The tube is made in continuous movement of mandrel. It should be feed into steel mould fixed in bearing. After continuous filament winding and centrifugal casting process finishes,the number of pipe manufacturers using reciprocating fiber winding process is more than that of other two production technology. After the resin in products has been solidified, you should inject unsaturated resin with catalyst at the one side of steel mould. This process is that pipe passes through a feeding station whcih aims to supply resin presoak twistless roving. There are mainly three manufacturing techniques of glass fiber pipe. Reciprocating fiber winding technology (belonging to the fixed length method). The main material includes glass fiber reinforced materials and sand. Auxiliary angle (wingding angel) is controlled by the ratio of impregnating vessel movement speed and mandrel rotate speed. Pipe usually solidifies under high temperature. With the help of centrifugal force, its applicability is very good. Continuous filament winding process(belongs to continuous method). Impregnating vessel movement is controlled by computerization machine. With the number of the layers increases gradually, inner tube form a smooth plane due to the centrifugal force and mandrel gets out of glass?reinforced?plastics pipe. Centrifugal casting process (belonging to the fixed length method). Tube made in this way, is also known as glass fiber reinforced plastic sand pipe. Reciprocating filament winding process In this process
