Device for deburring workpieces

In a device for deburring workpieces of rubber or plastic or the like wherein the workpieces traverse an insulated chamber on a transport arrangement and are struck by high kinetic energy blasted granulated material from a centrifugal fan blower, as well as made brittle by the addition of a low boiling liquefied gas, the improvement being said centrifugal fan blower having a vertical rotation axis and being mounted above the transport arrangement to blast the granulated material out in horizontal direction, a conical deflector collar ring having its cone angle opening facing downward being mounted about said centrifugal fan blower in a blasting plane, said transport arrangement comprising a vibratory trough mounted within said chamber, said low boiling liquefied gas being discharged through feed means mounted at said fan blower for the simultaneous cooling and blasting of the workpieces, and said gas feed means being a circular pipe mounted onto the lower edge of said deflector collar ring with spray nozzles for the liquefied gas which are aimed downward onto the workpieces.