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Tunnel type sand blasting machines are large scale industrial equipment designed to handle massive workpieces or high volume production of long and bulky items. These machines are commonly used in industries such as shipbuilding, bridge construction, and large scale metal fabrication, where the size and weight of the workpieces pose significant challenges for traditional sand blasting methods.
The structure of a tunnel type sand blasting machine resembles a long, enclosed tunnel, with the blasting chamber running along its length. Workpieces, such as large steel plates, ship hull sections, or bridge girders, are transported through the tunnel on a conveyor system or by specialized lifting equipment. As the workpiece moves through the tunnel, it is subjected to a powerful stream of abrasive material projected by multiple nozzles strategically positioned along the sides and top of the chamber. This setup allows for comprehensive coverage of the entire surface area of the workpiece, ensuring thorough cleaning and surface preparation.
One of the key features of tunnel type sand blasting machines is their high capacity design. They can accommodate workpieces of extremely large dimensions and weights, making them essential for industries dealing with oversized components. The blasting process can be customized based on the specific requirements of the workpiece, with adjustable parameters such as abrasive flow rate, air pressure, and nozzle configuration. For example, in a shipyard, a tunnel type sand blasting machine can be used to clean the entire hull of a large vessel before painting. The machine's powerful blasting capabilities can quickly remove rust, old paint, and other contaminants from the vast surface area. Additionally, tunnel type sand blasting machines often incorporate advanced dust collection and ventilation systems to manage the large amounts of dust generated during the operation. However, these machines require a significant investment in terms of installation space, equipment cost, and maintenance, and their operation demands skilled personnel to ensure safe and efficient functioning.