Bonding agent and preparing method thereof

A kind of binder, a certain amount of technology, applied in the preparation of binder, phosphate binder field, can solve the problem of loss of bond strength, etc., achieve fast curing speed, good moisture resistance, and reduce production costs

Inactive Publication Date: 2017-01-11
姚伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, in a high-humidity environment, the phosphate binder type (core) sand is easy to absorb hydrogen ions in water due to the large electronegative oxygen ions of the phosphate radical, which leads to the disconnection of the nodes of the network structure and the loss of bond strength.

Method used

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  • Bonding agent and preparing method thereof
  • Bonding agent and preparing method thereof

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to the following examples.

[0012] A binder, the binder is a phosphate binder, the weight percentage of each component is: the phosphate content is 60%~63%, the iron oxide powder content is 12%~15%, the polyvinyl alcohol content It is 14%~17%, and the boron content is 8.5%~9.5%. Through orthogonal test, the weight percentage of phosphate is 62.5%, the weight percentage of iron oxide powder is 12.5%, the weight percentage of polyvinyl alcohol is 15.62%, and the weight percentage of boron is 9.38%. The overall performance of the binder is the best. The relevant test data table as follows.

[0013]

[0014] Table 1 Binder stability

[0015]

[0016] Table 2 Average bond strength of different curing agents

[0017] Under the premise of ensuring the thermal curing of the phosphate binder, when the polyvinyl alcohol is selected at a concentration of...

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Abstract

The invention discloses a bonding agent. The bonding agent is a phosphate bonding agent and comprises, by weight percent, 60% to 63% of phosphate, 12% to 15% of iron oxide powder, 14% to 17% of polyvinyl alcohol and 8.5% to 9.5% of boron, wherein the comprehensive performance of the bonding agent with the weight percent of the phosphate being 62.5%, the weight percent of the iron oxide powder being 12.5%, the weight percent of the polyvinyl alcohol being 15.62%, and the weight percent of the boron being 9.38% is best. The bonding agent has the beneficial effects that compared with the prior art, the preparing technology is simple, reliability is high, on the basis of sufficiently utilizing the excellent characteristics of high strength, easy collapsibility, environment friendliness and no gas generation of the phosphate bonding agent, the moisture absorption defect of the phosphate is removed, and a thermal curing mold core sand system which is high in curing speed, good in humidity resistance and capable of meeting the casting technology in strength can be improved.

Description

Technical field [0001] The invention relates to a binder, in particular to a phosphate binder; the invention also relates to a preparation method of the binder. Background technique [0002] Casting is an important foundation of the machinery manufacturing industry, but it is also the most polluting sector in the machinery industry. The binder in the molding material is one of the main pollution sources in the foundry industry. It is the main source of various harmful or toxic gases and solid substances. Therefore, starting from the source of the binder that is the main pollution source in foundry production, the development of green binder for foundry and its molding (core) process is an important way to transform traditional industries and make them conform to the harmonious scientific development concept. Phosphate-based casting binder, not only does not produce irritating gas, is non-combustible, non-toxic, but also has excellent characteristics of high strength, good collap...

Claims

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Application Information

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IPC IPC(8): B22C1/18
Inventor 姚伟
Owner 姚伟
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