JP2009226876A - Sleeve printing plate and method of manufacturing sleeve printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sleeve printing plate and a method of manufacturing the sleeve printing plate that can be manufactured at a low cost, recycled as a raw material of plastic resin or a rubber material after use, and stored and transported in a space-saving manner. <P>SOLUTION: The sleeve printing plate 30 mounted to a cylinder of a printer for use has a cylindrical sleeve plate material 31 formed of plastic resin or a rubber material with Shore (A) hardness of 30 to 100, and plate bodies 33 with image data are provided engraved on the outer peripheral surface of the sleeve plate material 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sleeve printing plate used by being mounted on a cylinder of a printing apparatus, and a method for manufacturing the sleeve printing plate.

The sleeve printing plate described above is widely used in the fields of flexographic printing and letterpress printing, as described in, for example, Patent Document 1. Further, as described in Patent Document 2, a sleeve printing plate is also applied in the field of offset printing for cylindrical objects such as cans.
In the sleeve printing plate, since the circumferential position of the image pattern is preset on the sleeve support, the image pattern can be registered by aligning the sleeve support and the plate cylinder, It is possible to greatly reduce the time and labor required for the image pattern exchange work.

  This sleeve printing plate is usually made of a fiber reinforced plastic (FRP) sleeve support and an outer peripheral surface of the sleeve support, and is formed of a photosensitive resin that can be engraved with laser light, for example, to form an image pattern. And a printed plate body. Here, the thickness of the sleeve support is about 1 mm, and the cylindrical shape is maintained.

In such a sleeve printing plate, a fiber reinforced plastic (FRP) sleeve is formed by repeatedly wrapping reinforcing fibers around a fixed base having a cylindrical surface, and applying and curing a molten plastic resin. It is manufactured by producing a support and placing a plastic resin or rubber material as a plate material on the outer peripheral surface of the sleeve support.
JP 2006-326938 A JP 2006-272682 A

By the way, in the conventional sleeve printing plate, since the plate material made of plastic resin or rubber material is disposed on the outer peripheral surface of the FRP sleeve support, the sleeve printing plate after use is separated. It could not be reused as a raw material for plastic resin or rubber material, and all had to be disposed of.
In addition, since the sleeve support body having high rigidity is provided, it is difficult to deform the sleeve printing plate, and a lot of space is required for storage and transportation.
Further, in the conventional method for producing a sleeve printing plate, after a molten plastic resin is applied and cured repeatedly to form an FRP sleeve support, a plate made of plastic resin or rubber material is further formed. Therefore, it takes a lot of time and labor to produce the sleeve printing plate, and there is a problem that the production cost becomes high.

  The present invention has been made in view of the above-described circumstances, and can be manufactured at low cost, can be reused as a raw material for plastic resin or rubber material after use, and can be stored and transported in a space-saving manner. It is an object of the present invention to provide a possible sleeve printing plate and a method for producing this sleeve printing plate.

  In order to solve the above-described problems, a sleeve printing plate according to the present invention is a sleeve printing plate used by being mounted on a cylinder of a printing apparatus, and has a Shore (A) hardness of 30 to 100 plastic resin or rubber. The sleeve plate material is formed of a material and has a cylindrical shape, and a plate body having image data is engraved on the outer peripheral surface of the sleeve plate material.

  According to the sleeve printing plate of this structure, the plate body having image data is engraved on the outer peripheral surface of the sleeve plate material formed of plastic resin or rubber material, and the sleeve printing plate has the FRP sleeve support. Since it is composed only of plastic resin or rubber material, the used sleeve printing plate can be reused as a raw material for plastic resin or rubber material. Further, since the FRP sleeve support is not provided, the step of manufacturing the sleeve support can be omitted, and the sleeve printing plate can be manufactured at a low cost.

