limiter 88, to a lashing bar 90 on which the mandrel 70 is mounted. The connection between the torque limiter 88 and the bar 90 is made by a drive bearing 92.

En variante, l'asservissement de la vitesse d'enroulement sur le mandrin 70 à la vitesse d'avance du matelas 30 sur la table 20 peut être réalisé par des moyens électroniques, le mandrin étant alors muni de son propre moteur d'entraínement. Ce moteur est commandé par le calculateur 68 à partir de signaux représentatifs de l'avance du convoyeur, par exemple fournis par une roue codée associée à un rouleau sur lequel passe le convoyeur 22.As a variant, the control of the winding speed on the mandrel 70 at the speed of advance of the mattress 30 on the table 20 can be produced by electronic means, the mandrel then being provided with its own drive motor. This motor is controlled by the computer 68 from signals representative of the conveyor advance, for example supplied by a coded wheel associated with a roller on which passes the conveyor 22.

Afin de préserver l'intégrité du squelette 32', il est nécessaire que les découpes faites ne définissent pas de lignes allant de façon continue d'un bord à l'autre du film. Le placement des pièces peut être réalisé de manière à exclure une telle éventualité. Il est possible toutefois et parfois souhaitable de rétablir l'intégrité du squelette dans des zones découpées en déposant ou en formant des attaches sur le film 32, là ou le squelette est coupé. Cela peut être réalisé en déposant sur le film des attaches localisées avant séparation du squelette.In order to preserve the integrity of the 32 'skeleton, it is necessary that the cuts made do not define lines going continuously from one side of the film to the other. Parts can be placed from so as to exclude such a possibility. It is possible however and sometimes desirable to restore skeletal integrity in cut areas by depositing or forming ties on the film 32, there or the skeleton is cut. This can be achieved by placing fasteners on the film located before separation of the skeleton.

Dans le cas où le repérage des bûches par des étiquettes déposées sur les surfaces des parties de film 32" découpées avec les pièces n'est pas effectué, ces parties de film 32" peuvent être solidarisées avec le squelette, dans leurs positions originales. Cette solidarisation est effectuée par la pose ou formation d'attaches localisées ou continues chevauchant le contour de chaque partie de film 32" en plusieurs emplacements de ce contour ou tout le long de ce contour. De la sorte, le film 32 peut être récupéré quasiment dans son intégralité et peut être réutilisé en dépit du fait que son étanchéité peut ne plus être absolue lorsque les attaches sont seulement localisées.If the location of the logs by labels deposited on the surfaces of the 32 "film parts cut with the parts are not made, these 32 "film parts can be joined with the skeleton, in their original positions. This solidarity is performed by placing or forming localized or continuous fasteners overlapping the outline of each part of 32 "film in several locations of this contour or all along this contour. In this way, the film 32 can be recovered almost in its entirety and can be reused despite the fact that its tightness may no longer be absolute when the fasteners are only located.

Différents dispositifs de pose ou formation d'attaches peuvent être utilisés.Different devices for fitting or forming fasteners can be used.

Les Figures 5 et 6 montrent schématiquement un dispositif 100 de dépose d'étiquettes ou pastilles autocollantes 102, qui est monté sur le chariot 52 supportant la tête de coupe, en arrière de l'outil de coupe. Les pastilles 102 sont portées à intervalles réguliers par un ruban 104 dévidé d'un rouleau de stockage 106. Après dépose des pastilles, le ruban est repris par un rouleau de réception 108. Les rouleaux 106 et 108 sont montés rotatifs dans des paliers supportés par le chariot 52.Figures 5 and 6 schematically show a device 100 of removal of labels or self-adhesive discs 102, which is mounted on the carriage 52 supporting the cutting head, behind the cutting tool. The pads 102 are carried at regular intervals by a ribbon 104 unwound of a storage roller 106. After removing the pellets, the ribbon is taken up by a receiving roller 108. The rollers 106 and 108 are rotatably mounted in bearings supported by the carriage 52.

Le ruban 104 portant les pastilles 102 est dévidé du rouleau 106 en passant entre deux galets d'entraínement 110 pressés l'un contre l'autre et mus par un moteur pas-à-pas 112. Ce dernier commande l'avance intermittente du ruban 104 avec des pas correspondant à celui des pastilles 102 sur le ruban. Le réenroulement du ruban nu 104 sur le rouleau 108 est assuré par un moteur (non représenté) relié au rouleau 108 par un limiteur de couple.The ribbon 104 carrying the pellets 102 is unwound from the roll 106 passing between two drive rollers 110 pressed one against the other and powered by a stepper motor 112. The latter controls intermittent advance of ribbon 104 with steps corresponding to that pellets 102 on the ribbon. The rewinding of the bare tape 104 on the roller 108 is provided by a motor (not shown) connected to the roller 108 by a torque limiter.

La dépose des pastilles autocollantes 102 sur le film 32 est réalisée au moyen d'un applicateur 114. Celui-ci est constitué par un vérin dont la tige porte à son extrémité une semelle 116 sur laquelle passe le ruban 104.The removal of the self-adhesive discs 102 on the film 32 is produced by means of an applicator 114. This consists of a jack the upper of which carries a sole 116 at its end over which the ribbon 104.

Le dispositif de dépose 100 est commandé par le calculateur 68 de manière à déposer plusieurs pastilles 102 à cheval sur chaque contour découpé dans le film 32. Un cycle de dépose comprend l'abaissement de l'applicateur 114 pour fixer une pastille par pression sur la surface du film 32, le relèvement de l'applicateur 114 et une avance d'un pas du ruban 104.The depositing device 100 is controlled by the computer 68 so as to deposit several pastilles 102 astride each contour cut from film 32. A deposition cycle involves lowering the applicator 114 for fixing a tablet by pressure on the surface of the film 32, raising the applicator 114 and advancing one step of the tape 104.

