WO2012032255A1 - Table for feeding a plastic film for a bundling machine - Google Patents

Table for feeding a plastic film for a bundling machine Download PDF

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Publication number
WO2012032255A1
WO2012032255A1 PCT/FR2011/052032 FR2011052032W WO2012032255A1 WO 2012032255 A1 WO2012032255 A1 WO 2012032255A1 FR 2011052032 W FR2011052032 W FR 2011052032W WO 2012032255 A1 WO2012032255 A1 WO 2012032255A1
Authority
WO
WIPO (PCT)
Prior art keywords
rollers
frame
pressure
roller
plastic film
Prior art date
Application number
PCT/FR2011/052032
Other languages
French (fr)
Inventor
Michael Vasse
Lionel Daniere
Grégory CHOPLIN
Original Assignee
Sidel Participations
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sidel Participations filed Critical Sidel Participations
Priority to MX2013002665A priority Critical patent/MX338765B/en
Priority to BR112013005322A priority patent/BR112013005322A2/en
Priority to EP11773033.3A priority patent/EP2614022B1/en
Priority to CN201180042785.3A priority patent/CN103209914B/en
Priority to US13/821,427 priority patent/US20130167477A1/en
Publication of WO2012032255A1 publication Critical patent/WO2012032255A1/en

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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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/08—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/16—Feeding webs from rolls by rollers
    • 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
    • B65H20/02—Advancing webs by friction roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/142—Roller pairs arranged on movable frame
    • B65H2404/1422—Roller pairs arranged on movable frame reciprocating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/144—Roller pairs with relative movement of the rollers to / from each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/81—Packaging machines

