Extrusion & Post
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TPE extrusion die buildup
Fenómeno del problema
Deposits retained at the edge of the TPE extrusion die, lines appear on the product surface
Análisis de la causa
Causes of TPE die buildup: material dampness, inherent material characteristics, excessive filling oil; deposits periodically fall off and enter the product forming defects; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
①fully dry the material; ②add external lubricant; ③apply Teflon coating on the die to prevent sticking; 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
Conclusión clave
TPE die buildup is a dual signal of drying and formulation; Teflon coating is an effective hardware countermeasure; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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