EP3319878B1 - Machine d'emballage pour un produit unique ou des produits groupés et/ou empilés, dans des paquets de matériau thermoplastique obtenu à partir d'un film déroulé à partir d'un rouleau et procédé de fonctionnement associé - Google Patents

Machine d'emballage pour un produit unique ou des produits groupés et/ou empilés, dans des paquets de matériau thermoplastique obtenu à partir d'un film déroulé à partir d'un rouleau et procédé de fonctionnement associé Download PDF

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Publication number
EP3319878B1
EP3319878B1 EP16736628.5A EP16736628A EP3319878B1 EP 3319878 B1 EP3319878 B1 EP 3319878B1 EP 16736628 A EP16736628 A EP 16736628A EP 3319878 B1 EP3319878 B1 EP 3319878B1
Authority
EP
European Patent Office
Prior art keywords
sealing
transverse heat
pack
heat
cutting assembly
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.)
Active
Application number
EP16736628.5A
Other languages
German (de)
English (en)
Other versions
EP3319878A1 (fr
Inventor
Stefano Cassoli
Marco Cassoli
Paolo Cassoli
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.)
CPS Co Srl
Original Assignee
CPS Co Srl
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Filing date
Publication date
Application filed by CPS Co Srl filed Critical CPS Co Srl
Priority to RS20200853A priority Critical patent/RS60742B1/sr
Publication of EP3319878A1 publication Critical patent/EP3319878A1/fr
Application granted granted Critical
Publication of EP3319878B1 publication Critical patent/EP3319878B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/2007—Means for stripping or squeezing filled tubes prior to sealing to remove air or products from sealing area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/14—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/30—Arranging and feeding articles in groups
    • B65B35/40—Arranging and feeding articles in groups by reciprocating or oscillatory pushers
    • B65B35/405—Arranging and feeding articles in groups by reciprocating or oscillatory pushers linked to endless conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/28—Rollers for producing longitudinal and transverse seams simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/001—Arrangements to enable adjustments related to the product to be packaged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/003—Arrangements to enable adjustments related to the packaging material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/005—Adjustable conveying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/02—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, slitting, or applying code or date marks on material prior to packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
    • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
    • B65B61/10—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting using heated wires or cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/14—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for incorporating, or forming and incorporating, handles or suspension means in packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/28—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for discharging completed packages from machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
    • B65B63/02—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles
    • B65B63/026—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles for compressing by feeding articles through a narrowing space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/2042—Means for altering the cross-section of the tube filling opening prior to transversal sealing, e.g. tube spreading devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B2220/00—Specific aspects of the packaging operation
    • B65B2220/10—Creating an off-center longitudinal seal on horizontal or vertical form fill seal [FFS] machines

Definitions

  • the invention relates to a machine for wrapping single or grouped and/or stacked products, particularly paper or nonwoven products, for sanitary or other uses, in packs of thermoplastic material obtained from a film unwound from a reel and concerns the operating method of this machine.
  • upstream and downstream relate to the direction of feed of the packs.
  • a loading station of the products to be packaged for example toilet rolls, absorbent paper for kitchen or other uses, packs of napkins or hand towels, also in nonwoven, where these products are grouped together and/or stacked to form a bundle that is preferably subjected to slight pressure in transverse direction and that after this step has a cross section of a shape and width slightly less than the internal cross section of said hollow mandrel on the outside of which said tubular wrapping slides, gusseted and closed at the leading end.
  • a pusher is activated to eject the bundle from said loading station, slide it along said hollow mandrel and, at the exit thereof, push it against the closed leading end of the tubular wrapping, causing this wrapping to advance and, while it exits from the hollow mandrel, become engaged by the bundle, which due to the previous slight transverse compression to which it was subjected in said loading station and due to its elastic memory, expands slightly and closely engages the portion of tubular package ejected from the mandrel and which with this is supported by conveyor means below.
  • the pusher ends its active movement downstream of the mandrel and slightly downstream of the transverse heat-sealing and cutting assembly, which is in open position, after which the same pusher reverses its movement and returns to the cycle start position, to free the loading station and allow repetition of a new operating cycle.
  • the lateral gusseting means of the portion of tubular wrapping positioned between the trailing end of the bagged bundle and the discharge mouth of the tube-forming mandrel are activated, followed by activation of the transverse heat-sealing and cutting assembly, which carries out closing of the trailing end of the filled pack, which closes the leading end of the pack being formed and still to be filled, after which said assembly opens slightly to release the heat seals and allow action thereon of optional blower cooling means positioned on the same assembly, which in sequence opens fully to allow repetition of a new operating cycle, while the pack produced is moved away by the conveyor that supports it.
  • the invention intends to overcome these and other limits of the prior art, to produce reliable packaging machines with high hourly production rates, with the idea of a solution according to the appended claim 1) and to the subsequent dependent claims 2, 3 and 5, for which the transverse heat-sealing and cutting assembly is provided with pressers at least upstream of the heat-sealing means, so as to firmly clamp the film before, during and after the step of carrying out the transverse heat seals.
