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Pre-coated sand added with graphene and having rapid heat radiation effect and preparation method thereof

A graphene, fast heat dissipation technology, applied in metal processing equipment, manufacturing tools, casting molding equipment, etc., can solve the problems of affecting the quality of castings, poor heat resistance, casting pores, etc., to increase fluidity and permeability, and not easy to crack. Deformation and fluidity-enhancing effects

Inactive Publication Date: 2015-06-03
FANCHANG COUNTY JINKE CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coated sand in the prior art has problems such as poor heat resistance and poor heat dissipation that cause pores in the casting, which affects the quality of the casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be described in detail below through specific examples.

[0015] A coated sand with fast heat dissipation added with graphene, which is composed of the following parts by weight (kg): quartz sand 80, pearl sand 8, graphene 3, urotropine 0.6, water 2, calcium stearate 0.3, thermoplastic Phenolic resin 5, mullite fiber 2, silane coupling agent KH-550 1, synergist 5;

[0016] The synergist is prepared from the following parts by weight (kg): corn stalk 4, starch 2, water glass 3, calcium oxide 1.5, magnesium chloride 1, graphene 4, clay 20, zircon powder 9, phthalic acid Dibutyl ester 3, water 9; the preparation method is as follows: dry the corn stalks and crush them into 100-mesh powder, mix them with pottery clay and starch, mix well, add water and mix well, control the temperature at 60°C-80°C, keep it for 1 hour, then add Mix the remaining ingredients except water glass and dibutyl phthalate for 20 minutes, then add water glass and dibutyl ...

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Abstract

The invention discloses pre-coated sand added with graphene and having rapid heat radiation effect. The pre-coated sand is characterized by being prepared from the following raw materials in parts by weight: 80-90 parts of quartz sand, 8-10 parts of electric smelting ceramsite, 3-5 parts of graphene, 0.6-0.8 part of urotropin, 2-3 parts of water, 0.3-0.35 part of calcium stearate, 5-6 parts of thermoplastic phenolic resin, 2-4 parts of mullite fibers, 1-2 parts of a silane coupling agent KH-550 and 5-7 parts of a synergist. According to the pre-coated sand, the synergist is added on the basis of a traditional pre-coated sand formula and is prepared by a special process, so that the flowability, the air permeability, the heat radiation and the strength of the pre-coated sand are enhanced; the surface is dense and is not easy to crack and deform; proper amount of the electric smelting ceramsite is matched with the quartz sand so that the flowability and the air permeabilityof the product are enhanced; the mullite fibers are added so that the fire resistance is enhanced; and the pre-coated sand has the advantages of rapid heat radiation, high temperature resistance, high size precision of a produced casting, smooth surface, convenience for storage and the like, and is widely applied in recent years day by day.

Description

technical field [0001] The invention relates to the technical field of molding sand, in particular to coated sand with fast heat dissipation added with graphene and a preparation method thereof. Background technique [0002] Coated sand refers to the molding sand or core sand that is covered with a solid resin film on the surface of the sand grains before molding. In recent years, the production process of thermal coated sand has been widely used, that is, preheat the sand to a certain temperature, add resin to melt it, stir to coat the resin on the surface of the sand, add urotropine aqueous solution and lubricant, Cool, crush and sieve to obtain coated sand. Due to the advantages of high strength, low gas generation, high dimensional accuracy of production castings, smooth surface and easy storage, coated sand has been widely used in recent years. The coated sand in the prior art has problems such as poor heat resistance and poor heat dissipation which cause pores in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02
CPCB22C1/00B22C1/02
Inventor 俞学林
Owner FANCHANG COUNTY JINKE CASTING
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