Definitions

  • the present invention relates to an improvement made to packaging machines for plastic film products and, in particular, machines called "shrink wrappers".
  • This type of machine makes it possible to wrap groups of products in a width cut from a film of suitable heat-shrinkable plastic material.
  • the shrinkwrapper comprises an injection table which comprises two pairs of spaced rollers: an upstream pair of rollers and a pair of downstream rollers with, in between, a cutting system of the plastic film to form the width.
  • the upstream pair of rollers constitutes the injection torque with at least one motorized roller and the downstream pair of rollers constitutes the tensioning torque also with a motorized roller.
  • the voltage torque is disposed downstream of the plastic film cutting system; it is located near the passage that prevails between the supply conveyor of the products to be packaged and the conveyor belt of the wrapping module where said products are wrapped by the width.
  • the cutting operation of the plastic film takes place between the two pairs of rolls of the injection table.
  • this plastic film is stretched between the injection torque and the tension torque and this tension results from an adjustment of the respective speeds of said pairs of rollers.
  • the rolls of the tensioning torque are driven by a speed which is substantially greater than that of the rollers of the injection torque.
  • This adhesion is good at the injection torque rollers which have a relatively large diameter and which each comprise a coating of rubber-like material; it is otherwise with the rollers of the tension torque because if one of the rolls, the motorized roller, has a large diameter with a coating of rubber-like material, the other roll has a relatively small diameter for space and space and, especially, it does not include a particularly adherent coating because it is made of steel for stiffness and to resist abrasion and wear.
  • plastic films that have thicknesses adapted to the products to be packaged.
  • the present invention proposes an arrangement at this injection table and in particular at the level of the voltage torque to obtain in a simple and permanent manner, a homogeneity of the contact pressure between the rollers and in particular over the entire width of said rollers. , that is to say over the entire width of the plastic film, that there is one or more plastic films passing through said injection table.
  • the injection table according to the invention comprises, on the path of a plastic film, upstream of a wrapping module, pairs of rollers for driving and tensioning said plastic film and a cutting system of said plastic film, which pairs of rollers are worn by a general table frame and are arranged, respectively, upstream and downstream of this cutting system, and is characterized in that one of said pairs of rollers, said torque voltage, disposed downstream of said cutting system, comprises a pressure roller which is motorized and, associated with this motorized pressure roller, at least two driven press rollers, which driven press rollers are arranged so as to constitute at least two pressure tracks applied on said plastic film which circulates between said motorized pressure roller and said driven pressure rollers, and in that each driven press roller is made of steel with a shaft carried by a roller frame, which roller frame is movable, guided on a beam which serves as a reference and which is integral with the frame of the injection table.
  • a foolproof pressure application system is interposed between the beam and each frame to constrain each of the driven press rollers and maintain tangential contact with the motorized pressure roller.
  • the pressure application system consists of at least one helical spring disposed on the reference beam, said spring being associated with a pusher which is guided relative to said beam, which pusher is in contact and in permanent support on the chassis of the driven pressure roller, urged by said spring, the number of pushers and / or springs being chosen to establish an appropriate pressure at said tension torque, comprising at least three pressure rollers.
  • each pressure element consisting of a spring and a pusher, is disposed in a borehole made in the thickness of the beam, which bore has at its end on the roller frame side, a shoulder which serves as a support for a base of said pusher and, at its other end, a plate acting as a shutter to serve as a support for said spring, said plate being removable to access said pressure element, that is to say at spring and pusher so that the value of the pressure between the pressure rollers can be changed and changed as needed.
  • the reference beam comprises, at its ends, fixing means on the frame of the injection table, and in particular on a part of this frame which is retractable to provide access to pairs of rollers and the cutting system.
  • the assembly constituted by the driven press rollers, their roller frames and the reference beam is in the form of a module, which module of pressed press rollers is provided with means of removable attachment of the screw type, to allow a convenient and convenient mounting on the frame of the injection table.
  • FIG. 1 shows a schematic elevation of the injection table installed on a packaging machine of a group or a batch of objects
  • FIG. 2 is a schematic view showing a module of pressed press rollers
  • FIG. 3 shows the detail of the pressure application system on a driven pressure roller.
  • Figure 1 shows, schematically, an injection table 1 found on machines of the shrink wrapper type.
  • This shrinkwrapper comprises, assembled on the same frame 2 general, a conveyor 3 which brings the products and product groups 4 on what corresponds to the module 5 wrapping itself.
  • the plastic film 6 which makes it possible to prepare widths, comes from a reel 7 which is installed on a reel 8 carried by the frame 2 of the machine. This plastic film is introduced between the conveyor 3 and the carpet 9 of the wrapping module 5, at the passage 10.
