SU1255219A1 - Chamber for pneumatic electrostatic application of pulverulent materials - Google Patents

Description

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The invention relates to equipment for applying polymeric powder coatings in an electrostatic field.

The aim of the invention is to improve working conditions and reduce the fire and explosion hazard of the chamber by eliminating the exit of powder through the transport opening.

FIG. 1 shows a chamber for pneumo-electrostatic powder coating; in fig. 2 - part of the camera in the area of the transport opening.

The chamber contains walls 1 with an opening 2 for a sprayer and a transport opening 3. At the bottom of the chamber, a grid 4 is installed and a bunker 5 is mounted, connected to a recovery system (not shown). The upper part of the transport opening is formed by curved walls.

The parts 6 of the bent walls facing the inside of the chamber are wedge-shaped, and the parts 7 of the bent walls on the outside of the chamber are concave. On the outside of the camera, air nozzles are installed, made in

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de tubes 8 with holes 9, the axes of which are directed towards the n) eoema. The tubes are connected by fittings 10 with a compressed air supply system.

The camera works as follows.

The heated product on the hangers is conveyed to the chamber by a conveyor. A sprayer introduced into the chamber through the opening 2 applied charged powdered material to the product. The powder that has not settled on the product is poured into the hopper 3 and is removed by a recovery system.

Compressed air is supplied through the openings 9 of the tubes 8.

The upward flow of aerosol from the heated product is inhibited and receives a turbulent motion due to the fact that the wedge-shaped bent profiles create significant resistance to the movement of the flow.

Due to the wedge-shaped traps on the inside of the chamber and the air flow from the nozzles installed on the outside, the transport opening in the upper part of the chamber is closed to the flow of the aerosol rising from the heated product.

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Editor G. Volkova

Compiled by L.Yanushin

Tehred I. Veres Proofreader L. Patay

Order 4744/8 Circulation 681 Subscription of the USSR State Committee

for inventions and discoveries 113035, Moscow, Z-ZZ, Raushsk nab. 4/3

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

CAMERA FOR PNEUMOELECTROSTATIC APPLICATION OF POWDERED MATERIALS, containing walls with an opening for the sprayer and a transport opening, the upper part of which is formed by bent walls, and nozzles for supplying compressed air, characterized in that, in order to improve working conditions and reduce fire and explosion hazards of the chamber powder exit through the transport opening, the upper part of the latter is made with double walls, while the walls facing the inner chamber are wedge-shaped, and the walls are externally chamber side - concave addition, nozzles for supplying compressed air to the outside of the camera side, and their axes are directed towards the transport opening. SU „1255219 of FIG. 1 .1255219