  • the same transverse heat-sealing and cutting assembly is movable in the pack forming direction, first closed and moving away from said tube-forming mandrel and then open and in the opposite direction, to return to the cycle start position for repetition of a subsequent operating cycle.
  • the tubular pack can now advance along the tube-forming mandrel drawn by the new double transverse heat-sealing and cutting assembly with pressers, as a result of which it is possible:
  • the packaging machine comprises as intermediate component an axially hollow mandrel 1 in the shape of a sailor neck tie with a rectangular or square cross section, adjustable when the format of the pack to be produced changes, positioned horizontally with its longitudinal axis, equipped on the left when viewing the figures with an open end 101 from which the film 102 coming from a reel below 2 enters and which by guide means typical of mandrels in the shape of a sailor neck tie is made to adopt a tubular shape, to move longitudinally along the same mandrel 1 towards the outlet 201 thereof, with mutual overlapping of the longitudinal flaps of the same film and with continuous and mutual heat-sealing of these by a heat-sealing device of known type 3, so that the same film exits from the outlet 201 of the mandrel 1 in the form of a sack and with a cross section of a size slightly larger than the inner cross section of the same mandrel 1 that externally guides and supports said
  • the known loading station 4 Upstream of the mandrel 1 there is provided the known loading station 4 in which means, also known, form a bundle of grouped and/or stacked products, coming from at least any one feed line, not shown as not necessary in order to understand the invention.
  • the loading station 4 is also adjustable when the format of the packs to be produced changes and can advantageously be characterised by subjecting the bundle of paper product to an adequate transverse compression, so that when the same bundle is ejected longitudinally from the loading station 4, it can easily enter the hollow mandrel 1 and can slide along it still in a condition of adequate transverse compression.
  • the dot and dash line 5 indicates the ideal horizontal plane on which the bottom of the bundle and the packs produced by the packaging machine in question move.
  • the pusher 6 Upstream of the loading station 4 there is provided the pusher 6 supported by the front end of a horizontal rod 106, whose longitudinal axis is parallel to the common longitudinal axis of the aforesaid stations 1 and 4 and that extends to the left when viewing Figs. 1 and 2 .
  • the rod 106 is guided longitudinally by rolling means 7 supported by a base plate 8 in the form of a portal, on which there is also mounted a gear motor assembly 9, on the vertical output shaft of which there is press fitted a toothed pulley 10 that cooperates with a toothed belt 11 guided on a pair of idle pulleys 12 and parallel to the pulley 10, also supported by the portal 8, so as to carry the same toothed belt 11 in a path parallel to the rod 106 and to be able to be fixed thereto with the opposite ends, so as to form the equivalent of a rack fixed longitudinally to the rod 106 and meshing with the pinion 10, so that by rotating the motion unit in one or other direction, it is possible to operate the pusher 6 in the useful movement for transfer of the bundle formed in the loading station 4 along the tube-forming mandrel 1 and downstream thereof and of the transverse heat-sealing and cutting assembly (see below), for insertion of the same bundle into the tubular pack produced by the same mandrel
  • the innovative assembly 13 Downstream of the mandrel 1, at a short distance from the outlet 201 thereof, there is provided the innovative assembly 13 that carries out the double transverse heat seal and the intermediate cut on the pack and that, according to the invention, after closing on the vertical plane, is operated first with a horizontal movement away from the same mandrel 1, to accompany the pack in the transverse heat-sealing and cutting step and then, after opening on the vertical plane, is translated horizontally in the opposite direction to the preceding one, to return to the initial starting position illustrated with a continuous line in Figs. 1 and 2 , for repetition of a new operating cycle, carrying out reciprocating movement B, the length or range of which will be correlated to the length of the packs to produce and will therefore be variable (see below).
  • the assembly 13 is mounted on a carriage 14 that by means of lateral recirculating ball slides 15, slides on pairs of rectilinear and horizontal guides 115 fixed longitudinally on the inner faces of the side panels of the portion of base plate 116 of the packaging machine that extends downstream of the one 16 ( fig. 2 ) that supports the stations 1, 4 and 6 described previously.
  • the inner side panels of the base plate 106 support toothed belts 17 closed in a loop and guided on respective end pulleys 18, one pair of which is interconnected by a transverse shaft 19, in turn connected by means of a positive motion transmission 20 to a motion assembly 21 with electric motor that rotates in two directions and preferably of the type with electronic speed and phase control.
  • the two side panels of the carriage 14, which can be carried in the rectilinear reciprocating movement of the aforesaid range B by the motion assembly 20, are fixed to the upper branch of the two toothed belts 17 with clamps 22 ( fig. 3 ).
  • the assembly 13 comprises two elements 113' and 113" parallel to and opposite each other, positioned on a common ideal vertical plane, transverse to the longitudinal direction of the ideal plane 5 of advance of the packs, the lower 113" of which is positioned under this plane 5 at the start of each cycle, while the upper element 113' is raised and at a distance from the plane 5 that allows the packs cyclically exiting from the mandrel 1 to pass below without interference.
