Title:
METHOD FOR PRODUCING HIGH-POROSITY VITRIFIED GRINDING STONE
Document Type and Number:
WIPO Patent Application WO/2021/199509
Kind Code:
A1
Abstract:
[Problem] To provide a method for producing a vitrified grinding stone, whereby it is possible to stably produce a vitrified grinding stone that has a high porosity due to the presence of pores communicating with each other. [Solution] By performing a freeze vacuum drying step P3, a molded article 28 in which a plurality of frozen grains 30 are generated is placed under a vacuum condition to sublimate the frozen grains 30 in the molded article 28 to dryness. In this manner, communicating pores 32 are formed after the sublimation of the frozen grains 30. The pores 32 thus formed cannot be lost during the production process and, as a result, the shrinkage of the molded article 28 can be prevented. Therefore, a high-porosity vitrified grinding stone 10 which has a high porosity due to the presence of the communicating pores 32 can be produced stably.
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Inventors:
YOSHIMURA KOUICHI (JP)
KIMURA TOMOKI (JP)
KIMURA TOMOKI (JP)
Application Number:
PCT/JP2020/046424
Publication Date:
October 07, 2021
Filing Date:
December 11, 2020
Export Citation:
Assignee:
NORITAKE CO LTD (JP)
International Classes:
B24D3/00; B24D3/18
Domestic Patent References:
| WO2004106001A1 | 2004-12-09 |
Foreign References:
| JP2016163912A | 2016-09-08 | |||
| JP2007290101A | 2007-11-08 | |||
| CN104802104A | 2015-07-29 | |||
| JPH06503062A | 1994-04-07 | |||
| CN108314463A | 2018-07-24 |
Attorney, Agent or Firm:
IKEDA Haruyuki et al. (JP)
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