摘要
聚合物象聚丙烯或者聚乙烯在为汽车生产一个整体或者单独铰链时表现出一个独特的特征，能曲屈超过100万次而不引起一次失败。在浇口位置选择不恰当时由于充模时在铰链处的流动性抵抗增加，一些缺陷例如充模不足或者过早损坏能够发生。在这篇文章里，设计指南通过调查树脂的流动类型被推断出来，树脂的流动类型取决于几个浇口位置，这些是在一简单带和一副铰链的数值分析的基础上获得的。一旦树脂在铰链处在一段足以使树脂被凝固的时间内没有流动，充模不足或者踌躇那样的缺陷就形成了。因此设计指南的一个实际应用被决定用在一个汽车分线盒的4个浇口系统的设计上。发现正确地决定浇口位置会产生更好的树脂流动和更短的踌躇时间。最后，注射成型试验使用了一个被提议的浇口系统设计的模具。试验显示没有缺陷的铰链可以通过正确设计浇口得到，这些证实了推断出来设计指南的合理性。
......

不存在

参考文献：
[1] J. Frados, Plastics Engineering Handbook, Van Nostrand, New York,
1976.
[2] R.A. Malloy, Plastic Part Design for Injection Molding, Carl Hanser,
New York, 1994.
[3] P.A. Tres, Designing Plastic Parts for Assembly, Carl Hanser, New
York, 1994.
[4] R.K. Irani, B.H. Kim, J.R. Dixon, Toward automated design of the
feed system of injection molds by integrating CAE, iterative redesign
and features, J. Eng. Ind. Trans. ASME 117 (1995) 72-77.
[5] W.G. Ryim, Y.I. Kim, S.K. Chang, A systematic optimization of gate
location and processing conditions in injection molding, J. Appl.
Mech. Trans. ASME 227 (1997) 111-120.
[6] Y.C. Lam, S. Jin, Optimization of gate location for plastic injection
molding, J. Inj. Mold. Technol. 5 (2001) 180-192.
[7] P. Kennedy, Flow Analysis Reference Manual, Moldflow Pvt. Ltd.,
Australia, 1993.
[8] I. Pandelidis, Q. Zou, Optimization of injection molding design. Part
I. Gate location optimization, Polym. Eng. Sci. 30 (1990) 873-882.
[9] I. Pandelidis, Q. Zou, Optimization of injection molding design. Part
II. Molding conditions optimization, Poly. Eng. Sci. 30 (1990) 883-
892.
[10] L.W. Seow, Y.C. Lam, Optimizing flow in plastic injection molding,
J. Mater. Process. Technol. 72 (1997) 333-341.
[11] L. Sors, L. Bardocz, I. Radnoti, Plastic Molds and Dies, Van Nostrand,
New York, 1981.
[12] V.H. Rhodes, Processing effects on hinge life of injection molded
styrene-butadiene copolymers, in: Proceeding of ANTEC ’99, vol.
1, 1999, pp. 733-736.