CS254571B1 - Device for the marking of objects - Google Patents

Abstract

Color coding equipment spraying the ink is pneumatic the spraying unit is formed by a piston rod pneuváloe, dosing paint is gravity from the tray. The device does not require color filtration is especially useful for marking groups when sorting wood.

Description

The invention relates to a device for marking articles by spraying colored spots.

The devices previously known and used for this marking use conventional spraying devices for spraying paints, initially intended to form coating layers over the entire surface of an object. These devices are designed for spraying paints, they are very accurate and therefore not very resistant. They require color filtering from coarser mechanical impurities, as well as accurate color dosing using valves, mostly electromagnetic. The spraying is carried out either pneumatically or electromagnetically. The equipment is large and complex, it must be adapted for short spraying of branded stains. Disadvantages of said devices are eliminated by the device according to the invention.

It consists in that it comprises a spray piston fixedly connected to the pneumatic piston, with a gravity feed inlet from the reservoir, wherein the smallest nozzle opening on the lance is of the order of magnitude larger than the solid particles contained in the marking ink.

The device according to the invention is very simple, it does not require filtering of normal quality paint from mechanical impurities. Marking of articles is done in batches of paint, without spraying it.

The device consists of a special pneumatic cylinder, on whose piston rod is directly created its own piston for spraying paint. The ratio of the surfaces of the two pistons gives the paint pressure for the injection. The stroke of the piston determines the amount of paint per mark. Filling of the dose into the spraying cylinder is carried out by gravity from the reservoir. The spray nozzle is not intended to be atomized and may be of relatively large diameter, so that the normal quality paint does not need to be filtered. It is shifted by a small H value above the highest level in the reservoir to prevent spontaneous paint leakage. The lance to the nozzle is very small in diameter because it affects the color dose depending on the level of the reservoir. The number of adjacent units is determined by the required number of color combinations for marking.

An example of an embodiment of the device according to the invention is shown in the figure. The device consists of a pneumatic cylinder with a working piston 2, the piston rod of which is directly formed its own spray piston 2. Both pistons 2, 2 are returned to the basic position by a spring 4. In the basic position the felt 2 opens the ink supply from the container 2 into the spray roller. At a predetermined position of the labeled article 2, ^an impulse is given which releases the compressed air inlet in front of the piston 2. Thus, both pistons 2, 3 are pushed into the working position and the respective ink dose is sprayed through the nozzle 2 in a similar spot. marked item 2 ·

Claims (1)

SUBJECT OF THE INVENTION Apparatus for marking articles, in particular wood blanks and the like, by ink spraying, characterized in that they comprise a spray piston (3) firmly connected to a felt (2) of a pneumatic cylinder, with a gravity dosing supply from the reservoir (5); 6) the lance of the lance is of the order of magnitude larger than the solid particles contained in the paint.