JP2010162878A - Method for manufacturing sleeve printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a sleeve printing plate, capable of manufacturing the sleeve printing plate efficiently and at a low cost. <P>SOLUTION: The sleeve printing plate includes a sleeve supporting body with a cylindrical shape, and a printing plate body arranged on the outer peripheral face of the sleeve supporting body and on which an image pattern printing on an article to be printed is formed, and is used by being mounted on a cylinder of an printing apparatus. The method for manufacturing the sleeve printing plates includes a step S2 for winding a plastic sheet material on a fixing stand having a cylindrical face, and a step S4 for obtaining the sleeve supporting body by fusing one end of the plastic sheet material wound with the other end thereof by ultrasonic joining or laser welding. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a printing plate body provided with an image pattern for printing on a printing material on the outer peripheral surface of a cylindrical sleeve support, and is used by being mounted on a cylinder of a printing apparatus. It is about the method.

  2. Description of the Related Art Conventionally, plate printing plates formed in a plate shape have been widely provided as printing plates used by being mounted on a cylinder of a printing apparatus. Since this plate printing plate is used by being attached to the outer peripheral surface of a cylinder, it is necessary to accurately adjust the position of the image pattern in the circumferential direction and the axial direction position. In particular, when a plurality of image patterns are provided in one cylinder or when multicolor printing is performed, it is necessary to register these image patterns with higher accuracy. For this reason, a great deal of time and labor are required for exchanging image patterns.

Therefore, as described in Patent Document 1, for example, the above-mentioned sleeve printing plate is widely used in the fields of flexographic printing and letterpress printing. 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.
This sleeve printing plate is usually made of a fiber reinforced plastic (FRP) sleeve support and a photosensitive resin which is arranged on the outer peripheral surface of the sleeve support and can be engraved with laser light to form an image pattern. And the plate body. Here, the thickness of the sleeve support is about 1 mm, and the cylindrical shape is maintained.

  In this 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 cylinder. It is possible to greatly reduce the time and labor required for the image pattern exchange work.

JP 2006-326938 A JP 2006-272682 A

  By the way, in the conventional method for manufacturing a sleeve printing plate, a reinforcing fiber is wound around a fixed base having a cylindrical surface, and a molten plastic resin is applied and cured repeatedly, thereby making it a fiber reinforced plastic (FRP) product. The sleeve support is manufactured and the plate material is disposed on the outer peripheral surface of the sleeve support. For this reason, it takes much time and labor to produce the sleeve support, and the production efficiency of the sleeve printing plate is low and the production cost is high.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a method for producing a sleeve printing plate capable of producing a sleeve printing plate efficiently and at low cost.

  In order to solve the above-described problems, a method for manufacturing a sleeve printing plate according to the present invention includes a cylindrical sleeve support, and an image pattern that is disposed on an outer peripheral surface of the sleeve support and is printed on a printing material. A printing plate body, and a method for producing a sleeve printing plate to be used by being mounted on a cylinder of a printing apparatus, the step of winding a plastic sheet material around a fixing table having a cylindrical surface, and the fixing table A step of fusing one end and the other end of the plastic sheet material wound around to obtain the sleeve support by ultrasonic bonding or laser welding. Yes.

  According to the method of manufacturing a sleeve printing plate having this configuration, a plastic sheet material is wound around a fixed base, and one end portion and the other end portion of the plastic sheet material are fused by ultrasonic bonding or laser welding. Since the step of obtaining the sleeve support is provided, there is no need to repeatedly apply and cure the molten plastic resin by wrapping the reinforcing fibers, and the sleeve printing plate can be manufactured at a low cost. be able to. In addition, since one end and the other end of the plastic sheet material are fused by ultrasonic bonding or laser welding, only the bonded portion can be locally heated and fused. The thermal influence on the part can be suppressed. In addition, since ultrasonic bonding and laser welding are completed in a short time, the sleeve support can be mass-produced, and the manufacturing cost can be further reduced.