  Further, since the sleeve plate material is made of a plastic resin or rubber material having a Shore (A) hardness of 30 to 100, the sleeve printing plate itself is relatively easily deformed and can be deformed to be crushed and a printing apparatus. It can be used for printing after being restored to a cylindrical shape. Therefore, the sleeve printing plate can be stored and transported in a deformed state so as to be crushed, and the storage space can be kept small.

Here, it is preferable to set the thickness t of the sleeve plate material within a range of 1 mm ≦ t ≦ 3 mm.
In this case, since the thickness t of the sleeve plate material is 3 mm or less, the sleeve printing plate can be easily deformed so as to be crushed. Further, since the thickness t of the sleeve plate material is set to 1 mm or more, the thickness and rigidity for forming the unevenness of the relief plate are ensured, and the inner diameter change due to elongation can be suppressed.

The sleeve plate material is preferably formed by extrusion.
In this case, a seamless sleeve plate material is formed by extrusion molding, and the plate body having image data can be disposed at an arbitrary position in the circumferential direction. Further, it is not necessary to repeat the step of applying and curing a plastic resin or rubber material, and this sleeve printing plate can be manufactured at low cost.

Furthermore, the sleeve plate material may have a structure in which two or more plastic resins or rubber materials having different hardnesses are laminated.
In this case, it is possible to provide a sleeve printing plate having characteristics according to use conditions by laminating plastic resins or rubber materials having different hardnesses. In addition, the recyclability of the sleeve printing plate after use can be ensured by laminating the same kind of plastic resin or rubber material with varying hardness.

  The method for manufacturing a sleeve printing plate according to the present invention is a method for manufacturing a sleeve printing plate that is used by being mounted on a cylinder of a printing apparatus, and a plastic resin or rubber material is provided on a cylindrical surface of a carrier roll having a cylindrical surface. The plastic resin or rubber material that has adhered is cooled and solidified to form a sleeve plate material having a Shore (A) hardness of 30 to 100, and the sleeve plate material is removed from the carrier roll. And a process.

According to the manufacturing method of the sleeve printing plate having this configuration, the plastic resin or the rubber material is attached to the cylindrical surface of the carrier roll having the cylindrical surface, and the attached plastic resin or the rubber material is cooled and solidified, and the shore (A) Since it has an extrusion molding process for forming a sleeve plate having a hardness of 30 to 100, it is not necessary to repeat the process of applying and curing a plastic resin or rubber material, and the time and labor required for manufacturing the sleeve printing plate Can be greatly reduced.

Here, it is preferable to provide a grinding step of grinding the outer peripheral surface of the sleeve plate material formed on the outer peripheral side of the carrier roll after the extrusion molding step.
In this case, since the outer peripheral surface of the sleeve plate material is uniformly formed by the grinding step, it is possible to provide a sleeve printing plate capable of printing with high accuracy.

Preferably, the carrier roll is provided with an air hole that opens to the cylindrical surface, and the sleeve plate material is expanded in diameter by ejecting air from the air hole in the separation step.
In this case, the sleeve plate material is expanded in diameter by the air ejected from the air hole, and the sleeve plate material can be easily detached from the carrier roll, and an unreasonable force acts on the sleeve plate material in the separation process. Without producing a high-quality sleeve printing plate.

  According to the present invention, a sleeve printing plate that can be manufactured at low cost, can be reused as a raw material for plastic resin or rubber material after use, and can be stored and transported in a space-saving manner. A manufacturing method can be provided.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, the sleeve printing plate 30 according to the present embodiment includes a sleeve plate material 31 having a cylindrical shape extending along the axis O. The thickness t of the sleeve plate material 31 is constant in the direction of the axis O and in the circumferential direction, and is set within a range of 1 mm ≦ t ≦ 3 mm. In this embodiment, t = 2 mm.

  The sleeve plate material 31 is made of a plastic resin or rubber material having a Shore (A) hardness of 30 to 100, and in this embodiment, a photosensitive resin that can be engraved with laser light. Examples of the plastic resin or rubber material constituting the sleeve plate material 31 having a Shore (A) hardness of 30 to 100 include polyurethane and methacrylate. The material of the sleeve plate material 31 is preferably selected in consideration of the characteristics of the ink to be stacked, the properties of the printing material, and the like.

