Processing Machinery
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Severe screw and barrel wear
Problem Phenomenon
A new screw shows obvious wear after only a few months of service, with clearance exceeding the standard
Cause Analysis
Glass fiber has extremely high hardness (Mohs 5-6) producing abrasive wear; at high temperature the metal surface hardness decreases, aggravating wear; when glass fiber content exceeds 30%, wear accelerates
Solution
Use bimetallic screw and barrel (tungsten carbide or boronized surface); regularly test the screw-barrel clearance (at least once a year); control the glass fiber filling amount ≤40%
Key Takeaway
Abrasive wear of equipment in LGFPP processing is a persistent engineering and technical challenge
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