Molds & Tooling
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ASA melt temperature too low poor filling
Problem Phenomenon
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.
Cause Analysis
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.
Solution
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.
Key Takeaway
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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