Title:
GREEN COMPACT MANUFACTURING METHOD AND GREEN COMPACT
Document Type and Number:
WIPO Patent Application WO/2020/129867
Kind Code:
A1
Abstract:
This green compact manufacturing method is provided with: a first step for preparing a mold provided with a die, a lower punch, a first upper punch, and a second upper punch; a second step for filling raw material powder into a hollow portion surrounded by a first inner peripheral surface, a second inner peripheral surface, and a third inner peripheral surface of the die, in a state in which an end surface of the lower punch is located within a region surrounded by the third inner peripheral surface, an end surface of the first upper punch is located in an opening of the second inner peripheral surface, and the border between an end surface and a cylindrical surface of the second upper punch is at the same position as the end surface of the first upper punch; and a third step for lowering the first upper punch and the second upper punch relative to the die, and raises the lower punch to obtain a hollow semi-spherical green compact by compressing the raw material powder from the top and the bottom.
Inventors:
SHIMAUCHI KAZUNARI (JP)
UENO TOMOYUKI (JP)
UENO TOMOYUKI (JP)
Application Number:
PCT/JP2019/049065
Publication Date:
June 25, 2020
Filing Date:
December 13, 2019
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
SUMITOMO ELECTRIC SINTERED ALLOY LTD (JP)
SUMITOMO ELECTRIC SINTERED ALLOY LTD (JP)
International Classes:
B22F5/00; B22F1/00; B22F3/00; B22F3/035; H01F41/02; C22C38/00; H01F1/057
Foreign References:
| JP2001011508A | 2001-01-16 | |||
| US3492120A | 1970-01-27 | |||
| JPS63250404A | 1988-10-18 | |||
| JPS4025042B |
Attorney, Agent or Firm:
YAMANO Hiroshi et al. (JP)
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