Separating spent abrasive from good, in such a way that ensures it is not taken to the dust collector, protects the collector cartridges or bags from premature wear. The operator can adjust the power of the vacuum to determine the minimum size of particle he wishes to remain in the system. The higher the vacuum, the larger the particle removed.
Clean abrasive is now all that remains and this is deposited into a silo above blast machine or machines. This silo can be designed to take varying amounts of abrasive. We will usually specify silo size to allow the largest item to be processed completely before abrasive needs to be recovered. This is done to ensure that abrasive clean-up is not undertaken while product is in the booth. Once all the abrasive in the blast machine has been delivered, or at any other time the operator releases the dead man’s handle, the blast machine is automatically charged with fresh abrasive from the silo above.
To assist in media recovery, Airblast can make sections of the blast booth floor capable of recovering media. These partial recovery floors incorporate one or several auger screw conveyers. Typically, these partial screw recovery booths have a cross screw feeding the elevator, and in some cases a series of longitudinal screws feeding the cross screw laid out in an “H” configuration. To prevent overloading, we also incorporate an adjustable baffle media metering plate covering the screw.