PULVERSPRUEHKABINE MIT EINER LEITVORRICHTUNG FUER ROHGAS IN EINE ABSCHEIDER-SAUGSTROEMUNG

• Main Author: VOEHRINGER, GERHARD FRIEDRICH
• Format: Patent
• Language: German
• Published: 15.01.1993
• Edition: 5
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ATOMISING APPARATUS; NOZZLES; PERFORMING OPERATIONS; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

Crude gas with coating powder is extracted from the spraying space (4) of a powder spraying booth through an outlet opening (17), at an elevated position, of the booth side wall (6). Here, the powder particles collect on the booth floor (3) mainly below the outlet opening (17). In order to prevent precipitation, a shutter (22) which is part of an extraction shaft (211) is mounted upstream of the outlet opening (17). Said shaft is swivellably mounted at its upper end in a joint (23) and can rest with its side walls against the booth side wall (6) with adjustable inclination and adjustable opening width of gaps (39). Just above the booth floor (3), it forms a suction shoe (36) which sucks up the powder directly from the booth floor through a suction gap (37). Extraction openings (331) are mounted on the walls and on the top of the extraction shaft. Crude gas can flow into the outlet opening (17) from almost all directions parallel and transversely with respect to the side wall (6). These largely laminar flows meet with reduced flow speed in the region of a slot (38) surrounding the outlet opening (17). In this way, the powder not precipitated at the workpiece is sucked into the outlet opening before it can be precipitated at the floor or a wall.