CS206365B1 - Cabin for electrostatic coating the powder materials - Google Patents

Description

Cab for electrostatic powder coating

The invention relates to an electrostatic powder coating booth in organic surface treatment technology.

For safety reasons, the walls of electrostatic coating cabins must be made of electrically conductive materials that are grounded reliably. This precaution prevents the build-up of electrostatic charges on the walls of the cabins, which, if discharged, could result in injury to the operator. On the other hand, this measure causes excessive build-up of powdered materials on the walls and bottom of the booths, which increases the risk of fire during other possible initiation and worsens the technological requirement of booth cleaning when switching to a different shade of sprayed powder material.

The prior art cab solutions limit powder deposition by creating sufficient vertical air flow in the cab, which in turn has a sagative effect on deposition efficiency.

(The pulverized powder material, which is attracted to the object to be sprayed by electrical forces, is entrained into the exhaust by increased flow). Cabins with vibrating walls and, if necessary, auxiliary blows supplied with compressed air are also known. These designs are technically and energy intensive.

These drawbacks are overcome by the electrostatic spray booth of the invention, which is characterized in that the suction chamber is separated from the spray chamber by two inverted V * inserts with a peak angle of max. 60 ° which

365 define a permanent slot in the middle of the bottom. and two adjustable slits at the rabbis side tents.

The cab according to the invention further simplifies the maintenance of the device, increases the operational safety and the efficiency of the electrostatic powder coating.

The inserts adjust the air flow to the cab to ensure that the tents are rinsed and clogged. wherein the center of the spray zone where the object to be sprayed is located has a minimum flow, allowing optimum efficiency of the coating device. The design of the current inserts creates suitable inclined surfaces min. 60 ° from the horizontal plane for powder pouring and prevent the sleeper from settling on the bottom of the cab.

Figure 1 shows a sohematical example of a cross-sectional electrostatic powder coating booth.

The electrostatic powder coating enclosure defined by the walls 1 is divided by the inserts 2, 4n ^{& the} spraying space 4 of the articles 5 with the spray guns 6 and the suction space 2. rotatably mounted.

The exhaust air creates a vacuum in the exhaust chamber 2, which is filled by the air stream from the spraying space 4 with slots Z, 3 ^and Λ2 * Meanwhile about the slots 2 and can be increased or decreased and only serves to penetrate fallen powder from the goods 2 of the suction chamber 2 ·

Claims (1)

SUBJECT OF THE INVENTION Cabinet for electrostatic powder deposition, with floor suction, characterized in that the suction chamber (7) is separated from the spray chamber (4) by two inverted V-shaped inserts (2) and (3) with an apex angle (6 6) } max. 60 ° which define a fixed slot (10) in the middle of the bottom and two adjustable slots (8) and (9) at the side walls (1) of the cab.