Suction blasting cabinets use a venturi-type sand blasting nozzle to create a suction that sucks air and media from the storage chamber up into the gun, where the air stream propels it towards the workpiece. The nut indicates the size of the air jet. This is the orifice size in 1/32 inch increments. The corresponding nozzle size denotes the nozzle bore size in sixteenths of an inch ( sand blast nozzle assembly will have a 5/32" air jet and a 5/16" nozzle). If these two elements do not match or are not properly calibrated, the gun will not produce the appropriate suction.
The way the medium is combined with the pressurized air stream distinguishes a pressure cabinet from a suction cabinet. An air jet sucks the media up to the gun and mixes it in just before it leaves through the nozzle in the suction cabinets. The pressure blasting cabinet mix the media in a pressurized grit valve, and the pressurized mixture passes through the hose to the nozzle. This significantly increases the rate at which the media departs the nozzle, resulting in increased output.
The blasting pressure, like that of suction cabinets, is regulated via the pressure regulator at the front of the cabinet. When contrasted to a suction cabinet, a pressure cabinet can often blast at lower pressures. In a suction cabinet, glass beads abrasive at 80 psi is equivalent to 50 or 60 psi in a pressure cabinet.
The suction sand blaster cabinet is designed to work with the majority of light and reclaimable abrasive media on the market. Sand, crushed glass, and silica, on the other hand, are not suggested and should not be utilized in your blast cabinet. These abrasives produce very fine dust, which can clog the pores of the bag, clog the ventilation system, and create dust accumulation inside the cabinet while in operation. Use reclaimable abrasives like glass beads or aluminum oxide instead.
To fill, turn on the ventilation system, open the cabinet door, and slowly pour a maximum of 25 lbs (approximately 1/2 bag) of abrasive at the bottom of the cabinet. The abrasive will be sucked and directed to the sand blasting hopper for storage.
Turn on the motor and open the air inlet. Blasting pressure should not exceed 80 to 90 pounds when working. Place the cleaned section inside the cabinet. It must be clean and dry, with no oil or grease. Put on protective gloves after closing the door. Hold the rifle in one hand and the component in the other.
After cleaning, wait for 10 to 15 seconds before turning off the motor and opening the cabinet door to allow the dust in the suspension to be evacuated. turn off the electric motor Turn off the compressor's air supply.
The blast media pushes at a lower pressure and speed in a suction blast cabinet. Direct pressure cabinets blast residue and coatings from items three to four times faster than classic siphon blast cabinets. Heavy residue or coatings are more difficult to remove from a surface.
A siphon blaster works by sucking blast media through a hose and delivering it to a blast nozzle, where it is propelled at high speed into the cabinet. Siphon blasting equipment is less difficult to set up, but it requires higher blasting pressure to obtain the maximum abrasive effect.