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The process of material entering the curing mold, solidifying and shaping it within the mold, and then being pulled out is a crucial and primary step in the production of FRP (fiberglass reinforced plastic) optical cable reinforcing cores. The quality of PRP products largely depends on the mold, as a qualified mold guarantees the production of qualified products. In designing the molding mold, in addition to considering the geometric dimensions of the product’s cross-section, the following two factors should be primarily considered:
1.The chemical and physical characteristics of the resin system’s curing reaction;
2.The frictional properties between the pultruded material and the mold wall.
In many cases, based on the resin’s reaction characteristics and related material properties, the mold is designed with three distinct heating zones: a preheating zone, a gelation zone, and a curing zone. The temperatures of these three zones are coordinated. While the temperatures of these three zones do not affect the surface quality of the product, they significantly influence its mechanical properties. Therefore, the control and distribution of the three heating zones in the mold must be strictly controlled.
