Extrusion & Post
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Poor dimensional accuracy of PET extruded profiles
Problem Phenomenon
Large cross-section dimensional fluctuation of PET extruded profiles, difficult to meet precision assembly requirements.
Cause Analysis
Unstable extruder output (rotation speed fluctuation or uneven feeding), insufficient or uneven sizing die cooling, unstable haul-off speed.
Solution
Use metering feeding device to stabilize supply; optimize sizing die cooling design; precisely control haul-off speed (closed-loop servo); stabilize extrusion temperature ±2°C.
Key Takeaway
PET profile dimensional accuracy requires stable control of the entire process.
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