Computer Aided Design of The Cooling System for Plastic Injection Molds

Yıl 2009, Cilt: 15 Sayı: 2, 263 - 268, 01.02.2009

Hakan Gürün Ahmet Özdemir Tunahan Acar

Öz

The design of plastic injection molds and their cooling systems affect both the dimension, the shape, the quality of a plastic part and the cycle time of process and the cost of mold. In this study, the solid model design of a plastic injection mold and the design of cooling sysytem were possibly carried out without the designer interaction. Developed program permited the use of three types of the cooling system and the different cavity orientations and the multible plastic part placement into the mold cores. The program which was developed by using Visual LISP language and the VBA (Visual BASIC for Application) modules, was applicated in the AutoCAD software domain. Trial studies were presented that the solid model design of plastic injection molds and the cooling systems increased the reliability, the flexibility and the speed of the design.

Anahtar Kelimeler

Computer aided design, Injection mold design, Design of cooling system.

Plastik Enjeksiyon Kalıpları İçin Bilgisayar Destekli Soğutma Sistemi Tasarımı

Öz

Plastik enjeksiyon kalıplarının ve soğutma sisteminin tasarımı, hem ürünün boyut, biçim ve kalitesini, hem de çevrim zamanını ve kalıbın maliyetini doğrudan etkilemektedir. Yapılan çalışmada, plastik enjeksiyon kalıplarının ve soğutma sisteminin katı model olarak tasarımı, mümkün olduğu kadar kullanıcı etkileşiminden uzak olarak gerçekleştirilmiştir. Hazırlanan program, kalıp çekirdeklerinin üç farklı tipte soğutma sistemine, farklı göz yerleşimlerine ve parça sayılarına bağlı olarak tasarımının yapılmasına izin vermektedir. Program akışında, AutoCAD 2007 paket programının yanında Visual LISP ve VBA (Visual BASIC for Application) dilleri de kullanılmıştır. Çalışma kapsamında yürütülen deneme uygulamaları ile plastik enjeksiyon kalıplarının tasarımında hız, esneklik ve tasarım güvenilirliğinin arttığı tespit edilmiştir.

Anahtar Kelimeler

Bilgisayar destekli tasarım, Enjeksiyon kalıbı tasarımı, Soğutma sistemi tasarımı.

Kaynakça

• Aisa, J. C., Javierre , J.A., Serna, D. 2006. An example of simulation tools use for large injection moulds design: The CONTENURTM 2400l solid waste con- tainer. Journal of Materials Processing Techno- logy. (1759, 15–19.
• Crawford, R.J. 1998. Plastics Engineering 3rd Edition 278-306 s. Pergamon Pres, Oxford.
• Fu, M.W., Fuh, J.Y.H., Nee, A.Y.C. 1999. Undercut feature recognition in an injection mould design system. Computer-Aided Design. (31), 777-790.
• Hui, K.C. 1997. Geometric aspects of the mouldability of parts. Computer-Aided Design. (29), 197-208.
• Kennedy, P. 1995. Flow Analysis of Injection Molds 1-40 s. Hanser/Gardner Publications Inc. Munich.
• Kong, L., Fuh, J.Y.H., Lee, K.S., Liu, X.L., Ling, L.S., Zhang, Y.F., Nee, A.Y.C. 2003. A Windows-native 3D plas- tic injection mold design system. Journal of Ma- terials Processing Technology. (139), 81-89.
• Li, C.L. 2001. A future-based approach to injection mold cooling system design, Computer Aided Design. (33), 1073-1090.
• Li, C.L., Li, C.G., Mok, A.C.K. 2005. “Automatic layout de- sign of plastic injection mould cooling system”. Computer-Aided Design. (37), 645-662.
• Li, D., Zhou, H. 2005. Mold cooling simulation of the pressing process in TV panel production. Simu- lation Modelling Practice and Theory. (13), 273-285.
• Lin, J.C. 2002. Optimum cooling system design of a free-form injection mold using an abductive net- work. Journal of Materials Processing Techno- logy. (120), 226–236.
• Lou, Z., Jiang, H., Ruan, X. 2004. Development of an integrated knowledge-based system for mold- base design. Journal of Materials Processing Technology. (150), 194-199.
• Nardin, B., Kuzman, K., Kampus, Z. 2002. Injection mo- ulding simulation results as an input to the injec- tion moulding process. Journal of Materials Pro- cessing Technology. 130-131, 310-314.
• Osswald, T.A. 1998. Polymer Processing Fundamentals 117-139 s. Hanser/Gardner Publications Inc. Mu- nich.
• Priyadarshi, A.K., Gupta, S.K. 2004. Geometric algo- rithms for automated design of multi-piece per- manent molds. Computer-Aided Design. (36), 241-260.
• Pye, R.G.W. 1989. Injection Mould Design 180-218 s. Longman Singapore Publishers, Singapore.
• Qiao, H. 2005. Transient mold cooling analysis using BEM with the time-dependent fundamental so- lution. International Communications in Heat and Mass Transfer. (32), 315–322.
• Qiao, H. 2006. A systematic computer-aided approach to cooling system optimal design in plastic injec- tion molding. International Journal of Mechani- cal Sciences. (48), 430-439.
• Tang, L.Q., Chassapis, C., Manoochehri, S. 1997. Opti- mal cooling system design for multicavity injec- tion molding. Finite Element in Analysis and De- sign. (26), 229-251.
• Uluer, O., Güldaş, A., Özdemir, A. 2005. Ergimiş plasti- ğin kalıp boşluğundaki gerçek akış davranışının gözlenmesi için kalıp tasarımı ve imalatı. Tekno- loji. (8), 181-189.
• Xu, X., Sachs, E., Allep, S. 2001. The Design of Confor- mal Cooling Channels in Injection Molding To- oling. Polymer Engineering and Science. 41 (7), 1265-1279.