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A shot blasting machine, also known as a sandblasting machine or grit blasting machine, is a casting equipment that uses a turbine to throw high-speed shots to clean or strengthen the surface of castings. Its grinding methods include centrifugal grinding, water vortex grinding, and rotary grinding. It was initially used in the casting industry to remove surface sand and scale from cast steel and cast iron. The shot blasting machine uses a turbine to throw steel shots and steel grits at high speed to impact the surface of material objects, making it a faster and more effective surface treatment technology compared to others. QGMA is a specialized manufacturer of shot blasting machines, continuously striving to develop products and committed to providing customers with a variety of shot blasting machine products and services.
Surface cleaning
Shot blasting equipment was initially used in the casting industry to remove surface sand and scale from cast steel and cast iron. Almost all cast steel, gray iron, malleable iron, and ductile iron castings undergo shot blasting treatment. This is not only to remove surface scale and sand but also an indispensable process before quality inspection of castings. For example, large turbine casings must undergo strict shot blasting before nondestructive testing to ensure the reliability of the test results. In general casting production, shot blasting is an essential process for detecting surface defects such as subcutaneous pores, slag holes, sand sticking, cold laps, and skinning.
Non-ferrous metal castings
For example, the surface cleaning of aluminum alloy and copper alloy castings is not only to remove scale and detect surface defects but also mainly to remove burrs from die castings using shot blasting and to obtain a decorative surface quality, achieving a comprehensive effect. In metallurgical steel production, shot blasting or pickling is a mechanical or chemical combined method used to remove scale to ensure high production efficiency. During the production of silicon steel sheets, stainless steel thin plates, and other alloy steel plates and strips, an annealing followed by shot blasting or pickling process is necessary during the cold rolling process to ensure surface roughness and thickness accuracy of cold-rolled steel sheets.
Workpiece strengthening
Increasing the dislocation density in metals is a primary method to improve metal strength. Shot blasting is a proven method to increase the dislocation structure of metals. For some metals that cannot be hardened through phase transformation (like martensitic quenching) or need further strengthening after phase transformation hardening, this method is particularly significant. Aviations, aerospace industries, automotive, and tractor components require lightweight yet reliable parts, and an essential process to achieve this is to use shot blasting to improve the strength and fatigue strength of components.
Foundry industry
General castings produced by foundry enterprises need grinding and polishing, and shot blasting machines are specialized equipment used for this purpose. They use different models for different workpieces without damaging the original shape and performance of the castings.
Mold industry
Generally, molds are mostly cast, and the molds themselves require smoothness. Shot blasting machines can polish as required without damaging the original shape and performance of the molds.
Steel mills
Steel materials and steel plates produced by steel mills have many burrs just out of the furnace, affecting their quality and aesthetics. Using a pass-through shot blasting machine can solve these problems easily.
Shipyards
The steel plates used in shipyards have rust, affecting the quality of shipbuilding. Manually removing rust is not feasible due to the large workload, hence requiring a machine to remove rust to ensure shipbuilding quality. Using a series of pass-through shot blasting machines can solve this problem.
