JP6362411B2 - Blanket for printing - Google Patents

Description

  The present invention relates to a printing blanket.

  Conventionally, in blanket printing (same as pad printing), gravure printing, screen printing, etc., a device for improving the design of characters and patterns displayed on a printing surface has been made. For example, the inventor of the present invention discloses an invention that improves printing accuracy and enables multicolor printing by combining a relief printing original plate with a printing pad (see, for example, Patent Document 1).

JP-A-2-239972 (page 8-9, FIG. 3)

The invention disclosed in Patent Document 1 is suitable for printing on a flat surface or curved surface, and the thickness of the ink transferred to the printing surface is substantially uniform, and a desired character or pattern is printed with high accuracy. It is something that can be done.
However, recently, there is a demand not only to print characters and patterns with high accuracy, but also to add design properties to the printed characters and patterns.

  The present invention meets the above-described requirements and provides a printing blanket that can improve the design of the printing surface.

(1) A printing blanket according to the present invention is a printing blanket made of an elastic body that becomes thinner toward the tip, and is pressed against a printing original plate on which a plurality of recesses are formed and ink is applied. In this case, a larger amount of ink is transferred to the concave portion than the range excluding the concave portion, and the concave portion is a hole having the same depth or a different depth, and is irregularly or regularly arranged. is, depth, characterized in 5~100μm der Rukoto.
( 2 ) Also, a printing blanket made of an elastic body that becomes thinner toward the tip, when a plurality of concave portions are formed on the surface and pressed against a printing original plate coated with ink, A larger amount of ink is transferred than the range excluding the recesses, and the recesses are grooves having the same depth or different depths, and are formed in parallel with each other or intersecting each other. .
( 3 ) Further, the depth of the recess is 5 to 100 μm.
( 4 ) Further, the concave portion is formed in a sheet material, and the sheet material is installed on the surface of an elastic body that has a flat surface and becomes narrower toward the tip.

(I) Since the printing blanket according to the present invention has a larger amount of ink transferred to the concave portion than the range excluding the concave portion (flat portion or convex portion), when pressed against the printed surface, the printing blanket A larger amount of ink is transferred to the position corresponding to the recess than the range excluding the position. Therefore, since unevenness is formed in the printed pattern (including characters and the entire surface fill), a three-dimensional pattern is generated, and the design of the printed surface can be improved.
(Ii) Further, since the concave portion is a hole or a groove and is formed irregularly or with regularity, it becomes possible to embody the desired designability, and the designability is further improved.
(Iii) Furthermore, since the sheet material in which the concave portion is formed is installed on the surface of the elastic body, it is easy to manufacture and inexpensive, and is updated by replacing only the sheet material with respect to deterioration such as wear. In addition, since the elastic body can be used repeatedly, the material cost for long-time use can be kept low.
(Iv) Since the depth of the recess is 5 to 100 μm (micron), the depth can be appropriately selected according to desired design properties.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view illustrating a printing blanket according to Embodiment 1 of the present invention. Sectional drawing which shows each process in the printing using the printing blanket shown in FIG. BRIEF DESCRIPTION OF THE DRAWINGS The manufacturing procedure of the printing blanket which concerns on Embodiment 1 of this invention is demonstrated, Comprising: (a) is sectional drawing of the side view which shows a metal mold | die, (b) is sectional drawing which shows the preparation procedure of a sheet | seat, (C) is sectional drawing which shows the produced sheet, (d) is sectional drawing which shows the completed printing blanket.

[Embodiment 1]
1 and 2 illustrate a printing blanket according to Embodiment 1 of the present invention. FIG. 1 is a longitudinal sectional view, and FIGS. 2 (a) to 2 (d) are for printing shown in FIG. It is sectional drawing which shows each process in the printing using a blanket. FIGS. 1 and 2 schematically show partly exaggerated, and the present invention is not limited to the illustrated form (size and quantity).

In FIG. 1, a printing blanket 10 is made of an elastic body that becomes thinner toward the tip 11, the tip 11 forms a part of a substantially spherical surface, and the side surface 12 has a substantially arc-shaped longitudinal section. And has a curved surface projecting outward (similar to a shape obtained by rotating a part of an ellipse).
And the some recessed part 1 is formed in the front-end | tip 11 and the side surface 12 (at least the range near a front-end | tip). For convenience of explanation, the surfaces of the tip 11 and the side surface 12 excluding the concave portion 1 are referred to as convex portions 2. In FIG. 1, the concave portion 1 and the convex portion 2 are exaggerated and drawn greatly.
Moreover, although the substantially circular hole which each has the same shape (depth and internal diameter) is shown as the some recessed part 1, this invention is not limited to this, A rectangular hole and so that it becomes the back | inner side The hole of the taper strip | line which becomes narrow may be sufficient. Further, it may be a groove having a long length with respect to the width. At this time, the depths and widths of the respective concave portions 1 are various (same or different), and may be arranged with regularity or irregularly, so that the concave portions 1 overlapped with each other in a complicated manner. Can become a pattern.

