Method for preparing environment-friendly type casting adhesive agent

A binder and environment-friendly technology, applied in casting molding equipment, casting molds, cores, etc., can solve the problems of complex synthesis process, high casting cost, environmental pollution, etc., achieve simple production process, reduce casting cost, heat The effect of low decomposition temperature

Inactive Publication Date: 2008-10-01
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the binders supplied in the domestic market mainly include various synthetic greases, synthetic resins, and modified water glass. During the molding and pouring process, a large amount of smoke and some toxic and harmful gases of aldehydes and phenols will be released, causing serious environmental pollution; although the water glass binder sand does not emit harmful gases, the molding sand has poor collapsibility, and the old sand has poor reproducibility. The accumulation of old sand not only pollutes the environment, but also increases casting costs
In order to solve the above problems, some hydrophilic binders have appeared in the prior art, such as the casting binder provided by CN02144185. Although this binder solves the environmental protection problem, the synthesis process is complicated, and the Molding sand needs to be solidified by baking, and the casting cost is high, which is difficult for users to accept

Method used

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  • Method for preparing environment-friendly type casting adhesive agent

Examples

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Effect test

preparation example Construction

[0018] The preparation process of casting binder of the present invention:

[0019] (1) Add animal glue and water to the reaction kettle, soak at room temperature for 30 minutes, heat and dissolve the animal glue after swelling to obtain animal glue liquid.

[0020] (2) In the prepared animal glue (1), add the fatty acid, alcohol and catalyst in the formulated amount, and react at 80-100° C. for 60-90 minutes. Then, when the temperature is lowered to 40° C., an anticoagulant in a formulated amount is added, and the reaction is continued for 30 minutes, and then the material is discharged to obtain the casting binder of the present invention.

[0021] Mold preparation process: add quartz sand, environment-friendly casting binder, and hardening accelerator into the sand mixer according to the formula, mix evenly, pour into the mold for compaction, and blow carbon dioxide to make the mold type hardening. It is characterized in that the weight percentage of each component in the...

Embodiment 1

[0026] An environment-friendly foundry binder, which is composed of animal glue, sebacic acid, ethanol, concentrated sulfuric acid, anticoagulant and water, and the weight percentage of each component content is:

[0027] Glue 30 Sebacic acid 20

[0028] Alcohol 10 Anticoagulant 10

[0029] concentrated sulfuric acid 1 water balance.

[0030] First add animal glue and water into the reaction kettle, soak at room temperature for 30 minutes, heat and dissolve the animal glue after swelling to obtain animal glue glue. Then add sebacic acid, ethanol and concentrated sulfuric acid according to the formula, and react at 80-100°C for 60-90 minutes. Then, when the temperature is lowered to 40°C, the anticoagulant in the prescribed amount is added, and the reaction is continued for 30 minutes before discharge to obtain an environment-friendly casting binder.

[0031] The preparation method of the casting mold: add 80g of quartz sand, 10g of environmentally friendly casting binder an...

Embodiment 2

[0033] An environment-friendly foundry binder, which is made of animal glue, oleic acid C 18 , ethanol, concentrated sulfuric acid, anticoagulant and water, etc., the weight percentage of each component content is:

[0034] Glue 45 Oleic C 18 20

[0035] Alcohol 10 Anticoagulant 15

[0036] concentrated sulfuric acid 1.5 water balance.

[0037] First add animal glue and water into the reaction kettle, soak at room temperature for 30 minutes, heat and dissolve the animal glue after swelling to obtain animal glue glue. Then add oleic acid, ethanol and concentrated sulfuric acid according to the formula, and react at 80-100°C for 60-90 minutes. Then, when the temperature is lowered to 40°C, the anticoagulant in the prescribed amount is added, and the reaction is continued for 30 minutes before discharge to obtain an environment-friendly casting binder.

[0038] The preparation process of the mold is carried out by the same mold preparation process as in Example 1.

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Abstract

The invention discloses a preparation method of an environment-friendly casting binder, which relates to an improvement of a casting binder, and provides the preparation method of an environment-friendly casting binder that does not discharge noxious and harmful gases in the producing and using process. The preparation method of the environment-friendly casting binder adopts the technical proposal which comprises animal glue, fatty acid, alcohol, an anti-gelling agent and a catalyst with the content of each component by weight is: 30 to 60 units of animal glue, 20 to 40 units of fatty acid (or C12-C18 organic acid), 10 to 20 units of alcohol, 10 to 20 units of anti-gelling agent, 1 to 2 units of mineral acid catalyst and the remaining of water.

Description

Technical field: [0001] The present invention relates to an improvement of a foundry binder. Background technique: [0002] At present, the binders supplied in the domestic market mainly include various synthetic greases, synthetic resins, and modified water glass. During the molding and pouring process, a large amount of smoke and some toxic and harmful gases of aldehydes and phenols will be released, causing serious environmental pollution; although the water glass binder sand does not emit harmful gases, the molding sand has poor collapsibility, and the old sand has poor reproducibility. The accumulation of old sand not only pollutes the environment, but also increases the casting cost. In order to solve the above problems, some hydrophilic binders have appeared in the prior art, such as the casting binder provided by CN02144185. Although this binder solves the environmental protection problem, the synthesis process is complicated, and the Molding sand needs to be solid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/24
Inventor 李英民娄桂艳
Owner SHENYANG POLYTECHNIC UNIV
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