WO2017129703A1 - Perforation d'arêtes de film - Google Patents

Perforation d'arêtes de film Download PDF

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Publication number
WO2017129703A1
WO2017129703A1 PCT/EP2017/051689 EP2017051689W WO2017129703A1 WO 2017129703 A1 WO2017129703 A1 WO 2017129703A1 EP 2017051689 W EP2017051689 W EP 2017051689W WO 2017129703 A1 WO2017129703 A1 WO 2017129703A1
Authority
WO
WIPO (PCT)
Prior art keywords
film web
perforation
roller
film
holes
Prior art date
Application number
PCT/EP2017/051689
Other languages
German (de)
English (en)
Inventor
Thomas Sehlleier
Karsten Golubski
Original Assignee
Windmöller & Hölscher Kg
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 Windmöller & Hölscher Kg filed Critical Windmöller & Hölscher Kg
Priority to EP17703673.8A priority Critical patent/EP3408064A1/fr
Publication of WO2017129703A1 publication Critical patent/WO2017129703A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/24—Perforating by needles or pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
    • B26D5/34—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier scanning being effected by a photosensitive device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • B26F1/20—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material with tools carried by a rotating drum or similar support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B29C55/065—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed in several stretching steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B23K26/382—Removing material by boring or cutting by boring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0045—Perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping

Definitions

  • the present invention relates to a device for preventing dust blows in the production of a double, laid flat film web and a method for producing a film web.
  • films are usually produced as continuous material.
  • such a film web is often produced in a blown head, wherein a film bubble produced in this way can then be made into a double, flat film web.
  • Such film webs are then wound at the end of the production process mostly in winding machines on sleeves.
  • residual air still remains between the layers of the double, flat-laid film web. This can lead to, for example, before production devices, this air accumulates in dust bubbles. If such a dusting bubble becomes too large, the film can touch and / or drag surrounding components of the production devices, for example on traverses and / or rollers, which usually leads to a foil tear. A time-consuming and costly production stop is inevitable in this case.
  • this method has the disadvantage that also this section of the film must be regarded as scrap material. Furthermore, this method involves the risk that in the absence of manual removal of dust Staublase a complete demolition of the film web may occur, which in turn leads to a machine stop and thereby can lead to a time-consuming and costly production downtime.
  • the object is achieved by a device for preventing dust accumulation in the production of a double, laid flat film web, comprising a perforation device with at least one perforation element, wherein the at least one perforation element is positioned such that when arranging the perforation device on the film web, the perforation element penetrates the film web and thereby generates through holes in the film web in an edge region of the film web.
  • a device according to the invention can be used in the production of a double, flat-laid film web.
  • a device according to the invention has in particular a perforation device with at least one perforation element.
  • a perforation device preferably has a plurality of perforation elements.
  • the perforation device is further equipped with the necessary in particular for an arrangement, storage and / or management of the perforation elements components.
  • the perforation device of the device according to the invention can be arranged on the film web.
  • the perforation element is positioned such that, when the perforation device is arranged on the film web, the perforation element can penetrate and / or penetrate the film web.
  • Penetration in the sense of the invention means in particular that the perforation element passes through both layers of the double, flat-laid film web, ie, that the perforation penetrates on an inlet side in the double, flat-laid film web and on the inlet side facing away from the exit side of the film web again exit.
  • This penetration of the film web through the perforation element is preferably carried out repeatedly along the film web, wherein the at least one perforation element after penetrating the film web from the film web again Will get removed. In this way it can be ensured that through holes are produced by the perforation in the film web and in particular no long cut is introduced into the film web, by which in turn could be done separating a film area.
  • Through holes in the sense of the invention are continuous from the inlet side just described to the outlet side.
  • edge regions in the sense of the invention are in particular those regions on the edge of the film web, ie. h., Seen at the lateral ends of the film web, which are usually present in a production process of the film web production as waste material and removed in a later production step.
  • edge regions arise in a stretching process in which a film web is stretched, in particular along its longitudinal extent.
  • MDO machines machine directed orientation
  • the film web is passed over a plurality of rollers which have an increasing rotational speed along the film web and in this way stretch the film web along its longitudinal direction.
  • This usually leads to a constriction of the film web and to a thickening of the film web just at the edge regions of the film web.
  • Such an edge region may, for example, preferably extend approximately 50 mm from a lateral end of the film web in the direction of the center of the film web. Since these edge regions are removed in a later production step, it can be prevented by introducing the through holes into such an edge region additional film broke is produced in the production of the film web. A reduction in production costs in the production of the double, flat-laid film web can be achieved.
  • the through-holes can be introduced into the material of the film web in different ways.
  • perforations for example with a needle or a knife, are just as conceivable as cuts, in particular in a discontinuous manner, with a corresponding cutting edge.
  • Under the edge region is to be understood in particular the range of about 0 to 300 mm at the edge of the film web.
  • an edge distance of approximately 20 mm can be maintained or predetermined. If the through holes are a round opening cross-section, diameters in the range between approximately 0.01 mm and 10 mm are conceivable.
  • the at least one perforation element has a displacement section for the displacement of material of the film web without material removal during the production of the through-holes.
  • a displacement section of the at least one perforation element can be formed, for example, by an increasing thickening behind a point or a cutting edge. The tip or the cutting edge thus produces an initial opening as a small hole or as a small cut in the material of the film web.
  • the displacement section is moved further into this initial opening by a relative movement of the at least one perforation element to the film web. Since the film web is in particular a plastic web, the material of the film web deviates from the penetrating displacement section and thereby deforms at least partially permanently or plastically. If the displacement section or the entire perforation element is subsequently pulled out of the through hole, which has now been formed by plastic deformation, this essentially remains stable in the edge region due to the plastic deformation. The deformation described here by the displacement section takes place in particular in a combination of plastic and elastic deformation. In other words, after the removal of the perforation element, the through hole will again shrink by the amount of elastic deformation.
  • the displacer portion is provided with a larger cross-section, for example with an excess of 5% to 20%, than the desired size of the through-hole.
  • the perforation element and / or the displacement section can be made exchangeable for an adaptation of the excess of the material properties of the film web.
  • the perforation device has a control unit with a sensor means for detecting the edge region, wherein the control unit further comprises an alignment means for aligning the at least one perforation element on the detected edge region.
  • the sensor means is in particular equipped with optical and / or mechanical sensors. The detection of the edge region allows the control device to adapt the perforation element during operation to changing geometric conditions of the film web. Thus, when changing the production, an automatic readjustment can take place. It is also possible to ensure fluctuations in the overall width of the film web that the prevention of dust accumulation takes place in accordance with the invention. The safety in the insertion of the through holes is further increased in this way.
  • the at least one perforation element when arranging the perforation device on the film web, the at least one perforation element generates through holes in the film web in both edge regions of the film web. Border areas, d. H. Areas that are present in the production of the film web due to production as broke, are usually present at both lateral ends of the film web. By introducing through holes in both edge regions of the film web, a total of more through holes are generally arranged in the film web. An escape of air between the layers of the film web can be further improved. A formation of dust bubbles between the layers of the film web can thus be prevented even safer.