In FIG. 2A, the ink 3 is uniformly applied to the printing original plate 20.
In FIG. 2B, the printing blanket 10 is pressed against the printing original plate 20. At this time, a larger amount of ink 3 enters the concave portion 1 than the convex portion 2.
In FIG. 2C, when the printing blanket 10 is separated from the printing original plate 20, a larger amount of ink 3 is transferred to the concave portion 1 than the convex portion 2.
In FIG. 2 (d), when the printing blanket 10 having a larger amount of ink 3 transferred to the concave portion 1 than the convex portion 2 is pressed against the substrate 30, the position corresponding to the concave portion 1 is A larger amount of ink 3 than the position corresponding to the convex portion 2 is transferred to the surface 31 of the printing medium 30.

Accordingly, a plurality of portions with a large thickness of the ink 3 and a plurality of portions with a small thickness of the ink 3 are generated on the surface 31 of the printing medium 30, so that a three-dimensional pattern is formed on the surface 31. . Therefore, the design of the surface is improved.
In addition, since the form of the recessed part 1 is not limited as mentioned above, the shape and depth are changed for every recessed part 1, or the recessed part 1 is arrange | positioned with specific regularity, and design nature is made more. It may be improved.
In addition, the depth of the recessed part 1 is 5-100 micrometers, Comprising: A depth can be suitably selected according to desired design property.

FIGS. 3A and 3B illustrate the manufacturing procedure of the printing blanket according to the first embodiment of the present invention. FIG. 3A is a side sectional view showing a mold, and FIG. Sectional drawing, (c) is a sectional view showing the produced sheet, and (d) is a sectional view showing the completed printing blanket.
In FIG. 3A, a cavity 45 is formed by a lower mold 40 in which a plurality of mold recesses 42 are formed and an upper mold 50 having a flat surface 51. At this time, in the lower mold 40, a mold convex portion 41 is formed between the mold concave portions 42.
In FIG. 3B, the silicon rubber 4 is injected into the cavity 45.
In FIG. 3C, the silicon rubber 4 is solidified (is elastically deformed only by losing fluidity), and has a concave portion 1 having a shape in which the mold convex portion 41 is inverted on one surface, A sheet material 6 having a flat surface 5 formed by a flat surface 51 is formed on the other surface. At this time, a convex portion 2 having a shape in which the mold convex portion 41 is inverted is formed between the concave portions 1.

In the above, the cavity 45 is formed using the upper mold 50 having the flat surface 51. However, the present invention is not limited to this, and the upper mold 50 is not used. Silicon rubber 4 may be poured into a corresponding range.
Moreover, the point which forms the mold convex part 41 (exactly the mold concave part 42) in the lower mold 40 is not limited, and laser processing, an etching method or the like may be used. In addition, the upper and lower sides of the lower mold 40 and the upper mold 50 are names for convenience, and when they are arranged horizontally, any of them may be arranged below (or above), or each may be vertically arranged. It may be arranged.

In FIG. 3D, the flat surface 5 of the sheet material 6 is attached to the surface of the elastic body 9 which has no concave portion on the surface 8 and becomes thinner toward the tip, and the printing blanket 60 is manufactured. Yes.
Therefore, the printing blanket 60 can be easily manufactured and is inexpensive. In addition, it is possible to renew only the sheet material 6 with respect to deterioration such as wear, and the elastic body 9 can be used repeatedly. Therefore, the material cost for long-time use can be kept low.
The printing blanket 60 is obtained by attaching the sheet material 6, but the concave portion 1 may be directly processed on the surface of the elastic body 9 with a laser or the like like the printing blanket 10.
Furthermore, although the shape of the printing blanket 10 is a rotating body as described above, the present invention is not limited to this, and the cross-section is “diaper shape (an arc with a small curvature radius at the tip and an arc with a large curvature radius on the side surface). It may be a column of “substantially triangular shape)”.

  According to the present invention, since a three-dimensional pattern is generated and the design of the printing surface can be improved, it can be widely used as a printing blanket when printing on various objects.

DESCRIPTION OF SYMBOLS 1 Concave part 2 Convex part 3 Ink 4 Silicon rubber 5 Flat surface 6 Sheet material 8 Surface 9 Elastic body 10 Printing blanket 11 Tip 12 Side surface 20 Printing original plate 30 To-be-printed body 31 Surface 40 Lower metal mold | die 41 Type convex part 42 Type recessed part 45 Cavity 50 Upper mold 51 Flat surface 60 Printing blanket

Claims (4)

A printing blanket made of an elastic body that becomes thinner toward the tip,
When a plurality of recesses are formed on the surface and pressed against a printing original plate coated with ink, a larger amount of ink is transferred to the recesses than the range excluding the recesses ,
The recess is
A hole having a same depth or depths that are different, is arranged with an irregular or regular, printing blanket depth, characterized in 5~100μm der Rukoto. A printing blanket made of an elastic body that becomes thinner toward the tip,
When a plurality of recesses are formed on the surface and pressed against a printing original plate coated with ink, a larger amount of ink is transferred to the recesses than the range excluding the recesses,
It said recess is a groove having a same depth or depths that are different, printing blanket you characterized in that it is formed by intersecting parallel to one another or to each other. The printing blanket according to claim 2 , wherein the depth of the recess is 5 to 100 μm. Said recess is formed in the sheet material, the sheet material, the surface is flat, any of claims 1 to 3, characterized in that it is placed on the surface of the elastic body is tapered enough to approach the tip 1 Blanket for printing as described in the paragraph .

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