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Modified organic ester for environment-friendly casting and preparation method

A technology of modification of organic esters, applied in casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of high price of organic esters, emphasis on environmental protection, and irritating odor, and achieve good hardness, low price, The effect of high sand mold strength

Inactive Publication Date: 2019-01-01
内蒙古第一机械集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are also some problems: 1. Most of the organic ester raw materials are chemical products, which react with water glass under high temperature drying conditions to produce pungent odor
2. Since the production of organic esters is restricted by technical barriers in the industry, the price of organic esters is too high, resulting in high raw material costs
These problems do not meet the requirements of low cost, high efficiency and environmental protection required by the market

Method used

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  • Modified organic ester for environment-friendly casting and preparation method
  • Modified organic ester for environment-friendly casting and preparation method
  • Modified organic ester for environment-friendly casting and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Spring and Autumn Test: At the production site, the sand temperature is 16°C, and the sand temperature is 15°C. Take 2000g of the mixed sand sample and make it into a cylindrical standard sample.

[0032] Raw sand + 3% modified water glass + 20% organic ester Z01 glyceryl monoacetate Z02 glyceryl diacetate Z03 glyceryl triacetate Z04 citric acid ester

[0033] New sand (Inner Mongolia Daqi quartz sand)

[0034]

[0035] Note: All organic esters are added with 20% PPC and 5% with citric acid ester.

[0036] Mixed sand (20% new sand + 80% regenerated sand) residual Na in regenerated sand 2 O 0.53%

[0037]

[0038] Note: All organic esters are added with 20% PPC and 5% with citric acid ester.

Embodiment 2

[0039] Example 2 Summer test: At the production site, the sand temperature is 30°C, and the sand temperature is 35°C. Take 2000g of the mixed sand sample and make it into a cylindrical standard sample.

[0040] Raw sand + 3% modified water glass + 20% organic ester Z01 glyceryl monoacetate Z02 glyceryl diacetate Z03 glyceryl triacetate Z04 citric acid ester

[0041] New sand (Inner Mongolia Daqi quartz sand)

[0042]

[0043] Note: All organic esters are added with 20% PPC and 5% with citric acid ester.

[0044] Mixed sand (20% new sand + 80% regenerated sand) regenerated sand residual Na2O 0.53%

[0045]

[0046] Note: All organic esters are added with 20% PPC and 5% with citric acid ester.

Embodiment 3

[0047] Example 3 Winter test: At the production site, the sand temperature is 8°C and the sand temperature is 16°C, take 2000g of the mixed sand sample, and make it into a cylindrical standard sample.

[0048] Raw sand + 3% modified water glass + 20% organic ester Z01 glyceryl monoacetate Z02 glyceryl diacetate Z03 glyceryl triacetate Z04 citric acid ester

[0049] New sand (Inner Mongolia Daqi quartz sand)

[0050]

[0051]

[0052] Note: All organic esters are added with 20% PPC and 5% with citric acid ester.

[0053] Mixed sand (20% new sand + 80% regenerated sand) regenerated sand residual Na2O 0.53%

[0054]

[0055] Note: All organic esters are added with 20% PPC and 5% with citric acid ester.

[0056] Compared with ordinary organic esters, the modified organic esters for environmentally friendly foundry of the present invention have the advantages of strong environmental adaptability, good fluidity of molding sand, good hardness and permeability of sand molds...

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Abstract

The invention discloses modified organic ester for Environment-friendly casting. The modified organic ester comprises one of or a mixture of more of acetin, propylene carbonate and citrate. When the modified organic ester is used in water glass self-hardening sand, the organic ester and a binder account for 0.35 to 0.6 percent and 2.0 to 3.2 percent of the mass of the original sand. Compared withthe ordinary organic ester, the environment-friendly modified organic ester has the advantages of high environmental adaptability, good mold sand mobility, good sand hard permeability and high strength of the sand mold after being hardened, the basic raw material is environment-friendly and can reach the food grade, the price of the finished product organic ester is only half of the ordinary organic ester, and the environment-friendly modified organic ester is suitable for producing large, medium and small-sized casting, and can satisfy the molding production of one box with multiple components and one box with multiple varieties. The invention belongs to the field of a novel product of organic ester and application thereof in casting molding sand.

Description

technical field [0001] The invention belongs to the invention of new organic ester products and its application in the field of foundry sand, and relates to a modified organic ester for environmentally friendly casting and a preparation method. Background technique [0002] my country is a big country in the equipment manufacturing industry, and casting is the basic industry of equipment manufacturing. Since entering the 21st century, the concept of green manufacturing and sustainable development has been recognized and more and more valued. It is known as the water glass of green binder. Sand ushered in another big development opportunity, and the water glass sand hardened by ester has become the first choice. After years of continuous improvement, water glass as a binder has achieved quality in modification research, environmental protection raw materials and green manufacturing. leap. The matching water glass hardening agent has high sand mold strength and good collapsibil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18B22C1/10
Inventor 左文博张挨元单水维杜志强王虎明李卫国李志杰
Owner 内蒙古第一机械集团股份有限公司
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