Pouring method for liner plate

Abstract

The invention discloses a pouring method for a liner plate, and belongs to the technical field of part casting. A liner plate material is made of high manganese steel, the weight is 10-30 kg, the wall thickness is 20-50 mm, and the pouring temperature is 1420-1450 DEG C; and molding sand is formed by mixing of washing silica sand, bentonite and water, immediate spraying is conducted after molding is conducted, the coating thickness is 0.5 mm, the liner plate is ignited and dried immediately after sprayed, surface-assisted drying is conducted with oxygen-acetylene flame, and mould assembling and pouring are conducted after the liner plate is placed for about an hour. According to the pouring method for the liner plate, the produced liner plate mould wall is low in water on the surface layer and high in strength, and sand sticking, pores, sand inclusion and other defects are basically avoided, the surface roughness Ra is less than or equal to 12.5 [mu]m, production cost is low, production cycle is short, environment pollution is small, added quantity of the bentonite and the water is few, and the air permeability of the molding sand is good.

Description

technical field [0001] The invention relates to the technical field of parts casting, in particular to a liner casting method. Background technique [0002] Lining plate is a ubiquitous structure in various mechanical parts. Casting is the most commonly used one in the production method of lining plate. Clay green sand casting process occupies an important position in molding core making process because of its low cost and high efficiency. . Coal powder is generally added to ordinary cast iron green sand to improve the surface quality of castings, but it reduces the air permeability and strength of the sand, and more seriously, it deteriorates the working conditions. When the ordinary green sand process is used to directly produce steel castings, the castings are prone to defects such as sand sticking and pores. In order to improve the working conditions of the green sand process, realize "green casting" and improve the surface quality of castings, the application of green...

AI Technical Summary

Problems solved by technology

Coal powder is generally added to ordinary cast iron green sand to improve the surface quality of castings, but it reduces the air permeability and strength of the sand, and more seriously worsens the working conditions.

When the ordinary green sand process is used to directly produce steel castings, the castings are prone to defects such as sand sticking and pores