  • the elements 113', 113" are moved towards each other with a self-centring movement on the common ideal vertical plane, so as to meet approximately at half the height of the packs to be closed.
  • the position in height of the support and guide means of said elements 113' and 113" can be adjusted simultaneously, without adjusting the related distance at rest.
  • the support means of said elements 113' and 113" are mounted on respective vertical slides 23 positioned inside the side panels of the carriage 14 that support these slides with guide means 24.
  • Each slide 23 is equipped with an protruding intermediate appendage 123, with a lead screw 125 that cooperates with a vertical screw 25, in turn connected, with the interposition of a safety coupling 26, to a three-way bevel gearbox 27, the vertical way of which acts on the screw 25, while one of the horizontal ways connects the screw 25 of a slide to that of the slide of the opposite side, which will be served by a two-way bevel gearbox, while the third horizontal way of the gearbox 27 is connected to a motion assembly 28 with electric motor that rotates in two directions and preferably of the type with electronic speed and phase control, to allow the automatic or semi-automatic adjustment of the position in height of the transverse heat-sealing and cutting assembly 13.
  • each rod 31 is fixed by means of respective clamps 132, 133 to the opposite branches of toothed belts 34 guided on a pulley 35 supported adjustably by the upper end of each rod 31 and on a toothed pulley 36 supported by the lower end of each vertical slide 23 and the same lower pulleys 26 are connected to each other by a synchronizer shaft 37, which by means of a positive motion transmission 38 is connected to a motion assembly 39 with electric motor that rotates in two directions and preferably of the type with electronic speed and phase control.
  • the opposed elements 113' and 113" of the transverse heat-sealing and cutting assembly 13 receive the movements for the opening and closing steps from this motion assembly, with the necessary acceleration and deceleration ramps, as indicated below.
  • the upper branch of the conveyor 41 is guided on a roller 43 positioned at the outlet of the mandrel 1 and supported rotatingly by the side panel of the base plate 116 of the packaging machine, together with the end roller 143.
  • the lower branch of the conveyor 41 is instead guided on idle rollers 44, on at least one dancer roller 44' and on a toothed pulley 45 press fitted onto the slow output shaft of a motion assembly 46.
  • the upper branch of the conveyor 41 is guided on a roller 47 parallel to and positioned at the same height as the roller 43 and is then guided on three lower rollers 48, 49 and 50, also parallel to one another, idle and parallel to the roller 47, and which with this take the same upper branch of the conveyor 41 to form said gap 40 in which the lower element 113" of the transverse heat-sealing and cutting assembly 13, in its lowered rest position, can be positioned and through which the same element 113" can, on command, be raised to cooperate with the upper element 113'.
  • the rollers 47 to 50 are supported rotatingly by the carriage 14 and move therewith.
  • the roller 50 is positioned at a lower height than the roller 47, so that two idle rollers 51 and 52, positioned respectively downstream and upstream of the same roller 50, and the latter of which is at the same height as the roller 47, can be placed above the same roller 50. Passing over the rollers 50, 51 and 52, the conveyor belt 41 takes a zigzag path.
  • the rollers 51 and 52 are mounted rotating on a small secondary carriage 53 that is mounted on the main carriage 14 and is able to carry out thereon, on command, a controlled horizontal movement that can take the same rollers 51 and 52 from the moved back position of Fig. 11 , in which the gap 40 is substantially closed and the pack can pass easily over the rollers 47 and 52, to the extended position of Fig. 12 in which the gap 49 is open to allow freedom of movement on the vertical of the lower element 113" of the transverse heat-sealing and cutting assembly 13.
  • rollers 51, 52 are mounted transversely on the opposite ends of a said secondary carriage 53, equipped laterally with horizontal and longitudinal guides 153 sliding on slides 54 fixed on the top of a cross member 55, in turn fixed with the its ends to the side panels of the main carriage 14.
  • the cross member 55 supports, rotatingly and in a cantilever fashion, a pair of screws 56 parallel to each other and to the guides 54 and lead screws 156, integral with appendages 253 of the secondary carriage 53, cooperate with these screws 56.
  • the two screws 56 are operated by means of a positive motion transmission 57 by a motion assembly 58 flanged to the cross member 55 and operated by an electric motor that rotates in two directions and optionally also with electronic phase control.
  • the secondary carriage 53 with the rollers 51 and 52 is illustrated with a continuous line in the extended position that closes the gap 40, while it is illustrated with a dashed line in the moved back position that opens the same gap 40.
  • the same figure clearly shows how the rollers 51 and 52 carry out movements D of equal range and such that when the roller 52 moves back to the left, when viewing Fig. 10 , and causes a double shortening D of the upper part of the conveyor 41, the lower roller 51 also moves to the left and causes a double lengthening D of the lower part of the same conveyor 41, so that the movements of the secondary carriage 53 do not modify the longitudinal tension of the same conveyor 41 and do not modify its movement.
