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Shot Blasting Machine

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Shot blasting equipment is first used to remove sand and oxide scale on the surface of cast steel and iron castings in the foundry industry.

Almost all steel castings, gray castings, malleable steel parts, ductile iron parts, etc. must be shot blasted. This is not only to remove the oxide scale and sticky sand on the surface of the casting, but also an indispensable preparation process before the quality inspection of the casting. For example, the casing of a large gas turbine must be subjected to strict shot blasting before non-destructive inspection to ensure the integrity of the inspection results. reliability. In the production of general castings, shot blasting is an essential process to find surface defects of castings such as subcutaneous pores, slag holes, sand sticking, cold insulation, peeling, etc. Surface cleaning of non-ferrous metal castings, such as aluminum alloys, copper alloys, etc., in addition to removing oxide scale and finding surface defects of castings, the main purpose is to blast the burrs of die castings and obtain decorative surface quality. , to obtain a comprehensive effect. In the production of metallurgical steel, shot blasting or pickling is a combined mechanical or chemical method to remove phosphorus skin to ensure high productivity in mass production of steel. In the production of other alloy steel plates and strips such as silicon steel sheets and stainless steel sheets, annealing must be carried out during the cold rolling process before shot blasting or pickling treatment to ensure the surface roughness and thickness accuracy of cold rolled steel sheets.

The shot blasting machine is divided into drum type, chain plate type, rotary type, trolley type, squirrel cage type and hanging type shot blasting machine according to the structure of the casting carrier.

Drum type and chain plate type shot blasting machines are suitable for cleaning small and medium-sized castings that are not afraid of collision. The drum type shot blasting machine relies on the spiral guide ribs in the cylinder to make the castings turn over and run forward. The chain plate type shot blasting machine makes the casting turn and run through the movement of the chain plate. Rotary, trolley and hanging shot blasting machines are used to clean large and medium-sized castings, usually with a fixed shot blasting chamber, and the cleaned castings are rotated or moved in the shot blasting chamber. The shot blasting room is generally equipped with several shot blasting machines, which are installed in different positions to project projectiles from different directions to improve the cleaning efficiency and cleaning quality of the shot blasting machine. The hanging shot blasting machine can be equipped with several hooks on the catenary according to the needs of the cleaned castings. When cleaning, the castings are hung on the hooks and turn over by themselves while running forward. Castings are loaded and unloaded outside shot blasting and cleaned indoors.


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