WO1997043129A1

WO1997043129A1 - Method of sticking press plate and support together and sticking device

Info

Publication number: WO1997043129A1
Application number: PCT/JP1997/001613
Authority: WO
Inventors: Hidefumi Arai; Kazuyuki Haraguchi
Original assignee: Mitsubishi Paper Mills Limited
Priority date: 1996-05-14
Filing date: 1997-05-14
Publication date: 1997-11-20
Also published as: DE19780477T1

Abstract

A method of processing a press plate in order to perform mounting of a paper plate or a resin plate in a similar manner to a PS plate, and more specifically, a method of sticking a paper plate or a resin plate to a support and a sticking apparatus. Concretely, provided are: (1) a method of sticking a press plate and a support together before the press plate is mounted to a printing machine, in which method the press plate and the support are stuck together while shaped into a cylindrical configuration or an arcuate configuration, and (2) an apparatus for sticking a press plate and a support together, said apparatus comprising a rotatable drum having means for positioning the support, means for fixing a head end of the support, means for positioning the press plate and means for fixing a head end of the press plate, and a pressing roller which acts to bias the press plate and the support against the drum.

Description

Method and apparatus for bonding a printing plate and a support

The present invention uses a lithographic printing plate based on paper or plastic resin (hereinafter referred to as a paper plate and a resin plate) in the same manner as a PS plate based on an aluminum plate (a pre-sensitized plate using a photosensitive resin). The present invention relates to a method for bonding a printing plate to a support such as an aluminum plate in advance so that the printing plate can be mounted on a printing press, and a bonding device. Background art

As printing plates, there are PS plates using an aluminum plate as the base, paper plates using paper, and resin plates using plastic resin such as polyester film, which are used according to the purpose of printing. .

The PS plate can print nearly 10 times the number of prints compared to the paper plate or resin plate, but it is expensive. Plates are widely used.

Paper plates and resin plates have lower stiffness and strength than PS plates, and when mounted directly on plate cylinders like PS plates, wrinkles or distortions are likely to occur when adjusting the position of plate cylinders, which is a problem in operability. There is. Therefore, it cannot be applied to color printing or the like that requires registration. In order to solve this problem, a method is generally adopted in which a support having high strength and rigidity, such as an aluminum plate, is mounted on the plate cylinder of a printing press in advance, and a printing plate such as a paper plate is placed on the support. .

The above-mentioned printing method is disclosed in, for example, Japanese Utility Model Laid-Open No. 11-175819, Japanese Patent Laid-Open No. Hei 6-34946, and Japanese Patent Laid-Open No. Hei 8-37979. According to this method, a support such as an aluminum plate is fixed in advance by a clamp of a printing press, and then mounted on a plate cylinder, and then a printing plate is mounted on the support. Newly installed on the upper blade surface of the clamp It is fixed with the positioning pin and the holding plate.

The above method requires the processing of clamps (hiding the positioning pins and the holding plate) to perform the method, resulting in a considerable cost. In addition, printing with an automatic plate hanging device, which is a trend in recent years, is required. There is a problem that it cannot be applied to presses, and a problem that it cannot be applied to offset rotary presses.

On the other hand, before mounting a printing plate such as a paper plate on a printing press, it is possible to bond the printing plate to a metal plate (support) such as an aluminum plate in advance. This is disclosed in the official gazette. Since this method is the object of the present invention and can be applied to the ordinary PS plate mounting method, there is an advantage that the method can be applied to an automatic plate mounting apparatus without requiring the above-described clamp processing.

The above-mentioned work of laminating the support and the printing plate was generally performed on a flat surface where the lamination can be performed most easily.

Conventionally, typical offset printing plates of paper and resin plates include electrostatic fax masters and camera-exposed silver halide printing plates (for example, a silver master manufactured by Mitsubishi Paper Mills, a super master manufactured by Agfa, etc.). ) Is the mainstream, and was generally used for monochrome printing. In the case of single-color printing, there was no particular problem with the two-dimensional bonding described above.

However, in recent years, CTP (computer 'two' plate) systems have attracted attention, and silver halide printing plates for scanning exposure (for laser exposure) (for example, silver digiplate manufactured by Mitsubishi Paper Mills, Ltd.) Color printing (multi-color printing) using Agfa's set print etc. is now possible.

