Title:
GYPSUM-BASED INVESTMENT MATERIAL COMPOSITION FOR CASTING, AND METHOD FOR MANUFACTURING GYPSUM-BASED INVESTMENT MATERIAL COMPOSITION FOR CASTING
Document Type and Number:
WIPO Patent Application WO/2019/069874
Kind Code:
A1
Abstract:
To provide a gypsum-based investment material composition for casting and a method for manufacturing the same, the investment material composition being useful as a flash-heating-type gypsum-based investment material for making it possible to provide a product in which exposure time is reduced, such reduced exposure time not having been realized in the conventional product. A gypsum-based investment material composition for casting and a method for manufacturing the same, the investment material composition being a gypsum-based powdery investment material composition for casting, for use as a flash-heating-type investment material to which a malaxation liquid is added, the mixture is cured after malaxation, and the cured product is placed in a high-temperature furnace, wherein the gypsum-based investment material composition for casting has calcined gypsum, quartz, and cristobalite as main components thereof, the gypsum-based investment material composition for casting includes a powder or a liquid moisture-retaining component having a low water content and any one co-pulverized material selected from a co-pulverized material of calcined gypsum and quartz, a co-pulverized material of calcined gypsum and cristobalite, or a co-pulverized material of calcined gypsum, quartz, and cristobalite, and the gypsum-based investment material composition for casting has an average particle diameter of 30 µm or less.
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Inventors:
HORIUCHI TATSUYA (JP)
SUGANO KENICHI (JP)
SUGANO KENICHI (JP)
Application Number:
PCT/JP2018/036757
Publication Date:
April 11, 2019
Filing Date:
October 01, 2018
Export Citation:
Assignee:
YOSHINO GYPSUM CO (JP)
International Classes:
B22C1/08; A61C13/20; B22C7/02; C04B14/06; C04B24/02; C04B28/14
Domestic Patent References:
| WO2016043131A1 | 2016-03-24 | |||
| WO2014034525A1 | 2014-03-06 |
Foreign References:
| JPH1176270A | 1999-03-23 | |||
| JPS5396027A | 1978-08-22 | |||
| JP2001353166A | 2001-12-25 | |||
| JPS50113417A | 1975-09-05 | |||
| JP2002087918A | 2002-03-27 |
Other References:
See also references of EP 3693099A4
Attorney, Agent or Firm:
KONDO Rieko et al. (JP)
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