| 摘要 |
PURPOSE:To prevent the bulging of a molded form around a blow hole, a pin hole due to blow hole, etc., by including volatile reaction promotor catalyst in loading gas to promote the curing of the wall face in the blow hole of molding resin. CONSTITUTION:When an urethane bumper is, for example, molded, polyol stock solution and isocyanate stock solution are filled in tanks or the like, and glass filler is mixed as the reinforcing material of a resin molded form in the polyol solution. A gas loading method is executed to enhance the dispersibility of the glass filler in the polyol solution having high viscosity and to suppress its increase in the viscosity. Further, volatile reaction promotor catalyst such as dimethylethanolamine, etc., is added to the loading gas. When a blow hole wound part 11 is formed in a molded form 10, the catalyst is moved to the inner wall face 11a, its reaction is accelerated, and the curing reaction of the wall face 11 is finished simultaneously upon ending of the molding to prevent bulging, pin hole, etc., due to heat in its post-heat treating, coating steps. |
