Processing Machinery
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Accelerated screw wear of glass fiber reinforced PC
Problem Phenomenon
After processing GF-PC, the screw and non-return ring wear quickly, metering fluctuates, and part quality is unstable.
Cause Analysis
Glass fiber strongly wears metal, and ordinary nitrided screws have a short life; after wear, plasticization and metering are unstable and part quality fluctuates; the higher the GF content, the faster the wear; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone.
Solution
①For GF-PC, use bimetallic/hardened screw and barrel; ②regularly check the non-return ring clearance; ③monitor the trend of plasticizing time changes; ④establish a replacement cycle for wearing parts; ⑤evaluate screw material upgrade.
Key Takeaway
GF material 'must be equipped with a wear-resistant plasticizing system': glass fiber is an abrasive, ordinary screws cannot withstand it; hardware upgrade is more economical than repairing quality afterwards, and the plasticizing time trend is an early warning of wear.
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