  • the plastic film 6 passes through the injection table 1 which comprises two pairs of rollers and, between these two pairs of rollers, there is a cutting system of said plastic film 6.
  • the injection table 1 therefore comprises:
  • a cutting system which comprises a rotary knife and a fixed counter knife.
  • the injection torque consisting of the rollers 11 and 12 is disposed upstream of the cutting system and the torque of the rollers 13 and 14 is disposed downstream of said cutting system.
  • Each pair of rollers comprises a motorized roller; thus, as shown in FIG. 1, the roll 11 and the roller 13 are motorized and the corresponding rollers 12 and 14 are simply conducted.
  • the rollers 11 and 13 motorized are preferably arranged on the fixed portion 2a of the frame 2; the rollers 12 and 14 conducted are arranged on the frame 2 also, but preferably on a part 2b of this frame 2 which opens the injection table and give access to the space between the rollers of each couple of rollers.
  • the plastic film 6 passes between these two pairs of rollers 11 to 14 and it also passes between guides 17, which guides 17 are fixed, integral with the frame 2, and they are associated, respectively, with each of these different rollers 11 to 14 .
  • the plastic film 6 also passes through the cutting system; it passes between the knife 15 and the counter knife 16 which are arranged so as to form, in the inactive cutting position, one and the other, guide members for said plastic film 6.
  • control means of the rollers 11 and 13 motors organize a slight difference in speed between these two rollers 11 and 13, which has the effect of producing a tension on the portion of the plastic film 6 which situated between this upstream roll 11 and this downstream roll 13.
  • the plastic film must be evenly stretched across its entire width.
  • the homogeneity of the contact pressure between the plastic film 6 and the rollers 13 and 14 pressers, over the entire width of said film 6, is obtained by arranging several pressure tracks along the width of said rollers, at least two tracks of pressure. These pressure tracks correspond to the area of application of a plurality of press rollers 14 carried on the motorized press roller 13.
  • two driven press rollers 14 are mounted, independently of one another, each in a frame 19, which frame 19 is carried by a beam 20 which acts as a reference beam with respect to the frame 2 of the machine and this beam 20 is secured to the general frame 1 of the machine through means which will be detailed later.
  • Each frame 19 comprises, at its ends, flanges 21 and 22 which receive the axis 23 of the roller 14 and this frame 19 is movable relative to the beam 20, guided appropriately by slide systems 24.
  • the slide systems 24 establish the travel d of the frame 19 relative to the beam 20.
  • This travel d between the frame 19 and the beam 20 is of the order of 2 mm for example.
  • each frame 19 and the beam 20 there is the presence of several elastic members. These elastic members are shown in detail in FIG. 3. They are housed in the beam 20, in a borehole 26 and are each constituted, as represented in FIG. 3, by a spring 27 and a pusher 28.
  • the spring 27 is interposed between the pusher 28 and a plate 29, which plate 29 is fixed on the beam 20 to close the bore 26.
  • the pusher 28 is in the form of a part of revolution whose central portion is in the form of a base 30, which base 30 serves as a bearing surface for the spring 27. Beyond the base 30, the side of the frame 19, the pusher 28 has a nipple 31 which takes support on said frame 19 and transmits to the latter the pressure of the spring 27.
  • the bore 26 comprises, on the side of the frame 19, a shoulder 32 which retains the pusher 28 at its base.
  • the plate 29 is fixed by screws 33 on the beam 20 and it allows easy access to the spring 27 and the pusher 28.
  • FIG. 2 shows the pressure rollers 14 integrated in a kind of module.
  • This module comprises, in the example shown, two independent rollers 14.
  • Each roller 14 is carried by a frame 19; these two frames 19 are independent of each other and they have their own pressure members 25 and their guide systems 24 cooperating with the reference beam 20.
  • the beam 20 comprises, at its ends, arrangements 34 which allow to secure it precisely on the part 2b of the frame 2 of the machine by means of screws 35 for fixing and centering, for example.
  • each pressure roller 14 The adjustment of the pressure that can be applied by each pressure roller 14 is feasible in two ways: either by a change of the pushers 28 whose base can be more or less thick, either by a change of the spring 27, or by means a change of the two, the pusher 28 and the spring 27, as needed.
  • This setting can be done directly in the factory, depending on the destination of the machine.
  • Such a setting, well chosen, has the advantage of being foolproof in normal use, because the pressure application elements are inaccessible without appropriate tools.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Advancing Webs (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

The invention relates to an feeding table, comprising a pair of rollers (13, 14), referred to as pressers, arranged downstream from the cutting system, said pair including a motor-driven roller (13) and at least two driven rollers (14) which are arranged so as to form at least two pressure tracks engaging with the plastic film (6) moving between said pair of rollers (13, 14). Each pressure track includes a driven roller (14), the shaft (23) of which is supported by a mobile frame (19) that is guided on a beam (20), wherein said beam (20) is secured to the general frame (2) and a foolproof system for applying pressure is provided between said beam (20) and said frame (19) in order to restrain said driven roller (14) and hold the latter in tangential contact with the motor-driven roller (13).

