JP2012201110A - Printing machine, printing method, and blanket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the plate life of stable printing by way of heating and discharging the solvent that is absorbed to a silicon blanket in each case at the printing.SOLUTION: A blanket provided with a metal plate layer for the lower layer of the silicone rubber layer of a silicon blanket 15 is made. The solvent in the resin (ink) absorbed into the rubber is released by way of making the metal plate generate heat by projecting magnetic force lines from the surface and heating the rubber layer efficiently.

Description

  Related to printing press, printing method and configuration of silicon blanket in offset printing.

  Various patterning techniques are used in the process of making electrical parts and the like. As a low cost method, gravure offset using a silicon blanket or inversion method (reverse method) is used. A silicon blanket made of silicon rubber is used for these printings.

  Silicone blankets have the property of absorbing the solvent (13) of the resin (ink) (12), and this has changed the transferability of the ink, and there are unstable elements such as limited printing durability. Yes.

  In the offset printing method using the silicon blanket (15) made of silicon rubber, the solvent contained in the resin (ink) for image formation is absorbed and accumulated in the blanket.

  In this accumulation, there is a problem that the transferability of the resin (ink) in the blanket changes and it becomes impossible to continue printing. This plan was devised to solve this problem.

Means to solve the problem

  This plan was devised to solve the above-mentioned problem. The silicon blanket (15) was heated at a predetermined timing to evaporate the solvent (13) from the resin (ink) accumulated in the silicon rubber layer (7) of the blanket. Let's avoid accumulation more than necessary.

For this purpose, a heating device is attached to the printing press, and the blanket has a structure that generates heat in response to the overheating device.
As the heating device, a magnetic force line generating device (IH: Induction Heating Device) system that generates a high-frequency current and flows the heat circuit (3) to generate magnetic lines of force in the circuit and heats a metal plate or the like close to the circuit is used.

    As the blanket, a silicon blanket in which a metal plate (8) that generates heat in response to the lines of magnetic force is incorporated under the silicon rubber layer (7) is used.

Effect of the invention

    Since the blanket can be heated during the printing operation, the amount of solvent absorbed from the ink in the blanket is controlled to enable stable and continuous printing.

  Because it heats directly by self-heating of the metal plate configured in the blanket using magnetic field lines by high frequency as a heating means, and because only the surface layer part of the metal plate can be heated by changing the frequency of the high frequency,

The heat generation effect can be limited to only the necessary surface layer portion of the blanket cylinder. For example, the blanket can be instantaneously heated, and printing can be continued without reducing printing productivity.

  Also, by providing a heat reflecting layer (9) in the lower layer of the metal plate (8), heat conduction to the lower layer can be cut off, and heat generation in the blanket cylinder (21) (2) can be minimized. It also contributes to maintaining the dimensional stability of printed matter.

BEST MODE FOR CARRYING OUT THE INVENTION

In order to irradiate the entire surface of the rotating blanket cylinder with magnetic field lines,
The heat circuit to be used is a magnetic line generator having an oval heat circuit (24) with a copper wire in a long spiral shape on one plane, and a position where the longitudinal direction of the circuit can be close to the axis of the blanket cylinder Prepare a printer installed in the printer.

  A silicon blanket coated with a silicon rubber layer (7) using a metal plate (8) such as a stainless steel plate or an iron plate as a base substrate as a material that generates heat in response to magnetic lines of force is prepared and affixed to the blanket cylinder.

  At the time of use, a high-frequency current is passed through the circuit at a predetermined timing during printing to generate magnetic lines of force, the blanket generates heat, and a predetermined amount of solvent (17) absorbed from the resin (ink) (12) in the silicon rubber layer is released. The transferability and release property of the blanket are stabilized, and printing is continued stably.

An example of a printing machine according to claim 1 will be described with reference to FIG.
An example of using a printing machine in which a blanket cylinder is fixed and rotated will be described.
The plate cylinder (14) is crimped, and the heat circuit (3) of the magnetic field generator is fixed in close proximity to the blanket cylinder (2) to which the sheet substrate (1) is crimped via the impression cylinder (25). A printing machine having a structure in which magnetic field lines are irradiated while rotating is used.

The blanket of claims 3 and 4 and the printing method of claim 2 will be described.
A silicon blanket (Claim 3) is prepared in which a silicon rubber layer (7) is formed on the surface of a metal plate (8) serving as a heat generating layer. Furthermore, a blanket is prepared in which a heat reflecting layer (9) is provided on the back surface (opposite surface of the silicon rubber layer) of the metal plate (claim 4).

  As the heat reflection layer, a sheet is used in which an AL vapor-deposited film (11) is applied on the surface of the polyethylene layer or polypropylene layer (10), and further a polyethylene layer or polypropylene layer (10) is applied.

  Affix these blankets to the blanket cylinder. Resin (ink) is supplied to the plate surface pixel portion of the plate cylinder (FIG. 6- 1), the resin is transferred to the blanket cylinder (FIG. 6- 2), and the resin is transferred to the sheet substrate (FIG. 6- ▲). 3)) In the printing process, the magnetic line of force generator circuit is energized at a predetermined timing to heat the blanket and partially evaporate the absorbed solvent (Fig. 6- (4)) to control the amount of absorbed solvent in the blanket. However, stable continuous printing is performed (claim 2).

