EP2160346B1 - Machine for cutting out designs printed on a substrate in the form of a web wound on a reel - Google Patents

Machine for cutting out designs printed on a substrate in the form of a web wound on a reel Download PDF

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Publication number
EP2160346B1
EP2160346B1 EP20080802918 EP08802918A EP2160346B1 EP 2160346 B1 EP2160346 B1 EP 2160346B1 EP 20080802918 EP20080802918 EP 20080802918 EP 08802918 A EP08802918 A EP 08802918A EP 2160346 B1 EP2160346 B1 EP 2160346B1
Authority
EP
European Patent Office
Prior art keywords
cutting
web
conveyor belt
roller
axis
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.)
Not-in-force
Application number
EP20080802918
Other languages
German (de)
French (fr)
Other versions
EP2160346A1 (en
Inventor
Didier Dubesset
Eric Vilain
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.)
Grafitroniks
Original Assignee
Grafitroniks
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Filing date
Publication date
Application filed by Grafitroniks filed Critical Grafitroniks
Publication of EP2160346A1 publication Critical patent/EP2160346A1/en
Application granted granted Critical
Publication of EP2160346B1 publication Critical patent/EP2160346B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • 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
    • B26D7/20—Cutting beds
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/10—Advancing webs by a feed band against which web is held by fluid pressure, e.g. suction or air blast
    • 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
    • Y10T83/2196—Roller[s]
    • 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
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/654—With work-constraining means on work conveyor [i.e., "work-carrier"]
    • 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
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6579—With means to press work to work-carrier
    • 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
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/664—Roller
    • Y10T83/6648—Continuous conveying during, cutting; e.g., straw cutting
    • 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
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/664—Roller
    • Y10T83/6649—Supporting work at cutting station
    • Y10T83/6651—Comprising part of cutting station

