RU1811909C - Device for application of powdered materials on articles - Google Patents

Abstract

Use: relates to the technique of applying powder materials to products while improving the quality of the coating by uniformly supplying the powder material. SUMMARY OF THE INVENTION: the device comprises a spray gun connected via a hose to a powder collection device located in the bunker of the yeast chamber, having an extension - / 5th and second: first outlet at 6th; the formation between them of a pipe-ring annular polrbti and a nipple placed in the housing for communication. with a compressed feed source; air; the device contains an additional fitting for discharging the air-powder mixture with an internal cavity, made in the form of a venturi with a diameter equal to the passage section of the nozzle, and movably connected to the housing of the device for collecting powder, while the fitting for removing the air-powder mixture and the nozzle are installed coaxially . 2 ill. (Л с ЧкЬа

Description

FIELD OF THE INVENTION This invention relates to a technique for applying Norosha materials to articles. An object of the invention is to improve the quality of the coating by uniformly supplying the powder material to the spray guns, -. :.; -Y .: v.- ;. ; :;;-TO

In FIG. 1 shows a general view of a device for applying powder materials to products; Fig. 2 is a device for collecting powder material.

 The device comprises a device for collecting powder material 1, which is suspended on hoses 2 and 3 in the installation, fluidization 4 and communicates with a hose 3 With a spray 5 installed in the spray chamber b and a hose 2 with a source of compressed air. The fluidizing unit 4 communicates with a hose 7 with a container of powder and a hose 8 with a source of compressed air.

 The device 1 comprises a housing 9, which encloses a pipe 10 extending downwardly extending downwardly into it, forming an annular ring between the housing and the pipe; of the cavity 11, in the housing 9 there is a fitting 12 for communicating the cavity 11 with the compressed air source and the fitting 13 with the lock nut 14 for discharging the air-powder mixture movably coaxially with the nozzle 10, the confuser 15, the neck 16, the diffuser 17.

The implementation of the nozzle with an internal cavity in the form of a venturi allows to increase the vacuum at the upper part of the nozzle. .- The device operates as follows.

Pumped into the fluidization unit 4 through a hose 7, powder material, compressed air is supplied through a hose 8,

after which the powder material is fluidized and the device 1 is immersed in the powder material, compressed air is supplied through the nozzle 12 into the annular cavity 10. A rarefaction area appears at the upper cut of the pipe 11. The vacuum is regulated by a nozzle 13 with an internal cavity in the form of a venturi with a diameter equal to the bore of the nozzle 11; the nozzle 13 is movably connected to the housing 9, which allows changing the amount of powder in the air-powder mixture .;

Under the action of rarefaction, the powder material is captured by the air stream and lifted through the hose 3 to the atomizer 5. Spanning the powder particles through the atomizer is charged and deposited on a grounded article in the chamber.

Improving the quality of the coating is achieved by increasing the uniformity of the flow of powder material to the sprayer by adjusting the amount of powder material in the air-powder mixture, since stable and adjustable conditions are created on the upper section of the nozzle 11 for the removal of powder material from the fluidization unit:

The formula is bounded and a device for applying powder materials to articles containing a spray gun connected via a hose to a powder intake device located in the fluidization hopper, having a nozzle expanding downwardly, covering the nozzle body to form an annular cavity between the housing and the nozzle and a fitting located in the housing for communication with compressed air supply sources, which requires that, in order to improve the quality of the coating by uniformly supplying powder material la, it is equipped with a nozzle for discharging the air-powder mixture with an internal cavity made in the form of a venturi with a neck diameter equal to the minimum passage section of the nozzle, with atoM the nozzle for discharging the air-powder mixture is installed by the air and can be moved relative to the body and the nozzle; :

Air powder

mixture