  A relief plate 33 (plate body) having an image pattern is engraved on the outer peripheral surface of the sleeve plate material 31 by etching or laser processing. In the present embodiment, as shown in FIG. 2, the two relief plates 33 and 33 are engraved at positions facing each other across the axis O.

  Further, as described above, the sleeve plate material 31 is made of a plastic resin or rubber material having a Shore (A) hardness of 30 to 100, and a portion facing the axis O is directed radially inward. When a pressing force is applied, or when a tension is applied to a portion of the sleeve support 31 facing the axis O across the axis O toward the outside in the radial direction, the sleeve support 31 is deformed so as to be crushed. The structure can be restored to the cylindrical shape after removing the tension.

Next, a method for manufacturing the sleeve printing plate 30 will be described.
FIG. 3 shows a flowchart of the method for manufacturing the sleeve printing plate 30 according to the present embodiment. FIG. 4 shows a carrier roll 40 used in the method for manufacturing the sleeve printing plate 30 according to this embodiment.
First, a release agent containing silicon is applied to the cylindrical surface 41 of the carrier roll 40 (release agent application step S1).

Next, extrusion molding is performed using the carrier roll 40, and a plastic resin or rubber material is attached to the cylindrical surface 41 of the carrier roll 40. The attached plastic resin or rubber material is cooled and solidified to form the sleeve plate material 31. Molding (extrusion molding step S2).
Next, the outer peripheral surface and end surface of the sleeve plate material 31 formed on the cylindrical surface 41 of the carrier roll 40 are ground to adjust the shape (grinding step S3).
Then, the sleeve plate material 31 is detached from the cylindrical surface 41 of the carrier roll 40 (detachment step S4). In this way, the sleeve plate material 31 made of plastic resin or rubber material is produced.
Then, laser processing is performed on the outer peripheral surface of the sleeve plate material 31, and a relief plate 33 (plate body) having an image pattern is engraved (letter plate forming step S5).

Next, the carrier roll 40 will be described. As shown in FIG. 4, the carrier roll 40 has a cylindrical shape having a cylindrical surface 41 and extending along the axis L. One end of the carrier roll in the direction of the axis L (left end in FIG. 4) communicates with the internal space S of the carrier roll 40, and gradually increases in diameter toward the other end (right end in FIG. 4) of the carrier roll 40. A tapered hole 42 is formed which becomes smaller.
The carrier roll 40 has a plurality of air holes 43 that open to the cylindrical surface 41 and communicate with the internal space S of the carrier roll 40.

The other end of the carrier roll 40 is provided with a bottom wall portion 44 extending so as to be orthogonal to the axis L. In the vicinity of the axis L of the bottom wall portion 44 (center portion), the other end side is directed. A protruding portion 45 is formed. In addition, this protrusion part 45 is set as the structure which can be inserted in the taper hole 42 mentioned above. A center guide hole 46 is formed at the position of the axis L on the other end surface of the protrusion 45.
On the cylindrical surface 41 of the carrier roll 40, a layer made of a material having good smoothness such as fluororesin or silicon is formed. In this embodiment, in the release agent coating step S1, A release agent containing silicon is applied.

Next, the extrusion molding apparatus 50 which performs extrusion molding process S2 is demonstrated with reference to FIG.
The extrusion molding apparatus 50 includes a molding unit 51 that molds the sleeve plate material 31 on the cylindrical surface 41 of the carrier roll 40, an extrusion unit 52 that pushes the carrier roll 40 into the molding unit 51, and the sleeve plate material 31 on the cylindrical surface 41. And a carrier roll carry-out portion 53 for carrying out the carrier roll 40 formed of

  As shown in FIG. 5, the extruding part 52 inserts the protruding part 45 of the other carrier roll 40 into the tapered hole 42 formed on one end side of the one carrier roll 40, whereby the two carrier rolls 40, 40 is arranged on the same axis, and the two carrier rolls 40, 40 are pushed out along the axis L (toward the extrusion direction X) by the hydraulic cylinder 54 to the forming portion 51.

