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Preparation method of large semi-closed inner cavity shell

A semi-closed, inner cavity technology, which is applied to casting molding equipment, casting molds, cores, etc., can solve problems such as uneven wall thickness, scrapped castings, and complex inner cavity structure, so as to achieve uniform wall thickness and avoid steel breakout Effect

Active Publication Date: 2018-12-07
XIAN SPACE ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complexity of the inner cavity structure leads to the difficulty of the mold shell manufacturing in the process of shell preparation and the uniformity of slurry and sand shower
The shell of the large semi-closed inner cavity often has the problem of steel breakout caused by uneven wall thickness, which leads to the scrapping of castings

Method used

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  • Preparation method of large semi-closed inner cavity shell
  • Preparation method of large semi-closed inner cavity shell
  • Preparation method of large semi-closed inner cavity shell

Examples

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preparation example Construction

[0043] A method for preparing a shell with a large semi-closed inner cavity. The large semi-closed inner cavity shell includes n structural units, and each structural unit is approximately a structure of revolution. When the number of structural units n is greater than or equal to two When , one of them is determined as the main structural unit, and the rest of the structural units and the main structural unit are in the habitual connection relationship. The side wall of each structural unit is an approximate rotary structure with an open bottom and a closed top. The pouring system is placed on the top of the main structural unit, which is the gripping part of the robot during the shell preparation process. The steps of the method include:

[0044] (1) prepare the wax mold of mold shell;

[0045] (2) configure slurry;

[0046] (3) Place the wax pattern prepared in step (1) into the slurry prepared in step (2) for dipping. After the surface of the wax pattern is covered with...

Embodiment 1

[0074] The large semi-enclosed inner cavity housing includes a structural unit, which is a rotary structure, and the structural unit is a U-shaped structure, and the side wall of the U-shaped structure is an approximate rotary structure, with an open bottom and a closed top.

[0075] The preparation method of this type shell is:

[0076] (1) Prepare the wax model of the shell, such as figure 1 shown;

[0077] (2) configuration slurry;

[0078] (3) Place the wax pattern prepared in step (1) into the slurry prepared in step (2) for dipping, after the surface of the wax pattern is covered with slurry, take out the wax pattern, and then control the slurry;

[0079] (4) Evenly shower sand on the surface of the wax mold with the slurry adhered in step (3), then let it stand and dry at a temperature of 22±3°C and a relative humidity of 40% to 65%;

[0080] (5) Place the product obtained in step (4) into the slurry prepared in step (2) for dipping. After all the slurry is covered, ...

Embodiment 2

[0097] The large semi-closed inner cavity shell includes two structural units, both of which are a structure of revolution. The structural units are both U-shaped structures, and the two U-shaped structures are aligned at 90°, such as Figure 4 As shown, the side wall of the U-shaped structure is an approximate rotary structure with an open bottom and a closed top.

[0098] The preparation method of this type shell is:

[0099] (1) prepare the wax mold of mold shell;

[0100] (2) configuration slurry;

[0101] (3) Place the wax pattern prepared in step (1) into the slurry prepared in step (2) for dipping. After the surface of the wax pattern is covered with slurry, take out the wax pattern and then control the slurry; wax pattern control The direction and angle of slurry placement ensure uniform slurry on the surface;

[0102] (4) Evenly shower sand on the surface of the wax mold with the slurry adhered in step (3), then let it stand and dry at a temperature of 22±3°C and a...

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Abstract

The invention relates to a preparation method of a large semi-closed inner cavity shell, and belongs to the technical field of investment precision casting. According to the preparation method, a multi-angle combination mode is adopted for slurry control and sand spraying, so that the uniformity of slurry soaking and sand spraying is ensured; and slurry soaking, slurry control and sand spraying angle, time and speed are reasonably designed, so that the uniformity of the wall thickness of the shell is ensured, and the problem of steel leakage is solved.

Description

technical field [0001] The invention relates to a method for preparing a large-scale semi-closed inner shell shell, which belongs to the technical field of investment precision casting. Large-scale means that the outer diameter of the shell is not less than 400mm, and the height of the shell is not less than 300mm. Background technique [0002] At present, for large semi-closed inner cavity shells, investment casting is a reasonable process method for manufacturing such structural parts. The complexity of the inner cavity structure makes the uniformity of slurry and sand showering become difficult points in the shell manufacturing process. The shell of the large semi-closed inner cavity shell often has the problem of steel breakout caused by uneven wall thickness, which leads to the scrapping of castings. Contents of the invention [0003] The technical problem of the present invention is: to overcome the deficiencies of the prior art, and propose a preparation method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C9/24
CPCB22C9/04B22C9/24
Inventor 杨欢庆王琳高怀胜纪艳卿陈鹏荣
Owner XIAN SPACE ENGINE CO LTD
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