JP6409197B2 - Double-sided laminating method - Google Patents

Description

The present invention relates to a double-sided lamination process for coating a film sheet in Table back surface of various printing paper such as posters and DM.

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, conventional lamination system, sheet since it is assumed that the coating film sheets on one side of the printing paper leaflets, is in coating both sides of the table back is necessary to pass the total twice laminate systems each side 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. Then only the film sheet F is cut, printed sheet S in sheet form which has been a continuous state by the film sheet F is separated into separately for each one.

The printing sheet S sheet form which the film sheet F is coated is then moved to a cutting process using most cases cutting machine. While the cutting process is to cut off the print plural sheets S stacked said sheet form in the finished register lines of the printed matter (called cut off cosmetic industry), the reference of the cutting position Ategai back gauge (printing paper that time cutting machine The sheet is cut sequentially by applying two orthogonal sides of the sheet-like printing paper S 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. If the the reference sides film sheet to a description of FIG 2 (C) of the present invention with reference when protruding, back gauge of the cutting machine to the left reference edge of the printing paper S sheet form stacked aligned multiple phase when pressed against the film sheets protruding from the reference edge is caught in the disordered, can not reference edge of the printing paper S for all sheet form is brought into contact with the back gauge, thus ensure accurate contact position can not, printing paper S of the stacked sheet form from being cut by the disparate irregular positions.

By the way, when the coating of the film sheet is considered on both sides of the printing paper, a laminating system for coating the film sheet on both sides of the printing paper as described in Patent 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 method 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 the front and back of the fed sheet-shaped printing paper. A first coating step for coating the film sheet on the surface, and a first film for cutting only the film sheet at the overlapping end portion of the sheet-like printing paper having the film sheet coated on either of the front and back surfaces and the sheet cutting step, the coating of the upper and lower replacement process and the printing paper sheet form obtained by rearranging the upper and lower overlapping ends of the overlap replacing the vertical overlap of the ends of the front and rear of the printing paper sheet form of film sheet is cut a second coating step of coating the remaining surfaces in the film sheets that are not, overlap of the printing paper in the second coating step the single film sheet is covered with foliate A second film sheet cutting step for cutting the film sheet only at the Hare end, be composed of 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 It is characterized by.

  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 weakest part to a tension | pulling , ie, the said notch | incision or the said perforation. The same effect can be obtained even if the cuts and perforations are formed after the film sheet is coated on the printing paper.

As a method of Ru interchanging the upper and lower overlap of the printing sheet edge to the front and rear after cutting the film sheet by varying the position of the conveying speed and the pass line of the printing paper both for back and forth after the first film sheet cutting step Can be replaced. Changing the position of the pass line overlaps the other to the ends of both the print sheet or forcibly lifted or or pulled and cut Ride by the provision deliberately height difference on the surface of the conveying table.

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), showing over time the (B) and (C) state of superimposing Ete swapped up and down during unwinding the overlapping ends of the printing sheets S1 and S2 to the front and rear by the vertical replacement device K of the overlapping end It is a principal part schematic diagram. (A) and (B) is a schematic view showing the main part showing over time how to continue interchanged Ete overlapped with the vertical when feeding the overlapped ends of the printing sheets S1 and S2 in FIG. 5. (A) the printing sheet S1 and S2 to the front and rear through the first coating step, a main-portion schematic view showing a state that is continuously conveyed superposed in a state of E swapped and the upper and lower time feeding the respective ends 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 printing sheets S1 and S2 in the state of (A) being fed out. (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 the up-and-down switching apparatus K of the overlap of an edge part 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 are such that the ends of the preceding and following printing papers S1, S2 are superimposed (the front edge of the subsequent 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.

The starting point of breakage of the film sheet F1 is not limited to fine pores, it may be formed on the end portion of the perforations, for example, by sewing blade. By that time a plurality formed in a band shape by arranging the even or two or more sewing blades a single perforation in parallel, may also be broken is more easily performed.

  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.

Separated printed sheet S as shown in FIG. 2 (C) by the tensile break device B1, in order to cover the remaining upper side, back and forth further in the vertical replacement device K overlap the arranged end to the right The upper and lower overlaps of the end portions of the printing papers S1 and S2 are exchanged and conveyed to the second covering 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 (A) and (B), the printing paper S1, S2 of the front and rear by replacing the previous overlapping sequence the ends of each other, as shown in FIG. 7 (A), the printed sheet S1 The front end portion of the printing paper S2 is superimposed on the lower side of the rear end portion, and is sent to a second covering step further on the right side by a pair of conveying rollers 8a and 8b arranged on the right side. In addition, there is no special restriction | limiting about the means for an end part overlapping order change, You may employ | adopt the other up-and-down changing apparatus K of the overlapping of other known end parts using means other than the above.

  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. While covering the rest of the top side, you need not name that stick to this order. For example on the trailing edge of the printing sheet S1 fed out the superimposed upon the initial feed to the first, the front end of the printing sheet S2 fed out later in the bottom, the upper surface of the printing paper S transported by the first coating step The side may be covered first, and the remaining lower surface side may be covered in the second coating step.

For the steps, the upper and lower replacement device K of the overlapping end is different from the configuration of FIG. 5, the upper and lower replacement device K of the overlapping ends, for example changing the height of the conveyance table as shown in FIG. 8 You may use. In that case, when the preceding printing paper S1 exceeds the height difference as shown in FIG. 8A, the speed with the subsequent printing paper S2 is adjusted as shown in FIGS. A means for superimposing the front end portion of the succeeding printing paper S2 on the rear end portion of the preceding printing paper S1 can be employed. Note that, as described, there is no particular limitation on the means for vertically changing the overlap of the end portions, and other known means for vertically changing the overlap of the end portions may be adopted.

The Figure 1, because that that contains the only strictly essential part, in addition to members described herein, various conveying rollers or the nip roller such or various guide member or the like may be arranged in place.

S, S1, S2 printing paper F1, F2 film sheet a1, a2, a3 end surface V sheet feeding device R1, R2 laminator P1, P2 punching apparatus B1, B2 tensile breaking device vertically interchange device J shaft 1 overlap the K edge Adsorption pads 2a, 2b, 8a, 8b A pair of transport rollers 3a, 3b, 9a, 9b A pair of heat rollers 4a, 10a Drilling rollers 4b, 10b Receiving rollers 5a, 5b, 6a, 6b, 11a, 11b, 12a, 12b A pair of nip rollers 7 Eccentric rollers

Claims (1)

A feeding step of feeding one by one so that the end portion of the printing paper sheet form of longitudinal overlap, a first coating step of coating the film sheet on the front and back either side of the printing paper of the fed-out sheet form, a first film sheet cutting step in which the film sheet on either side of the front and back surfaces to cut the film sheet only at the end of overlap printing paper sheet form coated printing paper of sheet form the film sheet is cut second coating that covers the upper and lower replacement step of overlapping replacing the upper and lower overlapping ends back and forth, the remainder of the surface uncoated printing paper sheet form obtained by rearranging the upper and lower overlapping ends of the film sheet step a, a second fill film sheet in the second coating step is to cut the film sheet only at the end of overlap printing paper sheet form coated And the sheet cutting step, both sides laminated method characterized by comprising the loading process for loading the printing paper cut sheet form for each one with the film sheet is coated on front and back both.

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