Ceramic isostatic pressing mold

Abstract

The invention belongs to the technical field of ceramic production and machining, and particularly relates to a ceramic isostatic pressing forming mold. The ceramic isostatic pressing forming mold comprises an annular mold sleeve made of an elastic material, a top plate and a bottom plate, wherein the top plate and the bottom plate are positioned at the upper end and the lower end of the annular mold sleeve respectively; the annular mold sleeve, the top plate and the bottom plate together to form a cavity for containing the ceramic powder and the green body; the annular mold sleeve is providedwith a waist-controlled-shaped structure, the annular surface of the mold sleeve corresponding to the waist-controlled-shaped structure is equally divided into at least two independent arc surfaces along the circumferential direction, the adjacent arc surfaces are connected into a whole through rib plates, the rib plates are of a hinge-shaped structure, the two pages of the rib plate are connected with the adjacent edges of the two adjacent arc surfaces into a whole respectively, and the hinges protrude out of the outer ring surface of the annular mold sleeve. According to the invention, theintegrated mold is adopted to perform isostatic pressing on the waist-controlled-shaped ceramic green body, so that the demolding process is simplified, the production efficiency is improved, the overall forming quality of the green body is improved, and subsequent machining is facilitated.

Description

technical field [0001] The invention belongs to the technical field of ceramic production and processing, and in particular relates to a ceramic isostatic pressing mold. Background technique [0002] Isostatic pressing is to place the object to be processed in a closed container filled with liquid, and gradually pressurize through the pressurization system to apply equal pressure to each surface of the object, so that the molecules can be reduced without changing the appearance shape. The distance between them increases the density and improves the physical properties of the substance. Nowadays, isostatic pressing technology has been widely used in the field of ceramic processing. Different from traditional ceramic processing technology, isostatic pressing ceramic processing technology usually uses dry powder as the raw material for processing. Ceramic dry powder is processed by ball milling and granulation in the early stage. After being extruded, it can be well bonded as ...

AI Technical Summary

Problems solved by technology

In the isostatic pressing process, the quality of the mold directly affects the quality of the molded workpiece. However, for some objects with special structures, there are still many defects in the mold design in the prior art, for example, for figure 1 When the object with obvious waist-like structure shown in the figure is isostatically pressed, in order to facilitate demoulding, the mold is generally set symmetrically in two halves, and the mold with two halves has a relatively fast mold closing and mold opening process. It is cumbersome. On the other hand, it will leave obvious lines on the surface of the object, which will affect the appearance quality. In addition, isostatic pressing molds are generally made of elastic materials. Two-half molds are not conducive to shape retention when filling.

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