Extrusion & Post
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TPE extrusion deformation
Problem Phenomenon
TPE extruded products deform, cooling is uneven, and double-layer extrusion shrinks differently
Cause Analysis
Causes of TPE extrusion deformation: uneven cooling, double-layer extrusion with different shrinkage rates; slow curing speed, mismatched haul-off speed; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①uniform cooling; ②adjust shrinkage rate matching; ③increase curing speed; 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
Key Takeaway
TPE extrusion deformation is troubleshooted along the three lines of cooling, shrinkage, and curing; shrinkage matching of double-layer extrusion is a special consideration; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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