Behr Industrieanlagen Gmbh & Co.

Hermann Behr & Sohn Gmbh & Co.

Hans Behr

Kurt Vetter

Rolf Schneider

Fred Luderer

Werner Hohnhaus

A roof machine for the electrostatic paint coating of the front end, roof, and rear surfaces of an automobile chassis, transported on a conveyor belt includes a roof beam equipped with atomizers, the roof beam extending over the conveyor belt. Opposite ends of the roof beam are positioned in two vertical columns, one column containing the drive elements for the roof beam and the atomizers, and the other column containing the paint supply for the atomizers. The roof beam is positioned in the vertical columns that the roof beam can be moved up and down and can be rotated around its longitudinal axis as well, and the atomizers can be moved jointly back and forth and tilted and individually adjusted with respect to their lateral spacing relative to one another. The housing jacket of the roof beam is cylindrical.

Roof machine for paint finishing

Particles of conductive coating material, such as the water-enamel type paint, are sprayed from a grounded bell-atomizer (2) and are electrostatically charged in the corona-discharge area by outer electrodes (10) which are inserted into a holding-arrangement (11, 12, 15) made of an insulating material. Potential-control means in the form of suitably selected materials for the holding-arrangement (11, 12, 15) and/or an atomizer-housing (4) are provided. The radial-potential pattern between the atomizer-housing (4, 6) and the outer electrodes (10) is approximated to the radial-potential distribution of the material sprayed. The insulating material of at least a portion of the apparatus consists of a fluorocarbon such as PTFE (polytetrafluorethylene). The subject invention reduces the danger of the apparatus coating itself.

Apparatus for coating workpieces electrostatically

Particles of conductive coating material, such as the water-enamel type paint, are sprayed from a grounded bell-atomizer (2) and are electrostatically charged in the corona-discharge area by outer electrodes (10) which are inserted into a holding-arrangement (11, 12, 15) made of an insulating material. Potential-controls in the form of suitably selected materials for the holding-arrangement (11, 12, 15) and/or an atomizer-housing (4) are provided. The radial-potential pattern between the atomizer-housing (4, 6) and the outer electrodes (10) is approximated to the radial-potential distribution of the material sprayed. The insulating material of at least a portion of the apparatus consists of a fluorocarbon such as PTFE (polytetrafluorethylene). The subject invention reduces the danger of the apparatus coating itself.

In an apparatus for electrostatically coating workpieces with an electrically conductive coating material, an intermediate isolation tank (V) is conencted by electrically insulating conduit lines (LVA, LVB, LZA, LZB) between an electrically grounded coating material supply and a high voltage spraying device atomizer (Z). When the apparatus is in operation, the conduit lines (LVA, LVB, LZA, LZB) are alternately filled and emptied, such that the grounded supply and the high voltage atomizer (Z) are continuously insulated from each other. One embodiment utilizes an isolation tank V' which includes a metering cylinder (DZ) having a displaceable piston (2) for adjusting the coating material capacity of the tank (V') to the amount required to coat a single workpiece.

Method and apparatus for electrostatic coating with conductive material

In an apparatus for the use of so-called water enamels or some other similarly conductive coating material, the electrical field for charging the sprayed particles is produced between the grounded spraying edge (6) of a bell-shaped atomizer (10) and a large number of external electrodes (10) inserted into an annular element (20) made of an insulating material.

Apparatus for electrostatic coating of objects

An electrostatic spray coating assembly (10) for atomizing electrically conductive material comprises a rotary atomizer spray head (12) having an annular atomizing spraying edge (14). An external housing (22) supports the spray head (12) and a feed line (18) supplies the material from a supply system to the spraying edge (14) of the spray head (12). The feed line (18) and the material supplied thereby and the spray head (12) are electrically grounded. Three needle-shaped charging electrodes (36) are in spaced relationship circumferentially at uniform angular intervals with respect to the spray head (12). The charging electrodes (36) are connected to a source of high voltage potential for producing an electrical field charging the conductive material. The charging electrodes (36) are positioned from the spraying edge (14) of the spray head (12) a predetermined radial distance (R) at least twice the diameter (d) of the spraying edge (14) of the spray head (12).

The invention relates to a nozzle for a paint spraying device having a radially inward valve needle that is connected in a coaxial arrangement with the nozzle. A radially outward paint supply pipe is connected to the valve at one end and a paint source at the other. The valve needle is hollow for paint supply purposes and has a forwardly inclined bore in its tip which opens axially in front of the valve into an annular chamber created between the valve needle and the supply pipe.

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Stuttgart, Germany

Hans Behr