Les pastilles peuvent être fixées à intervalles réguliers ou non le long du contour découpé, au fur et à mesure de la découpe. L'application d'une pastille 102 sur le film peut être réalisée alors que le chariot 52 est à l'arrêt, ou à la volée, alors que le chariot 52 se déplace. Dans ce dernier cas, il est préférable que la vitesse du chariot soit relativement réduite. Pour ne pas pénaliser la vitesse de coupe par des arrêts ou ralentissements imposés au chariot 52, on pourra choisir de déposer des pastilles à des instants où, dans le cycle de découpe, le chariot 52 est immobile en X, Y ou se déplace à faible vitesse (interruption de l'avance en fin de contour ou pour le passage d'un angle avec changement de direction brutal, ou ralentissement de l'avance lors de découpe d'une portion de contour délicate, par exemple un cran). Le positionnement du dispositif de dépose immédiatement derrière l'outil lui permet de suivre précisément le contour découpé.The pads can be fixed at regular intervals or not the along the cut contour, as it is cut. The application a patch 102 on the film can be produced while the carriage 52 is at stopping, or on the fly, while the carriage 52 is moving. In this last In this case, it is preferable that the speed of the carriage is relatively reduced. To avoid penalizing the cutting speed with stops or slowdowns imposed on the carriage 52, it will be possible to choose to deposit pellets at times when, in the cutting cycle, the carriage 52 is stationary in X, Y or moves at low speed (interruption of the advance at the end of the contour or for passing an angle with change of brutal direction, or slower advance when cutting a delicate contour portion, for example a notch). The positioning of removal device immediately behind the tool allows it to track precisely the cut contour.

La Figure 7 montre un autre dispositif 120 de formation d'attaches localisées, celui-ci réalisant un soudage localisé du film chevauchant le contour, sous l'effet de la chaleur.Figure 7 shows another device 120 for forming fasteners localized, the latter performing a localized welding of the film overlapping the contour, under the effect of heat.

Le dispositif 120 est monté sur le chariot 52 supportant la tête de coupe, immédiatement en arrière de l'outil de coupe. Il comprend un applicateur 122 sous forme d'un vérin dont la tige porte, à son extrémité, un pied de biche 124, ou semelle, ou poinçon chauffant. Le soudage est réalisé par abaissement de l'applicateur 122 pour amener le pied de biche 124 au contact du film 32.The device 120 is mounted on the carriage 52 supporting the head of cutting, immediately behind the cutting tool. It includes a applicator 122 in the form of a jack, the rod of which carries, at its end, a crowbar 124, or sole, or heating punch. Welding is made by lowering the applicator 122 to bring the presser foot 124 in contact with the film 32.

Comme dans le mode de réalisation précédent, on réalise plusieurs attaches localisées le long de chaque contour découpé, à intervalles réguliers ou non, chaque attache étant de préférence formée lorsque l'avance de l'outil de coupe est interrompue ou ralentie.As in the previous embodiment, we realize several fasteners located along each cut contour, at regular or irregular intervals, each fastener preferably being formed when the cutting tool feed is interrupted or slowed down.

Afin de faciliter le soudage, un produit ayant une fonction de promoteur de soudage peut être déposé sur le film 32. Le dépôt est effectué sur une certaine largeur de part et d'autre du contour découpé, soit de façon continue, soit aux emplacements prévus pour les attaches à réaliser. A cet effet, le chariot 52 porte une buse de pulvérisation 126 reliée à un réservoir (non représenté) par une conduite souple munie d'une électrovanne 128 commandée par le calculateur de l'installation. La buse de pulvérisation 126 est située entre l'outil de coupe (non représenté sur la Figure 7) et l'applicateur 122, ou en avant de l'outil de coupe.In order to facilitate welding, a product having a function of welding promoter can be deposited on the film 32. The deposit is carried out over a certain width on either side of the cut contour, either continuously or at the locations provided for the fasteners achieve. To this end, the carriage 52 carries a spray nozzle 126 connected to a tank (not shown) by a flexible pipe provided a solenoid valve 128 controlled by the installation computer. The spray nozzle 126 is located between the cutting tool (not shown in Figure 7) and the applicator 122, or in front of the cutting tool.

On a envisagé ci-avant des moyens de formation d'attaches localisées en différents emplacements des contours des parties de film découpées.We have considered above means of forming attachments located in different locations of the contours of the film parts cut.

La Figure 8 montre un dispositif 130 permettant la formation d'attaches continues tout le long des contours des parties de film découpées.Figure 8 shows a device 130 for training continuous fasteners along the edges of the film parts cut.

Le dispositif 130 est monté sur le chariot 52 supportant la tête de coupe, immédiatement en arrière de l'outil de coupe. Il comprend un applicateur 132 sous forme d'un vérin dont la tige porte, à son extrémité, un rouleau chauffant 134. L'applicateur 132 est supporté par le chariot 52 par l'intermédiaire d'une platine rotative 135. La platine 135 est commandée en rotation autour de son axe vertical en synchronisme avec le plateau rotatif portant l'outil de coupe.The device 130 is mounted on the carriage 52 supporting the head of cutting, immediately behind the cutting tool. It includes a applicator 132 in the form of a jack whose rod carries, at its end, a heating roller 134. The applicator 132 is supported by the carriage 52 by means of a rotary plate 135. The plate 135 is controlled in rotation about its vertical axis in synchronism with the turntable carrying the cutting tool.

Le soudage est réalisé par pression exercée par le rouleau chauffant 134 sur le film 32 sous l'action de l'applicateur.Welding is carried out by pressure exerted by the roller heating 134 on the film 32 under the action of the applicator.

Afin de faciliter le soudage, un produit ayant une fonction de promoteur de soudage peut être disposé sur le film 32. Le dépôt est effectué sur une certaine largeur de part et d'autre du contour découpé, de façon continue. A cet effet, le chariot 52 porte une buse de pulvérisation 136 reliée à un réservoir (non représenté) par une conduite souple munie d'une électrovanne 138 commandée par le calculateur de l'installation. La buse de pulvérisation est située en avant de l'applicateur 132, devant ou derrière l'outil de coupe.In order to facilitate welding, a product having a function of welding promoter can be placed on the film 32. The deposit is carried out over a certain width on either side of the cut contour, continuously. To this end, the carriage 52 carries a nozzle spray 136 connected to a reservoir (not shown) by a pipe flexible fitted with a solenoid valve 138 controlled by the installation. The spray nozzle is located in front of the applicator 132, in front of or behind the cutting tool.

Il est ainsi possible de reconstituer le film 32 de façon pratiquement parfaite. On notera que, dans les modes de réalisation des Figures 7 et 8, le soudage pourra être réalisé non pas par application d'un élément chauffant mais par projection d'un rayonnement laser.It is thus possible to reconstruct the film 32 so practically perfect. Note that in the embodiments of the Figures 7 and 8, welding can be done not by applying a heating element but by projection of laser radiation.

Dans les modes de réalisation des Figures 5 à 8, le dispositif de dépose ou formation d'attaches est porté par le chariot 52 de support de la tête de coupe. D'autres réalisations peuvent être envisagées dans lesquelles ce dispositif est indépendant de la tête de coupe, ce qui permet d'éviter que la vitesse de coupe soit éventuellement affectée par la pose ou formation des attaches.In the embodiments of Figures 5 to 8, the device removal or formation of fasteners is carried by the carriage 52 for supporting the cutting head. Other realizations can be envisaged in which this device is independent of the cutting head, which allows prevent the cutting speed from being affected by the laying or formation of attachments.

