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Hydrophilic adhesive for casting and its prepn

A binder and hydrophilic type technology, which is applied to casting molding equipment, molds, cores, etc., can solve the problems of low refractoriness of sand molds, serious pollution of the environment, and difficulty in sand cleaning of castings, so as to save fuel and man-hours, The effect of abundant resources and low product cost

Inactive Publication Date: 2003-03-19
武国和
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The bonding materials used in the foundry industry mainly include tung oil, resin, vacuum residue oil, and synthetic fat oil. Although these materials have good bonding performance, they have many disadvantages when used. For example, the raw sand needs to be baked during the core making process. Not only The operation is complicated, and the smoke is large, and the environment is very polluted; the price is expensive, which increases the cost of castings, and is difficult for users to accept, which limits the application
In order to overcome the above shortcomings, the prior art uses non-oily resin binders, which also have disadvantages such as easy sticking to the mold, low refractory strength of the sand mold, moisture regain of the sand core, and difficulty in sand cleaning of the casting.

Method used

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  • Hydrophilic adhesive for casting and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A casting hydrophilic binder is composed of corn sugar, corn wine, collagen, corn starch, water, soybean oil, acrylamide and sulfuric acid, and its weight percentage is:

[0026] Candy Corn 35% Corn Wine 7% Collagen 20%

[0027] Corn Starch 4% Soybean Oil 1% Acrylamide 2%

[0028] Sulfuric acid 1% water 30%.

[0029] The production method of this embodiment (see figure 1 ):

[0030] 1. According to the conventional method, the raw corn is crushed, soaked, saccharified with saccharifying enzyme, concentrated to obtain corn sugar; corn flour is made, fermented with alcoholic enzyme, and corn wine is prepared.

[0031] 2. Pour 30% water into the melter, heat up to 80°C, then add 20% collagen, continue to heat up to 90°C, and stir evenly.

[0032] 3. Inject the stirred protein solution into two reaction kettles A and B respectively, then add 4% cornstarch and 1% sulfuric acid in kettle A, heat up to 90°C, and react for 6 hours to obtain base material A ; In the B kettl...

Embodiment 2

[0037] A kind of hydrophilic binder for casting, its components and content (percent by weight) are as follows:

[0038] Corn Sugar 25% Corn Wine 5% Collagen 15%

[0039] Corn Starch 3% Flax Oil 0.5% Nitrogen Free Resin 0.5%

[0040] Hydrochloric acid 0.5% water 49%.

[0041] production method (see figure 1 ):

[0042] 1. The raw corn is made into corn sugar and corn wine according to the conventional process.

[0043] 2. Pour 49% water into the melter, heat up to 60°C, then add 15% collagen, continue to heat up to 80°C, and stir.

[0044] 3. Divide the stirred protein solution into two reaction kettles A and B, then add 3% cornstarch and 0.5% hydrochloric acid in kettle A, heat up to 80°C, and react for 4 hours to obtain base A ; In the B kettle, add 5% corn wine, heat up to 80 ℃, react for 4 hours, and obtain B base material.

[0045] 4. Inject the above-reacted base materials A and B into the C reactor at the same time, then add 25% corn sugar, raise the temperature a...

Embodiment 3

[0049] A kind of hydrophilic binder for casting, its components and content (percent by weight) are as follows:

[0050] Corn hydrolyzate 30%, corn wine 6%, collagen 18%, corn starch 3.2%, soybean oil 0.7%, nitrogen-free resin 1%, phosphoric acid 0.7%, water 40%.

[0051] production method (see figure 1 ):

[0052] 1. The raw corn is processed according to the general method: corn flour milling, inorganic acid hydrolysis to obtain corn hydrolyzate-glucose liquid; corn milling, fermentation with alcohol enzyme to obtain corn wine.

[0053] 2. Pour 40% water into the melter, heat up to 70°C, then add 18% collagen, continue to heat up to 85°C, and stir.

[0054] 3. Put the stirred protein solution in two reaction kettles A and B respectively, then add 3.2% cornstarch and 0.7% phosphoric acid in kettle A, heat up to 85°C, and react for 5 hours to obtain base A. material; 6% corn wine was added in kettle B, the temperature was raised to 85°C, and the reaction was carried out for...

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Abstract

The present invention relates to casting material. The hydrophilic adhesive for casting consists of corn saccharide, corn wine, collagen, corn starch, water, desiccant, reinforcer and assistant. The corn saccharide and corn wine are produced with corn material and via conventional process and are made to react with collagen to produce one kind of high grade fat compound. The fat compound is then reacted with the other material to produce the adhesive.

Description

Technical field [0001] The invention belongs to a molding material for castings, and relates to a binder of core sand for casting and a preparation method thereof. Background technique [0002] The bonding materials used in the foundry industry now mainly include tung oil, resin, vacuum residue oil, and synthetic oil. Although these materials have good bonding properties, they have many shortcomings when using them. For example, the raw sand needs to be baked during the core making process, not only The operation is complicated, the smoke is large, and the environment is seriously polluted; the price is high, which increases the cost of castings, and is difficult for users to accept, which limits the application. In order to overcome the above shortcomings, the prior art uses non-oil resin binders, which have the disadvantages of easy mold sticking, low refractory strength of sand molds, moisture regain of sand cores, and difficulty in cleaning sand for castings. SUMMARY O...

Claims

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Application Information

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IPC IPC(8): B22C1/26
Inventor 武国平武力武国和
Owner 武国和
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