Ceramic central spindle moulding mould and method for moulding ceramic shaft by dry type isostatic pressing process

Abstract

The invention relates to a ceramic central spindle moulding mould, which is characterized by comprising a hydraulic device, wherein the hydraulic device is internally provided with a fixed die tube which is provided with a pressure port; a soft die is arranged in the fixed die tube; powder is fed into the soft die through a feeding device; an upper die-set is arranged above the soft die; a metal end socket and a metal core pin are arranged on the upper die set; and a driving device drives the upper die set to go up and down. The other technical scheme of the invention provides a method for moulding a ceramic shaft by a dry type isostatic pressing process, which is characterized by comprising the following steps: feeding the powder into the soft die through the feeding device; moving down the upper die set; pressing the metal core pin into the soft die; tightly closing the upper port of the soft die by the metal end socket; driving a piston to pressurize a hydraulic cylinder through a side piston; and applying pressure on the soft die through the pressure port of the fixed die tube by the hydraulic medium so as to press the powder in the soft die into a bisque and then decompressing. The invention has high production efficiency, reduces the labor force and realizes self loading.

Description

technical field [0001] The invention relates to a mold for forming a ceramic shaft core and a method for forming a ceramic shaft by a dry isostatic pressing process using the mold. Background technique [0002] The molding process of the ceramic shaft core generally adopts two methods: hot die casting molding process and wet isostatic pressing molding process. [0003] Although the hot die casting molding process has high production efficiency, the porosity of the product is relatively high and the bulk density is low, which affects the strength and pass rate of the final ceramic shaft. The main problem is that the products of the hot die casting process will emit a certain amount of smoke and dust in the subsequent wax removal process, which will pollute the environment. [0004] The products formed by the wet isostatic pressing molding process are of good quality and do not emit any pollutants during the production process, but the production efficiency is low (each machi...

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Problems solved by technology

[0003] Although the hot die-casting process has high production efficiency, the porosity of the product is relatively high and the bulk density is low, which affects the strength and pass rate of the final ceramic shaft.

The main problem is that the products of the hot die casting process will emit a certain amount of smoke and dust in the subsequent wax removal process, which will pollute the environment

[0004] The products formed by the wet isostatic pressing molding process are of good quality and do not emit any pollutants during the production process, but the production efficiency is low (each machine + 10 people / day = 4000 shaft cores), requiring a lot of manual mold loading, Demoulding, which is a labor-intensive production mode

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