US Patent 7204882 Polyurethane resin coating device

A polyurethane resin coating device includes a material mixing unit for mixing materials to have them reacted to form polyurethane resin liquid mixture. Subsequently, the polyurethane resin liquid mixture flows downward to a pressuring and sending unit to be mixed and reacted again by the helical rods rotating in the pressuring and sending unit and then pressured and conveyed to a gear pump. Afterward, the polyurethane resin liquid mixture is controlled by the rotating speed of the gears in the gear pump and steadily conveyed onto a coating wheel. A gap adjustable in size is formed between the wheel surface of the coating wheel and the outlet of the gear pump, able to carry out coating steadily and evenly.