Molds & Tooling
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ASA glass fiber grade temperature adjustment
Problem Phenomenon
[Problem phenomenon] Glass fiber reinforced ASA follows pure material process, floating fibers and filling problems coexist
Cause Analysis
Glass fiber grades have increased viscosity requiring higher melt temperature and mold temperature to ensure flow wetting; but excessive temperature damages the fiber-matrix interface, the window is narrower than pure material; during on-site investigation, verify item by item according to this mechanism, avoid blindly adjusting the machine based on experience alone
Solution
Glass fiber grade melt temperature and mold temperature take window upper limit; screw speed reduced to preserve fiber length; when floating fibers occur, raise temperature first then speed; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA glass fiber material temperature takes upper limit speed reduced, floating fibers first check temperature; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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