Do you know the knowledge of glass fiber continuous winding process?

Continuous winding pipe is with pre-impregnated glass fiber yarn or tape (or spot dip), according to the design winding law winding winding law winding mold winding mold heating, curing and molding, under the promotion of steel strip on the core mold, continuous forward pushing, demolding, and then after secondary curing fixed length cutting. When changing the pipe diameter, only the core mold of the pipe making machine needs to be replaced.

Glass fiber continuous winding raw materials:
Reinforcement materials: According to the production requirements of FRP pipes and PVC/FRP composite pipes, the varieties of reinforcement materials include surface felt, chopped glass fiber felt or needle punched composite felt combined with surface felt, no twisted roving.

Resin matrix: The resin used for continuous pipe winding is mainly unsaturated polyester resin. The requirements of the continuous winding process for the resin are: appropriate viscosity, easy to soak through the fiber, long gel time, short curing time, low curing heat release, and small curing shrinkage.