CS215455B1 - Apparatus for controlling the dispensing organs for liquids, in particular hand-held decorative spray guns - Google Patents

Abstract

The invention solves the problem of uniform repeatability of the shape, size and position of a decorative color spot on an object without dependence on the experience of the operator. The essence of the invention is the use of compressed air, the dose of which, admitted into the air chamber under the membrane, which is connected to the needles of the spray guns, causes rapid opening of the nozzles and the simultaneous gradual leakage of this dose into the air causes smooth closing of the nozzles with a certain adjustable delay. The invention can also be used in haberdashery production, or where it is necessary to control the dosing organ for liquids in a simple way in adjustable time intervals without using timing relays.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling dispensing organs for liquids.

In some industries it is used to create decorative color coatings, for example in the jewelery industry to decorate buttons, hand-held decorative spray guns, either untreated or specially modified for a particular purpose. The spray guns are manually operated by the operator, both the nozzle nozzle distance, gun direction and position relative to the object to be decorated, and so on! and the spray length and hence the amount of liquid to be applied. The shape, size and position of the decorative color trace on the object depends on the operator's experience and the sensitivity of the spray gun control. Due to this, the repeatability of both the shape and size and the position of the decorative spot on the object cannot be assured evenly and the sprayed liquid, i.e. the paint or metal salt solution, is uneconomical. Another disadvantage of this method is low labor productivity.

Known is a device for controlling several spray guns at a time which removes some of the above-mentioned drawbacks, in particular the dependence of gun nozzle distance, gun direction and position relative to the object on operator experience and low productivity, since several spray guns are mounted side by side in and below the holder at a pre-tested distance, similar objects are arranged straightened in a separate fixture, the needles of all spray guns being actuated at the same time as they are hinged by hinges on a single rod. However, even here the operator controls them manually, so that the dependence of the length of the cut and hence the size, shape and position of the decorative traces on the object and the economy of use of the liquid depend on the experience of the operator.

These drawbacks are overcome by a device for controlling dispensing organs for liquids, in particular needles of hand decorative spray guns, in which the dispensing organs are hinged by means of hinges on a common rod according to the invention, which is based on the rod resting on a tappet connected to the air chamber membrane. interconnected by piping to a three-way valve to which a first source of compressed air, a second manifold, a pressure vessel and a third manifold are connected to a throttle valve;

Claims (1)

SUBJECT Apparatus for controlling dispensing organs for liquids, in particular needles of hand decorative spray guns, in which the dispensing organs are suspended by means of hinges on a common rod, characterized in that the rod (17) is supported on a tappet (3) connected to the air diaphragm (2) the chambers (1) connected by a pipe (8) to the three-way valve 21155 the three-way valve slider is connected to the control mechanism. The device according to the invention achieves uniform repeatability of the shape, dimensions and placement of the decorative traces on the articles to be decorated, as well as the economy of use of the spray liquid independent of the operator's experience. The device according to the invention is apparent from the description and the attached drawing, in which the arrangement in the exemplary embodiment is schematically illustrated. To the diaphragm 2 of the air chamber X is connected a tappet 3 on which the rod 17 is supported, onto which the needles 15 of the decorative spray guns 14 are hinged by means of hinges 16, adjustablely fixed in the frame 18 to which the air chamber 1 is attached. connected to the three-way valve 5 to which the pressure vessel 4 is connected by the second line 9, the compressed air source 12 through the first line 10 and the throttle valve 7 through the third line 11. The three-way valve 5 is connected to the control mechanism 13. The device works as follows: In the position where the decorated objects are not placed under the nozzles of the spray gun 14, the actuating mechanism 13 keeps the valve 6 of the three-way valve 5 in the upper extreme position. The compressed air from the compressed air source 12 fills the pressure vessel 4 through the ducts 10 and 9. After the decorated articles have been moved under the nozzle of the spray gun 14, the actuating mechanism 13 moves the valve 6 of the three-way valve 5 to the lower limit position. The compressed air supply from the source 12 is interrupted. The compressed air from the pressure vessel 4 flows through the ducts 9 and 8 below the diaphragm 2 of the air chamber 1 and causes a sudden deformation of the diaphragm 2 which is transferred by the tappet 3 to the rod 17 and causes a stroke 15 of the spray guns. via a duct 11 via a choke 7 to the atmosphere. As a result, there is a continuous pressure drop under the diaphragm 2 of the air chamber 1, which causes a smooth alignment of the diaphragm 2 with a certain adjustable delay, and thus by means of the tappet 3, rod 17 and hinges 16 smoothly lower the spray guns 15 and stop spraying. OF THE INVENTION t a compressed air source (12) connected to the first conduit (10), a pressure vessel (4) through a second conduit (9) and a throttle valve (7) through a third conduit (11), the three-way gate (6) The valve (5) is connected to the actuating mechanism (13).