Molding Process
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Rough surface of cable insulation layer
Problem Phenomenon
Sharkskin defects appear on the extruded insulation layer
Cause Analysis
The processing temperature is too low, melt fracture, and the die is not smooth
Solution
Raise the temperature to 250-260C, polish the die, and reduce the line speed
Key Takeaway
The temperature and shear rate need to be precisely controlled
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