Weld‐lines and its strength evaluation in injection molded parts: A review
Injection molding manufacturing is immensely popular nowadays because of its excellent manufacturability for complex designs produced from a wide range of different engineering plastic materials. Weld-line is a defect that arises in injection molding when two or more flow fronts collide. The weld-li...
Gespeichert in:
Veröffentlicht in: | Polymer engineering and science 2023-11, Vol.63 (11), p.3523-3536 |
---|---|
Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Injection molding manufacturing is immensely popular nowadays because of its excellent manufacturability for complex designs produced from a wide range of different engineering plastic materials. Weld-line is a defect that arises in injection molding when two or more flow fronts collide. The weld-lines are undesirable from both aesthetic and functional points of view and their effect is different for varied materials, process conditions, loadings, forms of weld-line, etc. The presence of a weld-line weakens components locally due to insufficient intermolecular diffusion, v-notch formation, fiber anisotropy, insufficient process conditions, and so on. When a component is under load, crack propagation usually begins with a weak weld-line area. Therefore, the designer should anticipate the presence of weld-lines and their strength to avoid failure of components during operation. In this article, the review of published research work on weld-line formation during injection molding has been summarized. The review focuses on the phenomenon of weld-line formation, the type of weld-lines, and the importance of weld-line evaluations. The theoretical, experimental, and computational approaches to analyzing weld-line and its strength are covered in detail. At last, methods for reducing weld-lines and increasing the strength of weld-line area have been discussed. This review also gathers data on weld-line strength with respect to different materials. |
---|---|
ISSN: | 0032-3888 1548-2634 |
DOI: | 10.1002/pen.26470 |