Injection Molding
6 조회수
Poor Surface Gloss of PE Injection Molded Products
문제 현상
The surface of PE products is dull and not bright, failing to reach the expected gloss.
원인 분석
Low mold temperature and insufficient holding pressure make the melt's replication of the cavity surface inadequate, so gloss cannot come out; PE itself has a relatively soft surface and inherently low gloss; if the mold polishing grade is also insufficient, the three superimpose and the product is dull and not bright, making it difficult to achieve a high-gloss effect.
해결 방법
①Appropriately increase mold temperature and holding pressure to improve the melt's surface replication of the cavity; ②Raise the cavity polishing grade to lift the gloss ceiling; ③Confirm whether the gloss characteristics of the grade used match the requirements; ④Improve venting to avoid gas marks affecting gloss; ⑤For high-gloss requirements, directly select a high-gloss grade.
핵심 요약
PE gloss is greatly limited by the material itself: mold temperature and holding pressure determine the degree of surface replication, mold polishing determines the gloss ceiling, and the grade determines the gloss limit; therefore, to make high-gloss PE parts, first select the right grade, then talk about process and mold — the order cannot be reversed.
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