Virtual plastic injection molding based on virtual reality technique

Virtual reality (VR), as a new technology, is integrated with software systems for engineering, design, and manufacturing. The integration has given a new impetus to the field of computer-aided engineering. This paper presents a research effort aimed at creating a virtual plastic injection molding (VPIM) environment, which is designed and implemented based on techniques such as VR, multidiscipline simulation, and scientific visualization. The VPIM system includes two parts: designing in VPIM and evaluation in VPIM. It is the first system to scrutinize virtual prototype mock-ups of new products, machines and production processes in interactive graphic simulation. During the evaluating phase, coupled to appropriate computer-based reasoning and decision-support tools and driven by data from the real manufacturing environment, a realistic impression of the process of plastic injection molding and manufacture can be achieved and can be changed interactively, and it is possible to thoroughly examine the planned system and eventually detect and remove any defects and inadequacies. The construction approach and key techniques (FEA, virtual assembly, stereoscopic display, a triangulated boundary-representation of an approximating polyhedron, collision detection, etc.) of the system are described in detail. The overall system is a powerful new approach for highly relevant industrial application of VPIM which focuses on the construction and assessment of alternate manufacturing sequences and mold design in an early design stage. Improvement of the design and manufacturing process will lead to better design and reduced development time and cost.

[1]  Stephen R. Ellis,et al.  What are virtual environments? , 1994, IEEE Computer Graphics and Applications.

[2]  François X. Sillion,et al.  Multi‐layered impostors for accelerated rendering , 1999, Comput. Graph. Forum.

[3]  George Drettakis,et al.  Efficient Impostor Manipulation for Real‐Time Visualization of Urban Scenery , 1997, Comput. Graph. Forum.

[4]  Huamin Zhou,et al.  A numerical filling simulation of injection molding using a 3D surface model , 2001 .

[5]  Huicheng Zhou,et al.  A Remote Injection Moulding Simulation System Based on the Internet and the Web , 2002 .

[6]  Carl Machover,et al.  Virtual reality , 1994, IEEE Computer Graphics and Applications.

[7]  William E. Lorensen,et al.  Decimation of triangle meshes , 1992, SIGGRAPH.

[8]  William Schroeder,et al.  The Visualization Toolkit: An Object-Oriented Approach to 3-D Graphics , 1997 .

[9]  Heinz Handels,et al.  Virtual planning of hip operations and individual adaption of endoprostheses in orthopaedic surgery , 2000, Int. J. Medical Informatics.

[10]  Helmut Pralle,et al.  Virtual reality movies-real-time streaming of 3D objects , 1999, Comput. Networks.

[11]  ARISTIDES A. G. REQUICHA,et al.  Representations for Rigid Solids: Theory, Methods, and Systems , 1980, CSUR.

[12]  Odd Tullberg,et al.  A framework for immersive FEM visualisation using transparent object communication in a distributed network environment , 2002 .

[13]  Kevin W. Lyons,et al.  Virtual assembly using virtual reality techniques , 1997, Comput. Aided Des..

[14]  F Lacquaniti,et al.  Virtual reality: a tutorial. , 1998, Electroencephalography and clinical neurophysiology.

[15]  Huamin Zhou,et al.  A numerical simulation of the filling stage in injection molding based on a surface model , 2001 .

[16]  Louis Thomas Manzione,et al.  Applications of Computer Aided Engineering in Injection Molding , 1988 .

[17]  William E. Lorensen,et al.  The visualization toolkit (2nd ed.): an object-oriented approach to 3D graphics , 1998 .