Molds & Tooling
2 Aufrufe
White Stress Marks on PEEK Surface
Problembeschreibung
White stress marks appear at ejection or assembly-stressed locations of PEEK products, common at deep-cavity corners and ejector pin positions, affecting appearance and strength evaluation.
Ursachenanalyse
Local stress exceeding material yielding causes microscopic crazing, and light scattering appears white; concentrated ejection force, unsmooth demolding, and assembly interference are typical inducements; when crystallization is insufficient, the material is more prone to stress whitening.
Lösung
①Optimize the ejection layout to distribute the ejection force; ②Check draft angle and polishing to eliminate sticking; ③Ensure sufficient mold temperature for complete crystallization to improve toughness; ④Design the assembly structure to avoid interference stress.
Wichtigste Erkenntnis
PEEK stress whitening is a direct signal of local overload; check both the de'2079851475616104453 and the crystallization state; white-marked areas should be evaluated as key strength weak points.
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!