Molds & Tooling
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PP Glass Fiber Reinforced Processing
Problem Phenomenon
[Problem Phenomenon] Using the pure-material process for glass fiber PP, floating fiber and filling problems coexist
Cause Analysis
Glass fiber PP viscosity rises, requiring higher melt temperature and mold temperature; lower screw speed to protect fibers; wear requires wear-resistant configuration; shrinkage decreases but with anisotropy; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
Take the upper limit of melt temperature and mold temperature for glass fiber grades; reduce rotation speed; wear-resistant barrel; raise temperature first for floating fiber; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
For PP glass fiber material, upper-limit temperature and reduced speed, wear-resistant equipment; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar future problems
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