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Furan resin self-hardening sand and preparation method thereof

A technology of furan resin and no-bake sand, which is applied in the field of foundry, can solve the problems of poor fluidity, reduced strength, and false filling of coarse silica sand, and achieve good hardening effect, low odor, and improved moisture resistance.

Active Publication Date: 2014-10-22
WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resin no-bake sand of this invention has high strength, good air permeability and a small amount of gas generation, but the coarse silica sand has poor fluidity, which will lead to poor filling and reduced strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In this embodiment, a furan resin no-bake sand is made from the following raw materials in parts by weight: 100 parts of silica sand, 12 parts of furan resin, 10 parts of epoxy resin, 6 parts of glycerin aqueous solution, 3 parts of silane coupling agent, 12 parts of titanium dioxide, 12 parts of boron carbide, 3 parts of hydroxypropyl-β-cyclodextrin, and 10 parts of polyimide; the silica sand is composed of new sand and old sand in a weight ratio of 1:4, and the aqueous glycerin The mass concentration of glycerol in the medium is 12%.

[0017] The silica sand passes through a 200-mesh sieve, and the silica content in the silica sand is greater than 98%, the mud content is less than 0.1%, and the loss on ignition is less than 0.2%.

[0018] The preparation method of a kind of furan resin no-bake sand, mixes silica sand with polyimide over 200 meshes, and sequentially adds silane coupling agent, titanium dioxide, boron carbide, hydroxypropyl-β-cyclodextrin, glycerin aque...

Embodiment 2

[0020] In this embodiment, a furan resin no-bake sand is made of the following raw materials in parts by weight: 100 parts of silica sand, 15 parts of furan resin, 8 parts of epoxy resin, 5 parts of glycerin aqueous solution, 4 parts of silane coupling agent, 15 parts of titanium dioxide, 15 parts of boron carbide, 4 parts of hydroxypropyl-β-cyclodextrin and 8 parts of polyimide; the silica sand is composed of new sand and old sand in a weight ratio of 1:4, and the glycerin aqueous solution The mass concentration of glycerol in the medium is 10%.

[0021] The silica sand passes through a 200-mesh sieve, and the silica content in the silica sand is greater than 98%, the mud content is less than 0.1%, and the loss on ignition is less than 0.2%.

[0022] The preparation method of a kind of furan resin no-bake sand, mixes silica sand with polyimide over 200 meshes, and sequentially adds silane coupling agent, titanium dioxide, boron carbide, hydroxypropyl-β-cyclodextrin, glycerin ...

Embodiment 3

[0024] In this embodiment, a furan resin no-bake sand is made of the following raw materials in parts by weight: 100 parts of silica sand, 10 parts of furan resin, 12 parts of epoxy resin, 8 parts of glycerin aqueous solution, 2 parts of silane coupling agent, 10 parts of titanium dioxide, 10 parts of boron carbide, 2 parts of hydroxypropyl-β-cyclodextrin, and 12 parts of polyimide; the silica sand is composed of new sand and old sand in a weight ratio of 1:4, and the aqueous glycerin The mass concentration of glycerol in the medium is 15%.

[0025] The silica sand passes through a 200-mesh sieve, and the silica content in the silica sand is greater than 98%, the mud content is less than 0.1%, and the loss on ignition is less than 0.2%.

[0026] The preparation method of a kind of furan resin no-bake sand, mixes silica sand and polyimide over 200 meshes, sequentially adds silane coupling agent, titanium dioxide, boron carbide, hydroxypropyl-β-cyclodextrin, glycerin aqueous sol...

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PUM

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Abstract

The invention discloses furan resin self-hardening sand and a preparation method thereof. The self-hardening sand is prepared from the following raw materials: silica sand, furan resin, epoxy resin, glycerin water solution, a silane coupling agent, titanium dioxide, boron carbide, hydroxypropyl-beta-cyclodextrin and pyralene. The preparation method comprises the following steps of mixing silica sand with the size of larger than 200 meshes with pyralene, sequentially feeding the silane coupling agent, titanium dioxide, boron carbide, hydroxypropyl-beta-cyclodextrin, glycerin water solution, epoxy resin and furan resin, and rapidly stirring until the raw materials are fully mixed, wherein the stirring speed is 120r / min. The preparation method is simple; all the raw materials are matched and act; the silica sand can achieve good bonding property and curing effect by virtue of furan resin, epoxy resin, silane coupling agent and pyralene, and glycerin water solution, titanium dioxide, boron carbide and hydroxypropyl-beta-cyclodextrin are capable of improving the humidity resistance, the fluidity and the compressive strength of the silica sand.

Description

technical field [0001] The invention relates to a furan resin self-setting sand and a preparation method thereof, belonging to the technical field of casting. Background technique [0002] Resin self-bake sand is generally prepared by mixing silica sand, resin and hardener. Commonly used resins are furan resin, resole phenolic resin and urethane resin. The sand mold made of this kind of molding sand has high strength, accurate size, good collapsibility and low energy consumption. It can be used in the production of cast steel, cast iron and non-ferrous alloy castings. The surface quality and dimensional accuracy of the castings are high. Resin self-setting sand is a promising molding sand. [0003] The application number is 201010152282.9 "Resin No-bake Sand for Magnesium Alloy Sand Casting and Its Preparation Method", which discloses a no-bake sand whose components by weight percentage are: fine silica sand 51-100%, coarse silica sand 0-50%, The amount of resin added is ...

Claims

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Application Information

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IPC IPC(8): B22C1/22
Inventor 浦巧生
Owner WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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