JP4623632B2 - Cylindrical film manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a cylindrical film, and it is possible to improve the folding accuracy when manufacturing a heat-shrinkable label, which has been subjected to printing that is heat-shrinked to a container such as a PET bottle, from a film to a cylinder, It is intended to prevent scratches and whitening of the overlapped portion.

  Conventionally, containers such as plastic bottles filled with soft drinks have been printed on the inner surface of a long heat-shrinkable film. It is generally performed to make a tubular film that is bonded to form a tubular film, and to heat-shrink and attach a heat-shrinkable label (shrink label) cut from the film.

As an apparatus for producing a cylindrical film from such a long film, for example, in the folding bonding apparatus 1 disclosed in Patent Document 1 shown in FIG. 3, the long film 3 is guided as the transport mechanism 2. A pair of upper and lower guide rollers 2a and a pair of upper and lower nip rollers 2b that convey the bonded cylindrical film 3 while being pulled are provided and conveyed, and a work plate 4 is disposed in the middle of these conveyance mechanisms 2a and 2b. A long film 3 is wound from the lower side, and two pairs of rollers 5a and 5b that are inclined in a pair of left and right conveying directions constituting the folding mechanism 5 are provided so as to be brought into contact with the film surface and draw both edges. Then, an adhesive is applied to the folded overlapped portion 3a by the nozzle 6 and then pressed by the pressing plate 7 to be bonded.
Various similar tubular film manufacturing apparatuses have been proposed, such as Patent Documents 2 and 3.
Japanese Utility Model Publication No. 58-121802 JP-A-8-2512 JP-A-8-337219

  In such a cylindrical film manufacturing apparatus, the long film 3 is supplied to the lower side of the work plate 4 and the rollers 5a and 5b inclined with respect to the transport direction are brought into contact with each other so as to draw both edges. Since the inner surface of the film 3 and the work plate 4 rub against each other because they are folded into a cylindrical shape, the inner surface of the film 3 is easily damaged. Usually, printing is performed on the inner surface of the film, so that the printed surface is damaged. is there.

  In addition, since both edges of the film 3 need to be overlapped to form a cylinder, the rollers 5a and 5b inclined with respect to the transport direction are brought into contact with each other, so that the film 3 rolls in a direction crossing the transport direction of the film 3. There is also a problem that rubbing marks enter the outer surface of the film 3 by these moving rollers 5a and 5b.

  Furthermore, when laminating the overlapping portion 3a overlaid on the cylindrical film 3, if a solvent for adhesion is applied to one of the overlapping portions 3a, the surface of the film can be unevenly compressed by a solvent attack. If the layers are bonded together, innumerable bubbles may be sandwiched in this portion to cause whitening, and there is a problem that the range of usable solvents becomes narrow.

  The present invention has been made in view of the above-described problems of the prior art, and is intended to provide an apparatus for manufacturing a cylindrical film that does not cause scratches on the inner surface and outer surface of the film and can prevent air bubbles from being caught in the overlapped portion. To do.

In order to solve the above-described problems of the prior art, the tubular film manufacturing apparatus according to claim 1 of the present invention is folded so that both edges of the long film overlap, and the overlapping portions are bonded together to form the tubular film. An apparatus for manufacturing a pair of folding rollers composed of a horizontal roller that is applied to the inner surface of a long film to regulate the folding width, and a pair of the folding rollers provided on both sides in the width direction downstream of the folding roller in the feed direction. V-grooves are provided to press the upper and lower sides of the folded-back portions on both edges of the film-like film so that both sides of the film in the width direction are pressed to maintain the folded shape and the folded width, and a bonding agent is applied to the overlapping portion. a coating nozzle, up narrow width corresponding to the overlapping portion of the bonded material is provided adjacent to the downstream side in the transport direction of the coating nozzle is pressed from above the overlapped portions coated A laminating roller and a laminating roller composed of a roller that opposes the pre-lamination roller and presses the cylindrical film from below, and the elongate film is connected to the folding roller. The insertion angle is set to 5 to 80 degrees with respect to the horizontal plane, the sheet is conveyed with the horizontal roller of the folding roller being applied to the inner surface thereof, and both edges are folded back, and the folded width. The folded portion on both sides in the direction is conveyed by maintaining the folded shape and the folded width by sandwiching the folded portion and the folded width from the outside with no member in contact with the inner surface of the tubular film. was applied, is characterized in that the bonded by the bonding rollers paste the overlapped portion is configured to form a tubular film having a predetermined flat width

