High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof

A technology of water glass sand and compound modification, which is applied to casting molding equipment, casting molds, manufacturing tools, etc. It can solve the problems of difficulty in improving the quality of pump and valve castings, difficulty in regenerating old sand, and low strength at room temperature, and achieve excellent room temperature. Wet strength, less water glass consumption, and excellent overall performance

Inactive Publication Date: 2016-03-23
合肥李诺新材料贸易有限公司
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AI Technical Summary

Problems solved by technology

[0003] Castings of pumps and valves have the characteristics of thin walls and complex shapes. In the casting process, the quality requirements for molding sand are particularly strict. The quality of molding sand is also an important factor related to the quality of castings. Although water glass molding sand has significant advantages, there are also many Disadvantages, obvious defects are mainly manifested in low strength at room temperature, poor collapsibility, and difficulty in regenerating old sand. If it is not modified, it is difficult to improve the quality of pump valve castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The water glass sand in this example is prepared from the following raw materials in parts by weight: 30 50 mesh kaolin clinker, 30 80 mesh fused corundum sand, 10 beryllium oxide, 1 hydroxyapatite, 1 graphite powder, and modified water glass bonding Agent 1.5, bentonite 2, choline chloride 0.1, nano calcium fluoride 0.4, 50% ethanol aqueous solution 8, silane coupling agent 0.1.

[0013] The modified water glass adhesive is made of the following raw materials in parts by weight: water glass 12 of 40 Baume degree, magnesium aluminum silicate 0.1, bacterial cellulose 2, quaternary ammonium salt ionic liquid 6; its modification preparation method is as follows: First put the bacterial cellulose into the quaternary ammonium salt ionic liquid, heat to 40°C, stir and mix for 2 hours, then add other remaining materials, and continue to stir and mix for 40 minutes to obtain the product.

[0014] The preparation method of this modified water glass sand is:

[0015] (1) First a...

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Abstract

The invention discloses high-thermal-conductivity composite modified sodium silicate sand for pump valve castings. A modified sodium silicate binder in the sodium silicate sand is higher in constant-temperature wet strength, thixotropy and rheological property compared with a conventional modified sodium silicate binder, high in reaction binding activity, and green and environment-friendly, and the dosage of sodium silicate is lower; in addition, beryllium oxide in raw materials is capable of effectively improving the thermal conductivity of moulding sand, and preventing sand inclusion of the castings, and bentonite-supported nano-calcium fluoride has lubrication and reinforcement effects in case of being dispersed in sand materials, and capable of forming a non-stick impermeable layer, preventing sand sticking of the castings, and improving the surface quality of the castings; and the composite modified sodium silicate sand is excellent in comprehensive performance, uniform in strength, high in casting quality, and capable of meeting the pouring requirements of the high-accuracy pump valve castings.

Description

technical field [0001] The invention relates to the technical field of water glass sand, in particular to a high thermal conductivity composite modified water glass sand for pump and valve castings and a preparation method thereof. Background technique [0002] Molding sand is mainly a kind of material used for molding in casting, which is made by mixing sand materials, adhesives and auxiliary substances according to different proportions. According to the different adhesives used, it can be divided into clay sand and water glass sand. , resin sand, etc. Among them, water glass sand has the advantages of high strength, low cost, simple process, and low pollution, and is widely used. [0003] Castings of pumps and valves have the characteristics of thin walls and complex shapes. In the casting process, the quality requirements for molding sand are particularly strict. The quality of molding sand is also an important factor related to the quality of castings. Although water gl...

Claims

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Application Information

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IPC IPC(8): B22C1/00B22C1/18B22C1/02
CPCB22C1/00B22C1/02B22C1/188
Inventor 李诺
Owner 合肥李诺新材料贸易有限公司
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