Molds & Tooling
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ABAK dimensional stability improvement
Problembeschreibung
ABAK replaces pure PA to solve dimensional instability problems, but shrinkage management of the alloy itself still requires attention.
Ursachenanalyse
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.
Lösung
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
Wichtigste Erkenntnis
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
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