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Plastic molded product

A molded product and plastic technology, applied in the field of plastic molded products, can solve the problems of conical top impact breaking, low mirror gloss, poor durability, etc., and achieve the effect of not easy to break, reduce mirror gloss, and not easy to wear off

Pending Publication Date: 2019-12-24
YKK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, it is generally believed that the formation of multiple conical protrusions on the surface of plastic moldings is to use the protrusions to reflect light diffusely, so that the specular gloss is smaller than that of plastic moldings processed by electrical discharge machining or sandblasting, but the conical top is easily damaged by external impact. Breaks, also wears off easily due to friction
That is, poor durability

Method used

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  • Plastic molded product
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Examples

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Embodiment Construction

[0061] Such as figure 1 As shown, the plastic molded article of the first embodiment of the present invention is composed of a plastic main body 1 . The plastic main body 1 is made of, for example, POM (polyoxymethylene), and has a region 2 with relatively high specular gloss and a region 3 with relatively low specular gloss on its surface.

[0062] The region 2 with a high specular gloss is a portion with a specular gloss of 5.5 or more, and in this embodiment, is the surface of the non-porous plastic main body 1 .

[0063] The region 3 with a small specular glossiness is a portion with a specular glossiness of less than 5.5. In this embodiment, a hole group 4G consisting of a plurality of holes 4 recessed from the surface of the plastic body 1 and a hole group 4G formed in the plastic body 1 are provided. The surface is the surface body surface 5 between adjacent holes 4 , 4 .

[0064] The main body surface 5 is a surface on which a plurality of holes 4 are opened, in oth...

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Abstract

Provided is a plastic molded product having reduced specular gloss and improved durability. This plastic molded product is provided with a plurality of holes (4) which are recessed in the common depthdirection into the outer surface of the plastic main body (1). The holes are each provided with: an inner surface (42) including an entrance (41); an inherent reference plane (6) perpendicular to thedepth direction and including at least a portion of the entrance; and a reference point (P0) at a depth separated, in the direction toward the depth side of the hole from the entrance-side center point (C41) on the inherent reference plane, by a distance that is 1 / 4 of the maximum value (W) of the opening diameter of the entrance side on the inherent reference plane. In addition, the bottom section, which is the deepmost portion of the inner surface of the hole, coincides with the reference point or is positioned further toward the depth side than the reference point.

Description

technical field [0001] The present invention relates to a so-called matte plastic molded article having a small specular gloss. Background technique [0002] Plastic moldings come in various specular gloss levels. In addition, as an example of a conventional plastic molded product having a low specular gloss, there is a plastic molded product formed using a wrinkled mold. Wrinkling processing refers to processing that does not mirror-finish the surface of the mold, but forms fine unevenness and transfers the pattern to the molded product. [0003] In addition, electrical discharge machining and sand blasting are known as general examples of conventional wrinkling machining. When molded using a mold subjected to electrical discharge machining or sandblasting, the entire surface of the plastic molded product will be in a rough state. [0004] In addition, as another example of wrinkling processing, it is known to use laser processing to form a plurality of conical small hol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/42
CPCB29K2995/0024B29L2031/727B29C37/0053B29C45/37B29C45/263
Inventor 吉江谦一黄铭仪上田诚
Owner YKK CORP
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