WO2020039578A1 - 印刷用ブランケット及び印刷用ブランケットの製造方法 - Google Patents
印刷用ブランケット及び印刷用ブランケットの製造方法 Download PDFInfo
- Publication number
- WO2020039578A1 WO2020039578A1 PCT/JP2018/031375 JP2018031375W WO2020039578A1 WO 2020039578 A1 WO2020039578 A1 WO 2020039578A1 JP 2018031375 W JP2018031375 W JP 2018031375W WO 2020039578 A1 WO2020039578 A1 WO 2020039578A1
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- WIPO (PCT)
- Prior art keywords
- elastic body
- sheet
- adhesive
- printing
- printing blanket
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
- B41N10/02—Blanket structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
- B41N10/02—Blanket structure
- B41N10/04—Blanket structure multi-layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
- B41F17/001—Pad printing apparatus or machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/06—Lithographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
- B41N2210/12—Location or type of the layers in multi-layer blankets or like coverings characterised by non-macromolecular organic compounds
Definitions
- the present invention relates to a printing blanket and a method for manufacturing a printing blanket, and more particularly, to a printing blanket and a method for manufacturing a printing blanket that can be repeatedly used by exchanging a structure including a portion for transferring ink.
- the printing surface of a printing blanket is pressed against a printing original plate, and the ink placed on the printing original plate in a pattern corresponding to the printing pattern is transferred to the printing blanket. Subsequently, the printing surface of the printing blanket to which the ink has been transferred is pressed against the printing surface, and the transferred ink is transferred to the printing surface, thereby printing a print pattern on the printing surface.
- the printing blanket is made of an elastic body such as silicone rubber mixed with silicone oil having elasticity (flexibility) and is formed in a substantially hemispherical or substantially semi-cylindrical shape. Then, the ink is transferred to the printing target surface by pressing the printing target onto a flat printing original plate or a curved printing target surface. For this reason, especially, the leading edge (the lowest point or the lowest line) of the printing blanket and its surroundings are pressed against the printing original plate, pressed against the printing surface, damaged by protrusions when pressed against the printing surface, or otherwise. Deterioration and damage occur in the step. This limited range of degradation or damage to the printing blanket renders the printing blanket unusable.
- the printing blanket in order for the printing blanket to conform to the surface to be printed, the printing blanket needs to be formed softly (having a small elastic coefficient and the same as easily deformable elastically). Then, when the printing surface of the printing blanket is pressed against the printing original plate and deformed, the silicone oil mixed in the printing blanket oozes out on the surface. At this time, the ink applied to the printing original plate is difficult to be transferred (hardly transferred) from the printing original plate to the printing blanket, and the print pattern printed on the printing surface is blurred or unclear.
- the silicone oil component that has oozed out of the elastic body of the printing blanket adheres to the printing surface.
- the coating is repelled by the silicone oil component. As a result, a desired coating layer is not formed on the printing surface.
- a printing blanket in which a printing surface is formed by attaching an elastic and exchangeable sheet to the surface of an elastic body formed of soft silicone rubber.
- the sheet portion can be replaced when the printing surface is deteriorated or damaged, and the oozing of the silicone oil from the soft silicone rubber can be suppressed.
- the periphery of a region of the sheet constituting the printing surface of the blanket, which is to be bonded to the elastic body, is fixed, and the bonding surface of the elastic body faces the bonding surface of the fixed sheet.
- the elastic body is installed as follows. Then, an adhesive is applied to at least one of the adhesive surface of the sheet and the adhesive surface of the elastic body, the adhesive surface of the sheet and the adhesive surface of the elastic body are pressed, and the sheet is adhered while being stretched along the surface of the elastic body. The sheet is brought into close contact with the elastic body via the agent. Thus, the sheet is stuck on the surface of the elastic body to constitute a printing blanket.
- the sheet adhered to the printing blanket is deteriorated or damaged, the sheet can be peeled off from the elastic body and a new sheet can be attached by the same process. Therefore, the printing blanket can use the elastic body repeatedly.
- the present invention has been made in order to solve the above-described problems, and facilitates peeling of a sheet attached to an elastic body during repair of a printing blanket, and can be used continuously for a long time by replacing the sheet.
- the present invention provides a printing blanket and a method of manufacturing the printing blanket.
- a method of manufacturing a printing blanket according to the present invention is a method of manufacturing a printing blanket that includes an elastic body and a sheet adhered to the elastic body, and presses the sheet against a printing surface to perform printing.
- a sheet fixing step of fixing a periphery of a region of the sheet to be bonded to the elastic body, and an elasticity of setting the elastic body such that the bonding surface of the elastic body faces the bonding surface of the fixed sheet.
- the printing blanket according to the present invention includes an elastic body, a wax layer covering the surface of the elastic body, an adhesive covering the wax layer, and a sheet covering the adhesive, and ink is applied to the surface of the sheet. It has a printing surface to be transferred.
- the sheet when a sheet serving as a printing surface of a printing blanket is attached, by providing a wax layer on the elastic body surface, the sheet can be attached in the same manner as in the related art, and at the time of renovating the printing blanket. Peeling of the sheet becomes easy.
- the thin sheet is attached to the surface of the printing blanket, and by making the sheet replaceable, damage to the elastic body, which is expensive to manufacture, is suppressed, so that the elastic body can be used repeatedly. Since the printing blanket can be used for a long period of time by replacing only inexpensive sheets, the printing cost can be reduced.
- FIG. 1 is a side view illustrating an example of a printing blanket according to Embodiment 1 of the present invention. It is sectional drawing of the printing blanket of FIG.
- FIG. 2 is a schematic diagram of a sheet sticking apparatus according to Embodiment 1.
- FIG. 4 is a schematic diagram illustrating a cross section taken along the line AA of the sheet sticking apparatus in FIG. 3.
- FIG. 4 is a diagram illustrating a cross section in a state where an adhesive is placed on the elastic body according to the first embodiment.
- FIG. 6 is a diagram showing a state in which the adhesive has flowed from the state of FIG.
- FIG. 5 is a diagram illustrating a state where an elastic body is pressed against a sheet from the state of FIG. 4.
- FIG. 7 is a perspective view of a printing blanket according to a second embodiment of the present invention.
- FIG. 9 is a sectional view perpendicular to the bottom surface of the printing blanket of FIG. 8.
- FIG. 9 is a sectional view perpendicular to the bottom surface of the printing blanket of FIG. 8.
