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Water glass ester hardening molding sand suitable for casting alkaline high manganese steel casting materials

A technology of high manganese steel and water glass, which is applied in casting molding equipment, molds, cores, etc., can solve the problems of poor core sand collapsibility, etc., and achieve the effects of improving quality, improving collapsibility, and improving surface quality

Active Publication Date: 2019-11-26
广西长城机械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a sodium silicate hardened molding sand suitable for casting alkaline high manganese steel casting materials to solve the problems of poor collapsibility of the mold and core sand after pouring caused by the traditional carbon dioxide hardening process

Method used

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Examples

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Effect test

preparation example Construction

[0036] The preparation method of the described water glass resin hardened molding sand that is suitable for casting alkaline high manganese steel casting material, comprises the following steps:

[0037] (1) The raw materials are prepared by pulverizing and ball milling into a powder with a particle size greater than 40 meshes. According to the weight parts of the formula, limestone sand, chromite sand, corundum sand, pearl sand, polyvinylidene fluoride , zirconium dioxide fibers were stirred and mixed for 1-1.5 minutes to obtain a powder mixture;

[0038] (2) Add the powder mixture into a sand mixer, pump xylitol organic acid ester, paraffin-based petroleum calcium sulfonate, and water glass into the sand mixer respectively with a liquid pump, so that the powder The mixture is mixed for 1-1.5 minutes to make a semi-finished product;

[0039] (3) Add the semi-finished product into the sand box where the mould is placed, and compact it for 20-60 minutes, so that the molding sa...

Embodiment 1

[0041]A kind of sodium silicate resin hardened molding sand suitable for casting alkaline high manganese steel casting materials, which includes the following raw materials in parts by weight: 216 parts of limestone sand, 3 parts of chromite sand, 5 parts of corundum sand, and 3 parts of pearl sand 3 parts, 3 parts of water glass solution, 0.6 part of xylitol organic acid ester, 0.4 part of polyvinylidene fluoride, 0.5 part of paraffin-based petroleum calcium sulfonate, 0.4 part of zirconium dioxide fiber;

[0042] The calcium oxide content in the limestone sand is 86.53%, and the particle size is 60 mesh;

[0043] The grain size of described chromite sand is 40 orders;

[0044] The alumina content in the corundum sand is 98.93%, and the particle size is 50 mesh;

[0045] The particle size of described pearl sand is 40 orders;

[0046] Described water glass solution modulus is 2.6;

[0047] The xylitol organic acid ester is prepared by referring to the process of Example 7 ...

Embodiment 2

[0055] A kind of sodium silicate hardened molding sand suitable for casting alkaline high manganese steel casting materials, which includes the following raw materials in parts by weight: 95 parts of limestone sand, 2 parts of chromite sand, 2 parts of corundum sand, and 3 parts of pearl sand 1 part, 2 parts of water glass solution, 0.1 part of xylitol organic acid ester, 0.3 part of polyvinylidene fluoride, 0.4 part of paraffin-based petroleum calcium sulfonate, 0.2 part of zirconium dioxide fiber;

[0056] The calcium oxide content in the limestone sand is 81.54%, and the particle size is 40 mesh;

[0057] The grain size of described chromite sand is 20 orders;

[0058] The alumina content in the corundum sand is 99.03%, and the particle size is 30 mesh;

[0059] The particle size of described pearl sand is 10 orders;

[0060] Described water glass solution modulus is 2.2;

[0061] The xylitol organic acid ester is prepared by referring to the process of Example 7 in "A s...

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PUM

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Abstract

The invention discloses water glass ester hardening molding sand suitable for casting alkaline high manganese steel casting materials. The water glass ester hardening molding sand comprises, by weight, 94-210 parts of limestone sand, 1-5 parts of chromite sand, 2-6 parts of emery, 2-5 parts of ceramsite, 2-5 parts of a water glass solution, 0.1-0.8 part of xylitol organic ester, 0.3-0.5 part of polyvinylidene fluoride, 0.4-0.8 part of paraffin base petroleum calcium sulfonate and 0.1-0.5 part of zirconium dioxide fibre. The water glass ester hardening molding sand suitable for casting the alkaline high manganese steel casting materials is prepared by the steps of crushing, mixing, compacting, grease hardening and the like. The method can solve the problems that the collapsibility of the cast molding sand is poor by the adoption of a traditional carbon dioxide hardening process, the residual strength of the water glass sand can be reduced, the surface quality of the casting is improved,the sand cleaning time of the casting is shortened, and the recycling of the water glass old sand becomes possible; and in addition, the emission of strong alkaline water glass waste sand can be reduced, and the environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the field of casting materials, in particular to water glass resin hardened molding sand suitable for casting alkaline high manganese steel casting materials. Background technique [0002] Sand casting is a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. The basic raw materials for making sand molds are foundry sand and sand binder. [0003] Using the traditional carbon dioxide hardening process, the bonding strength of water glass itself has not been fully utilized, and the addition of water glass is high (generally up to 7%-8%), resulting in poor collapse ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/10B22C1/02B22C1/18
CPCB22C1/02B22C1/10B22C1/188
Inventor 赵四勇廖钊康建田辉周正
Owner 广西长城机械股份有限公司
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