  • the perforation device may for example have a perforation element which can be arranged alternately between the two edge regions of the film web.
  • a perforation device of a device according to the invention also have a plurality of perforation elements, wherein a part of the perforation elements can be arranged on an edge region and the other part on the other edge region of the film web. In this way, an introduction of through holes in both edge regions of the film web can be provided in a particularly simple manner.
  • a device according to the invention can be designed such that the at least one perforation element is at least one of the following devices:
  • Each of these devices is designed to completely penetrate one and / or preferably both layers of the double, flat-laid film web and thus be able to introduce through holes into the film web.
  • This list is not completed, so that other devices, where technically possible and useful, can be used as perforation elements.
  • a suitable wire element can be used as a device or perforation element.
  • provision may additionally be made to heat the device or the perforation element, in particular to heat it up.
  • a penetration of one and in particular of both layers of the film web through the device or the perforation element can thereby be further simplified and thus improved.
  • a particularly suitable device can be used in each case by the various devices for film webs of different materials. A particularly simple and secure introduction of through holes at the edge region of the film web can be ensured in particular for different film materials.
  • the at least one perforation of the film web arranged perforating device is mounted alternately movable between at least two positions, that it is arranged in a first position away from the film web and in a second position, the film web penetrates.
  • the perforation element may be a knife and / or a cutting edge, which is mounted so as to be alternately movable in the perforation device such that it projects at different distances, for example from a housing of the perforation device.
  • the perforation device is then preferably arranged so close to the film web, which is moved past it, that upon movement of the perforation between its first and its second position penetrates the film web, so that a through hole is introduced into the film web.
  • the perforation device comprises a roller on which the at least one perforation element is arranged, wherein the roller in such a Storage device is rotatably storable, that the rotatably mounted roller, the film web contacted in rotation while the at least one perforation penetrates the at least one edge region of the film web to produce the through holes.
  • a film web moves in the direction of its longitudinal extent during production.
  • a roll rotatably mounted in a bearing device can be arranged on the film web in such a way that it rotates with this longitudinal movement of the film web.
  • a perforation device which has such a roller and the perforation element is arranged on this roller, it can thus be ensured in a particularly simple manner that the perforation element securely penetrates the edge region of the film web and, secondly, that this perforation element penetrates through the film web Rotation of the roller from the film web is also retracted again.
  • perforation elements in this embodiment of a device according to the invention for example, needles may be used preferably.
  • An introduction of through-holes can thus also be ensured particularly easily in this alternative manner.
  • a complete separation of an additional edge region by introducing a slot by means of a longitudinal cutting blade in the film web, whereby a high scrap of material would occur, can thus be safely avoided by this alternative embodiment of a device according to the invention.
  • a device according to the invention can be further developed such that the device has a clamping device mechanically operatively connected to the roller of the perforation device, wherein a tensioning force for arranging the film web on the roller on the film web can be exerted by the tensioning device via the roller.
  • a tensioning device By such a tensioning device, the roller is pressed against the film web.
  • a tension force is exerted on the film web via the roller, which ensures that the film web bears against the roller.
  • it can further be ensured that the film web is reliably contacted by the roller of the perforation device at all times.
  • the at least one perforation element which is arranged on the roller of the perforation device is also designed to penetrate the film web at all times and thus to introduce the through holes into the film web. A removal of the Film web from the roller and thus interrupting the introduction of the through holes in the film web can be safely avoided in this way.
  • the perforation device has a counter-roller for arranging the film web on the roller.
  • a counter roll By a corresponding arrangement of such a counter roll can be made possible that the device between the counter roll and the roller is guided.
  • the film web can be pressed against the roll by the counter roll, which in turn can ensure the introduction of through holes through the arranged on the roller at least one perforation element. In this way, an interruption of an introduction of through holes in the film web can thus be reliably avoided.
  • a device can be further developed such that the counter roller for receiving the at least one perforation element is elastic at least in sections and / or has a groove.
  • the at least one perforation protrudes for introducing the through holes in the film web mostly over a surface of the roller on which the film web is guided out.
  • the counter-roller is also usually arranged so close to the roller that the film web is guided between the counter-roller and the roller. In order to avoid damaging the perforation elements by the counter-roller, this is at least partially elastic or has a groove.
  • the elastic region of the counter-roller or the groove are in this case arranged on the counter-roller such that the perforation element can be received in this elastic region and / or in the groove. Damage to the perforation by the mating roll can be safely avoided in this way.
  • the at least one perforation element in the perforation device and / or the perforation device may also be particularly preferable for the at least one perforation element in the perforation device and / or the perforation device to be adjustable in order to adapt to film webs having different widths.
  • the edge regions are automatically arranged at different absolute positions.
  • the object is achieved by a method for producing a film web, wherein through a device for preventing dust accumulation according to the first aspect of the invention through holes are produced at least at the edge region of the film web.
  • a method according to the invention can be further developed in that a device with at least one adjustable perforation element and / or with an adjustable perforation device is used and that a position of the at least one perforation element and / or the perforation device is adjusted to a width of the film web.
  • a method according to the invention can also be used for different film webs, which have a different width. In such differently wide film webs and the edge regions of the film webs are arranged at different absolute positions.
  • these components of the device can be adjusted adjusted in accordance with the changed absolute position of the edge regions of the new film web. An introduction of through holes in these new edge regions can thus be ensured for the changed film web.