- Embodiment 1 a printing blanket and a method of manufacturing the printing blanket according to the present invention will be described with reference to the drawings.
- the present invention is not limited by the embodiments described below.
- the same parts are denoted by the same reference numerals, and a part of the description will be omitted.
- each drawing is a schematic drawing, and the present invention is not limited to the illustrated shape (especially, the thickness of sheets, adhesives, and wax layers is exaggerated). ).
- the term “elastic body” or “elasticity” is not limited to an elastic body or an elastic body in which a load applied thereto and a deformation amount caused by the load have a linear relationship. The applied load and the amount of deformation caused by the load are in a non-linear relationship, and include those that return to the original shape immediately or after a predetermined time delay when the applied load is removed. .
- FIG. 1 is a side view illustrating an example of a printing blanket 10 according to Embodiment 1 of the present invention.
- the printing blanket 10 shown in FIG. 1 has, for example, a substantially hemispherical shape. Assuming that the substantially hemispherical flat portion is the bottom side and the bottom surface 12, the distance from the center of the bottom surface 12 to the vertex 11 is longer than that of a normal hemisphere having the same size of the bottom surface 12. That is, the printing blanket is shaped like a shell.
- the shape of the blanket is not limited to this.For example, a hemisphere, a curved surface formed by rotating a parabola around its axis of symmetry, a shape of a part obtained by cutting an ellipsoid, a shell shape or a semicircle shape are aligned on a straight line.
- the shape can be appropriately changed according to the specifications of the printing medium, such as a continuously elongated shape.
- a predetermined range centered on the vertex 11 of the surface of the printing blanket 10 becomes the printing surface 13 for transferring ink from the printing original plate and transferring the ink to the printing medium.
- FIG. 2 is a sectional view of the printing blanket 10 of FIG. A cross section passing through the top of the printing blanket 10 and perpendicular to the bottom surface 12 is shown.
- the printing blanket 10 includes an elastic body 1 and a sheet 2 attached along a curved surface of the elastic body 1.
- a wax layer 3 in contact with the surface of the elastic body 1 and an adhesive 4 disposed on the wax layer 3 are provided between the elastic body 1 and the sheet 2.
- the elastic body 1 is formed by molding, for example, silicone rubber.
- the elastic body 1 is mixed with silicone oil to impart elasticity (flexibility) and facilitate deformation.
- the elastic body 1 has a shell shape as in the case of the printing blanket 10, but the shape can be appropriately changed according to the specifications of the printing medium.
- the elastic body 1 may be deformed when the printing blanket 10 is pressed against the printing original plate (not shown), and may be any ink that can transfer the ink corresponding to the printing pattern applied to the printing original plate to the sheet 2.
- the elastic body 1 is made of a material (substance) that can transfer the transferred ink to the printing surface when the printing blanket 10 is pressed against the printing surface (not shown). It is not limited.
- the elastic body 1 may be formed from two materials having different hardnesses.
- the material constituting the portion on the printing surface side is set in the range of 50 to 70 points in Asker C hardness.
- the Asker C hardness of the material constituting the portion on the side to which the force for pressing the printing surface is applied at the time of printing is set to 100 points.
- the lower part of the elastic body 1 has an Asker C hardness of 10 points
- the upper part (vertex 11 side) of the elastic body 1 has an Asker C hardness of 5 to 7 points.
- the hardness of the elastic body 1 is desirably set low. Therefore, the hardness of the portion on the surface side pressed against the printing surface is set low.
- the hardness of each part of the elastic body 1 is not limited to the above hardness.
- the sheet 2 is made of a sheet-like silicon rubber having a predetermined thickness (for example, 0.5 mm).
- a silicon rubber having a higher hardness and a lower silicon oil content than the silicon rubber forming the elastic body 1 is employed.
- the material of the sheet 2 is not limited to this.
- the sheet 2 only needs to be able to transfer the ink corresponding to the print pattern applied to the printing original when the printing blanket 10 is pressed against the printing original (not shown).
- the sheet 2 only needs to be able to transfer the transferred ink to the printing surface when the printing blanket 10 is pressed against the printing surface (not shown).
- the sheet 2 only needs to have sufficient elasticity so that the sheet 2 can be attached along the surface of the elastic body 1.
- a wax layer 3 is disposed on the surface of the elastic body 1.
- the wax layer 3 is a soft solid at room temperature, and is made of wax that has a relatively high viscosity but can be applied to the surface of the elastic body 1.
- the wax may include, for example, carnauba wax and has water repellency.
- the wax layer 3 may be partially or entirely mixed with the adhesive 4 when the adhesive 4 is applied thereon. That is, a mixed layer of the adhesive 4 and the wax layer 3 may be formed on a part of the layer formed by the adhesive 4.
- the adhesive 4 is disposed on the wax layer 3.
- the adhesive 4 has such a viscosity as to flow downward along the surface of the wax layer 3 according to gravity when the wax layer 3 is placed on the surface of the elastic body 1 coated on the surface. .
- the adhesive 4 hardens when left to stand and adheres to the materials in contact with each other, but has such an elasticity that it deforms in accordance with the deformation of the elastic body 1 and the sheet 2.
- the printing blanket 10 is pressed from the vertex 11 to the printing original, deformed, and a predetermined region centered on the vertex 11 is pressed onto the printing original.
- the predetermined area is called a printing surface 13.
- ink on the printing original plate is transferred to the printing surface 13 of the printing blanket 10.
- the ink transferred to the printing surface 13 is transferred to the printing medium.
- the elastic body 1 is easily deformed because it is made of silicone rubber containing a large amount of silicone oil.
- the sheet 2 attached to the surface of the elastic body 1 is made of, for example, silicon rubber having a higher hardness than the elastic body 1, but follows the deformation of the elastic body 1 because it is a thin sheet.
- the material of the sheet 2 is not limited to silicon rubber having a higher hardness than the elastic body 1, and the hardness and the material can be appropriately selected as long as the sheet 2 follows the deformation of the elastic body 1.
- the wax layer 3 and the adhesive 4 disposed between the elastic body 1 and the sheet 2 are deformed according to the deformation of the elastic body 1 and the sheet 2.
- the wax layer 3 and the adhesive 4 are thinner than the sheet 2 and follow the deformation of the elastic body 1 even if the hardness is high.
- the printing blanket 10 is configured to be easily deformed as described above, the printing blanket 10 can easily follow a curved surface to be printed and has good familiarity.
- the sheet 2 is formed of silicon rubber having a higher hardness than the elastic body 1.