The molding unit 51 supplies the melted plastic resin or rubber material to adhere the plastic resin or rubber material to the cylindrical surface 41 of the carrier roll 40, and cools and solidifies the adhered plastic resin or rubber material. The extrusion air nozzle 56 and the cooling air nozzle 56 are arranged in a row in the extrusion direction X.
The carrier roll carry-out part 53 is a belt conveyor 57 disposed on the outlet side of the forming part 51.
The carrier roll 40 in which the sleeve plate material 31 is formed on the cylindrical surface 41 is carried out of the extrusion apparatus 50 by the belt conveyor 57.

Next, the grinding device 60 that performs the grinding step S3 will be described with reference to FIG.
The grinding device 60 includes a rotation support portion 61 that rotatably supports the carrier roll 40 about the axis L, a first grindstone portion 66 located on the outer peripheral side of the carrier roll 40, and an end portion in the axis L direction of the carrier roll 40. 2nd grindstone part 67 located in the side.

The rotation support portion 61 includes a first arm portion 62 inserted into a tapered hole 42 opened on one end side of the carrier roll 40, and a center guide hole 46 provided in a protruding portion 45 located on the other end side of the carrier roll 40. The first arm 62 and the second arm 63 are arranged coaxially (on the axis L), and the carrier roll 40 is centered on the axis L. It is comprised so that it may rotate.
The first grindstone portion 66 is configured to be movable in the axis L direction and the radial direction, and finishes smoothly by grinding the outer peripheral surface of the sleeve plate material 31 formed on the cylindrical surface 41 of the carrier roll 40. is there.
The second grindstone portion 67 is located on the other end side of the carrier roll 40 and is movable in the axis L direction and the radial direction, and grinds the end surface of the sleeve plate material 31.

Next, the detachment device 70 that performs the detachment step S4 will be described with reference to FIG.
The separation device 70 includes a hydraulic cylinder 71 that presses in the pressing direction Y along the axis L from one end side of the carrier roll 40, an air supply unit 72 that supplies air to the internal space S of the carrier roll 40, a carrier A finger portion 73 for peeling the sleeve plate material 31 from the roll 40 and a sleeve plate material carry-out portion 74 for carrying the peeled sleeve plate material 31 to the outside are provided.

When performing the separation step S <b> 4 using the separation device 70, air is supplied from the air supply unit 72 to the internal space S of the carrier roll 40, and the air is ejected from the air holes 43 of the carrier roll 40. As a result, the diameter of the sleeve plate material 31 is expanded to create a space between the cylindrical surface 41 of the carrier roll 40 and the sleeve plate material 31, pressed by the hydraulic cylinder 71, and the sleeve plate material 31 is held by the fingers 73. Remove from roll 40. The sleeve plate material 31 thus peeled off is carried out of the separation device 70 by the sleeve plate material carrying-out portion 74.
In this case, the air hole 43 is located at a position avoiding the portion where the image pattern is formed, for example, the carrier roll 40 so that variations in the thickness of the sleeve plate material 31 formed by the air hole 43 are not affected during printing. It is desirable to provide in the vicinity of both ends.

In this way, the sleeve plate material 31 according to the present embodiment is produced. Then, a relief plate 33 (plate body) having an image pattern is engraved on the outer peripheral surface of the sleeve plate material 31 by etching or laser processing. In the present embodiment, the relief plate 33 is directly engraved by a CO ₂ laser processing machine. Here, the laser processing conditions are preferably performed at a wavelength of 2.5 to 11 μm and an output of 100 to 500 W, and in this embodiment, a wavelength of 10.6 μm and an output of 200 W.

