Injection Molding
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Feasibility Management of PVDF Powder Direct '2079851475616104452
Fenómeno do problema
【Problem phenomenon】Omitting pelletizing and directly '2079851475616104452 PVDF powder results in unmelted particles and batch fluctuations in products
Análise das causas
Direct powder molding reduces heat history and pelletizing cost but poses great challenges to plasticization uniformity; research shows that mechanical properties can be comparable to pellets, provided that screw plasticization and feeding are stably controlled
Solução
Equip powder feeding with forced metering and pre-drying; strengthen screw mixing and plasticization; perform full performance comparison verification on the first batch before switching; prevent moisture absorption and caking during powder storage and transport; After adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Direct powder injection saves heat history but is demanding on equipment; switch to mass production only after sufficient verification; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; Include this case in the defect archive as a reference for troubleshooting similar problems in the future
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