Abstract: The present invention relates to a process for drying coated workpieces, particularly workpieces of irregular shape, by infrared radiation and to an apparatus for carrying out this process. The present invention can be used for drying castings, particularly those having an irregular shape, thin-walled sheet-metal products as well as ceramic and glass products which have been coated with a powder or an electro-dipping varnish or water-soluble or solvent-containing varnishes. According to said process the workpieces are dried by infrared radiation in several zones at a specific temperature, an air flow being provided in the zones and the air being drawn off from one zone. According to the present invention the workpieces are preheated in the first preheating zone. In the second rest zone the infrared radiation is interrupted so that the temperature of the workpieces slightly decreases.

Abstract: A coating booth for the electrostatic application of powdery materials onto workpieces. The coating booth has a generally tubular configuration which when viewed in side elevation is generally oval but with a spiral curved bottom front wall which melds into a flat bottom surface extending toward an outlet at the bottom of the rear wall of the booth. On the rear of the booth there is a fixed fan module to which a removable filter module may be attached so as to interconnect the booth air outlet with the suction fan module. This construction facilitates quick color changes of the powdery material by maintaining a minimum deposit of powder on the interior of the booth and by enabling the filters to be interchanged without the necessity of first cleaning the filters or of interchanging individual filter media before restarting the booth with a new color.

Abstract: A coating booth for the electrostatic application of powdery materials onto workpieces. The coating booth has a generally tubular configuration which when viewed in side elevation is generally oval but with a spiral curved bottom front wall which melds into a flat bottom surface extending toward an outlet at the bottom of the rear wall of the booth. On the rear of the booth there is a fixed fan module to which a removable filter module may be attached so as to interconnect the booth air outlet with the suction fan module. This construction facilitates quick color changes of the powdery material by maintaining a minimum deposit of powder on the interior of the booth and by enabling the filters to be interchanged without the necessity of first cleaning the filters or of interchanging individual filter media before restarting the booth with a new color.