Abstract: In order to create a method for checking workpieces with at least one interior space, which is easy and quick to carry out, it is proposed that the method comprises the following steps:

Abstract: In an automatically operating cleaning installation for removing treating and/or machining residues from workpieces, comprising a cleaning station having associated therewith a channel for receiving at least one workpiece to be cleaned, a workpiece transportation device for introducing the workpieces to be cleaned into the channel and for removing the cleaned workpieces from the channel, and at least one blow nozzle directed into the interior of the channel and thus onto the workpieces to be cleaned for acting upon the workpieces with a stream of blow air, an air feeder, in particular, in the form of a ventilator, for supplying air to the blow nozzle at a pressure of at most approximately 0.

Abstract: Process and apparatus for cleaning workpieces by means of at least one jet of compressed air, in which the workpiece is brought into a cleaning station, a high-pressure stream of air is generated by means of a high-pressure air pump, this stream of air is supplied to a blast nozzle directed onto the workpiece and waste air fed back to the suction side of the pump via a filter, wherein to avoid any escape of waste air laden with impurities into the surroundings the workpiece is cleaned in a chamber closed so as to be at least essentially air-tight apart from an air inlet in the form of the blast nozzle as well as a waste air outlet and the air is circulated in a closed air circulation system including the chamber and wherein solid particles are mechanically filtered out of the stream of air upstream of the pump.

Abstract: A process for removing chips jammed in a cavity of a workpiece produced during machining work by means of a jet of compressed air, wherein for quick, simple and complete removal of these chips a hot jet of compressed air is used at such a temperature and directed onto the chips for such a time that their rigidity is diminished until the chips can be removed from the cavity as a result of the jet of compressed air.

Abstract: A method for processing a flush-back fluid containing impurities after its use in a flush-back filter for cleaning fluid used in a cleaning process is accomplished in accordance with the invention in that flush-back fluid drawn from the flush-back filter is subjected to a sedimentation process and hereby acted upon at least from time to time by pressure and that after completion of the sedimentation process the flush-back fluid is separated in a pressure-tight manner from a least at least a portion of a sediment recovered thereby and the latter is subsequently removed and a part of the flush-back fluid cleansed at least to a large extent of impurities is returned to the cleaning process.