SU1235541A1 - Paint sprayer - Google Patents

Description

The invention relates to devices for spraying and applying liquids on the surface of products, in particular paints and varnishes and other materials, and can be used, for example, for automatic painting of products.

The purpose of the invention is to increase the reliability of work and improve the quality of spraying.

The drawing shows the proposed device, obsh, ny view.

The paint sprayer includes a housing 1 with a cavity 2 supplying paint and an opening 3 for supplying air, a spray nozzle 4 with an inner conical surface 5.

The spray gun also contains a locking needle 7 placed along the axis of the housing 1 spring-loaded 6, having an outlet end 8 with a conical surface 9 forming an annular channel 10 for supplying paint to the conical part of the nozzle with the inner surface of the nozzle 4. The needle 7 is connected by a shank 11 with a diaphragm 12 located between the housing 1 and the lid 13, forming a chamber divided by the diaphragm 12 into two cavities 14 and 15, communicated respectively with a source of air supply (not shown) and a paint fitting 16. In the locking needle 7 is made along the axis of the channel 17 of the air supply, communicated with the cavity 14.

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In addition, on the housing 1 of the sprayer is attached nozzles 18 with an outlet 19, forming with its internal cavity a mixing chamber 20.

The spray works as follows.

When compressed air is fed into the hole 3, it interacts with the diaphragm 12, which, overcoming the pressure force of the paint material supplied to the opposite side of the diaphragm 12 through the cavity 2 and the fitting 16 of the elastic spring 6, moves the locking needle 7 connected with it forward opening the conical part 5 of the nozzle 4. At the same time, the paintwork material supplied to the cavity 15 through the channel 2 and the fitting 16 leaves the formed annular channel 10 for supplying paint between the conical surface 5 of the nozzle 4 and the outer conical surface Tew 9 shutoff needle 7.

Part of the compressed air flow through the opening 3 to the diaphragm 12 through the channel 17 along the axis of the locking needle 7 is converted into a conical flow, which is mixed with a conical flow of paint in the conical part of the nozzle 4 and the mixing chamber 20, after which it is converted into a torch due to slit-shaped output part 19 nozzle 18.

Claims (2)

1. SPRAY SPRAY, comprising a housing with an air supply channel, a spray nozzle with an internal conical surface, a spring-loaded locking needle placed along the axis of the housing, having an output end with a conical surface forming an annular channel for supplying paint with the internal surface of the nozzle, and connected with a shank in the chamber, a diaphragm dividing the latter into a cavity communicating with the air supply source, and a cavity communicating with the paint supply channel, characterized in that, in order to increase over In order to improve operation and improve the quality of atomization, the conical surfaces of the nozzle and needle are made with large bases to the outlet end of the nozzle, the latter being protruding relative to the end of the needle, the air supply channel is made along the axis of the needle and communicates with the chamber cavity communicating with the air supply source, and the spring is placed in a cavity in communication with the paint supply channel. 2. Paint sprayer on π. 1, characterized in that it is equipped with a nozzle mounted on the housing in front of the nozzle, forming a mixing chamber with its internal cavity with the nozzle. yu os joint venture joint venture 4 ^