在塑料注射模具设计过程中应用Taguchi方法减低翘曲
S.H. Tang＊, Y.J. Tan, S.M. Sapuan, S. Sulaiman, N. Ismail, R. Samin
Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia. Received 3 September 2004; received in revised form 27 July 2006; accepted 10 August 2006
摘要
塑料注射成型是当今塑料工业中最重要的聚合物加工方法之一。然而，模具制作技术与注射成型机控制技术的缺乏将导致生产出有缺陷的塑料产品。翘曲是通常出现在厚度不到1毫米的产品中的一类缺陷。
这次课题将制造一副模具用于生产尺寸为120mm×50mm×1mm的薄板。生产的薄板将用来做翘曲测试。在模具制造中，对购买的模具基本模块进行加工与组装。之后，将模具安装在注射成型机上。注射机设置成满足该产品生产要求的参数。然后，生产的产品将通过Taguchi方法的实验设计进行翘曲影响因素测试。
从结果中，可以看出翘曲的最大影响因素是熔化温度。填充时间对翘曲的影响很小。最大程度地减少翘曲缺陷的理想参数是熔化温度（240◦C），填充时间（0.5s）,锁模力（90%），锁模时间（0.6s）。
关键词：塑料注射模具；Taguchi方法；实验设计；翘曲
The use of Taguchi method in the design of plastic injection mould for reducing warpage
S.H. Tang ∗, Y.J. Tan, S.M. Sapuan, S. Sulaiman, N. Ismail, R. Samin
Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia. Received 3 September 2004; received in revised form 27 July 2006; accepted 10 August 2006
Abstract
Plastic injection moulding is one of the most important polymer processing operations in the plastic industry today. However, lack of skill in mould making and injection moulding machine control will lead to defective plastic product. Warpage is one type of defect that usually appears in products with thickness less than 1 mm.
This project is going to fabricate a mould that produced a thin plate with dimension 120mm×50mm×1 mm. The thin plate will be used for warpage testing. In mould fabrication, the mould base that purchase will be machined and assembled. After that, the mould is fixed on the injection moulding machine. The machine setting should be made to produce the product. Then, the product will be used for testing on the effective factors
in warpage problem by applying the experimental design of Taguchi method.
From the results, it shows that the most effective factor on the warpage is melt temperature. The filling time only slightly influenced on the warpage. The optimum parameters that can minimize the warpage defect are melt temperature (240 ◦C), filling time (0.5 s), packing pressure (90%) and packing time (0.6 s).
Keywords: Plastic injection mould; Taguchi methods; Experimental design; Warpage
