Geometric influence of a molded part on the draw direction ranges and parting line locations

Marc Weinstein, Souran Manoochehri

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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 which 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 which 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.

Original languageEnglish
Title of host publication20th Design Automation Conference
Subtitle of host publicationVolume 1 - Dynamic Mechanical Systems; Geometric Modeling and Features; Concurrent Engineering
Pages585-592
Number of pages8
ISBN (Electronic)9780791897676
DOIs
StatePublished - 1994
EventASME 1994 Design Technical Conferences, DETC 1994, collocated with the ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium - Minneapolis, United States
Duration: 11 Sep 199414 Sep 1994

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
VolumePart F167892-6

Conference

ConferenceASME 1994 Design Technical Conferences, DETC 1994, collocated with the ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium
Country/TerritoryUnited States
CityMinneapolis
Period11/09/9414/09/94

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