However, it was found that if the printing plate was attached to the plate cylinder of the printing press after the support and the printing plate were bonded on a flat surface, it could not be applied to color printing. In other words, when they are laminated on a flat surface, when mounted on a plate cylinder, there is a subtle difference between the inner diameter (support side) and the outer diameter (plate side) depending on the thickness of the support. It was found that it caused considerable elongation and strain. This printing plate elongation and distortion can be achieved by color printing, which requires a high degree of accuracy. Was a serious problem.

Also, with the conventional method of laminating a support and a printing plate, it is difficult to accurately align the support and the printing plate during lamination, and a laminating device that can accurately perform the positioning is desired. Was.

Accordingly, an object of the present invention is to plate a printing plate such as a paper plate or a resin plate in the same manner as a PS plate, and substantially no elongation or distortion of the printing plate occurs when the plate is mounted. (A degree that does not affect color printing) An object of the present invention is to provide a method and an apparatus for laminating a support and a printing plate.

Another object is to provide a method and an apparatus for laminating a support and a printing plate which can be applied to an automatic plate hanging apparatus.

Still another object is to provide a laminating device having a high lamination position accuracy between a support and a printing plate.

Still another object is to provide a method and an apparatus for attaching a support for adjusting the thickness to a thin paper plate or a resin plate. Disclosure of the invention

The above object of the present invention has been basically achieved by the following method and apparatus.

(1) A method of bonding a support and a printing plate before mounting the printing plate on a printing press, characterized in that the support and the printing plate are bonded in a cylindrical or arcuate shape. .

(2) Before mounting the printing plate on the printing press, in the method of bonding the support and the printing plate, it is necessary to make one of the support and the printing plate into a cylindrical shape or an arc shape and then bond the other. Characteristic lamination method.

(3) The bonding method according to any one of (1) and (2), wherein a non-adhesive portion is provided in a direction orthogonal to a bending direction in a cylindrical shape or an arc shape.

(4) An adhesive or a pressure-sensitive adhesive using the bonding method of (1) or (2) above. A method of applying pressure through a laminator, characterized in that the pressure is not applied partially in the direction perpendicular to the bending direction of the cylinder or arc, or the pressure is reduced and the bonding is performed. How to attach.

(5) A drum having means for positioning the support, means for fixing the head end of the support, means for determining the position of the printing plate, and means for fixing the head end of the printing plate; and An apparatus for laminating a support and a printing plate, comprising a press roller that acts to press and press.

(6) In the laminating apparatus according to (5), the pressing force of the pressing roller against the drum is partially released substantially in a direction perpendicular to the rotation direction of the drum. An apparatus for laminating a support and a printing plate.

In the present invention, paper and resin plates can be handled in the same way as PS plates, and can be adapted to color printing by studying the method of attaching paper and resin plates to a support such as an aluminum plate. I made it. As a result of further research, it has become possible to adapt to an automatic plate hanging device. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1a is a plan view of the bonding apparatus of the present invention,

FIG. 1 b is a front view of the bonding apparatus of the present invention,

FIG. 1 c is a side view of the bonding apparatus of the present invention,

Figure 2 is a perspective view of the drum,

Fig. 3a is a side view when a support is mounted on the bonding apparatus of the present invention. Fig. 3b is a side view when a plate is mounted on the bonding apparatus of the present invention. Figure c is a side view when the support and the printing plate are bonded by the bonding device of the present invention,

FIGS. 4 a and b are explanatory views of a cylindrical shape and a cross-sectional arc shape of the present invention,

Fig. 5 is an explanatory diagram of plate elongation when pasted on a flat surface,

FIG. 6 is an explanatory view of a mask for creating an uncoated portion of the adhesive, FIGS. 7a and 7b are diagrams illustrating the operation of the uncoated portion of the adhesive for returning to the flat state,

FIG. 8 is a perspective view after lamination using the method of the present invention,

Figure 9 is a perspective view of the pin bar,

FIG. 10 is an enlarged side view showing a relationship between a drum and a pressing roller of the bonding apparatus of the present invention,

FIG. 11 is a diagram showing a change state of the presser pressure to the drum,

Each code represents 1: drum, 2: press roller, 3: positioning pin, 11: support, 12: printing plate, 21: pressing pressure release spacer. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail.

