ABRASIVE-BLASTING MACHINE FOR TRAVELLING WORKPIECES COMPRISING AN ENTRANCE AND AN EXIT CHAMBER

摘要

1. Centrifugal blasting machine for workpieces passing through it, having a blasting chamber (1) in the form of a drum or throughed belt (2), having one respective drumlike, rotating entrance chamber (7) with a spiral-shaped conveyor device, and having an exit chamber (8), wherein at least the entrance chamber (7) has a peripherally-closed, spiral-shaped channel (15), extending from an inlet aperture (16) to a coaxial outlet aperture (17), and at least one tubular piece (14), characterised in that at least the tubular piece (14) is provided with two apertures (18, 19) arranged on the periphery and displaced axially relative to one another, in that the spiral-shaped channel (15) on the external diameter of the tubular piece (14) leads from the first aperture (18) to the second aperture (19), and in that a wall (20), closing the inner tube cross-section, is arranged in the inner diameter of the tubular piece (14) between the two apertures (18, 19).