Theses and Dissertations - UTB/UTPA

Date of Award


Document Type


Degree Name

Master of Science (MS)


Manufacturing Engineering

First Advisor

Dr. Kye Hwan Lee

Second Advisor

Dr. Rajiv Nambiar

Third Advisor

Dr. Subhash C. Bose


Stereolithography (SL) molds show great promise for injection molding of limited number of parts, greatly reducing the time to product and production cost. However, they present challenges to designers because of their strength, thermal characteristics and shorter lifetimes compared to metal molds. Gas-assisted injection molding (GAIM) has been used to alleviate the problems of distortion and thermal damage. The use of GAIM makes it possible to produce a large number of parts compared to conventional injection molding in epoxy molds with higher quality. In this research solid models of the mold with different part geometry were created using CAD and copies of the mold insert were fabricated from epoxy using Stereolithography. The Stereolithography molds were injection molded by conventional and GAIM. Tool life and quality of the parts produced by these two processes were compared and tabulated. Results show that with GAIM the tool life of SL molds were extended at least by 115% with better part quality.


Copyright 2005 Dilip Bose Ramalingam Nagarajan. All Rights Reserved.

Granting Institution

University of Texas-Pan American

Included in

Manufacturing Commons