Molds & Tooling
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ASA melt temperature too low poor filling
Fenómeno do problema
ASA product shows insufficient mold filling, flow marks and cold slug marks, poor surface gloss and darkening, defects concentrated in thin-wall areas and flow ends.
Análise das causas
When melt temperature is low, ASA fluidity is insufficient and the melt front condenses in advance; flow marks and cold slug marks are typical morphologies of low-temperature filling; product dimensional stability also deteriorates accordingly.
Solução
①Raise melt temperature to the upper side within the 190~230℃ process range; ②adopt layered temperature control, with 10~15℃ stepped temperature rise between sections; ③cooperate with increasing injection speed; ④raise mold temperature appropriately in sync.
Conclusão principal
ASA low-temperature defects are opposite in direction to high-temperature degradation, requiring two-way balance; layered temperature control avoids local overheating while ensuring plasticization; each temperature adjustment should not exceed 10℃.
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