Les Figures 9 et 10 montrent un dispositif 140 conçu pour déposer des bandelettes de film adhésif sur toute la largeur du matelas 30 couvert par le film 32, à l'extrémité aval de la table de coupe, avant décollement du film 32.Figures 9 and 10 show a device 140 designed to apply strips of adhesive film over the entire width of the mattress 30 covered by film 32, at the downstream end of the cutting table, before film peeling 32.

Le dispositif 140 comprend un chariot 142 mobile transversalement, parallèlement à la direction Y, le long d'une poutre 144 ayant une position fixe en direction X, immédiatement en amont du déflecteur 74. Le chariot 142 est guidé par la poutre 144 et est en prise avec une vis sans fin 144a parallèle à la poutre 144 et entraínée par un moteur 146.The device 140 comprises a carriage 142 movable transversely, parallel to direction Y, along a beam 144 having a fixed position in direction X, immediately upstream of the deflector 74. The carriage 142 is guided by beam 144 and is engaged with a screw without end 144a parallel to the beam 144 and driven by a motor 146.

A une extrémité de la poutre 144 est monté un rouleau 148 de film adhésif 150. Le chariot 142 porte un support de pince 152 susceptible de venir en prise latéralement avec le film adhésif 150 et un galet presseur 154. La pince 152 est montée sur son support en étant mobile horizontalement en direction Y entre une position rétractée et une position de préhension, sous la commande d'un actionneur. La pince 152 et le galet 154 sont mobiles verticalement entre une position relevée et une position abaissée en étant fixés aux extrémités des tiges de deux actionneurs respectifs 152a, 154a. En sortie du rouleau de stockage 148, le film adhésif 150 passe successivement entre les lames d'un dispositif de coupe 156 et sous un applicateur 158. Ce dernier est formé par un rouleau mobile verticalement entre une position relevée et une position abaissée en étant fixé à l'extrémité d'un actionneur 158a.At one end of the beam 144 is mounted a roll 148 of adhesive film 150. The carriage 142 carries a clamp support 152 capable of coming into engagement laterally with the adhesive film 150 and a pressure roller 154. The clamp 152 is mounted on its support by being movable horizontally in direction Y between a retracted position and a gripping position, under the control of an actuator. The clamp 152 and the roller 154 are movable vertically between a raised position and a lowered position by being fixed to the ends of the rods of two respective actuators 152 a , 154 a . At the outlet of the storage roller 148, the adhesive film 150 passes successively between the blades of a cutting device 156 and under an applicator 158. The latter is formed by a roller movable vertically between a raised position and a lowered position by being fixed at the end of an actuator 158 a .

Un cycle de dépose d'une bandelette transversale de film adhésif 150 comprend les opérations suivantes. La pince 152, le galet 154 et l'applicateur 158 étant en position relevée, la pince 152 dévide le film 150, en étant en prise avec l'extrémité de celui-ci, par déplacement du chariot 142 dans un sens (aller) sous la commande du moteur 146. Lorsque le film adhésif 150 a été dévidé sur toute la largeur du matelas, au-dessus de celui-ci, la pince 152, le galet 154 et l'applicateur 158 sont abaissés pour amener le film adhésif 150 au contact du film 32. La pince 152 est alors ouverte, rétractée et relevée et le déplacement du chariot 142 est commandé dans l'autre sens (retour) au moyen du moteur 146. Lors de ce trajet retour, le galet presseur en position abaissée applique la bandelette de film adhésif sur le film 32. Lorsque le chariot est revenu en position initiale, la pince 152 est amenée en position de préhension pour saisir le film 150 entre le rouleau 148 et le dispositif de coupe 156. Ensuite, le dispositif de coupe est actionné, et le galet 154 et l'applicateur 158 sont relevés. Un nouveau cycle peut alors être réalisé en déplaçant le chariot 142 sur son trajet aller. A cycle for removing a transverse strip of adhesive film 150 includes the following operations. The clamp 152, the roller 154 and the applicator 158 being in the raised position, the clamp 152 unwinds the film 150, by engaging with the end thereof, by displacement of the carriage 142 in one direction (go) under the control of the motor 146. When the adhesive film 150 has been unwound over the entire width of the mattress, above of it, the clamp 152, the roller 154 and the applicator 158 are lowered to bring the adhesive film 150 into contact with the film 32. The clamp 152 is then open, retracted and raised and the movement of the carriage 142 is controlled in the other direction (return) by means of the 146. motor. this return path, the pressure roller in the lowered position applies the adhesive film strip on the film 32. When the carriage has returned initial position, the clamp 152 is brought into the gripping position to grasp the film 150 between the roller 148 and the cutting device 156. Then, the cutting device is activated, and the roller 154 and the applicator 158 have been identified. A new cycle can then be performed by moving the carriage 142 on its outward journey.

Chaque bandelette de film adhésif est déposée entre deux pas d'avance du matelas. L'intervalle entre bandelettes en direction Y est choisi pour assurer que chaque contour découpé est recouvert par deux bandelettes au moins. Cet intervalle peut être régulier, ou adapté aux dimensions des différents contours en direction Y.Each strip of adhesive film is placed between two steps in advance of the mattress. The interval between strips in direction Y is chosen to ensure that each cut contour is covered by two strips at least. This interval can be regular, or adapted to dimensions of the different contours in direction Y.

Les Figures 11 et 12 montrent encore un autre mode de réalisation d'un dispositif de formation d'attaches localisées. Comme dans le mode de réalisation précédent, ce dispositif 160 est porté par un chariot 162 distinct de celui supportant la tête de coupe.Figures 11 and 12 show yet another mode of creation of a device for training localized attachments. As in the previous embodiment, this device 160 is carried by a carriage 162 separate from that supporting the cutting head.

Le chariot 162 est mobile transversalement, parallèlement à la direction Y, le long d'une poutre 164 ayant une position fixe en direction X, immédiatement en amont du déflecteur 74. Le chariot 162 est guidé par la poutre 164 et est en prise avec une vis sans fin 164a parallèle à la poutre 164 et entraínée par un moteur 166.The carriage 162 is movable transversely, parallel to the direction Y, along a beam 164 having a fixed position in direction X, immediately upstream of the deflector 74. The carriage 162 is guided by the beam 164 and is engaged with an endless screw 164a parallel to the beam 164 and driven by a motor 166.