Definitions

  • the invention is in the field of handling web materials applied to the field of printing, and more particularly applied to cutting machines printed patterns on such a material. It relates to a cutting machine a strip-shaped and roll-packaged printing medium, which is arranged to separate patterns printed on the support from a tape scroll against a moving cutting tool. .
  • a support which consists of a sheet or the like shaped web and packaged in roll.
  • the strip, on which the patterns are printed beforehand, is driven from a reel to a movable cutting tool, against which the tape scrolls to separate the previously printed patterns from the latter.
  • cutting machines mainly consisting of a loading station comprising the reel, an upstream conveyance station of the web to a cutting station comprising the cutting tool and its mobility means , and a downstream conveyor station of the band to an unloading station where the cut patterns are recovered and where the remainder of tape is evacuated.
  • the belt is driven by motor means comprising at least one rotary drive roller placed at the unloading station and around which the band is wound, possibly motorized roller trains being placed at the longitudinal edge of the strip and / or transversely to its direction of travel for its guidance and positioning between the various stations.
  • the cutting machine is structurally the simplest possible and as small a footprint as possible to reduce its cost of obtaining and to facilitate its installation on site, or even its use.
  • the means used to achieve a reliable and precise cutting patterns are likely to be complex, with the consequence of affecting the simplicity of structure, small size and ease of use of the machine. It comes out for designers looking for a compromise between these constraints.
  • the quality of the positioning and the drive of the belt between the loading and unloading stations must allow a reliable and precise cutting of the patterns. It is necessary that the conditioning roller of the belt is not only correctly positioned with respect to the general axis of progression of the belt, but also that the conditions of driving of the belt guarantee a maintenance in position of the latter according to this axis.
  • the modes of relating and relative mobility between the band and the cutting tool are also critical, and it is desirable that the cutting operation is performed as quickly as possible for patterns whose contour to be cut is likely to to be geometrically complex. Another difficulty lies in the treatment of the reasons after their separation from the band and their collection at the unloading station.
  • the machine is organized from a vertical extension chassis. It is common that such a chassis is organized in a trolley and that the modalities of operation of the machine are reduced to simplify its structure and limit its size.
  • Such a machine is particularly intended to treat a type of printing medium of cellular material, plastic material or similar printing medium, a thickness of the order of less than one millimeter.
  • Such a cutting machine currently uses the principle of cutting "half-flesh", which consists in partially slicing the band in depth to allow maintenance patterns on the band despite the cutting of their outline.
  • the printing medium is formed of at least two layers comprising the printed sheet and a pattern retaining substrate which are joined to each other by an adhesive film.
  • the strip cutting operation is to slice the sheet by preserving the retaining substrate and then removing the patterns from this retaining substrate.
  • the reel and the drive roll are respectively placed at the rear and the front of the frame, while the cutting station is placed at the top of the frame.
  • a martyr rule placed at the cutting station constitutes the counter-support member for the cutting tool.
  • Such a machine offers the advantages of being inexpensive and of reduced floor space, of being easily installed on site, allowing its quick and easy implementation from simplified adjustment operations, and of limiting the magnitude and frequency of maintenance operations. However, these advantages are provided to the detriment of the quality and precision of the cutting patterns obtained, or do not allow cutting patterns whose contour is geometrically complex.
  • the machine is organized from a horizontal extension frame arranged in a table.
  • a machine makes it possible to treat not only a printing medium of small thickness but nevertheless of rigidity offering a uniform natural hold, but also printing media that can be flexible and low natural hold in their plan, such as textiles, and / or supports thick print.
  • Such a cutting machine commonly exploits the principle of "full flesh” cutting, which consists in completely slicing the strip in depth until isolating the reasons for the remainder of tape.
  • the table provides a support and guide surface for the web through a martyred conveyor belt, which is closed in a loop on itself and which is provided with means of the vacuum type to adhere the web to the web. its surface.
  • Such adhesion makes it possible to maintain the strip in its general plane at the cutting station, and to retain the cut patterns until they are collected at the unloading station.
  • the tape runs on the table top and the cutting tool is able to move in a plane parallel to the plate to cut patterns whose contour is geometrically complex.
  • Such a machine promotes maintenance and effective training of the band in its general plan regardless of its weight and / or its thickness, and allows to freely organize the mobility conditions of the cutting tool to maximize the possibilities offered by cutting of the band.
  • the operating modes of the machine induce a large footprint of the ground table, and a complexity of the means implemented with consequent costs of obtaining and maintenance of the machine crippling for low print media thickness of the type of cellular material, plastic material or analogous printing medium.
  • the object of the present invention is to propose a machine for cutting printed patterns on a support formed a roll-wrapped band, which offers a satisfactory compromise between the various constraints that have been set forth. It is more particularly targeted by the present invention to provide such a cutting machine which is of a simple structure, a small footprint and easy operation to implement, but which nevertheless allows to make reliable accuracy and the speed of the cutting of the patterns, including for patterns whose contour is geometrically complex.
  • the machine of the present invention is arranged to cut printed patterns on a support formed of a packaged web roll.
  • This machine is of the type comprising a vertical extension frame provided with a base for resting on the ground. It will be understood that this frame is oriented so as to circulate the band in a substantially vertical orientation corresponding to that of extension of the machine, or by analogy more or less inclined. It will be noted that a result sought for such vertical expansion cutting machines lies in a reduction in their footprint on the ground, from a displacement of the band in a plane as close as possible to verticality.
  • the machine comprises for the conveyance of the band, means for driving the latter along a progression axis corresponding to the unrolling extension of the band.
  • These drive means use at least one motorized roller arranged transversely to the axis of progression of the strip to circulate to a cutting station interposed between a loading station arranged in a reel of the strip and an unloading station for evacuation of the strip after cutting.
  • the cutting station uses a cutting tool which is movable along two axes of maneuver, composed of a first axis of maneuver corresponding to the depth of the band for its slicing and a second axis of maneuvering aligned transversely to the axis of progression.
  • the cutting operation is carried out according to a contour assigned to at least one pattern to be cut, taking place from a combination of movement between the circulation of the strip along the axis of progression and the movement of the tool cutting along the second axis of mobility.
  • a machine of the above-mentioned kind is mainly recognizable in that the drive means implement a conveyor belt closed in a loop on itself, which is provided with means for adhering the strip to its outer surface. .
  • This conveyor belt is engaged on at least one drive roller, being closed loop on itself.
  • the loop conveyor belt extends interposed between the loading station and the unloading station, which are placed on either side of the large side faces of the frame.
  • the large lateral faces of the frame are mainly defined by the large lateral faces of the conveyor belt, and the vertical orientation of the frame corresponds to a transverse orientation, and in particular vertical or similar, of its large lateral faces relative to the rest plane of the frame. on the ground.
  • the loop closure of the conveyor belt is carried out from the engagement of the conveyor belt on at least a first drive roller, and on a second roller which is indifferently a second drive roller or a return roller of the conveyor belt idly mounted on the frame.
  • the band is maintained and driven through its surface corresponding to the adhesion surface offered by the conveyor belt, to reinforce its maintenance in its general plane despite the monodirectional antagonistic mobility of the tool of section along its second axis of mobility.
  • the closing of the loop conveyor belt and its orientation in verticality or the like makes it possible to use one and the other of its large lateral faces to hold the strip, with the advantage of reinforcing this holding for a vertical extension of the carpet. conveyor as small as possible.
  • the limitation of the unidirectional mobility of the cutting tool which simplifies the methods of use of the machine and which simplifies its structure, does not induce inaccuracy in the cutting performed.
  • the band is held by plating against the outer surface of the conveyor belt, which is used for the cutting tool of a martyr member adapted to allow a cut in full flesh of the band and to prevent slipping and / or possible wrinkling of the latter despite the monodirectional displacement of the cutting tool transversely to the axis of progression of the strip.
  • the organization of the means for holding and driving the belt conveyor belt makes it easy to arrange such holding and driving means to be able to cut patterns in a contour of complex geometric shape, from an alternating movement imparted to the conveyor belt which makes it possible to move the strip alternately on either side of the second axis of maneuver of the cutting tool for the cutting of such an outline.
  • the conveyor belt is advantageously a drive member of the belt back and forth relative to its position at the base of the second axis of mobility of the tool. chopped off. More particularly, the conveyor belt is advantageously operable by the drive roller in the two opposite directions corresponding to the axis of progression of the belt, so that from a driving of the drive roller selectively following the one or the other of its directions of rotation, the conveyor belt is alternately displaced in the said opposite directions.
  • the drive roller is preferably placed at the cutting station to form a counter-support member for the cutting tool. It will be understood that the cutting tool preferably moves along its second axis of mobility in a direction parallel to a generatrix of the drive roller, while being slightly offset relative thereto along the axis of progression of the belt for avoid injuring the drive roller.
  • This driving roller is preferably used to form a return roller participating in the looping of the conveyor belt.
  • the adhesion means may be of any type, such as vacuum type or electrostatic type, for example.
  • the conveyor belt is for example formed from a porous and / or microperforated textile, such as based on mixed fibers or the like, conferring on it a permeability ability to the air.
  • the conveyor belt is in connection with means for energizing, and is for example formed from a plastic material loaded with particles to make it conductive.
  • the conveyor belt is permeable to air and is in aeraulic communication with a vacuum chamber formed by the frame.
  • This room depression is advantageously defined between at least two remote return rollers on which the conveyor belt is closed in a loop on itself, and a pair of end flanges which are constitutive of the frame and on which are mounted the return rollers so mobile in rotation.
  • the return rollers are preferably constituted by a first drive roller allowing a passage of the depression through it, and by at least a second return roller indifferently consisting of a drive roller or a guide roller. mounted crazy on the chassis.
  • the loop closure of the carpet is preferably arranged in two large substantially parallel lateral faces, to limit the lateral size of the machine.
  • the first deflection roller is placed at the top of the chassis being overhung by the cutting station; the second return roller is impervious to air to prohibit the passage of the depression, and is disposed at the base of the frame in the vicinity of which is placed the unloading station.
  • the lateral size of the machine is restricted to a dimension of the diameter of the largest return roller.
  • the second roller is placed at the unloading station and is impervious to air to form a unit of separation of the patterns with respect to the band, from their natural fall to the unloading station.
  • the unloading station is preferably provided with a roll of collection of the remaining band.
  • This collection roll is disposed downstream of the impermeable roll in the direction of circulating the web between the loading station and the unloading station, and preferably a container or the like for collecting the patterns following their natural fall.
  • the collection roller is in particular a motorized roller, whose rotation is controlled in correspondence with the rotation of the drive roller, being incidentally equipped with means for holding the belt under tension to compensate for any deviations in diameter resulting from the progressive winding of the remaining band around the collection roller.
  • the cutting station is optionally equipped with a train of pressure rollers of the band against the conveyor belt against the support that the latter takes against a counter-support member, to reinforce the maintenance of the band in its plane. general at the cutting station.
  • This counter-support member is constituted in particular by the first return roller.
  • a machine is intended to cut patterns 1 in full flesh in a band 2 forming a printing medium for these patterns 1.
  • This cutting machine comprises a frame 3 oriented vertically and provided at its base with a base 4 of rest on the ground.
  • the frame 3 carries, in rotationally movable manner about horizontal axes, different rollers 8, 9 which are intended to guide and / or drive the strip 2 as it passes between a loading station 5 arranged in a reel 6, and unloading station 7.
  • These loading and unloading stations 5 are arranged on either side of the large vertical lateral faces of the chassis 3, and at the base of the latter, ie close to the base 4.
  • the rollers 8, 9 are oriented transversely with respect to the vertical axis A1 of progression of the strip unwinding between the loading station 5 and the unloading station 7, the latter being provided with a collection roller 10 of the remainder of the strip 2 after separation of the patterns 1.
  • the unwinding axis A1 is orthogonal to the horizontal axes A4 of the rollers.
  • a cutting station 11 is disposed at the top of the frame 3 and is provided with a cutting tool 12 which is operable along a first axis of mobility A2 to the strip 2 for slicing.
  • the cutting of the patterns 1 is made from a combination of movements between the displacement of the strip 2 along its axis of progression A1 and a maneuver of the cutting tool 12 along a second axis of horizontal mobility A3 which is oriented transversely to the axis of progression Al of the strip 2 and parallel to the axes A4 of extension of the rollers 8, 9.
  • the maintenance and the driving of the strip 2 along its axis of progression A1 are carried out by means of a conveyor belt 13 which is closed in a loop on itself by means of a pair of return rollers 8 9.
  • a first deflection roller is placed at the top of the machine and constitutes a motorized drive roller 8 of the conveyor belt 13 along the axis of progression A1 of the belt 2.
  • This first return roller 8 is placed opposite of the cutting tool 12 to form a support member for the latter during the cutting operation.
  • the first return roller 8 is a drive roller which can be rotated on itself in both directions, to allow driving of the conveyor belt 13 and thus of the web 2 along the opposite directions corresponding to the axis of progression A1 of the web 2.
  • This mobility in two opposite directions of progress of the conveyor belt 13 makes it possible to move the band 2 in a reciprocating movement to the plumb with the cutting tool 12, to allow a cutting of patterns 1 whose cutout contour which is assigned to them is likely to present a complex geometric shape.
  • the second return roller 9 is a guide roller of the conveyor belt 13, which is rotatably mounted on the frame 3 and which is placed at the base of the machine, in the area of the unloading station 7.
  • the outer surface of the conveyor belt 13 is made adherent for the maintenance by plating of the strip 2 thanks to its breathable design and its connection with vacuum means (not shown in detail). This vacuum is obtained from a vacuum of a vacuum chamber 14 formed in the frame 3.
  • Vacuum generating means 17 are placed in communication with the vacuum chamber 14, either by being housed inside the latter or by being placed outside the vacuum chamber 14 and being in aeraulic communication with that as shown diagrammatically.
  • the vacuum chamber 14 is delimited between the two large lateral faces of the conveyor belt 13, by the drive roller 8 which is permeable to air for the passage of the vacuum through the conveyor belt and by the second roller 9 of closing the conveyor belt 13.
  • End flanges 15 carried by the frame 3 are placed at the ends of the rollers 8, 9 to confine the internal volume of the vacuum chamber 14.
  • the second return roller 9 is airtight to prohibit a passage therethrough of the depression produced inside the vacuum chamber 14, and thus a passage of the depression through the conveyor belt 13 in the zone the unloading station.
  • the remaining band 2 is recovered by the collection roll 10, while the patterns 1 are capable of being collected by an operator or to be recovered inside a container or the like.
  • the machine comprises, at the cutting station 11, a set of pressure rollers 16, to reinforce the plating of the band 2 against the conveyor belt 13 in the mobility zone of the cutting tool 12 along its second axis of mobility A3.
  • various return rollers of the web 2 may be installed to guide the unwinding of the latter between the loading station 5 and the unloading station 7, and in particular to bring the web 2 in contact against the conveyor belt 13 in a manner that optimized adhesion surface.
  • the loop closure of the conveyor belt 13 is advantageously made so as to form a profile having two large parallel vertical side faces, to reduce the lateral size of the machine to a dimension of the order of the diameter of the largest return roller 8 9.
  • this loop closure of the conveyor belt 13 is made according to any profile.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Details Of Cutting Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Advancing Webs (AREA)
  • Control Of Cutting Processes (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

