Extrusion & Post
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HDPE extrusion head pressure fluctuation
Problem Phenomenon
The head pressure gauge needle fluctuates, and product dimensions fluctuate accordingly.
Cause Analysis
Unstable feeding, screw wear, screen blockage, or temperature fluctuation cause melt pressure pulsation.
Solution
①Check feeding and hopper cooling; ②measure the screw gap; ③replace the screen; ④stabilize temperature control.
Key Takeaway
Tracing pressure fluctuation: material, screw, screen, temperature.
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