Le chariot 162 porte une buse de projection 168 reliée à un réservoir pressurisé (non représenté) contenant un matériau promoteur de soudage par une conduite souple 170 munie d'une électrovanne 174. En outre, le chariot 162 porte un miroir 176 destiné à réfléchir vers la surface du film 32 un rayonnement laser produit par un générateur 178 situé d'un côté de l'installation.The carriage 162 carries a projection nozzle 168 connected to a pressurized tank (not shown) containing a promoter material welding by a flexible pipe 170 provided with a solenoid valve 174. In in addition, the carriage 162 carries a mirror 176 intended to reflect towards the surface of the film 32 a laser radiation produced by a generator 178 located in a side of the installation.

La projection du matériau promoteur de soudage peut être réalisée lors du déplacement du chariot 162 dans un sens en direction Y tandis que le soudage est réalisé par échauffement au moyen du rayonnement laser en actionnant le générateur lors du déplacement du chariot 162 dans l'autre sens. Le soudage peut être limité aux zones d'intersection entre les contours et la trajectoire en X du rayonnement laser, par modulation correspondante du rayonnement produit par le générateur.The projection of the welding promoter material can be performed when the carriage 162 is moved in one direction in the Y direction while welding is carried out by heating by means of radiation laser by operating the generator when moving the carriage 162 in the other direction. Welding can be limited to areas of intersection between the contours and the X trajectory of the radiation laser, by corresponding modulation of the radiation produced by the generator.

Les intervalles entre lignes de soudage sont choisis, de la même façon que les intervalles entre bandelettes de film adhésif dans l'exemple précédent, pour que chaque contour soit coupé par au moins deux lignes de soudage.The intervals between welding lines are chosen, in the same way way that the intervals between strips of adhesive film in the example previous, so that each contour is cut by at least two lines welding.

On notera que le chauffage en vue du soudage pourra être réalisé non pas par projection d'un rayonnement laser, mais par application d'un élément chauffant, par exemple un rouleau chauffant porté par le chariot 162. It will be noted that the heating for welding can be carried out not by projection of laser radiation, but by application of a heating element, for example a heating roller carried by the carriage 162.

II a été décrit ci-avant des dispositifs de dépose ou formation d'attaches utiles pour récupérer un film 32 reconstitué.It has been described above of the removal or training devices useful fasteners to recover a reconstituted film 32.

Dans le cas où seul le squelette du film 32 est récupéré, mais doit être muni d'attaches dans des parties découpées, afin de conserver son intégrité, un tel dispositif de dépose ou formation d'attaches localisées peut être utilisé. Le dispositif tel que décrit en référence aux figures 6 et 7 ou à la figure 8 convient plus particulièrement car, par positionnement du chariot 52 en X et Y, il permet de déposer une pastille autocollante ou de former une attache par soudage en un emplacement précis du film 32.In the case where only the skeleton of the film 32 is recovered, but must be fitted with fasteners in cut parts, in order to maintain its integrity, such a device for removing or forming localized fasteners can be used. The device as described with reference to Figures 6 and 7 or in FIG. 8 is more particularly suitable because, by positioning the carriage 52 in X and Y, it allows to deposit a self-adhesive pad or form a fastener by welding at a precise location of the film 32.

Un deuxième mode de réalisation de l'invention est montré par les figures 13 à 17. Ce mode de réalisation se distingue de celui des figures 1 à 4 uniquement par les moyens de récupération des fragments de film d'étanchéité dans la zone d'extrémité aval de la table de coupe. Les autres éléments de l'installation sont communs aux deux modes de réalisation. Ces éléments communs portent les mêmes numéros de référence et ne seront pas à nouveau décrits en détail.A second embodiment of the invention is shown by the Figures 13 to 17. This embodiment differs from that of Figures 1 to 4 only by means of recovery of the film fragments in the downstream end area of the cutting table. The other elements of the installation are common to both modes of production. These common elements have the same reference and will not be described again in detail.

Les fragments du film d'étanchéité 32, c'est à dire le squelette 32' et les parties de film 32" découpées avec les pièces dans le matelas 30, sont prélevés par aspiration à l'extrémité aval de la table de coupe 20 au moyen d'un organe mobile 200 pour être dégagés hors du trajet du matelas et amenés à un dispositif d'évacuation 250.The fragments of the sealing film 32, i.e. the skeleton 32 ' and the parts of film 32 "cut with the parts in the mattress 30, are taken by suction at the downstream end of the cutting table 20 at means of a movable member 200 to be released outside the path of the mattress and brought to an evacuation device 250.

L'organe mobile 200, montré plus en détail sur les figures 15 à 17, est sous forme d'un tambour creux annulaire sectorisé. Il comprend un moyeu 202, une paroi extérieure 204 traversée par une pluralité d'ouvertures 206 et des cloisons radiales 208 qui s'étendent tout le long du tambour entre le moyeu et la paroi extérieure. Les cloisons 208 partagent le tambour en plusieurs secteurs 210. Ceux-ci sont au nombre de six dans l'exemple illustré, mais ce nombre pourra être différent.The movable member 200, shown in more detail in FIGS. 15 to 17, is in the form of a sectored annular hollow drum. It includes a hub 202, an outer wall 204 traversed by a plurality openings 206 and radial partitions 208 that extend all the way drum between the hub and the outer wall. Partitions 208 divide the drum into several sectors 210. These are among six in the example shown, but this number may be different.

Les ouvertures 206 font communiquer chaque secteur avec l'extérieur, à la surface périphérique 205 du tambour, sur toute la longueur de celui-ci. Les ouvertures 206 peuvent avoir la forme de perforations ou de fentes, par exemple de fentes circonférentielles s'étendant sur une partie de la circonférence du tambour, en correspondance avec chaque secteur, comme dans l'exemple illustré.206 openings connect each sector with the outside, at the peripheral surface 205 of the drum, over the entire length of it. The openings 206 may be in the form of perforations or slots, for example circumferential slots extending over a part of the circumference of the drum, corresponding to each sector, as in the example illustrated.

A ses extrémités axiales, les secteurs du tambour 200 sont fermés par des flasques annulaires 212, 214 fixés au tambour. Le tambour 200 est monté sur un axe 216 dont les extrémités sont engagées à travers des ouvertures de platines 218, 220 formant paliers. Le tambour 200 est libre en rotation autour de l'axe 216.At its axial ends, the sectors of the drum 200 are closed by annular flanges 212, 214 fixed to the drum. The drum 200 is mounted on an axis 216, the ends of which are engaged through plate openings 218, 220 forming bearings. The drum 200 is free to rotate about the axis 216.