When laser bonding is performed, laser light may be irradiated in a state where one end of the plastic sheet material and the other end are just abutted, but in order to more efficiently locally heat Further, a laser absorbent is applied to one end and the other end of the plastic sheet material, the one end and the other end of the plastic sheet material are butted, and the butted portion is irradiated with laser. It is preferable.
Further, as a material constituting the plastic sheet material, various plastic materials such as polyethylene terephthalate (PET), vinyl chloride (PVC), polyethylene (PE), polyethylene naphthalate (PEN) described later can be applied.

Here, at least a portion where the one end portion and the other end portion of the plastic sheet material are arranged in the fixing base is made of a resonance material that resonates with the ultrasonic wave, and is wound around the fixing base. It is preferable that one end portion and the other end portion of the plastic sheet material obtained are fused by ultrasonic bonding.
In this case, when an ultrasonic wave is applied to the plastic sheet material wound around the fixing base from the outside (the outer peripheral side of the plastic sheet material), the ultrasonic waves resonate at the fixing base, and the fixing base side (plastic sheet material) The ultrasonic waves are also applied from the inner peripheral side of the. Thereby, it becomes possible to join a plastic sheet material efficiently. Moreover, since the inner peripheral surface side of the sleeve support to be produced is also fused, the inner peripheral surface of the sleeve support can be finished to a smooth surface along the cylindrical surface of the fixed base.

Here, it is preferable to have a cutting step of cutting a long plastic sheet material to obtain the plastic sheet material having a predetermined length.
In this case, a plastic sheet material having a predetermined length can be stably obtained by the cutting process, and the one end portion and the other end portion of the plastic sheet material are accurately placed when wound around a fixed base having a cylindrical surface. It becomes possible to match well. For this reason, a sleeve printing plate can be manufactured efficiently and with high dimensional accuracy.

Moreover, it is preferable that the outer diameter of the cylindrical surface of the fixed base is set smaller than the outer diameter of the cylinder on which the sleeve printing plate is mounted.
In this case, since the inner diameter of the produced sleeve support (sleeve printing plate) is smaller than the outer diameter of the cylinder of the printing apparatus, the sleeve support (sleeve printing plate) is attached to the cylinder when mounted on the cylinder. It will be firmly fixed.

Further, it is preferable that the fixing base is provided with an adsorption mechanism, and the plastic sheet material is adsorbed and fixed.
In this case, since the plastic sheet material is fixed by being adsorbed by an adsorption mechanism provided on the fixing table, ultrasonic bonding or laser welding can be performed in a state where the plastic sheet material is securely adhered to the fixing table. In addition, the inner diameter of the sleeve support (sleeve printing plate) can be formed with high accuracy.

The plastic sheet material is preferably made of polyethylene terephthalate resin.
In this case, the sleeve printing plate can be provided at low cost by configuring the sleeve support with a general-purpose polyethylene terephthalate resin. Even if the sleeve printing plate is discarded after use, it can be used as a raw material for polyethylene terephthalate resin, and it is not necessary to excessively increase the strength of the sleeve support in order to extend the life of the sleeve printing plate.

Furthermore, a notch that is recessed in the circumferential direction in a state of being wound around the fixed base is formed at one end of the plastic sheet material, and the other end of the plastic sheet material is complementary to the notch. It is preferable that a projecting portion having a desired shape is formed, the notched portion and the projecting portion are abutted, and the abutted portion is fused by ultrasonic bonding or laser welding.
In this case, the abutting portion between one end portion and the other end portion of the plastic sheet material is lengthened, and the joining strength of the portion fused by ultrasonic joining or laser welding can be ensured.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the sleeve printing plate which can manufacture a sleeve printing plate efficiently and at low cost can be provided.