Description

TABLE D'INJECTION D'UN FILM PLASTIQUE POUR FARDELEUSE  INJECTION TABLE FOR A PLASTIC FILM FOR A FENDER
La présente invention concerne un perfectionnement apporté aux machines d'emballage de produits sous film plastique et, en particulier, aux machines dénommées " fardeleuses " . The present invention relates to an improvement made to packaging machines for plastic film products and, in particular, machines called "shrink wrappers".
Ce type de machines, comme décrit dans le document FR 2 823 190, permet d'envelopper des groupes de produits dans une laize découpée dans un film en matériau plastique thermorétractable approprié. This type of machine, as described in document FR 2 823 190, makes it possible to wrap groups of products in a width cut from a film of suitable heat-shrinkable plastic material.
Pour diriger l'extrémité du film plastique vers les produits, la fardeleuse comporte une table d'injection qui comprend deux couples de rouleaux espacés : un couple de rouleaux amont et un couple de rouleaux aval avec, entre les deux, un système de découpe du film plastique pour former la laize. Le couple de rouleaux amont constitue le couple d'injection avec au moins un rouleau motorisé et le couple de rouleaux aval constitue le couple de tension avec, lui aussi, un rouleau motorisé.  To direct the end of the plastic film towards the products, the shrinkwrapper comprises an injection table which comprises two pairs of spaced rollers: an upstream pair of rollers and a pair of downstream rollers with, in between, a cutting system of the plastic film to form the width. The upstream pair of rollers constitutes the injection torque with at least one motorized roller and the downstream pair of rollers constitutes the tensioning torque also with a motorized roller.
Le couple de tension est disposé en aval du système de découpe du film plastique ; il se situe à proximité du passage qui règne entre le convoyeur d'amenée des produits à emballer et le tapis convoyeur du module de fardelage où lesdits produits sont enveloppés par la laize.  The voltage torque is disposed downstream of the plastic film cutting system; it is located near the passage that prevails between the supply conveyor of the products to be packaged and the conveyor belt of the wrapping module where said products are wrapped by the width.
L'opération de découpe du film plastique s'effectue entre les deux couples de rouleaux de la table d' inj ection .  The cutting operation of the plastic film takes place between the two pairs of rolls of the injection table.
Pour obtenir une découpe franche et nette du film plastique, ce film plastique est tendu entre le couple d'injection et le couple de tension et cette tension découle d'un ajustement des vitesses respectives desdits couples de rouleaux. En effet, préalablement à l'opération de découpe et pendant cette opération de découpe, les rouleaux du couple de tension sont animés d'une vitesse qui est sensiblement supérieure à celle des rouleaux du couple d' inj ection . To obtain a clear and clean cut of the plastic film, this plastic film is stretched between the injection torque and the tension torque and this tension results from an adjustment of the respective speeds of said pairs of rollers. In fact, prior to the cutting operation and during this cutting operation, the rolls of the tensioning torque are driven by a speed which is substantially greater than that of the rollers of the injection torque.
La gestion de cette tension dans le film plastique ne dépend pas seulement de la différence des vitesses des couples de rouleaux disposés de part et d'autre du système de découpe, elle dépend aussi du contact entre le film et les différents rouleaux.  The management of this tension in the plastic film does not depend solely on the difference in the speeds of the pairs of rollers arranged on either side of the cutting system, it also depends on the contact between the film and the different rollers.
L'homogénéité du pincement du film plastique sur toute sa largeur, entre les rouleaux de chaque couple, est difficile à obtenir et, en plus, l'adhérence n'est pas la même selon le couple de rouleaux.  The homogeneity of the nip of the plastic film across its width, between the rollers of each pair, is difficult to obtain and, in addition, the adhesion is not the same depending on the pair of rollers.
Cette adhérence est bonne au niveau des rouleaux du couple d'injection qui ont un diamètre relativement important et qui comportent chacun un revêtement en matériau du type caoutchouc ; il en est autrement au niveau des rouleaux du couple de tension car si l'un des rouleaux, le rouleau motorisé, a un diamètre important avec un revêtement en matériau du type caoutchouc, l'autre rouleau a un diamètre relativement faible pour des questions d'encombrement et de place et, surtout, il ne comporte pas un revêtement particulièrement adhérent car il est réalisé en acier pour des questions de rigidité et pour pouvoir résister à l'abrasion et à l'usure.  This adhesion is good at the injection torque rollers which have a relatively large diameter and which each comprise a coating of rubber-like material; it is otherwise with the rollers of the tension torque because if one of the rolls, the motorized roller, has a large diameter with a coating of rubber-like material, the other roll has a relatively small diameter for space and space and, especially, it does not include a particularly adherent coating because it is made of steel for stiffness and to resist abrasion and wear.
On observe, sur la portion de film plastique qui se situe entre les couples de rouleaux, des déformations qui sont directement liées à des variations de tension du film plastique, sur sa largeur, entre les rouleaux du couple de tension et ceux du couple d'injection. Ces variations de tension dans cette portion de film génèrent des incidents lors des opérations de découpes . On the portion of the plastic film that lies between the pairs of rollers, deformations are observed which are directly related to variations in the tension of the plastic film, over its width, between the rolls of the torque of tension and those of the torque of injection. These variations of tension in this portion of film generate incidents during cutting operations.
Ces variations de tension ont plusieurs causes et il est difficile d'y remédier par un simple réglage de la pression entre les rouleaux du couple de tension.  These voltage variations have several causes and it is difficult to overcome by a simple adjustment of the pressure between the rollers of the voltage torque.
En effet, selon les produits à traiter, on peut être amené à utiliser différentes sortes de films plastiques et, en particulier des films plastiques qui ont des épaisseurs adaptées aux produits à emballer.  Indeed, depending on the products to be treated, it may be necessary to use different kinds of plastic films and, in particular plastic films that have thicknesses adapted to the products to be packaged.
