Device for automatically cleaning masks in powder coating system

Details Device for automatically cleaning masks in powder coating system Device for automatically cleaning masks in powder coating system

1976-04-16

1977-03-01

Rimrodt, Louis K.

Coating apparatus

With cleaning or reconditioning work support or conveyer

118302, 118504, B05C 1114

Patent

active

040096815

ABSTRACT:
Apparatus for automatically cleaning excess powder off the masking system of a powder spray unit in which articles, such as glass bottles, are spray coated over their surface exclusive of the neck finish area masked off by said masking system. Two cleaning devices as module units are located beyond the exit of the spray booth in the path of the masking shields. The cleaners function continuously during operation of the masks by engaging the shields in their travel by a pair of contoured rotary brushes, and plural stationary brushes. The brushes sweep the excess powder off the shaped masks in an enclosure kept under negative pressure. Air flow from the enclosure entrains dislodged powder and carries it to a collection system or to the powder supply for recycling and use in the spray system. A blow air assist may be employed to scrub powder loosened by the brushes from the workpiece being cleaned. Cleaning the masks repeatedly and automatically assures against powder residue contacting the bottle finish and prevents powder build-up which may be dislodged and form on the bottle coating as globs or cakes. Such globs when fused form a defect in the plastic coating on the bottle.

REFERENCES:
patent: 2974631 (1961-03-01), Thompson
patent: 3641618 (1972-02-01), Rainey et al.
patent: 3830196 (1974-08-01), Guttman et al.
patent: 3886899 (1975-06-01), Johnson
patent: 3909289 (1975-09-01), Foucart

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