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Counter-rotating twin screws help rigid PVC fuse without excessive shear heating. Their conveying and compression support steady melt delivery for pipe and profile dies.

A worn extruder screw may be rebuilt when its core and geometry remain sound. Map flight wear and cracks before deciding if refurbishment can safely restore clearance.

Bore wear in an injection plasticizing barrel increases clearance and melt backflow. Compare recovery time under fixed conditions and link shot variation to wear.

Bore wear in an injection plasticizing barrel increases clearance and melt backflow. Compare recovery time under fixed conditions and link shot variation to wear.

Recycled PE film can develop gels, odor and unstable output from both feedstock and extruder faults. Diagnose feeding first before checking venting and wear.

Raising PCR content can change screw torque, melt pressure and wear. Separate feedstock variation, moisture and contamination from mechanical deterioration.