Le dispositif d'évacuation 250 comprend un bac ou réceptacle de réception 252 fixé aux platines 218, 220, immédiatement en aval du tambour 200. Le bac 252 a une paroi inférieure 254 horizontale, située sensiblement au même niveau que celui des bords inférieurs des platines 218, 220. La paroi 254 est repliée à son extrémité amont pour former un rebord 256 situé en retrait par rapport à la génératrice aval 200b du tambour. A son extrémité aval, la paroi 254 est repliée pour former une paroi aval 258 du bac 252.The evacuation device 250 comprises a tank or receptacle for reception 252 fixed to the plates 218, 220, immediately downstream of the drum 200. The tank 252 has a horizontal bottom wall 254, located substantially at the same level as that of the lower edges of the plates 218, 220. The wall 254 is folded back at its upstream end to form a rim 256 set back from the downstream generator 200b of the drum. At its downstream end, the wall 254 is folded back to form a downstream wall 258 of tank 252.

A ses extrémités, la bac 252 est muni de parois latérales 260, 262. Celles-ci sont fixées sur une patte 264 solidaire des platines 218, 220 et supportent l'ensemble des parois longitudinales 254, 256, 258 du bac.At its ends, the tank 252 is provided with side walls 260, 262. These are fixed on a tab 264 secured to the plates 218, 220 and support all of the longitudinal walls 254, 256, 258 of the tray.

Comme montré seulement sur la figure 14, le dispositif d'évacuation 250 peut comprendre également un système d'extraction par vis sans fin 270. Celle-ci est fixée, avec son moteur d'entraínement 272, sur une des parois latérales 260 du bac de réception 252. Les fragments de film d'étanchéité récupérés dans le bac sont extraits par la vis 270 à travers une ouverture formée dans l'autre paroi latérale 262 et communiquant, par exemple, avec une goulotte 274.As shown only in Figure 14, the device evacuation 250 may also include an extraction system by worm 270. This is fixed, with its drive motor 272, on one of the side walls 260 of the receiving tank 252. The fragments of sealing film recovered in the tank are extracted by the screw 270 to through an opening formed in the other side wall 262 and communicating, for example, with a chute 274.

Les platines 218, 220 supportant le tambour 200 et le dispositif d'évacuation 250 sont montées pivotantes autour d'un axe horizontal sur des supports 222, 224. Ces derniers sont fixés sur le châssis de la table de coupe 20, de chaque côté de celle-ci. Des pivots 226, 228 portés par les supports 222, 224 traversent des ouvertures des platines 218, 220 situées dans les parties inférieures de celles-ci. De la sorte, l'ensemble comprenant le tambour 200 et le bac de réception 252, articulé sur les supports 222, 224 repose par son poids sur le matelas 30 revêtu du film 32. Comme le montre la figure 15, la génératrice inférieure 200a du tambour se situe à un niveau inférieur à celui des bords inférieurs des platines 218, 220, de sorte que le contact entre le tambour 200 et le matelas 30 se fait uniquement le long de la génératrice 200a.The plates 218, 220 supporting the drum 200 and the device 250 are pivotally mounted around a horizontal axis on supports 222, 224. These are fixed to the table frame cutting 20, on each side thereof. Pivots 226, 228 carried by the supports 222, 224 pass through openings in the plates 218, 220 located in the lower parts thereof. In this way, the whole comprising the drum 200 and the receiving tank 252, articulated on the supports 222, 224 rests by its weight on the mattress 30 coated with the film 32. As shown in FIG. 15, the lower generator 200a of the drum is lower than the lower edges of the plates 218, 220, so that the contact between the drum 200 and the mattress 30 is made only along the generator 200a.

L'entraínement en rotation du tambour 200 avec les flasques 212, 214 autour de l'axe 216 est donc réalisé par contact avec le matelas 30 lorsque celui-ci est avancé sous la commande du moteur 28 d'entraínement du convoyeur 22. The rotation drive of the drum 200 with the flanges 212, 214 around the axis 216 is therefore produced by contact with the mattress 30 when this is advanced under the control of the motor 28 conveyor drive 22.

En variante, l'entraínement en rotation du tambour 200 peut être assuré par un dispositif d'entraínement, de préférence débrayable, associé à une motorisation indépendante ou mû au moyen du moteur 28, en synchronisme avec le convoyeur 22. Un contact entre le tambour 200 et le matelas 30 n'est alors pas nécessaire, la surface du tambour peut simplement affleurer celle du matelas.Alternatively, the rotation drive of the drum 200 can be provided by a drive device, preferably disengageable, associated with an independent or driven motorization by means of the motor 28, in synchronism with the conveyor 22. Contact between the drum 200 and the mattress 30 is then not necessary, the surface of the drum can just flush with that of the mattress.

L'un des flasques 212, 214, par exemple le flasque 212 est muni d'ouvertures 234, par exemple circulaires, (Figures 15 et 16) qui sont en nombre égal à celui des secteurs 210 et situées chacune dans le prolongement d'un secteur. La platine 218 qui est au contact, pratiquement sans jeu, avec le flasque 212 présente deux ouvertures ou lumières 236, 238. Des conduites 240, 242 relient les lumières 236, 238 (Figure 15) respectivement à une source de vide et à une source d'air sous pression (non représentées).One of the flanges 212, 214, for example the flange 212 is provided openings 234, for example circular, (Figures 15 and 16) which are in number equal to that of sectors 210 and each located in the extension of a sector. The plate 218 which is in contact, practically free of play, with the flange 212 having two openings or lights 236, 238. Lines 240, 242 connect the lights 236, 238 (Figure 15) respectively to a vacuum source and an air source under pressure (not shown).

Les lumières 236 et 238 s'étendent chacune le long d'un arc avec une ligne centrale située sensiblement sur la même circonférence que les centres des ouvertures 234 et une largeur sensiblement égale à la dimension des ouvertures 234. La lumière 236 s'étend depuis un point 236a situé légèrement en aval de la génératrice 200a du tambour jusqu'à un point 236b situé sensiblement au niveau de la génératrice 200b du tambour. La lumière 238 s'étend depuis un point 238a situé sensiblement à égale distance angulaire de la génératrice 200b et de la génératrice supérieure 200c du tambour jusqu'à un point 238b situé sensiblement au niveau de cette génératrice 200c.The slots 236 and 238 each extend along an arc with a central line located substantially on the same circumference as the centers of the openings 234 and a width substantially equal to the dimension of the openings 234. The slot 236 extends from a point 236 a located slightly downstream of the generator 200 a of the drum to a point 236 b located substantially at the level of the generator 200 b of the drum. The light 238 extends from a point 238 a located substantially at equal angular distance from the generator 200 b and from the upper generator 200 c of the drum to a point 238 b located substantially at the level of this generator 200 c .

