Material Drying
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ASA winter production defects increase
Fenómeno do problema
ASA winter workshop production defect rate rises significantly, silver streaks, insufficient filling and brittleness problems concentrate, while the same process runs normally in summer.
Análise das causas
Winter ambient temperature is low, raw material initial temperature is low and moisture condensation is easy; barrel heat dissipation is fast and actual temperature is low; mold heats up slowly and defects concentrate in the first few shots; workshop humidity changes affect drying effect.
Solução
①Winter barrel temperature increased by 5~10°C compared with summer for compensation; ②raw material preheating and strengthened drying management; ③mass production after the mold is fully preheated; ④workshop temperature and humidity control with environmental parameter recording.
Conclusão principal
ASA winter defects are the result of chain effects of environmental temperature; seasonal process adjustments should be standardized; environmental parameter records help abnormality tracing.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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