Continuous forming device of fiber reinforced plastic square pipe

A device for continuously forming a fiber reinforced plastic square pipe using a semi-cured preimpregnated material prepared by impregnating thermosetting resin to carbon fiber or glass fiber;

• said device comprising
• a first device for sequentially laminating a number of sheets of said preimpregnated material on a surface of a square-column-shaped core covered with a release film, said core having an outer diameter that is smaller than an inner diameter of the square pipe to be formed;
• a second device for pulling and fixing said laminated sheets throughout the forming process;
• a third device for applying a release film to the outermost layer of said laminated sheets;
• a fourth device for expanding said laminated sheets covered in said release film in a radial direction so that the inner diameter of said sheets corresponds to an inner diameter of said square pipe to be formed;
• a fifth device comprising a hot press for applying heat and pressure to said sheets;
• and
• a sixth device comprising a heating furnace for additionally heating said hot-pressed sheets.