塑料注射模外文翻譯--塑料注塑模具設計中使用田口方法減少翹曲（英文）

1、Journal of Materials Processing Technology 182 (2007) 418–426The use of Taguchi method in the design of plastic injection mould for reducing warpageS.H. Tang ?, Y.J. Tan, S.M. Sapuan, S. Sulaiman, N. Ismail, R. SaminDepa

2、rtment of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, MalaysiaReceived 3 September 2004; received in revised form 27 July 2006; accepted 10 August 2006AbstractPlastic inj

3、ection 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 produ

4、ct. 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 120 mm × 50 mm × 1 mm. The

5、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

6、 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 effe

7、ctive 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),

8、packing pressure (90%) and packing time (0.6 s). © 2006 Elsevier B.V. All rights reserved.Keywords: Plastic injection mould; Taguchi methods; Experimental design; Warpage1. IntroductionMould making is an important s

9、upporting industry because their related products represent more than 70% among the com- ponents in consumer products. The high demand for shorter design and manufacturing lead times, good dimensionality and overall qual

10、ity, and rapid design changes has become the bottle- necks in mould industries [1]. It is a complicated process, and required skilled and experienced mould maker. Generally, injection moulding is one of the most importan

11、t polymer processing operations in the plastic industry today. Approximately one-third of all plastics are converted into parts using injection moulding [2]. This is one of the processes that are greatly preferred in man

12、ufacturing industry because it can produce complex-shape plastic parts with good dimensional accuracy and very short cycle times [3]. Typical examples are casings and housings of the products such as computer monitor and

13、 mobile telephone, which have a thin shell feature. These? Corresponding author. E-mail address: saihong@eng.upm.edu.my (S.H. Tang).products tend to become lighter, thinner and smaller. Hence, the internal components of

14、products have to be packed into hous- ing, which has smaller volume. One way to increase the space of housing parts is to reduce the wall thickness. However, the injection moulding operation becomes more difficult as the

15、 wall thickness of plastic parts becomes thinner [4]. This is because the significant warpage defect will be appeared. To reduce this significant defect, testing procedure regarding to the effective factors is required.

16、A thin plate with dimension 120 mm × 50 mm and 1 mm thickness will be produced. It is use for testing on the effec- tive factors to minimize the warpage defect. Firstly, fabricating the plastic injection mould is ne

17、eded. After that, the mould is going to be assembled on the injection moulding machine. When the thin plates have been produced, they will be used for test- ing on the effective factors in warpage problem by applying the

18、 experimental design of Taguchi method.2. PreparationIn fabricating the mould, some preparations are needed. The capability of the machine that are available in faculty are0924-0136/$ – see front matter © 2006 Elsev

19、ier B.V. All rights reserved. doi:10.1016/j.jmatprotec.2006.08.025420 S.H. Tang et al. / Journal of Materials Processing Technology 182 (2007) 418–426Fig. 3. Configuration of cooling channel for core plate.4. Mould fabri

20、cationThere are some parts in the mould that need to be machined. It involved high precise and accuracy process. Hence, it is required skilled mould maker. Following is the machining process for every part of the mould.4

21、.1. Top clamping platePart 1: Ream through hole with 16 mm diameter (drilling machine)Operation descriptions ToolsStep 1 Marking the point Height gauge Step 2 Clamping the plate on the machine table Step 3 Centering at t

22、he marking point Center drill Step 4 Drilling through hole ?15.5 drill Step 5 Reaming the hole ?16 reamerTool, high speed steel; spindle speed, 330 rpm. Part 2: Tap M6 holes (drilling machine)Operation descriptions Tools

23、Step 1 Marking the point Height gauge Step 2 Clamping the plate on the machine table Step 3 Centering at the marking point Center drill Step 4 Drilling 2 holes with 12 mm depth ?5 drill Step 5 Tapping the holes M6 tapper

24、Tool, high speed steel; spindle speed, 1000 rpm. Part 3: Enlarge hole to 40 mm diameter with 14.8 mm depth (milling machine)Operation descriptions ToolsStep 1 Marking ?35 and ?40 circles Compass Step 2 Clamping the plate

25、 on the machine table Step 3 Milling the area at ?35 circle with 14.8 mm depth ?10 endmill Step 4 Boring until ?40 circle with 14.8 mm depth BorebitTool, high speed steel; spindle speed, 820 rpm; depth of cut, 2 mm for r

26、oughing and 0.8 mm for finishing.Fig. 4 shows the parts of the top clamping plate that need to be machined. Note that the first step in Part 1, Part 2 and Part 3Fig. 4. Parts of the top clamping plate that need to machin

27、e.which are marking point and marking circle is done at the same time before proceed to next step.4.2. Cavity platePart 1: Ream through hole with 16 mm diameter (drilling machine)Operation descriptions ToolsStep 1 Markin

28、g the point Height gauge Step 2 Clamping the plate on the machine table Step 3 Centering at the marking point Center drill Step 4 Drilling through hole ?15.5 drill Step 5 Reaming the hole ?16 reamerTool, high speed steel

29、; spindle speed, 330 rpm. Part 2: Drill through holes with 8 mm diameter (drilling machine)Operation descriptions ToolsStep 1 Marking the point Height gauge Step 2 Clamping the plate on the machine table Step 3 Centering

30、 at the marking point Center drill Step 4 Drilling 2 holes until half width of the plate ?8 drill Step 5 Turn the plate to opposite side Step 6 Clamping the plate on the machine table Step 7 Centering at the marking poin

31、t Center drill Step 8 Drilling 2 through holes ?8 drillTool, high speed steel; spindle speed, 640 rpm. Part 3: Tap 1/4?? holes (drilling machine)Operation descriptions ToolsStep 1 Clamping the plate on the machine table

32、Step 2 Drilling 2 holes with 15 mm depth ?11 drill Step 3 Tapping the holes 1/4?? tapper Step 4 Turn the plate to opposite side Step 5 Clamping the plate on the machine table Step 6 Drilling another 2 holes with 15 mm de