Title:
METHOD FOR PRODUCING PERFORATED CAST PRODUCT
Document Type and Number:
WIPO Patent Application WO/2022/024930
Kind Code:
A1
Abstract:
[Problem] To provide a method for producing a perforated cast product of a metal or a semiconductor material having one or more holes opened in the surface, said holes being formed by pulling out one or more heat-resistant wires, which had been provided within a casting mold, after supplying a molten metal or semiconductor material into the casting mold and subsequently solidifying the molten metal or semiconductor material therein, said method being capable of forming a longer and narrower pull-out hole having a large aspect ratio, or a curved pull-out hole, while being also capable of efficiently producing the perforated cast product having a plurality of pull-out holes at low cost. [Solution] Not later than a molten metal or semiconductor material is supplied, the surface of a heat-resistant wire is provided in advance with a coating layer having a multilayer structure, said coating layer comprising a first coating layer that is formed by adhering a mold release agent to the surface, said mold release agent not generating a gas even if brought into contact with the molten metal or semiconductor material, and a second coating layer that is formed by adhering a gas generation compound onto the first coating layer, said gas generation compound being decomposed by heat when brought into contact with the molten metal or semiconductor material, thereby generating a gas.
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Inventors:
NAKAJIMA HIDEO (JP)
Application Number:
PCT/JP2021/027371
Publication Date:
February 03, 2022
Filing Date:
July 21, 2021
Export Citation:
Assignee:
IWATANI CORP (JP)
NAKAJIMA HIDEO (JP)
NAKAJIMA HIDEO (JP)
International Classes:
B22D25/02; B22C3/00; B22C9/10; B22C9/24; C22C1/08
Domestic Patent References:
| WO2014050892A1 | 2014-04-03 |
Foreign References:
| JP2001232443A | 2001-08-28 | |||
| JPS5371631A | 1978-06-26 |
Attorney, Agent or Firm:
YANAGINO Yoshihide et al. (JP)
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