SU1502128A1 - Device for applying coatings onto outer surfaces of tubular articles - Google Patents

Abstract

The invention relates to devices for spraying and applying liquids to the surface of products and can be used for applying paint and coating compositions to the outer surface of cylindrical tubes. The purpose of the invention is to improve the uniformity of coating. For this, the device is equipped with a pipe for the supply of compressed air and an annular liner installed in the housing. The liner and the annular chamber are placed coaxially with the annular gap between them and form annular cavities interconnected with the inner surface of the housing. The annular cavity between the inner surface of the housing and the liner communicates with the pipe for the supply of compressed air, and the annular cavity between the inner wall and the annular chamber with the outlet pipe. The outer diameter of the liner is made equal to the outer diameter of the annular chamber. 1 hp ff, 1 ill.

Description

The invention relates to devices for spraying and applying liquids on the surfaces of products and can be used to apply paint and coating compositions on the outer surface of cylindrical tubes.

The aim of the invention is to improve the uniformity of the coating.

The drawing shows a device for coating the outer surface of tubular products.

The device comprises a hollow cylindrical body 1, end caps 2 and 3 connected to it with axial openings for the passage of article 4, inlet 5 and outlet 6 nozzles.

An annular chamber 7 is installed in the housing 1 at the end cover 3, which is formed with outlet openings 8 directed at an acute angle to the inner surface of the housing 1. The chamber 7 communicates with the inlet 5.

In the housing 1 coaxially mounted ring liner 9.

The annular chamber 7 and the inserts 9 are installed with an annular gap 10 between them and form annular cavities 1 1 and 12 interconnected with the inner surface of the housing 1.

The annular cavity is communicated with the nozzle 13 for the supply of compressed air. The annular cavity 12 is in communication with the outlet pipe 6.

The outer diameter of the insert 9 is made equal to the outer diameter of the annular chamber 7. The article 4 is fixed on the guide 14 of the mechanism 15 for the longitudinal movement of articles.

The device works as follows.

The painted tubular product 4 is installed on the guide 14 and is driven by the mechanism 15 through the axial holes, then the covers 2 and 3 into the cavity of the housing 1.

The paint is supplied through the inlet pipe 5 under the pressure of 0.5 to 1.0 kgf / cm into the annular chamber 3. When leaving the openings 8, the annular intent the paint scab is crushed by jets of compressed .1.

SP

about to

to

00

coming in through the nozzle 13 into the cavity 11. In the annular gap 10 ob-), a fuzzy spray of paint is deposited, which is deposited on the surface of the product, 11e | a) 1, 15) Axis of the housing 1 part. the annular cavity 12 and the outlet pipe 6, which contributes to the vortex movement of the paint paint.

After applying k) aski to the entire, untouched surface of the product, the supply of paint is stopped and air pressure is compressed () () and product 4 is removed from gyy-: 1) of body 1 by means of mechapism 15.

- The adjustment of the dispersion of paint dispersion is determined by the change in pressure in the paint supply system and compressed air.

The opposite direction of the ink jets and compressed air in the; 1 of body 1 and vortex 1111 (. 11s () sconce; j) | tse1 ps of the sprayed stream k) askp noBbna KJT dispersion pacnbi. ia II |) avpoms p11 () stol tols1tspp1) 1 form- P1egos 11okr1 1T11.

Claims (2)

1. A device for panespepy coating on the paring surface of tubular products, inii, containing a hollow cyt. five 0 the body, end caps connected to it with axial openings for the passage of the product, inlet and branch pipes installed in the housing at one of the end covers, an annular chamber formed with outlet openings directed at an acute angle to the inner surface of the housing and communicated and a mechanism for the longitudinal movement of the product, characterized in that, in order to improve the uniformity of the coating, it is equipped with a pipe for the supply of compressed air and an annular insert installed in In this case, the insert and the annular chamber are placed with an annular gap between them and form annular cavities interconnected with the inner surface of the body, the annular cavity between the inner surface of the housing and the liner communicating with the compressed air supply the inner wall and the annular chamber communicated with the outlet pipe. 2. The device according to claim 1, characterized in that the spring diameter of the insert is made equal to the outer diameter of the annular chamber.