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Three-color key injection molding technology

A button and process technology, which is applied in the field of three-color button injection molding technology, can solve the problems of weak bonding between the second color and the third color, lack of market competitive advantages, and gaps in the fusion of plastic melts, etc., to achieve the elimination of product Internal stress, avoiding unstable assembly quality, and preventing product cracking

Inactive Publication Date: 2017-09-08
WENZHOU CHANGJIANG AUTOMOBILE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are some problems in the existing three-color injection molding: 1. The second color and the 3rd color are not firmly bonded when the parts are injected, and the parts often fail due to stress cracking, which cannot play a good role in waterproofing and dustproofing; 2. There is an obvious gap at the fusion of the second color and the third color plastic melt, and the obvious gap cannot be completely covered after painting, which seriously affects the appearance and use effect; 3. Many existing three-color injection moldings are molded in the first color Afterwards, demoulding is often required, followed by subsequent pouring, which is cumbersome, and the production cost is relatively large, the yield rate of parts is low, and it does not have a market competitive advantage. It needs to be improved and optimized.

Method used

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Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] see Figure 1-4 , a three-color button injection molding process, the steps are as follows:

[0042] S1: Mold opening for the first time: using a press and mold 1, said mold 1 includes two identical first rear molds 11 and second rear molds 12 and two different first front molds 13 and second front molds 14. The first rear mold 11 and the second rear mold 12 are center-symmetrically arranged on a turntable 2, the first front mold 13 and the second front mold 14 can move up and down, and the press is used to provide pressure;

[0043] S2: Mold installation: install the mold 1 above on the three-color injection molding machine 3; the first color of the three-color injection molding machine 3 adopts a three-plate mold with a fine nozzle to inject glue at the gate, and the second color and the third color use The point gate of the three-...

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Abstract

The invention relates to a three-color key injection molding technology. The technology comprises the steps in sequence of S1, opening a mold for the first time; S2, installing the mold; S3, closing the mold for the first time; S4, carrying out first color injection molding; S5, opening the mold and closing the mold for the second time; S6, carrying out second color and third color injection molding; S7, carrying out discharging; S8, carrying out subsequent processing; S9, carrying out paint spraying and laser engraving; and S10, installing a light guide body. The three-color key injection molding technology has the advantages that the yield is high, the production efficiency is high, a second color and a third color of a product are well fused, the waterproof and dustproof effects are good, the appearance is attractive, and the using effect is excellent.

Description

technical field [0001] The invention relates to a three-color button injection molding process, which belongs to the field of injection molding production technology. Background technique [0002] With the sharp increase in automobile consumption in recent years, its appearance changes have become more frequent than before, and the appearance requirements of corresponding injection molded parts are also getting higher and higher, and color superimposition is becoming more and more common. Under this demand, new injection molding processes and technologies have been successively developed and applied. Compared with traditional overmolding technology, two-color and three-color injection molding technologies have advantages in product appearance quality, appearance combination stability and production efficiency. More prominent, so two-color, three-color injection molding technology has been more widely promoted and applied than before. [0003] However, there are some problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/16B29C45/76B29C45/17B29C45/00B29C45/26B29C45/06B29C71/02B29L31/30
CPCB29C45/0053B29C45/0441B29C45/06B29C45/16B29C45/17B29C45/26B29C45/76B29C71/02B29C2045/0079B29C2045/1784B29C2945/76498B29C2945/76531B29C2945/76561B29L2031/30
Inventor 严胜义方建中胡光良
Owner WENZHOU CHANGJIANG AUTOMOBILE ELECTRONICS SYST
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