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A kind of additive for coated sand

A technology of additive and coated sand, applied in the field of coated sand, can solve the problem of poor high temperature resistance of coated sand, and achieve the effects of improving high temperature resistance, reducing high temperature expansion and increasing melting point

Active Publication Date: 2020-01-07
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the existing method adopts the addition of inorganic additives or organic additives, the high temperature resistance of the coated sand is still not good.

Method used

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  • A kind of additive for coated sand
  • A kind of additive for coated sand
  • A kind of additive for coated sand

Examples

Experimental program
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Embodiment 1

[0031] An additive for coated sand, comprising the following raw material components in parts by weight: 100 parts of silicon micropowder with a particle size of 38-110 μm, and the average particle size is less than 75 μm; ultrafine alumina powder with a particle size of 40-60 μm 1 part, Al in superfine alumina powder 2 o 3 The content is greater than 60%; 1 part of spherical ceramic powder with a particle size of 0.5-100 μm, the average particle size is less than 50 μm, and no more than 2% of 75 μm or more; 4 parts of reducing additives with a particle size of 40-80 μm; the particle size is 100- 0.1 part of 180 μm composite polymer material.

[0032] Reductive additive comprises the mixture of graphite powder and metal salt compound, and the mass ratio of graphite powder and metal salt compound is 1:0.5~1:6.5, and the mass ratio of graphite powder and metal salt compound is 1 in the present embodiment: 3. The composite polymer material includes a mixture of surfactant and s...

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PUM

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Abstract

The invention discloses an additive applied to precoated sand. The additive comprises the following raw materials in parts by weight: 100 parts of silica powder, 1-10 parts of superfine alumina powder, 1-15 parts of spherical ceramic powder, 4-50 parts of a reductive additive and 0.1-10 parts of a composite high-molecular material. The additive disclosed by the invention can improve the performances such as crushing resistance, smelting point, high-temperature fluidity, high-temperature compressive strength, caking resistance, expansion rate, expansion behavior and high temperature resistancetime of the precoated sand and an organic high-molecular resin composite material.

Description

technical field [0001] The invention belongs to the technical field of coated sand, and in particular relates to an additive for coated sand. Background technique [0002] Resin coated sand is one of the main auxiliary materials in the foundry industry. In the casting process, resin-coated sand is used to prepare sand cores, assemble cores, and pour to achieve the purpose of preparing castings. [0003] Casting resin-coated sand is composed of refractory aggregate and polymer resin. When making cores, the resin-coated sand is heated in the mold and undergoes a curing reaction, and the granular coated sand is consolidated into a sand core with a certain shape. , individual sand cores are combined or used alone to cast metal castings. Castings are divided into non-ferrous metal casting and ferrous metal casting according to different types of materials. The pouring temperature of non-ferrous metal casting is lower. Cast aluminum in non-ferrous metal casting is usually at 700...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 熊帆熊鹰王丽峰
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP