Processing Machinery
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Frequent screen change/short filter screen life of random copolymer polypropylene pipe special material extruder (Variant: strengthened measures)
Problem Phenomenon
The filter screen is blocked 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.
In particular, extra attention is needed on the original basis, this problem is more prominent and needs key attention.
Cause Analysis
（1）The impurity content in the raw material is high
（2）The regrind contains carbonized material 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 fillers in the raw material are unevenly dispersed to form agglomerates
（6）On the original basis, extra attention is needed: process parameter fluctuations or equipment status changes have aggravated this problem
Solution
（1）Strengthen the screening and impurity removal of raw materials, and install a magnetic frame on the hopper
（2）Sieve the regrind before use to remove carbonized material
（3）Control the barrel temperature within the range of 200-220°C to avoid overheating and 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
（6）And strengthen process monitoring; on the original basis, extra attention is needed, with special attention to parameter stability
Key Takeaway
Frequent filter screen blockage is caused by raw material impurities or improper process, and needs to be solved from raw material management and temperature control.
In different production scenarios, targeted preventive measures need to be taken.
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