A machine for cutting out patterns (1) printed on a substrate in the form of a web (2) wound on a reel, extends vertically and has web (2) driving elements using a belt conveyor (13) which runs in a vertically oriented closed loop. This conveyor belt (13) offers an optimized adhesion surface based on the use of its two large lateral faces and is placed between a loading station (5) and an unloading station (7) installed on either sides of the lateral faces of the conveyor belt (13).

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention est du domaine de la manipulation des matériaux en bande appliquée au domaine de l'impression, et plus particulièrement appliquée aux machines à découper des motifs imprimés sur un tel matériau. Elle a pour objet une machine à découper un support d'impression conformé en bande et conditionné en rouleau, qui est organisée pour séparer des motifs imprimés sur le support à partir d'un défilement de la bande au regard d'un outil de coupe mobile.The invention is in the field of handling web materials applied to the field of printing, and more particularly applied to cutting machines printed patterns on such a material. It relates to a cutting machine a strip-shaped and roll-packaged printing medium, which is arranged to separate patterns printed on the support from a tape scroll against a moving cutting tool. .

Etat de la techniqueState of the art

Dans le domaine de l'impression, il est commun d'imprimer sur un support des motifs, puis de découper ces motifs pour les séparer de ce support. Il est plus particulièrement connu d'utiliser un support qui est constitué d'une feuille ou analogue conformée en bande et conditionnée en rouleau. La bande, sur laquelle sont préalablement imprimés les motifs, est entraînée depuis un dévidoir vers un outil de coupe mobile, au regard duquel la bande défile pour séparer de cette dernière les motifs préalablement imprimés. A cet effet, il est connu des machines à découper principalement constituées d'un poste de chargement comprenant le dévidoir, d'un poste d'acheminement amont de la bande vers un poste de découpe comprenant l'outil de coupe et ses moyens de mobilité, et un poste d'acheminement aval de la bande vers un poste de déchargement où sont récupérés les motifs découpés et où est évacué le reliquat de bande. Pour permettre à l'outil de coupe de trancher la bande, celle-ci circule au poste de découpe entre l'outil de coupe et un organe de contre appui. La bande est entraînée par des moyens moteurs comprenant au moins un rouleau d'entraînement rotatif placé au poste de déchargement et autour duquel s'enroule la bande, des trains de galets éventuellement motorisés étant placés en bordure longitudinale de la bande et/ou transversalement à son sens de défilement pour son guidage et son positionnement entre les différents postes.In the field of printing, it is common to print on a support patterns, then to cut these patterns to separate them from this support. It is more particularly known to use a support which consists of a sheet or the like shaped web and packaged in roll. The strip, on which the patterns are printed beforehand, is driven from a reel to a movable cutting tool, against which the tape scrolls to separate the previously printed patterns from the latter. For this purpose, it is known cutting machines mainly consisting of a loading station comprising the reel, an upstream conveyance station of the web to a cutting station comprising the cutting tool and its mobility means , and a downstream conveyor station of the band to an unloading station where the cut patterns are recovered and where the remainder of tape is evacuated. To allow the cutting tool to cut the strip, it travels to the cutting station between the cutting tool and a counter-support member. The belt is driven by motor means comprising at least one rotary drive roller placed at the unloading station and around which the band is wound, possibly motorized roller trains being placed at the longitudinal edge of the strip and / or transversely to its direction of travel for its guidance and positioning between the various stations.

D'une manière générale, il est souhaitable que la machine à découper soit structurellement la plus simple possible et d'un encombrement le plus faible possible pour réduire son coût d'obtention et pour faciliter son installation sur site, voire aussi son utilisation. Cependant, les moyens mis en oeuvre pour parvenir à une découpe fiable et précise des motifs sont susceptibles d'être complexes, avec pour conséquence d'affecter ces simplicité de structure, faiblesse d'encombrement et aisance d'utilisation de la machine. Il en ressort pour les concepteurs la recherche d'un compromis entre ces contraintes.In general, it is desirable that the cutting machine is structurally the simplest possible and as small a footprint as possible to reduce its cost of obtaining and to facilitate its installation on site, or even its use. However, the means used to achieve a reliable and precise cutting patterns are likely to be complex, with the consequence of affecting the simplicity of structure, small size and ease of use of the machine. It comes out for designers looking for a compromise between these constraints.

La qualité du positionnement et de l'entraînement de la bande entre les postes de chargement et de déchargement doit permettre une découpe fiable et précise des motifs. Il est nécessaire que le rouleau de conditionnement de la bande soit non seulement correctement positionné par rapport à l'axe général de progression de la bande, mais aussi que les conditions d'entraînement de la bande garantissent un maintien en position de cette dernière suivant cet axe. Les modalités de mise en relation et de mobilité relative entre la bande et l'outil de coupe sont aussi déterminantes, et il est souhaitable que l'opération de découpe soit effectuée le plus rapidement possible pour des motifs dont le contour à découper est susceptible d'être géométriquement complexe. Une autre difficulté réside dans le traitement des motifs après leur séparation de la bande et leur collecte au poste de déchargement.The quality of the positioning and the drive of the belt between the loading and unloading stations must allow a reliable and precise cutting of the patterns. It is necessary that the conditioning roller of the belt is not only correctly positioned with respect to the general axis of progression of the belt, but also that the conditions of driving of the belt guarantee a maintenance in position of the latter according to this axis. The modes of relating and relative mobility between the band and the cutting tool are also critical, and it is desirable that the cutting operation is performed as quickly as possible for patterns whose contour to be cut is likely to to be geometrically complex. Another difficulty lies in the treatment of the reasons after their separation from the band and their collection at the unloading station.

