Molding Process
4 조회수
PET Bottle Neck Crystallization (White Neck)
문제 현상
White ring band below the bottle neck.
원인 분석
The neck area is heated (lamp too close to the neck or insufficient protection) causing crystallization; affecting sealing and strength.
해결 방법
①Check neck shading/cooling protection; ②adjust the distance and power of the top lamp zone; ③check preform neck cooling.
핵심 요약
White neck = heat protection failure.
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