Injection Molding
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TPE injection pressure 2-3 tons
Problem Phenomenon
Thin-walled parts are underfilled, or excessive pressure causes flash and internal stress
Cause Analysis
TPE injection pressure is calculated at 2-3 tons per square inch of clamping force; insufficient pressure causes short shot, excessive pressure causes flash; for overmolded parts the pressure must also consider the bonding with the hard plastic
Solution
①injection pressure is calculated at 2-3 tons per square inch; ②appropriately increase for thin-walled parts; ③reduce pressure when flash occurs; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
TPE pressure setting has a clear formula; 2-3 tons per square inch is the balance benchmark between clamping force and injection pressure; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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