Selon une première approche favorisant une structure simple et de faible encombrement, telle que divulguée par le document EP 0 494 484 la machine est organisée à partir d'un châssis d'extension verticale. Il est commun qu'un tel châssis soit organisé en chariot et que les modalités de fonctionnement de la machine soient réduites pour simplifier sa structure et limiter son encombrement. Une telle machine est notamment destinée à traiter un support d'impression de type en matériau cellulaire, matériau plastique ou support d'impression analogue, d'une épaisseur de l'ordre inférieure au millimètre. Une telle machine à découper exploite couramment le principe de découpe à « mi-chair », qui consiste à trancher partiellement la bande en profondeur pour permettre un maintien des motifs sur la bande malgré le découpage de leur contour. Plus particulièrement, le support d'impression est formé d'au moins deux couches comprenant la feuille imprimée et un substrat de retenue des motifs qui sont joints l'un à l'autre par une pellicule adhésive. L'opération de découpe de la bande consiste à trancher la feuille en préservant le substrat de retenue, puis à retirer les motifs de ce substrat de retenue. Le dévidoir et le rouleau d'entraînement sont respectivement placés à l'arrière et à l'avant du châssis, tandis que le poste de découpe est placé au sommet du châssis. Une règle martyr placée au poste de découpe constitue l'organe de contre appui pour l'outil de coupe. Une telle machine offre les avantages d'être peu coûteuse et d'un encombrement au sol réduit, de pouvoir être facilement installée sur site en permettant sa mise en oeuvre rapide et aisée à partir d'opérations de réglage simplifiées, et de limiter l'ampleur et la fréquence des opérations de maintenance. Cependant, ces avantages sont procurés au détriment de la qualité et de la précision de la découpe des motifs obtenue, voire ne permettent pas une découpe de motifs dont le contour est géométriquement complexe.According to a first approach favoring a simple structure and small footprint, as disclosed by the document EP 0 494 484 the machine is organized from a vertical extension chassis. It is common that such a chassis is organized in a trolley and that the modalities of operation of the machine are reduced to simplify its structure and limit its size. Such a machine is particularly intended to treat a type of printing medium of cellular material, plastic material or similar printing medium, a thickness of the order of less than one millimeter. Such a cutting machine currently uses the principle of cutting "half-flesh", which consists in partially slicing the band in depth to allow maintenance patterns on the band despite the cutting of their outline. More particularly, the printing medium is formed of at least two layers comprising the printed sheet and a pattern retaining substrate which are joined to each other by an adhesive film. The strip cutting operation is to slice the sheet by preserving the retaining substrate and then removing the patterns from this retaining substrate. The reel and the drive roll are respectively placed at the rear and the front of the frame, while the cutting station is placed at the top of the frame. A martyr rule placed at the cutting station constitutes the counter-support member for the cutting tool. Such a machine offers the advantages of being inexpensive and of reduced floor space, of being easily installed on site, allowing its quick and easy implementation from simplified adjustment operations, and of limiting the magnitude and frequency of maintenance operations. However, these advantages are provided to the detriment of the quality and precision of the cutting patterns obtained, or do not allow cutting patterns whose contour is geometrically complex.

Selon une deuxième approche favorisant une découpe fiable et précise du support d'impression, y compris pour un support d'impression d'épaisseur importante, la machine est organisée à partir d'un châssis d'extension horizontale agencé en table. Une telle machine permet de traiter non seulement un support d'impression de faible épaisseur mais néanmoins d'une rigidité offrant une tenue naturelle homogène, mais aussi des supports d'impression susceptibles d'être souples et de faible tenue naturelle dans leur plan, tel que des textiles, et/ou des supports d'impression épais. Une telle machine à découper exploite couramment le principe de découpe à « pleine chair », qui consiste à trancher totalement la bande en profondeur jusqu'à isoler les motifs du reliquat de bande. La table offre une surface d'appui et de guidage de la bande par l'intermédiaire d'un tapis convoyeur martyr, qui est refermé en boucle sur lui-même et qui est muni de moyens du type à dépression pour faire adhérer la bande à sa surface. Une telle adhérence permet de maintenir la bande dans son plan général au poste de découpe, et de retenir les motifs découpés jusqu'à leur collecte au poste de déchargement. La bande défile sur le plateau de la table et l'outil de coupe est susceptible de se déplacer dans un plan parallèle au plateau pour découper des motifs dont le contour est géométriquement complexe. Une telle machine favorise un maintien et un entraînement efficace de la bande dans son plan général quels que soient son poids et/ou son épaisseur, et permet d'organiser librement les conditions de mobilité de l'outil de coupe pour optimiser les possibilités offertes de découpage de la bande. Cependant, les modalités de fonctionnement de la machine induisent un encombrement important de la table au sol, et une complexité des moyens mis en oeuvre avec en conséquence des coûts d'obtention et de maintenance de la machine rédhibitoires pour des supports d'impression de faible épaisseur du type en matériau cellulaire, matériau plastique ou support d'impression analogue.According to a second approach favoring a reliable and accurate cutting of the print medium, including for a thick print medium, the machine is organized from a horizontal extension frame arranged in a table. Such a machine makes it possible to treat not only a printing medium of small thickness but nevertheless of rigidity offering a uniform natural hold, but also printing media that can be flexible and low natural hold in their plan, such as textiles, and / or supports thick print. Such a cutting machine commonly exploits the principle of "full flesh" cutting, which consists in completely slicing the strip in depth until isolating the reasons for the remainder of tape. The table provides a support and guide surface for the web through a martyred conveyor belt, which is closed in a loop on itself and which is provided with means of the vacuum type to adhere the web to the web. its surface. Such adhesion makes it possible to maintain the strip in its general plane at the cutting station, and to retain the cut patterns until they are collected at the unloading station. The tape runs on the table top and the cutting tool is able to move in a plane parallel to the plate to cut patterns whose contour is geometrically complex. Such a machine promotes maintenance and effective training of the band in its general plan regardless of its weight and / or its thickness, and allows to freely organize the mobility conditions of the cutting tool to maximize the possibilities offered by cutting of the band. However, the operating modes of the machine induce a large footprint of the ground table, and a complexity of the means implemented with consequent costs of obtaining and maintenance of the machine crippling for low print media thickness of the type of cellular material, plastic material or analogous printing medium.

Objet de l'inventionObject of the invention

Le but de la présente invention est de proposer une machine à découper des motifs imprimés sur un support formé d'une bande conditionnée en rouleau, qui offre un compromis satisfaisant entre les différentes contraintes qui ont été énoncées. Il est plus particulièrement visé par la présente invention de proposer une telle machine à découper qui soit d'une structure simple, d'un faible encombrement au sol et d'une exploitation aisée à mettre en oeuvre, et qui permette néanmoins de fiabiliser la précision et la rapidité du découpage des motifs, y compris pour des motifs dont le contour est de forme géométriquement complexe.The object of the present invention is to propose a machine for cutting printed patterns on a support formed a roll-wrapped band, which offers a satisfactory compromise between the various constraints that have been set forth. It is more particularly targeted by the present invention to provide such a cutting machine which is of a simple structure, a small footprint and easy operation to implement, but which nevertheless allows to make reliable accuracy and the speed of the cutting of the patterns, including for patterns whose contour is geometrically complex.

