A wet blasting cabinet is the propulsion of a slurry of water and abrasive (a slurry) through a sand blasting nozzle, which cleans, degreases, and removes debris on impact.
Cabinet-type wet blasting machine uses compressed air to propel a slurry onto a workpiece at high speeds. Typically, the slurry is made up of fine abrasive particles in chemically treated water. To prevent abrasive settling, it is normally maintained and agitated continuously.
As with direct-pressure dry blast systems, compressed air is supplied at the same pressure as the blast hose into the vessel housing the mixture. Pressure equalization allows the abrasive mixture to pass past the mixing tube and into the airline. A full flow valve located between the hopper and the mixing chamber controls the abrasive flow.
The water media slurry is contained within the cabinet sump, and the slurry is delivered to the manual blast nozzle via a glandless polyurethane pump that is submerged and driven externally by an electric motor. When the slurry is fed into the blast gun, it is accelerated by compressed air to create a cleaning effect.
After making contact with the components, the slurry drains back into the sump, resulting in a recirculating system. Finely broken down media and other impurities are delivered through an overflow to a sedimentation filter unit at the machine's back.
Wet Blasting Cabinet Working
OFF When the wet blasting machine is turned off, only the water heater and cabinet illumination are turned on. After about thirty seconds, the media separates from the slurry and settles at the bottom of the machine hopper. The liquid will be above, which has the advantage of being easily replaced if it becomes polluted. Only the liquid can be emptied through the upper ball valve and then refilled using the mains water hand gun; in the case of a closed loop system, the machine must be replenished from an external hosepipe. Finally, a rust inhibitor/detergent may be used after refilling if necessary.
Getting Started When the foot pedal is depressed, the machine starts up. At this stage, ensure that the operator has a firm grip on the blast nozzle; otherwise, damage to the machine may occur as a result of the blast gun shifting due to water pressure When the machine is turned on, the electric window wipers and wash work in tandem with the electrically powered pump, and a solenoid valve opens, allowing compressed air to reach the blast nozzle. It is usual for the pistol to merely propel water for the first few seconds (10-20) until the water agitation nozzle correctly combines the water and abrasive.
The majority of wet blast equipment is Wet blasting cabinet mounted, and it is frequently supplemented with auxiliary strippers, take-off conveyors, and wash-rinse dry stations. Vertical wheel, horizontal plane turntable, shuttle with rail or car extensions, chain or belt conveyors, self-contained turning mechanisms built for shafts and tubular sections, and combination tumbling-cabinet machines are the fundamental types.
For specialized operations, the industry employs a variety of wet abrasive blasting procedures. Some of these processes have generated new process names, despite the fact that they may all be classified as "wet blasting." To clear up any confusion, the following definitions for commonly used methods are supplied.
Hydro-blast process: Sand is combined with water and driven by water pressure in the hydro-blast process.
Vapor-blast process: Abrasive is suspended in a liquid and projected at high velocity by a compressed air jet.
Abrasives media in Common Use
Abrasives of various types are commonly used. The choice of a given kind is primarily determined by economic, metallurgical, and practical engineering considerations.
According to the NIOSH report, sand is by far the most often used abrasive. Steel shot, steel grit, aluminum oxide, flint/garnet, glass beads, silicon carbides, copper slag, and organic materials (such as ground walnut shells, ground corncobs, and crushed pecan shells) are also often used abrasives.
Wet Blasting Machine Features
- The full-width view window for the operator features a screen wiper and washing capability.
- The machine is controlled easily and safely by a single-foot switch.
- The method produces no dust.
- Reduce the possibility of abrasive insertion.
- As the slurry is created, fine abrasive media can be used.
- Because of the quick-release pump design, maintenance is simple.