In the present invention, the printing plate that needs to be bonded to the support is a planographic printing plate using paper or a composite material of paper and plastic resin or a plastic resin as a base. Specifically, a lithographic printing plate based on a laminated paper, a polyester film, or the like, in which both surfaces of a paper are coated with a polyolefin resin, may be mentioned. More specifically, it is a silver salt printing plate using the above base.

As the support, a metal plate such as an aluminum plate or a high-strength resin plate is used, but an aluminum plate is preferable, and a used PS plate can also be used. The thickness of the support is appropriately selected depending on the thickness of the printing plate, but is generally about 0.1 to 0.2 mm.

According to the present invention, in addition to a method of simultaneously forming a support and a printing plate into a circular shape or an arc shape and bonding them together, one of them (for example, a support) is previously formed into a cylindrical shape or an arc shape. The other (printing plate) may be bonded. From the viewpoint of workability, the former method is preferable in which the support and the printing plate are simultaneously bonded in a circular or arc shape. An adhesive or a pressure-sensitive adhesive (hereinafter, referred to as a pressure-sensitive adhesive) is used for bonding the support and the printing plate. The conventional method of pasting on a flat surface could not be applied due to misregistration in force printing that performs four-color printing as described above, but the inventor analyzed the reason for this as follows. are doing. That is, assuming that the thickness of the support 11 is a as shown in FIG. 5, when the support 11 is attached to a plate cylinder (assumed to be circular) after laminating on a plane, the circumference of the support 11 is Is 27tR, the circumference of the printing plate 12 is 2π (R + a), and the printing plate length is short of 2πa. Become. This elongation can be locally concentrated, accompanied by distortion. This printing plate elongation and distortion had little problem in the case of single-color printing as in the past, but it was found that color printing, which performs four-color printing, appeared as misregistration.

Therefore, the inventor of the present invention has deliberately studied a bonding method that does not cause a subtle change in the printing plate, and has led to bonding the support and the printing plate in a cylindrical shape or an arc shape. Even if the printing plate attached in a cylindrical or arc shape is attached to the plate cylinder, there is almost no elongation or distortion of the printing plate, enabling adaptation to color printing.

Furthermore, compared to a conventional printing plate laminated on a flat surface, the printing plate bonded by the method of the present invention greatly reduces the stress caused by the expansion of the printing plate when mounted on a plate cylinder of a printing press. . Therefore, the printing plate does not deviate from the support during printing, and there is no problem even if the adhesive strength of the adhesive used is low. Therefore, it became possible to use a water-soluble adhesive, and after printing, the support was easily separated from the printing plate, and the support could be used repeatedly.

In the present invention, FIG. 4a (cylindrical shape) and FIG. 4b (arc cross-sectional shape) show the cylindrical shape or arc shape (cross section) when the support and the printing plate are bonded together. Considering the easiness of the laminating operation and the actual state of the printing press, it is preferable that the cross section in FIG. 4b is an arc shape.

Printing presses include sheet-fed presses and rotary presses, and the form of the plate cylinder is also different. In the case of sheet-fed presses in particular, the plate cylinder is provided with a vise at the notch, and the plate is not completely cylindrical when the plate is hung. In the present invention, the size of the arc when the support and the printing plate are bonded is preferably approximately the same as the size of the arc when the printing plate is mounted on the plate cylinder of a printing press. Having a range. In this case, the influence of the thickness of the support and the size of the printing plate can be considered. However, according to the research of the present inventors, the center angle of the arc when the support and the printing plate are bonded is 150 °. Degrees, preferably 180-340 degrees, more preferably 240-340 degrees. In this range, there is no plate change that affects color printing.

When the support and the printing plate are laminated in a cylindrical or arcuate shape according to the present invention, they generally do not return to a flat state (flat state) after the lamination. This is due to the elasticity of the support and the printing plate. Contrary to the above explanation, the printing plate needs to be shortened by 2 κa to return to the flat state.

