High-strength and high-temperature-resistance molding sand and preparation method thereof

A high-temperature-resistant, high-strength technology, applied to casting molding equipment, casting molds, cores, etc., can solve problems such as low strength, affecting casting quality, and poor high-temperature resistance, so as to achieve low scrap rate and ensure comprehensive performance and quality Stability, effect of increasing heat resistance

Inactive Publication Date: 2016-04-13
安徽创奇乐智能游乐设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous development of casting technology, the requirements for the performance of molding sand are getting higher and higher. The molding sand currently on the market has the disadvantages of low strength and poor high temperature resistance, which affects the quality of castings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A kind of high-strength high-temperature resistant molding sand, made of the following weight (kg) raw materials: alluvial 18, attapulgite 32, obsidian 16, obsidian 12, waste brick chips 10, refined slag 8, corundum Sand 20, sea green stone 12, calcium formate 9, nano-magnesium titanate 8, polyethyleneimine 5, modifier 310;

[0014] The preparation method of the modifier is as follows: a. Take the following weight (kg) of raw materials: polyvinylpyrrolidone 15, polyvinyl alcohol 10, sodium tripolyphosphate 5, corn starch 16, guar gum 13, acrylic acid 33, acrylic acid Amide 27, soybean oil 6, Span 801, ammonium persulfate 0.1, sodium bisulfite 0.06; b. Take corn starch and guar gum and mix well, add water equivalent to twice the amount of the mixture, and heat it to 80°C in a water bath. Stir for 25 minutes, cool to 50°C, add soybean oil and Span 80, stir for 10 minutes, and set aside; c. Mix polyvinylpyrrolidone, polyvinyl alcohol, and sodium tripolyphosphate evenly, and a...

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PUM

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Abstract

The invention discloses high-strength and high-temperature-resistance molding sand and a preparation method thereof. The high-strength and high-temperature-resistance molding sand is prepared by the following raw materials in parts by weight: 14-22 of allophane, 24-38 of attapulgite, 12-18 of obsidian, 10-15 of baddeleyite, 8-14 of waste brick chips, 5-10 of refining slag, 16-24 of emery, 9-16 of glauconite, 7-11 of calcium formate, 5-10 of nanometer magnesium titanate, 4-7 of polyethylenimine, and 270-330 of modifying agents. The molding sand, prepared with allophane, obsidian, baddeleyite, waste brick chips, refining slag, emery and the like as main raw materials, is better in thermal stability and higher in refractoriness, and is added with calcium formate, nanometer magnesium titanate, polyethylenimine and the like to improve the green compression strength and the wet tensile strength. The prepared molding sand is excellent in breathability, fluidity, strength, collapsibility and high-temperature resistance; and a casting produced by the molding sand is smooth in surface and low in rejection rate.

Description

Technical field [0001] The invention relates to a high-strength, high-temperature resistant molding sand and a preparation method thereof, and belongs to the technical field of molding sand. Background technique [0002] Sand casting is the most common casting method, and molding sand is the most important molding material in the current molding process. Molding sand is generally made by mixing molding materials such as raw sand for casting, molding sand binder, and auxiliary additives in a certain proportion. Castings produced with sand molds account for more than 80% of the total production of castings. The quality of molding sand directly affects the appearance quality of castings and casting defects such as sand holes, pores, and sand inclusions. With the continuous development of casting technology, the performance requirements of molding sand are getting higher and higher. Currently, molding sands on the market have the disadvantages of low strength and poor high temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C1/02
CPCB22C1/00B22C1/02
Inventor 张庆
Owner 安徽创奇乐智能游乐设备有限公司
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