Molds & Tooling
5 조회수
Improper PPO Runner Design
문제 현상
PPO products have filling difficulties and pressure loss due to excessively long and thin runners, cold slugs entering the cavity cause defects, and the sprue is difficult to demold.
원인 분석
The high viscosity of PPO requires short and thick runner design; the sprue should adopt a larger taper or a sprue puller structure; when hot runners are not used for long runners, cold slug problems are prominent; a straight-through nozzle with a bore of 3~6mm is preferable.
해결 방법
①Design runners according to the short and thick principle; ②large taper or sprue puller for the sprue; ③adopt hot runner structure for long runners; ④select a straight-through nozzle with a bore of 3~6mm.
핵심 요약
PPO runner design has clear industry norms; short and thick runners reduce pressure loss; hot runners have significant value for long-flow parts.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!