SU1246464A1 - Device for spraying and applying powder-like materials - Google Patents

Description

The invention relates to the application of coatings from triboelectric powder materials and can be mainly used for the production of protective and decorative, anti-corrosion, lighting, insulating and other types of coatings in manual and stationary spraying installations.

The aim of the invention is to grow-fO is fed into the distribution cavity

rhenium technological capabilities, increasing the degree and uniformity of charge and the deposition rate of charged powder particles.

The drawing shows the proposed device, the cut.

The device comprises a manifold in the form of a choke I, coupled with a butt pad 2, having an internal cavity 3 in the shape of a truncated cone, which is connected to channel 4 for supplying the powder-air mixture. The butt plate 2, when coupled with the hollow cylinder 5, forms a distribution cavity with the initial part 6 of the barrel 7, the conical divider 8 and the guide-. ribs 9, passing to the cylindrical part of the barrel 7 along helical lines and forming channels 10 for the passage of powder. The opposite end of the barrel 7 is made of a parabolic notch 11 and a fairing 12, which with end plugs 13 of the ribs 9 and channels 10 form a mixing cavity 14. The dielectric barrel 7 is mounted in a hollow cylinder 5 which is placed in a metal housing 15. The mixing cavity 14 communicates with the inner cavity of the tip 16, the screw-on cylinder 5 through the locking washer 17. The jig 16 on the outer side has a locking protrusion 18 and a chassis thread 19, and inside the tip 16, made in the form of a confusion 20, present through the neck 21, the diffuser 20 is placed obstructive element 23 with a fairing 24 attached schiys pins 25. On the outer side of the tip 16 is mounted pod15

20

25

thirty

3 through channel 4, fitting nick 2. In the distributor 3, the powder-air stream is broken by the splitters 9 into the channels 10. The grinders of the separate air mixture flow were acquired at tribocontact from 6 sec. 10. Ring collector .27 to accelerate the range from the inside elements (ribs - electrically connected from which the charge is removed or usefully uses from channels 10 charged individual streams in the bed of 14 are combined into a stream with a fuser 20, constricting the neck 21, braking electr speeds of 0.1 m / s, eg 24 and extend the 22 o Torch Adjust. but opened up to the jet About 35 was rolled with movable cylinder, moving it along the thread of the projection 18.

Due to the acceleration of 40 (draining) charge on the particle flux, the acquisition is due to the fact that on the working triboelements they can contact the padas in the zones where there is polarity. For the flow of charged parts, depending on the mode, the precipitation is additionally increased by 50.

Editor G, Velsk

Compiled by L. Yanushin

Tehred L. Serdyukova Proofreader A. Ip'yin

1167/1

Circulation 646 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

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

1246464

A secondary cylinder 26, which moves along the thread 19 from the locking washer 17 to the locking protrusion 18, allows the torch to be adjusted from maximally open to jet-like. Inside the cylinder 5 is placed the annular manifold 27.

The device works as follows. Powder mixture

3 through channel 4, fitting I and the butt plate 2. In the distribution cavity 3, the flow of the powder-air mixture is broken up by the splitter 8 and the ribs 9 into the channels 10. The crushed particles of the separate flows of the powder-air mixture become charged at three contact points with the walls of the channels 10. An annular current collector .27 to accelerate the charge charge from the inner surfaces of triboelements (fins - channel walls); electrically connected to choke 1 ,. from which the charge is removed to the ground or is useful. At the exit of the channels 10, the charged rotating separate flows in the mixing cavity 14 are combined into one common flow by the compressor 20, compressed in the neck 21, braked by the element 23 to a speed of 0.1 m / s, sent by the fairing 24 and expanded in the diffuser 22 о The adjustment of the torch from maximally open to jet-like is made by the movable cylinder 26, moving it along the thread 19 to the locking protrusion 18.

Due to the acceleration of relaxation (drainage) of charge on tribo-elements, the particle flux acquires a large charge, since on the working surface, triboelements they are more likely to come into contact without falling into zones where there is a charge of one polarity. Due to the deceleration of the flow of charged particles to 0.1 m / s, depending on the application conditions, the deposition coefficient is further increased.

Claims (1)

DEVICE FOR SPRAYING AND APPLYING POWDERED MATERIALS, comprising a housing, a hollow cylinder, a barrel mounted therein for triboelectric powder charging, a butt plate with a channel for supplying the powder-air mixture, made with an internal cavity in the form of a truncated cone in which the initial part of the barrel is located, made with a conical divider and ribs passing to the cylindrical part of the barrel, located on it along helical lines and forming channels with a hollow cylinder for the passage of powder, and at the end the parabolic recess is made in the central part of the barrel with a fairing in the center, forming a mixing cavity ς the end sections of the ribs and the cylinder, a nozzle containing a lock washer, a movable cylinder and a tip, the internal cavity of which is in communication with the mixing cavity and is made in the form of a confuser-diffuser nozzle with a neck between a confuser and a diffuser, and on the outside of the tip there is a fixing ledge and a running thread conjugated with a movable cylinder from the locking protrusion to the lock washer, mounted between the hollow cylinder and the tip, characterized in that, in order to expand technological capabilities, increase the degree and uniformity of the charge and the coefficient of deposition of charged powder particles, it is equipped with electrically connected collectors of conductive material, one of which is made in the form of a fitting and installed in the back plate and the other in the form of rings installed in a hollow cylinder, and a braking element fixed in the confuser-diffuser region of the tip. SU. .., 12.46464