  • a particularly great flexibility, especially one Adjustability to film webs with different widths can thus also be provided in a method according to the invention.
  • the object is achieved by a stretching device for stretching, in particular for longitudinal stretching, of a film web.
  • a stretching device according to the invention is characterized in that the stretching device has a device for preventing dust accumulation according to the first aspect of the invention and / or is designed for carrying out a method according to the second aspect of the invention.
  • FIG. 3 shows a second embodiment of a device according to the invention
  • Fig. 4 shows a third embodiment of a device according to the invention.
  • Fig. 5 shows an embodiment of a method according to the invention.
  • FIG. 1 shows a production process of a film web 40, as may occur according to the prior art. This is a double, laid flat film web 40 in
  • FIG. 2 shows a first embodiment of a device 10 according to the invention.
  • the device 10 according to the invention has a perforation device 20, which in turn has a perforation element 21.
  • the perforation element 21 is designed as a knife and mounted in the perforation device 20 such that it is alternately movable between a first position 30 and a second position 31. This is shown in the left and the right illustration of FIG. 2, in which once the
  • Perforation element 21 is shown in its first position 30 and once in its second position 31. It is clearly visible that in its first position 30 the
  • Perforation element 21 is arranged away from the film web 40. In contrast, in its second position 31 the perforation element 21 penetrates the film web 40,
  • FIG. 3 shows a further embodiment of a device 10 according to the invention.
  • FIG. 3 shows a further embodiment of a device 10 according to the invention.
  • FIG. 3 shows a further embodiment of a device 10 according to the invention.
  • FIG. 3 shows a further embodiment of a device 10 according to the invention.
  • FIG. 3 shows a further embodiment of a device 10 according to the invention.
  • FIG. 3 shows a further embodiment of a device 10 according to the invention.
  • Perforating device 20 in particular a roller 22.
  • a plurality of perforation elements 21 are arranged, one of which is exemplified by a reference numeral.
  • needles may be used as perforation elements 21, for example.
  • the roller 22 is rotatably supported by a bearing device 26, whereby the roller 22 is formed to follow a movement of the film web 40 along a direction of movement 44.
  • the film web 40 is rotationally contacted by the roller 22, so that continuously new perforation 21 penetrate into the film web 40 and penetrate and thereby in an edge region 41 through holes 42 (not shown) in the
  • the perforation device 20 further comprises a tensioning device 27 which presses the roller 22 against the film web 40. Thereby, a clamping force 60 is exerted on the film web 40, whereby a concern of the film web 40 can be ensured at the roller 22 at any time. Removal of the film web 40 from the roller 22, which could interrupt the introduction of through-holes 42 into the film web 40, can be safely avoided in this way.
  • FIGS. 4 a show a further alternative embodiment of a device 10 according to the invention.
  • the perforation device 20 in addition to the roller 22 has a counter-roller 23.
  • the film web 40 moves in a direction of movement 44 and is guided between the counter-roller 23 and the roller 22, so that also in this way a secure contact of the film web 40 at the roller 22 can be ensured.
  • a plurality of perforation elements 21 are arranged, which in turn can be introduced through holes 42 in an edge region 41 of the film web.
  • the roller 22 is rotatably supported again by a bearing device 26, so that the roller 22 can follow a movement of the film web 40 by a rotating contact.
  • FIG. 4 a top view of this embodiment of a device 10 according to the invention is shown. Only the counter-roller 23 is visible.
  • the counter-roller 23 in this case has elements which are designed to receive the perforation elements 21 which are arranged on the roller 22 of the perforation device 20.
  • the roller 22 may have one or more grooves 24 or an elastic region 25. It is provided in particular that this groove 24 and the elastic region 25 are formed for receiving perforation 21. Damage to the
  • Perforation elements 21 through the counter roll 23 can be safely avoided. A particularly high service life and a reduction of maintenance costs in a device 10 according to the invention can be achieved thereby.
  • Fig. 5 shows an application of a method according to the invention on film webs 40 with different widths.
  • the film webs 40 are guided linearly in a direction of movement 44 by a device 10 according to the invention. It is clearly visible that the film webs 40 shown in the two figures of FIG. 5 have a width
  • Perforating devices 20 to adjust according to the changed width of the film web 40. It can thereby be achieved that the perforation 21 of the
  • Perforation devices 20 also bring in film webs 40 with different widths the respective through holes 42 in edge regions 41 of the film webs 40. Due to the adjustability of the perforation 20 can thereby to a complete Replacement of a device 10 according to the invention can be dispensed with. Switching between film webs 40 with different widths during production can be done very quickly in this way. Furthermore, it can be seen in FIG. 5 that the perforation device 20 is equipped with a control unit 28. With help of a
  • Sensor means 28a for example an optical sensor, the edge region 41 of the film web 40 can be detected and monitored. As the location of the edge region 41 changes, alignment of the at least one perforation member 21 is performed by means of the alignment means 28b to further create the through-holes 42 in the manner of the present invention.
  • FIG. 6 shows a stretching device 70 according to the invention for longitudinally stretching a film web 40 which is guided along a transport path in the direction of movement 44.
  • the film web 40 is fed by an extrusion device or an unwinding device.
  • the film web 40 passes an inventive device 10 for preventing dust bubbles 43 (not shown), of which only one roller 22 and a counter-roller 23 are shown here by way of example and without limiting effect. In this way it can be ensured that the film web 40 can be stretched in the stretching device 70 without air trapping between the layers of the film web 40.
  • the film web 40 passes through a guide roller 80, before it in the heating section 71 successively over four heating rollers 81 which are temperature controlled, runs.
  • Each heat roller 81 is associated with a pressure roller 82, which prevents air from being introduced between the film web 40 and a heating roller 81. After the film web 40 has been heated in this way at or above the plasticizing temperature, it is introduced into the stretching section 72.
  • the stretching section 72 comprises transport rollers 83, 84, 85, 86, wherein the roller pairs 83 and 84 and the roller pairs 85 and 86 each have a so-called
  • rollers 84 and 86 each have a larger one
  • the rollers 84 and 85 may have the same peripheral speed.
  • Each of the four transport rollers mentioned is assigned a pressure roller 87, which in each case ensures that the film web 40 firmly rests on the transport rollers 83, 84, 85, 86 and does not slip through. Further pressure rollers 88 in turn prevent the entrainment of air.
  • the film web 40 is guided over the cooling rollers 89, which are again associated with pressure rollers 90 to prevent the Lucaseinschleppung. After the film web 40 has passed two further guide rollers 91 and 92, it can be fed to a winding device or any further processing device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