  • opposed folders 59, 59' are provided at the side of the conveyor 41 and at the transverse heat-sealing and cutting assembly 13, which prior to operation of the same assembly 13 act on the sides of the portion of tubular pack exiting from the mandrel 1, which is not engaged by the product to be packaged (see below) and that is to be engaged by the same assembly 13, to produce recessed lateral gusseting on the same portion of pack, which are useful to prevent the heat sealed area from protruding laterally from the pack and to ensure that the same area closely wraps the end of the packaged products.
  • the folders 59, 59' can be mounted adjustably on respective slides 60, 60' sliding on guides 61, 61' constrained to the fixed frame 116 of the packaging machine, the same slides 60, 60' being operated by respective fluid pressure piston cylinder assemblies 62, 62' or by other suitable linear reciprocating motion actuators.
  • the composition of the means that form the elements 113' and 113" of the double transverse heat-sealing and intermediate cutting assembly 13 is now described.
  • the elements 113' and 113" are illustrated in the step of movement towards each other and that, with a greater distance between the same elements, is equivalent to the rest position of the same elements 113', 113" of the assembly 13.
  • the transverse heat-sealing and cutting assembly which is now described with reference to Fig. 5 , is able to produce a pack C1 as shown in Fig. 6 , closed longitudinally by the heat seal SL formed by the heat-sealing device 3 shown in Figs.
  • the assembly 13 must be able to carry out simultaneously, on the portion of tubular pack on which it is pressed transversely, the parallel heat seals ST2 for the pack already filled and to be closed at the trailing end, the parallel heat seal ST1 for the following pack still to be filled with product, the intermediate cut that produces the edges B2, B1 and the mutual separation of the packs and to carry out punching to form the opening G acting as handle.
  • the upper element 113' of the assembly 13 is equipped at least upstream, but preferably both upstream and downstream, with pressers 63, 63', which with their lower edge with rounded profile, both project downwards with respect to the lower operating surface of the same element 113', and which can move back towards this operating surface, in opposition to the action of counter springs 64, 64'.
  • pressers 63, 63' On the lower operating surface of the element 113', in a position vertically and horizontally moved back from the pressers 63, 63' and arranged coplanar with each other, there are provided the heat sealing devices 65 and 66 for carrying out the heat seals ST1 and ST2 of Fig.
  • the hot cutting means 67 for separating the packs from one another and for forming the fused edges B1 and B2 of the same pack of Fig. 6 .
  • the intermediate part of the lower operating surface of the element 113' there are provided two small spring operated pressers 68, 68', the lower and suitably rounded edge of which projects slightly downwards from the ideal plane that contains the heat sealing devices 65, 66 and, in a position moved back from these intermediate pressers 68, 68', there is provided a punching unit 69 for forming the cut G on the handle M of the pack C1 of Fig. 6 .
  • the whole assembly 113' is supported by the support part 70 positioned above connected to the sleeves 33 shown in Figs. 3 and 4 , with the interposition of spring and compensation means 71, common in the transverse heat sealing and cutting means in question.
  • the lower element 113" of the assembly 13 as shown in Fig. 3 comprises, with arrangement on a common ideal horizontal plane, counter means 163, 163' opposite the pressers 63, 63', counter-heat sealing devices 165, 166 opposite the heat sealing devices 65, 66, a counter means 167 for the cutting means 67, counter means 168, 168' for the intermediate pressers 68, 68' and a punch 169 for the upper punching unit 69.
  • the pressers 63, 63' and the respective counter means 163, 163 are produced or machined so as to have a high coefficient of friction in contact with the film that forms the packs and that exits from the tube-forming mandrel 1.
  • the transverse heat sealing and cutting assembly 13 will be simplified as shown in Fig.7 , with the upper element 113' equipped only with the outer pressers 63, 63', the heat sealers 65, 66 and the hot cutting means 67, while the lower element 113" will carry the counter means 163, 163', 165, 166, 167 for the aforesaid operating means positioned above.
  • the numeral 72 indicates a processor programmable through a unit 73, and to which all the electric motors of the aforesaid motion assemblies are connected, to allow automatic and safe operation of the packaging machine, as is now described with reference to Figs. 11 to 16 .
  • Fig. 11 illustrates the transverse heat sealing and cutting assembly 13, which previously carried out heat sealing of the trailing end of the finished pack C1, heat sealing of the leading end of the new pack C1' and the intermediate transverse cut to separate from the new pack C1' the pack C1, which is moved away by the upper branch of the conveyor 41 that moves in the direction 42 to be unloaded, also to maintain the subsequent pack C1' exiting from the mandrel 1 lying longitudinally as a result of the pull exerted previously by the same assembly 13 in the previous movement to the right, when viewing Fig. 11 , as the same new pack C1' has in correct phase been filled by the pusher 6, which in correct phase moves back as indicated with the dashed line.