De la sorte, lorsque la partie de surface extérieure du tambour correspondant à un secteur (par exemple le secteur 210a de la figure 15) arrive au contact du matelas 30 muni du film 32, une communication est établie entre la source de vide et ce secteur à travers la partie amont de la lumière 236 et l'ouverture 234a correspondant au secteur 210a (zone hachurée sur la figure 15). La surface extérieure du tambour est donc mise en dépression à son arrivée au contact du film 32. Cette mise en dépression est poursuivie jusqu'à ce que l'ouverture 234a cesse d'être en correspondance avec l'extrémité aval 236b de la lumière 236. Les fragments du film d'étanchéité qui ont été aspirés et déviés de la trajectoire du matelas 30 sont alors relâchés. Lorsqu'un secteur (par exemple le secteur 210d de la figure 15) arrive dans une position angulaire dans laquelle une communication est établie entre l'ouverture 234d associée à ce secteur et la lumière 238 (zone hachurée sur la figure 15), une surpression est établie à travers la surface du tambour 200 pour décoller des fragments de film éventuellement restants sur le tambour, en dépit de la coupure préalable de l'aspiration.In this way, when the outer surface part of the drum corresponding to a sector (for example sector 210 a in FIG. 15) comes into contact with the mattress 30 provided with the film 32, communication is established between the vacuum source and this sector through the upstream part of the light 236 and the opening 234 a corresponding to the sector 210 a (hatched area in FIG. 15). The outer surface of the drum is put into depression upon its arrival in contact with the film 32. This depressurization is continued until the opening 234 has ceases to be in correspondence with the downstream end 236 b of the lumen 236. The fragments of the sealing film which have been sucked in and deviated from the path of the mattress 30 are then released. When a sector (for example sector 210 d in FIG. 15) arrives in an angular position in which communication is established between the opening 234 d associated with this sector and the light 238 (hatched area in FIG. 15), an overpressure is established across the surface of the drum 200 in order to peel off any fragments of film which may remain on the drum, despite the prior cut-off of the suction.

La position angulaire des lumières 236, 238 permet de réaliser une aspiration entre le moment où le tambour arrive à proximité du matelas recouvert du film et le moment où le tambour surplombe l'intérieur du bac de réception 252 (la paroi amont 256 de celui-ci étant en amont de la génératrice aval 200b du tambour), et de réaliser un refoulement postérieurement à l'aspiration jusqu'au moment environ où la surface du tambour passe au niveau de la génératrice supérieur 200c. Ainsi, on fait en sorte que les fragments de film aspirés soient bien évacués dans le bac 252.The angular position of the lights 236, 238 makes it possible to carry out a suction between the moment when the drum arrives near the mattress covered with the film and the moment when the drum overhangs the interior of the receiving tank 252 (the upstream wall 256 of the latter. ci being upstream of the downstream generator 200 b of the drum), and of producing a backflow after the suction until about the moment when the surface of the drum passes at the level of the upper generator 200 c . Thus, it is ensured that the fragments of film sucked up are well evacuated in the tank 252.

La distance angulaire entre les points 236b et 238a des lumières 236 et 238 est au moins égale à la dimension angulaire d'une ouverture 234, pour qu'une même ouverture ne se trouve pas simultanément en face des lumières 236, 238. L'intervalle angulaire maximum entre le début du refoulement et la fin du refoulement, ou entre le début de l'aspiration et la fin de l'aspiration, déterminent l'angle maximum de chaque secteur et donc le nombre minimum de ceux-ci. En pratique, ce nombre minimum est égal à 4, de préférence à 5. On notera aussi que des fragments de film d'étanchéité pouvant être de petites dimensions, dans certaines configurations de coupe, la densité des ouvertures 206 à la surface du tambour doit être assez élevée. Dans le cas de fentes circonférentielles, comme dans l'exemple illustré, le pas entre fentes est choisi entre 5 mm et 20 mm environ.The angular distance between points 236 b and 238 a of lights 236 and 238 is at least equal to the angular dimension of an opening 234, so that the same opening is not simultaneously opposite the lights 236, 238. L The maximum angular interval between the start of the discharge and the end of the discharge, or between the start of the suction and the end of the suction, determines the maximum angle of each sector and therefore the minimum number thereof. In practice, this minimum number is equal to 4, preferably to 5. It will also be noted that fragments of sealing film which may be of small dimensions, in certain cutting configurations, the density of the openings 206 on the surface of the drum must to be quite high. In the case of circumferential slots, as in the example illustrated, the pitch between slots is chosen between approximately 5 mm and 20 mm.

On notera aussi que le refoulement par surpression des fragments de film prélevés par le tambour rotatif peut ne pas être nécessaire.It will also be noted that the discharge by overpressure of the film fragments removed by the rotating drum may not be necessary.

Les Figures 18 à 20 illustrent une variante de réalisation de l'installation des figures 13 à 17, la différence résidant dans la forme de réalisation du dispositif d'évacuation.Figures 18 to 20 illustrate an alternative embodiment of the installation of Figures 13 to 17, the difference being in the form of realization of the evacuation device.

Dans l'installation des Figures 18 à 20, l'évacuation des fragments de film d'étanchéité est réalisée par transfert à travers une conduite d'évacuation 290 entre un bac de réception 280 et un dispositif de récupération 292, les fragments de film étant par exemple recueillis dans un chariot 294.In the installation of Figures 18 to 20, the evacuation of the fragments of sealing film is made by transfer through a pipe outlet 290 between a receiving tank 280 and a recovery 292, the film fragments being for example collected in a carriage 294.

Le bac de réception 280 a une forme de hotte qui s'ouvre à sa partie inférieure à proximité immédiate de la surface du tambour 200. L'ouverture 282 de la hotte 280 s'étend sensiblement depuis immédiatement avant la fin de la zone d'aspiration jusqu'à la fin de la zone de refoulement (schématisées sur la Figure 20).The receiving tray 280 has a form of hood which opens at its lower part in close proximity to the surface of the drum 200. The opening 282 of the hood 280 extends substantially from immediately before the end of the suction zone until the end of the zone delivery (shown schematically in Figure 20).

