JP2016007854A - Double side laminate system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double side laminate system capable of covering film sheets on both the sides of single printing paper by one covering step, and additionally, preventing the protrusion of the film sheets in both the surface and back sides around the standards in such a manner that troubles are not caused to the following cutting step.SOLUTION: Provided is a double side laminate system made of a process composed of: a feeding step of feeding printing paper S; a first covering step of covering the fed printing paper S with a film sheet F1; a first film sheet cutting step of cutting only the film sheet F1 in the overlapped edge part in the printing paper S covered with the film sheet F1; an overlap changing step of changing the overlapping order in the edge part of the printing paper S from which the film sheet F1 has been cut; a second covering step of covering the remaining face not covered in the printing paper S with a film sheet F2; a second film sheet cutting step of cutting only the film sheet F2 in the edge part of the printing paper S covered with the film sheets F1, F2 in both the sides; and a laminating step of laminating each printing paper S.

Description

  The present invention relates to a laminating system for coating a film sheet on the surface of various printing papers such as posters and DMs.

Conventionally, as a method for coating a film sheet on the surface of a sheet-like printing paper, there has been a laminating system described in Patent Document 1, for example.
However, since the conventional laminating system is premised on coating a film sheet on one side of a sheet-like printing paper, it is necessary to pass through the laminating system twice on each side when covering both front and back sides. It was.

  Therefore, for example, as described in FIG. 2 of Patent Document 2, a laminating system in which a film sheet is coated once on both surfaces of a passing printing paper is conceivable.

JP 2007-296623 A JP 2001-106996 A

  In the laminating system described in Patent Document 1, the description will be made along the description and the drawings. As shown in FIG. 3A, the front and rear ends of the continuously fed sheet-like printing paper S overlap each other. To be operated. In this state, the film sheet F is continuously coated as shown in FIG. Thereafter, only the film sheet F is cut, and the sheet-like printing paper S that has been in a continuous state by the film sheet F is cut into individual pieces.

  Then, the sheet-fed printing S coated with the film sheet F moves to a cutting process using a cutting machine in most cases. In the cutting process, a plurality of the above-mentioned sheet-like printing sheets S are cut off at the finished register of the printed matter (called cut off in the industry). At that time, the back gauge of the cutting machine (applying the cutting position to the printing paper) The sheet is cut sequentially by applying two orthogonal sides of the sheet-like printing paper to the plate.

  In other words, in order to prevent misalignment in the cutting operation after printing, it is an important requirement that the film sheet F does not protrude from the two reference sides. The case where the film sheet protrudes from the reference side will be described with reference to FIG. 2C of the present invention. The reference side of the sheet-like printing paper loaded with a plurality of phases aligned is pushed to the back gauge of the cutting machine. When hitting, the film sheet jumping out from the reference side is randomly rolled up, and the reference side of all the sheet-like printing paper cannot contact the back gauge, and therefore, the accurate contact position cannot be secured, and the lamination is performed. The sheet-like printing paper that has been cut is cut at irregular positions.

  By the way, when the film sheet is covered on both sides of the printing paper, a laminating system that covers the film sheet once on both sides of the printing paper as described in the above-mentioned document 2 can be considered. However, although the document 2 has the convenience of covering both sides at once, the film sheet protrudes from both the front and rear sides (at least one side includes a reference side) no matter what cutting means is taken after completion of the double-sided coating. As a result, accurate cutting in the subsequent cutting process cannot be expected.

  In view of the above problems, the present invention allows a film sheet to be coated on both sides of a sheet-like printing paper in a single coating process, and in addition, a film sheet on both the front and back sides of the reference side so as not to hinder the subsequent cutting process. A double-sided laminating system that does not protrude is provided.

  In order to solve the above-mentioned problems, the double-sided laminating system of the present invention includes a feeding step of feeding one sheet at a time so that the ends of the front and back sheet-shaped printing paper overlap each other, and either the front or back of the fed sheet-shaped printing paper. A first coating step of coating the film sheet on the surface of the sheet, a first film sheet cutting that cuts only the film sheet at the overlapping end of the sheet-like printing paper coated with the film sheet on either of the front and back surfaces Any one of the process, the overlap changing step for changing the overlapping order of the front and rear edges of the sheet-like printing paper from which the film sheet has been cut, and the remaining uncoated sheet-like printing paper whose edge overlapping order has been changed In the second coating step of coating the film sheet on the surface of the sheet, at the overlapping end portion of the sheet-like printing paper coated with the film sheet in the second coating step Second film sheet cutting step of cutting Irumushito only, is characterized by comprising a loading step of a film sheet in front and back surfaces both are stacked printing paper sheet form, which is cut into a piece with the cover.

