Material Drying
4 조회수
Silver streaks caused by moisture in CEF processing
문제 현상
White silver streaks appear on the surface of the CEF injection molded part
원인 분석
The raw material contains moisture >0.05%, which vaporizes during high-temperature processing to form bubbles that are stretched into silver streaks; insufficient drying or condensation of water vapor in the hopper
해결 방법
1) Dry the raw material at 80°C for 3-4h to a moisture content <0.02%; 2) Increase the back pressure 0.5-1MPa for venting; 3) Reduce the injection speed to avoid air entrapment; 4) Heat the hopper to prevent condensation of water vapor
핵심 요약
Silver streaks are caused by moisture vaporization and stretching; drying and venting are the main countermeasures
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