A kind of technology method of water-free glass sand molding of anti-gravity pouring investment casting

A technology of anti-gravity pouring and process method, which is applied in the field of water-free glass sand molding of anti-gravity pouring investment castings, can solve the problems of casting scrap, huge pressure difference, equipment damage, etc., to ensure integrity, reduce heat loss, improve The effect of production efficiency

Active Publication Date: 2021-06-04
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The proposal of this scheme not only reduces the production process of water glass sand molding, greatly saves human resources, but also avoids the generation of solid waste. Certain requirements have been met, once the quality of the mold shell is not up to standard, without the protection of water glass sand, there will be a risk of running out of the casting during pouring, which will not only lead to the direct scrapping of the casting, but also cause certain damage to the equipment
Secondly, the huge pressure difference of anti-gravity casting also poses new challenges to the impact resistance of the formwork

Method used

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  • A kind of technology method of water-free glass sand molding of anti-gravity pouring investment casting
  • A kind of technology method of water-free glass sand molding of anti-gravity pouring investment casting
  • A kind of technology method of water-free glass sand molding of anti-gravity pouring investment casting

Examples

Experimental program
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Effect test

Embodiment 1

[0049] by size Take the casting as an example. The material of the casting is ZL105. The casting is basin-shaped and has a huge volume. The specific implementation steps of the water-free glass sand molding process are as follows:

[0050] Step 1: Design the gating system according to the characteristics of the casting;

[0051] Step 2: Press the wax mold of the casting, complete the assembly of the casting pouring process plan, and bond the flanging sprue cup to the lower end of the runner. The schematic diagram of the flanging sprue cup is as follows figure 1 As shown, the flanging sprue cup includes: flanging 1, sharp corner removal ring 2 and annular groove 3, flanging 1 is arranged on the outside of cylindrical runner 4, and formed between flanging 1 and cylindrical runner 4 The annular groove 3 is provided with a sharp corner removal ring 2 on the upper part of the flange 1 . The height of the flanging 1 is 10mm.

[0052] Step 3: According to the structural character...

Embodiment 2

[0064] Taking a casting with a size of 295mm×180mm×240mm as an example, the material is ZL114A, the casting is closed in a hemispherical shape, the wall thickness of the whole body is 4mm, and it is hollow. The specific steps of the water-free glass sand molding process are as follows:

[0065] Step 1: Design the gating system according to the characteristics of the casting;

[0066] Step 2: Press the wax mold of the casting, complete the assembly of the casting pouring process plan, and bond the flanging sprue cup to the lower end of the runner. The schematic diagram of the flanging sprue cup is as follows figure 1 As shown, the flanging sprue cup includes: flanging 1, sharp corner removal ring 2 and annular groove 3, flanging 1 is arranged on the outside of cylindrical runner 4, and formed between flanging 1 and cylindrical runner 4 The annular groove 3 is provided with a sharp corner removal ring 2 on the upper part of the flange 1 . The height of the flanging 1 is 10mm. ...

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Abstract

A process method for anti-gravity pouring investment casting free of water glass sand molding. Firstly, the pouring system is designed according to the characteristics of the casting; then the casting wax mold is pressed and assembled, and the flanging sprue cup is used; and the mold shell of the casting is prepared ; Finally, pour the casting mold shell against gravity. Starting from the actual conditions of casting wax mold, shell making and pouring production process, the present invention improves the flanging sprue cup; in order to ensure the consistency with the original pouring process scheme, heat-insulating ceramics and molding plates are designed to cooperate with the pouring process. Systematically improve the modeling-free process method from multiple angles. The invention solves the problem of water-free glass sand molding in the anti-gravity pouring+investment casting method, and allows the anti-gravity pouring to be better applied to investment casting.

Description

technical field [0001] The invention relates to a process method for water-free glass sand molding of anti-gravity pouring investment castings, which is suitable for the production method of anti-gravity pouring investment castings. Background technique [0002] At this stage, the anti-gravity casting process has tended to be mature. Under the action of gas pressure, the molten metal is filled from the bottom to the opposite direction of gravity, and the rising speed of the molten metal through the riser and the filling of the cavity are completed. The molding speed is determined by the pressurization speed of the gas, the faster the pressurization speed, the faster the filling speed. Therefore, anti-gravity casting has the characteristics of stable mold filling, controllable mold filling rate, reasonable temperature field distribution, and solidification under pressure is conducive to casting solidification and feeding. The produced castings have excellent mechanical proper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/04
CPCB22D18/04
Inventor 周中波何益可黄旗林琳薛祥义
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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