  • the elements 113', 113" of the assembly 13 are spaced from each other or open, with the lower element 113" inside the gap 40 and with the upper element 113' in raised position so as not to interfere with the new pack C1'.
  • the gap 40 is in this phase closed to prevent interference when passing below the same new pack C1' and is arranged upstream of this pack C1'.
  • the secondary carriage 53 moves to the right and opens the gap 40 to free the ideal vertical plane on which the elements 113', 113" of the transverse heat-sealing and cutting assembly 13 move.
  • the elements 113' and 113" of the assembly 13 are commanded to carry out a self-centring closing movement which closes them immediately downstream of the product P packaged in C1' and at half the height of this same pack, in the fully closed condition shown in Fig. 5a or in the partially closed condition shown in Fig. 5 or in Fig. 5b .
  • the lateral folders 59, 59' are moved back to the rest position and, in sequence, the main carriage 14 that carries the assembly 13 is translated to the left. If the elements 113', 113" of the assembly 13 are not fully closed, as shown in Fig. 5 or Fig. 5b , the initially slow movement of the same assembly 13 away from the mandrel 1 and the resistance created by the tube of film 102 that impacts the tube-forming mandrel 1, can cause the pack C1' to move close to the assembly 13 to allow an adequately tight wrapping to be formed also in longitudinal direction. In sequence, the elements 113', 113" of the assembly 13 are closed as shown in Fig.
  • the pusher 6 inserts the product P to be packaged into the future pack C1", in which the same product expands transversely due to the previous transverse compression to which it was subjected in the loading station 4 shown in Figs. 1 and 2 and the insertion speed of the same product in the wrapper of C1" can be such that the air trapped in this pack and positioned upstream of the product P being packaged, escapes slowly downstream, without damaging the same pack C1", which is nonetheless firmly retained by the presser upstream 63, 163 of the assembly 13, this latter which is taken in correct phase to the condition shown in Fig. 5b to allow rapid cooling of the heat seals carried out by the same assembly 13.
  • the secondary carriage 53 is moved to the left to close the gap 40 and then the main carriage also translates to the left to return to the cycle start position shown in Fig. 1 , without the slightest interference with the bottom of the new pack C1", which is maintained lying flat by the active movement 42 of the conveyor 41.
  • the pusher 6 is, or has already been, moved back in correct phase to repeat a new operating cycle. The return movement to the start of the cycle by the assembly 13 in open position can take place very rapidly, further increasing the productivity of the packaging machine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Claims (10)

  1. Machine d'emballage pour emballer des produits individuels ou groupés et/ou empilés, dans des paquets de matériau thermoplastique, ladite machine comprenant :
    - un dispositif de thermosoudage (3),
    - un ensemble de coupe et de thermosoudage transversal (13) pour effectuer un double thermosoudage transversal et une coupe intermédiaire sur les paquets de matériau thermoplastique,
    - des plieurs (59, 59') disposés sur l'ensemble de coupe et de thermosoudage transversal (13),
    - un mandrin horizontal creux (1) à l'extrémité de chargement (101) duquel est alimenté un film continu de matériau thermoplastique (102), déroulé à partir d'un rouleau (2), qui en procédant vers l'extrémité de déchargement (201) de ce mandrin, est formé en un tube avec chevauchement et thermosoudage mutuel de ses bords longitudinaux par le dispositif de thermosoudage (3) et qui sort du même mandrin (1) sous la forme d'un emballage tubulaire (102'), qui est fermé transversalement par l'ensemble de coupe et de thermosoudage transversal (13) positionné en aval du même mandrin (1) et qui, sur la portion de l'emballage tubulaire précédemment pliée en soufflet par les plieurs (59, 59'), effectue deux thermosoudages transversaux (ST1, ST2) et une coupe intermédiaire (B1, B2), rempli et formé dans le cycle précédent, pour fermer l'extrémité avant du paquet suivant (C1") et pour séparer le paquet complété (C1') de celui qui est en train d'être formé (C1"), la machine comprend en amont dudit mandrin (1) et alignée longitudinalement avec celui-ci,
    - une station de chargement (4) des produits (P) à emballer, groupés et/ou empilés et comprimés dans la direction transversale et la machine comprend en outre en amont de ladite station (4) et aligné longitudinalement avec celui-ci
    - un dispositif de poussée (6) qui, sur commande, transfère le produit ou les produits (P) de la station de chargement (4) dans le paquet tubulaire produit par ledit mandrin (1), passant à travers ce dernier sur toute sa longueur et au-delà,
