Description of FRP pultrusion process?

FRP pultrusion process

FRP pultrusion is to soak continuous untwisted roving, felt, tape or cloth and other reinforcing materials soaked in glue. Under the action of traction force, the untwisted fiberglass roving and other continuous reinforcing materials are impregnated and preformed with glue, and then passed through The mold is heated, formed, and solidified to continuously produce FRP profiles with smooth surfaces, stable dimensions, extremely high strength, and unlimited lengths.

There are many forms of pultrusion molding process and there are many classification methods. Such as intermittent and continuous, vertical and horizontal, wet and dry methods, crawler traction and clamping traction, in-mold curing and in-mold gel out-mold curing, heating methods include electric heating, infrared heating, high temperature Frequency heating, microwave heating or combined heating, etc.

The pultrusion process was studied as early as 1948. It was first registered and patented in the United States in 1951. It was only in the early 1970s that it truly entered the field of structural materials. After that, the pultrusion process became a widely used process technology and gradually attracted the attention of all sectors of society. With the improvement of raw materials and equipment manufacturing levels, many key technologies of the pultrusion process have made major breakthroughs and achieved rapid development.