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Method for producing plastic components

A technology of plastic parts and plastics, which is applied in the field of manufacturing plastic parts and can solve problems such as labor and labor

Inactive Publication Date: 2004-09-08
TRW AUTOMOTIVE ELECTRONICS & COMPONENTS GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It's a very labor-intensive process

Method used

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  • Method for producing plastic components
  • Method for producing plastic components
  • Method for producing plastic components

Examples

Experimental program
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Embodiment Construction

[0013] The first step of the present invention is to form by injection molding such as figure 1 The blank shown in 1. This blank can take any desired shape; it is an opaque plastic part, preferably black, with a recessed space 2 forming a mark or symbol in plan view, which is the translucent area on the front face, It can be seen on a display panel or cover or similar when it is illuminated. The recessed space 2 extends vertically completely through the blank from an opening on the front surface of the blank.

[0014] figure 2 The second step performed by the method according to the invention is shown. This second step can be carried out in the same mold as the previous step or in another mold. A thin layer 3 of the second plastic part is molded onto the surface of the blank 1 . This layer is very thin so it is translucent. Its color can be chosen so as to closely match the surrounding colors. It spans the opening in the surface of the blank. These two plastic parts t...

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Abstract

A plastic part 5 having a main body 1 and a front surface having at least one translucent area distinct from an opaque area is produced through the following steps: the first step wherein an opaque plastic component is injection molded into a member having a recess 2 so that the recess 2 extending from its opening in a surface of the member toward its inside has a shape and a position corresponding to those of the translucent area; and the second step wherein at least the above-mentioned surface of the member is covered with a layer of a colored plastic component so that the layer thin enough to be translucent straddles the opening at the surface of the member.

Description

【Technical field】 [0001] The invention relates to a method for producing a plastic part having an opaque body and at least one translucent region delimited by the opaque body. Such plastic parts are used in particular in vehicle technology as panes, covers, operating and display panels and the like. A light source illuminates the translucent area from behind and forms the illuminated symbol on the front. 【Background technique】 [0002] Due to the use in vehicles, it is necessary that the color of the plastic part, at least with regard to its visible front, be exactly in accordance with the specifications, so that the plastic part can be adapted to its surroundings in an ideal manner. This need can be met by injection molding the body using a plastic composition with a defined colour, so that the translucent regions are made with thin walls and delineated by solid, opaque wall portions. However, with this process, it is not possible to delineate the translucent area with a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/16
CPCB29K2995/0025B29K2995/0029B29K2995/0026B29C45/16
Inventor 托马斯·艾布纳
Owner TRW AUTOMOTIVE ELECTRONICS & COMPONENTS GMBH & CO KG
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