High-strength foundry casting sand and preparation method thereof

A casting type, high-strength technology, applied in the direction of casting molding equipment, casting molds, cores, etc., to achieve good heat resistance, high tensile strength, easy to mold and shape

Inactive Publication Date: 2015-07-29
江守仲
View PDF5 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous development of casting technology, the requirements for the wet compressive strength and tensile strength of the molding sand are getting higher and higher, but the molding sand in the existing market cannot meet the above requirements. Therefore, it is urgent to develop a high-strength casting molding sand. to meet market demand

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A high-strength foundry sand made from the following raw materials in weight (kg): Quartz sand 55, desert sand 25, illite 18, double fly powder 16, silicon boride 8, isocyanate propyltriethoxysilane 2.5 , modified bentonite 10, corundum powder 8, shale ash 6, allophane 7, sodium alginate 4, lightly burned powder 7, nano-carbon fiber 5, polyethyleneimine 5, polyvinyl butyral 2.5, water Appropriate amount;

[0014] The preparation method of described modified bentonite is as follows: adding water to beating bentonite to make a slurry with a solid content of 40%, then adding sodium tripolyphosphate equivalent to 10% of the slurry weight, 4% urea, and 8% lignin sulfonate Calcium acid, 3% citric acid, 12% calcium tetraborate, 7% aluminum hydroxide, 10% polysilicon ferric sulfate, 6% sodium tungstate, heated to 75°C, 4500rpm high-speed grinding for 18min, and then Add emulsifier OP-10 equivalent to 2.5% of the weight of the slurry, 8% of polyvinylpyrrolidone, and 5% sodium c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses high-intensity foundry casting sand and a preparation method thereof. The high-intensity foundry casting sand comprises the following raw materials in parts by weight: 45 to 65 parts of quartz sand, 20 to 30 parts of desert sand, 15 to 20 parts of illite, 12 to 18 parts of calcium carbonate powder, 5 to 10 parts of silicon boride, 2 to 3 parts of 3-isocyanatopropyltriethoxysilane, 8 to 12 parts of modified bentonite, 5 to 10 parts of emery powder, 4 to 8 parts of shale ash, 5 to 10 parts of malthacite, 3 to 5 parts of sodium alginate, 6 to 9 parts of light calcined powder, 3 to 7 parts of carbon nanofiber, 4 to 6 parts of polyethylene imine, 2 to 3 parts of polyvinyl butyral, and a proper amount of water. Compared with the traditional casting sand, the casting sand provided by the invention is relatively high in wet compression strength and tensile strength, further is excellent in heat resistance, plasticity and air permeability, is easy for pattern drawing and modeling, has the effect of bearing various external forces and high temperature, can improve casting quality obviously, and avoids defect of air holes produced by castings.

Description

technical field [0001] The invention relates to high-strength casting sand and a preparation method thereof, belonging to the technical field of molding sand. Background technique [0002] Molding sand is the material used for molding in casting. 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. The role of molding sand in foundry production is extremely important, and the casting waste caused by poor quality of molding sand accounts for about 30-50% of the total casting waste. The usual requirements for molding sand are: ① High strength and thermal stability to withstand various external forces and high temperatures; ② Good fluidity, that is, the ability of the molding sand to move between sand particles under the action of external force or its own gravity; ③Certain plasticity, that is, the ability of the molding sand to deform under the action of external force, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00
CPCB22C1/00
Inventor 江守仲
Owner 江守仲
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap