Title:
PRECISION NOZZLE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/089916
Kind Code:
A1
Abstract:
[Problem] To efficiently manufacture a precision nozzle using cemented carbide. This precision nozzle is manufactured through a powder compaction molding step for compression molding a raw material powder by using a transfer mold for forming a through hole to obtain a molded body having an opening corresponding to an injection port and a non-penetrating hole, a sintering step for sintering the molded body to obtain a sintered body having an opening corresponding to an injection port and a non-penetrating hole, a discharge machining step for discharge-machining the hole of the sintered body by using an electrode, and a grinding step for grinding the discharge-machined sintered body from the opposite side of the opening that will become the injection port and opening a discharge port. The obtained precision nozzle 1 is made of cemented carbide and has a through hole 3 penetrating from an injection port 2 to a discharge port 4, the through hole 3 including at least a tapered hole portion 3b extending in a direction in which the inner diameter increases toward the injection port 2 starting from the discharge port 4.
Inventors:
IKEDA SHINYA (JP)
FUKUICHI YASUHARU (JP)
FUKUICHI YASUHARU (JP)
Application Number:
PCT/JP2023/016411
Publication Date:
May 02, 2024
Filing Date:
April 26, 2023
Export Citation:
Assignee:
KYORITSU GOKIN CO LTD (JP)
International Classes:
C22C1/051; B05B1/06; B05B1/10; B22F5/10; B23P15/16; C22C29/08
Attorney, Agent or Firm:
SAKANAKA Hiroshi et al. (JP)
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