Extrusion & Post
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Unstable feeding in EAA extrusion
Problem Phenomenon
The feeding amount of EAA extrusion fluctuates ±15%, causing unstable extrusion pressure and product dimensions
Cause Analysis
Irregular shape of EAA granules causes unstable filling rate of the feeding screw; bridging or voids in the hopper; unsuitable feeding screw design
Solution
1) Use a loss-in-weight feeder to precisely control the feeding amount; 2) Install a vibrator on the hopper to prevent bridging; 3) Granulate EAA to a uniform particle size of 2-3mm; 4) Change the feeding screw to a dedicated design
Key Takeaway
Unstable feeding is caused by granule characteristics; loss-in-weight feeding and anti-bridging are the core
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