Geometric Influence of a Molded Part on the Draw Direction Range and Parting Line Locations-Reference-Cited by-同舟云学术

Geometric Influence of a Molded Part on the Draw Direction Range and Parting Line Locations

Published:1996-03-01 Issue:1 Volume:118 Page:29-39
ISSN:1050-0472
Container-title:Journal of Mechanical Design
language:en
Short-container-title:

Author:

Weinstein M.¹,Manoochehri S.¹

Affiliation:

1. Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030

Abstract

This paper presents a methodology based on the geometry of the injection molded part to identify the draw direction range and parting line locations. These parameters are shown to be a function of the interaction of the outward normals of the surfaces that have been divided into concave and convex regions of the part. This approach can also be applied incrementally to determine these mold parameters for a part as design features are added. The designer can then select from the choices provided to find the optimum parting line location and draw direction using heuristic rules. An absence of an allowable draw direction indicates the presence of an undercut that complicates the mold by requiring a side action so that the mold cost increases. The designer can either redesign the part or accept the undercut by specifying a side core or cavity. Design examples are provided which illustrate the effectiveness of the developed approach.

Publisher

ASME International

Subject

Computer Graphics and Computer-Aided Design,Computer Science Applications,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/mechanicaldesign/article-pdf/118/1/29/5575357/29_1.pdf

Reference17 articles.

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3. Ganter, M. A., and Tuss, L. L., 1990, “Computer-Assisted Parting Line Development for Cast Pattern Production,” American Foundryman’s Society Publication, Published by American Foundryman’s Society Des Plaines, IL pp. 795–800.

4. Ganter, M. A., and Tuss, L. L., 1990, “Computer-Assisted Pattern Development,” Advances in Design Automation—1990, ASME Design Automation Conference, September 1990, New York Vol. 23, pp. 153–158.

5. Ravi B. , and SrinivasanM. N., 1990, “Decision Criteria for Computer-Aided Parting Surface Design,” Computer Aided Design, Vol. 22, No. 1, pp. 11–18, January-February.

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