| 摘要 |
PURPOSE:To elute and remove a water-soluble thermoplastic polymer at a high speed in a short time without deforming the molding body by bringing the powder molding body contg. an org. binder consisting of water-soluble and water-insoluble thermoplastic polymers into contact with fluidized water. CONSTITUTION:A powder compact consisting of powder (metal, etc.,) and an org. binder consisting of a water-soluble thermoplastic polymer (polyethylene oxide, etc.,) and a water-insoluble thermoplastic polymer (polystyrene, etc.,) is degreased, and sintered to produce a sintered body. At this time, plural molding bodies are dipped in the water 3 in an elution tank 2, and placed on a holder 4. The water 3 is fluidized by an agitator 5 to rapidly elute the water-soluble polymer from the compact 1. The body is heated in a heating furnace to remove the residual org. binder, and sintered. By this method, the water-soluble polymer is eluted at a high speed, and a high elution rate is obtained even in a large-sized molding body. |
