Three-color key injection molding technology

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...

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.

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