There are three main types of fiberglass tube production processes: reciprocating filament winding, continuous filament winding, and centrifugal casting.
Reciprocating fiber winding process (length-fixing method): In this process, the dipping tank reciprocates with the rotating mandrel, and the long-fiber glass wire is supplemented with a certain oblique angle with respect to the mandrel axis, and the auxiliary angle (ie The winding angle is controlled by the ratio of the moving speed of the dipping tank to the speed of the core mold, and the translational movement of the dipping tank is controlled by a computerized machine. The number of winding layers is gradually increased until the wall thickness of the design is reached. After the winding is completed, the resin in the article is substantially cured. After curing, the mandrel is removed from the glass tube.
Continuous filament winding process (belonging to continuous process): This process is a feeding station in which the tube is pre-impregnated with roving, chopped fiberglass fiber and resin sand mixture during the movement, and the tube is continuously advanced in the core mold. Made in the middle.
Centrifugal casting process (length-fixing method): In this process, the cut glass fiber reinforced material and sand are fed into a steel mold fixed on the bearing, and a catalyst-added unsaturated resin is injected into one end of the steel mold. The impregnating reinforcing material, under the action of centrifugal force, the resin replaces the air in the fiber and the filler, thereby producing a non-porous dense composite material, and the inner wall of the tube forms a smooth, smooth and resin-rich inner surface layer due to the centrifugal force, the pipe material Curing at higher temperatures. The pipe manufactured by this method is also called a glass fiber reinforced plastic sand pipe.
The world's manufacturers using reciprocating filament winding technology are much more numerous than the other two production process manufacturers. One of the reasons is that the glass tube produced by the reciprocating filament winding process has wider application and better applicability.
