There are three main types of FRP grid production processes: reciprocating fiber winding process, continuous fiber winding process, and centrifugal casting process.
Reciprocating fiber winding process (belongs to the fixed length method): In this process method, the dipping tank reciprocates with the rotating core mold, and the long fiber glass filaments are put relative to the core mold shaft at a certain oblique angle. The winding angle is controlled by the ratio of the moving speed of the dipping tank to the rotational speed of the core mold, and the translational movement of the dipping tank is controlled by a computerized machine. The number of winding layers gradually increases until the designed wall thickness is reached. After the winding is completed, the resin in the product is substantially cured. After curing, the mandrel was removed from the glass steel pipe. FRP grille
Continuous fiber winding process (belonging to continuous method): the process is that the pipe is continuously moved through a feeding station that supplies resin pre-impregnated roving, chopped fiberglass fiber and resin sand mixture in the core. Made in. FRP grille
Centrifugal casting process (belongs to a fixed length method): In this process, cut glass fiber reinforced material and sand are fed into a steel mold fixed on a bearing, and an unsaturated resin with a catalyst is injected at one end of the steel mold to make The impregnated reinforced material, under the action of centrifugal force, the resin replaces the air in the fiber and the filler, thereby producing a dense composite material without porosity. The inner wall of the pipe forms a smooth, smooth resin-rich inner surface layer due to the action of centrifugal force Cured at higher temperatures. The pipe manufactured by this method is also called fiberglass reinforced sand pipe. FRP grille
At present, there are more manufacturers in the world that use the reciprocating fiber winding process to produce pipes than the other two production processes. One of the reasons is that the glass steel pipe manufactured by the reciprocating fiber winding process has a wider range of applications and is more suitable.