Film dry bag isostatic press

Abstract

The invention relates to a dry bag type isostatic pressing machine, in particular to a film bag type isostatic pressing machine solving the problems that keeping of certain rigidity and evenness of a dry bag of an existing dry bag type isostatic pressing machine cannot be combined with the thickness of the dry bag, and static pressure cannot be transmitted without attenuation. The film dry bag type isostatic pressing machine comprises a rack, a high-pressure oil cylinder, a high-pressure cavity and a dry bag in the high-pressure cavity. A porous ventilating rigidity profiling die is fixed in the high-pressure cavity. A work part of the dry bag is located in the profiling die, and made of a film. A pressure adjusting oil cylinder is arranged at the bottom of the high-pressure cavity. A through hole is formed in the bottom face of the high-pressure cavity. A piston rod of the pressure adjusting oil cylinder is in sealing and sliding fit with the through hole in the bottom face of the high-pressure cavity. Due to the fact that the dry bag is the elastic film, static pressure can be evenly transmitted without attenuation. Due to the fact that the ventilating profiling die made of the porous metal material is arranged outside the film dry bag, the film dry bag can be closely attached to the inner wall of a die cavity of the profiling die under the conditions of jolt ramming or tamping and negative pressure, the fixed shape of powder is kept, and therefore the problem existing in the existing dry bag type isostatic pressing machine is solved.

Description

technical field [0001] The invention relates to a dry bag type isostatic press, in particular to a film dry bag type isostatic press. Background technique [0002] The dry bag type isostatic press uses a dry bag to isolate the liquid medium from the workpiece and transmit the pressure to complete the isostatic pressing of the powder material. Isostatic pressing of powder materials must meet the following conditions: [0003] 1) The initial packing density of the powder should be as uniform as possible, usually after shaking or tamping; [0004] 2) The shape of the powder should meet the predetermined size requirements after being compacted or compacted at the beginning; [0005] 3) The static pressure transmitted through the dry bag should be uniform, and the size of the static pressure should meet the requirements of the pressing process. [0006] Satisfying the above conditions can suppress the workpiece with qualified density and shape. [0007] Conditions 1) and 2) r...

AI Technical Summary

Problems solved by technology

[0010] The invention solves the problem that the dry bag thickness of the existing dry bag isostatic press cannot take into account the problem of maintaining a certain rigidity and uniformly transmitting static pressure, and provides a film dry bag isostatic press

Images