Method and system for automatic electric sintering


Application Number: 00105314
Application Date: 2000.03.31
Publication Number: 1268415
Publication Date: 2000.10.04
Priority Information: 1999/3/31 JP 93345/1999; 2000/3/9 JP 65369/2000
International: B22F3/105;B22F7/02
Applicant(s) Name: Sumitomo Coal Mining K. K.
Address:
Inventor(s) Name: Tota Masao
Patent Agency Code: 11038
Patent Agent: zheng zhongjun
Abstract The present invention is a method of automatically loading powder material into a sintering mold and subsequently effecting electrical sintering to the powder material in the sintering mold. The method includes the steps of: fitting a lower press core into a bore formed in the sintering mold; filling different powder materials, which differ from one another in at least one of properties including component(s) of powder material, percentages of components, particle size and particle shape, into the bore to form respective powder layers of the different powder materials in the bore, such that the position of a top surface of the lower press core from a top surface of the sintering mold is adjusted depending on the thickness of the respective layers of the different powder materials being filled into the bore; preliminarily pressing at a desired pressure the powder layers of the different powder materials; displacing the pressed powder layers together with the lower press core relative to the sintering mold so as to position the powder layers to a desired position in the sintering mold; fitting an upper press core into the bore of the sintering mold and onto the powder layers and pre-heating to a desired temperature the sintering mold with the powder compact formed therein and with the upper press core fitted therein; and effecting electrical sintering to the powder compact.