- the sheet 2 contains a smaller amount of silicone oil than the elastic body 1. Therefore, when the printing blanket 10 is deformed, the silicone oil mixed in the elastic body 1 is substantially sealed by the sheet 2 surrounding the same. Further, since the amount of the silicone oil mixed in the sheet 2 is small, the silicone oil does not easily seep out to the printing surface 13 formed by the sheet 2.
- the sheet 2 is formed of a material having a relatively high hardness and a relatively low thickness than the elastic body 1, the sheet 2 has high durability against scratches and the like. Therefore, the elastic body 1 provided with the sheet 2 on its surface has high durability as the printing blanket 10 and can withstand long-term use.
- the printing surface 13 is constituted by the single-layer sheet 2, but is not limited to this.
- Another sheet 2 may be provided on the sheet 2 in one or more layers.
- a wax layer 3 and an adhesive 4 are provided between the plurality of sheets 2.
- only the adhesive 4 may be provided between the plurality of sheets 2.
- the printing blanket has a triple structure or a multiple structure of four or more layers.
- the sheet 2 is configured to cover the entire surface of the printing blanket 10, but may be configured to partially cover the printing blanket 10.
- FIG. 3 is a schematic diagram of the sheet sticking device 20 according to the first embodiment.
- FIG. 4 is a schematic diagram showing a cross section taken along the line AA of the sheet sticking apparatus 20 of FIG.
- a method for manufacturing the printing blanket 10 will be described with reference to the drawings.
- the sheet 2 is fixed around an area to be bonded to the elastic body 1. This step is called a sheet fixing step.
- the sheet 2 is formed in a predetermined size (thickness, vertical length, and horizontal length). Even if the sheet 2 having the predetermined size is formed, a predetermined rectangular ( (Vertical length and horizontal length).
- the pedestal 21 to which the sheet 2 is fixed has a frame 22 for fixing the periphery of a region of the sheet 2 to be bonded to the elastic body 1 (hereinafter, referred to as a bonding region 2a).
- the sheet 2 may be fixed to the frame 22 around the entire circumference of the elastic body 1 and the bonding area 2a, or may be fixed to a plurality of fixing portions.
- the sheet 2 may be fixed by a pin, or a structure may be provided in the frame 22 so as to sandwich the sheet 2 in the thickness direction, and the sheet 2 may be sandwiched and fixed. As will be described later, the sheet 2 is pressed against the elastic body 1 upward from below the gantry 21.
- the part fixed around the bonding area 2a to the frame 22 of the sheet 2 is fixed so as not to move at that position.
- the sheet 2 is stretched and a tensile load is applied to the portion of the frame 22 to which the sheet 2 is fixed by the elastic force of the sheet 2, the sheet 2 is prevented from coming off.
- the frame 22 surrounds the bonding area 2a in a square shape in FIG. 3, the shape is not limited to this. For example, it may be circular. It can be appropriately changed according to the fixing method of the sheet 2 and the shape of the elastic body 1.
- the elastic body 1 is formed in a shell shape.
- the bottom surface 12 is placed on the upper surface of the lifter 30.
- This step is called an elastic body setting step.
- the elastic body 1 is installed at a lower portion of the gantry 21 to which the sheet 2 is fixed.
- the bonding surface 1a of the elastic body 1 to which the sheet 2 is bonded is installed to face the bonding surface 2b of the sheet 2.
- the apex of the shell shape of the elastic body 1 is set so as to be located substantially at the center of the bonding area 2a of the sheet 2.
- the lifter 30 is placed on the bottom surface 23 of the frame-shaped pedestal 21 so that the distance from the bottom surface 23 to the frame 22 does not change even if the sheet 2 is pushed upward in a pressing step described later. .
- FIG. 5 is a diagram illustrating a cross section in a state where the adhesive 4 is placed on the elastic body 1 according to the first embodiment.
- FIG. 6 is a diagram showing a state in which the adhesive 4 has flowed from the state of FIG.
- the cross section in FIG. 5 is perpendicular to the bonding surface 2b of the sheet 2 and passes through the vertex 1b of the elastic body 1.
- the wax layer 3 is thinly applied on the surface of the elastic body 1.
- the wax constituting the wax layer 3 has such a viscosity that the wax does not flow on the surface of the substantially hemispherical elastic body 1.
- the wax layer 3 is spread and applied so as to be substantially uniform over the entire surface of the elastic body 1. Further, in providing the wax layer 3, the coating operation may be repeated a plurality of times. Further, the coating operation may be repeated a plurality of times on only a part of the surface of the elastic body 1 including the apex 1b of the elastic body 1. Since the wax layer 3 is thickened by repeating the coating operation a plurality of times, the wax layer 3 can be thickened only in a part of the surface including the apex 1b of the elastic body 1. The above process is called a wax layer application process.
- the vertex 1b of the elastic body 1 Since the vertex 1b of the elastic body 1 is a portion that first comes into contact with the sheet 2 in a pressing step described later, the greatest force is applied from the sheet 2 due to the elasticity of the sheet 2.
- the thickness of the wax layer 3 By increasing the thickness of the wax layer 3 only on a part of the surface including the apex 1b of the elastic body 1, it is possible to prevent the wax layer 3 at the apex 1b from being extremely thin in a pressing step described later. In the pressing step, the force applied from the sheet 2 to the region around the vertex 1b of the elastic body 1 is large. Can be suppressed.
- the vertex 1b of the elastic body 1 corresponds to the “top” of the present invention.
- the wax can be applied manually using a sponge or the like, or can be applied by spraying with a spray.
- the application method and tools used for application are not limited to the above.
- the adhesive 4 is placed near the vertex 1 b of the elastic body 1.
- the placed adhesive 4 flows downward along the surface of the elastic body 1 due to gravity, that is, flows in the direction of the arrow in FIG. Thereby, as shown in FIG. 6, the adhesive 4 spreads thinly on the bonding surface 1 a of the elastic body 1.
- This step is called an adhesive application step.
- the adhesive 4 does not necessarily have to spread thinly on the surface of the elastic body 1 as in the state shown in FIG. 5, and if the viscosity of the adhesive 4 is high (hard), the adhesive 4 does not spread in the state shown in FIG. However, the sheet 2 can be attached. In the step of pressing the elastic body 1 against the sheet 2, which will be described later, by setting the speed at which the elastic body 1 is pressed against the sheet 2 to be slow, the adhesive 4 can be gradually spread downward from the vertex 1 b, and This is because the same effect as spreading the adhesive 4 can be obtained.
- the adhesive 4 removes air bubbles mixed before the adhesive applying step.
- This step is called a defoaming step. By going through this step, bubbles entering between the sheet 2 and the elastic body 1 can be further suppressed.
- FIG. 7 is a diagram showing a state in which the elastic body 1 is pressed against the sheet 2 from the state shown in FIG.
- the lifter 30 is configured to be able to expand and contract vertically, and is a moving unit that can move the elastic body 1 in the vertical direction. This step is called a moving step.
- the adhesive surface 1a of the elastic body 1 to which the adhesive 4 has been applied is pressed against the adhesive surface 2b of the sheet 2 by the lifter 30. Since the sheet 2 against which the elastic body 1 is pressed has elasticity, the sheet 2 adheres along the shape of the surface of the elastic body 1 while extending upward as the elastic body 1 moves upward. While the sheet 2 adheres closely to the shape of the elastic body 1, the adhesive 4 applied to the bonding surface 1 a is crushed by the elastic body 1 and the sheet 2 by pushing up the elastic body 1, 1 spreads further thinly on the surface of 1.
- the vertex 1b of the elastic body 1 comes into contact with the sheet 2 (point contact), and then, as the pressing progresses, the sheet 2 is deformed, and the contact position gradually moves in a direction away from the vertex 1b. , The contact area increases. Therefore, it is possible to prevent the air from being caught in the contact surface between the sheet 2 and the elastic body 1.
- the sheet 2 is sufficiently adhered to the bonding surface 1a of the elastic body 1 via the adhesive 4.
- the above process is called a pressing process.
- the moving step is included in the pressing step.
- the speed at which the elastic body 1 is moved upward is a speed at which no air bubbles enter between the sheet 2 and the adhesive 4.
- This speed may be appropriately set according to the amount of the adhesive 4, the viscosity of the adhesive 4, the viscosity of the wax layer 3, the hardness of the material of the sheet 2, the hardness of the elastic body 1, and the like.
- ⁇ Sheet 2 holding process> When the sheet 2 is sufficiently adhered to the adhesive surface 1a of the elastic body 1 via the adhesive 4, a process is performed to maintain the adhered state.
- the sheet sticking device 20 is held as it is.
- the method is not limited to the method of holding the sheet sticking device 20 as it is.
- a unit such as an adhesive tape may be used instead of the push pin for fixing the sheet 2.
- the above process is called a sheet holding process.
- the printing surface 13 (the surface on which the ink is transferred from the printing original plate, and the ink is transferred by pressing the printing blanket onto the printing surface) is deteriorated and damaged by repeating the printing.
- a new sheet 2 can be replaced with the elastic body 1 from which the deteriorated sheet 2 has been peeled off.
- the step of peeling the sheet 2 from the printing blanket 10 is called a removing step.
- the elastic body 1 can be used repeatedly while exchanging the sheet 2, and good printing can be continued at low cost.
- the adhesive 4 and the elastic body 1 are not directly bonded to each other, so that the sheet 2 is easily peeled off.
- the adhesive 4 and the sheet 2 are collectively peeled from the surface of the elastic body 1. Since the wax layer 3 is provided between the surface of the elastic body 1 and the adhesive 4, the adhesive 4 and the surface of the elastic body 1 are not directly bonded, and the sheet 2 and the adhesive 4 are peeled off. In this case, the surface of the elastic body 1 is not damaged.
- the positional relationship between the elastic body 1 and the sheet 2 is not limited to the positional relationship in the first embodiment, and may be, for example, upside down. Further, the positional relationship between the elastic body 1 and the sheet 2 can be appropriately set according to the shape of the elastic body 1 and the portion where the sheet 2 is attached. For example, when the elastic body 1 is pressed from above, the sheet 2 is fixed to, for example, the gantry 21, and the adhesive 4 is placed on the sheet 2.
- the adhesive 4 is placed on a region including the position where the sheet 2 and the vertex 1b of the elastic body 1 are in contact with each other, and the elastic body 1 provided with the wax layer 3 on the surface from above is pressed thereon.
- the elastic body 1 is attached to a device that moves up and down, such as a hand press, installed above the gantry 21 so as to be able to move up and down.
- a device that moves up and down such as a hand press, installed above the gantry 21 so as to be able to move up and down.
- the sheet 2 extends downward with its periphery fixed.
- the adhesive 4 is also spread out and spreads along the shape of the elastic body 1.
- the adhesive 4 spreads thinly between the sheet 2 and the elastic body 1 while the sheet 2 stretches and adheres closely to the shape of the elastic body 1, so that the elastic body 1 is pressed from below the sheet 2. The same effect can be obtained.
- the lifter 30 is configured to be able to move up and down a platform on which the elastic body 1 is mounted by a link, but is not limited to this configuration.
- a jack, a hand press, or the like may be used as long as it is configured to directly move and guide vertically.
- the power for driving the lifter 30 and the like up and down may be electric or manual, and is not particularly limited as long as it can be moved at a predetermined speed.
- the elastic body 1 is moved upward by the lifter 30, but the frame 22 to which the sheet 2 is fixed is moved in the direction of the elastic body 1 so that the bonding surface 1a of the elastic body 1 is moved.
- the sheet 2 may be moved in the direction of the elastic body 1 by moving the gantry 21 provided with the frame 22 up and down. Note that the sheet 2 can also be manually attached to the surface of the elastic body 1 without using a device such as the lifter 30.
- the manufacturing method of the printing blanket 10 according to the first embodiment includes an elastic body 1 and a sheet 2 bonded to a surface of the elastic body 1, and performs printing by pressing the surface of the sheet 2 against a surface to be printed.
- Step, the bonding surface 2b of the sheet 2 and the bonding surface 1a of the elastic body 1 are pressed, and the sheet 2 is adhered to the elastic body 1 via the adhesive 4 while stretching the sheet 2 along the surface of the elastic body 1. Pressing step.
- the sheet 2 can be attached to the surface of the elastic body 1 on which the wax layer 3 is provided, while suppressing air bubbles from entering between the elastic body 1 and the sheet 2.
- the sheet 2 and the adhesive 4 are attached to the elastic body 1 via the wax layer 3, when the sheet 2 needs to be replaced due to damage or deterioration of the sheet 2, the sheet 2 and the adhesive 4 are removed from the elastic body 1. 1 can be easily peeled off. Thereby, only the sheet 2 can be replaced without damaging the surface of the elastic body 1, and the elastic body 1 can be used for a long time.
- the elastic body 1 since the elastic body 1 is formed of a material having low hardness, the surface may be damaged when the sheet 2 is peeled off. Therefore, the elastic body 1 may be damaged by providing the configuration according to the first embodiment. Is suppressed.
- the wax application step includes a first wax application step of applying wax to the entire surface of the elastic body 1 and a second wax application step of applying wax only to a partial area of the surface including the vertex 1b of the elastic body 1. And a step.
- the thickness of the wax layer 3 in a part of the surface of the elastic body 1 including the apex 1b can be increased. Therefore, even in the pressing step of pressing the sheet 2 against the elastic body 1, the wax layer 3 around the apex 1 b of the elastic body 1 is pushed away by the pressing force of the sheet 2 to prevent the wax layer 3 from becoming extremely thin. be able to.
- the sheet 2 and the adhesive 4 of the printing blanket 10 are peeled off from the elastic body 1, it is possible to suppress the sheet 2 and the adhesive 4 from being hardly peeled off only at the periphery of the vertex 1 b of the elastic body 1. .
- the sheet 2 is fixed by the frame 22, and a large force is applied around the vertex 1 b of the elastic body 1.
- the apex 1b receives a greater force, so that the wax layer 3 in the region around the apex 1b also receives a large force and is compressed and pushed away. May be Therefore, the second wax application step may be repeated a plurality of times.
- the adhesive 4 is placed on the elastic body 1 having the wax layer 3 and the adhesive 4 is applied on the wax layer 3. Therefore, the wax layer 3 can easily maintain a state applied to the surface of the elastic body 1 during the wax application step.
- the adhesive 4 can be spread by flowing the adhesive 4 in the direction in which gravity acts.
- the adhesive 4 is pressed by pressing the elastic body 1 against the sheet 2. 1 can be spread over the surface.
- the wax layer 3 may be spread at the same time by the tool, and the thickness distribution of the wax layer 3 at the time of the wax application step may change.
- the adhesive 4 can be applied without changing the thickness distribution of the wax layer 3 as much as possible.
- the step of applying the adhesive 4 is not limited to the above method.
- Embodiment 2 The printing blanket 210 according to the second embodiment is different from the printing blanket 10 according to the first embodiment in that the shape of the elastic body 1 is changed. Therefore, the shape of the printing blanket 210 is different from the shape of the printing blanket 10, and the area to which the sheet 2 is attached is also different. In the second embodiment, the description will be focused on the changes from the first embodiment.
- FIG. 8 is a perspective view of a printing blanket 210 according to Embodiment 2 of the present invention.
- 9 and 10 are cross-sectional views perpendicular to the bottom surface 12 of the printing blanket 210 of FIG.
- the printing blanket 210 shown in FIG. 8 includes an elastic body 201 having a concave portion 209 at the center.
- the ridge line 211 surrounding the periphery of the concave portion 209 is a portion that first comes into contact when pressed against the printing original plate and the printing medium to be printed.
- the printing blanket 210 is pressed against the printing original plate on which the ink is placed, and transfers the ink to the printing surface 213 on the surface of the printing blanket 210.
- the printing is performed by pressing the printing surface 213 against the printing medium to transfer the ink to the printing medium.
- the printing blanket 210 has a substantially rectangular shape when viewed from the direction in which the printing original plate and the printing medium are arranged on the printing apparatus, that is, from below in FIG. 9 or FIG.
- the printing blanket 210 has a recess 209 at the center.
- the recess 209 is formed so as to be surrounded by a protrusion 218 formed on the leading end side of the printing blanket 210.
- the protruding portion 218 protrudes downward from the bottom surface 12 side. That is, when the cross-sectional shape of the protrusion 218 shown in FIGS. 9 and 10 is continuously arranged along a closed line connecting the start point and the end point, the portion surrounded by the protrusion 218 becomes the recess 209. Become.
- the ridgeline 211 serving as the vertex 1b in the cross section of the protruding portion 218 is formed round.
- the curvature of the ridgeline 211 is appropriately changed in accordance with the shape of the curved surface or the like of the printing medium.
- the ridgeline 211 is not limited to a rounded shape having a predetermined curvature, and may be a shape in which planes are combined by the ridgeline 211 or a shape in which a plane and a curved surface are combined by the ridgeline 211.
- the corner portion 16 of the printing blanket 210 which is substantially rectangular when viewed from below, is formed with a rounded shape.
- the roundness of the corner 16 is also appropriately changed according to the shape of the printing medium.
- FIGS. 9 and 10 show examples of the cross-sectional shape of the printing blanket 210.
- the shape of the elastic body 201 is changed from that of the printing blanket 10.
- the shape of the elastic body 201 is formed according to the shape of the printing blanket 210, and the printing blanket 210 is formed by covering the elastic body 201 with the wax layer 3, the adhesive 4, and the sheet 2.
- the printing blanket 210 may be configured by attaching two or more sheets 2.
- the printing blankets 210a and 210b shown in FIGS. 9 and 10 are different from the first embodiment in that the protruding portion 218 surrounds the central concave portion 209, so that the sheet 2 is attached along the protruding portion 218. Can be Therefore, the wax layer 3 is applied to the surface of the protrusion 218 to which the sheet 2 is attached.
- the printing blankets 210a and 210b may be formed by applying the wax a plurality of times to only a part of the surface including the ridgeline 201b, which is the top of the elastic body 201, to increase the thickness of the wax layer 3.
- the ridgeline 201b of the elastic body 201 corresponds to the "top" of the present invention.
- the sheet 2 and the adhesive 4 are attached to the elastic body 1 via the wax layer 3 even if the printing blanket 210 has a shape like the printing blanket 210 according to the second embodiment. Therefore, when it is necessary to replace the sheet 2 due to damage or deterioration of the sheet 2, the sheet 2 and the adhesive 4 can be easily separated from the surface of the elastic body 201. Thereby, only the sheet 2 can be replaced without damaging the surface of the elastic body 201, and the elastic body 1 can be used for a long time.
- the sheet 2 may be fixed to the recess 209 with a push pin or the like, and the sheet 2 may be adhered to the printing blanket 210a. At this time, the sheet 2 fixed to the concave portion 209 may be left in the concave portion 209 without being cut.
- 1 elastic body 1a adhesive surface, 1b vertex, 2 sheet, 2a adhesive region, 2b adhesive surface, 3 wax layer, 4 adhesive, 10 blanket for printing, 11 vertex, 12 base, 13 print surface, 16 corner, 20 Sheet sticking device, 21 ⁇ stand, 22 frame, 23 bottom, 30 lifter, 201 elastic, 201b ridge, 209 recess, 210 printing blanket, 210a printing blanket, 210b printing blanket, 211 ridge, 213 printing surface, 218 Projection.
Landscapes
- Printing Plates And Materials Therefor (AREA)
Abstract
Description
以下、本発明に係る印刷用ブランケット、及び印刷用ブランケットの製造方法について、図面を参照しながら説明する。なお、以下に説明する実施の形態によって本発明が限定されるものではない。また、各図において同じ部分には同じ符号を付し、一部の説明を省略する。また、各図は模式的に描かれたものであって、本発明は図示された形状に限定されるものではない(特に、シート、接着剤、及びワックス層については厚さを誇張している)。また、本明細書において、弾性体又は弾性とは、これに加わる荷重と該荷重によって生じる変形量とが直線的な関係にあるものに限定するものではない。加わる荷重と該荷重によって生じる変形量とが非直線的な関係であって、加わっていた荷重が除かれた場合に、即時又は所定の時間遅れの後に、元の形状に戻るものを含んでいる。
図1は、本発明の実施の形態1に係る印刷用ブランケット10の一例を表した側面図である。図1に示された印刷用ブランケット10は、例えば略半球形状である。略半球形状の平面部を下側にして底面12としたときに、底面12の中心から頂点11までの距離は、同じ大きさの底面12を持つ通常の半球よりも長くなっている。つまり、印刷用ブランケットは、砲弾の様な形状になっている。なお、ブランケットの形状はこれに限定されず、例えば、半球、放物線をその対称軸周りに回転させてできる曲面、楕円体を切断した一部等の形状、砲弾形状又は半円形状を一直線上に連続的に伸ばした形状など、被印刷体の仕様等に応じて適宜形状を変更できる。実施の形態1においては、印刷用ブランケット10の表面のうち、頂点11を中心とした所定の範囲が、印刷原版からインクを移し取り、被印刷体に転写する印刷面13となる。
弾性体1は、例えばシリコンゴムを成形して構成される。弾性体1は、弾性(可撓性)を付与し、変形しやすくするためにシリコンオイルが混合されている。実施の形態1においては、弾性体1は、印刷用ブランケット10と同じように、砲弾形状になっているが、被印刷体の仕様等に応じて適宜形状を変更することができる。なお、弾性体1は、印刷用ブランケット10が印刷原版(図示しない)に押し付けられた際に変形し、印刷原版に塗布された印刷パターンに対応したインクをシート2に移し取ることができればよい。また、弾性体1は、印刷用ブランケット10が被印刷面(図示しない)に押し付けられた際、移し取ったインクを被印刷面に移し渡すことができるものであれば、その材料(物質)を限定するものではない。
シート2は、所定の厚さ(例えば、0.5mm)のシート状のシリコンゴムから構成される。実施の形態1においては、例えば弾性体1を構成するシリコンゴムよりも硬度が高く、シリコンオイルの含有量が少ないシリコンゴムを採用している。ただし、シート2の材質はこれに限定されない。シート2は、印刷用ブランケット10が印刷原版(図示しない)に押し付けられた際、印刷原版に塗布された印刷パターンに対応したインクを移し取ることができればよい。また、シート2は、印刷用ブランケット10が被印刷面(図示しない)に押し付けられた際、移し取ったインクを被印刷面に移し渡すことができるものであればよい。さらに、後述するシート2を弾性体1に貼り付ける工程において、シート2は、弾性体1の表面に沿って貼り付けられるように、十分な伸縮性を有していれば良い。
弾性体1の表面にはワックス層3が配置されている。ワックス層3は、室温においては軟らかい固体であり、粘性が比較的高いが弾性体1の表面に塗布することが可能なワックスにより構成される。ワックスは、例えばカルナバ蝋が含まれていても良く、撥水性を有する。ワックス層3は、接着剤4が上に塗布された際に一部又は全部が接着剤4に混合する場合がある。すなわち、接着剤4が形成する層の一部に接着剤4とワックス層3との混合層が形成される場合がある。
接着剤4は、ワックス層3の上に配置される。接着剤4は、ワックス層3が表面に塗布された弾性体1の表面上に載せられた際に、重力に従いワックス層3の表面に沿って下方向に流動する程度の粘性を有するものである。接着剤4は、放置すると硬化し、接した材料を接着するが、弾性体1及びシート2の変形に従い変形する程度の弾性をもつ。
実施の形態1において、印刷用ブランケット10は、頂点11から印刷原版に押し付けられ、変形し、頂点11を中心とする所定の領域が印刷原版上に押し付けられる。その所定の領域を印刷面13と称する。印刷原版上にある、例えばインクが印刷用ブランケット10の印刷面13に転写される。その後、被印刷体に印刷面13を押し付けると、印刷面13に転写されたインクは、被印刷体に転写される。弾性体1は、シリコンオイルを多く含有するシリコンゴムから構成されているため容易に変形する。一方、弾性体1の表面に貼り付けられたシート2は、例えば、弾性体1よりも硬度が高いシリコンゴムで構成されているが、薄いシート状であるため、弾性体1の変形に追従する。ただし、シート2の材質については弾性体1よりも硬度が高いシリコンゴムのみに限定するものでは無く、弾性体1の変形に追従するものであれば、硬度及び材質は適宜選択することができる。
図3は、実施の形態1に係るシート貼り付け装置20の模式図である。図4は、図3のシート貼り付け装置20のA-A断面を表した模式図である。以下、図面を基に印刷用ブランケット10の製造方法について説明する。
シート2は、弾性体1に接着される領域の周囲を固定される。この工程をシート固定工程と呼ぶ。シート2は、所定の大きさ(厚さ、縦長さ及び横長さ)に形成されたものであり、所定の大きさのシート2を成形しても、広い面積の元シートから、所定の矩形(縦長さ及び横長さ)に切断してもよい。
