Extrusion & Post
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Snakeskin Pattern on CMC Surface
Problem Phenomenon
Snakeskin-like irregular texture on the surface of CMC extruded products
Cause Analysis
Extrusion temperature is low and melt elastic recovery is uneven; die temperature distribution is uneven
Solution
1)Increase extrusion temperature to the processing temperature range; 2)Homogenize die temperature ±2°C; 3)Reduce extrusion rate to reduce elastic recovery
Key Takeaway
Snakeskin pattern is caused by low-temperature extrusion and elastic recovery; temperature increase and speed reduction are the key
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