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Binder for chemical hardened sand mold casting

A sand casting and chemical hardening technology, applied in the field of sand casting, can solve the problems of operators and air pollution, increase investment costs, etc., and achieve the effects of strong safety and environmental protection, improving casting quality, and improving sand formability.

Inactive Publication Date: 2017-05-31
CHIZHOU GONGHE MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if resin is used as a binder, a large amount of toxic organic gas is likely to be generated after pouring, which seriously pollutes the operator and the air. Air purification equipment is required, which increases the input cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Add 12 parts of white beeswax to 10 parts of paraffin oil, heat to 65-70 ° C and mix for 10 minutes, then add 8 parts of sulfated castor oil and 3 parts of tributyl citrate, continue to heat and mix for 10 minutes to obtain the material I;

[0020] (2) Add 7 parts of polyethylene glycol and 2 parts of nano-alumina to 30 parts of activated clay, mix evenly, and microwave at a microwave frequency of 2450MHz and a power of 800W for 10 minutes, and then add 8 parts after the mixture is naturally cooled to 45-50°C. 1 part of sodium carboxymethyl starch and 4 parts of terpene resin, mixed uniformly to obtain material II;

[0021] (3) Add material I, 10 parts of modified sepiolite powder, 6 parts of glycerol polyoxyethylene ether, 5 parts of furfuryl alcohol and 1 part of ferric chloride to material II, and mix well.

[0022] Preparation of modified sepiolite powder: add 6 parts of nano graphite powder and 3 parts of nano rubber powder to 100 parts of sepiolite powder, fi...

Embodiment 2

[0024] (1) Add 10 parts of white beeswax to 15 parts of paraffin oil, heat to 65-70 ° C and mix for 10 minutes, then add 10 parts of sulfated castor oil and 5 parts of tributyl citrate, continue to heat and mix for 10 minutes to obtain the material I;

[0025] (2) Add 10 parts of polyethylene glycol and 3 parts of nano-alumina to 40 parts of activated clay, mix well, and then microwave at a microwave frequency of 2450 MHz and a power of 800 W for 10 minutes, and then add 6 parts after the mixture is naturally cooled to 45-50 ° C. 1 part of sodium carboxymethyl starch and 6 parts of terpene resin, mixed uniformly to obtain material II;

[0026] (3) Add material I, 12 parts of modified sepiolite powder, 8 parts of glycerol polyoxyethylene ether, 3 parts of furfuryl alcohol and 1 part of ferric chloride to material II, and mix well.

[0027] Preparation of modified sepiolite powder: Add 8 parts of nano graphite powder and 5 parts of nano rubber powder to 120 parts of sepiolite p...

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Abstract

The invention discloses a binder for chemical hardened sand mold casting, and relates to the technical field of sand mold casting. The binder is composed of, by weight, 30-40 parts of activated clay, 10-15 parts of modified sepiolite powder, 10-15 parts of cera alba, 10-15 parts of paroline, 8-13 parts of sulfated castor oil, 7-11 parts of polyethylene glycol, 5-10 parts of sodium carboxymethyl starch, 5-10 parts of glycerol polyoxyethylene ether, 4-8 parts of terpene resin, 3-5 parts of furfuryl alcohol, 3-5 parts of tributyl citrate, 2-3 parts of nanometer aluminum oxide and 1-2 parts of ferric trichloride. The binder is proper in viscosity, is capable of being fully mixed with chemical hardened sand, and fully improves the sand forming performance and quality of a casting. The sand cleaning efficiency of the casting is high, and a sand adhesion phenomenon is avoided. In addition, poisonous organic gas is not generated during pouring of the casting, and the safety and environmentally friendliness are high.

Description

[0001] Technical field: [0002] The invention relates to the technical field of sand casting, in particular to a chemically hardened sand casting binder. [0003] Background technique: [0004] The outer sand molds used in sand casting are divided into three types: clay wet sand molds, clay dry sand molds and chemically hardened sand molds according to the binder used in the sand and the way to build its strength. The molding sand used in chemically hardened sand molds is called chemically hardened sand, and its binder is generally a substance that can undergo molecular polymerization under the action of a hardener and then become a three-dimensional structure. Various synthetic resins and water glass are commonly used. However, the residual strength of the molding sand made of water glass is too high after the casting is poured, which makes it very difficult to remove the sand from the casting, and the sand removal efficiency is low. In order to improve the sand cleaning eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/16
CPCB22C1/167
Inventor 刘章清朱满平
Owner CHIZHOU GONGHE MACHINE
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