実施の形態1において、弾性体1は砲弾形状に成形されている。その底面12を、リフター30の上面に載せる。この工程を弾性体設置工程と呼ぶ。弾性体1は、架台21のシート2が固定される下部に設置される。弾性体1のシート2を接着する接着面1aは、シート2の接着面2bに対向して設置される。また、弾性体1の砲弾形状の頂点は、シート2の接着領域2aの略中央に来るように設置される。
図5は、実施の形態1の弾性体1に接着剤4を載せた状態の断面を表した図である。図6は、図5の状態から接着剤4が流動した状態の図である。図5の断面は、シート2の接着面2bに垂直であり、弾性体1の頂点1bを通る面である。ワックス層3は、弾性体1の表面に薄く塗布される。ワックス層3を構成するワックスは、略半球形状の弾性体1の表面において流動しない程度の粘性を有する。ワックス層3は、作業者によりワックスを弾性体1の表面に載せた後、弾性体1の表面全域にわたり略均一になるように広げられ塗布される。また、ワックス層3を設けるにあたり、複数回塗布作業を繰り返しても良い。さらに、弾性体1の頂点1bを含む弾性体1の表面の一部のみに複数回塗布作業を繰り返しても良い。複数回塗布作業を繰り返すことにより、ワックス層3が厚くなるため、弾性体1の頂点1bを含む表面の一部の領域のみワックス層3を厚くすることができる。以上の工程をワックス層塗布工程と呼ぶ。弾性体1の頂点1bは、後述の押し付け工程において、シート2と最初に接触する部位であるため、シート2の弾性によりシート2から最も大きな力が加わる。弾性体1の頂点1bを含む表面の一部のみワックス層3を厚くすることにより、後述する押し付け工程において、頂点1bのワックス層3のみが極端に薄くなってしまうのを抑制することができる。押し付け工程においては、シート2から弾性体1の頂点1bの周辺の領域に加わる力が大きいが、ワックス層3が周辺よりも厚くすることにより、ワックス層3が加わる力により極端に薄くなることを抑制できる。なお、弾性体1の頂点1bは、本発明の「頂部」に相当する。ワックスの塗布は、スポンジ等を用いて手作業で塗布することもできるし、スプレーにより吹き付けて塗布することも出来る。塗布方法、塗布に使用される道具については上記のみに限定されるものではない。
接着剤4は、弾性体1の頂点1b付近に載せられる。載せられた接着剤4は、重力により、弾性体1の表面に沿って下方向、つまり図5中の矢印の方向に流動する。これにより、図6に示される様に、接着剤4は、弾性体1の接着面1aに薄く広がる。重力により接着剤4を広げることにより、弾性体1の表面にむら無く広げることができ、接着剤4に気泡が混入するなどの弊害が少ないという利点がある。この工程を接着剤塗布工程と呼ぶ。
図7は、図4の状態から弾性体1をシート2に押し付けた状態の図である。リフター30は、上下に伸縮できるように構成されており、弾性体1を上下方向に移動させることができる移動手段である。この工程を移動工程と呼ぶ。接着剤4が塗布された弾性体1の接着面1aは、リフター30により、シート2の接着面2bに押し付けられる。弾性体1が押し付けられたシート2は、伸縮性があるため、弾性体1が上に移動するに従い上方向に伸びながら、弾性体1の表面の形状に沿って密着する。弾性体1の形状に沿ってシート2が密着するとともに、接着面1aに塗布されている接着剤4は、弾性体1が押し上げられることにより、弾性体1とシート2とにより押しつぶされ、弾性体1の表面上をさらに薄く広がっていく。
弾性体1の接着面1aに、接着剤4を介して十分にシート2が密着したら、その密着状態を保持するように処理される。例えば、シート貼り付け装置20をそのままの状態で保持する。なお、弾性体1の接着面1aに接着剤4を介してシート2を密着状態で保持するにあたっては、シート貼り付け装置20をそのままの状態で保持する方法に限るものではない。例えば、シート2を押しピン等で固定することによりシート2が弾性体1の接着面1aに密着した状態で保持できるようにしてから、シート貼り付け装置20からシート2を密着させた弾性体1を外し、接着剤4が固まるまで放置してもよい。また、シート2を固定する押しピンの代わりに例えば粘着テープ等の手段を用いても良い。以上の工程を、シート保持工程と呼ぶ。
印刷用ブランケット10は、印刷を繰り返すことにより、印刷面13(印刷原版からインクを転写し、さらに被印刷面に押し当ててインクを移す面)が劣化、損傷する。上記の一連の印刷用ブランケット10の製造方法により、劣化したシート2を剥がした後の弾性体1に、新しいシート2を貼り替えることができる。印刷用ブランケット10からシート2を剥がす工程を除去工程と呼ぶ。これにより、シート2を交換しながら弾性体1を繰り返し使用することができ、良好な印刷を安価に継続することが可能になる。実施の形態1においては、弾性体1の表面にワックス層3が設けられているため、接着剤4と弾性体1とが直接的に接着されていないため、シート2が剥がしやすくなっている。シート2を剥がす作業においては、接着剤4とシート2とをまとめて弾性体1の表面から剥がすようにする。弾性体1の表面と接着剤4との間にはワックス層3が設けられているため、接着剤4と弾性体1の表面とは直接接着されておらず、シート2及び接着剤4を剥がした際に弾性体1の表面を損傷させることがない。
なお、上記の印刷用ブランケット10の製造方法において、弾性体1とシート2との位置関係は、実施の形態1の位置関係のみに限定されず、例えば、上下が反転していても良い。また、弾性体1の形状、シート2の貼り付け部位などに応じて、弾性体1とシート2の位置関係は適宜設定することができる。例えば、弾性体1を上から押し付ける場合は、シート2は、例えば架台21に固定され、接着剤4は、シート2上に載せられる。シート2と弾性体1の頂点1bとが接触する位置を含む領域に接着剤4を載置し、そこに上から表面にワックス層3が設けられた弾性体1を押し付ける。弾性体1は、架台21の上方に設置された、例えばハンドプレス等の上下直動する装置に取り付けられ、上下に移動できるようにする。弾性体1が下方向に移動しシート2に押し当てられることにより、シート2は周囲が固定されたまま下方向に伸びる。シート2が伸びるとともに接着剤4も押し広げられ、弾性体1の形状に沿って広がっていく。これにより、接着剤4はシート2と弾性体1との間に薄く拡がりながら、シート2が伸び弾性体1の形状に沿って密着されるため、弾性体1がシート2の下方から押し付けられる場合と同様の効果が得られる。
また、図7において、リフター30は、弾性体1を載置する台をリンクにより上下できるように構成されているが、この構成に限定されない。例えば、ジャッキ、ハンドプレスなどの直動して上下に案内する構成であれば良い。リフター30等を上下に駆動する動力は、電動又は手動でも良く、所定の速度で移動させることができれば特に限定されない。さらには、実施の形態1においては、リフター30により弾性体1を上に動かしているが、シート2が固定されている枠22を弾性体1の方向へ動かして、弾性体1の接着面1aをシート2の接着面2bに押し付けても良い。又は、枠22が備えられている架台21ごと上下に動かしてシート2を弾性体1の方向へ動かしても良い。なお、リフター30等の装置を使用せずに手作業によりシート2を弾性体1の表面に貼り付けることもできる。
