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Resin forming product and metal die for resin forming

A resin molding and metal mold technology, which is applied in the field of resin molding products and metal molds for resin molding, can solve the problems of increasing the risk of damage to the wrinkled processed surface, and achieve the effect of preventing grinding to the wrinkled processed surface.

Inactive Publication Date: 2008-08-06
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when using a resin material such as polycarbonate that generates gas during injection, the smooth copy surface must be polished every day, which increases the risk of damage to the wrinkled surface.

Method used

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  • Resin forming product and metal die for resin forming
  • Resin forming product and metal die for resin forming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Embodiments of the resin molded article and the mold for resin molding of the present invention will be described below with reference to the drawings.

[0019] 1 and 2 show an example of a resin molded product. This resin molded product 1 is a case where the present invention is applied to a front cover (lens) of a vehicle lamp. The front cover 1 is integrally formed of a substantially flat front portion 2 and a peripheral portion 3 protruding rearward from the peripheral edge of the front portion 2 . On the inner surface of the front part 2, a peripheral edge portion 4 of a certain width protrudes inwardly from a portion 5 inside the peripheral edge portion 4, and this peripheral edge portion 4 becomes a wrinkle forming surface, and fine unevenness, that is, so-called wrinkles 6, 6, are formed. ... (the height (or depth) of the wrinkles 6, 6 ... is several μm to several hundreds of μm, but it is exaggerated in the figure). And, the portion 5 located inside the wrink...

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Abstract

A resin molded product and mold for molding a resin. The resin molded article 1 has the smooth surface 5 adjacent to the embossed surface 4 having fine uneven parts, that is, embossed parts 6 and has a stepped surface 7 protruded to the embossed surface formed at the boundary of the embossed surface and the smooth surface. Therefor, it is possible to clearly see the boundary of the embossed surface and smooth surface of a resin molded article and to facilitate the production and grinding of a die for molding a resin.

Description

technical field [0001] The present invention relates to a novel resin molded product and a mold for resin molding. In particular, it relates to a technique for making and polishing a mold for resin molding that can clearly see the boundary between a wrinkle-forming surface and a smooth surface in a resin molded product. Background technique [0002] In a resin molded product, there are fine unevenness, that is, a wrinkle-forming surface with wrinkles and a smooth surface without wrinkles (in this specification, the surface without wrinkles is collectively referred to as the smooth surface with respect to the wrinkle-forming surface. ) a structure formed adjacent to each other. For example, in a vehicle lamp, there is a structure in which a transparent part (smooth surface) occupying most of the front cover on the front cover (lens) covering the front of the concave part where the light source of the lamp body is arranged is provided with a A wrinkle-forming surface designed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/26F21V3/02F21S8/10B29C33/38B29C33/42B29L31/30F21V5/00F21V17/00F21W101/10
CPCB29C33/424B29C33/3842B29L2011/0016B29L2031/747
Inventor 梶山繁
Owner KOITO MFG CO LTD