Even if it does not return to a flat state after laminating in a cylindrical or arc shape, adaptation to color printing, which is the intended object of the present invention, can be achieved, but storage and handling of the laminated printing plate will be difficult. Problems arise. In particular, there arises a problem that the method cannot be applied to an automatic plate hanging apparatus which requires a flat state of a printing plate.

Therefore, as a result of further research, the present inventor has found that, when laminating in a circular or arc shape, a non-adhesive portion is provided in a direction substantially orthogonal to the bending direction in the cylindrical or arc shape. It has been found that the support and the printing plate bonded together in a cylindrical or arc shape can be returned to a flat state (flat state) without any resistance. This non-adhesive portion can be made by providing an uncoated portion of the adhesive when applying the adhesive to either the support or the printing plate. The width and number of the uncoated portions are not particularly limited, but the width is 1 to 5 cm, preferably 2 to 4 cm, and the number is 2 to 8, preferably 2 to 6. For example, in the case of a chrysanthemum half size, it is preferable that there are four uncoated areas, and in the case of a full chrysanthemum size, about six places.

Specifically, as shown in FIG. 6, an adhesive is applied to the support 11 by spraying using a mask 31. In Fig. 6, the arrow y is attached in a cylindrical or arc shape This is the bending direction at the time of bending. This bending direction corresponds to the rotation direction of the plate cylinder of the printing press. With the mask 31, an uncoated portion of the pressure-sensitive adhesive can be formed on the support in a direction substantially orthogonal to the bending direction y. The mask 31 has a pin hole 32. These pin holes are the same as the pin holes formed in the support and the printing plate. By installing a mask on the top of the support or the printing plate with reference to the pins, the uncoated area is always in the same place. The mask can be positioned parallel to the support or the printing plate.

A commercially available adhesive can be used, but a spray type adhesive is preferred in terms of workability. Further, it is preferred that the support has a certain degree of adhesiveness because the support is used repeatedly and that the printing plate can be easily peeled off after printing. For example, acrylate-butadiene copolymer, methacrylate-butadiene copolymer, styrene-butadiene copolymer. Acrylic acid-styrene-butadiene copolymer, methacrylic acid-styrene-butadiene copolymer or a carboxyl group-modified copolymer thereof may be used. It can be obtained from commercial products in the form of latex emulsion. Next, the meaning of providing the non-adhesive portion (the portion where the adhesive is not applied) will be described. When the support and the printing plate are bonded in a cylindrical or arcuate shape, the adhesive is applied to almost the entire surface of the support and bonded, and returns to a flat state as shown in Fig. 7a (cross-sectional view). Absent. On the other hand, by providing an uncoated portion of the adhesive, the uncoated portion 33 is loosened as shown in FIG. 7 b (cross-sectional view) and FIG. 8 (perspective view), thereby forming a cylindrical or arcuate shape. Absorbs the difference between the perimeters of the support and the printing plate (2π a) when they are bonded together, and easily returns to a flat state.

Next, a description will be given of a method of returning to a flat state after laminating in a cylindrical or arc shape without providing an uncoated portion of the adhesive. When applying adhesive on almost the entire surface of either the printing plate or the support and applying pressure to apply them, do not apply partial pressure in the direction orthogonal to the bending direction in the cylindrical or arc shape maybe Or by laminating with reduced pressure. The present inventor has found that even when the pressure-sensitive adhesive is applied, a portion where no pressure is applied or a portion where the pressure is reduced acts in the same manner as the above-mentioned uncoated portion, and easily becomes a flat state. The width and number of the portion to which the pressure is not applied or the portion to which the pressure is reduced are the same as those of the uncoated portion.

In the above method, it is preferable to provide a portion to which no pressure is applied, as compared with the case of providing a portion for reducing the pressure, since the portion more reliably functions as an uncoated portion of the adhesive. When a part to reduce the pressure is provided, the degree to which the pressure is made weaker than the pressure at the time of lamination depends on the rigidity of the support and the adhesive strength of the adhesive, so it cannot be determined unconditionally However, it is 50% or less, preferably 30% or less, with respect to the pressure at the time of bonding.

