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