According to this tubular film manufacturing apparatus, by applying a folding roller composed of a horizontal roller to the inner surface of a long film and regulating the folding width, scratches such as in the case of a fixed work plate are generated. V-groove rollers are provided on both downstream sides in the feed direction of the folding roller to hold the folded edges of the long film on both sides of the folded edge of the elongated film from both sides. By maintaining the width, the tubular film can be manufactured while preventing the occurrence of scratches as in the case of using a roller that intersects the conveying direction in contact with the film surface.
Further, immediately after application of the bonding agent, the solvent is pressed by a pre-bonding roller and a bonding roller composed of a roller that presses the cylindrical film from below to bond the pre-bonding roller. In addition to preventing the occurrence of attack and eliminating air bubbles and preventing whitening, the pre-bonding roller has a minimum required width, making it easier to apply pressing force and more reliably. It becomes possible to prevent whitening by preventing the inclusion of bubbles.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the cylindrical film manufacturing apparatus includes a vertical roller that presses the flutter of the film on the outer side of the long film of the folding roller . A guide roller is provided.

According to this tubular film manufacturing apparatus, a guide roller composed of a vertical roller that presses the flutter of the film is provided on the outer side of the long film of the folding roller. The flutter when folded is pressed by a guide roller constituted by a vertical roller so that it can be smoothly folded.

  Furthermore, in addition to the structure of Claim 1 or 2, the manufacturing apparatus of the cylindrical film of Claim 3 of this invention comprised the said V-groove roller in multiple pairs, It is characterized by the above-mentioned.

  According to this cylindrical film manufacturing apparatus, a plurality of pairs of V-groove rollers are provided, and a predetermined folding width can be more easily maintained until they are bonded.

  Moreover, in addition to the structure in any one of Claims 1-3, the manufacturing apparatus of the cylindrical film of Claim 4 of this invention is the both sides of the feed direction of the said V-groove roller on the both sides downstream of the both-ends folding | returning part. This is characterized in that a folding roller for pressing the is provided.

  According to this tubular film manufacturing apparatus, folding rollers are provided on both sides of the V-groove roller downstream in the feed direction so as to press the front and back of both edge folding portions. The folding width can be reliably maintained constant.

Furthermore, in addition to the structure in any one of Claims 1-4, the manufacturing apparatus of the cylindrical film of Claim 5 of this invention WHEREIN: The said roller which presses from the bottom which comprises the said bonding roller is said folding. It is characterized in that it is also used as a reed roller .

According to this cylindrical film manufacturing apparatus, the roller that presses from below constituting the laminating roller is configured to serve also as the folding roller, and the laminating roller immediately after application of the laminating agent By pressing the roller that presses from below that also serves as an eclectic roller, it is possible to more reliably prevent the occurrence of solvent attack, eliminate the presence of bubbles, prevent whitening , and provide eclectic I can do it.

Moreover, in addition to the structure in any one of Claims 1-5, as for the manufacturing apparatus of the cylindrical film of Claim 6 of this invention, the said cylindrical film is printed on the inner surface at least. It is characterized by.

Moreover, according to this cylindrical film manufacturing apparatus, the cylindrical film can be manufactured without causing scratches or the like on the printed surface even if the cylindrical film is printed on at least the inner surface thereof. It becomes like this.

According to the tubular film manufacturing apparatus of the first aspect of the present invention, the tubular film is manufactured by folding the both ends of the long film so as to overlap each other and bonding the overlapping portions. a folding roller composed of horizontal rollers devoted to the inner surface of the film to regulate the wrap width, the upper and lower edges folded portion of the elongated film provided in a pair on both sides in the width direction of the feeding direction downstream of the folding rollers A V-groove roller that is provided with pressing V-grooves and holds both sides in the width direction of the film to maintain the folded shape and the folded width, a coating nozzle that applies a bonding agent to the overlapping portion, and a feeding direction of the coating nozzle A narrow pre-bonding roller corresponding to the overlapping portion that is provided adjacent to the downstream side and presses the overlapping portion coated with the bonding agent from above, and this pre-bonding A laminating roller composed of a roller that opposes the laminating roller and presses and bonds the cylindrical film from below , and the long film has an insertion angle of 5 to the horizontal plane with respect to the horizontal roller. It is conveyed at a setting of -80 degrees, the horizontal roller of the folding roller is applied to the inner surface of the roller and its both edges are folded in a state where the folding width is restricted, and the folded portions on both sides of the folded width direction are cylindrical. With no member in contact with the inner surface of the film, the film is sandwiched from outside by a V-groove roller and conveyed while maintaining the folded shape and folded width, and the application nozzle is used to apply a bonding agent to the overlapping portion. since bonded by bonding rollers and configured to form a tubular film with a predetermined folding diameter, folding rollers constituted by horizontal rollers on the inner surface of the elongate film By restricting the folding width, it is possible to prevent the occurrence of scratches as in the case of a fixed work plate. V-groove rollers are provided on both downstream sides in the feed direction of the folding roller to provide a long film. As in the case of using a roller that intersects the conveying direction that contacts on the film surface by pressing the upper and lower sides of the folded edge of the long film from both sides and maintaining the folded shape and folded width from both sides. Generation of scratches can be prevented, and a cylindrical film can be produced with high accuracy.
Further, immediately after application of the bonding agent, the solvent is pressed by a pre-bonding roller and a bonding roller composed of a roller that presses the cylindrical film from below to bond the pre-bonding roller. By preventing the occurrence of attack and eliminating the presence of air bubbles, it is possible to prevent whitening, and by making the pre-bonding roller a roller with the minimum required width, it is easy to apply a pressing force, and more reliably It is possible to prevent whitening by preventing the inclusion of bubbles.

