Mold for resin molding
A technology of resin molding and molding molds, applied in the direction of coating, etc., can solve the problems of a large number of processes, embossed surface processing difficulties, etc., and achieve the effect of improving texture
Active Publication Date: 2021-05-11
TANAZAWA HAKKOUSHA CO LTD
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Problems solved by technology
[0006] However, as described above, it is necessary to adjust the unevenness interval required for embossing the surface of the molding die described in Patent Document 1. In addition, after embossing the surface of the molding die, it is necessary to perform many steps. Sand blasting is the first time, so a lot of work is required
In addition, it can be said that it is very difficult to uniformly process the entire embossed surface through these numerous processes.
Method used
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Effect test
experiment example
[0073] Carry out following experiment: That is, prepare the test board of the mold for resin molding that has mirror-coat layer 16 in the molding die 12 as an example, prepare the mold for resin molding that does not form mirror-coat layer in the molding die as a comparative example. The test board was a test board for evaluating each mold for resin molding. The evaluation was performed by measuring the gloss value of the mold surface of the test plate of the mold for resin molding.
[0074] 1. Mold for resin molding
[0075] (Example)
[0076] The base materials of the test plates of the molding dies of Examples 1 to 3 were all carbon steels (S50C) for machine structures. In addition, the dimensions of the test plates of the molds for resin molding of Examples 1 to 3 were 100 mm in longitudinal length, 150 mm in transverse length, and 10 mm in thickness.
[0077] In addition, in Examples 1 to 3, embossing was performed by a conventional method. In addition, in Examples 1 ...
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Abstract
The present invention provides a mold for resin molding, which can relatively easily obtain a resin that makes the product surface of a resin molded product shine and enhances texture with high gloss, even in a resin molding mold having unevenness formed by embossing moldings. The resin molding die (10) of the present invention is a resin molding die for molding a resin molded product. The resin molding mold (10) includes a molding mold (12), and a mirror coating (16) formed on the surface of a mold surface (12a) of the molding mold (12). The mirror coating (16) is formed of a thermosetting resin with a thermal conductivity of 0.10 W / m K or more and 0.99 W / m K or less, and the thickness of the mirror coating (16) is 1.0 μm or more and 30 μm or less, preferably 20 μm or less . The surface of the mirror coating (16) has a substantially planar planar retaining portion (18).
Description
technical field [0001] The present invention relates to a mold for resin molding, and more particularly, to a mold for molding resin for molding a resin molded product that has a high-grade gloss and a high-grade appearance. Background technique [0002] For example, for a long time, we have been pursuing the high-end feeling of resin molded products used as automotive interior parts, especially the high-end feeling of instrument panels and decorative parts installed around car windows. Such a resin molded article is molded with a molding die that is subjected to surface processing called embossing. In this way, a fine concave-convex pattern called embossing is provided on the surface of the resin molded product. [0003] The purpose of such embossing is to produce subtle shadows, moderate gloss and texture on the surface of the resin molded product, thereby giving a high-end appearance. On the other hand, embossing also has the practical purpose of making inconspicuous ap...
Claims
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IPC IPC(8): B29C33/38
CPCB29C33/38B29K2995/0012B29K2995/0097B29C33/56B29C45/26B29C59/022B29C33/424B29C33/42B29C45/372
Inventor 酒井政幸青田久男
Owner TANAZAWA HAKKOUSHA CO LTD