CAE technology for injection mould - 注塑模CAE技术.doc
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1、Injection Molding CAE Technology0 Introduction Plastic products from product design to production, including molding plastic products design, mold design, mold manufacturing and injection molding process parameters and several other main areas. The traditional injection mold design mainly rely on th
2、e designers experience, while the injection molding process is very complex, plastic melt flow properties of different and ever-changing products and die structure, process conditions vary, forming various defects, mold design often require repeated trial-mode, maintenance mode can be put into produ
3、ction, with little of a successful, identify problems, not only to re-adjust the process parameters, or even to modify the plastic products and molds, not only time-consuming and laborious, but also reduces product development time . The use of injection molding CAE technology in mold manufacturing
4、prior to simulate injection molding process (including filling, packing and cooling) and the early detection of problems, optimize mold design and process conditions set to reduce the number of test mode in order to improve production efficiency, has become a injection molding technology is an impor
5、tant direction of development. 1 The history of Injection Molding CAE technology Injection Molding CAE technology is based on plastics processing rheology and heat transfer of the basic theory, the melt in the mold cavity in the flow, heat transfer physics, mathematical model, using numerical soluti
6、on method of constructing the theory, the use of computer visualization technology image, visually simulate the dynamics of the actual shape of the melt filling and cooling process, an analysis techniques. The 20th century, 60 years, the United Kingdom, the United States and Canada and other countri
7、es of the scholars, such as JRPearson (United Kingdom), JFStevenson (America), MRKamal (Canada) and KKWang (America), etc. to carry out a series of plastic melt in the mold-type cavity flow and cooling of basic research. At a reasonable simplification, based on 60 years completed a one-dimensional f
8、low and cooling analysis programs, 70 years to complete the two-dimensional cooling analysis programs, and 80 years from the injection molding CAE technology has begun to theoretical research into the practical phase, launched a three-dimensional flow and cooling analysis and the study extended to p
9、acking, fiber orientation and warpage prediction of molecular and other fields. After 90 years carried out into the flow, packing, cooling and stress analysis, the whole process of injection molding processes are integrated research. CAE technologies, for the injection mold design provides a reliabl
10、e guarantee that its application is mold design in the history of a major change. 2 The role of Injection Molding CAE technology It shows the design of injection molds using traditional methods and the use of injection molding CAE technical design features and differences in mold. It can be seen usi
11、ng traditional methods of design of injection mold design success will rely heavily on the experience of designers, but also for complex parts gate position is reasonable or not, the location of the exhaust slot settings, to determine the location of weld lines and so very difficult. Die in delivery
12、 will normally take before the test mode after repeated changes, until the products have been qualified, which inevitably led to the extension of the production cycle, and generally difficult to obtain an optimal design and process parameters. The use of injection molding CAE technical design, mold
13、is not true, because of mold design concept stage, can make use of CAE technology in injection molding process simulation flow, making usually only in the mold tryout phases in order to find problems, such as short shots, weld lines or holes appear in the surface appearance of parts and other issues
14、 have been avoided. While helping the designer to complete the balance of the system, such as flow channel design, exhaust ducts, setting, rationally determine the injection molding process parameters, etc., so that usually makes the modification must be repeated tryout to determine structural param
15、eters of the mold die design and process parameters in the conceptual stage able to determine, reduce the mold design and manufacturing cycle and improve the mold design quality. Therefore, the role of injection molding CAE software, mainly as follows: (1) Optimize design of plastic products Plastic
16、 wall thickness, gate number and location of the design of flow channel system for the quality of plastic products have a significant impact. Depends on the experience of the past, designers using manual methods to achieve, time-consuming effort, but the use of CAE technology to quickly design the b
17、est products. (2) optimize the plastic mold design Can be cavity size, gate location and number of flow channel dimensions and cooling systems to optimize the design. On the computer simulation test mold, mold repair mold and improve quality and reduce the number of actual tryout. (3) to optimize in
18、jection process parameters Simulation of the injection process and found possible shape defects, to determine the best injection pressure, clamping force, mold temperature, melt temperature, injection time and cooling time. This shows that the injection molding CAE technology in terms of improving p
19、roductivity, reduce mold design and manufacture cycle and to ensure product quality, or reduce costs, reduce labor intensity and so on, have very significant technical advantages and economic significance. 3 Injection Molding CAE software types and their details To date, a mature business are more i
20、njection molding CAE software, Moldflow Corporation Moldflow software and AC-Tech, Inc. (February 2000, was Moldflow Merger) and C-Mold software is an excellent representative; There are also foreign The TMCONCEPT, CADMold, Fidap, Stirm100, Polyflow and Chinas Taiwan region Moldex-peer software appl
21、ications are relatively wide; and domestic in the Eighth Five-Year period began research in this area, and now Huazhong University of Technology HSCAE software and Zhengzhou University, Z -Mold software in China in the leading position. Moldflow software is specialized in injection molding CAE softw
22、are and consulting for Moldflows range of products, the company issued since 1976, the worlds first set of injection molding CAE software, has been a leading injection molding CAE software market. To 2004, Moldflow Injection Molding CAE software in the global market share of over 75%. MoldFlow softw
23、are includes three parts: MoldFlow Plastics Advisers (product optimization consultant, MPA), MoldFlow Plastics Insisht (injection molding simulation analysis, MPI), and MoldFlow Plastics Xpert (injection molding process control specialists, MPX). Under normal circumstances, the most commonly used MP
24、I, is mainly used for injection molding process simulation to get the best number and location of the gate, reasonable flow channel system and cooling system, and cavity size, gate size, runner size and cooling systems to optimize the size and the injection molding process parameters may also be opt
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