Par ailleurs, pour un même film plastique, on peut observer des variations d'épaisseurs qui ne sont pas négligeables, atteignant parfois des valeurs de l'ordre de 30 % de l'épaisseur nominale.  Moreover, for the same plastic film, one can observe variations of thicknesses which are not negligible, sometimes reaching values of the order of 30% of the nominal thickness.
De plus, selon le type de machine, on peut être amené à injecter deux ou trois films plastiques sur le tapis du module de fardelage pour conditionner simultanément plusieurs groupes de produits qui sont disposés parallèlement les uns aux autres.  In addition, depending on the type of machine, it may be necessary to inject two or three plastic films on the carpet of the wrapping module to condition simultaneously several groups of products that are arranged parallel to each other.
La présente invention propose un aménagement au niveau de cette table d'injection et en particulier au niveau du couple de tension pour obtenir de façon simple et permanente, une homogénéité de la pression de contact entre les rouleaux et en particulier sur toute la largeur desdits rouleaux, c'est-à-dire sur toute la largeur du film plastique, qu'il y ait un ou plusieurs films plastiques traversant ladite table d'injection. The present invention proposes an arrangement at this injection table and in particular at the level of the voltage torque to obtain in a simple and permanent manner, a homogeneity of the contact pressure between the rollers and in particular over the entire width of said rollers. , that is to say over the entire width of the plastic film, that there is one or more plastic films passing through said injection table.
La table d'injection selon l'invention comporte, sur le parcours d'un film plastique, en amont d'un module de fardelage, des couples de rouleaux pour entraîner et tendre ledit film plastique et un système de découpe dudit film plastique, lesquels couples de rouleaux sont portés par un bâti de table général et sont disposés, respectivement, en amont et en aval de ce système de découpe, et se caractérise en ce que l'un desdits couples de rouleaux, dit couple de tension, disposé en aval dudit système de découpe, comprend un rouleau presseur qui est motorisé et, associés à ce rouleau presseur motorisé, au moins deux rouleaux presseurs menés, lesquels rouleaux presseurs menés sont disposés de façon à constituer au moins deux pistes de pression s 'appliquant sur ledit film plastique qui circule entre ledit rouleau presseur motorisé et lesdits rouleaux presseurs menés, et en ce que chaque rouleau presseur mené est réalisé en acier avec un axe porté par un châssis de rouleau, lequel châssis de rouleau est mobile, guidé sur une poutre qui fait office de référence et qui est solidaire du bâti de la table d' injection . The injection table according to the invention comprises, on the path of a plastic film, upstream of a wrapping module, pairs of rollers for driving and tensioning said plastic film and a cutting system of said plastic film, which pairs of rollers are worn by a general table frame and are arranged, respectively, upstream and downstream of this cutting system, and is characterized in that one of said pairs of rollers, said torque voltage, disposed downstream of said cutting system, comprises a pressure roller which is motorized and, associated with this motorized pressure roller, at least two driven press rollers, which driven press rollers are arranged so as to constitute at least two pressure tracks applied on said plastic film which circulates between said motorized pressure roller and said driven pressure rollers, and in that each driven press roller is made of steel with a shaft carried by a roller frame, which roller frame is movable, guided on a beam which serves as a reference and which is integral with the frame of the injection table.
Toujours selon l'invention, un système d'application de pression indéréglable est interposé entre la poutre et chaque châssis pour contraindre chacun des rouleaux presseurs menés et les maintenir en contact tangentiel avec le rouleau presseur motorisé.  Still according to the invention, a foolproof pressure application system is interposed between the beam and each frame to constrain each of the driven press rollers and maintain tangential contact with the motorized pressure roller.
Selon une disposition préférentielle de l'invention, le système d'application de pression est constitué d' au moins un ressort hélicoïdal disposé sur la poutre de référence, ledit ressort étant associé à un poussoir qui est guidé par rapport à ladite poutre, lequel poussoir est en contact et en appui permanent sur le châssis du rouleau presseur mené, sollicité par ledit ressort, le nombre de poussoirs et/ou de ressorts étant choisi pour établir une pression appropriée au niveau dudit couple de tension, comprenant au moins trois rouleaux presseurs. Toujours selon l'invention, chaque élément de pression, constitué d'un ressort et d'un poussoir, est disposé dans un forage réalisé dans l'épaisseur de la poutre, lequel forage comporte à son extrémité côté châssis de rouleau, un épaulement qui sert d'appui pour une embase dudit poussoir et, à son autre extrémité, une plaque faisant office d'obturateur pour servir d'appui audit ressort, ladite plaque étant amovible pour accéder audit élément de pression, c'est-à-dire au ressort et au poussoir afin de pouvoir modifier la valeur de la pression entre les rouleaux presseurs et en changer selon les besoins . According to a preferred embodiment of the invention, the pressure application system consists of at least one helical spring disposed on the reference beam, said spring being associated with a pusher which is guided relative to said beam, which pusher is in contact and in permanent support on the chassis of the driven pressure roller, urged by said spring, the number of pushers and / or springs being chosen to establish an appropriate pressure at said tension torque, comprising at least three pressure rollers. Still according to the invention, each pressure element, consisting of a spring and a pusher, is disposed in a borehole made in the thickness of the beam, which bore has at its end on the roller frame side, a shoulder which serves as a support for a base of said pusher and, at its other end, a plate acting as a shutter to serve as a support for said spring, said plate being removable to access said pressure element, that is to say at spring and pusher so that the value of the pressure between the pressure rollers can be changed and changed as needed.