実施の形態1に係る印刷用ブランケット10の製造方法は、弾性体1と、弾性体1の表面に接着されたシート2と、を有し、シート2の表面を被印刷面に押し当てて印刷する印刷用ブランケット10の製造方法である。シート2の弾性体1に接着される領域の周囲を固定するシート固定工程と、固定されたシート2の接着面2bに弾性体1の接着面1aが対向するように弾性体1を設置する弾性体設置工程と、弾性体1の表面にワックス層3を塗布するワック塗布工程と、シート2の接着面2b及び弾性体1の接着面1aのうち少なくとも一方に接着剤4を塗布する接着剤塗布工程と、シート2の接着面2bと弾性体1の接着面1aとを押し付け、シート2を弾性体1の表面に沿うように伸ばしながら接着剤4を介してシート2を弾性体1に密着させる押し付け工程と、を有する。このように構成することにより、弾性体1とシート2との間への気泡の入り込みを抑えつつ、シート2をワックス層3が設けられた弾性体1の表面に取り付けることができる。シート2及び接着剤4は、ワックス層3を介して弾性体1に取り付けられるため、シート2の損傷又は劣化などによりシート2を交換する必要がある場合に、シート2及び接着剤4を弾性体1の表面から容易に剥離させることができる。これにより、弾性体1の表面を損傷させることなくシート2のみを交換することができ、弾性体1の長期間の使用が可能となる。特に、弾性体1は硬度の低い材質で形成されるため、シート2の剥離の際に表面が損傷する可能性があるため、実施の形態1に係る構成を備えることにより、弾性体1の損傷が抑えられる。
実施の形態2に係る印刷用ブランケット210は、実施の形態1に係る印刷用ブランケット10に対し、弾性体1の形状を変更したものである。従って、印刷用ブランケット210の形状は、印刷用ブランケット10の形状と異なり、シート2の貼り付け領域も異なる。実施の形態2においては、実施の形態1からの変更点を中心に説明する。
Claims (10)
- 弾性体と、
該弾性体に接着されたシートと、を有し、
該シートを被印刷面に押し当てて印刷する印刷用ブランケットの製造方法であって、
前記シートの前記弾性体に接着される領域の周囲を固定するシート固定工程と、
固定された前記シートの接着面に前記弾性体の接着面が対向するように前記弾性体を設置する弾性体設置工程と、
前記弾性体の表面にワックス層を設けるワックス塗布工程と、
前記シート及び前記表面に前記ワックス層が設けられた前記弾性体のうち少なくとも一方に接着剤を塗布する接着剤塗布工程と、
前記シートと前記弾性体とを押し付け、前記シートを前記表面に沿うように伸ばしながら前記接着剤を介して前記シートを前記ワックス層が設けられた前記弾性体に密着させる押し付け工程と、を有する、印刷用ブランケットの製造方法。 - 前記ワックス塗布工程は、
前記弾性体の前記表面の全域にワックスを塗布する第1ワックス塗布工程と、
前記弾性体の頂部を含む前記表面の一部の領域のみにワックスを塗布する第2ワックス塗布工程と、を備える、請求項1に記載の印刷用ブランケットの製造方法。 - 前記シート固定工程は、
前記シートの前記弾性体に接着される領域を包囲する枠に前記シートを固定する、請求項1又は2に記載の印刷用ブランケットの製造方法。 - 前記弾性体設置工程は、
前記シートと前記弾性体の前記表面とを上下方向に対向させる、請求項1~3の何れか1項に記載の印刷用ブランケットの製造方法。 - 前記弾性体設置工程は、
前記弾性体の前記表面を上方向に向けて前記弾性体が設置され、
前記接着剤塗布工程は、
前記ワックス層を備える前記弾性体の上部に前記接着剤を載せ、前記ワックス層の上に前記接着剤を塗布する、請求項4に記載の印刷用ブランケットの製造方法。 - 前記押し付け工程は、
前記弾性体及び前記シートの少なくとも一方を上下方向に直動する移動手段により移動させる移動工程を有する、請求項4又は5に記載の印刷用ブランケットの製造方法。 - 前記弾性体から前記シート及び前記接着剤を剥がす除去工程をさらに備える、請求項1~6の何れか1項に記載の印刷用ブランケットの製造方法。
- 弾性体と、
該弾性体の表面を覆うワックス層と、
該ワックス層を覆う接着剤と、
該接着剤を覆うシートとを備え、
前記シートの表面にインクが転写される印刷面を備える、印刷用ブランケット。 - 前記ワックス層は、
前記弾性体の前記表面のうち前記弾性体の頂部を含む一部の領域の厚みがその他の領域における厚みよりも厚い、請求項8に記載の印刷用ブランケット。 - 前記ワックス層は、
カルナバ蝋が含まれる、請求項8又は9に記載の印刷用ブランケット。
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CN201880041769.4A CN111094007B (zh) | 2018-08-24 | 2018-08-24 | 印刷用橡皮布及印刷用橡皮布的制造方法 |
KR1020197033162A KR102262623B1 (ko) | 2018-08-24 | 2018-08-24 | 인쇄용 블랭킷 및 인쇄용 블랭킷의 제조 방법 |
PCT/JP2018/031375 WO2020039578A1 (ja) | 2018-08-24 | 2018-08-24 | 印刷用ブランケット及び印刷用ブランケットの製造方法 |
JP2020504258A JP6851539B2 (ja) | 2018-08-24 | 2018-08-24 | 印刷用ブランケット及び印刷用ブランケットの製造方法 |
US16/624,837 US11325411B2 (en) | 2018-08-24 | 2018-08-24 | Printing blanket and method for manufacturing printing blanket |
EP18917584.7A EP3842250A4 (en) | 2018-08-24 | 2018-08-24 | PRINT BLANKET, PRINTER AND METHOD OF MAKING A PRINT BLANKET |
TW108126796A TWI733149B (zh) | 2018-08-24 | 2019-07-29 | 印刷用膠毯及印刷用膠毯的製造方法 |
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US20210331509A1 (en) | 2021-10-28 |
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