It is a perspective view of the sleeve printing plate manufactured by the manufacturing method of the sleeve printing plate which is embodiment of this invention. It is the figure which looked at the sleeve printing plate shown in FIG. 1 from the axial direction. It is a perspective view of the sleeve support body with which the sleeve printing plate of FIG. 1 was equipped. It is a flowchart which shows the manufacturing method of the sleeve printing plate which is embodiment of this invention. It is explanatory drawing of the cutting process of the manufacturing method of the sleeve printing plate which is embodiment of this invention. It is a perspective view of the plastic sheet material used for the manufacturing method of the sleeve printing plate which is embodiment of this invention. It is explanatory drawing of the fixed base used for the manufacturing method of the sleeve printing plate which is embodiment of this invention. It is explanatory drawing of the winding process of the manufacturing method of the sleeve printing plate which is embodiment of this invention. It is explanatory drawing of the fixing process of the manufacturing method of the sleeve printing plate which is embodiment of this invention. It is explanatory drawing of the joining process of the manufacturing method of the sleeve printing plate which is embodiment of this invention. It is the schematic of the offset printing apparatus in which the sleeve printing plate shown in FIG. 1 is used. FIG. 2 is a perspective view showing a plate cylinder on which the sleeve printing plate shown in FIG. 1 is mounted. It is explanatory drawing of the junction part of the sleeve printing plate manufactured by the manufacturing method of the sleeve printing plate which is other embodiment of this invention. It is explanatory drawing of the junction part of the sleeve printing plate manufactured by the manufacturing method of the sleeve printing plate which is other embodiment of this invention. It is explanatory drawing of the junction part of the sleeve printing plate manufactured by the manufacturing method of the sleeve printing plate which is other embodiment of this invention. It is explanatory drawing of the junction part of the sleeve printing plate manufactured by the manufacturing method of the sleeve printing plate which is other embodiment of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, the sleeve printing plate 30 manufactured by the manufacturing method of the sleeve printing plate which is this embodiment is demonstrated.
As shown in FIGS. 1 and 2, the sleeve printing plate 30 according to the present embodiment includes a cylindrical sleeve support 31 extending along the axis O, and a plate disposed on the outer peripheral side of the sleeve support 31. The material 32 is provided.

  The plate member 32 is made of, for example, a photosensitive resin that can be engraved with laser light, and has a cylindrical shape with a thickness of 0.5 mm to 1.0 mm. A relief plate 33 (plate body) having an image pattern is formed on the plate material 32 by etching or laser processing. In the present embodiment, the two relief plates 33 are disposed at positions facing each other with the axis O therebetween.

  The sleeve support 31 is made of polyethylene terephthalate (PET) resin, and has a thickness of 0.1 mm to 0.5 mm and an outer diameter of 180 mm to 300 mm. Here, the crystallinity of the polyethylene terephthalate resin is 20 to 40%. Further, the crystal orientation direction is configured to face the circumferential direction of the sleeve support 31.

As shown in FIG. 3, the sleeve support 31 is provided with a joining portion 35 at a part in the circumferential direction.
In the present embodiment, the joint portion 35 is formed in a straight line extending parallel to the axis O.
In the joint portion 35, no step is generated on the inner peripheral surface side, and the inner peripheral surface of the sleeve support 31 is a smooth cylindrical surface. On the other hand, slight unevenness (for example, about 0.7 μm) may be formed on the outer peripheral surface side of the joint portion 35.

  Further, as shown in FIGS. 1 and 2, the sleeve printing plate 30 is aligned with the cylinder 61 of the offset printing apparatus A, which will be described later, at a position facing the joining portion 35 across the axis O. The positioning notch 36 is formed. The above-described relief plates 33 and 33 are disposed between the joining portion 35 and the alignment notch 36 in the circumferential direction. In this embodiment, as shown in FIG. The relief plate 33 and the alignment notch 36 are arranged at 90 ° intervals, that is, the relief plates 33, 33, the joint portion 35 and the alignment notch 36 are arranged at equal intervals in the circumferential direction.

Next, the manufacturing method of the sleeve printing plate which is this embodiment is demonstrated with reference to FIGS.
As shown in FIG. 4, the method for manufacturing a sleeve printing plate according to the present embodiment includes a cutting step S1 for cutting a long plastic sheet material 45 to obtain a plastic sheet material 40 having a predetermined length, and a predetermined length. A winding step S2 for winding the plastic sheet material 40 around a fixing base 50 having a cylindrical surface 51, a fixing step S3 for fixing the wound plastic sheet material 40, one end 41 and the other of the fixed plastic sheet material 40 A joining step S4 for ultrasonically joining the end 42 of the plate, a plate forming step S5 for applying and curing a photosensitive resin to be the plate 32 on the outer peripheral surface of the formed sleeve support 31, and the plate 32. A relief plate forming step S6 for forming a relief plate 33 (plate body) by etching or laser processing.

