Molds & Tooling
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Mold Venting for PS Products
Problem Phenomenon
Trapped air burning on transparent parts affects appearance.
Cause Analysis
Poor venting causes gas to burn due to adiabatic compression; transparent parts have zero tolerance for burn marks.; During on-site troubleshooting, verify item by item according to this mechanism, avoiding blindly adjusting the machine based solely on experience; This mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solution
①Improve the venting system; ②Focus on venting at the end of fill; ③Assist by reducing speed; ④Regularly clean vent grooves.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Venting design for transparent parts must be more adequate; burn marks are the indication for adding venting.; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence; Include this case in the defect archive as a reference for troubleshooting similar problems in the future
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