Material Analysis
4 조회수
Pockmarks/pinholes on product surface
문제 현상
A large number of tiny holes or pits appear on the surface, with rough hand feel, seriously affecting appearance
원인 분석
Dispersed phase particles are too large, forming defects on the product surface; gas entrained during melt filling is not compacted; additive decomposition
해결 방법
Improve the dispersion shear effect of the screw mixing section; reduce injection speed to reduce gas entrainment; increase holding pressure and extend holding time by 50%
핵심 요약
Surface pinhole defects originate from insufficient dispersion and gas entrainment
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