Selon une autre disposition de l'invention, la poutre de référence comporte, à ses extrémités, des moyens de fixation sur le bâti de la table d'injection, et en particulier sur une partie de ce bâti qui est escamotable pour offrir un accès aux couples de rouleaux et au système de découpe.  According to another embodiment of the invention, the reference beam comprises, at its ends, fixing means on the frame of the injection table, and in particular on a part of this frame which is retractable to provide access to pairs of rollers and the cutting system.
Selon une disposition préférentielle de l'invention, l'ensemble constitué par les rouleaux presseurs menés, leurs châssis de rouleau et la poutre de référence, se présente sous la forme d'un module, lequel module de rouleaux presseurs menés est muni de moyens de fixation amovible du genre vis, pour permettre un montage pratique et commode sur le bâti de la table d'injection.  According to a preferred arrangement of the invention, the assembly constituted by the driven press rollers, their roller frames and the reference beam, is in the form of a module, which module of pressed press rollers is provided with means of removable attachment of the screw type, to allow a convenient and convenient mounting on the frame of the injection table.
Pour pouvoir être exécutée, l'invention est exposée de façon suffisamment claire et complète dans la description suivante qui, en plus, est accompagnée de dessins dans lesquels : In order to be executed, the invention is set forth in a sufficiently clear and complete manner in the following description which, in addition, is accompanied by drawings in which:
- la figure 1 représente une élévation schématique de la table d'injection installée sur une machine de conditionnement d'un groupe ou d'un lot d'objets ; - la figure 2 est une vue schématique montrant un module de rouleaux presseurs menés ; - Figure 1 shows a schematic elevation of the injection table installed on a packaging machine of a group or a batch of objects; FIG. 2 is a schematic view showing a module of pressed press rollers;
- la figure 3 montre le détail du système d'application de la pression sur un rouleau presseur mené.  - Figure 3 shows the detail of the pressure application system on a driven pressure roller.
La figure 1 montre, de façon schématique, une table 1 d'injection que l'on trouve sur les machines du type fardeleuse.  Figure 1 shows, schematically, an injection table 1 found on machines of the shrink wrapper type.
Cette fardeleuse comprend, rassemblés sur un même bâti 2 général, un convoyeur 3 qui amène les produits et groupes de produits 4 sur ce qui correspond au module 5 de fardelage proprement dit.  This shrinkwrapper comprises, assembled on the same frame 2 general, a conveyor 3 which brings the products and product groups 4 on what corresponds to the module 5 wrapping itself.
Le film 6 plastique qui permet de préparer des laizes, provient d'une bobine 7 qui est installée sur un dévidoir 8 porté par le bâti 2 de la machine. Ce film plastique est introduit entre le convoyeur 3 et le tapis 9 du module 5 de fardelage, au niveau du passage 10.  The plastic film 6 which makes it possible to prepare widths, comes from a reel 7 which is installed on a reel 8 carried by the frame 2 of the machine. This plastic film is introduced between the conveyor 3 and the carpet 9 of the wrapping module 5, at the passage 10.
Le film 6 plastique traverse la table 1 d'injection qui comprend deux couples de rouleaux et, entre ces deux couples de rouleaux, on trouve un système de découpe dudit film 6 plastique.  The plastic film 6 passes through the injection table 1 which comprises two pairs of rollers and, between these two pairs of rollers, there is a cutting system of said plastic film 6.
La table 1 d'injection comprend donc :  The injection table 1 therefore comprises:
- un premier couple de rouleaux 11 et 12, dénommé couple d'injection ;  a first pair of rollers 11 and 12, referred to as the injection torque;
- un second couple de rouleaux 13 et 14, dénommés couple de tension ;  a second pair of rollers 13 and 14, referred to as voltage torque;
- un système de découpe qui comprend un couteau 15 rotatif et un contre-couteau 16 fixe.  a cutting system which comprises a rotary knife and a fixed counter knife.
Le couple d'injection constitué des rouleaux 11 et 12 est disposé en amont du système de découpe et le couple de tension constitué des rouleaux 13 et 14 est disposé en aval dudit système de découpe.  The injection torque consisting of the rollers 11 and 12 is disposed upstream of the cutting system and the torque of the rollers 13 and 14 is disposed downstream of said cutting system.
Chaque couple de rouleaux comprend un rouleau motorisé ; ainsi, comme représenté figure 1, le rouleau 11 et le rouleau 13 sont motorisés et les rouleaux 12 et 14 correspondants sont simplement menés. Les rouleaux 11 et 13 motorisés sont, de préférence, disposés sur la partie 2a fixe du bâti 2 ; les rouleaux 12 et 14 menés sont disposés sur le bâti 2 également, mais, de préférence, sur une partie 2b de ce bâti 2 qui permet d'ouvrir la table d'injection et de donner accès à l'espace entre les rouleaux de chaque couple de rouleaux. Each pair of rollers comprises a motorized roller; thus, as shown in FIG. 1, the roll 11 and the roller 13 are motorized and the corresponding rollers 12 and 14 are simply conducted. The rollers 11 and 13 motorized are preferably arranged on the fixed portion 2a of the frame 2; the rollers 12 and 14 conducted are arranged on the frame 2 also, but preferably on a part 2b of this frame 2 which opens the injection table and give access to the space between the rollers of each couple of rollers.
Le film 6 plastique passe entre ces deux couples de rouleaux 11 à 14 et il passe également entre des guides 17, lesquels guides 17 sont fixes, solidaires du bâti 2, et ils sont associés, respectivement, à chacun de ces différents rouleaux 11 à 14.  The plastic film 6 passes between these two pairs of rollers 11 to 14 and it also passes between guides 17, which guides 17 are fixed, integral with the frame 2, and they are associated, respectively, with each of these different rollers 11 to 14 .
Le film 6 plastique traverse également le système de découpe ; il passe entre le couteau 15 et le contre- couteau 16 qui sont disposés de façon à former, en position inactive de découpe, l'un et l'autre, des organes de guidage pour ledit film 6 plastique.  The plastic film 6 also passes through the cutting system; it passes between the knife 15 and the counter knife 16 which are arranged so as to form, in the inactive cutting position, one and the other, guide members for said plastic film 6.
Pour réaliser l'opération de découpe, les moyens de commande des rouleaux 11 et 13 moteurs organisent une légère différence de vitesse entre ces deux rouleaux 11 et 13, ce qui a pour effet de réaliser une tension sur la portion du film 6 plastique qui se situe entre ce rouleau 11 amont et ce rouleau 13 aval.  To perform the cutting operation, the control means of the rollers 11 and 13 motors organize a slight difference in speed between these two rollers 11 and 13, which has the effect of producing a tension on the portion of the plastic film 6 which situated between this upstream roll 11 and this downstream roll 13.
