STUDY ON THE PRE-HEATED TEMPERATURES AND INJECTION PRESSURES OF THE RTM PROCESS

The objective of this research was to investigate the effects of manuf acturing variables (injection pressure, pre-heated temperature and vac uum assistance) on resin transfer molding (RTM). Specimens were made o f 40 plies of TGFC-7628 cloth fiberglass mats or 12 plies of TGFW-600 woven roving fiberglass mats under different process conditions. The f iber volume contents of the specimens were 50.3 % or 45 % in the exper iments. The flexural strengths of all the finished products tested by the method of three point bending were compared to each other to under stand the influences of each process variable on the RTM products. Bot h the pre-heated temperatures and the injection pressure were found to affect the quality of the RTM product.