Technology for molding wax mould of single cast

A molding process, a technology of integral castings, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems that castings cannot be integrally formed, the density of castings is different, and the durability of castings is affected, so as to achieve a smooth and beautiful appearance , Dimensional stability, and the effect of saving raw materials

Active Publication Date: 2012-12-26
HENAN YUXING CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the casting process has been greatly developed, it still generally adopts traditional sand casting, metal casting, or investment casting. The disadvantage of this method is that the castings cannot be integrally formed, and the density of the castings is different. Welding combination is also prone to defects such as cracks and deformations, which greatly affects the durability of the casting and will also reduce the precision of the casting; the structure and specifications of the parts of the casting processed by traditional methods are not the same, and whether the structure of the casting is reasonable , has a great impact on the quality of castings, the feasibility and simplicity of production technology, and production costs; and the central part of castings processed by this method is very difficult to repair welding and grinding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A wax mold molding process for integral castings, the process steps are as follows:

[0027] Step 1. Put the wax material into the mixer, heat it to 45°C, stir it into a paste, then inject the paste wax material into the aluminum mold at a pressure of 3.5 atmospheres, and perform waxing of the casting body wax mold and the sprue part respectively. For the pouring of the mold, cool at room temperature for 30 minutes, then remove the wax mold of the casting body and the wax mold of the sprue, put it in the pool and cool it to 22°C, and take it out for use;

[0028] Step 2. Trim the wax mold of the casting body made in step 1, and then use a hot knife at 150°C to bond the wax mold of the sprue and the wax mold of the casting body together to obtain a casting wax mold for use;

[0029] Step 3. Mix water glass and quartz powder (preferably finer quartz powder can choose 70 mesh) according to the weight ratio of 1:0.8 to obtain quartz powder slurry, and then put the casting w...

Embodiment 2

[0036] A wax mold molding process for integral castings, the process steps are as follows:

[0037] Step 1. Put the wax material into the mixer, heat it to 47°C, stir it into a paste, then inject the paste wax material into the aluminum mold at a pressure of 3.5 atmospheres, and perform waxing of the casting body wax mold and the gate part respectively. Casting of the mold, cooling at room temperature for 45 minutes, and then demolding the wax mold of the casting body and the gate part, putting it in the water pool to cool to 25°C, and taking it out for use;

[0038] Step 2. Trim the wax mold of the casting body made in step 1, and then use a hot knife at 150°C to bond the wax mold of the sprue and the wax mold of the casting body together to obtain a casting wax mold for use;

[0039] Step 3: Mix water glass and quartz powder at a weight ratio of 1:0.8 to obtain a quartz powder slurry, then put the casting wax mold into the quartz powder slurry and soak for 2 minutes, then ta...

Embodiment 3

[0046] A wax mold molding process for integral castings, the process steps are as follows:

[0047] Step 1. Put the wax material into the mixer, heat it to 48°C, stir it into a paste, then inject the paste wax material into the aluminum mold at a pressure of 3.5 atmospheres, and perform waxing of the casting body wax mold and the sprue part respectively. For the pouring of the mold, cool at room temperature for 60 minutes, then remove the wax mold of the casting body and the gate part, put it in the pool and cool it to 27°C, and take it out for use;

[0048] Step 2. Trim the wax mold of the casting body made in step 1, and then use a hot knife at 150°C to bond the wax mold of the sprue and the wax mold of the casting body together to obtain a casting wax mold for use;

[0049] Step 3: Mix water glass and quartz powder at a weight ratio of 1:0.8 to obtain a quartz powder slurry, then put the casting wax mold into the quartz powder slurry and soak for 3 minutes, then take it out...

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PUM

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Abstract

The invention relates to a technology for molding a wax mould of a single cast. The technology comprises the following steps: putting a wax material in a mixer, and heating and stirring to a pasty state; respectively casting the wax mould of a cast body and the wax mould of a gated cast; obtaining a casted wax mould through bonding the wax mould of the gated cast with the wax mould of the cast body; obtaining an aloxite mould through carrying out a first sand sticking process and a second sand sticking process on the casted wax mould, and carrying out dewaxing processing; obtaining a blank cast through calcinating the aloxite mould and carrying out a molten steel casting process; and obtaining the single cast through finishing and annealing the blank cast. The technology of the invention which has the advantages of simple operation, cast molded in one and high yield allows the integrated intensity of the cast to be improved, materials for mould casting to be recycled, raw materials to be saved and the cost to be reduced.

Description

technical field [0001] The invention relates to a casting process, in particular to a wax mold forming process for an integral casting, especially for casting a knife-type valve body. technical background [0002] In the current production of products, molds have been widely used because of their high processing efficiency, good interchangeability and saving raw materials. Therefore, in order to promote the development and development of mold technology, advanced technology and equipment are actively adopted to improve mold level of manufacturing. Although the casting process has been greatly developed, it still generally adopts traditional sand casting, metal casting, or investment casting. The disadvantage of this method is that the castings cannot be integrally formed, and the density of the castings is different. Welding combination is also prone to defects such as cracks and deformations, which greatly affects the durability of the casting and will also reduce the prec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04B22C7/02
Inventor 范建超范红斌
Owner HENAN YUXING CASTING
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