可控注塑成型的发展趋势.pdf

1 Copyright 1999 by ASME Proceedings of Materials Processing Symposium 1999 ASME International Mechanical Engineering Congress hence the Prandtl number is about 106 and Peclet number Pe Re Pr is 103 Using these assumptions the mass momentum and energy equations reduce to the following forms in the Cartesian coordinate system 0 w z v xt 1 x P z v z 2 2 2 2 v is the velocity component P is the pressure is the shear viscosity Cp and k are the thermal properties 2 Use of simulation and controlled experiments to investigate theoretical feasibility and establish performance goals and 3 Incorporation of modern design methodologies to provide robust manufacturing processes with tight constraint based management Such manufacturing process design can provide breakthroughs for competitive advantage Recent research in manufacturing and design has overly focused on robustness and consistency As industry continues to lower its research priorities it is academe s responsibility and opportunity to take greater risks and deliver fundamentally new process technologies ACKNOWLEDGMENTS This work was funded through the period of 1992 to 2002 through sequentially General Electric Plastics Dynisco Instruments Stanford University Integrated Manufacturing Association Kona Corporation U S Department of Energy Innovative Process Program National Science Foundation Division of Design Manufacture and Industrial Innovation Hewlett Packard Corporation and the U S Office of Naval Research REFERENCES 1 C Y W Ma A Design Approach to a Computer Controlled Injection Molding Machine Polymer Engineering and Science vol 11 pp 768 772 1974 2 H S Lee Thin Cavity Filling Analysis Using the Finite Element Method with Control Volume Technique in Mechanical Engineering Troy NY Rensselaer Polytechnic Institute 1989 3 Hwai Hai Chiang Simulation and Verification of Filling and Post Filling Stages of the Injection Molding Process in Mechanical Engineering Ithaca NY Cornell University 1989 4 P D Coates and R G Speight Towards intelligent process control of injection moulding of polymers Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture vol 209 pp 357 367 1995 5 R Dubay A C Bell and Y P Gupta Control of plastic melt temperature A multiple input multiple output model predictive approach Polymer Engineering and Science vol 37 pp 1550 1563 1997 6 U Langkamp Pressure and temperature sensors Kunststoffe Plast Europe vol 86 pp 1804 1812 German 1996 7 J W Mann Process Parameter Control the Key to Optimization Plastics Engineering vol 30 pp 25 27 1974 8 M R Kamal W I Patterson N Conley D Abu Fara and G Lohfink Dynamics and Control of Pressure in the Injection Molding of Thermoplastics Polymer Engineering and Science vol 27 pp 1403 1410 1987 9 K Srinivasan and T Brinivasan Learning control of melt pressure in injection molding processes presented at American Society of Mechanical Engineers Dynamic Systems and Control Division Publication DSC Atlanta GA USA 1991 10 F Gao I A N Patterson and M R Kamal Self tuning cavity pressure control of injection molding filling Advances in Polymer Technology vol 13 pp 111 120 1994 11 C P Chiu M C Shih and J H Wei Dynamic Modeling of the Mold Filling Process in an Injection Molding Machine Polymer Engineering and Science vol 31 pp 1417 1424 1991 12 R E Nunn and C P Grolman Closed Loop Cavity Pressure Control in Injection Molding J Reinforced Plastics and Composites vol 9 pp 2121 1991 13 J T Luftig and V S Jordan Design of experiments in quality engineering New York McGraw Hill 1998 14 N P Suh D R Wilson A C Bell F V Dyck and W W Tice Manufacturing Axioms and their corollaries presented at The SME Seventh North American Metalworking Research Conference 1979 15 D O Kazmer and P Barkan Multi Cavity Pressure Control in the Filling and Packing Stages of the Injection Molding Process Polymer Engineering and Science vol 37 pp 1865 1879 1997 16 W C Bushko and V K Stokes Solidification of thermoviscoelastic melts Part I Formulation of model problem Polymer Engineering and Science vol 35 pp 351 364 1995 17 S J Liu Modeling and simulation of thermally induced stress and warpage in injection molded thermoplastics Polymer Engineering and Science vol 36 pp 807 818 1996 18 Y Ulcer and M Cakmak Overview of structure property relationships in injection molded poly ethylene 2 6 naphthalene dicarboxylate parts presented at Polymer P reprints Division of Polymer Chemistry American Chemical Society New Orleans La Usa 1996 8 Copyright 1999 by ASME 19 B Xie and D I Bigio Case studies of morphology development for iPP during the injection molding cooling process presented at Annual Technical Conference ANTEC Conference Proceedings Indianapolis In Usa 1996 20 S Cha and F S Lai Analytical study of thin wall injection molding Filling and cooling analysis presented at Annual Technical Conference ANTEC Conference Proceedings Indianapolis In Usa 1996 21 P Tantakom and N R Schott Processing strategies for thin wall injection molding presented at Annual Technical Conference ANTEC Conference Proceedings Atlanta Ga Usa 1998 22 Y Lu D Li and J Xiao Simulation of cooling process of injection molding Progress in Natural Science vol 6 pp 227 1996 23 G Y Lai and J X Rietveld Role of polymer transparency and temperature gradients in the quantitative measurement of process stream temperatures during injection molding via IR pyrometry Polymer Engineering and Science vol 36 pp 1755 1768 1996 24 H Wang M Prystay J F Hetu B Cao and C K Jen Gap between mold and part and its effect on cooling of injection molded plastics presented at Annual Technical Conference ANTEC Conference Proceedings Indianapolis In Usa 1996 25 R Rossbach Laying out heating cooling channels in injection moulds Kunststoffe Plast Europe vol 84 1994 26 S J Park and T H Kwon Thermal and design sensitivity analyses for cooling system of injection mold Part 1 thermal analysis Journal of Manufacturing Science and Engineering Transactions of the ASME vol 120 pp 287 295 1998 27 D J Seres Precise mold temperature control Industrial Heating vol 62 pp 31 1995 28 K C Apacki Copper alloy molds provide thermal advantages and shorter cycle time for injection molding presented at Annual Technical Conference ANTEC Conference Proceedings Boston Ma Usa 1995 29 Anon Basics of achieving accurate mould temperature British Plastics and Rubber pp 20 21 1996 30 S C Chen and Y C Chung Simulations of cyclic transient mold cavity surface temperatures in injection mold cooling process International Communications in Heat and Mass Transfer vol 19 pp 559 568 1992 31 Y Kurosaki I Satoh and H Kim Effects of thermal molding conditions on the residual stress and residual birefringence in an injection molded polymer strip Nippon Kikai Gakkai Ronbunshu B Hen Transactions of the Japan Society of Mechanical Engineers Part B vol 59 pp 3236 3242 1993 32 R Wimberger Friedl Molecular orientation induced by cooling stresses Birefringence in polycarbonate III Constrained quench and injection molding Journal of Polymer Science Part B Polymer Physics vol 32 pp 595 605 1994 33 G R Smoluk Electronic communication key goal in chillers mold temperature controllers Modern Plastics vol 67 pp 52 54 1990 34 M Nikitovic Optimal regulation of