Surface quality and shrinkage of the composite bus housing panel manufactured by RTM

摘要

Resin transfer molding (RTM) process has been widely use din automobile industries, because products with large area can be manufactured easily with lower manufacturing cost than that of compression molding or hand lay up method. Although composite structures manufactured by RTM have light weight, good dynamic and impact characteristics, the low surface quality of composite structures made by RTM often hinders the adoption of composite automotive panels because parts made of lass fiber mat and unsaturated polyester often have shrinkage and warpage problems.