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Sand mold casting method

A sand casting and sand mixing technology, which is applied to casting molding equipment, molds, cores, etc., can solve problems such as difficult control and affect production efficiency, and achieve the effects of easy production control, improved production efficiency, and excellent performance

Inactive Publication Date: 2019-11-29
JIANGSU ZEEN TOOLING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mixing of molding materials in the existing sand casting is always mixed as it is used, which affects production efficiency and is not easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A sand casting method is provided, comprising the steps of:

[0020] (1) Weigh each component of the binder, specifically: montmorillonite 12kg, phosphoric acid 20kg, alumina 7kg, boric acid 0.4kg, iron oxide 0.07kg, coal powder 6kg, water balance.

[0021] (2) Heat and mix phosphoric acid, alumina and water in a reaction vessel, and keep the temperature at 175 degrees Celsius, then add boric acid, continue heating and stirring, and finally add montmorillonite and iron oxide in turn, continue heating and stirring, cool, add The pulverized coal is stirred to obtain a binder;

[0022] (3) Weigh 1000kg of silica sand and 12kg of binder, first add raw sand to the batch sand mixer, then start the batch mixer, add binder, continue to mix and stir for 1 minute, and sand out to obtain the mixture. sand;

[0023] (4) Put the mixed sand obtained in step (3) into the sand shooting cylinder, and first heat the mold to 175 degrees Celsius, and inject the mixed sand into the mold t...

Embodiment 2

[0027] A sand casting method is provided, comprising the steps of:

[0028] (1) Weigh each component of the binder, specifically: montmorillonite 10kg, phosphoric acid 22kg, alumina 5kg, boric acid 0.2kg, iron oxide 0.1kg, coal powder 4kg, water balance.

[0029] (2) Heat and mix phosphoric acid, alumina and water in a reaction vessel, and keep the temperature at 160 degrees Celsius, then add boric acid, continue heating and stirring, and finally add montmorillonite and iron oxide in turn, continue heating and stirring, cool, add The pulverized coal is stirred to obtain a binder;

[0030] (3) Weigh 100kg of silica sand and 15kg of binder, first add raw sand to the batch sand mixer, then start the batch mixer, add binder, continue to mix and stir for 1 minute, and sand out to obtain the mixture. sand;

[0031] (4) Put the mixed sand obtained in step (3) into the sand shooting cylinder, and first heat the mold to 170 degrees Celsius, and inject the mixed sand into the mold thr...

Embodiment 3

[0035] A sand casting method is provided, comprising the steps of:

[0036] (1) Weigh each component of the binder, specifically: montmorillonite 15kg, phosphoric acid 17kg, alumina 9kg, boric acid 0.5kg, iron oxide 0.05kg, coal powder 8kg, water balance.

[0037] (2) Heat and mix phosphoric acid, alumina and water in a reaction vessel, and keep the temperature at 190 degrees Celsius, then add boric acid, continue heating and stirring, and finally add montmorillonite and iron oxide in turn, continue heating and stirring, cool, add The pulverized coal is stirred to obtain a binder;

[0038] (3) Weigh 1000kg of silica sand and 8kg of binder, first add raw sand to the batch sand mixer, then start the batch mixer, add binder, continue to mix and stir for 2 minutes, and sand out to obtain the mixture. sand;

[0039] (4) Put the mixed sand obtained in step (3) into the sand shooting cylinder, and first heat the mold to 180 degrees Celsius, and under the pressure of 0.8MPa, inject ...

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Abstract

The invention discloses a sand mold casting method. The sand mold casting method includes the steps that modeling materials are mixed, mixed sand is obtained, and the modeling materials include raw sand and a binding agent, wherein the binding agent comprises montmorillonite, phosphoric acid, aluminum oxide, boric acid, ferric oxide, coal dust and water; the mixed sand is injected into a mold, mold opening is conducted, and a sand core is obtained; and the sand core is subjected to subsequent steps of modeling, mold assembling, smelting casting and shakeout cleaning, and a product is obtained.By means of the above manner, the sand mold casing method can ensure the strength, air permeability, fire resistance, deformability, plasticity and reusing performance of the sand core, good performance is achieved, the moisture absorption resisting performance is high, the storage time is long, the production efficiency is improved, and production control is facilitated.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a sand casting method. Background technique [0002] Casting is a method of melting metal and pouring it into a mold cavity that has the shape of the part, and after it is cooled and solidified, a blank or a part is obtained. The material to be cast is mostly metal that was originally solid but heated to a liquid state, while the material of the casting film can be sand, metal or even ceramics. Casting is a commonly used manufacturing method with low manufacturing cost and high process flexibility. It can obtain complex shapes and large castings, and it occupies a large proportion in mechanical manufacturing. The casting process is mainly divided into sand casting and special casting. Most of the existing castings use sand casting. However, the mixing of molding materials in the existing sand casting is all mixed as it is used, which affects the production efficiency and is not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C1/18B22C5/04B22C15/24
CPCB22C1/18B22C5/0409B22C9/02B22C15/24
Inventor 许鸿旭
Owner JIANGSU ZEEN TOOLING
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