Method for producing casting fireproof material by negative pressure hollow type method

A technology of melting and casting refractory materials and negative pressure, applied in ceramic molding machines, manufacturing tools, etc., can solve problems such as increasing product production costs, wasting molding sand, and environmental pollution, and achieve the effects of cost reduction, product quality improvement, and environmental pollution elimination.

Active Publication Date: 2010-05-19
侯松发
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the production method of electrofusion casting refractories includes the following steps: first, sand with certain refractory properties is bonded with water glass as a binder, and then molded into a molded plate, and then the molded plate is shaped according to the product shape required by the user cavity, and then cast the melted refractory material into the cavity, heat preservation and annealing to relieve stress and then process it into finished products. This conventional production method saves a lot of molding sand and water glass, and the drying The heat energy not only causes a lot of waste of energy and labor, but also causes pollution to the environment; due to the low yield of this traditional processing method, it further increases the production cost of the product

Method used

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  • Method for producing casting fireproof material by negative pressure hollow type method
  • Method for producing casting fireproof material by negative pressure hollow type method
  • Method for producing casting fireproof material by negative pressure hollow type method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 Shown, the negative pressure air type production method of casting refractory material of the present invention, it comprises following processing steps:

[0023] 1. According to the product size, the upper and lower split metal casting molds 1 of 300mm×400mm×600mm are made;

[0024] 2. Adsorb the polyethylene film 2 on the outer surface of the mold 1 by negative pressure;

[0025] 3. Put the mold 1 with the polyethylene film 2 obtained in the second step into the split sand box 4 with a negative pressure generating device 3 (vacuum pump can be used), bury the pure silica sand and shake it with a vibrator After the vacuum pump 3 stops working, after the mold 1 is taken out from the sand box 4, an empty cavity surrounded by polyethylene film 2 is obtained in the sand box 4;

[0026] 4. Cast the molten AZS refractory solution melted in the electric furnace in a traditional way through the exhaust spout 5 on the upper top mold 1 into the empty cavity mad...

Embodiment 2

[0029] Such as figure 1 Shown, the negative pressure air type production method of casting refractory material of the present invention, it comprises following processing steps:

[0030] 1. According to the product size, make an upper and lower split hollow wooden mold 1 of 300mm×400mm×600mm;

[0031] 2. Adsorb the polyvinyl chloride film 2 on the outer surface of the mold 1 by using negative pressure;

[0032] Three, put the mold 1 with the polyvinyl chloride film 2 obtained in the second step into the sand box 4 with the negative pressure generating device 3 (can use a vacuum pump), and bury the aluminum oxide hollow balls (keep the hollow balls in the hollow balls) The particle size is less than 50 microns (no more than 10% of the total weight), shake with a vibrator to make it evenly filled, and then use the vacuum pump 3 to extract the internal air; Promptly obtain the empty cavity surrounded by polyvinyl chloride film 2 in case 4;

[0033] 4. Cast the fused alumina re...

Embodiment 3

[0036] Such as figure 2 Shown, the negative pressure air type production method of casting refractory material of the present invention, it comprises following processing steps:

[0037] The first step is to make upper and lower split hollow molds 1 with foam according to the shape of the product;

[0038] The second step is to put the hollow mold 1 into the sand box 4 with the negative pressure generating device 3 (vacuum pump), bury the casting sand, vibrate it with a vibrator to make it evenly filled, and then use the vacuum pump 3 to extract the internal air;

[0039] The third step is to directly cast the melted refractory material solution into the foam hollow mold 1 through the exhaust spout 5 on the top mold by traditional technology, start the vacuum pump 3, keep the negative pressure state, and release the negative pressure after the melt is solidified. Press, and get the finished product after cooling.

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Abstract

The invention discloses a negative pressure hollow method to produce melt casting refractory, which includes steps mentioned below. The first step is to produce a mold according to the shape of a product. The second step is to use the negative pressure to absorb a thermoplastic film to the surface of the mold. The second third step is to put the mold with the thermoplastic film in a flask, which is equipped with a negative pressure generation device. When molding sands are berried, the flask is shaken to be evenly filled. Inner air is extracted out. The mold is fetched out of the flask. And ahollow cavity is obtained in the flask. The fourth step is to cast the melted refractory solution in the hollow cavity, which is made in the third step. The negative status is maintained until the melt solution is solidified. A finished product is obtained after cooling. With the method adopted, AZS refractory, alumina refractory or magnesia-alumina refractory products can be produced. When the products are molded, no discrete stomata is produced on the surfaces. The surfaces of the obtained melt molding products are bright light yellow. The material quality is compact and no shrinkage holes and cracks are made. The product quality is improved and the production cost is lowered.

Description

technical field [0001] The invention relates to a method for producing a cast refractory material, in particular to a method for producing a cast refractory material in a negative pressure hollow mold. Background technique [0002] At present, the production method of electrofusion casting refractories includes the following steps: first, sand with certain refractory properties is bonded with water glass as a binder, and then molded into a molded plate, and then the molded plate is shaped according to the product shape required by the user cavity, and then cast the melted refractory material into the cavity, heat preservation and annealing to relieve stress and then process it into finished products. This conventional production method saves a lot of molding sand and water glass, and the drying The heat energy not only causes a lot of waste of energy and labor, but also pollutes the environment; due to the low yield of this traditional processing method, it further increases...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/54B28B7/34
Inventor 侯松发徐献忠
Owner 侯松发
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