In the present invention, as compared with the former method of providing an uncoated portion of the pressure-sensitive adhesive, the latter method of providing a portion to which no pressure is applied or a portion to which the pressure is reduced in bonding is preferably used. In the former method of providing an uncoated portion, when the thickness of the printing plate is relatively thin, for example, 150 or less, the difference between the thickness of the uncoated portion and the coated portion (approximately 10 m) of the pressure-sensitive adhesive is a net. It is often observed that the difference appears in the reproducibility of high-resolution images such as point images. In addition, the latter method simplifies the application of the adhesive.

Next, an apparatus for carrying out the method for bonding a support and a printing plate in a cylindrical or arcuate shape according to the present invention will be described with reference to the drawings. FIGS. 1a, 1b and 1c are a plan view, a front view and a side view of a bonding apparatus of the present invention. FIG. 2 is a perspective view of the drum.

The bonding apparatus according to the present invention basically includes a drum 1 for forming a support and a printing plate into a cylindrical shape or an arc shape, and a pressing roller 2 that presses against the drum. On the outer peripheral surface, a support and a printing plate positioning means and a fixing means are respectively provided. Here, the fixing means may be any as long as it can be fixed so as not to move at least in the front, rear, left and right directions. In an embodiment of the present invention, Bin 3 is a support The positioning means and the fixing means of the printing plate, and the positioning means and the fixing means of the printing plate may also be used. In this case, it is necessary to provide pin holes (punch holes) in the printing plate and the support in advance. Normally, pin holes are often created in the process of making a printing plate (camera plate making machine or laser output machine).

The shape, number of pins 3 and the distance between pins 3 are determined in relation to the prepress camera, laser output machine or printing machine. Therefore, the pin 3 may be fixedly installed on the drum 1, but it is preferable that the pin 3 be detachable so as to be applicable to a plurality of types. Therefore, by preparing the pin bars 41 as shown in FIGS. 9a and 9b and attaching the pin bars 41 to the drum 1, it is possible to cope with various bin systems.

In this case, it is possible to easily introduce the pins into the current system by preparing the pins that match the pin standards used in the market.

When the printing plate size is large (more than half a chrysanthemum), it is generally difficult to insert into the pin 3 especially when an aluminum plate is used as a support. It is preferable to provide it separately. In this case, the positioning of the support is preferably performed by hitting two sides (either the head side or the side) of the support, and a contact member is used. In the embodiment of the present invention, the contact member uses a contact plate 4 on the head side and a contact pin 5 on the side. Here, the abutment plate 4 is configured so as to serve also as the pin bar 4 'described above. Electromagnetic stones 6 are used as a means for fixing the support. The electromagnet 6 is fixed to the drum 1. In addition, as a means for fixing the support, an adsorption method using air suction, a holding plate that is opened and closed by a cam shaft, and the like can be used.

By setting the support and the printing plate on the drum 1 based on the positioning means provided on the drum 1 and bonding them together, it is possible to always attach the printing plate to the same position on the support. In addition, the plate is usually positioned by two or three pins. Place the plate and fix the head, but the longer the distance between the pins, the more the plate head tends to rise. This is somewhat better before the drum 1 starts to rotate, that is, when the pin is at the top, but if it rotates a little, it shows a tendency to warp upward due to the waist of the printing plate itself. In order to solve this problem, it is preferable to provide a lifting prevention plate 7. The lifting prevention plates 7 are required at least at three positions, that is, the center and both ends in the width direction of the drum 1.

The lift prevention plate 7 may be directly attached to the drum 1 or may be attached to the pin bar 41 in advance.

Next, the size of the drum 1 will be described. As described above, the size of the drum 1 is preferably the same as the size of the plate cylinder of the printing press, but has some allowance for the size of the plate cylinder. As mentioned above, practically, it is designed to be the same as or larger than the plate cylinder.

The pressing roller 2 works in the direction of pressing against the drum 1, and serves to uniformly bond the printing plate and the support. The pressing roller 2 may press the printing plate and the support by its own weight, or may apply a force. Preferably, the pressing roller 2 has a certain amount of its own weight. In this case, the holding roller 2 preferably has a weight of 0.5 kg or more per 10 cm in the width direction, and more preferably has a weight of about 0.5 to 5 kg.

