Injection Molding
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TPE burnt and air traps
Problembeschreibung
Charring and discoloration at the product end, carbon deposit at the corresponding mold position, poor venting
Ursachenanalyse
TPE burnt originates from insufficient venting: adiabatic compression of air causes a sharp temperature rise; excessive injection speed aggravates it; ends and rib positions are high-incidence areas; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Lösung
①improve venting methods; ②reduce injection speed; ③add vent grooves at ends and rib positions; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate effective measures
Wichtigste Erkenntnis
TPE burnt treatment prioritizes venting; speed control is a supporting means, and carbon deposit cleaning is routine maintenance; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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