Extrusion & Post
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Uneven Surface of Acrylonitrile-Butadiene-Styrene Copolymer Extruded Plate
Problem Phenomenon
Unevenness appears on the surface of the extruded plate, affecting product appearance and subsequent processing quality.
This problem is common in acrylonitrile-butadiene-styrene copolymer extrusion production.
Cause Analysis
(1) The extrusion temperature (220-260°C) is set improperly, and the melt quality is unstable
(2) The screw speed and haul-off speed are improperly matched
(3) Die condition or design problems
(4) The cooling system is set improperly
(5) Raw material quality or pretreatment problems
Solution
(1) Optimize the extrusion temperature to a reasonable value within the range of 220-260°C
(2) Stabilize the screw speed and haul-off speed
(3) Check the die condition, clean the accumulated material or repair damage
(4) Adjust the cooling water temperature and flow
(5) Ensure the raw material is dry (70-80°C, 3-4h) and clean
Key Takeaway
Extrusion surface defects need to be controlled from three aspects: temperature, speed, and die condition.
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