Injection Molding
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TPE Short Shot
Problem Phenomenon
Product filling is incomplete.
Cause Analysis
Insufficient injection pressure and speed or low temperature; TPE flowability varies greatly with hardness, high hardness grades are harder to fill.; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
Solution
①Increase injection pressure and speed; ②appropriately raise temperature; ③select grades with matching flowability; ④enlarge the gate and runner.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Troubleshoot short shot by pressure, temperature and grade flowability; hardness and flowability must match the product.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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