Molds & Tooling
1 views
PMMA Multi-Cavity Transparency Inconsistency
Problem Phenomenon
Products from each cavity of a multi-cavity mold have inconsistent transparency and stress levels.
Cause Analysis
Imbalanced runners and cooling among cavities cause different filling shear and cooling rates; hot runner temperature differences also change the melt state of each cavity.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.
Solution
①Balance runners and cooling; ②calibrate hot runner temperatures at each point; ③test optical indicators cavity by cavity; ④optimize process by cavity position.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
The balance requirement of optical multi-cavity molds is higher than for ordinary parts; cavity-by-cavity optical testing is a direct means to verify balance.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
Was this helpful?
0 people found this helpful
Thank you for your feedback!