It is preferable that the pressing roller 2 rotates in conjunction with the rotation of the drum 1. The material of the press roller 2 is preferably an elastic body at least on its surface, and rubber is particularly preferable, in order not to damage the printing plate and to make the pressing force in the width direction uniform. Further, in order to have a certain amount of own weight as described above, and to prevent the presser roller from being bent by its own weight, it is preferable to have a metal core in the center of the press roller. .

It is important that the pressing roller 2 is installed horizontally so that the pressing force acts uniformly in the width direction of the drum 1. The drum 1 is supported by support rollers 10 and is driven and rotated by a motor 8 and a gear 9 attached around the drum 1.

When laminating the support and the printing plate using the laminating apparatus S of the present invention, the support can be wound in a cylindrical shape on the drum 1 in advance, and the printing plate can be laminated from above. As shown in FIG. 3, it is preferable that the support 11 and the printing plate 12 are bonded together along the drum 1 while being formed into a cylindrical shape.

The bonding apparatus S of the present invention has a holding table 13 of the support 11 for applying an adhesive before the support 11 is mounted on the drum 1. The support 11 is placed on the holder 13 and an adhesive is applied by spraying or the like. At this time, the head of the support 11 is provided with a mask 16 so that the adhesive is not applied. Further, a fan 17 for sucking and discharging the solvent contained in the adhesive is provided. The solvent sucked by the fan 17 is discharged outside through a duct (not shown) and collected. Hereinafter, a bonding method using the bonding device of the present invention will be described.

The support coated with the adhesive is mounted and fixed by a support fixing means on the drum. At this time, in order to easily attach the support 11 to the drum 1, use a drum encoder or the like so that the fixing means (electromagnet 6) of the support is at the position shown in FIGS. 1 b and 3 a. Is controlled to rotate by a predetermined amount.

The support 11 is positioned by contacting the side of the head end with the contact plate 4, the right side with the contact pin 5, and then fixing with the electromagnet 6.

As described above, the positioning and fixing of the support may be performed by inserting the pin holes of the support into the pins 3.

Next, the prepress plate 1 2 is mounted on the drum 1. At this time, the drum 1 is rotated by a predetermined amount so that the bin 3 serving as the fixing means and the positioning means of the printing plate 12 is almost at the top of the drum 1 as shown in FIG. 3b. The plate 1 2 is mounted by inserting the pin holes of the plate 1 2 into the pin 3 along the plate holder 14 that is horizontally arranged at almost the same height as the pin 3 of the drum 1. «To do. This plate holder 1 4 is coated with adhesive on the support It also serves to prevent the plate from coming into contact with the surface.

When the mounting of the support 11 and the printing plate 12 on the drum is completed, the laminating process is started. As shown in FIG. 3c, the drum 1 is rotated in the direction of the arrow, and the support 11 and the printing plate 12 are pressed together by the pressing roller 2 and bonded. The rotation of the drum 1 is stopped immediately before the tail end of the support 1 1 passes through the presser roller 2. This is performed by detecting the tail end of the support by the sensor 15 and controlling the rotation amount using an encoder or the like.

When the laminating process is completed, the drum 1 is set to rotate backward and return to the position where the laminating process started. At that time, when the back end of the bonded support and the printing plate is released from the pressing pressure of the pressing roller 2, the rigidity of the support discharges the printing plate along the plate holding table 14. . The bonded support and printing plate are removed from drum 1 and the bonding process is completed.

The laminating apparatus S of the present invention is provided with cutting blades 8 (FIG. C) for cutting both sides of the printing plate along the rotation direction of the drum 1. This is the process of making a printing plate, that is, if the plate size of a camera plate making machine or laser output machine is larger than the printing plate size, it is cut into the printing plate size in the laminating process. You.

Since the support is selected according to the size of the printing press, the position of the cutting blade is adjusted so that only the printing plate is cut. Cut the plate to the same width or slightly larger than the support. Cutting is performed simultaneously with lamination.