    caractérisé en ce que ledit ensemble de coupe et de thermosoudage transversal (13) comprend des éléments parallèles et opposés (113', 113") pour effectuer le double thermosoudage transversal au moyen de dispositifs de thermosoudage (65, 66) et la coupe intermédiaire avec des moyens de coupe (67), lesdits éléments (113, 113') étant équipés en amont desdits dispositifs de thermosoudage (65, 66) avec des presses respectives (63, 63') et des presses antagonistes (163, 163') pour pincer fermement dans la direction transversale la portion d'emballage pliée en soufflet (102') sur lequel l'ensemble de coupe et de thermosoudage transversal (13), sur commande, est fermé, la machine comprend en outre un chariot principal (14), l'ensemble de coupe et de thermosoudage transversal (13) étant monté sur le chariot principal (14) avec un mouvement horizontal actionné par des moyens de déplacement pour être susceptible en phase correcte d'être écarté du mandrin formant le tube (1) pour suivre le paquet complété pendant le thermosoudage de l'extrémité arrière et pour extraire du mandrin (1) une nouvelle portion d'emballage tubulaire (102') dans lequel en phase correcte ledit dispositif de poussée (6) insert un produit (P) pour former ledit paquet ultérieur (C1"), des moyens de manière étant fourni à ce que ledit chariot principal (14) soit rapidement ramené à la position initiale déplacé vers le mandrin (1), pour être arrangé en aval du nouvel paquet (C1") déjà rempli et à fermer à l'extrémité arrière, la machine comprenant en outre un convoyeur motorisé (41) pour supporter les paquets étant formés en aval dudit mandrin (1) et une branche supérieure de ce convoyeur (41) étant guidée sur des rouleaux parallèles (47, 48, 49, 50) supportés en rotation par ledit chariot principal (14) et étant guidée en un trajet en zigzag sur des rouleaux ultérieurs (51, 52) supportés par un chariot secondaire (53) monté sur le chariot principal (14) et coulissant horizontalement sur commande sur le chariot principal (14), tout cela pour former sur l'ensemble de coupe intermédiaire et de thermosoudage transversal (13) un espace (40) à l'intérieur duquel l'élément inférieur (113") dudit ensemble (13) est normalement logé et cet espace (40) étant ouvert par le mouvement dans une direction dudit chariot secondaire (53), pour permettre la liberté d'action de cet élément inférieur (113") et le même espace (40), quand engagé par ledit élément inférieur (113"), étant fermé par le mouvement dudit chariot secondaire (53) dans la direction opposée, de manière à ce que ledit convoyeur (41) supporte correctement les paquets étant formés pendant le mouvement de retour dudit chariot principal (14).
  2. Machine d'emballage selon la revendication 1, où le chariot principal (14) qui transporte ledit ensemble de coupe et de thermosoudage transversal (13), est équipé latéralement avec des coulisseaux (15) qui coulissent sur des paires de glissières horizontales et rectilignes (115) fixées longitudinalement aux panneaux latéraux de la portion de la plaque de base (116) de la même machine et ces panneaux latéraux supportent également, parallèles auxdites paires de glissières (115), des courroies dentées (17) fermées dans une boucle et guidées sur des poulies terminales respectives (18), une paire desquelles est interconnectée par un arbre transversal (19) lui-même relié à un ensemble de mouvement (20, 21) avec un moteur électrique qui tourne dans deux directions et du type avec un contrôle de vitesse et de phase électronique, les deux panneaux latéraux du chariot principal (14) étant reliés à une branche des deux dites courroies dentées (17) au moyen de pinces (22), pour recevoir de ces dernières le mouvement de va-et-vient rectiligne nécessaire avec les rampes d'accélération et de décélération nécessaires.
  3. Machine d'emballage selon la revendication 1, où les moyens de support des deux éléments parallèles et opposés (113', 113") qui forment ledit ensemble de coupe et de thermosoudage transversal (13), sont montés sur des coulisseaux verticaux respectifs (23) positionnés dans les panneaux latéraux du chariot principal (14) qui supportent lesdits coulisseaux (23) avec des moyens de guidage (24), chaque coulisseau (23) étant équipé avec une appendice en saillie intermédiaire (123), avec une vis-mère (125) qui coopère avec une vis verticale (25), elle-même reliée à une boîte d'engrenages coniques à trois voies (27), la voie verticale de cette dernière agit sur ladite vis (25), tandis que une des voies horizontales relie la même vis (25) d'un coulisseau (23) à celle du coulisseau (23) du côté opposé, qui sera servie par une boîte d'engrenages coniques à deux voies, tandis que la troisième voie horizontale de ladite boîte d'engrenages (27) est reliée à un ensemble de mouvement (28) avec un moteur électrique qui tourne dans deux directions et de préférence du type avec un contrôle de vitesse et de phase électronique, pour permettre le réglage automatique ou semi-automatique de la position en hauteur de l'ensemble de coupe et de thermosoudage transversal (13) quand la hauteur des paquets à fabriquer varie.
