Molds & Tooling
8 views
ABAK dimensional stability improvement
Problem Phenomenon
ABAK replaces pure PA to solve dimensional instability problems, but shrinkage management of the alloy itself still requires attention.
Cause Analysis
Pure PA has a high water absorption rate, causing dimensional expansion of 1~2% and fluctuation of mechanical properties; ABAK alloy utilizes the low water absorption characteristics of ABS to improve dimensional stability; however, the alloy shrinkage rate of 0.6~1.0% still requires mold compensation; there are still slight changes after water absorption.
Solution
①Utilize the low water absorption advantage of the alloy; ②design the mold according to a 0.6~1.0% shrinkage rate; ③leave mold correction allowance for critical dimensions; ④verify dimensions in wet state.; After adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
ABAK dimensional stability is a significant improvement over pure PA; however, precise management of shrinkage and water absorption is still necessary; wet-state verification covers the service environment.; After confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
Was this helpful?
0 people found this helpful
Thank you for your feedback!