An example of the printing machine according to claim 1 will be described with reference to FIG.
An example of a printing machine in which the blanket cylinder (2) travels (rolls) on the plate surface plate (6) and the printing surface plate (5) will be described.
A printing machine was prepared in which the heat circuit (3) of the line of magnetic force generator was installed in close proximity so that the longitudinal direction of the circuit was parallel to the axis of the blanket cylinder at a fixed position in the travel area of the blanket cylinder.

The printing method of claim 2 will be described.
Use the same blanket as in Example 1 and attach it to the blanket cylinder.
The blanket cylinder rolls to transfer the resin (ink) (12) from the upper plate surface (6) to the blanket (15) surface, and further moves to the printing surface plate (5) surface to transfer the resin (ink) to the substrate (5 '), The blanket cylinder is stopped near the heat circuit (3) at a predetermined timing, the circuit is energized, the blanket (15) surface is heated, and the absorbed solvent is partially evaporated. Stable continuous printing while controlling the amount of absorbing solvent.

  Used to increase the printing durability (continuation of stable printing) using a silicon blanket.

  The diagram of the description of the printing press according to claim 1, wherein the heat circuit (3) part of the magnetic field generator is fixed at a position where the blanket cylinder (2) is fixed and close to it.   The blanket cylinder (2) is a printing machine in which the platen surface plate (6) and the printing surface plate (5) are moved. The heat circuit (3) part of the magnetic field generator is fixed at a predetermined position, and the blanket cylinder is printed. The figure of description of the printing machine shown in Claim 1 which has a structure which adjoins at predetermined timing and rotates and irradiates a magnetic field line to a blanket surface   The figure of description of the structure of the silicon blanket which generate | occur | produces heat in response to the magnetic force line shown to Claim 3. The figure which has apply | coated the silicon rubber layer (7) on the upper surface of a metal plate (8)   The figure of the silcon blanket shown in Claim 4 which provided the heat | fever reflective layer (9) in the lower layer of the silicon blanket shown in Claim 3.   It is a figure of description of the structure of the heat | fever reflection layer (9) used in Claim 4, and the structure which gave AL vapor deposition film on the polyethylene layer or the polypropylene layer (10) surface, and also gave the polyethylene layer or the polypropylene layer (10) Illustration of description   FIG. 2 is a diagram for explaining the principle of the printing method shown in claim 2. (1) A figure in which a plate (14) is filled with resin (ink) (12) containing a solvent (13). (2) Resin (ink) on the surface. Part of the film is transferred to the silicon rubber layer (7) surface of the silicon blanket, and the solvent is absorbed. (3) The resin (ink) on the silicon rubber layer (7) surface is transferred to the substrate (18). Illustration of the absorbed solvent (17) remaining in the blanket (4) Illustration of heating and removing a part of the absorbed solvent (17) by heating the blanket   The figure explaining the effect of the heat | fever reflecting layer shown in Claim 4. (1) It is an example of a blanket without a heat | fever reflecting layer, and the magnetic force line (20) which came out of the heat circuit (3) heated a metal plate (8), and silicon rubber Figure (2) shows the heat (22) absorbed by the blanket cylinder (21) when the layer (7) is heated. (2) The figure of the blanket with the heat reflection layer. The heat of the metal plate (8) 9) The heat reflected by (23) becomes (23), and the heat does not enter the blanket cylinder, thereby increasing the heating effect of the silicon rubber layer (7).   It is a figure of explanation of the heat circuit part (3) of a magnetic field line generator, and is a figure of explanation manufactured to an oval heat circuit (24) in order to install in parallel with the trunk axis

DESCRIPTION OF SYMBOLS 1, Sheet substrate 2, Blanket cylinder 3, Heat circuit 4, Plate cylinder 5, Printing surface plate 5 ', Substrate 6, Plate surface plate 7, Silicon rubber layer 8, Metal plate 9 Heat reflection layer 10 Polyethylene layer or polypropylene layer 11 , AL vapor deposition layer 12, resin (ink) 13, solvent 14, intaglio 15, silicon blanket 16, resin 17 transferred to the blanket 17, absorbed solvent 18, substrate 19, solvent 20 evaporating into the atmosphere 20 magnetic field lines 21 blanket cylinder 22 , Heat absorbed by the blanket cylinder 23, reflected heat 24, oval heat circuit 25, impression cylinder

Claims (4)

  An offset printing machine that irradiates magnetic lines of force to a blanket cylinder using a magnetic line generator that generates magnetic lines of force by a high-frequency current.   A silicon blanket that generates heat in response to magnetic field lines is affixed to the blanket cylinder, irradiated with magnetic field lines at a predetermined timing during printing, and printing is performed while evaporating and removing a portion of the solvent absorbed in the blanket. Characteristic printing method.   3. The silicon blanket according to claim 2, wherein a metal plate (8) that generates heat due to the magnetic lines of force (20) is placed as a heat generating layer under the silicon rubber layer as a silicon blanket that generates heat in response to the lines of magnetic force.   4. The silicon blanket according to claim 3, wherein a heat reflecting layer (9) is provided in a lower layer portion of the heat generating layer.

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