Further, according to the cylindrical film manufacturing apparatus of the second aspect of the present invention, since the guide roller configured by the vertical roller that presses the flutter of the film is provided on the outer side of the long film of the folding roller, The flutter when the film is folded back from the flat shape can be smoothly folded back by pressing with a guide roller constituted by a vertical roller .

  Furthermore, according to the tubular film manufacturing apparatus according to claim 3 of the present invention, since a plurality of pairs of V-groove rollers are provided, the predetermined folding width can be more easily maintained until the rollers are bonded. it can.

  According to the tubular film manufacturing apparatus of the fourth aspect of the present invention, the folding rollers for pressing the front and back of both edge folded portions are provided on both downstream sides in the feed direction of the V-groove roller. By pressing with the folding roller, the folding width can be more reliably maintained constant.

Further, according to the tubular film manufacturing apparatus of the fifth aspect of the present invention, the roller that presses from below constituting the laminating roller is also configured to serve as the folding roller. Immediately after applying the adhesive, the roller that presses from the bottom of the laminating roller is also used as an eclectic roller to prevent the occurrence of solvent attack and eliminate the presence of bubbles and prevent whitening. It can be done, and it is possible to make a compromise.

According to the tubular film manufacturing apparatus of the sixth aspect of the present invention, the tubular film generates scratches or the like on the printed surface even if the tubular film is printed on at least the inner surface. A cylindrical film can be produced without any problem.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
1 and 2 relate to one embodiment of the tubular film manufacturing apparatus of the present invention, FIG. 1 is a schematic perspective view of the whole, and FIG. 2 is a V-groove roller portion, a signature roller portion and a pre-bonding roller. It is sectional drawing of a part.

  The cylindrical film manufacturing apparatus 10 is an apparatus for manufacturing a heat-shrinkable label, which is printed by being heat-shrinked into a container such as a PET bottle, from a flat film to a cylindrical film. The flat long film is printed on the inner surface in advance.

  In this cylindrical film manufacturing apparatus 10, a nip roller 13 is used as an upstream conveyance roller (not shown) that conveys the long film 11 and a downstream conveyance roller that conveys the tubular film 12 after being bonded by pulling. After the roll-shaped film 11 is sequentially fed out, it is folded back so that both edge portions 11a and 11b are overlapped, and the overlapping portion 11c is bonded and fed out as a tubular film 12, and is wound up by a winding device (not shown). It is like that.

  In order to fold the long film 11 conveyed in this way into a cylindrical film 12, a folding roller 14 for regulating the folding width is provided on the upstream side and is composed of a horizontal roller, and the roll length is the film. 11 is set in correspondence with the folding width B of 11 and is brought into contact with the inner surface of the film 11 to regulate the folding diameter D of the tubular film 12. In addition, the elongate film 11 conveyed is set so that the insertion angle to the folding | turning roller 14 may be 5 to 80 degree | times with respect to a horizontal surface, Preferably it is 40 to 60 degree | times.

  A pair of guide rollers 15 are provided on both sides of the folding roller 14 to guide the edges 11a and 11b of the folded film 11 so as not to flutter. Is conveyed while the film 11 is in contact therewith.

  Further, as shown in FIG. 2A, a V-groove roller 16 provided with V-grooves for pressing up and down of the folded-back portion 11d is disposed on the downstream side of the folding roller 14. A pair of 16 is arranged on both sides in the width direction of the film 11 and the film 11 is sandwiched from both sides so that the folded width B of the film 11 (folding diameter D of the tubular film 12) is maintained.