As the cutting blade, it is preferable to use a circle cutter, which is driven or rotated in conjunction with the rotation of the drum. At one or both sides of the circle cutter, a rotatable side plate for holding the cutter and holding down the printing plate is arranged. The cutter blade should protrude from this side plate by about 0.5 to 2 mm.

When cutting the printing plate, the contact pin 5 of the support provided on the drum becomes an obstacle to cutting. Is buried inside the drum 1 at the end of the process.

The laminating apparatus of the present invention is provided with a punch block 19 for punching a punch hole for hanging a plate on a printing machine on a support and a printing plate. The punch block 19 is set to operate after the support and the printing plate are pasted together. The punch block 19 has a mechanism in which a punch blade operates from the inside of the drum 1 toward the outer peripheral surface. Therefore, only the receiving portion of the punch blade exists on the outer peripheral surface of the drum.

Next, in order to implement a bonding method in which a part to which a pressing force is not applied or a part to which the pressing force is weakened is applied when bonding the printing plate and the support while pressing the printing plate and the support in a cylindrical or arc shape through an adhesive. Will be described.

1, 2 and 3, the pressing force release spacers (hereinafter referred to as spacers 1) 21 provided at both ends of the drum 1 are the printing plate mounting surfaces of the pressing rollers 6 2 2 It has the function of partially releasing the pressing force to the. This spacer 21 temporarily releases the press roller 2 from the plate mounting surface 22 of the drum 1 in the direction perpendicular to the rotation direction of the drum 1, and releases the pressing force on the plate mounting surface 22. It is configured to run.

The spacer 21 is interposed between the drum 1 and the pressing roller 2 only when the pressing pressure of the pressing roller 2 is released, and when pressing the printing plate mounting surface 2 2, the pressing roller 2 2 The space between the waves of the spacer 21 is designed to be lower than the plate mounting surface 22 so that the pressure can be sufficiently pressed. Although not shown in the drawings, an elastic sheet (for example, rubber sheet) is attached to the printing plate mounting surface 22 of the drum 1 and the thickness of the sheet is adjusted to obtain the above-described embodiment. To facilitate. It is also preferable to attach an elastic sheet in order to absorb the impact of the presser roller 2 on the printing plate. It is preferable that the spacer 21 has a constant-pitch waveform and a gentle waveform. If the angle of the waveform is large, when the presser roller 2 that has detached starts pressing the plate mounting surface 22 again, the impact of the press roller 2 against the plate mounting surface 22 becomes stronger, and the bonding is evenly performed. There is a problem with oneness. The pitch of the waveform varies depending on the size of the printing plate to be laminated. chrysanthemum In case of half size, about 4 waves are provided. In the case of Kikuzen, there are about six. Appropriate wave height is 0.5 to 3 cm and width is 2 to 5 cm.

In the present invention, as shown in FIG. 10, it is necessary to dispose the spacer 21 so that the pressing roller 2 does not contact the support and the plate positioning means and the fixing means.

When the spacer 21 is used, the pressure of the presser roller applied to the plate mounting surface 22 of the drum 1 changes with the rotation of the drum as shown in FIG. In FIG. 11, the horizontal axis represents the rotation direction of the drum, the vertical axis represents the pressing force of the press roller against the plate mounting surface 22, and the solid line represents the state in which the press pressure changes. (A) is the pressure due to the weight of the press roller (the pressure at the time of lamination), and (b) is the state where the weight of the press roller is completely released and the press pressure becomes zero. The state of the change in the pressing pressure on the plate mounting surface 22 depends on the waveform state of the spacer 21 and the material of the press roller 2 used. If the waveform state is constant, the curve from (a) to (b) becomes gentler when rubber with low hardness is used, and becomes steeper when rubber with high hardness is used. As described above, in the case of the chrysanthemum half size, the part (b) where the pressing force is completely released is set to be four places.

Here, after the printing plate and the support are bonded to each other in a cylindrical or arc shape, the flat state is attributable to the fact that when the presser pressure is completely released (b), the presser pressure becomes weaker. It is between (c) and (b). That is, the state (c) before the presser pressure is completely released contributes to the flat state. The position of (c) depends on the adhesive strength of the adhesive used and the rigidity of the support.