Pour obtenir une coupe franche et nette, le film 6 plastique doit être tendu de façon uniforme sur toute sa largeur .  To obtain a clean and clean cut, the plastic film must be evenly stretched across its entire width.
L'homogénéité de la pression de contact entre le film 6 plastique et les rouleaux 13 et 14 presseurs, sur toute la largeur dudit film 6, est obtenue par un aménagement de plusieurs pistes de pression sur la largeur desdits rouleaux, au moins deux pistes de pression. Ces pistes de pression correspondent à la zone d'application de plusieurs rouleaux 14 presseurs menés sur le rouleau 13 presseur motorisé. The homogeneity of the contact pressure between the plastic film 6 and the rollers 13 and 14 pressers, over the entire width of said film 6, is obtained by arranging several pressure tracks along the width of said rollers, at least two tracks of pressure. These pressure tracks correspond to the area of application of a plurality of press rollers 14 carried on the motorized press roller 13.
Comme représenté sur la figure 2, deux rouleaux 14 presseurs menés sont montés, indépendamment l'un de l'autre, chacun dans un châssis 19, lequel châssis 19 est porté par une poutre 20 qui fait office de poutre de référence par rapport au bâti 2 de la machine et cette poutre 20 est solidaire du bâti 1 général de la machine par le biais de moyens qui seront détaillés plus loin.  As shown in FIG. 2, two driven press rollers 14 are mounted, independently of one another, each in a frame 19, which frame 19 is carried by a beam 20 which acts as a reference beam with respect to the frame 2 of the machine and this beam 20 is secured to the general frame 1 of the machine through means which will be detailed later.
Chaque châssis 19 comporte, à ses extrémités, des flasques 21 et 22 qui reçoivent l'axe 23 du rouleau 14 et ce châssis 19 est mobile par rapport à la poutre 20, guidé de façon appropriée par des systèmes de glissières 24.  Each frame 19 comprises, at its ends, flanges 21 and 22 which receive the axis 23 of the roller 14 and this frame 19 is movable relative to the beam 20, guided appropriately by slide systems 24.
Les systèmes de glissières 24 établissent la course d du châssis 19 par rapport à la poutre 20. Cette course d entre le châssis 19 et la poutre 20 est de l'ordre de 2 mm par exemple.  The slide systems 24 establish the travel d of the frame 19 relative to the beam 20. This travel d between the frame 19 and the beam 20 is of the order of 2 mm for example.
Entre chaque châssis 19 et la poutre 20, on remarque la présence de plusieurs organes 25 élastiques. Ces organes 25 élastiques sont représentés de façon détaillée figure 3. Ils sont logés dans la poutre 20, dans un forage 26 et sont chacun constitués, comme représenté figure 3, d'un ressort 27 et d'un poussoir 28.  Between each frame 19 and the beam 20, there is the presence of several elastic members. These elastic members are shown in detail in FIG. 3. They are housed in the beam 20, in a borehole 26 and are each constituted, as represented in FIG. 3, by a spring 27 and a pusher 28.
Le ressort 27 s'interpose entre le poussoir 28 et une plaque 29, laquelle plaque 29 est fixée sur la poutre 20 pour obturer le forage 26.  The spring 27 is interposed between the pusher 28 and a plate 29, which plate 29 is fixed on the beam 20 to close the bore 26.
Le poussoir 28 se présente sous la forme d'une pièce de révolution dont la partie centrale est en forme d'embase 30, laquelle embase 30 sert de surface d'appui pour le ressort 27. Au-delà de l'embase 30, du côté du châssis 19, le poussoir 28 comporte un téton 31 qui prend appui sur ledit châssis 19 et transmet à ce dernier la pression du ressort 27. The pusher 28 is in the form of a part of revolution whose central portion is in the form of a base 30, which base 30 serves as a bearing surface for the spring 27. Beyond the base 30, the side of the frame 19, the pusher 28 has a nipple 31 which takes support on said frame 19 and transmits to the latter the pressure of the spring 27.
Le forage 26 comporte, du côté du châssis 19, un épaulement 32 qui retient le poussoir 28 au niveau de son embase .  The bore 26 comprises, on the side of the frame 19, a shoulder 32 which retains the pusher 28 at its base.
La plaque 29 est fixée par des vis 33 sur la poutre 20 et elle permet un accès facile au ressort 27 et au poussoir 28.  The plate 29 is fixed by screws 33 on the beam 20 and it allows easy access to the spring 27 and the pusher 28.
La figure 2 montre les rouleaux 14 presseurs intégrés dans une sorte de module. Ce module comprend, dans l'exemple représenté, deux rouleaux 14 indépendants. Chaque rouleau 14 est porté par un châssis 19 ; ces deux châssis 19 sont indépendants l'un par rapport à l'autre et ils comportent leurs propres organes 25 de pression et leurs systèmes 24 de guidage coopérant avec la poutre 20 de référence.  Figure 2 shows the pressure rollers 14 integrated in a kind of module. This module comprises, in the example shown, two independent rollers 14. Each roller 14 is carried by a frame 19; these two frames 19 are independent of each other and they have their own pressure members 25 and their guide systems 24 cooperating with the reference beam 20.
La poutre 20 comporte, à ses extrémités, des aménagements 34 qui permettent de la solidariser de manière précise sur la partie 2b du bâti 2 de la machine au moyen de vis 35 de fixation et de centrage, par exemple.  The beam 20 comprises, at its ends, arrangements 34 which allow to secure it precisely on the part 2b of the frame 2 of the machine by means of screws 35 for fixing and centering, for example.
Le réglage de la pression susceptible d'être appliquée par chaque rouleau 14 presseur est réalisable de deux façons : soit par un changement des poussoirs 28 dont l'embase peut être plus ou moins épaisse, soit par un changement du ressort 27, soit au moyen d'un changement des deux, du poussoir 28 et du ressort 27, en fonction des besoins .  The adjustment of the pressure that can be applied by each pressure roller 14 is feasible in two ways: either by a change of the pushers 28 whose base can be more or less thick, either by a change of the spring 27, or by means a change of the two, the pusher 28 and the spring 27, as needed.
Ce réglage peut se faire directement en usine, selon la destination de la machine. Un tel réglage, bien choisi, présente l'avantage d'être indéréglable en utilisation normale, du fait que les éléments d'application de la pression sont inaccessibles sans outils appropriés.  This setting can be done directly in the factory, depending on the destination of the machine. Such a setting, well chosen, has the advantage of being foolproof in normal use, because the pressure application elements are inaccessible without appropriate tools.

