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Lost-wax method associated with piezocrystallisation and a device for carrying out said method

A technology of pressure crystallization and lost wax casting, which is applied to casting molding equipment, metal processing equipment, casting molds, etc.

Inactive Publication Date: 2009-02-11
OTKRYTOE AKTSIONERNOE OBSHCHESTVO NOVOSIBIRSKIJ ZAVOD KHIMKONTSENTRATOV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The common technical aim of the group of the present invention is to improve the quality of cast products so that high pressures can be applied to the melt in the reinforced wax-pattern mold, which is formed during crystallization by forming a wall located on its inner wall ( The melt layer on the metal shell) is obtained while reducing the adverse influence of the crystallization process of the metal crystallization shell formed in the metal container, which prevents the melt from being extruded into the wax mold

Method used

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  • Lost-wax method associated with piezocrystallisation and a device for carrying out said method

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Embodiment Construction

[0012] The apparatus for lost-wax casting under pressure crystallization comprises a column 1 with a fixed upper table 2 and a movable lower table 3 that can be driven by a fluid drive 4 . A mounting container 5 with a wax mold 6 molded with filling material is rigidly connected to the upper table 2 . Placed on the neck 7 of the receiving container 5 is a removable refractory sleeve 8 which is held fixed in a lower plane of the neck 7 by means of a closure 9 . The closure 9 is also responsible for accommodating the filling material in the container 5 and for a sprue with an opening in the wax mold 6 . On the lower worktop 3 there is a metal container 11 with a base 12 , in a groove 13 of the base 12 , with a guaranteed clearance, a removable cup 14 with an airtight inner lining 15 is arranged. The closure 9 and the inner lining 15 can consist of a mandrel compound or a water glass mixture. An opening 16 for the escape of gas is provided in the upper part of the housing of th...

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Abstract

The invention relates to a lost-wax casting method associated with piezocrystallisation, which comprises pressing a melt from a metal receiver into the cavity of a shaped investment mould at a temperature which is greater than a liquidus line and a pressure which enables a maximum splash-free liquid metal flow and which is increasable along with the melt crystallisation to a pressure sufficient for filling the mould to a quantity of a casting shrinkage volume. The inventive device for carrying out said method comprises a metal receiver embodied in the form of a removable cylinder, which is coated inside thereof and provided with an annular flange, and a container which, comprises the shaped investment mould and whose hollow throat is provided with a removable fire-resistant sleeve. The flange is mounted in such a way that the internal diameter thereof mates with the external diameter of the sleeve, wherein the internal diameter of the flange is smaller than the internal diameter of the cylinder.

Description

technical field [0001] The invention relates to a method of lost wax casting under pressure crystallization conditions and equipment for implementing the method. Background technique [0002] From patent Nr. 2015829 is known a method of casting by metal extrusion into a mold under pressure crystallization, in which the melt is poured into an extrusion cavity when the steel is 30 to 60 degrees above the liquidus curve and in It is held before extrusion until a metal crystalline shell is formed on the wall of the extrusion chamber. A disadvantage of this method is that a mixed solid-liquid phase of the melt may form while the metal remains in the extrusion chamber. Pressure is known to work best in the liquid phase. The effectiveness of the pressure decreases when the already cooled metal is poured from the extrusion cavity into the mold where further crystallization takes place. This can manifest itself as thin sections of castings that cannot be produced consistently due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02
CPCB22D18/02B22D18/04B22C9/04
Inventor V·V·穆欣A·A·博加耶夫
Owner OTKRYTOE AKTSIONERNOE OBSHCHESTVO NOVOSIBIRSKIJ ZAVOD KHIMKONTSENTRATOV
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