In the bonding apparatus of the present invention, it is preferable that the pressing force of the pressing roller is partially released in a direction perpendicular to the rotation direction of the drum, so that the shape of the spacer is designed. .

In the laminating apparatus of the present invention, the term “substantially canceling the pressing force of the pressing roller” means that the pressing force described above is used from an original purpose (return to a flat state after bonding). Includes the weakened states (c) to (b).

The above embodiment is an example in which a means for releasing the pressing force of the pressing roller is provided on the drum side, but an embodiment in which the pressing force releasing means is provided on the pressing roller side can also be adopted. In the present invention, the method of providing the uncoated portion of the pressure-sensitive adhesive and attaching the pressure-sensitive adhesive does not require the spacer 21 when performing the method. However, as described above, it is preferable to dispose a spacer only on the support member and the printing plate so that the pressing roller 2 does not come into contact with the positioning means and the fixing means. Industrial applicability

According to the present invention, a printing plate having low rigidity or strength, such as a paper plate or a resin plate, can be mounted on a printing press in the same manner as a PS plate, and can be applied to color printing. Also, since the printing plate can be stuck on the support with high positional accuracy, it can be quickly and smoothly mounted on the plate cylinder of the printing press.

Furthermore, it has the advantage of being compatible with the automatic plate mounting device S, similarly to the PS plate. Further, the laminating method and apparatus of the present invention can be applied to lamination with a support for adjusting the thickness of a printing plate.

Claims

The scope of the claims

1. A method of bonding a support and a printing plate before mounting the printing plate in a printing press, wherein the bonding is performed while the support and the printing plate are formed in a cylindrical or arcuate shape.

2. Before attaching the printing plate to the printing press, the method of bonding the support and the printing plate requires that one of the support and the printing plate be cylindrical or arcuate and then the other be bonded. Characteristic lamination method.

3. The bonding method according to claim 1 or 2, wherein the support is an aluminum plate, and the printing plate is based on paper or plastic resin film coated with polyolefin resin. Lamination method that is a printing plate.

4. The bonding method according to item 1 or 2, wherein the size of the circular arc is 150 degrees or more at the center angle.

5. The bonding method according to claim 1, wherein a non-adhesive portion is provided in a direction orthogonal to a bending direction in a cylindrical or arcuate shape.

6. A method of bonding by applying pressure via an adhesive or an adhesive using the bonding method according to claim 1 or 2, wherein the bending direction is cylindrical or arc-shaped. A laminating method characterized in that the laminating is performed by not applying partial pressure in the direction perpendicular to the substrate or by reducing the pressure.

7. Means for positioning the support, means for fixing the top end of the support, positioning of the printing plate A drum having a fixing means and a means for fixing the top end of the printing plate; and a press roller which acts to press the drum against the drum.

8. The means for positioning the support and the means for fixing the tip of the head of the support are composed of two or more pins, and the pins are the means for positioning the plate and the tip of the head of the plate. 8. The apparatus for laminating a support and a printing plate according to claim 7, wherein the apparatus also serves as a means for fixing the plate.

9. The support locating means is constituted by a contact member on the head side and a contact member on a side of the support, and the fixing means for the support is an electromagnet. A bonding device S for a support and a printing plate as described in paragraph 7 of the scope.

10. The pressing roller according to claim 7, wherein the pressing roller presses the drum with its own weight of 0.5 kg or more per 10 cm in the width direction of the pressing roller. Laminating device for plate and plate.

11. The method according to claim 7, wherein the pressing force of the pressing roller against the drum is partially partially released in a direction orthogonal to the rotation direction of the drum. An apparatus for laminating a support and a printing plate as described above.

12. The apparatus for laminating a support and a printing plate according to claim 11, wherein a corrugated spacer is interposed between the drum and the pressing roller.

13. The bonding apparatus according to claim 7, wherein the drum has a lifting prevention means for preventing the printing plate head from lifting.

14. A cutting means for cutting a printing plate in a rotating direction of the drum. A support and printing plate laminating apparatus according to claim 7, wherein:

15. The lamination of the support and the plate according to claim 7, wherein the drum has a punch hole making means for making a punch hole for hanging a plate on a printing machine on the support and the plate. Device.