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Formula of resin sand mold suitable for cutting

A technology of cutting processing and resin sand, which is applied in metal processing equipment, casting molds, cores, etc., can solve the problems of poor cutting performance and achieve the effects of good cutting performance, less sand splashing, and high mold dimensional accuracy

Inactive Publication Date: 2014-12-10
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the shortage of poor cutting performance of sand blanks with traditional resin sand formulations in cutting processing, and provides a molding sand formulation suitable for cutting processing and meeting casting performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: The present invention is used to produce sand molds with higher molding sand strength and suitable for cutting. Specific steps are as follows:

[0019] 1) Take the original sand as silica sand, the main component is silicon dioxide, the content is 96%, the angle coefficient is ≤1.25, and the particle size of the molding sand is 50-100 mesh;

[0020] 2) Take alkaline phenolic resin (viscosity ≤ 240mpa.s at room temperature, density 1.2 ~ 1.3g / cm 3 ) as a binder, the amount of resin added is 2% of the weight of the original sand;

[0021] 3) Take the curing agent (the main component is glycerol acetate, the viscosity at room temperature is ≤40mpa.s, the density is 1.1~1.25g / cm 3 ), the weight ratio of the first component of the curing agent to the second component is 1:1, the first component and the second component are different types of organic esters (different curing speeds), and the amount of curing agent added is the weight of the original sand 0.4%...

Embodiment 2

[0025] Embodiment 2: Utilize the present invention to make the three-sieve formula sand mold that is suitable for cutting. Specific steps are as follows:

[0026] 1) The raw sand is selected as silica sand, the main component is silica, the content is 96%, the angle coefficient is ≤1.30, and the particle size of the molding sand is 50 mesh, 70 mesh or 100 mesh. Among them, the component contents of the sand with three particle sizes are as follows: 50 mesh accounts for 20% of the original sand weight, 70 mesh accounts for 35% of the original sand weight, and 100 mesh accounts for 45% of the original sand weight;

[0027] 2) Take alkaline phenolic resin (viscosity ≤ 240mpa.s at room temperature, density 1.2 ~ 1.3g / cm 3 ) as a binder, the amount of resin added is 2.5% of the weight of the original sand;

[0028] 3) Take the curing agent (the main component is glycerol acetate, the viscosity at room temperature is ≤240mpa.s, the density is 1.1~1.25g / cm 3 ), the weight ratio of...

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Abstract

The invention relates to a formula of a resin sand mold suitable to cutting. The formula of the resin sand mold is characterized in that the weight of added resin accounts for 0.9%-2.8% that of crude sand, the weight of a curing agent accounts for 0.3%-1.4% that of crude sand, and the weight of an additive accounts for 0.03%-0.07% that of crude sand, wherein the resin refers to a single component, the curing agent is formed by evenly mixing a first component and a second component, and the crude sand is formed by mixing once-sieved sand and repeatedly-sieved sand. The resin sand prepared by the method is high molding sand strength, only a small quantity of sand splashes in a cutting process, a cutting tool is worn slightly, no sand mold cracking phenomenon occurs, and a processed casting mold has high size precision and good cutting performance.

Description

technical field [0001] The invention relates to a resin sand mold formula suitable for cutting and belongs to the field of casting. Background technique [0002] Molding materials play an important role in casting production, and their quality directly affects the quality, production efficiency and cost of castings. According to statistics, in casting production, castings are often scrapped due to poor quality or improper use of molding materials, accounting for more than 50% of the total scrap rate. The cost of molding and core making accounts for about 1 / 2 of the total cost of casting production, metal smelting accounts for 1 / 4 of the cost, and the remaining 1 / 4 of the cost is spent on casting cleaning and post-processing, of which 70% of the cost of cleaning and Modeling materials are closely related. It can be seen that about 70% of the total cost of casting production and more than half of the quality problems are related to molding materials and their applications. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/22B22C1/02
Inventor 单忠德刘丽敏董晓丽刘丰
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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