Molds & Tooling
5 views
ASA Weld Line Visible on Dark Color
Problem Phenomenon
【Problem Phenomenon】Weld lines on ASA dark-colored products are particularly obvious, affecting appearance acceptance
Cause Analysis
Weld lines have strong visual contrast on dark-colored products; insufficient convergence front temperature and poor venting weaken bonding and amplify color difference; Plasthub suggests raising melt temperature and speed to improve
Solution
Increase melt temperature and injection speed to promote convergence fusion; mold temperature at upper limit; gate layout moves weld line to non-appearance area; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA dark part weld lines rely on temperature, speed plus relocation, three approaches simultaneously; 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 subsequent similar problems
Was this helpful?
0 people found this helpful
Thank you for your feedback!