Riser mold and riser preparation method with exhaust structure

Abstract

The invention discloses a riser mold and a riser preparation method with an exhaust structure. The riser mold comprises a base, a shell and a mold core, the shell is of a hollow structure and is arranged on the base, the mold core is arranged on the base, the interior of the mold core is hollow and the mold core is arranged in the shell, a space is formed between the mold core and the shell, the space is filled with non-dry sand, and at least one exhaust hole is formed in the surface of the non-dry sand towards the interior of the non-dry sand. The riser mold and the riser preparation method with the exhaust structure have the advantages of simple structure of the riser mold, beneficial exhaust, simple and convenient preparation process step and the like.

Description

technical field [0001] The invention belongs to the technical field of risers, and in particular relates to a riser mold and a method for preparing a riser with an exhaust structure. Background technique [0002] Cast steel roll riser sand is mostly made of mine clay sand mixed with an appropriate amount of clay, bentonite, and water. After being baked in a coal-fired and gas-fired industrial furnace to above 400°C for a period of time, the riser sand is completely dry and has a It can only be used at a certain temperature. This process is cumbersome to operate, takes a long time to prepare, and produces a lot of solid waste, which does not conform to the national policy of environmental protection and resource conservation. With the implementation of the national green environmental protection policy, mine sand resources are in short supply, and natural non-drying sand has begun to be used in the production process of rolls. Due to the large size of cast steel rolls and a ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to solve the existing riser production process, the riser uses a lot of sand, after the thick section non-dry sand is poured with high-temperature molten steel, under the action of high-temperature molten steel, the crystal water in the non-dry sand The reaction of solidified fat and solidified grease produces gas that precipitates into molten steel, forming diffuse inclusions, affecting the surface quality, strength and toughness of the roll neck, making it difficult to unpack the roll neck, and serious technical problems of physical sand sticking. Air vent holes are added in the dry sand to avoid the formation of dispersed air slag holes in the molten steel, thereby improving the strength, toughness and surface quality of the roll neck, improving the collapsibility of non-dry sand, and facilitating sand cleaning

Images