A Reverse Glue Approach to Automated Construction of Multi-Piece Molds
Author:
Chen Yong1, Rosen David W.2
Affiliation:
1. 3D Systems, Inc., Valencia, CA 2. School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
Abstract
Mold design can be a difficult, time-consuming process. Determining how to split a mold cavity into multiple mold pieces (e.g., core, cavity) manually can be a tedious process. This paper focuses on the mold construction step of the automated mold design process. By investigating glue operations and its relations with parting faces, an approach based on a new reverse glue operation is presented. The key to the reverse glue operation is to generate parting faces. A problem definition of parting face generation for a region is provided. Correspondingly, three face generating criteria are identified. Based on the parting lines of a region, our algorithms to generate the parting faces are presented. Our mold construction algorithms for two-piece molds and multi-piece molds are also presented with brief discussions. Some industrial examples are provided which illustrate the efficiency and effectiveness of our approach. We tested our mold designs by fabricating stereolithography mold inserts (a rapid tooling method) and molding parts.
Publisher
ASME International
Subject
Industrial and Manufacturing Engineering,Computer Graphics and Computer-Aided Design,Computer Science Applications,Software
Reference26 articles.
1. Jacobs, P., 1996, Stereolithography and Other RP&M Technologies: From Rapid Prototyping to Rapid Tooling, Society of Manufacturing Engineers, Dearborn, MI, Chap. 10. 2. Chen, Y., and Rosen, D. W., 2002, “A Region Based Method to Automated Design of Multi-Piece Molds With Application to Rapid Tooling,” ASME J. Comput. Info. Sci. Eng. 2(2), pp. 86–97. 3. Huang, J., Gupta, S. K., and Stoppel, K., 2003, “Generating Sacrificial Multi-Piece Molds Using Accessibility Driven Spatial Partitioning,” accepted in Computer Aided Design. 4. Majhi, J., Gupta, P., and Janardan, R., 1999, “Computing a Flattest, Undercut-Free Parting Line for a Convex Polyhedron, With Application to Mold Design,” Computational Geometry, 13(4), pp. 229–252. 5. Tan, S. T., Yuen, M. F., Sze, W. S., and Kwong, K. W., 1990, “Parting Lines and Parting Surfaces of Injection Moulded Parts,” IMechE Part B: J. of Engineering Manufacture, 204, pp. 211–221.
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