PURPOSE: To grind adequately even with a liquid at a comparatively higher boiling point, control heat generated in a solid as an object to be ground or crushed, prevent sufficiently the object from degrading qualitatively due to qualitative alteration or odor and effective component dissipation, and allow the adequate grinding and crushing of a solid which is technically difficult to grind and crush on account of the softening, deformation and fusion of the object, thus widening the selection range of types of liquid to be used.
CONSTITUTION: A space for grinding and crushing action between a rotary blade 5 and a fixed blade 6 is decompressed using a decompression device 13 such as a vacuum pump. Further, a liquid such as water is sprayed into the space, and a pressure is applied to a solid 7 by rotation of the rotary blade 5 to grind and crush the solid. The decompression is adjusted to such a degree that the temperature is lower than a temperature at which it is impossible to grind and crush the solid due to the qualitative degradation of the solid 7 by its temperature rise or the softening, qualitative alteration and fusion of the solid 7 by its temperature increase, and the boiling point of liquid such as water lowers. The quantity of the liquid is to be determined by the total surface area of the solid 7 or a ground and crushed product to be obtained in accordance with the type of the liquid.
TEZUKA NORIO
HATTA NAOKI
HATAMURA YOTARO