  In the feeding process of the present invention, for example, a known feeding method such as a method of feeding out printing sheets sucked by a suction pad one by one or a method of feeding one sheet at a time by a fiddle roll can be adopted.

  In the first and second coating steps of the present invention, for example, a coating apparatus comprising a pair or a plurality of pairs of heat rollers can be used. Note that the configuration of the coating apparatus may be one in which a pair of rollers is a heat roller and the rest is a configuration of a pressure roller. Further, the surface of the heat roller or the pressure roller may be subjected to fluororesin processing.

  In the first and second cutting steps of cutting only the film sheet of the present invention, for example, the film sheet is cut only with the cutter at the end of the overlapping printing paper, and the discharge-side roller speed is increased between the two pairs of nip rollers. It is possible to preferably employ a method of pulling and breaking, or a method of pulling up and breaking the cut portion by another roller or the like while passing between two pairs of nip rollers, and a method of mixing the same. .

  As a method for promoting the cutting of the film sheet, there is a method of forming a notch such as a perforation at the end of the film in addition to forming the notch directly with a cutter or the like. If it does in this way, a fracture | rupture will be started from the said perforation in the part in which most force acts at the time of pulling. Even if the perforation is formed after the printing paper is coated with a film sheet, the same effect can be obtained.

  As a method of changing the overlapping position of the printing paper edge portions that are moved back and forth after the film sheet is cut, the position is switched by changing the transport speed and the pass line position of both the printing sheets that are moved back and forth after the first film sheet cutting step. be able to. The change of the position of the pass line can be changed by intentionally providing a height difference on the surface of the transport table, in addition to forcibly raising or lowering the end portions of the overlapping printing sheets.

According to the double-sided laminating system of the present invention, both sides can be coated in one step without turning over the printing paper once coated as in the prior art and coating in two steps.
In addition, since the coated film sheets on both sides do not protrude to the side that is the basis of the processing step, cutting misalignment or the like does not occur in a subsequent cutting step or the like.

It is a principal part schematic diagram which shows the flow of the double-sided lamination system of this invention. FIG. 4A is a schematic diagram of a main part showing a state in which front and rear printing papers S1 and S2 are fed out with their end portions overlapped. (B) is a schematic diagram of a main part showing a state in which a film sheet F1 is continuously coated on the lower surface side of the fed printing paper in the state of (A). (C) is a side view of the printing paper S separated for each sheet. (D) is the II sectional view taken on the line in (C). It is a perspective view explaining punching device P1 clearly. (A) And (B) is a principal part schematic diagram which shows a mode that the printing paper S1 and S2 of a continuous state are isolate | separated by the film sheet F1 by the tension breaking apparatus B1. (A), (B), and (C) are main part schematic diagrams showing a state in which the overlapping of the end portions of the printing paper that is moved back and forth by the end portion overlapping order changing device K is overlapped with the order at the time of feeding. . (A) And (B) is the principal part schematic diagram which shows a mode that it overlaps with the edge part overlap of a printing paper changing from the order at the time of feeding following FIG. (A) is a schematic diagram of a main part showing a state in which the printing papers S1 and S2 passing through the first coating process are continuously conveyed with their respective ends overlapped with the order of feeding. It is. (B) is a schematic diagram of a main part showing a state in which a film sheet F2 is continuously coated on the upper surface side of the fed printing paper in the state of (A). (C) is a side view of the printing paper S separated for each sheet. (D) is the II-II sectional view taken on the line in (C). (A), (B) and (C) are the principal part schematic which shows the different aspect of an edge part overlapping order change apparatus with time.

