Casting sand for pump body sand mold casting

A technology of sand casting and foundry sand, which is applied in casting molding equipment, molds, cores, etc., can solve the problems of increased production cost, high price, and is not suitable for small-scale foundries, and achieves reduced gas generation and excellent refractoriness. and thermal stability, air permeability and resistance to liquid metal penetration

Inactive Publication Date: 2016-05-11
ESKE PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with silica sand, the price of these special sands is slightly hig

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] (1) Add 10 parts of sodium carboxymethyl cellulose and 8 parts of plant ash to 130 parts of water, stir to form a uniform slurry, add 15 parts of ore powder and 12 parts of asbestos powder, mix well, and mix the mixture at a microwave frequency of 2450MHz and a power of 600W Microwave treatment for 15 minutes, after the treatment liquid is naturally cooled to room temperature, material I is obtained;

[0018] (2) Heat 120 parts of silica sand, 8 parts of white carbon black and 3 parts of graphite powder to 100-110℃ for 10 minutes, then add 5 parts of magnesium stearate and 6 parts of pectin, continue to heat to 120-130℃ Mix for 10 minutes to obtain material II;

[0019] (3) Add material I, 6 parts of coconut bran and 2 parts of nano alumina to material II, mix them evenly and send them to a freeze dryer, and finally make particles with 50-100 meshes by a crusher.

[0020] SiO in silica sand 2 The content is higher than 98%.

[0021] Preparation of ore powder:...

Example Embodiment

[0023] Example 2

[0024] (1) Add 15 parts of sodium carboxymethyl cellulose and 10 parts of plant ash into 150 parts of water, stir to form a uniform slurry, add 20 parts of ore powder and 10 parts of asbestos powder, and mix well. The mixture is at a microwave frequency of 2450MHz and a power of 600W. Microwave treatment for 15 minutes, after the treatment liquid is naturally cooled to room temperature, material I is obtained;

[0025] (2) Heat 130 parts of silica sand, 10 parts of white carbon black and 5 parts of graphite powder to 100-110℃ and keep mixing for 10min, then add 7 parts of magnesium stearate and 5 parts of pectin, continue heating to 120-130℃ Mix for 10 minutes to obtain material II;

[0026] (3) Add material I, 8 parts of coconut bran and 3 parts of nano alumina to material II, mix them evenly and send them to a freeze dryer, and finally make particles of 50-100 mesh through a crusher.

[0027] SiO in silica sand 2 The content is higher than 98%.

[0028] Preparatio...

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PUM

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Abstract

The invention discloses casting sand for pump body sand mold casting, and relates to the technical field of pump casting. The casing sand is composed of, by weight, 120 parts to 130 parts of silica sand, 15 parts to 20 parts of mineral powder, 10 parts to 15 parts of sodium carboxymethylcellulose, 10 parts to 15 parts of asbestos powder, 8 parts to 12 parts of plant ash, 6 parts to 10 parts of coconut chaff, 6 parts to 10 parts of white carbon black, 5 parts to 8 parts of magnesium stearate, 4 parts to 6 parts of pectin, 3 parts to 5 parts of graphite powder, 2 parts to 3 parts of nanometer aluminum oxide and 100 parts to 150 parts of water. The casting sand has the excellent refractoriness and heat stability, and cannot have the chemical reaction with molten metal; and molding, breathability and liquid metal penetration resistance are good, and the gas-forming amount in the casting process can be reduced, so that defects of sand holes, air holes, carbon slag and the like are prevented from appearing in a pump body, and the pump body quality is improved.

Description

Technical field: [0001] The invention relates to the technical field of pump casting, in particular to casting sand for pump body sand casting. Background technique: [0002] Sand casting is a casting method for producing castings. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. The basic raw materials for making sand molds are foundry sand and sand binder. The most commonly used foundry sand is siliceous sand. When the high-temperature performance of silica sand cannot meet the requirements of use, special sand such as zircon sand, chromite sand, and corundum sand are used. However, compared with silica sand, the price of these special sands is slightly ...

Claims

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Application Information

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IPC IPC(8): B22C1/00B22C9/02B22C9/24
CPCB22C1/00B22C9/02B22C9/24
Inventor 曹珠明
Owner ESKE PUMP
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