JPS591191B2 - Method of manufacturing a mold for embossing paper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a mold used in an embossing expression method for forming irregularities on paper, and in particular, a male mold is formed from laminated paper impregnated with a thermosetting resin, By using this male die, countless sheets of paper can be made to stand out without losing their shape.

As is well known, in order to express uneven patterns on paper used for book spines, packaging boxes, labels, and other highly decorative materials, for example, a metal plate 1 and a paper mold 2 are Paper a is inserted and pressed using a pressure device.

On one side of the plate 10 (having a protrusion 4 forming a gourd-shaped base surface 3,
The surface of the mold 20 has a protrusion 6 in which an arcuate blood loss 5 is formed.

Therefore, when the paper a is inserted between the plate 1 and the mold 2 and pressurized, the paper a is pressed by the base surface 3 and the blood loss 5, and a desired embossed pattern is expressed.

Conventionally, in order to form the mold 2, a thick hard paper 7 is pressed with a plate 1, and the outline of the base surface 3 is displayed on the surface of the hard paper 10.

Next, a knife is applied to cut along the contour and unnecessary parts are removed.

Therefore, since the protrusion 6 of the mold 2 is made of hard paper,
When a large number of sheets of paper are pressed, the shape of the blood loss 5 gradually collapses, making it impossible to express a clear embossed pattern on the paper.

In particular, when a sheet of gold or silver foil is interposed between plate 1 and paper a and gold or silver foil is attached to the surface of the embossed pattern,
If the shape of the blood loss 5 of the mold 2 collapses, the foil will not adhere to the surface of the paper, resulting in a defective product.

Furthermore, since the hard paper 7 must be cut along the outline of the base surface 3 when molding the mold 2, not only is it extremely time-consuming, but it is also difficult to create fine patterns.

The present invention has been proposed in view of the above, and involves creating a mold using laminated paper impregnated with a thermosetting curing agent, and using this mold to express an embossed pattern on paper a. be.

The mold 2 used in the present invention is manufactured as follows.

That is, a laminated paper 7' impregnated with a thermosetting curing agent is attached to the surface of a substrate 80 made of Bakelite or other heat-resistant material.

The laminated paper 7' may be made by laminating a large number of thin papers impregnated with a hardening agent, or may be made by laminating thin papers impregnated with a hardening agent.

The hardening agent used is mainly woo melamine formalin resin,
Unia formalin resin, phenol formalin resin, epoxy resin emulsion, sodium silicate, etc., alone or in combination with aqueous liquids of synthetic or natural thermosetting substances, impregnated into laminated paper in a range of 1 to 12 weight percent. is desirable.

The laminated paper 7' made in this way is thick and relatively soft, so when the plate 1 is pressed using a pressurizing device while heating, the portion corresponding to the protrusion 4 is compressed and becomes thin. Since the curing agent is hardened, the compressed portion 9 becomes extremely hard.

Further, the surface of the compressed portion 90 has the same arcuate shape as the arcuate base surface 3 of the plate 1.

Furthermore, the portions 10 of the laminated paper 7' other than the compressed portions 9 are heated but are hardly pressurized, so they remain in a soft state.

Therefore, the boundary between the compressed portion 9 and the portion 10 becomes clear.

After the laminated paper T' is pressed as described above, it is cut with a knife along the boundary between portions 9 and 10, and portion 10 is peeled off.

In this case, since the boundary is soft, it is easy to cut with a knife (and since section 10 is laminated paper, it is only necessary to peel off the middle of the laminated paper so that section 10 is lower than section 9).

Therefore, in the portion 10, there is no need to peel off the adhesive surface with the substrate 8 (the peeling operation becomes extremely simple).

When the portion 10 is peeled off as described above, the substrate 8 has a raised portion 6 formed by the portion 9, and the surface of the raised portion 60 is an arcuate blood loss 5' having the same shape as the arcuate base surface 3 of the plate 1. Therefore, the mold 2' has a hard protrusion 6'.

The mold 2 manufactured as described above is placed and fixed on the frame of the pressurizing device, the plate 1 is positioned and fixed on the lifting frame, and paper a is placed between the plate 1 and the mold 2. When inserted and pressed, an embossed pattern is expressed on the paper a by the protrusions 4 of the plate 1 and the protrusions 6' of the mold 2'.

In addition, when a sheet coated with gold or silver foil is placed between plate 1 and paper a and pressed, the gold or silver foil adheres to the surface of the embossed pattern on paper a, resulting in a gold or silver embossed pattern. It becomes a pattern.

Therefore, the protruding parts of the mold manufactured according to the present invention are extremely hard because the laminated paper is compressed and the curing agent is hardened, and the arcuate blood loss 5' does not collapse even when a large number of sheets are pressed. This allows the paper to always produce clear embossed patterns.

In addition, when creating mold 2, the surface of the laminated paper impregnated with a hardening agent is further coated with a hardening agent, and then heated with plate 1.
Pressure treatment may also be applied.

If the surface of the laminated paper is treated with a hardening agent, the arcuate blood loss 5' will be further hardened when heated and pressurized with the plate 1, making it possible to increase the number of papers expressing vivid embossed patterns. can.

Also, if the surface of the laminated paper is coated with a thermochromic paint, etc., when heated and pressurized with plate 1, compressed areas 9 and 10
Since the color changes and the boundary becomes clear, the shape of the protruding portion 6' can be made accurate, and the portion 10 can be easily peeled off.

Furthermore, when creating the mold, a laminated paper which has been heated and pressurized with a plate to form the compressed portion 9 may be pasted on the substrate 8, and then the portion 10 may be peeled off.

In summary, according to the present invention, laminated paper impregnated with a hardening agent is pasted on a substrate with a mold for expressing an embossed pattern by pressing paper, and the laminated paper is heated and pressure-treated with a plate. It is manufactured by providing a compressed part that hardens and removing the other parts while leaving the compressed part.

Therefore, the raised portions formed on the mold become extremely hard, so that it is possible to press countless sheets of paper to create raised patterns, letters, figures, etc.

In addition, creating a mold is much easier than before, and even minute patterns can be created easily and clearly.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of a paper embossing expression device, Fig. 2 is a schematic front view when creating a conventional mold, and Fig. 3 is a schematic front view of a paper embossing expression device. Pasted front view,
FIG. 4 is a schematic front view of the mold of the present invention at the time of creation, and FIG. 5 is a front view of the created mold.

Claims (1)

[Claims] 1 A laminated paper impregnated with a thermosetting curing agent is pasted on the surface of a heat-resistant substrate, and the laminated paper is heated and pressurized using a plate having a protrusion with an arcuate base formed on one side, and the protrusion is A compressed part that hardens in a part of the laminated paper by heating and pressure treatment is provided, and the other part of the laminated paper that is hardly compressed other than the compressed part is peeled off from the substrate and is the same as the protruding part of the above plate. 1. A method for manufacturing a mold for embossing paper, characterized in that a mold for expressing an embossed paper is formed.