Processing Machinery
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TPE Weld Line
Problem Phenomenon
Weld lines appear on the product surface with low strength.
Cause Analysis
When two melt fronts converge, the temperature is low and fusion is poor; TPE softness makes the weld line appearance relatively inconspicuous but strength is still affected.; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
Solution
①Raise melt and mold temperature; ②optimize gate position; ③increase convergence speed; ④set venting at the convergence.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
TPE weld line strength management is the same as other materials; temperature and gate are the main means.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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