  Three pairs of such V-groove rollers 16 are provided in the conveying direction so that the folded shape of the film 11 and the folded width B (folded diameter D of the tubular film 12) can be maintained.

  Further, in this tubular film manufacturing apparatus 10, a folding roller 17 constituted by a pair of upper and lower horizontal rolls is provided downstream of the most upstream V-groove roller 16, as shown in FIG. The roll gap is adjusted so that the folded state can be maintained without folding until the film 11 is completely folded.

A folding roller 17 is also provided on the downstream side of the most downstream V-groove roller 16.
These folding rollers 17 are configured as short rollers divided in the width direction of the film 11 as shown in FIG. 2 (b), for example, or as shown in FIG. 2 (c). A split roller is used, and the lower side is constituted by one long continuous roller.

  In addition to the illustrated example, the folding roller 17 may be constituted by a continuous roller that is long in both the upper and lower sides, and may be any as long as it can fold the film 11.

  A coating nozzle 18 for applying a laminating agent is provided between the most downstream V-groove roller 16 and the downstream folding roller 17. Here, the inner surface of the upper edge portion 11 a of the overlapping portion 11 c of the film 11 is provided. An adhesive solvent is applied to the substrate.

  In addition, as a bonding agent, an adhesive may be used in addition to the solvent of the film 11 as long as the overlapping portion 11c can be bonded to form a cylinder.

  A pre-nip roller 19 as a pre-bonding roller for bonding is provided immediately downstream of the coating nozzle 18 and is disposed between the upper rollers of the downstream folding roller 17 and the lower folding roller 17. Is used also as a lower roller of the pre-nip roller 19 as a pre-bonding roller so that the overlapping portion 11c of the film 11 can be pressed and bonded.

  The pre-nip roller 19 as the pre-bonding roller presses the overlapping portion 11c of the film 11 immediately after the bonding agent is applied, thereby preventing the occurrence of unevenness due to the solvent attack of the film 11 by the adhesive solvent. It also prevents white air bubbles from getting caught.

  Further, the entire width direction of the tubular film 12 is pressed by the nip roller 13 positioned on the downstream side of the pre-nip roller 19 as the pre-bonding roller, and the tubular film 12 is conveyed so as to be pulled out.

  In the cylindrical film manufacturing apparatus 10 configured as described above, the cylindrical film 12 is manufactured from the long film 11 as follows.

  When the roll-shaped long film 11 is conveyed by an upstream conveyance roller and a downstream nip roller 13 (not shown) and sent to the lower side of the folding roller 14, both edges 11 a of the film 11 have the width of the folding roller 14. , 11b are folded back and guided by the guide rollers 15 on both sides thereof to prevent fluttering, and the folding is started.

  Then, the folded width B is maintained by the three pairs of the V-groove roller 16 and the folding roller 17 while the folded film 11 is being conveyed, and the folded portion 11d is pressed and reliably folded. An adhesive solvent is applied to one of the overlapping portions 11c by the application nozzle 18 for the bonding agent.

  Then, the overlapping portion 11c is pressed and bonded by a pre-nip roller 19 as a pre-bonding roller provided immediately after the coating nozzle 18, and the cylindrical film 12 is formed.

  Then, the tubular film 12 is pressed over the entire width by the nip roller 13 further downstream, sent out, and wound up to complete the tubular film 12.

  According to such a tubular film manufacturing apparatus 10, the folding width 14 is regulated by applying the rotating folding roller 14 to the inner surface of the long film 11, so that the scratches as in the case of a fixed work plate are obtained. Can be prevented.

  Further, V groove rollers 16 are provided on both downstream sides in the feed direction of the folding roller 14 to press both edge folded portions 11d of the long film 11 from both sides and maintain the folded width B. It is possible to prevent the occurrence of scratches as in the case of using a roller that intersects the conveying direction in contact with the above, and it is possible to manufacture a cylindrical film with high accuracy.

  Further, since the guide roller 15 for pressing the fluttering of the film 11 is provided outside the folding roller 14, the film 11 can be smoothly folded back by pressing the fluttering when the edges 11a and 11b are folded back from the flat shape. .

  Further, according to the tubular film manufacturing apparatus 10, the folding rollers 17 that press the front and back of the both-side folded portions 11d are provided on both downstream sides in the feed direction of the V-groove roller 16, so that the folding width can be more reliably achieved. B (folding diameter D of the tubular film 12) can be kept constant.

