Processing Machinery
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Random copolymer polypropylene pipe special material (Nordic standard） extruder frequent screen change/short filter screen life
Fenómeno do problema
The filter screen becomes clogged after a short time of use and needs frequent replacement.
Frequent screen changes affect production efficiency, and also reflect high impurity content in the raw material or improper process parameters.
Análise das causas
（1）The impurity content in the raw material is high\
（2）The regrind contains carbides or other impurities\
（3）Barrel temperature too high, material partially carbonized\
（4）The filter screen mesh count too high or too many layers\
（5）Fillers in the raw material unevenly dispersed forming agglomerates
Solução
（1）Strengthen raw material screening and impurity removal, install a magnetic rack on the hopper\
（2）Sieve the regrind before use to remove carbides\
（3）Control the barrel temperature within the 200-220°C range to avoid overheating carbonization\
（4）Select a filter screen with a suitable mesh count, generally 40-80 mesh\
（5）Optimize the raw material formulation, ensure uniform filler dispersion\
（6）Consider using an automatic screen changer to reduce downtime
Conclusão principal
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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