Processing Machinery
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Frequent Screen Change/Short Filter Screen Life of Polypropylene Extruder
Problem Phenomenon
The filter screen becomes clogged after a short use time and needs to be replaced frequently.
Frequent screen changes affect production efficiency and also reflect high impurity content in the raw material or improper process parameters.
Cause Analysis
(1) The impurity content in the raw material is high
(2) The regrind contains carbonized matter or other impurities
(3) The barrel temperature is too high, and the material is partially carbonized
(4) The filter screen mesh is too high or there are too many layers
(5) The filler in the raw material is unevenly dispersed, forming agglomerates
Solution
(1) Strengthen raw material screening and impurity removal, and install a magnetic frame on the hopper
(2) Sieve the regrind before use to remove carbonized matter
(3) Control the barrel temperature within the range of 200-280°C to avoid overheating carbonization
(4) Select a filter screen with a suitable mesh, generally 40-80 mesh
(5) Optimize the raw material formulation to ensure uniform filler dispersion
(6) Consider using an automatic screen changer to reduce downtime
Key Takeaway
Frequent filter screen clogging is caused by raw material impurities or improper process, and needs to be solved from raw material management and temperature control.
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