Knar clay moulding sand prevented from adhering to casting and preparation method of knar clay moulding sand

Abstract

The invention discloses knar clay moulding sand prevented from adhering to a casting and a preparation method of the knar clay moulding sand. The knar clay moulding sand is prepared from, by weight, 24-38 parts of silica sand, 16-29 parts of high titanium slag, 14-22 parts of andalusite, 20-30 parts of basalt, 18-32 parts of kyanite, 10-15 parts of ceramic polishing slag, 9-16 parts of asbestos tailings, 45-55 parts of knar clay, 22-34 parts of salt gypsum, 12-18 parts of waste mortar, 10-15 parts of bone meal, 5-10 parts of aluminum dihydrogen phosphate and 300-400 parts of a modifying agent. The moulding sand prepared from the raw materials such as the knar clay, the silica sand, the ceramic polishing slag, the slat gypsum and the waste mortar according to a certain ratio has remarkable brittleness at the room temperature, and the sand is prevented from adhering to the surface of the casting, so that the casting with the high surface quality is obtained. Meanwhile, the moulding sand has high strength and thermal stability, can bear the action of various kinds of external force and high temperature and is suitable for production like steel casting, iron casting and casting of nonferrous alloy castings.

Description

technical field [0001] The invention relates to a wooden knot clay molding sand for preventing castings from sticking to sand and a preparation method thereof, belonging to the technical field of molding sand. Background technique [0002] Sand casting is the most common casting method, and molding sand is the most important molding material in the current molding process. 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. Castings produced with sand molds account for more than 80% of the total casting production. The quality of molding sand directly affects the appearance quality of castings and casting defects such as sand holes, pores, and sand inclusions. With the continuous development of casting technology, the performance requirements of molding sand are getting higher and higher. The molding sand currently on the market is easy to cause sand sticking on the su...

AI Technical Summary

Problems solved by technology

With the continuous development of casting technology, the performance requirements of molding sand are getting higher and higher. The molding sand currently on the market is easy to cause sand sticking on the surface of castings, which seriously affects the surface quality of castings.