Injection Molding
5 조회수
Oil spots on PVA injection molded products
문제 현상
Oil spots appear on the surface of PVA injection molded products after demolding, mold release agent residue or lubricant precipitation
원인 분석
Mold release agent sprayed too much or unevenly distributed; PVA internal lubricant stearic acid type precipitates to the surface; mold lubricating oil seeps into the cavity
해결 방법
1) Reduce mold release agent dosage or switch to dry film release agent; 2) Use internal lubricant to replace external release agent; 3) Seal mold lubrication parts to prevent oil seeping into the cavity; 4) Clean product surface to remove oil spots and then test the source
핵심 요약
Oil spots are caused by external sources of release agent and lubricant; reducing release agent and sealing mold lubrication are key
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