Injection Molding
3 조회수
PVC Nozzle Large Orifice
문제 현상
Frequent nozzle clogging, injection pressure fluctuation, and products show cold material and burnt coexisting
원인 분석
PVC's high viscosity requires a large-orifice nozzle to reduce shear; the nozzle orifice should be more than 30% larger than standard; small-orifice nozzles concentrate shear heat, and degradation and clogging occur alternately
해결 방법
①Enlarge the nozzle orifice by more than 30%; ②independently and precisely control nozzle temperature; ③regularly check carbon deposits in the nozzle cavity; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
핵심 요약
The large-orifice nozzle is a key detail for PVC shear prevention; the 30% enlargement margin is written into the equipment specification; 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!