Processing Machinery
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Frequent screen change/short filter screen life of linear low density polyethylene extruder (Variant: strengthened measures)
Problem Phenomenon
Filter screens clog after short use and need frequent replacement.
Frequent screen changes affect production efficiency and also reflect high impurity content in raw material or improper process parameters.
In particular, additional attention is needed on the original basis; this problem is more prominent and requires key attention.
Cause Analysis
(1) High impurity content in raw material
(2) Regrind contains carbides or other impurities
(3) Barrel temperature too high, material partially carbonized
(4) Filter screen mesh count too high or too many layers
(5) Uneven filler dispersion in raw material forming agglomerates
(6) On the original basis, additional attention is needed as process parameter fluctuations or equipment status changes have aggravated this problem
Solution
(1) Strengthen raw material screening and impurity removal, install magnetic grate on the hopper
(2) Sieve regrind before use to remove carbides
(3) Control barrel temperature within the 190-250°C range, avoid overheating carbonization
(4) Select filter screens with appropriate mesh count, generally 40-80 mesh
(5) Optimize raw material formulation, ensure uniform filler dispersion
(6) Consider using automatic screen changers to reduce downtime
(6) And strengthen process monitoring; on the original basis, additional attention is needed, with special attention to parameter stability
Key Takeaway
Frequent filter screen clogging is caused by raw material impurities or improper process; it needs to be solved from raw material management and temperature control.
Targeted preventive measures need to be taken in different production scenarios.
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