La machine de la présente invention est organisée pour découper des motifs imprimés sur un support formé d'une bande conditionnée en rouleau. Cette machine est du genre comprenant un châssis d'extension verticale munie d'un piètement pour son repos au sol. On comprendra que ce châssis est orienté de manière à faire circuler la bande suivant une orientation sensiblement verticale correspondante à celle d'extension de la machine, voire par analogie de manière plus ou moins inclinée. On notera qu'un résultat recherché pour de telles machines à découper d'extension verticale réside dans une réduction de leur encombrement au sol, à partir d'un déplacement de la bande suivant un plan le plus proche possible de la verticalité. La machine comprend pour l'acheminement de la bande, des moyens d'entraînement de cette dernière suivant un axe de progression correspondant à l'extension en déroulement de la bande. Ces moyens d'entraînement mettent en oeuvre au moins un rouleau motorisé disposé transversalement à l'axe de progression de la bande pour la faire circuler vers un poste de découpe interposé entre un poste de chargement agencé en dévidoir de la bande et un poste de déchargement pour l'évacuation de la bande après sa découpe. Le poste de découpe met en oeuvre un outil de coupe qui est mobile suivant deux axes de manoeuvre, composés d'un premier axe de manoeuvre correspondant à la profondeur de la bande pour son tranchage et d'un deuxième axe de manoeuvre aligné transversalement à l'axe de progression. L'opération de découpe est réalisée suivant un contour affecté à au moins un motif à découper, en s'effectuant à partir d'une combinaison de mouvement entre la circulation de la bande suivant l'axe de progression et le déplacement de l'outil de coupe suivant le deuxième axe de mobilité. On notera une caractéristique des machines à découper du type à extension verticale en ce que l'outil de coupe est manoeuvrable pour suivre le contour du motif à découper suivant une trajectoire monodirectionnelle exclusivement alignée sur un axe parallèle à la génératrice du rouleau d'entraînement, en combinaison avec le déplacement par défilement de la bande au poste de découpe suivant son axe de progression. Ces dispositions visent à proposer une machine de structure simple, notamment au regard de l'organisation de la mobilité de l'outil de coupe, et d'un encombrement au sol réduit.The machine of the present invention is arranged to cut printed patterns on a support formed of a packaged web roll. This machine is of the type comprising a vertical extension frame provided with a base for resting on the ground. It will be understood that this frame is oriented so as to circulate the band in a substantially vertical orientation corresponding to that of extension of the machine, or by analogy more or less inclined. It will be noted that a result sought for such vertical expansion cutting machines lies in a reduction in their footprint on the ground, from a displacement of the band in a plane as close as possible to verticality. The machine comprises for the conveyance of the band, means for driving the latter along a progression axis corresponding to the unrolling extension of the band. These drive means use at least one motorized roller arranged transversely to the axis of progression of the strip to circulate to a cutting station interposed between a loading station arranged in a reel of the strip and an unloading station for evacuation of the strip after cutting. The cutting station uses a cutting tool which is movable along two axes of maneuver, composed of a first axis of maneuver corresponding to the depth of the band for its slicing and a second axis of maneuvering aligned transversely to the axis of progression. The cutting operation is carried out according to a contour assigned to at least one pattern to be cut, taking place from a combination of movement between the circulation of the strip along the axis of progression and the movement of the tool cutting along the second axis of mobility. It will be noted a characteristic of cutting machines of the vertical extension type in that the cutting tool is operable to follow the contour of the pattern to be cut along a one-way path exclusively aligned on an axis parallel to the generatrix of the drive roller, in combination with the scrolling movement of the strip at the cutting station along its axis of progression. These provisions are intended to provide a machine of simple structure, particularly with regard to the organization of the mobility of the cutting tool, and reduced footprint.

Selon la présente invention, une machine du genre susvisé est principalement reconnaissable en ce que les moyens d'entraînement mettent en oeuvre un tapis convoyeur refermé en boucle sur lui-même, qui est muni de moyens d'adhérence de la bande à sa surface extérieure. Ce tapis convoyeur est en prise sur au moins un rouleau d'entraînement, en étant refermé en boucle sur lui-même. Le tapis convoyeur conformé en boucle s'étend en interposition entre le poste de chargement et le poste de déchargement, qui sont placés de part et d'autre des grandes faces latérales du châssis.According to the present invention, a machine of the above-mentioned kind is mainly recognizable in that the drive means implement a conveyor belt closed in a loop on itself, which is provided with means for adhering the strip to its outer surface. . This conveyor belt is engaged on at least one drive roller, being closed loop on itself. The loop conveyor belt extends interposed between the loading station and the unloading station, which are placed on either side of the large side faces of the frame.

Les grandes faces latérales du châssis sont principalement définies par les grandes faces latérales du tapis convoyeur, et l'orientation verticale du châssis correspond à une orientation transversale, et notamment verticale ou assimilée, de ses grandes faces latérales par rapport au plan de repos du châssis au sol. La fermeture en boucle du tapis convoyeur est réalisée à partir de la mise en prise du tapis convoyeur sur au moins un premier rouleau d'entraînement, et sur un second rouleau qui est indifféremment un second rouleau d'entraînement ou un rouleau de renvoi du tapis convoyeur monté fou sur le châssis.The large lateral faces of the frame are mainly defined by the large lateral faces of the conveyor belt, and the vertical orientation of the frame corresponds to a transverse orientation, and in particular vertical or similar, of its large lateral faces relative to the rest plane of the frame. on the ground. The loop closure of the conveyor belt is carried out from the engagement of the conveyor belt on at least a first drive roller, and on a second roller which is indifferently a second drive roller or a return roller of the conveyor belt idly mounted on the frame.

Il résulte de ces dispositions que la bande est maintenue et entraînée par l'intermédiaire de sa surface correspondante à la surface d'adhérence offerte par le tapis convoyeur, pour conforter son maintien dans son plan général malgré la mobilité antagoniste monodirectionnelle de l'outil de coupe suivant son deuxième axe de mobilité. La fermeture du tapis convoyeur en boucle et son orientation en verticalité ou assimilée permet d'exploiter l'une et l'autre de ses grandes faces latérales pour le maintien de la bande, avec pour avantage de conforter ce maintien pour une extension verticale du tapis convoyeur la plus réduite possible.It follows from these provisions that the band is maintained and driven through its surface corresponding to the adhesion surface offered by the conveyor belt, to reinforce its maintenance in its general plane despite the monodirectional antagonistic mobility of the tool of section along its second axis of mobility. The closing of the loop conveyor belt and its orientation in verticality or the like makes it possible to use one and the other of its large lateral faces to hold the strip, with the advantage of reinforcing this holding for a vertical extension of the carpet. conveyor as small as possible.

La limitation de la mobilité monodirectionnelle de l'outil de coupe, qui simplifie les modalités d'utilisation de la machine et qui permet de simplifier sa structure, n'induit pas d'imprécision au découpage réalisée. La bande est maintenue par placage contre la surface extérieure du tapis convoyeur, qui fait office pour l'outil de coupe d'un organe martyr apte à autoriser une découpe en pleine chair de la bande et à interdire le glissement et/ou un éventuel froissement de cette dernière malgré le déplacement monodirectionnel de l'outil de coupe transversalement à l'axe de progression de la bande.The limitation of the unidirectional mobility of the cutting tool, which simplifies the methods of use of the machine and which simplifies its structure, does not induce inaccuracy in the cutting performed. The band is held by plating against the outer surface of the conveyor belt, which is used for the cutting tool of a martyr member adapted to allow a cut in full flesh of the band and to prevent slipping and / or possible wrinkling of the latter despite the monodirectional displacement of the cutting tool transversely to the axis of progression of the strip.

L'organisation des moyens de maintien et d'entraînement de la bande en tapis convoyeur permet d'agencer aisément de tels moyens de maintien et d'entraînement pour pouvoir pratiquer un découpage de motifs suivant un contour de forme géométrique complexe, à partir d'un mouvement alternatif conféré au tapis convoyeur qui permet de déplacer la bande alternativement de part et d'autre du deuxième axe de manoeuvre de l'outil de coupe pour le découpage d'un tel contour.The organization of the means for holding and driving the belt conveyor belt makes it easy to arrange such holding and driving means to be able to cut patterns in a contour of complex geometric shape, from an alternating movement imparted to the conveyor belt which makes it possible to move the strip alternately on either side of the second axis of maneuver of the cutting tool for the cutting of such an outline.

Le tapis convoyeur constitue avantageusement un organe d'entraînement de la bande en va et vient au regard de sa position à l'aplomb du deuxième axe de mobilité de l'outil de coupe. Plus particulièrement, le tapis convoyeur est avantageusement manoeuvrable par le rouleau d'entraînement suivant les deux directions opposées correspondantes à l'axe de progression de la bande, de sorte qu'à partir d'une manoeuvre du rouleau d'entraînement sélectivement suivant l'un ou l'autre de ses sens de rotation, le tapis convoyeur est alternativement déplacé suivant les dites directions opposées.The conveyor belt is advantageously a drive member of the belt back and forth relative to its position at the base of the second axis of mobility of the tool. chopped off. More particularly, the conveyor belt is advantageously operable by the drive roller in the two opposite directions corresponding to the axis of progression of the belt, so that from a driving of the drive roller selectively following the one or the other of its directions of rotation, the conveyor belt is alternately displaced in the said opposite directions.

