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A kind of hot core sand inorganic binder and preparation method thereof

An inorganic binder and thermal core technology, applied in cores, manufacturing tools, casting molding equipment, etc., can solve problems affecting workers' health, bad working environment, bad smell, etc., and achieve significant economic and social benefits, Good stability and high tensile strength

Active Publication Date: 2019-10-25
SUZHOU SUZHU HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hot core making is to inject resin-coated sand into a hot mold at about 200°C for curing and molding. The heated resin in the production site will cause large smoke and release unpleasant odors. The sand is solidified by triethylamine, which emits into the air, and the smell is very unpleasant, which also causes a very bad working environment and seriously affects the health of workers. When pouring metal, the resin will decompose, gasify, and burn when it encounters high-temperature molten metal, decomposing and releasing dioxin, a carcinogen recognized worldwide, which will also cause damage to the environment

Method used

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  • A kind of hot core sand inorganic binder and preparation method thereof
  • A kind of hot core sand inorganic binder and preparation method thereof
  • A kind of hot core sand inorganic binder and preparation method thereof

Examples

Experimental program
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Effect test

preparation example

[0024] The phosphate hot core sand inorganic binder synthesis of the present application invention and the example of sand mold preparation are as follows:

example 1

[0026] Take by weighing 53 kg of 85% industrial phosphoric acid, 11 kg of aluminum hydroxide powder, 1.92 kg of boric acid, 0.89 kg of silicic acid, 1.14 kg of magnesium oxide, 0.05 kg of copper oxide, and 32 kg of water.

[0027] Preparation steps:

[0028] 1. Add 53kg of industrial phosphoric acid, 11kg of aluminum hydroxide powder and 32kg of water into the three-port reaction kettle, turn on the stirrer and heater, and slowly heat to 180-200°C;

[0029] 2. After the reaction in the reactor is completed, add 1.92 kg of boric acid into the reactor, continue heating and stirring until the solution in the reactor is transparent;

[0030] 3. Add 0.89 kg of silicic acid, continue heating and stirring until the solution in the reaction kettle is transparent;

[0031] 4. Add 1.14 kg of magnesium oxide, continue heating and stirring until the solution is transparent;

[0032] 5. Add 0.05 kg of copper oxide, continue heating and stirring until the solution is transparent;

[0033...

example 2

[0038] Take by weighing 52 kg of 85% industrial phosphoric acid, 11 kg of aluminum hydroxide powder, 2.44 kg of boric acid, 0.92 kg of silicic acid, 1.57 kg of magnesium oxide, 0.07 kg of copper oxide, and 32 kg of water.

[0039] Preparation steps:

[0040] 1. Add 52kg of industrial phosphoric acid, 11kg of aluminum hydroxide powder and 32kg of water into the three-port reaction kettle, turn on the stirrer and heater, and slowly heat to 180-200°C;

[0041] 2. After the reaction in the reactor is completed, add 2.44 kg of boric acid into the reactor, continue heating and stirring until the solution in the reactor is transparent;

[0042] 3. Add 0.92 kg of silicic acid, continue heating and stirring until the solution in the reaction kettle is transparent;

[0043] 4. Add 1.57 kg of magnesium oxide, continue heating and stirring until the solution is transparent;

[0044] 5. Add 0.07 kg of copper oxide, continue heating and stirring until the solution is transparent;

[0045...

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Abstract

The invention provides a hot core sand inorganic binder and a preparing method thereof. The hot core sand inorganic binder comprises the following components including, by weight, 50%-53% of phosphoric acid, 11%-12% of aluminum hydroxide, 1.87%-2.50% of boric acid, 0.89%-0.92% of silicic acid, 1.14%-1.57% of magnesium oxide, 0.05%-0.07% of copper oxide and 32%-34% of water. The hot core sand inorganic binder is non-poisonous, tasteless and free of pollution, the viscosity is low, the good mobility is achieved after the binder is mixed with sand, the production requirement of a hot box core shooting machine is met, a heated and cured sand mould or sand core has the good stability and high strength of extension, the product has the wide application prospects, and the economic benefit and thesocial benefit are remarkable.

Description

technical field [0001] The invention belongs to the field of foundry industry, and in particular relates to an inorganic binder for hot core sand and a preparation method thereof. Background technique [0002] At present, the sand molds or sand cores for the casting of cylinder blocks and cylinder heads of automobiles are mainly formed by the hot box core-making method of coated sand and the cold-box core-making method of triethylamine. Both methods used organic resin binders, which have been recognized as harmful substances. Hot core making is to inject resin-coated sand into a hot mold at about 200°C for curing and molding. The heated resin in the production site will cause large smoke and release unpleasant odors. The sand is solidified by triethylamine, which emits into the air, and the smell is very unpleasant, which also causes a very bad working environment and seriously affects the health of workers. When pouring metal, the resin will decompose, gasify, and burn wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/18
CPCB22C1/183B22C1/185B22C1/186
Inventor 夏露任彦臻张茜张友寿刘栋周磊
Owner SUZHOU SUZHU HEAVY IND
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