Extrusion & Post
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Unreasonable temperature settings in each zone affect plasticization and extrusion quality
Problem Phenomenon
Unreasonable temperature settings in each zone affect plasticization and extrusion quality
Cause Analysis
Feed zone temperature too high, raw material softens too early and bridges
Compression zone temperature insufficient, plasticization insufficient
Metering zone temperature too high, melt overheated and degraded
Die temperature uneven, extruded product defects
Cellulose acetate butyrate extrusion zones need to be set according to the 170-230°C gradient
Solution
Feed zone temperature on the low side to prevent bridging
Compression zone temperature moderate to ensure plasticization
Metering zone temperature on the high side but not exceeding the upper limit of 170-230°C
Die temperature uniformly controlled
Set the temperature gradient of each zone according to cellulose acetate butyrate characteristics
Key Takeaway
Extrusion temperature needs to be reasonably set for each zone according to the gradient
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