  4. Machine d'emballage selon la revendication 3, où fixés aux côtés internes desdits coulisseaux verticaux (23) avec des supports (29, 30) qui les supportent respectivement par l'extrémité inférieure et par une aire intermédiaire, sont des tiges de guidage verticales (31), avec une section circulaire, coulissant sur lesquelles, avec l'interposition de roulements à billes de recirculation, sont des manchons (32, 33), desquelles le manchon inférieur (32) coulisse entre lesdits supports (29, 30) et supporte l'extrémité de l'élément de coupe et de thermosoudage transversal inférieur (113"), tandis que les manchons supérieurs (33) coulissent au-dessus des supports supérieurs (30) des tiges respectives (31) et supportent les extrémités de l'élément de coupe et de thermosoudage transversal supérieur (113'), les manchons (32, 33) de chaque dite tige (31) étant fixés au moyens de pinces respectives (132, 133) aux branches opposées des courroies dentées (34) guidées sur une poulie (35) supportée de manière réglable par l'extrémité supérieure de chaque dite tige (31) et sur une poulie dentée (36) supportée par l'extrémité inférieure de chaque dits coulisseaux verticaux (23) et les mêmes poulies inférieures (26) sont reliées les unes aux autres par un arbre de synchronisation (37), lui-même relié à un ensemble de mouvement (38, 39) avec un moteur électrique qui tourne dans deux directions et de préférence du type avec un contrôle de vitesse et de phase électronique, qui transmet aux éléments opposées (113', 113") de l'ensemble de coupe et de thermosoudage transversal (13) les mouvements pour une fermeture totale ou partielle ou une ouverture totale ou partielle, avec les rampes d'accélération et de décélération nécessaires.
  5. Machine d'emballage selon la revendication 1, où les presses (63, 63') positionnées en amont et en aval des dispositifs de thermosoudage (65, 66) de l'élément supérieur (113') de l'ensemble de coupe et de thermosoudage transversal (13), sont sollicités en extension vers le bas par des ressorts antagonistes respectifs (64, 64') de manière à ce que quand ils sont au repos, les bords inférieurs avec un profil circulaire des mêmes presses sont suffisamment espacés les uns des autres par la surface de fonctionnement inférieure du même élément supérieur (113'), tandis que l'élément inférieur (113") du même ensemble (13) comprend avec un agencement sur un plan idéal horizontal commun, des moyens antagonistes (163, 163') opposés aux presses supérieures (63, 63') qui, de la même manière de ces moyens antagonistes (163, 163') sont fabriqués ou usinés de manière à ce qu'ils ont un fort coefficient de friction au contact de l'emballage tubulaire (102') du film qui forme les paquets et qui sort dudit mandrin formant le tube (1), tout cela pour que, également en combinaison avec l'action desdits ressorts antagonistes (64, 64'), ledit emballage de film (102') est susceptible d'être pincé fermement entre ces presses (63, 63') et les moyens antagonistes respectifs (163, 163') soit quand lesdits éléments (113, 113') sont poussés les uns contre les autres pour effectuer les deux thermosoudages transversaux et la coupe intermédiaire pour quoi ils sont responsables, soit quand ces éléments (113', 113") sont proches les uns des autres mais avec les moyens de coupe intermédiaire et le thermosoudage transversal (65, 66, 67) soulevés par les moyens antagonistes respectifs (165, 166, 167), pour libérer et refroidir les portions thermosoudées et coupées d'emballage.
  6. Machine d'emballage selon la revendication 2, où ledit chariot secondaire (53) qui supporte les rouleaux de guidage en zigzag (51, 52) de la branche supérieure du convoyeur (41), est équipé latéralement avec des glissières horizontales et longitudinales (153) coulissant sur des coulisseaux (54) fixés sur la partie haute d'un élément transversal (55), lui-même fixé avec ses extrémités aux panneaux latéraux du chariot principal (14), cet élément transversal (55) supportant de manière rotative et dans un porte à faux, une paire de vis (56) parallèles les unes aux autres et auxdites glissières (54) et ces vis (56) coopèrent avec des vis-mère respectives (156), solidaires des appendices (253) du chariot secondaire (53) et ses vis (56) étant actionnées par un ensemble de mouvement (57, 58) bridé audit élément transversal (55) et actionné par un moteur électrique qui tourne dans deux directions et facultativement également du type avec un contrôle de phase électronique.
  7. Procédé pour emballer des produits individuels ou groupés et/ou empilés (P), dans des paquets de matériau thermoplastique obtenu à partir d'un film déroulé à partir d'un rouleau, avec une machine selon les précédentes revendications de 1 à 6, avec un ensemble de coupe et de thermosoudage transversal (13) équipé avec des presses et des presses antagonistes (63, 163, 63', 163') en amont et en aval des moyens de coupe et de thermosoudage transversal (65, 165, 67, 167, 66, 166), pour être capable de pincer fermement le paquet tubulaire de film pendant l'étape de réalisation des thermosoudages transversaux et dans lequel le même ensemble de coupe et de thermosoudage transversal (13) est déplaçable dans la direction de formation de paquet, premièrement fermé et écarté du mandrin formant le tube (1) et puis ouvert et dans la direction opposée, pour revenir à la position de départ du cycle pour répétition d'un cycle de fonctionnement ultérieur, tout cela pour que l'avancement de l'emballage tubulaire (102') le long du mandrin formant le tube (1) puisse avoir lieu poussé par le même ensemble de coupe et de thermosoudage transversal (13) avec des presses, caractérisé en ce qu'avec cet ensemble (13) il est possible d'effectuer pendant les étapes de formation et remplissage de chaque paquet tubulaire ultérieur (C1, C1', C1" etc.), tandis que l'ensemble de coupe et de thermosoudage transversal (13) est fermé et s'écarte du mandrin (1) et également caractérisé en ce que le mouvement de retour à la position de départ de cycle de l'ensemble de coupe et de thermosoudage transversal (13), après son ouverture, chevauche le mouvement de retour à la même vitesse du dispositif de poussée (6) pour ensacher le produit et, après cette étape de retour, un paquet (C1") rempli et prêt pour la fermeture de l'extrémité arrière est déjà positionné en aval de l'ensemble de coupe et de thermosoudage transversal (13).