Next, an offset printing apparatus A using the sleeve printing plate 30 according to the present embodiment will be described. An outline of the offset printing apparatus A is shown in FIG. The offset printing apparatus A is a can printing apparatus that performs printing on an outer peripheral surface of a cylindrical can.
The offset printing apparatus A is schematically configured by a plurality of ink adhesion mechanisms B and can moving mechanisms C.

The ink adhering mechanism B includes an inker unit 1 that supplies ink, and a blanket 9 that contacts the outer surface of the can body 20 and prints (adheres) the ink after contacting the inker unit 1 and copying the ink. And a blanket wheel 8 having a plurality of sheets.
The inker unit 1 includes an ink source 2, a ducting roll 3 that contacts the ink source 2 and receives ink, an intermediate roller 4 that is connected to the ducting roll 3 and includes a plurality of rollers, and the intermediate roller 4 A sleeve printing plate 30 having a relief plate 33 provided with an image pattern to be transferred to the can cylinder 20 is disposed on the outer peripheral surface of the plate cylinder 6. The sleeve printing plate 30 includes a rubber roller 5 to be connected and a plate cylinder 6 connected to the rubber roller 5. Has been. A plurality of blankets 9 are provided on the outer peripheral surface of the blanket wheel 8, and the blanket 9 is in contact with the relief plate 33 of the sleeve printing plate 30 disposed on the outer peripheral surface of the plate cylinder 6 and the can cylinder 20. It is set as the structure which contacts.

  The can moving mechanism C sequentially includes a can shooter 10 for taking in the can body 20, a mandrel 11 for rotatably holding the can body 20 supplied from the can shooter 10, and a can body 20 mounted on the mandrel 11. , And a mandrel turret 12 that rotates in the direction of the ink adhesion mechanism B.

As shown in FIG. 9, the plate cylinder 6 has a cylindrical shape, and includes a cylinder 6a that is rotatably supported in a cantilevered state on the shaft portion of the printing apparatus A. On the outer peripheral side of the cylinder 6a, A sleeve printing plate 30 according to this embodiment is fitted. Here, the inner diameter of the sleeve printing plate 30 and the outer diameter of the cylinder 6a are set to be substantially the same. Note that a plurality of air holes (not shown) are formed on the outer peripheral surface of the cylinder 6a, and the inner diameter of the sleeve printing plate 30 is expanded by air blown from the air holes so that the cylinder 6a is attached to and detached from the cylinder 6a. Has been.
By mounting the cylinder 6a in this manner, the sleeve printing plate 30 that has been deformed so as to be crushed is restored to a cylindrical shape.

  In the offset printing apparatus A in which the sleeve printing plate 30 is arranged in this way, different colors of ink from the ink source 2 of each inker unit 1 pass through the ducting roll 3, the intermediate roller 4, and the rubber roller 5. The ink of each color is put on the blanket 9 on the rotating blanket wheel 8 as a pattern, and this pattern is held by the mandrel 11. It is printed while contacting the can body 20.

  According to the sleeve printing plate 30 according to the present embodiment, a relief plate 33 having image data is engraved on the outer peripheral surface of a sleeve plate material 31 formed of a plastic resin or a rubber material, and a sleeve support made of FRP is used. The sleeve printing plate 30 after use can be reused as a raw material for the plastic resin or rubber material.

  Further, since the sleeve plate material 31 is made of a plastic resin or rubber material having a Shore (A) hardness of 30 to 100, the sleeve printing plate 30 itself is relatively easily deformed and can be deformed to be crushed. Further, it can be restored to a cylindrical shape by being mounted on the cylinder 6a of the printing apparatus. Therefore, the sleeve printing plate 30 can be stored and transported in a deformed state so as to be crushed, and the storage space and the like can be kept small.

