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Jetting out method for molding bicolor plastic cement

An injection molding and two-color molding technology, which is applied in the field of two-color plastic injection molding, can solve the problems of product yield decline and unsightly appearance

Inactive Publication Date: 2007-07-25
MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] In all current two-color plastic injection molding processes, when the transparent material is injected first, there will be traces of the feed point within the range of the transparent material, and at the same time, secondary processing is required to cut the feed port, resulting in an unsightly appearance and the problem of product yield decline

Method used

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  • Jetting out method for molding bicolor plastic cement

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Embodiment Construction

[0014] Please refer to FIG. 1 , a two-color plastic injection molding method is used to produce a two-color molded plastic product, which requires a plastic injection machine, which includes two molds and two nozzles. Each nozzle corresponds to independent feeding, heating, injection and other devices.

[0015] In this embodiment, the two-color molded plastic product includes a transparent material part and a non-material part. The transparent material part is formed with the first mold, and the opaque material part is formed with the second mold. The first nozzle is used to eject the transparent material, and the second nozzle is used to eject the non-transparent material.

[0016] The two-color plastic injection molding method of the present invention comprises the following steps:

[0017] Step 1: first close the mold (the first injection mold and the second injection mold), and use the first nozzle to inject a transparent material into the first mold for molding;

[001...

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Abstract

An ejection moulding method for preparing bichromic plastic product includes such steps as closing mould, using the first nozzle to eject a transparent material into the first mould, cooling, opening the mould, turning the movable part of the first mould to the position of the second nozzle, matching it with the fixed part of the second mould, closing the mould while turning the movable part of the second mould to the position of the first nozzle, matching it with the fixed part of the first mould, using the second nozzle to eject a color material into the second mould, cooling, and demoulding.

Description

technical field [0001] The invention relates to a two-color plastic injection molding method, in particular to a two-color plastic injection molding method which has no traces of feeding points on the transparent surface, does not need to cut the feeding points, and effectively improves the production yield. Background technique [0002] Two-color plastic injection molding refers to the molding method of injecting two different plastic materials into the mold under certain process conditions to form a plastic product in which the two materials are integrated. [0003] The existing two-color plastic injection molding products are usually buttons for 3C products, PDA palmtop computer casings, mobile phone casings, lamp lenses for automobiles, etc. [0004] In all current two-color plastic injection molding processes, when the transparent material is injected first, there will be traces of the feed point within the range of the transparent material, and at the same time, second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/16B29C45/10B29C45/27B29C45/38
Inventor 曾元宗
Owner MITAC PRECISION TECH CO LTD SHUNDE DISTRICT FOSHAN CITY
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