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