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Molding sand for casting pressure plates

A molding sand and pressure plate technology, which is applied to casting molding equipment, molds, cores, etc., can solve problems such as weak fluidity, weak adhesion, and poor air permeability, and achieve strong fluidity, good adhesion, and air permeability strong effect

Active Publication Date: 2012-06-13
WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems of weak fluidity, poor air permeability and weak adhesion existing in the prior art, and provide a kind of fluidity strong, good air permeability, strong adhesion Molding sand for casting platen castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A molding sand used for platen casting, its composition and weight ratio are: recycled sand 90, new sand 3, pottery clay 2.5, coal powder 0.5, and the rest is water. Recycled sand is reclaimed silica sand, the content of silicon dioxide in the silica sand is equal to 71%; the composition and weight ratio of pottery clay are: kaolin 70, quartz powder 10, clay 20; coal powder contains 5% alkaline Plant ash; the compaction rate of the molding sand is equal to 40%, the wet compressive strength is 0.14MPa, the air permeability is greater than or equal to 100, and the mass percentage of water is 4.1%.

Embodiment 2

[0021] A molding sand used for platen casting, its composition and weight ratio are: recycled sand 95%, new sand 1, pottery clay 1, coal powder 0.2, and the rest is water. Recycled sand is reclaimed silica sand, the content of silicon dioxide in the silica sand is equal to 72%; the composition and weight ratio of pottery clay are: kaolin 80, quartz powder 5, clay 15; coal powder contains 5% carbon black The compaction rate of the molding sand is equal to 36%, the wet compressive strength is 0.12Mpa, the air permeability is greater than or equal to 100, and the mass percentage of water is 3.5%.

Embodiment 3

[0023] A molding sand used for platen casting, its composition and weight ratio are: recycled sand 93, new sand 2, pottery clay 2, coal powder 0.5, and the rest is water. Recycled sand is reclaimed silica sand, the content of silicon dioxide in the silica sand is equal to 80%; the composition and weight ratio of pottery clay are: kaolin 75, quartz powder 10, clay 15; coal powder contains 6% alkaline Plant ash; the compaction rate of the molding sand is equal to 40%, the wet compressive strength is 0.12MPa, the air permeability is greater than or equal to 100, and the mass percentage of water is 3.5%.

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PUM

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Abstract

The invention discloses molding sand for casting pressure plates, which comprises the following components in part by weight: 90 to 95 parts of return sand, 1 to 3 parts of new sand, 1 to 2.5 percent of argil, 0 to 0.5 percent of coal powder and the balance of water, wherein the return sand is recovered silica sand; the silicon dioxide content of the silica sand is more than or equal to 70 percent; the argil comprises the following components in part by weight: 70 to 80 parts of kaolin, 5 to 10 parts of quartz powder and10 to 20 parts of clay; the compactness of the molding sand is less than or equal to 40 percent; the green compression strength of the molding sand is 0.12 to 0.14MPa; the breathability of the molding sand is more than or equal to 100; and the water content is 3.5 to 4.1 mass percent. The molding sand has the advantages of high flowability, high breathability, high bonding strength and conservation property.

Description

technical field [0001] The invention relates to a molding sand, in particular to a molding sand used for platen casting, which is particularly suitable for high-strength and good air-permeable molds used in casting platen castings. Background technique [0002] Molding sand is a material used for molding in sand casting. Molding sand is generally mixed with molding materials such as foundry sand, sand binder and auxiliary materials in a certain proportion. Natural silica sand containing clay can also be used. The role of molding sand in the casting process is very important. The casting waste caused by the poor quality of molding sand accounts for more than 30% of the total casting waste. The usual requirements for molding sand are: good fluidity, certain plasticity, good air permeability and sand production. [0003] The Chinese patent publication number is CN101574725A, and the invention patent published on November 11, 2009 discloses a molding sand for casting aluminum a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00
Inventor 浦巧生
Owner WUJIANG HYDRAULIC COMPONENTS FOUNDRY