Le rouleau d'entraînement est de préférence placé au poste de découpe pour constituer un organe de contre appui pour l'outil de coupe. On comprendra que l'outil de coupe se déplaçant préférentiellement suivant son deuxième axe de mobilité suivant une direction parallèle à une génératrice du rouleau d'entraînement, tout en étant légèrement décalé par rapport à ce dernier suivant l'axe de progression de la bande pour éviter de blesser le rouleau d'entraînement. Ce rouleau d'entraînement est de préférence exploité pour constituer un rouleau de renvoi participant de la mise en boucle du tapis convoyeur.The drive roller is preferably placed at the cutting station to form a counter-support member for the cutting tool. It will be understood that the cutting tool preferably moves along its second axis of mobility in a direction parallel to a generatrix of the drive roller, while being slightly offset relative thereto along the axis of progression of the belt for avoid injuring the drive roller. This driving roller is preferably used to form a return roller participating in the looping of the conveyor belt.

Les moyens d'adhérence sont susceptibles d'être d'un type quelconque, tel que du type à dépression ou du type électrostatique par exemple. Dans le cas de moyens d'adhérence du type à dépression, le tapis convoyeur est par exemple formé à partir d'un textile poreux et/ou microperforé, tel qu'à base de fibres mêlées ou analogues, lui conférant une aptitude de perméabilité à l'air.The adhesion means may be of any type, such as vacuum type or electrostatic type, for example. In the case of vacuum-type adhesion means, the conveyor belt is for example formed from a porous and / or microperforated textile, such as based on mixed fibers or the like, conferring on it a permeability ability to the air.

Dans le cas de moyens d'adhérence du type électrostatique, le tapis convoyeur est en relation avec des moyens de mise sous tension électrique, et est par exemple formé à partir d'un matériau plastique chargé de particules pour le rendre conducteur.In the case of adhesion means of the electrostatic type, the conveyor belt is in connection with means for energizing, and is for example formed from a plastic material loaded with particles to make it conductive.

Selon un exemple de réalisation, dans lequel les moyens d'adhérence sont du type à dépression, le tapis convoyeur est perméable à l'air et est en communication aéraulique avec une chambre à dépression ménagée par le châssis. Cette chambre à dépression est avantageusement délimitée entre au moins deux rouleaux de renvoi distants sur lesquels le tapis convoyeur est refermé en boucle sur lui-même, et un couple de flasques d'extrémité qui sont constitutifs du châssis et sur lesquels sont montés les rouleaux de renvoi de manière mobile en rotation.According to an exemplary embodiment, wherein the adhesion means are of the vacuum type, the conveyor belt is permeable to air and is in aeraulic communication with a vacuum chamber formed by the frame. This room depression is advantageously defined between at least two remote return rollers on which the conveyor belt is closed in a loop on itself, and a pair of end flanges which are constitutive of the frame and on which are mounted the return rollers so mobile in rotation.

Les rouleaux de renvoi sont de préférence constitués par un premier rouleau d'entraînement autorisant un passage de la dépression à son travers, et par au moins un second rouleau de renvoi indifféremment constitué d'un rouleau d'entraînement ou d'un rouleau de guidage monté fou sur le châssis. La fermeture en boucle du tapis est de préférence agencée en deux grandes faces latérales sensiblement parallèles, pour limiter l'encombrement latéral de la machine.The return rollers are preferably constituted by a first drive roller allowing a passage of the depression through it, and by at least a second return roller indifferently consisting of a drive roller or a guide roller. mounted crazy on the chassis. The loop closure of the carpet is preferably arranged in two large substantially parallel lateral faces, to limit the lateral size of the machine.

Plus particulièrement, le premier rouleau de renvoi est placé au sommet du châssis en étant surplombé par le poste de découpe ; le second rouleau de renvoi est imperméable à l'air pour interdire le passage de la dépression, et est disposé à la base du châssis au voisinage de laquelle est placé le poste de déchargement. L'encombrement latéral de la machine est restreint à une dimension de l'ordre du diamètre du plus grand rouleau de renvoi. Les motifs découpés en pleine chair sont maintenus par le tapis convoyeur malgré leur séparation de la bande, et sont spontanément retirés de cette dernière au poste de déchargement à partir de leur chute naturelle provoquée par l'absence d'adhérence du tapis convoyeur dans la zone du second rouleau de renvoi imperméable à l'air.More particularly, the first deflection roller is placed at the top of the chassis being overhung by the cutting station; the second return roller is impervious to air to prohibit the passage of the depression, and is disposed at the base of the frame in the vicinity of which is placed the unloading station. The lateral size of the machine is restricted to a dimension of the diameter of the largest return roller. The patterns cut in the flesh are maintained by the conveyor belt despite their separation from the band, and are spontaneously removed from the latter at the unloading station from their natural fall caused by the lack of adhesion of the conveyor belt in the area the second impervious backing roll.

Plus particulièrement, le second rouleau est placé au poste de déchargement et est imperméable à l'air pour constituer un organe de séparation des motifs par rapport à la bande, à partir de leur chute naturelle au poste de déchargement.More particularly, the second roller is placed at the unloading station and is impervious to air to form a unit of separation of the patterns with respect to the band, from their natural fall to the unloading station.

Le poste de déchargement est de préférence doté d'un rouleau de collecte du reliquat de bande. Ce rouleau de collecte est disposé en aval du rouleau imperméable dans le sens de circulation de la bande entre le poste de chargement et le poste de déchargement, et de préférence d'un conteneur ou analogue pour la collecte des motifs consécutivement à leur chute naturelle. On notera que le rouleau de collecte est notamment un rouleau motorisé, dont la mise en rotation est commandée en correspondance avec la mise en rotation du rouleau d'entraînement, en étant accessoirement équipé de moyens de maintien sous tension de la bande pour compenser les éventuels écarts de diamètre résultant de l'enroulement progressif du reliquat de bande autour du rouleau de collecte.The unloading station is preferably provided with a roll of collection of the remaining band. This collection roll is disposed downstream of the impermeable roll in the direction of circulating the web between the loading station and the unloading station, and preferably a container or the like for collecting the patterns following their natural fall. It will be noted that the collection roller is in particular a motorized roller, whose rotation is controlled in correspondence with the rotation of the drive roller, being incidentally equipped with means for holding the belt under tension to compensate for any deviations in diameter resulting from the progressive winding of the remaining band around the collection roller.

Le poste de découpe est optionnellement équipé d'un train de galets presseurs de la bande contre le tapis convoyeur à l'encontre de l'appui que prend ce dernier contre un organe de contre appui, pour conforter le maintien de la bande dans son plan général au poste de découpe. Cet organe de contre appui est notamment constitué par le premier rouleau de renvoi.The cutting station is optionally equipped with a train of pressure rollers of the band against the conveyor belt against the support that the latter takes against a counter-support member, to reinforce the maintenance of the band in its plane. general at the cutting station. This counter-support member is constituted in particular by the first return roller.

Description de la figureDescription of the figure

La présente invention sera mieux comprise à la lecture de la description qui va en être faite en relation avec la figure unique de la planche annexée, qui illustre schématiquement en perspective une machine à découper selon un exemple de réalisation de la présente invention.The present invention will be better understood on reading the description which will be made in connection with the single figure of the attached plate, which schematically illustrates in perspective a cutting machine according to an embodiment of the present invention.

Sur la figure, une machine est destinée à découper des motifs 1 en pleine chair dans une bande 2 formant support d'impression pour ces motifs 1.In the figure, a machine is intended to cut patterns 1 in full flesh in a band 2 forming a printing medium for these patterns 1.

Cette machine à découper comporte un châssis 3 orienté verticalement et muni à sa base d'un piètement 4 de repos au sol. Le châssis 3 porte, de manière mobile en rotation autour d'axes horizontaux, différents rouleaux 8, 9 qui sont destinés à guider et/ou à entraîner la bande 2 lors de son déroulement entre un poste de chargement 5 agencé en dévidoir 6, et un poste de déchargement 7.This cutting machine comprises a frame 3 oriented vertically and provided at its base with a base 4 of rest on the ground. The frame 3 carries, in rotationally movable manner about horizontal axes, different rollers 8, 9 which are intended to guide and / or drive the strip 2 as it passes between a loading station 5 arranged in a reel 6, and unloading station 7.

