Molds & Tooling
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POM Short Shot Troubleshooting
Problem Phenomenon
Thin-walled parts are underfilled; after raising temperature and pressure, short shots persist and flash begins to appear
Cause Analysis
For POM short shots, check feeding and equipment first: hopper bridging, check valve leakage, and unstable cushion all make the actual shot volume insufficient; poor venting also causes end underfill
Solution
①Eliminate hopper bridging and maintain a stable cushion; ②repair check valve leakage; ③increase injection rate and check venting and gate size; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
POM short shot troubleshooting goes equipment first, process second; the three checks of bridging, check valve, and cushion are the fixed opening moves; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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