Molding is a manufacturing process for producing fiberglass section products with cross-sections of equal shape and size. The process is as follows: after being saturated in matrix materials (such as unsaturated polyester resin), reinforced materials (such as fiberglass untwisting roving and fiberglass continuous mat) are pulled by the molding equipment through the molding system, in which they solidify continuously under high temperature and pressure so that fiberglass section products are obtained with smooth surface, stable size and very high intensity.