  In the cutting step S1, as shown in FIG. 5, a long plastic sheet material 45 wound in a roll shape is unwound by a predetermined length, cut by an ultrasonic cutter 47, and polyethylene terephthalate (as shown in FIG. A plastic sheet material 40 made of (PET) resin is obtained. In the cutting step S1, it is required to accurately and stably cut the plastic sheet material 45 so that the length of the plastic sheet material 40 matches the circumferential length of the sleeve support 31 to be molded. It is done.

  As shown in FIG. 7, the fixed base 50 around which the cut plastic sheet material 40 is wound has a cylindrical surface 51, and a number of vacuum holes 52 are formed in the cylindrical surface 51. The vacuum hole 52 is connected to a suction device (not shown) having an exhaust pipe 53, and a suction mechanism for sucking and fixing the vacuum hole 53 and the suction device that are disposed on the cylindrical surface 51. It is composed. Further, the outer diameter of the cylindrical surface 51 of the fixed base 50 is set slightly smaller than the outer diameter of a cylinder 61 of the offset printing apparatus A described later. Specifically, the difference between the outer diameter of the cylindrical surface 51 of the fixed base 50 and the outer diameter of the cylinder 61 is set within a range of 100 μm to 800 μm.

  In the winding step S2, the plastic sheet material 40 is wound around the cylindrical surface 51 of the fixed table 50 described above. In the present embodiment, as shown in FIG. 8, the plastic sheet material 40 is pressed against the cylindrical surface 51 by the pressing roll 55 from the outer peripheral side of the fixed base 50 and is adsorbed from the vacuum hole 52 of the cylindrical surface 51. The sheet material 40 is brought into close contact with the cylindrical surface 51. Then, when the pressing roll 55 goes around the fixed base 50, the plastic sheet material 40 is wound in a state of being in close contact with the fixed base 50.

  In the fixing step S3, the wound plastic sheet material 40 is firmly fixed to the fixing base 50. The plastic sheet material 40 is fixed to the fixing base 50 by suction from the vacuum hole 52 described above. Further, as shown in FIG. 9, the vicinity of one end 41 and the vicinity of the other end 42 of the plastic sheet material 40 are pressed and fixed by the pressing bar 56 from the outer peripheral side of the fixing base 50. Thereby, it fixes in the state in which the one edge part 41 and the other edge part 42 of the plastic sheet material 40 were faced | matched.

  In the joining step S <b> 4, the butted portion between one end 41 and the other end 42 of the plastic sheet material 40 fixed to the fixing base 50 is ultrasonically joined. As shown in FIG. 10, an ultrasonic wave is applied by bringing the probe 57 of the ultrasonic oscillator 58 into contact with the butted portion. Then, one end 41 and the other end 42 of the plastic sheet material 40 are locally heated and welded by frictional heat generated by ultrasonic waves. Thereby, the sleeve support body 31 which has the junction part 35 is produced. In addition, it is preferable to set it as about 15-100 kHz as a frequency of the ultrasonic wave to provide. Here, in this embodiment, the fixed base 50 is made of a resonant material that resonates with the ultrasonic waves.

  In the plate material forming step S5, the sleeve support 31 obtained as described above is mounted on a holding member having a cylindrical surface, and a photosensitive resin to be the plate material 32 is applied to the outer peripheral surface of the sleeve support 31. To cure. As a result, the plate material 32 is integrally formed on the outer peripheral surface of the sleeve support 31. Further, an alignment notch 36 that opens to the end face is formed at a position of the sleeve support 31 on which the plate member 32 is disposed, facing the joint 35 with the axis O therebetween.

