Processing Machinery
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HDPE film recycled material bridging
Problem Phenomenon
After blending crushed recycled material, the feeding is unstable, the output fluctuates and even the material supply is interrupted.
Cause Analysis
Crushed film flakes (fluff) have low bulk density and bridge and slip in the feeding section of the screw; the problem intensifies when the proportion of recycled material is high.; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①Drill a hole at the front end of the screw and water-cool the first 3~5 flights; ②control the blending ratio of recycled material; ③use a densifier to increase the density of the recycled material; ④monitor the feeding stability.
Key Takeaway
Recycled material bridging is a physical feeding obstacle; feeding section modification and densification treatment are common countermeasures.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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