Ces postes de chargement 5 et de déchargement 7 sont disposés de part et d'autre des grandes faces latérales verticales du châssis 3, et à la base de ce dernier, c'est à dire à proximité du piètement 4.These loading and unloading stations 5 are arranged on either side of the large vertical lateral faces of the chassis 3, and at the base of the latter, ie close to the base 4.

Les rouleaux 8, 9 sont orientés transversalement par rapport à l'axe vertical A1 de progression de la bande en déroulement entre le poste de chargement 5 et le poste de déchargement 7, ce dernier étant pourvu d'un rouleau de collecte 10 du reliquat de bande 2 après séparation des motifs 1. L'axe A1 de déroulement est orthogonal aux axes horizontaux A4 des rouleaux.The rollers 8, 9 are oriented transversely with respect to the vertical axis A1 of progression of the strip unwinding between the loading station 5 and the unloading station 7, the latter being provided with a collection roller 10 of the remainder of the strip 2 after separation of the patterns 1. The unwinding axis A1 is orthogonal to the horizontal axes A4 of the rollers.

Un poste de découpe 11 est disposé au sommet du châssis 3 et est muni d'un outil de coupe 12 qui est manoeuvrable suivant un premier axe de mobilité A2 vers la bande 2 pour son tranchage. Le découpage des motifs 1 est réalisé à partir d'une combinaison de mouvements entre le déplacement de la bande 2 suivant son axe de progression Al et une manoeuvre de l'outil de coupe 12 suivant un deuxième axe de horizontal de mobilité A3 qui est orienté transversalement à l'axe de progression Al de la bande 2 et parallèlement aux axes A4 d'extension des rouleaux 8, 9.A cutting station 11 is disposed at the top of the frame 3 and is provided with a cutting tool 12 which is operable along a first axis of mobility A2 to the strip 2 for slicing. The cutting of the patterns 1 is made from a combination of movements between the displacement of the strip 2 along its axis of progression A1 and a maneuver of the cutting tool 12 along a second axis of horizontal mobility A3 which is oriented transversely to the axis of progression Al of the strip 2 and parallel to the axes A4 of extension of the rollers 8, 9.

Le maintien et l'entraînement de la bande 2 suivant son axe de progression A1 sont réalisés par l'intermédiaire d'un tapis convoyeur 13 qui est refermé en boucle sur lui-même par l'intermédiaire d'un couple de rouleaux de renvoi 8, 9. Un premier rouleau de renvoi est placé au sommet de la machine et constitue un rouleau motorisé d'entraînement 8 du tapis convoyeur 13 suivant l'axe de progression A1 de la bande 2. Ce premier rouleau de renvoi 8 est placé en regard de l'outil de coupe 12 pour constituer un organe de contre appui pour ce dernier lors de l'opération de découpage.The maintenance and the driving of the strip 2 along its axis of progression A1 are carried out by means of a conveyor belt 13 which is closed in a loop on itself by means of a pair of return rollers 8 9. A first deflection roller is placed at the top of the machine and constitutes a motorized drive roller 8 of the conveyor belt 13 along the axis of progression A1 of the belt 2. This first return roller 8 is placed opposite of the cutting tool 12 to form a support member for the latter during the cutting operation.

Le premier rouleau de renvoi 8 est un rouleau d'entraînement qui est peut être entraîne en rotation sur lui-même suivant les deux sens, pour permettre un entraînement du tapis convoyeur 13 et donc de la bande 2 suivant l'une et l'autre des directions opposées correspondantes à l'axe de progression A1 de la bande 2. Cette mobilité à deux directions opposées de progression du tapis convoyeur 13 permet de déplacer la bande 2 selon un mouvement de va et vient à l'aplomb de l'outil de coupe 12, pour permettre un découpage de motifs 1 dont le contour à découper qui leur est affecté est susceptible de présenter une forme géométrique complexe.The first return roller 8 is a drive roller which can be rotated on itself in both directions, to allow driving of the conveyor belt 13 and thus of the web 2 along the opposite directions corresponding to the axis of progression A1 of the web 2. This mobility in two opposite directions of progress of the conveyor belt 13 makes it possible to move the band 2 in a reciprocating movement to the plumb with the cutting tool 12, to allow a cutting of patterns 1 whose cutout contour which is assigned to them is likely to present a complex geometric shape.

Le deuxième rouleau de renvoi 9 est un rouleau de guidage du tapis convoyeur 13, qui est monté fou en rotation sur le châssis 3 et qui est placé à la base de la machine, dans la zone du poste de déchargement 7.The second return roller 9 is a guide roller of the conveyor belt 13, which is rotatably mounted on the frame 3 and which is placed at the base of the machine, in the area of the unloading station 7.

La surface extérieure du tapis convoyeur 13 est rendue adhérente pour le maintien par placage de la bande 2 grâce à sa conception perméable à l'air et à sa mise en relation avec des moyens de mise sous dépression (non représentés en détails). Cette mise sous dépression est obtenue à partir d'une mise sous vide d'une chambre de dépression 14 ménagée dans le châssis 3.The outer surface of the conveyor belt 13 is made adherent for the maintenance by plating of the strip 2 thanks to its breathable design and its connection with vacuum means (not shown in detail). This vacuum is obtained from a vacuum of a vacuum chamber 14 formed in the frame 3.

Des moyens générateurs de vide 17 sont mis en communication avec la chambre de dépression 14, soit en étant logés à l'intérieur de cette dernière soit en étant placés à l'extérieur de la chambre de dépression 14 et en étant en communication aéraulique avec celle-ci, tel que représenté schématiquement. La chambre à dépression 14 est délimitée entre les deux grandes faces latérales du tapis convoyeur 13, par le rouleau d'entraînement 8 qui est perméable à l'air pour le passage de la dépression à travers le tapis convoyeur et par le deuxième rouleau 9 de renvoi en fermeture du tapis convoyeur 13. Des flasques d'extrémité 15 portés par le châssis 3 sont placés en bout des rouleaux 8, 9 pour confiner le volume intérieur de la chambre de dépression 14.Vacuum generating means 17 are placed in communication with the vacuum chamber 14, either by being housed inside the latter or by being placed outside the vacuum chamber 14 and being in aeraulic communication with that as shown diagrammatically. The vacuum chamber 14 is delimited between the two large lateral faces of the conveyor belt 13, by the drive roller 8 which is permeable to air for the passage of the vacuum through the conveyor belt and by the second roller 9 of closing the conveyor belt 13. End flanges 15 carried by the frame 3 are placed at the ends of the rollers 8, 9 to confine the internal volume of the vacuum chamber 14.

Le deuxième rouleau de renvoi 9 est étanche à l'air pour interdire un passage à son travers de la dépression produite à l'intérieur de la chambre de dépression 14, et donc un passage de la dépression à travers le tapis convoyeur 13 dans la zone du poste de déchargement.The second return roller 9 is airtight to prohibit a passage therethrough of the depression produced inside the vacuum chamber 14, and thus a passage of the depression through the conveyor belt 13 in the zone the unloading station.

Ces dispositions sont telles que pièces correspondant aux motifs 1 découpés et maintenus plaqués contre le tapis entre le poste de découpe 11 et le poste de déchargement 7 sont spontanément retirés de la bande 2 à partir de leur chute naturelle, en raison de l'absence de dépression à travers le tapis convoyeur 13 dans sa zone de prise sur le deuxième rouleau de renvoi.These arrangements are such that parts corresponding to the patterns 1 cut and held pressed against the carpet between the cutting station 11 and the unloading station 7 are spontaneously removed from the band 2 from their natural fall, because of the absence of depression through the conveyor belt 13 in its gripping zone on the second return roller.

Au poste de déchargement, le reliquat de bande 2 est récupéré par le rouleau de collecte 10, tandis que les motifs 1 sont susceptibles d'être collectés par un opérateur ou d'être récupérés à l'intérieur d'un conteneur ou analogue.At the unloading station, the remaining band 2 is recovered by the collection roll 10, while the patterns 1 are capable of being collected by an operator or to be recovered inside a container or the like.

