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Casting mold shell boxing and roasting technology

A roasting process and shell packing technology, which is applied to manufacturing tools, casting molding equipment, casting molds, etc., can solve problems such as the impact of casting quality, and achieve the effects of improving molding quality, excellent tear resistance, and good wear resistance.

Inactive Publication Date: 2020-01-10
GUIZHOU ANJI AVIATION PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of filling refractory sand, if there is a sprue cup on the casting mold shell, the refractory sand can easily enter the casting mold shell from the sprue cup, which will affect the quality of the final molded casting

Method used

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  • Casting mold shell boxing and roasting technology
  • Casting mold shell boxing and roasting technology

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Embodiment Construction

[0019] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.

[0020] Such as figure 1 , figure 2 As shown, the present invention provides a kind of casting mold case packing roasting process, comprises the following steps:

[0021] Provide a casting formwork 1, a sand box 2 and a protective cover 3 with an opening at one end. A sprue cup is arranged on the casting formwork 1. Cover the protective cover 3 at the mouth of the sprue cup, and then place the casting formwork 1 In the sand box 2, fill the refractory sand 4 into the space inside the sand box 2, then take out the casting mold shell 1, remove the protective cover 3, use refractory material to cover the mouth of the sprue cup, and cast the mold shell 1 The shell is obtained after high-temperature calcination. Preferably, the mouth edge of the protective cover 3 is also provided with a curling edge 31 turned towards its outer periph...

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Abstract

The invention provides a casting mold shell boxing and roasting technology. The casting mold shell boxing and roasting technology comprises the following steps that a casting mold shell, a sand box and a protective cover with an opening in one end are provided, wherein a sprue cup is arranged above the casting mold shell, the protective cover covers the sprue cup mouth position, then the casting mold shell is placed in the sand box, and a gap in the sand box is filled with fire sand; and the casting mold shell is taken out, the protective cover is taken down, the refractory material covers thesprue cup mouth position, the casting mold shell is subjected to high-temperature roasting, and then the shell is obtained. By adopting the technical scheme of the casting mold shell boxing and roasting technology, the protective cover made of a natural rubber material covers the sprue cup mouth position of the casting mold shell in advance before the casting mold shell is put into the sand box,so that the fire sand is effectively prevented from entering the casting mold shell from the sprue cup, the foundation is laid for improving the molding quality of a final casting, a turned edge is preferably arranged at the edge of an opening of the protective cover, and the protective effect of the protective cover is further improved, and the forming quality of the final casting is improved.

Description

technical field [0001] The invention relates to the technical field of casting technology, in particular to a boxing and roasting process for casting mold shells. Background technique [0002] Shell roasting is one of the important processes of investment casting. Its main function is to remove the moisture, residual wax, salt and organic matter in the cavity through physical and chemical reactions of the shell through high-temperature roasting. In this way, it is avoided that a large amount of gas escapes due to impurities in the cavity when the shell is poured at high temperature, causing defects such as pores and slag inclusions in the casting, and even affecting the chemical composition and mechanical properties of the casting. In addition to removing impurities in the cavity, roasting can also make the shell pour at the temperature required by the process, thereby reducing the temperature difference between the liquid metal and the shell and improving the filling capaci...

Claims

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Application Information

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IPC IPC(8): B22C9/12B22C9/04
CPCB22C9/04B22C9/12
Inventor 周源
Owner GUIZHOU ANJI AVIATION PRECISION CASTING
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