Wet moulding sand used for iron casting high density molding and preparation method of wet moulding sand

Abstract

The invention discloses wet moulding sand used for iron casting high density molding and a preparation method of the wet moulding sand. The wet moulding sand is made of the following raw materials of,by weight, 0.5-2 parts of bentonite, 0.2-1 parts of mixture soil (the mixture soil is composed of 70-85 parts of efficient pulverized coal, 10-25 parts of bentonite, 2-5 parts of alkaline lignite, 3-5 parts of asphalt, and 2-5 parts of alpha-starch), 0-5 parts of quartz sand new sand, 95-99 parts of quartz sand old sand, and the balance water. The wet moulding sand used for iron casting high density molding not only has high compression strength and wet-heat tensile strength, and further has excellent breathability, liquidity and surface drying; the moulding sand preparation technology is simple, the construction cost is low, and the wet moulding sand used for iron casting high density molding is suitable for large-scale popularization and application in high density molding.

Description

technical field [0001] The invention relates to green molding sand for high-density molding of iron castings and a preparation method thereof, belonging to the technical field of molding sand. Background technique [0002] At present, high-density molding such as high-pressure molding, air blasting, extrusion, injection pressure, static pressure and other molding production lines all use clay green sand as their molding sand, and the quality of green sand directly affects product quality. Therefore, controlling the quality of green sand is very important to mass production molding production lines. [0003] Sand casting is the most common casting method. Green sand is the most important molding material in the current molding process because of its low production cost and high efficiency. The quality of molding sand directly affects the surface quality of castings and casting defects such as sand holes, pores, sand inclusions, rat tails, and grooves. Most of the waste prod...

AI Technical Summary

Problems solved by technology

At present, the green sand used for high-density molding of iron castings on the market has disadvantages such as poor comprehensive performance and high price, which seriously affects the quality of castings

Images