Effect of processing on weld line strength in five thermoplastics
作者： R. Seldén
DOI: 10.1002/PEN.11663
关键词:
摘要: Weld line strength has been measured in five engineering thermoplastics. The effect of processing parameters was studied using experimental design. Four parameters-holding pressure, injection velocity, melt temperature, and mold temperature-were varied two levels. For each parameter setting the weld compared with bulk via a factor (WL-factor), defined as: specimens line/strength without line. Results from flexural tests on both filled unfilled materials showed that factors for cold lines between 0.25 0.98 depending material setting. Highest WL-factors were obtained high holding low temperature. instrumented falling weight impact sometimes WL-factor higher than 1.0. There generally poor correlation results tests.
cheric.org参考文章(15)
S. C. Malguarnera, A. Manisali, The effects of processing parameters on the tensile properties of weld lines in injection molded thermoplastics Polymer Engineering and Science. ,vol. 21, pp. 586- 593 ,(1981) , 10.1002/PEN.760211004
G. Mennig, ZUM EINFLUSS DES MOLEKULARGEWICHTS AUF DIE MAKROSKOPISCHE GRENZFLÄCHE BINDENAHT Angewandte Makromolekulare Chemie. ,vol. 185, pp. 179- 188 ,(1991) , 10.1002/APMC.1991.051850117
Ralf M. Criens, Impact strength of knit-lines in injection moulded parts Materials Chemistry and Physics. ,vol. 14, pp. 69- 83 ,(1986) , 10.1016/0254-0584(86)90019-2
G. Mennig, Die Bindenaht in der Kunststoffverarbeitung Materialwissenschaft Und Werkstofftechnik. ,vol. 19, pp. 383- 390 ,(1988) , 10.1002/MAWE.19880191106
V. M. Nadkarni, S. R. Ayodhya, The influence of knit-lines on the tensile properties of fiberglass reinforced thermoplastics† Polymer Engineering and Science. ,vol. 33, pp. 358- 367 ,(1993) , 10.1002/PEN.760330609
K. Engberg, A. Knutsson, P.-E. Werner, U. W. Gedde, Knit line fractures in injection molded liquid crystalline polymers Polymer Engineering and Science. ,vol. 30, pp. 1620- 1627 ,(1990) , 10.1002/PEN.760302411
B. Fisa, J. Dufour, T. Vu-Khanh, Weldline integrity of reinforced plastics: Effect of filler shape Polymer Composites. ,vol. 8, pp. 408- 418 ,(1987) , 10.1002/PC.750080607
S. Hashemi, J. G. Williams, Fracture from inherent flaws in polymers Journal of Materials Science. ,vol. 20, pp. 4202- 4208 ,(1985) , 10.1007/BF00552415
B. Fisa, M. Rahmani, Weldline strength in injection molded glass fiber‐reinforced polypropylene Polymer Engineering and Science. ,vol. 31, pp. 1330- 1336 ,(1991) , 10.1002/PEN.760311807
K. Tomari, S. Tonogai, T. Harada, H. Hamada, K. Lee, T. Morii, Z. Maekawa, The V-notch at weld lines in polystyrene injection moldings Polymer Engineering and Science. ,vol. 30, pp. 931- 936 ,(1990) , 10.1002/PEN.760301508