  As shown in FIG. 1, the printing paper S is stacked on a lower left paper stacking table at the top of the system. Then, the sheet is fed out from the uppermost printing sheet S to the conveyance table by the sheet feeding device V including the suction pad 1 or the like. And it is sent out to the laminating apparatus R1 which comprises the 1st coating | covering process which consists of a pair of heat roller 3a, 3b arrange | positioned further on the right side by a pair of conveyance roller 2a, 2b arrange | positioned on the right side. As shown in FIG. 2 (A), the timings while the ends of the preceding and following printing papers S1, S2 are overlapped (the front edge of the succeeding printing paper S2 rides on the rear edge of the preceding printing paper S1). Is taken out.

  As shown in FIG. 2 (A), the printing paper S has a film sheet F1 fed out from a roll waiting below and a pair of heats constituting the laminating apparatus R1 with the front and rear ends overlapped. Alignment is performed by rollers 3a and 3b (which may be a combination of a heat roller and a backup roller), and the lower surface side is continuously covered as shown in FIG.

  Although not shown in the figure, the film sheet F1 has a known heat-sensitive adhesive layer mainly composed of polyethylene or EVA formed on one surface of a base material made of, for example, biaxially stretched polypropylene or polyethylene terephthalate. The surface of the printing paper S is covered with the heat-sensitive adhesive layer that is heated and exhibits adhesiveness by passing between the pair of heat rollers 3a and 3b constituting the laminating apparatus R1 so as not to be peeled off.

  As shown in FIG. 3, for example, as shown in FIG. 3, the film sheet F1 fed from the roll reaches the pair of heat rollers 3a and 3b, and has a receiving roller 4a having a spine-like protrusion and an elastic body such as rubber on the surface. By passing the punching device P1 composed of the roller 4b, a fine through hole is formed on the whole. This through-hole serves as a starting point for separating the printing sheets S1 and S2 which break the film sheet F1 with a tension breaking device B1 which will be described later, and also improves the role of air venting and the transfer of heat during coating. As a result, the adhesiveness is improved and the printed material that has been coated can be torn and broken.

  Note that the fine through-holes for enabling tearing and breaking of the printed material that has been coated are not necessarily formed on the entire surface of the film sheet F1, and are provided in a strip shape on at least one end of the film sheet F1. It does not matter. When rupture starts from any minute hole in the portion, for example, biaxially stretched polypropylene or the like, the rupture propagates all at once, and the film sheet F1 is unbonded at the overlapping portion of the front and back printing sheets S1 and S2. The printing paper S1 and S2 which are cut at the part and separated are separated.

  Further, the breaking of the film sheet F1 is not limited to a fine hole, and for example, a sewing machine may be formed at the end by a sewing machine blade. At this time, even if it is a single sewing machine, it may be possible to make the breakage easier by arranging a plurality of sewing blades in parallel and forming a plurality of strips in a belt shape.

  Then, as shown in FIG. 2 (B), the printing paper S having the lower surface side coated with the film sheet F1 is transferred to the tensile breaking device B1 including two pairs of nip rollers 5a, 5b and 6a, 6b arranged on the right side. Be transported.

  In the tensile breaking device B1, as shown in FIG. 4A, when the overlapping ends of the front and rear printing sheets S1, S2 reach between the two pairs of nip rollers 5a, 5b and 6a, 6b, they pass between the two. Until then, the pair of nip rollers 6a and 6b on the downstream side increases the rotational speed and increases the tension between the nip rollers. Then, a crack occurs in any fine hole located in the unbonded portion Q of the film sheet F1 formed in the overlapping portion of the ends of the printing paper S1 and S2 that have the least resistance to tension. Propagating at a stretch along the overlapping edge step between the two print sheets in the bonded portion, separating the front and rear print sheets S1 and S2.

  The printing paper S separated as shown in FIG. 2C by the tensile breaking device B1 is printed back and forth by the end overlapping order changing device K arranged on the right side in order to cover the remaining upper surface side. The overlapping order of the end portions of the sheets S1 and S2 is changed and conveyed to the second coating step.

