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High-thermal-conductivity easily-demolded modified composite water-glass sand for steel castings and preparation method thereof

A technology of water glass sand and high thermal conductivity, which is applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of restricting the application of water glass sand, difficulty in recycling, poor collapsibility, etc. Improved strength and thermal conductivity, and easy release from the mold

Inactive Publication Date: 2015-12-02
陈传松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The molding sand using water glass as a binder has the advantages of simple equipment, convenient operation, non-toxic and tasteless, and low cost. However, it also has many disadvantages. The obvious defects are mainly low strength, poor collapsibility, and difficulty in recycling. , which restricts the application of water glass sand, so it is necessary to develop a modified water glass sand with high efficiency, low toxicity and effective improvement of casting quality, so as to meet the needs of the industry and improve the quality of castings

Method used

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Embodiment Construction

[0010] A modified composite water glass sand with high thermal conductivity and easy demoulding for steel castings, which is prepared from the following raw materials in parts by weight: light-burned magnesium oxide 5, 80 mesh river sand 20, 60 mesh quartz sand 28, 150 mesh weight Crystal powder 10, 80 mesh old sand 35, nano boron nitride 1.5, modified water glass adhesive 3, sodium dodecylbenzene sulfonate 0.1, water 14.

[0011] The modified water glass adhesive is made of the following raw materials in parts by weight: water glass 16 of 55 degrees Baume, nanometer mesoporous alumina 2.5, magnesium aluminum silicate 0.3, carboxymethyl cellulose 0.3, solid content 20% silica sol 5, lithium tetraborate 0.1, urotropine 0.02, glucose 1.5, barium molybdate 0.1; the preparation method is: first put nano-mesoporous alumina into silica sol, ultrasonically oxidize nano-mesoporous Disperse aluminum evenly in the solution, then add water glass, continue to stir and disperse for 20 minu...

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Abstract

The invention discloses high-thermal-conductivity easily-demolded modified composite water-glass sand for steel castings. Used sand, river sand, quartz sand, baryta powder and the like with different grain diameters and different proportions are selected as sand materials for preparing the composite sand. The composite sand is good in air permeability and easy to form; nano-sized boron nitride is added so that the strength and capacity of heat conduction can be greatly improved; in the casting process, the molding sand is quick in heat conduction and heat dissipation and not likely to adhere to a metal surface, and demolding is easy; compared with traditional water glass adhesives, modified water glass adhesives have higher strength and collapsibility, the utilization rate is higher, and the quality of the castings is obviously improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing molding sand for steel casting, in particular to a modified composite water glass sand with high thermal conductivity and easy demoulding for steel castings and a preparation method thereof. Background technique [0002] In the casting process of steel parts, the quality of the molding sand is directly related to the quality of the casting. The molding sand is mainly made of sand, adhesives and auxiliary materials mixed according to different proportions. The adhesive is a type of It is an important molding material, and its overall quality is directly related to the surface quality and internal quality of castings. At present, the most widely used adhesives are mainly inorganic adhesives represented by water glass sand and resins represented by furan resin. glue. [0003] Molding sand using water glass as a binder has the advantages of simple equipment, convenient operation, non-toxic and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18
Inventor 陈传松陈小乐
Owner 陈传松
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