POWDER MOLDING DEVICE, AND POWDER MOLDING METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a powder molding device and a powder molding method where powder molding for a component having helical grooves with inside diameter steps having a first inner helical gear at the inside face of a cylindrical part provided with an inner collar on one end side, and whose outer circumference has ruggedness or the like and is deformed is made possible, the component can be sintered, so as to be produced, and the improvement of the mass-producibility in the component and the reduction of cost are attained.;SOLUTION: A lower punch for molding the lower side of a cylindrical part in a powder molding is divided into the two of a lower first punch 2 and a lower second punch 3 on the coaxial cylinder, so as to freely rotatably support the lower second punch 3. The compression of powder 19 is performed under conditions where the lower first punch 2 is fixed to a fixed position, the lower second punch 3 is rotated at a fixed position in accordance with the lead of helical gear teeth for molding in a first helical groove molding part 4a, and a lower third punch 4 is lowered without rotation. Further, the pulling-out of the lower third punch 4 is performed in such a manner that the lower third punch 4 is rotatively lowered.;COPYRIGHT: (C)2007,JPO&INPIT