Further, since the wall thickness t of the sleeve plate material 31 is set within a range of 1 mm ≦ t ≦ 3 mm, and in this embodiment, t = 2 mm, the sleeve printing plate 30 is easily crushed as described above. In addition, the thickness for forming the unevenness of the relief plate 33 and a certain rigidity are ensured, and the change in the inner diameter of the sleeve printing plate 30 due to elongation can be suppressed.
Furthermore, since the sleeve plate material 31 is formed by the extrusion molding step S2, the sleeve plate material 31 without a joint on the outer peripheral surface is formed, and the relief plate 33 having image data is placed at an arbitrary position in the circumferential direction. Can be engraved.

  In addition, according to the method for manufacturing the sleeve printing plate 30 according to the present embodiment, the plastic roll or rubber material is attached to the cylindrical surface 41 using the carrier roll 40 having the cylindrical surface 41, and the attached plastic resin or rubber is attached. Since the extrusion molding step S2 for forming the sleeve plate material 31 by cooling and solidifying the material is provided, it is not necessary to repeat the step of applying and curing the plastic resin or the rubber material, and the sleeve printing plate 30 is manufactured. Time and labor can be greatly reduced, and the sleeve printing plate 30 can be manufactured at low cost.

  In addition, since the grinding step S3 for grinding the outer peripheral surface and the end face of the sleeve plate material 31 is provided after the extrusion molding step S2, the shape of the sleeve plate material 31 is adjusted by this grinding step S3. Therefore, the sleeve printing plate 30 capable of printing with high accuracy can be provided.

  Further, the carrier roll 40 is provided with an air hole 43 that opens into the cylindrical surface 41 and communicates with the internal space S of the carrier roll 40. In the separation step S4, air is ejected from the air hole 43 to form a sleeve plate. Since the diameter of the material 31 is increased to create a space between the cylindrical surface 41 of the carrier roll 40 and the sleeve plate material 31, the sleeve plate material 31 can be easily detached from the carrier roll 40.

  Moreover, in this embodiment, since it has mold release agent application | coating process S1 which apply | coats mold release agents, such as a silicon | silicone, to the cylindrical surface 41 of the carrier roll 40 before extrusion molding process S2, the carrier roll 40 and sleeve The smoothness with the plate material 31 is ensured, and the sleeve plate material 31 can be further easily detached in the separation step S4.

  Furthermore, since the relief plate 33 having image data is directly engraved on the outer peripheral surface of the sleeve plate material 31 by laser processing, it is not necessary to adjust the circumferential position of the relief plate 33 or the position in the axis O direction. Further, the image data can be formed with high accuracy, and the print quality can be further improved.

Next, a sleeve printing plate 130 according to a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, as shown in FIGS. 10 and 11, the sleeve plate member 131 is formed by laminating two plastic resins or rubber materials having different hardnesses. More specifically, an outer peripheral layer 135 made of a plastic resin or rubber material having a low hardness and an inner peripheral layer 136 made of a plastic resin or rubber material having a high hardness are provided. The plastic resin or the rubber material constituting the outer peripheral layer 135 and the inner peripheral layer 136 are both in a range of 30 to 100 in Shore (A) hardness. Further, in the present embodiment, the same type of plastic resin or rubber material whose hardness is changed is laminated.

  Such a sleeve plate member 131 is formed by arranging two extrusion nozzles in a column in the extrusion direction X in a molding portion of an extrusion molding apparatus. It becomes possible to mold by so-called coextrusion molding.

According to the sleeve printing plate 130 of the present embodiment configured as described above, ink transferability can be ensured by the outer peripheral layer 135 having low hardness, and the rigidity of the relief plate 133 can be increased by the inner peripheral layer 136 having high hardness. As a result, it is possible to ensure printing with high accuracy.
Further, since both the outer peripheral layer 135 and the inner peripheral layer 136 are made of a plastic resin or rubber material having a Shore (A) hardness in the range of 30 to 100, they can be deformed so as to be crushed. It can be restored to a cylindrical shape by attaching to the cylinder.
Furthermore, since the same kind of plastic resin or rubber material with a changed hardness is laminated, the recyclability of the sleeve printing plate 130 after use can be ensured.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this, It can change suitably in the range which does not deviate from the technical idea of the invention.
For example, in the present embodiment, it has been described that the relief plate is formed on the outer peripheral surface of the sleeve plate material by laser processing, but the invention is not limited to this, and the relief plate may be formed by etching or the like.

