Material Drying 4 조회수

Internal voids of PU

문제 현상

1-3mm voids appear inside PU products, concentrated in the thick-wall center

원인 분석

Insufficient holding, thick-wall center not compacted; gas entrapped and cannot be discharged; raw material moisture vaporized

해결 방법

1) Increase holding pressure to 60-80MPa for full compaction; 2) Increase mold venting; 3) Fully dry raw material

핵심 요약

Internal voids are caused by insufficient holding and gas entrapment; high-pressure holding and venting are key

PU internal voids holding pressure mold venting raw '2079851475616104451

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