Les fragments de film d'étanchéité recueillis dans la hotte 280 sont propulsés par l'air sous pression utilisé pour le refoulement, pour parvenir jusqu'au dispositif de récupération 292, à travers la conduite 290.The fragments of sealing film collected in the hood 280 are propelled by pressurized air used for delivery, to reach the recovery device 292, through line 290.

Claims (47)

  1. A method of automatically cutting up sheet material (30), the method being of the type comprising bringing at least one ply of sheet material (30) onto a cutting-out table (20), holding the sheet material (30) against the table (20) by suction, applying a sealing film (32) against the surface of the sheet material (30), cutting out pieces of predetermined shapes by means of a tool (60) passing through the sealing film (32) and through the sheet material (30), and removing cut-out pieces downstream from the cutting-out table (20);
       said method being characterised in that at least the skeleton (32') of the sealing film (32) is diverted from the path of the sheet material (30) in a downstream end zone of the table (20) so as to be recovered automatically, separately from the cut-out pieces.
  2. A method according to claim 1, characterised in that at least the skeleton (32') of the sealing film (32) is recovered by automatically winding it back up.
  3. A method according to claim 2, characterised in that the winding back up is performed on a roll core (70) at a tangential speed which is servo-controlled to the speed at which the sheet material (30) moves over the cutting-out table (20).
  4. A method according to any one of claims 1 to 3, characterised in that the pieces are cut out while maintaining the structural integrity of the skeleton (32') of the sealing film (32).
  5. A method according to any one of claims 1 to 4, characterised in that it comprises depositing or forming fastenings connecting the skeleton (32') of the sealing film (32) to at least certain portions (32") of the sealing film that are cut out with the pieces.
  6. A method according to claim 5, characterised in that it further comprises depositing or forming fastenings connecting the skeleton (32') of the sealing film (32) to each of the portions (32") of the sealing film (32) that are cut out with the pieces from the sheet material (30), so as to recover a sealing film (32) that is substantially re-constructed.
  7. A method according to claim 5 or 6, characterised in that fastenings are deposited in the form of self-adhesive elements (102) along the outlines of the portions (32") of the sealing film (32) that are cut out with the pieces.
  8. A method according to claim 5 or 6, characterised in that the fastenings are formed by heat-sealing the sealing film along the outlines of the portions of the sealing film (32) that are cut out with the pieces.
  9. A method according to claim 8, characterised in that, prior to the heat-sealing, a heat-sealing enhancer material is deposited on the sealing film (32).
  10. A method according to claim 8 or 9, characterised in that the heat-sealing is performed by applying a heater element (124, 134).
  11. A method according to claim 8 or 9, characterised in that the heat-sealing is performed by projecting laser radiation.
  12. A method according to any one of claims 5 to 11, characterised in that the fastenings are formed in localized manner at various locations along the outlines of the portions (32") of the sealing film (32) that are cut out with the pieces.
  13. A method according to any one of claims 5 to 11, characterised in that the fastenings are formed continuously along the outlines of the portions (32") of the sealing film (32) that are cut out with the pieces.
  14. A method according to any one of claims 5 to 13, characterised in that the fastenings are deposited or formed immediately after the cutting-out, by following the path of the cutting-out tool (60).
  15. A method according to claim 5 or 6, characterised in that localized fastenings are formed by fixing strips of adhesive film (150) to the sealing film (32), in the transverse direction relative to the path of the sheet material (30), after cutting out the pieces and before diverting the sealing film (32) from the path of the sheet material (30).
  16. A method according to any one of claims 8 to 11, characterised in that localized fastenings are formed in the form of heat-seal lines in the transverse direction relative to the path of the sheet material (30), after cutting out the pieces and before diverting the sealing film (32) from the path of the sheet material (30).
  17. A method according to claim 1, characterised in that fragments of the sealing film (32) constituted by the skeleton (32') and portions (32") of the film that are cut out with the pieces are taken off by being sucked out of the path of the sheet material (30), and are then removed.
  18. A method according to claim 17, characterised in that the fragments of film are taken off by means of a moving member (200) adjacent to the path of the sheet material.
  19. A method according to claim 18, characterised in that the moving member (200) is rotated by means of it coming into contact with the sheet material (30) and of said sheet material being advanced.
  20. A method according to claim 18 or 19, characterised in that a rotary moving member (200) is used that comprises a plurality of sectors (210), and suction is established in each sector (210) while said sector is moving from a location situated in the vicinity of the path of the sheet material (30) and a film fragment removal zone (32).
  21. A method according to claim 20, characterised in that positive pressure is established in each sector (210) when it reaches the removal zone.
  22. A method according to any one of claims 17 to 21, characterised in that the fragments of film (32) are removed by being deposited in a collector (252) situated above the path of the sheet material (30), and by being extracted from said collector.
  23. A method according to any one of claims 17 to 22, characterised in that the fragments of film (32) are removed by being brought to a removal duct (290).
  24. A method according to any one of claims 1 to 16, characterised in that the sealing film (32) is spread out over the sheet material (30).
  25. An installation for automatically cutting up sheet material, the installation comprising a cutting-out table (20), a loading station (12) for loading sheet material to be cut-up at an upstream end of the cutting-out table (20), an unloading station (16) for unloading cut-out pieces at a downstream end of the cutting-out table, suction means (24, 26) for establishing suction at the surface of the cutting-out table, and feed means (34, 40, 42) for bringing a flexible sealing film (32) to the vicinity of the upstream end of the cutting-out table (20);
       said installation being characterised in that it further comprises means (74, 70, 200, 250, 280) for separating at least a skeleton (32') of sealing film (32) from the path of the sheet material in the vicinity of the downstream end of the cutting-out table (20) and for recovering it automatically outside of the unloading station (16) for unloading the cut-out pieces.
  26. An installation according to claim 25, characterised in that it comprises winding-up means (70) for winding up at least the skeleton (32') of the sealing film (32).
  27. An installation according to claim 26, comprising advancing means (28) for advancing the sheet material (30) over the cutting-out table (20), said installation being characterised in that said winding-up means (70) are connected to the advancing means (28) by a mechanical link (80) serving to servo-control the tangential winding-up speed to the speed of advance over the cutting-out table (20).
  28. An instailation accorring to claim 26, comprising advancing means (28) for advancing the sheet material (30) over the cutting-out table (20), said installation being characterised in that the winding-up means (70) are provided with a specific motor, the control of which is servo-controlled to the speed of advance over the cutting-out table (20).
  29. An installation according to any one of claims 18 to 28, characterised in that it comprises a device (100; 120; 130; 140; 160) for depositing or forming fastenings at the surface of the sealing film (32), on the cutting-out table (20).
  30. An installation according to claim 29, characterised in that the device (120; 130; 160) for forming fastenings comprises heat-sealing means (124, 134, 176, 178) for heat-sealing the sealing film (32).
  31. An installation according to claim 30, characterised in that the heat-sealing means comprise a heater element (124; 134) and means (122; 132) for applying the heater element (124, 134) against the surface of the sealing film (32).
  32. An installation according to claim 31, comprising a cutting-out head (50) mounted on a carriage (52) mounted to move above the cutting-out table (20), said installation being characterised in that the heater element (124, 134) is mounted on said carriage (52).
  33. An installation according to claim 29, characterised in that the heat-sealing means (176, 178) comprise means (176) for projecting laser radiation onto the surface of the sealing film (32).
  34. An installation according to any one of claims 30 to 33, characterised in that it comprises means (126, 136, 168) for spraying a heat-sealing enhancer material onto the surface of the sealing film (32).
  35. An installation according to claim 29, characterised in that the device (100; 140) for laying fastenings comprises means (116, 154) for applying adhesive elements (102) onto the sealing film (32).
  36. An installation according to claim 35, characterised in that the device (100) for laying fastenings comprises means for applying self-adhesive patches (102).
  37. An installation according to claim 36, comprising a cutting-out head (50) mounted on a carriage (52) mounted to move above the cutting-out table (20), said installation being characterised in that the means for applying self-adhesive patches (102) are carried by said carriage (52).
  38. An installation according to claim 35, characterised in that the device (140) for laying fastenings comprises means (154) for applying strips of adhesive film (150) transversely relative to the advance of the flexible sheet material (30).
  39. An installation according to claim 25, characterised in that it comprises means (200) for taking off fragments of sealing film by suction in the vicinity of the downstream end of the cutting-out table, and means (250; 280) for removing taken-off fragments of film.
  40. An installation according to claim 39, characterised in that the means (200) for taking off fragments of sealing film by suction comprise a rotary drum (200) having a plurality of sectors (210) which communicate with the outside via orifices opening out in the surface of the drum, and means (236, 240) for putting the sectors under suction over a portion of their rotary path between a location situated in the vicinity of the plane of the cutting-out table (20) and a location situated in the vicinity of the means (250; 280) for removing fragments of film (32).
  41. An installation according to claim 40, characterised in that the drum (200) is adjacent, at at least one of its axial ends, to a fixed plate (218) provided with at least one orifice (236) for coupling to a vacuum source.
  42. An installation according to claim 40 or 41, characterised in that it further comprises means (238, 242) for putting the sectors under positive pressure over a portion of their rotary path, at least at the level of the removal means (250; 280).
  43. An installation according to claim 42, characterised in that the drum (200) is adjacent, at at least one of its axial ends, to a fixed plate (218) provided with at least one orifice (238) for coupling to a pressurized air source.
  44. An installation according to any one of claims 40 to 43, characterised in that the drum (200) is mounted to be free to rotate, so that the drum is rotated by means of contact with its surface.
  45. An installation according to any one of claims 39 to 44, characterised in that the means (250, 280) for removing fragments of film comprise a collector bin (252) situated above the plane of the cutting-out table (20) and means (270) for extracting fragments of film from the collector.
  46. An installation according to any one of claims 39 to 44, characterised in that the means for removing fragments of film comprise a duct (280, 290) which is connected to an opening (282) situated above the plane of the cutting-out table (20) for collecting the sucked-up fragments of film.
  47. An installation according to any one of claims 25 to 46, characterised in that it further comprises means (40) for spreading out the airtight film (32) over the sheet material (30).
EP99942987A 1998-09-16 1999-09-16 Automatic cutting of pieces in a sheet material Expired - Lifetime EP1045746B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9811541A FR2783191B1 (en) 1998-09-16 1998-09-16 AUTOMATIC CUTTING OF PARTS IN SHEET MATERIAL
FR9811541 1998-09-16
PCT/FR1999/002206 WO2000015397A1 (en) 1998-09-16 1999-09-16 Automatic cutting of pieces in a sheet material