In the relief plate forming step S6, a relief plate 33 (plate body) having an image pattern is formed on the surface of the plate material 32 by etching or laser processing. In the present embodiment, as described above, the two relief plates 33 and 33 are disposed at positions facing each other across the axis O, and the relief plates 33 and 33 are connected to the joint portion 35 and the alignment notch portion 36. It adjusts so that it may each be located between. The relief plate 33 is formed so as to protrude outward in the radial direction from the portion of the plate member 32 disposed on the joint portion 35.
Thus, the sleeve printing plate 30 which is this embodiment is manufactured.

Next, the usage example of the sleeve printing plate 30 which is this embodiment is demonstrated. The sleeve printing plate 30 according to the present embodiment is used in a can printing apparatus (offset printing apparatus A) that performs printing on an outer peripheral surface of a cylindrical can. An outline of the offset printing apparatus A is shown in FIG.
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 including a relief plate 33 is disposed on the outer peripheral surface of the plate cylinder 60. The sleeve cylinder 60 includes a rubber roller 5 to be connected and a plate cylinder 60 connected to the rubber roller 5. A plurality of blankets 9 are provided on the outer peripheral surface of the blanket wheel 8, and the blanket 9 contacts the relief plate 33 of the sleeve printing plate 30 disposed on the outer peripheral surface of the plate cylinder 60, 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 attached to the mandrel 11. , And a mandrel turret 12 that rotates in the direction of the ink adhesion mechanism B.

  As shown in FIG. 12, the plate cylinder 60 has a cylindrical shape, and includes a cylinder 61 that is rotatably supported by the shaft portion 70 of the printing apparatus A in a cantilevered state. The sleeve printing plate 30 according to the present embodiment is fitted. Here, the inner diameter of the sleeve printing plate 30 and the outer diameter of the cylinder 61 are set to be substantially the same. A plurality of air holes 62 are formed on the outer peripheral surface of the cylinder 61, and air is supplied from an introduction hole 63 formed on the end surface of the cylinder 61 and ejected from the air hole 62, whereby the sleeve printing plate 30. The inner diameter is widened and the cylinder 61 is attached and detached. Here, an alignment pin 64 protrudes from the cylinder 61, and the alignment notch portion 36 of the sleeve printing plate 30 is engaged with the alignment pin 64, so that the sleeve printing plate 30 and the cylinder 61 are engaged with each other. A circumferential position and an axis O direction position are determined.

  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 on the mandrel 11. It is printed while contacting the can body 20.

  According to the manufacturing method of the sleeve printing plate which is the present embodiment having such a configuration, the cylindrical sleeve support is formed by joining one end 41 and the other end 42 of the plastic sheet material 40. 31 is formed, it is not necessary to repeat the steps of winding the reinforcing fiber around the fixed base, applying the molten plastic resin and curing it as in the prior art, and manufacturing the sleeve printing plate 30 at a low cost. be able to.

  In addition, since the portion where the one end portion 41 and the other end portion 42 of the plastic sheet material 40 are abutted is joined by ultrasonic bonding, only the abutted portion can be locally heated and fused. It becomes possible, and the thermal influence on other parts can be suppressed. In addition, since ultrasonic bonding is completed in a short time, the sleeve support 31 can be mass-produced, and the manufacturing cost of the sleeve printing plate 30 can be further reduced.

  Furthermore, in the present embodiment, since the plastic sheet material 40 is made of general-purpose polyethylene terephthalate (PET) resin, the sleeve printing plate 30 can be produced at low cost. Further, even if the sleeve printing plate 30 is discarded after use, it can be used as a raw material for the polyethylene terephthalate resin. There is no. In particular, in the present embodiment, the degree of crystallinity of the polyethylene terephthalate resin is 20 to 40%, and the orientation direction of the crystals faces the circumferential direction of the sleeve support 31, so that the sleeve support 31 is sufficient. Has high strength and is less likely to stretch. For this reason, there is no possibility that the image pattern formed on the relief printing plate of the sleeve printing plate 30 is deformed, and high-quality printing can be performed.

