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Class-A Structural RIM: Report on a Program to Develop SRIM for Exterior Automotive Body Panels
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Abstract
SRIM (structural reaction injection molding) has been restricted to non-appearance parts because of problems with glass “read-out” and surface porosity. Development work undertaken by Miles Inc. has focused on improving SRIM surface quality by means of tooling, reinforcement, and processing. An SMC (sheet-molding compound) Fiero hood outer tool has been modified for use with our SRIM center-gated injection process. The surface quality of SRIM Fiero hoods painted with a glossy black polyurethane coating has been characterized in terms of distinctness of image (DOI), long-term distortion, and short-term waviness. In addition to achieving high surface quality, we have been able to produce lightweight, cost- and performance-competitive Class-A SRIM parts.
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Citation
Parks, K. and Rains, R., "Class-A Structural RIM: Report on a Program to Develop SRIM for Exterior Automotive Body Panels," SAE Technical Paper 920371, 1992, https://doi.org/10.4271/920371.Also In
References
- U.S. Patent
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- Grove, M.A. “LORIA Surface Analyzer - A Useful SMC Development Tool,” 45th Annual Conference, Composites Institute, The Society of the Plastics Industry, Inc. February 1990
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- Best, James R. Automotive Plastics Report 90 Market Search Inc. Toledo, Ohio 1990