Resin infusion molding is done at the conditions where the resin viscosity should not change appreciably during the infusion process. If it does, your temperature setting, and the amount of initiator and/or catalyst are not appropriate. If the temperature of the resin reservoir is lower than the mold temperature, then the viscosity of the resin may increase appreciably when the resin enters the mold. Again, you need to adjust the mold temperature and initiator/catalyst concentration in such a way that insufion process complete without difficulty (significant increase in the viscosity). If the amount of catalyst is too low, it would be easy to infuse but curing time required would be too lone. Thus, the condition setting is the know-how of the infusion molding.
First thing you should do is to read technical data sheet (TDS) of your resin. Anyway typical highest accepted processing temperature for epoxy resin is about 50 celsius. In case of typical epoxy is the moment you looking for. But your main document is TDS because thickness of your laminate may affect for limitations of temperature. You also should remember that epoxy is not polyester and % amount of hardner must be constant. if I misunderstood and your resin is polyester you have a bit more variables (as say Hatsuo)