Molds & Tooling
4 조회수
PP Gate Size Design
문제 현상
[Problem Phenomenon] PP gate too small causes insufficient feeding or too large leaves obvious marks
원인 분석
Gates are designed according to wall thickness: too small freezes early with insufficient feeding and sink marks; too large has small pressure loss but obvious marks; PP's high shrinkage needs a sufficiently large gate to ensure feeding; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
해결 방법
Gate size ensures the feeding channel; for sink mark parts check whether the gate is too small; submarine pin-point gates for appearance parts; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
PP gates must be large enough to feed the large shrinkage; submarine pin-point gates for appearance parts; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar future problems
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