Publications (2)

Publication Number Publication Date
EP1045746A1 EP1045746A1 (en) 2000-10-25
EP1045746B1 true EP1045746B1 (en) 2002-07-17

Family

ID=9530482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99942987A Expired - Lifetime EP1045746B1 (en) 1998-09-16 1999-09-16 Automatic cutting of pieces in a sheet material

Country Status (6)

Country Link
US (2) US6521074B1 (en)
EP (1) EP1045746B1 (en)
DE (1) DE69902140T2 (en)
ES (1) ES2179673T3 (en)
FR (1) FR2783191B1 (en)
WO (1) WO2000015397A1 (en)

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CN103948198A (en) * 2014-03-28 2014-07-30 湖北欣意无纺布特种制品有限公司 Automatic manufacturing machine for non-woven Y-shaped belts
EP4126483B1 (en) * 2020-03-26 2023-08-23 Gerber Technology LLC Overlay sheet tensioner apparatus

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JP4451739B2 (en) * 2004-07-30 2010-04-14 株式会社島精機製作所 Suction type mounting table sealing device
DE602005014223D1 (en) 2005-07-15 2009-06-10 Emanuela Guerriero Method for laying out and cutting limp sheet material
CA2561465A1 (en) * 2006-09-25 2008-03-25 David Crowther Vacuum pressure work piece holding device for a saw
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KR100934462B1 (en) * 2007-07-04 2009-12-30 주식회사 엘지화학 Foundation frame of high foundation efficiency
KR100948969B1 (en) * 2007-07-16 2010-03-23 주식회사 엘지화학 Process for Preparing Rectangular Pieces at High Cutting Efficiency
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CN103948198A (en) * 2014-03-28 2014-07-30 湖北欣意无纺布特种制品有限公司 Automatic manufacturing machine for non-woven Y-shaped belts
EP4126483B1 (en) * 2020-03-26 2023-08-23 Gerber Technology LLC Overlay sheet tensioner apparatus

Also Published As

Publication number Publication date
ES2179673T3 (en) 2003-01-16
FR2783191B1 (en) 2000-12-15
US7024976B2 (en) 2006-04-11
US6521074B1 (en) 2003-02-18
US20030121610A1 (en) 2003-07-03
EP1045746A1 (en) 2000-10-25
FR2783191A1 (en) 2000-03-17
WO2000015397A1 (en) 2000-03-23
DE69902140D1 (en) 2002-08-22
DE69902140T2 (en) 2003-03-20

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