  As shown in FIG. 5, the eccentric roller 7 constituting the end overlapping order changing device K rotates while being eccentric about the axis J in synchronization with the traveling direction as the printing paper S1 passes. As shown in FIG. 5A, when the initial printing paper S1 passes, the eccentric roller 7 stops at the position where the protrusion is the least from the conveyance table. When the rear end portion of the passing printing paper S1 approaches, as shown in FIG. 5B, the printing paper S1 starts to rotate eccentrically so as to lift up. When the rear end portion of the printing paper S1 passes, it is lifted most, and at that timing, the front end portion of the subsequent printing paper S2 is fed at a lower speed.

  Then, as shown in FIG. 6, the front and rear printing papers S1 and S2 have their ends replaced with the previous overlapping order, and as shown in FIG. The front end of the printing paper S2 is overlapped and sent to a second coating step that is further refrained to the right by a pair of conveying rollers 8a and 8b arranged on the right. There is no particular limitation on the means for changing the end overlap order, and other known end overlap order changing device K using means other than those described above may be adopted.

  In the second coating step, the film sheet F2 is formed on the upper surface side of the printing paper S as shown in FIG. 7B by the laminating apparatus R2 composed of a pair of heat rollers 9a and 9b as in the first coating step described. Continuously coated. At that time, fine holes are formed on the entire surface of the film sheet F2 by a punching device P2 including a punching roller 10a having spinous protrusions and a receiving roller 10b having an elastic body such as rubber on the surface.

Then, it is separated into the state shown in FIG. 7C by the second tensile breaking device B2 and sequentially loaded on the right stocker and used for the subsequent cutting step.
In the downstream cutting step, as shown in FIG. 7C, the end face a1 where the broken film sheets F1 and F2 of the paper S do not protrude and the end face where the film sheet shown in FIG. Since either a2 or a3 can be used as a cutting criterion, no problem occurs.

  In this embodiment, the film sheet F1 is fed out from below in the first coating step, and the lower surface side of the conveyed printing paper S is covered first, and the film sheet F2 is fed out from above in the second coating step. The remaining upper surface side is covered. However, it is not necessary to stick to this order. For example, in the initial feeding, the first printing paper S1 is fed first, the rear edge of the printing paper S1 fed first is up, and the front edge of the printing paper S2 fed later is down. The upper surface side of the printing paper S conveyed in the coating step may be covered first, and the remaining lower surface side may be covered in the second coating step.

  In the case of the above process, the end overlap order changing device K differs from the configuration of FIG. 5, for example, as shown in FIG. 8, changing the height of the transport table at the position of the end overlap order changing device K By adjusting the speeds of the print sheets S1 and S2, it is possible to employ means for superimposing the front end portion of the succeeding print sheet S2 on the rear end portion of the preceding print sheet S1. As described, there is no particular limitation on the means for changing the end overlapping order, and other known end overlapping order changing means may be adopted.

  In FIG. 1, only the main part is described, and in addition to the members described here, various conveyance rollers, nip rollers, various guide members, and the like may be arranged at appropriate positions.

S, S1, S2 Printing paper F1, F2 Film sheet a1, a2, a3 End face V Paper feeding device R1, R2 Laminating device P1, P2 Punching device B1, B2 Tensile breaking device K End overlapping order changing device J Axis 1 Suction pad 2a, 2b, 8a, 8b A pair of conveying rollers 3a, 3b, 9a, 9b A pair of heat rollers 4a, 10a Aperture rollers 4b, 10b A receiving roller 5a, 5b, 6a, 6b, 11a, 11b, 12a, 12b Nip roller 7 Eccentric roller

Claims (1)

  A feeding step for feeding out the sheets one by one so that the ends of the front and back sheet-like printing paper overlap each other, a first coating step for coating a film sheet on either the front or back side of the fed sheet-like printing paper, front and back sides A first film sheet cutting step of cutting only the film sheet at the overlapping end portion of the sheet-like printing paper coated with the film sheet on any one of the front and back sides of the sheet-like printing paper from which the film sheet has been cut An overlap changing step for changing the overlapping order of the end portions, a second covering step for covering the remaining uncoated surface of the sheet-like printing paper whose end overlapping order is changed, and a second covering step A second film sheet cutting step for cutting only the film sheet at the overlapping end of the sheet-like printing paper coated with the film sheet in the coating step of Sided laminate system characterized by comprising a loading step for loading the printing paper cut sheet form for each one with a surface both the film sheet is coated.

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