L'invention concerne un dispositif (10) servant à empêcher la formation de bulles d'air (43) lors de la production d'un double film continu (40) posé à plat, ledit dispositif présentant un dispositif de perforation (20) comprenant au moins un élément de perforation (21), ce dernier (21) étant positionné de sorte que, lors de l'agencement du dispositif de perforation (20) sur le film continu (40), l'élément de perforation (21) pénètre à travers le film continu (40) et forme des trous traversants (42) dans une zone de bordure (41) du film continu (40). L'invention concerne en outre un procédé de production d'un film continu (40) au moyen d'un tel dispositif (10) ainsi qu'un dispositif d'étirage (70) équipé d'un tel dispositif (10) et/ou conçu pour un tel procédé.
PCT/EP2017/051689 2016-01-29 2017-01-26 Perforation d'arêtes de film WO2017129703A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17703673.8A EP3408064A1 (fr) 2016-01-29 2017-01-26 Perforation d'arêtes de film

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CN110757579A (zh) * 2019-11-04 2020-02-07 徐州协盈电子科技有限公司 一种多工位模切机构

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CN110223597B (zh) * 2019-06-24 2021-04-09 浙江索凡胶粘制品有限公司 一种不干胶制作工艺

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US5405561A (en) * 1993-08-31 1995-04-11 Dowbrands L.P. Process for microperforating zippered film useful for manufacturing a reclosable zippered bag
EP0880457A1 (fr) * 1996-02-16 1998-12-02 S.C.JOHNSON & SON, INC. Sac de conservation au congelateur
DE102011085735A1 (de) * 2011-11-03 2013-05-08 Windmöller & Hölscher Kg Reckwerk und Verfahren zum Längen von Folienbahnen

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DE877002C (de) * 1950-11-24 1953-05-18 Rene Augustin Tison Perforationsvorrichtung zum kontinuierlichen und diskontinuierlichen Betrieb
DE10318959B4 (de) * 2003-04-26 2008-04-10 Windmöller & Hölscher Kg Vorrichtung zur Perforation einer durchlaufenden Materialbahn
DE102006030119B4 (de) * 2006-06-28 2015-06-18 Ulrich Büttel Verfahren und Vorrichtung zur Bearbeitung einer Endlosbahn aus flexiblem Material
DE102013012134A1 (de) * 2013-07-19 2015-01-22 Windmöller & Hölscher Kg Vorrichtung zur Herstellung von inline gereckten Folien

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US5405561A (en) * 1993-08-31 1995-04-11 Dowbrands L.P. Process for microperforating zippered film useful for manufacturing a reclosable zippered bag
EP0880457A1 (fr) * 1996-02-16 1998-12-02 S.C.JOHNSON & SON, INC. Sac de conservation au congelateur
DE102011085735A1 (de) * 2011-11-03 2013-05-08 Windmöller & Hölscher Kg Reckwerk und Verfahren zum Längen von Folienbahnen

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Publication number Priority date Publication date Assignee Title
CN110757579A (zh) * 2019-11-04 2020-02-07 徐州协盈电子科技有限公司 一种多工位模切机构

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