Nano diatomite containing modified furan resin sand for steel casting and preparation method for nano diatomite containing modified furan resin sand

Abstract

The invention discloses nano diatomite containing modified furan resin sand for a steel casting. Aquadag powder, microcrystal ceramic powder and quartz sand of different grain diameters and different ratios are selected as molding sand materials of the resin sand, and after high-temperature pouring, good gas permeability is achieved, the appearance is flat and smooth, and the style is stable. Due to the addition of nano tourmaline powder, the gas permeability of the molding sand is further increased. Compared with traditional furan resin, a prepared nano diatomite containing modified furan resin adhesive has the beneficial effects of being small in gas forming amount, few in organic matter residue, low in viscosity, high in bonding force, high in strength and the like, the utilization rate is higher, and the use amount is smaller. The prepared molding sand is good in mobility and easy to remove, and the quality of the obtained steel casting is effectively improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing molding sand for steel casting, in particular to a modified furan resin sand containing nano diatomite for steel castings and a preparation method thereof. Background technique [0002] In the casting process of steel parts, the quality of the molding sand is directly related to the quality of the casting. The molding sand is mainly made of sand, adhesives and auxiliary materials mixed according to different proportions. The adhesive is a type of It is an important molding material, and its comprehensive quality is directly related to the surface quality and internal quality of castings. At present, the most widely used adhesives are mainly inorganic adhesives represented by clay sand and water glass sand and furan resin. Representative resin adhesive. [0003] Furan resin sand has the advantages of good casting quality and low rejection rate. However, it still has many defects. In actual p...

AI Technical Summary

Problems solved by technology

[0003] Furan resin sand has the advantages of good casting quality and low rejection rate. However, it still has many defects. In actual production, it is necessary to improve its performance from the aspects of its synthetic raw materials and preparation technology.

Furan resin sand mainly has the following problems: high gas generation, resulting in high porosity of castings, high usage rate leads to hot cracking of castings, poor fluidity, poor storage, high formaldehyde residue, etc.