La machine comporte, au poste de découpe 11, un train de galets presseurs 16, pour conforter le placage de la bande 2 contre le tapis convoyeur 13 dans la zone de mobilité de l'outil de coupe 12 suivant son deuxième axe de mobilité A3.The machine comprises, at the cutting station 11, a set of pressure rollers 16, to reinforce the plating of the band 2 against the conveyor belt 13 in the mobility zone of the cutting tool 12 along its second axis of mobility A3.

Par ailleurs, divers rouleaux de renvoi de la bande 2 peuvent être installés pour guider le déroulement de cette dernière entre le poste de chargement 5 et le poste de déchargement 7, et notamment pour amener la bande 2 en contact contre le tapis convoyeur 13 suivant une surface d'adhérence optimisée.Furthermore, various return rollers of the web 2 may be installed to guide the unwinding of the latter between the loading station 5 and the unloading station 7, and in particular to bring the web 2 in contact against the conveyor belt 13 in a manner that optimized adhesion surface.

La fermeture en boucle du tapis convoyeur 13 est avantageusement réalisée de manière à former un profil présentant deux grandes faces latérales verticales parallèles, pour réduire l'encombrement latéral de la machine à une dimension de l'ordre du diamètre du plus grand rouleau de renvoi 8,9. Il est cependant envisageable que cette fermeture en boucle du tapis convoyeur 13 soit réalisée selon un profil quelconque.The loop closure of the conveyor belt 13 is advantageously made so as to form a profile having two large parallel vertical side faces, to reduce the lateral size of the machine to a dimension of the order of the diameter of the largest return roller 8 9. However, it is conceivable that this loop closure of the conveyor belt 13 is made according to any profile.

Claims (10)

  1. Machine for cutting cut out patterns (1) printed on a substrate in the form of a web (2) conditioned in a roll, this machine comprising a frame (3) of vertical extension and means for the driving of the web (2) along an axis of advance (A1) corresponding to the extension in unfolding of the web (2), these driving means implementing at least one motorized roller (8, 9) arranged transversely with respect to the axis of advance (A1) to circulate the web (2) towards a cutting station (11) interposed between a loading station (5) arranged as an unfolding reel (6) of the web (2) and an unloading station (7) for the discharge of the cut out web (2), the cutting station (11) implementing a cutting tool (12) which is movable along two axes of operation (A2, A3) comprising a first axis of operation (A2) corresponding to the depth of the web (2) for the cutting of the latter and a second axis of operation (A3) aligned transversely with respect to the axis of advance (A1), the cutting operation, along a contour assigned to at least one pattern (1) to be cut out, being carried out from a combination of movements between the movement of the web (2) along the axis of advance (A1) and the displacement of the cutting tool (12) along the second axis of operation (A2), characterized in that the driving means implement a closed loop conveyor belt (13), which is provided with means for adhesion of the web (2) on its outer surface and which is in drive with at least one driving roller (8, 9), this closed loop conveyor belt (13) extending between the loading station (5) and the unloading station (7) which are placed on both sides of the large lateral faces of the frame (3).
  2. Cutting machine according to claim 1, characterized in that the conveyor belt (13) is operable by the driving roller (8, 9) along the two opposite directions corresponding to the axis of advance (A1) of the web (2), so that, on the basis of an operation of the driving roller (8, 9) selectively along one or the other of its senses of rotation, the conveyor belt (13) is alternatively displaced along the aforementioned opposite directions.
  3. Cutting machine according to any one of the preceding claims, characterized in that the driving roller (8) is placed at the cutting station (11) and constitutes a counter cutting member for the cutting tool (12).
  4. Cutting machine according to any one of claims 1 to 3, characterized in that the means for adhesion of the web are indifferently of the depression type or of the electrostatic type.
  5. Cutting machine according to any one of claims 1 to 4, characterized in that the means for adhesion of the web being of the depression type, the conveyor belt (13) is permeable to air and is in air communication with a depression chamber (14) provided by the frame (3).
  6. Cutting machine according to claim 5, characterized in that the depression chamber (14) is delimited between at least two remote return rollers (8, 9) on which the conveyor belt (13) is closed in a loop, and a couple of end flanges (15) which are constituent of the frame (3) and on which the return rollers (8, 9) are rotatably mounted.
  7. Cutting machine according to claim 5, characterized in that the return rollers (8, 9) comprise a first driving roller (8) permitting a through passage of the depression, and at least a second roller (9) indifferently made up of a driving roller or of a free rotating guiding roller.
  8. Cutting machine according to claim 7, characterized in that the second roller (9) is placed at the unloading station (7) and is impermeable to air to constitute a separation member of the patterns (1) with respect to the web (2) due to their natural drop at the unloading station (7).
  9. Cutting machine according to claim 8, characterized in that the unloading station (7) is equipped with a roller for collecting (10) of the remainder of the web (2) laid out downstream of the impermeable roller (9).
  10. Cutting machine according to any one of claims 1 to 9, characterized in that the cutting station (11) is equipped with a train of wheels (16) for pressing the web (2) against the conveyor belt (13) against the support that the latter takes against a counter support member.
EP20080802918 2007-06-18 2008-06-17 Machine for cutting out designs printed on a substrate in the form of a web wound on a reel Not-in-force EP2160346B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0704295A FR2917393B1 (en) 2007-06-18 2007-06-18 MACHINE FOR CUTTING PATTERNS PRINTED ON A SUPPORT FORMED OF A ROLL CONDITIONED BAND
PCT/EP2008/057617 WO2008155328A1 (en) 2007-06-18 2008-06-17 Machine for cutting out designs printed on a substrate in the form of a web wound on a reel

Publications (2)

Publication Number Publication Date
EP2160346A1 EP2160346A1 (en) 2010-03-10
EP2160346B1 true EP2160346B1 (en) 2010-11-17

Family

ID=38983228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080802918 Not-in-force EP2160346B1 (en) 2007-06-18 2008-06-17 Machine for cutting out designs printed on a substrate in the form of a web wound on a reel

Country Status (8)

Country Link
US (1) US20100186566A1 (en)
EP (1) EP2160346B1 (en)
AT (1) ATE488462T1 (en)
CA (1) CA2689167A1 (en)
DE (1) DE602008003577D1 (en)
ES (1) ES2353046T3 (en)
FR (1) FR2917393B1 (en)
WO (1) WO2008155328A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1399088B1 (en) * 2010-03-25 2013-04-05 Scm Group Spa SYSTEM AND RELATIVE METHOD OF TRANSPORTATION OF PANELS IN MILLING MACHINES.
US10111581B2 (en) 2014-02-27 2018-10-30 Align Technology, Inc. Thermal defogging system and method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH420597A (en) * 1964-03-26 1966-09-15 Firestone Prod Device for separating fabric or film webs for the manufacture of vehicle tires
US4593293A (en) * 1983-09-28 1986-06-03 Sanders Associates, Inc. X, Y plotter
US4785696A (en) * 1987-04-03 1988-11-22 Kraft, Inc. High-speed apparatus for forming sheets from a web
US4952950A (en) * 1988-03-11 1990-08-28 Rastergraphics, Inc. Paper transport and paper stabilizing system for a printer plotter or the like
EP0494484A1 (en) * 1991-01-09 1992-07-15 Mimaki Engineering Co., Ltd. Roll paper supporting device of cutting plotter
JPH05162098A (en) * 1991-12-16 1993-06-29 Kawakami Seisakusho:Kk Cutting device for stacked material
US7685692B2 (en) * 2004-05-21 2010-03-30 Industrial Technology Research Institute Process for removing material from a substrate

Also Published As

Publication number Publication date
EP2160346A1 (en) 2010-03-10
FR2917393B1 (en) 2009-08-21
US20100186566A1 (en) 2010-07-29
ES2353046T3 (en) 2011-02-24
DE602008003577D1 (en) 2010-12-30
ATE488462T1 (en) 2010-12-15
WO2008155328A1 (en) 2008-12-24
CA2689167A1 (en) 2008-12-24
FR2917393A1 (en) 2008-12-19

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