Further, in the present embodiment, since there is a cutting step S <b> 1 for cutting the long plastic sheet material 45 to obtain the plastic sheet material 40 having a predetermined length, the plastic sheet material 40 is fixed to the cylindrical surface 51 of the fixing base 50. When wound around, one end 41 and the other end 42 of the plastic sheet material 40 can be abutted with high precision. Therefore, the sleeve support 31 can be manufactured efficiently and with high dimensional accuracy.
Furthermore, in this embodiment, since the plastic sheet material 45 is cut by the ultrasonic cutter 47, the cut surface becomes smooth, and when one end 41 and the other end 42 of the plastic sheet material 40 are brought into contact with each other. The generation of gaps can be suppressed.

  In the present embodiment, a vacuum hole 52 is formed in the cylindrical surface 51 of the fixed base 50, and the vacuum hole 52 is connected to a suction mechanism (not shown) and disposed on the cylindrical surface 51. In the winding step S2, the plastic sheet material 40 is cylindrically pressed by pressing the plastic sheet material 40 against the cylindrical surface 51 from the outer peripheral side of the fixing table 50 in the winding step S2. The plastic sheet material 40 can be wound around the surface 51 without wrinkles or twisting.

  Further, in the fixing step S3, the plastic sheet material 40 is adsorbed and fixed, and one end 41 and the other end 42 of the plastic sheet material 40 are pressed by the pressing bar 56 from the outer peripheral side of the fixing base 50. Therefore, the plastic sheet material 40 can be fixed in a state in which the plastic sheet material 40 is securely adhered to the fixing base 50. Therefore, ultrasonic bonding can be performed in a state where the one end 41 and the other end 42 of the plastic sheet material 40 are abutted with each other with high accuracy, and the inner diameter of the sleeve support 31 can be formed with high accuracy.

  Furthermore, in this embodiment, since the fixing base 50 is made of a resonant material that resonates with ultrasonic waves, the outer side (the outer peripheral side of the plastic sheet material 40) of the plastic sheet material 40 wound around the fixing base 50 and fixed. When the ultrasonic wave is applied from this, the ultrasonic wave resonates in the fixed base 50, and the ultrasonic wave is also applied from the fixed base 50 side (the inner peripheral side of the plastic sheet material 40). Thereby, it becomes possible to join the plastic sheet material 40 efficiently. Moreover, the inner peripheral surface of the sleeve support 31 produced by joining can be finished to a smooth surface.

  In the present embodiment, the outer diameter of the cylindrical surface 51 of the fixed base 50 is set slightly smaller than the outer diameter of the cylinder 61 of the offset printing apparatus A to which the sleeve printing plate 30 is mounted. Since the difference between the outer diameter of the cylindrical surface 51 of the fixed base 50 and the outer diameter of the cylinder 61 is set within a range of 100 μm to 800 μm, the inner diameter of the sleeve printing plate 30 to be produced is the same as that of the offset printing apparatus A. It becomes smaller than the outer diameter of the cylinder 61. Therefore, when the sleeve printing plate 30 is mounted on the cylinder 61, the sleeve printing plate 30 is firmly fixed to the cylinder 61, and the position of the sleeve printing plate 30 is not shifted during printing, and high-quality printing is performed. It can be performed.

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, the sleeve support is described as being formed of polyethylene terephthalate (PET) resin. However, the sleeve support is not limited to this, and the sleeve support may be vinyl chloride (PVC), polyethylene (PE). ), Polyethylene naphthalate (PEN) or the like may be applied.

In the present embodiment, in the joining step S4, the butt portion between the one end portion 41 and the other end portion 42 of the plastic sheet material 40 fixed to the fixing base 50 has been described as being ultrasonically bonded. The joining method is not limited to ultrasonic joining, and any structure may be used as long as one end and the other end of the plastic sheet material are locally heated and fused.
More specifically, laser welding may be used in the joining step S4. In this case, for example, a laser absorbent is applied to one end and the other end, and these are abutted. Then, for example, a CO ₂ laser is irradiated to a butt portion between one end and the other end. Then, one end and the other end of the sheet material are locally heated and welded. In addition, it becomes possible to use a solid laser or a semiconductor laser that is easier to handle by selecting a laser absorber.

