Quasi-temperature isostatic pressing forming method and die

Abstract

The invention discloses a quasi-temperature isostatic pressing forming method and a die. An outer die comprises a female die and male dies arranged at the two ends of the female die, the female die is of a transparent cylinder structure, exhaust holes are evenly and symmetrically formed in the wall face of the female die, and a cavity defined by the female die and the male dies is filled with an inner die; a first cavity used for containing a sample is formed in the inner die, the first cavity is in a cuboid shape, the inner die comprises a plurality of inner die blocks, the inner die blocks comprise contact inner die blocks and supporting inner die blocks, and the orthographic projection range from each face of the first cavity to the inner wall face of the outer die is provided with the contact inner die blocks used for making contact with the surface of the sample; and the sizes of the contact inner die blocks corresponding to the two opposite faces in the first cavity are the same, and the area, outside the contact inner die blocks, of an inner cavity of the outer die is filled with the supporting inner die blocks. According to the quasi-temperature isostatic pressing forming method and the die, through reasonable arrangement of the component structure, uniform and compact forming of a green body is achieved, the quasi-temperature isostatic pressing forming method and the die are suitable for the conditions with and without gas product discharging in the forming process, and the application range is wide.

Description

technical field

[0001] The invention belongs to the field of new material moulds, and in particular relates to a quasi-thermal isostatic pressing forming method and a mould. Background technique

[0002] Isostatic pressing technology is an advanced technology that uses the products in the closed high-pressure container to form under the state of uniform high-pressure pressure in all directions. Compared with one-way or two-way pressure forming, isostatic pressing has many advantages. The products formed by isostatic pressing have a high density, which is generally 5% to 15% higher than that of one-way and two-way compression molding; moreover, the density of compacts formed by isostatic pressing is uniform. Or two-way pressing, there will be uneven density distribution of the green compact.

[0003] The traditional working principle of isostatic pressure is Pascal's principle. In a sealed container, the static pressure generated by the external force acting on the static l...

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