  8. Procédé selon la revendication 7, caractérisé en ce que pendant que le nouveau paquet tubulaire (C1') avance et est poussé par l'ensemble de coupe et de thermosoudage transversal (13) avec des presses (63, 163, 63', 163'), qui thermosoude l'extrémité avant de ce nouveau paquet, ferme l'extrémité arrière du paquet (C1) du cycle précédent et accompagne ce dernier pour être déchargé, le même nouveau paquet (C1') peut être rempli rapidement par le dispositif de poussée indiqué (6), comme la presse (63, 163) en aval de cet ensemble de coupe et de thermosoudage transversal (13), isole mécaniquement le thermosoudage transversal de l'extrémité avant (ST1) effectué sur le nouveau paquet, de manière à ce que ce thermosoudage transversal (ST1) n'est pas sollicité par l'insertion du produit (P) dans le nouveau paquet tubulaire (C1') et par la poussée de l'air emprisonné dans le même nouveau paquet (C1') et positionné face au produit (P), de même dans cette étape étant possible pour le dispositif de poussée d'insérer le produit (P) dans le nouveau paquet avec une vitesse relative qui permet un déchargement vers l'arrière lent et progressif de l'air qui est comprimé en amont du même produit (P) et contre l'extrémité avant du nouveau paquet (C1').
  9. Procédé selon les revendications précédentes, où pendant l'écartement actif du mandrin formant le tube (1), l'ensemble de coupe et de thermosoudage transversal (13) dispose de tout le temps nécessaire pour effectuer ses opérations principales de coupe et de thermosoudage et, dans la dernière partie du même mouvement actif, pour ouvrir légèrement les thermosoudeuses et les moyens de coupe pour libérer les thermosoudages transversaux (ST1, ST2) et permettre l'action des moyens pour le refroidissement naturel ou forcé de ces thermosoudages, tandis que l'emballage des paquets en amont et en aval est maintenu à tout moment par les presses (63, 163, 63', 163'), ce qui évite même un minimum de sollicitation sur lesdits thermosoudages transversaux (ST1, ST2).
  10. Procédé selon les revendications précédentes, caractérisé en ce que pendant l'étape initiale de son cycle de fonctionnement, l'ensemble de coupe et de thermosoudage transversal (13) peut être fermé seulement en partie sur l'emballage tubulaire plié en soufflet (102') et dans cette condition partiellement fermée il peut être écarté lentement du mandrin formant le tube (1) de manière à se déplacer vers le paquet en aval (C1') et le comprime longitudinalement, après quoi le même ensemble (13) est complètement fermé et augmente sa vitesse de mouvement pour effectuer les étapes de coupe intermédiaire et de double thermosoudage transversal dont il est responsable.
EP16736628.5A 2015-07-10 2016-07-04 Machine d'emballage pour un produit unique ou des produits groupés et/ou empilés, dans des paquets de matériau thermoplastique obtenu à partir d'un film déroulé à partir d'un rouleau et procédé de fonctionnement associé Active EP3319878B1 (fr)

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PCT/IB2016/054007 WO2017009737A1 (fr) 2015-07-10 2016-07-04 Machine d'emballage pour un produit unique ou des produits groupés et/ou empilés, dans des paquets de matériau thermoplastique obtenu à partir d'un film déroulé à partir d'un rouleau et procédé de fonctionnement associé

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BR112017008204B1 (pt) * 2014-10-31 2022-07-19 Cps Company S.R.L Máquina de empacotamento com um carrossel de eixo horizontal, particularmente para empacotar rolos de papel ou embalagens de guardanapos de papel ou outros produtos sólidos de tamanho variável
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ITUB20152063A1 (it) 2017-01-10
US20190071199A1 (en) 2019-03-07
ES2806987T3 (es) 2021-02-19
BR112018000423B1 (pt) 2022-03-22
EP3319878A1 (fr) 2018-05-16
CN107848644B (zh) 2019-11-22
CN107848644A (zh) 2018-03-27
BR112018000423A2 (pt) 2018-09-11
WO2017009737A1 (fr) 2017-01-19
HK1252989A1 (zh) 2019-06-06
RS60742B1 (sr) 2020-10-30

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