  Further, since a pre-nip roller 19 as a pre-bonding roller is provided adjacent to the downstream side in the feed direction of the coating nozzle 18, it is possible to prevent the occurrence of a solvent attack or the like by pressing immediately after the bonding agent is applied. Air bubbles can be eliminated and whitening caused by this can be prevented.

  In addition, since the pre-nip roller 19 as the pre-bonding roller is configured with a narrow width roller corresponding to the overlapping portion 11c, it is easy to apply a pressing force by setting the minimum necessary roller width, It is possible to prevent whitening by more reliably preventing the presence of bubbles.

Next, about the Example of the cylindrical film 12 manufactured with the manufacturing apparatus 10 of the cylindrical film of this invention, the measurement result of the folding diameter D is demonstrated with a comparative example.
In this example, 2.0 L (liter) of a tubular film for PET bottles (target folding diameter: 174.3 mm) was manufactured by changing the conveying speed (100, 200 m / min), and each folding diameter D ( mm).

  Moreover, the film used (material: OPS, thickness: 60 micrometers) was made into three types of I, II made from A company, and I made from B company.

  As a cylindrical film manufacturing apparatus, three pairs of V-groove rollers and two pairs of folding rollers were installed.

  Moreover, the apparatus provided with the conventional working plate and 2 sets of inclination rollers was used as a comparative example.

  The measurement results of Examples and Comparative Examples are as shown in Table 1. In any case, the folding diameter D of the example has a smaller error from the target folding diameter and can be manufactured with high accuracy. Was confirmed.

In addition, the tubular films obtained in the examples did not show any scratches on the inner surface side or scratches on the outer surface side, and there was no whitening of the bonded portion.

1 is an overall schematic perspective view according to an embodiment of a tubular film manufacturing apparatus of the present invention. It is sectional drawing of the V groove roller part concerning one embodiment of the manufacturing apparatus of the cylindrical film of this invention, a signature roller part, and a pre-bonding roller part. It is a schematic plan view of the conventional cylindrical film manufacturing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cylindrical film manufacturing apparatus 11 Long film 11a Edge part 11b Edge part 11c Overlapping part 11d Folding part 12 Cylindrical film 13 Nip roller 14 Folding roller 15 Guide roller 16 V groove roller 17 Folding roller 18 Coating nozzle 19 Pre Nip roller (pre-bonding roller)
B Folding width of the film D Folding diameter of the tubular film

Claims (6)

It is an apparatus for producing a tubular film by folding back both ends of a long film so as to overlap each other and bonding the overlapping parts,
A folding roller composed of a horizontal roller that is applied to the inner surface of the long film and regulates the folding width;
The folding rollers V grooves for pressing the upper and lower edges folded portion of the elongated film provided in a pair on both sides in the width direction of the feeding direction downstream provided for pressing the both sides in the width direction of the film, respectively, folded shape and wrap width A V-groove roller for maintaining
An application nozzle for applying a bonding agent to the overlapping portion;
A narrow pre-bonding roller corresponding to the overlapping portion provided on the downstream side in the feeding direction of the coating nozzle and pressing the overlapping portion coated with the bonding agent from above, and the pre-bonding roller A laminating roller composed of a roller facing and laminating the cylindrical film from below ,
The long film is conveyed with the insertion angle to the folding roller set to 5 to 80 degrees with respect to a horizontal plane, and the folding width is regulated by applying the horizontal roller of the folding roller to the inner surface thereof. Both edges are folded, and the folded portions on both sides of the folded width direction are sandwiched by V-groove rollers from the outside with no member contacting the inner surface of the tubular film, and the folded shape and the folded width are maintained and conveyed. A cylindrical film characterized in that a laminating agent is applied to the overlapping portion by the coating nozzle, and the overlapping portion is bonded by a bonding roller to form a cylindrical film having a predetermined folding diameter. Manufacturing equipment. 2. The cylindrical film manufacturing apparatus according to claim 1, wherein a guide roller constituted by a vertical roller that presses the flutter of the film is provided on an outer side of the long film between the folding rollers.   3. The tubular film manufacturing apparatus according to claim 1, wherein a plurality of pairs of the V-groove rollers are provided.   The apparatus for producing a cylindrical film according to any one of claims 1 to 3, wherein a folding roller for pressing the front and back of both edge folded portions is provided on both sides downstream of the V-groove roller in the feeding direction. The cylindrical film manufacturing apparatus according to any one of claims 1 to 4, wherein the roller that presses from below constituting the laminating roller is also used as the folding roller . The tubular film manufacturing apparatus according to claim 1, wherein at least an inner surface of the tubular film is printed .

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