  In addition, the plate main body disposed on the outer peripheral surface of the sleeve support has been described as being provided by forming an image pattern on a cylindrical plate material, but the present invention is not limited to this, and a plate shape is provided. An image pattern may be formed on the printing plate and pasted on the outer peripheral surface of the sleeve support.

  In addition, although it has been described that the joint portion is linearly formed so as to extend along the axis O, the present invention is not limited to this, and the joint portion 135 is inclined with respect to the axis O as shown in FIG. May be provided. As shown in FIGS. 14 and 15, notches 243 and 343 that are recessed in the circumferential direction are formed in one end 241 and 341, and notches 243 and 343 are formed in the other ends 242 and 342. The protrusions 244 and 344 having a complementary shape may be formed, and the joints 235 and 335 may be formed in a state where the notches 243 and 343 are engaged with the protrusions 244 and 344. Further, as shown in FIG. 16, the joint portion 435 may be formed so as to cross obliquely in the thickness direction of the sleeve printing plate. In these cases, the length of the abutting portion between one end portion and the other end portion of the plastic sheet material is increased, and the bonding strength when ultrasonic bonding is performed can be ensured.

In the present embodiment, the entire fixing base has been described as being made of a resonant material that resonates with ultrasonic waves. However, the present invention is not limited to this, and a portion of the fixing base to be ultrasonically bonded (joining portion) ) May be formed of a resonance material only.
Furthermore, in the present embodiment, the long plastic sheet material wound in a roll shape in the cutting process has been described as being cut out by a predetermined length, but the present invention is not limited thereto, and the sheet-like long length is not limited thereto. The plastic sheet material may be cut.

30, 130, 230, 330, 430 Sleeve printing plate 31, 131, 231 Sleeve support 33, 133, 233 Letter plate (plate body)
35, 135, 235, 335, 435 Joint 40, 140, 240 Plastic sheet material 41, 141, 241, 341, 441 One end 42, 142, 242, 342, 442 The other end 45 Plastic sheet material 50 Fixed base 51 Cylindrical surface 243, 343 Notch 244, 344 Protrusion

Claims (7)

A sleeve support having a cylindrical shape and a plate body disposed on the outer peripheral surface of the sleeve support and having an image pattern printed on a printing material are used by being mounted on a cylinder of a printing apparatus. A method for producing a sleeve printing plate, comprising:
Winding a plastic sheet material around a fixed base having a cylindrical surface;
Fusing one end and the other end of the plastic sheet material wound around the fixed base by ultrasonic bonding or laser welding to obtain the sleeve support. A method for producing a sleeve printing plate characterized by the above. A portion of at least one end portion and the other end portion of the plastic sheet material of the fixing base is made of a resonance material that resonates with the ultrasonic wave,
2. The method for producing a sleeve printing plate according to claim 1, wherein one end portion and the other end portion of the plastic sheet material wound around the fixing base are fused by ultrasonic bonding.   The method for manufacturing a sleeve printing plate according to claim 1 or 2, further comprising a cutting step of cutting a long plastic sheet material to obtain the plastic sheet material having a predetermined length.   4. The outer diameter of the cylindrical surface of the fixed base is set to be smaller than the outer diameter of the cylinder to which the sleeve printing plate is mounted. 5. Manufacturing method for sleeve printing plates.   The method for manufacturing a sleeve printing plate according to any one of claims 1 to 4, wherein the fixing base is provided with an adsorption mechanism, and the plastic sheet material is adsorbed and fixed. .   The said plastic sheet material is comprised with the polyethylene terephthalate resin, The manufacturing method of the sleeve printing plate as described in any one of Claims 1-5 characterized by the above-mentioned. One end of the plastic sheet material is formed with a notch that is recessed in the circumferential direction in a state of being wound around the fixed base, and the other end of the plastic sheet material has a shape complementary to the notch. A protruding part is formed,
The sleeve printing plate according to any one of claims 1 to 6, wherein the notched portion and the projecting portion are abutted and the abutted portion is locally heated and fused. Method.

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