Claims

REVENDICATIONS
1. Table d'injection comportant, sur le parcours d'un film (6) plastique, en amont d'un module (5) de fardelage, des couples de rouleaux pour entraîner et tendre ledit film (6) plastique et un système de découpe dudit film plastique, lesquels couples de rouleaux sont portés par un bâti (2) de table et sont disposés, respectivement, en amont et en aval de ce système de découpe, 1. Injection table comprising, on the path of a plastic film (6), upstream of a wrapping module (5), pairs of rollers for driving and tensioning said plastic film (6) and a wrapping system. cutting said plastic film, which pairs of rollers are carried by a table frame (2) and are arranged respectively upstream and downstream of this cutting system,
caractérisée en ce que l'un desdits couples de rouleaux (13, 14) dit couple de tension , disposé en aval dudit système de découpe, comprend un rouleau presseur (13) qui est motorisé et, associés à ce rouleau presseur (13) motorisé, au moins deux rouleaux presseurs (14) menés, lesquels rouleaux presseurs menés sont disposés de façon à constituer au moins deux pistes de pression s 'appliquant sur ledit film (6) plastique qui circule entre ledit rouleau presseur motorisé (13) et lesdits rouleaux presseurs menés (14), et characterized in that one of said pairs of rollers (13, 14) said tensioning torque, disposed downstream of said cutting system, comprises a pressure roller (13) which is motorized and, associated with this pressure roller (13) motorized at least two driven press rollers (14), which driven press rollers are arranged to form at least two pressure tracks applied to said plastic film (6) which flows between said motorized press roll (13) and said rollers led pressers (14), and
en ce que chaque rouleau (14) presseur mené est réalisé en acier avec un axe (23) porté par un châssis (19) de rouleau, lequel châssis (19) de rouleau est mobile, guidé sur une poutre (20) qui fait office de référence et qui est solidaire du bâti (2) de la table d' inj ection .  in that each driven press roller (14) is made of steel with a shaft (23) carried by a roller frame (19), which roller frame (19) is movable, guided on a beam (20) which serves reference and which is integral with the frame (2) of the injection table.
2. Table d'injection selon la revendication 1, caractérisée en ce qu'elle comporte un système d'application de pression indéréglable interposé entre la poutre (20) et chaque châssis (19) de rouleau pour contraindre chacun des rouleaux (14) presseurs menés et les maintenir en contact tangentiel avec le rouleau (13) presseur motorisé. 2. Injection table according to claim 1, characterized in that it comprises a foolproof pressure application system interposed between the beam (20) and each frame (19) of roll to constrain each of the rollers (14) pressers conducted and maintain tangential contact with the roller (13) motorized presser.
3. Table d'injection selon la revendication 2, caractérisée en ce que le système d'application de pression est constitué d'au moins un ressort (27) hélicoïdal disposé sur la poutre (20), ledit ressort (27) étant associé à un poussoir (28) qui est guidé par rapport à ladite poutre (20), lequel poussoir (28) est en contact et en appui permanent sur le châssis (19) du rouleau (14) presseur mené, sollicité par ledit ressort (27), le nombre de poussoirs (28) et/ou de ressorts (27) étant choisi pour établir une pression appropriée au niveau dudit couple de tension, comprenant au moins trois rouleaux (13, 14) presseurs . Injection table according to claim 2, characterized in that the pressure application system consists of at least one helical spring (27) disposed on the beam (20), said spring (27) being associated with a pusher (28) which is guided relative to said beam (20), which pusher (28) is in contact and in permanent support on the frame (19) of the driven press roller (14), biased by said spring (27) the number of pushers (28) and / or springs (27) being selected to establish an appropriate pressure at said voltage torque, comprising at least three press rollers (13, 14).
4. Table d'injection selon la revendication 3, caractérisée en ce que chaque élément (25) de pression constitué d'un ressort (27) et d'un poussoir (28) est disposé dans un forage (26) réalisé dans l'épaisseur de la poutre (20) , lequel forage (26) comporte à son extrémité côté châssis (19) de rouleau, un épaulement (32) qui sert d'appui pour une embase (30) dudit poussoir (28) et, à son autre extrémité, une plaque (29) faisant office d'obturateur pour servir d'appui audit ressort (27), ladite plaque (29) étant amovible pour accéder audit élément de pression, c'est-à-dire au ressort (27) et au poussoir (28) afin de pouvoir modifier la valeur de la pression entre les rouleaux presseurs (13, 14) et en changer selon les besoins.  4. Injection table according to claim 3, characterized in that each element (25) of pressure consisting of a spring (27) and a pusher (28) is arranged in a borehole (26) made in the thickness of the beam (20), which bore (26) has at its end of the frame side (19) of a roller, a shoulder (32) which serves as a support for a base (30) of said pusher (28) and, at its another end, a plate (29) serving as a shutter for supporting said spring (27), said plate (29) being removable to access said pressure element, that is to say the spring (27) and the pusher (28) in order to be able to modify the value of the pressure between the pressure rollers (13, 14) and change it as required.
5. Table d'injection selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la poutre (20) de référence comporte, à ses extrémités, des moyens de fixation sur le bâti (2) de table.  5. Injection table according to any one of claims 1 to 4, characterized in that the beam (20) comprises reference at its ends, fixing means on the frame (2) table.
6. Table d'injection selon la revendication 5, caractérisée en ce que lesdits moyens de fixation fixent les extrémités de ladite poutre sur une partie (2b) du bâti (2) de table qui est escamotable pour offrir un accès aux couples de rouleaux et au système de découpe. 6. injection table according to claim 5, characterized in that said fixing means fix the ends of said beam on a portion (2b) of the table frame (2) which is retractable to provide access to the pairs of rollers and the cutting system.
7. Table d'injection selon l'une des revendications 5 et 6, caractérisée en ce que l'ensemble constitué par les rouleaux (14) presseurs menés, leurs châssis (19) de rouleau et la poutre (20) de référence, se présente sous la forme d'un module, lequel module de rouleaux (14) presseurs menés est muni de moyens de fixation amovible, du genre vis, pour permettre un montage pratique et commode sur le bâti (2) de table.  7. Injection table according to one of claims 5 and 6, characterized in that the assembly consisting of the driven rollers (14), their frame (19) of the roller and the beam (20) of reference, present in the form of a module, which driven press roller module (14) is provided with removable fastening means, screw type, to allow convenient and convenient mounting on the table frame (2).
PCT/FR2011/052032 2010-09-08 2011-09-06 Table for feeding a plastic film for a bundling machine WO2012032255A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
MX2013002665A MX338765B (en) 2010-09-08 2011-09-06 Table for feeding a plastic film for a bundling machine.
BR112013005322A BR112013005322A2 (en) 2010-09-08 2011-09-06 table for feeding a plastic film to a wrapping machine
EP11773033.3A EP2614022B1 (en) 2010-09-08 2011-09-06 Table for feeding a plastic film for a bundling machine
CN201180042785.3A CN103209914B (en) 2010-09-08 2011-09-06 For supply with the loading bay of plastic foil to baling press
US13/821,427 US20130167477A1 (en) 2010-09-08 2011-09-06 Table for feeding a plastic film for a bundling machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1057115 2010-09-08
FR1057115A FR2964375B1 (en) 2010-09-08 2010-09-08 INJECTION TABLE FOR A PLASTIC FILM FOR A FENDER

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WO2012032255A1 true WO2012032255A1 (en) 2012-03-15

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US (1) US20130167477A1 (en)
EP (1) EP2614022B1 (en)
CN (1) CN103209914B (en)
BR (1) BR112013005322A2 (en)
FR (1) FR2964375B1 (en)
MX (1) MX338765B (en)
WO (1) WO2012032255A1 (en)

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CN103303533A (en) * 2013-05-29 2013-09-18 广东一鼎科技有限公司 Device for stacking plates and sandwiching shock insulators among plates
CN106562689A (en) * 2015-10-10 2017-04-19 漳州灿坤实业有限公司 Puncture mechanism of storage box
CN106562689B (en) * 2015-10-10 2019-05-07 漳州灿坤实业有限公司 The piercing mechanism of material-storing box

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FR2964375A1 (en) 2012-03-09
US20130167477A1 (en) 2013-07-04
MX338765B (en) 2016-04-28
MX2013002665A (en) 2013-04-09
BR112013005322A2 (en) 2016-08-16
EP2614022B1 (en) 2015-02-25
FR2964375B1 (en) 2013-05-17
CN103209914B (en) 2016-05-18
CN103209914A (en) 2013-07-17
EP2614022A1 (en) 2013-07-17

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