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High-fluidity phosphate inorganic binder sand and preparation method thereof

An inorganic binder, high fluidity technology, applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of low casting efficiency, poor fluidity, poor casting quality, etc., to improve fluidity and collapse Good, high-intensity effect

Active Publication Date: 2016-09-28
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, in the foundry production of phosphate inorganic binder, because boric acid is added to the phosphate inorganic binder as a modifier, the viscosity of the binder increases, resulting in poor fluidity of the original phosphate inorganic binder sand. , so that the compactness of the phosphate inorganic binder sand is not enough during the molding process, resulting in low efficiency and poor casting quality in the production of castings, and it is difficult to adapt to the high-volume and high-efficiency manufacturing of precision casting molds and sand cores in modern foundry production. need

Method used

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  • High-fluidity phosphate inorganic binder sand and preparation method thereof
  • High-fluidity phosphate inorganic binder sand and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] First add 14 parts of aluminum hydroxide and 26 parts of water into the container, start the electromagnetic stirrer, adjust the temperature of the heating equipment to 120°C to heat the container, and when the liquid temperature is 98°C to 100°C, then add 100°C to the container Parts of phosphoric acid with a concentration of 70%, continue to heat until the solution is clear, at this time the solution temperature is 106°C to 108°C, keep the temperature, then slowly add 8 parts of boric acid, react until the solution becomes transparent, then add 5 parts of citric acid, the solution is clarified again Afterwards, the heating can be stopped, the agitator is closed, and the phosphate inorganic binder is obtained when the solution is naturally cooled to room temperature. In the prepared phosphate inorganic binder, the weight percentages of each component are aluminum hydroxide 11%, 70% phosphoric acid 49%, boric acid 4%, citric acid 3%, water 33%;

[0032] Take 1 part of 1...

Embodiment 2

[0035] Under the condition that the experimental method remains unchanged, change the data of some experimental materials, that is, only change the composition ratio of the additive. When making the additive, take 1 part of l-61 and mix it with water in a certain proportion, and then add 3 parts with a particle size of 600 The purpose silica is made into an additive;

[0036] The fluidity of the phosphate inorganic binder sand was tested by the hammering method, and the fluidity of the sample reached 5.96g; a number of "8" standard block samples were made on the SAC hammering type sample making machine, and then the temperature was 155 ° C. After being baked in a heating furnace for 23 minutes, the resulting tensile strength at room temperature was 1.92 MPa.

Embodiment 3

[0038] Under the condition that the experimental method remains unchanged, change the data of some experimental materials, that is, only change the composition ratio of the additive. When making the additive, take 1 part of l-61 and mix it with water in a certain proportion, and then add 5 parts of it with a particle size of 600 The purpose silica is made into an additive;

[0039] The fluidity of the phosphate inorganic binder sand was tested by the hammering method, and the fluidity of the sample reached 6.05g; a number of "8" standard block samples were made on the SAC hammering type sample making machine, and then the temperature was 155 ° C. After being baked in a heating furnace for 23 minutes, the resulting tensile strength at room temperature was 1.81 MPa.

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Abstract

The invention belongs to the field of casting and particularly relates to high-fluidity phosphate inorganic binder sand and a preparation method thereof. The high-fluidity phosphate inorganic binder sand comprises, by mass, 2500 parts of burnt sand, 100 parts of a phosphate inorganic binder, 8 parts of a metallic oxide curing agent and 5 parts of an addition agent. The addition agent comprises a solution prepared by one or more nonionic surface active agents such as alkyl glycoside, 1-61, 1-62, S-80 and MOA-9P, and silicon dioxide with the granularity at 400-1200 meshes and mixed with the solution; and the weight ratio of the nonionic surface active agents to the silicon dioxide is 1:5-1:3. According to the high-fluidity phosphate inorganic binder sand and the preparation method thereof, while the inherent advantages of cleanliness and environment protection, good collapsibility, high strength and the like of the phosphate binder sand are maintained, the fluidity of the phosphate binder sand is greatly improved, and requirements for novel green casting materials and a casting method in modern casting production are met.

Description

technical field [0001] The invention belongs to the field of casting, and in particular relates to a phosphate inorganic binder sand with high fluidity and a preparation method thereof. Background technique [0002] Casting is one of the basic processes of modern machinery manufacturing industry. As an important part of China's manufacturing industry, my country's foundry industry is also developing rapidly. However, in this industry, environmental pollution problems have always existed in large numbers. With everyone With the gradual improvement of environmental awareness, the development of green casting methods and materials is the key to the realization of green casting. However, at present, organic resin binders are still used in large quantities in the casting production process. Such binders generally contain toxic substances such as furan, benzene, and phenol, which are used in various production processes such as molding, core making, pouring, and old sand treatment....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18
CPCB22C1/185
Inventor 梁含雪肖冬梅甘曼莹
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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