Moreover, although demonstrated as what uses the extrusion molding apparatus, grinding apparatus, and detachment | leave apparatus shown in FIGS. 5-7, it is not limited to these apparatuses, You may use the apparatus of another structure.
Furthermore, although it demonstrated as having the mold release agent application | coating process which apply | coats mold release agents, such as a silicon | silicone, to the cylindrical surface of a carrier roll, it is not limited to this, For example, the cylindrical surface part of a carrier roll is fluororesin Alternatively, it may be formed of a material having good smoothness such as.

It is a perspective view of the sleeve printing plate which is one Embodiment of this invention. It is the figure which looked at the sleeve printing plate of FIG. 1 from the axial direction. It is a flowchart of the manufacturing method of the sleeve printing plate which is one Embodiment of this invention. It is sectional drawing of the carrier roll used for the manufacturing method of the sleeve printing plate which is this embodiment. It is explanatory drawing of the extrusion molding apparatus used for the manufacturing method of the sleeve printing plate which is this embodiment. It is explanatory drawing of the grinding device used for the manufacturing method of the sleeve printing plate which is this embodiment. It is explanatory drawing of the peeling apparatus used for the manufacturing method of the sleeve printing plate which is this embodiment. It is the schematic of the printing apparatus in which the sleeve printing plate which is this embodiment is used. It is explanatory drawing which shows the plate cylinder to which the sleeve printing plate which is this embodiment was mounted | worn. It is a perspective view of the sleeve printing plate which is the 2nd Embodiment of this invention. It is the figure which looked at the sleeve printing plate of FIG. 10 from the axial direction.

Explanation of symbols

30 Sleeve printing plate 31 Sleeve plate material 33 Letterpress (plate body)
40 Carrier roll 43 Air hole S2 Extrusion process S3 Grinding process S4 Removal process

Claims (7)

A sleeve printing plate used by being mounted on a cylinder of a printing apparatus,
A shore (A) hardness is formed of a plastic resin or rubber material having a hardness of 30 to 100, and has a cylindrical sleeve plate material. A plate body having image data is engraved on the outer peripheral surface of the sleeve plate material. A sleeve printing plate characterized by the fact that   The sleeve printing plate according to claim 1, wherein a thickness t of the sleeve plate material is set in a range of 1 mm ≤ t ≤ 3 mm.   The sleeve printing plate according to claim 1 or 2, wherein the sleeve plate material is formed by extrusion molding.   The sleeve printing plate according to any one of claims 1 to 3, wherein the sleeve plate material is configured by laminating two or more plastic resins or rubber materials having different hardnesses. A method of manufacturing a sleeve printing plate used by being mounted on a cylinder of a printing apparatus,
Extrusion in which a plastic resin or rubber material is attached to the cylindrical surface of a carrier roll having a cylindrical surface, and the attached plastic resin or rubber material is cooled and solidified to form a sleeve plate material having a Shore (A) hardness of 30 to 100 Molding process;
And a detaching step of removing the sleeve plate material from the carrier roll.   The sleeve printing plate manufacturing method according to claim 5, wherein a grinding step of grinding an outer peripheral surface of the sleeve plate material formed on the cylindrical surface of the carrier roll is provided after the extrusion molding step. Method.   The carrier roll is provided with an air hole that opens in the cylindrical surface, and the sleeve plate material is expanded in diameter by ejecting air from the air hole in the separation step. The manufacturing method of the sleeve printing plate of Claim 5 or Claim 6.

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