JPH01299657A - Apparatus for control discharge of weighed amount of liquid finely distributed in gas - Google Patents

Abstract

PURPOSE: To make it possible to a mixture composed of liquid and gas on a moving carrier material by providing the apparatus with a nozzle assembly which arbitrarily has an adjacent stabilizing pipe and acts to generate the mixture at an outflow velocity at which the mixture is pulsated in synchronization with a cycle velocity. CONSTITUTION: A venturi nozzle 1 consisting of an air nozzle A, a mixing chamber B and a mixing nozzle C has a rotary sliding valve 11 fixed to a spindle 12 at an inlet end. The spindle 12 is driven by a motor M in synchronization with the number of nozzle apertures 13 as a function at the desired velocity. The stabilizing pipe 14 is fitted to the mixing nozzle C and the metered material emerges from the end of the pipe 14 through the slot-like aperture 15. The aperture 15 is arranged along the length of the spindle 12. As a result, the stable coating application is made possible and the apparatus is applicable to the pharmaceuticals application to confectionery.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a method for applying an emulsion to passing solid carrier materials so that these carrier materials can be treated or deposited in a controlled manner at predetermined time intervals. The present invention relates to a device for the controlled release of metered quantities of liquids in order to apply finely distributed liquids in gases, including liquids and suspensions. According to the invention, for example, a liquid lubricant or separating compound formulation can be applied to the compression surface of a press mold in a tablet making machine as described above, but in addition the pharmaceutical active substance can be applied to the compression surface of a press mold in a tablet making machine. Alternatively, dye solutions or sugar formulations can be applied to confectionery such as chocolate.

[Prior art]

Known from the prior art is an apparatus described in US Pat. No. 4,323,530 for compressing granules to form tablets, tablet cores, etc.

OBJECTS OF THE INVENTION The present invention provides a method for dispensing a finely distributed metered amount of liquid in a gas that allows relatively large amounts of liquid to be applied to a moving carrier material and that maintains controlled release of the metered amount. The purpose of the present invention is to provide a device for controlling the release of

[Structure of the invention]

The apparatus according to the invention optionally has a stabilizing tube adjacent to the outlet of the nozzle, which allows the liquid and gas to flow at a predetermined outflow rate that is pulsed in synchronization with the cycle rate at which the workpiece travels past the outlet opening. and a nozzle assembly for producing and delivering a mixture of and in a controlled B manner.

Thus, in one embodiment of the device according to the invention, the nozzle assembly comprises one or more Venturi nozzles;
Each Venturi nozzle consists of an air nozzle, a mixing chamber adjacent to this air nozzle, and a mixing nozzle connected to this mixture. Adjacent are valves actuated by or electrically, the control unit receiving signals from the sensors. This sensor is mechanical,
It responds to the presence of solid carrier material to be treated in front of the nozzle opening by optical or electromagnetic actuation.

Gases such as air, nitrogen or noble gases are used as propellants. Upon approach of the carrier material, the control device simply opens the valve quite instantaneously, and the transfer medium flowing through the Venturi nozzle sucks in a predetermined amount of liquid to form a mixture of liquid and gas, which The accelerated and quantified mixture is applied in a controlled manner to the surface to be treated. Liquid is drawn from the reservoir into a suction channel having a detent valve that supplies the required liquid to the Venturi nozzle. Controlled application of the mixture is achieved by synchronization of the pulses and the geometry of the nozzle opening, which is, for example, slot-like or oval-shaped.

A preferred embodiment consists of a Venturi nozzle consisting of one or more air nozzles, a mixing chamber and one or more mixing nozzles together with a rotary slide valve. A rotary slide valve is adjacent to and functionally interacts with the venturi nozzle.

A rotary slide valve, which rests on a spindle and is designed to rotate in coordination with this spindle, serves as a compressed air valve for a Venturi nozzle fixedly arranged directly behind it. The vacuum created by the venturi nozzle draws in the liquid, and a jet of transport medium, e.g. an air jet, from the venturi nozzle absorbs the liquid jet and the resulting mixture of liquid and gas is accelerated towards the outlet opening. Ru.

In order to achieve a dense formation or -like velocity distribution of the jet exiting the Venturi nozzle and to prevent any particles of the medium from straying before reaching the solid carrier material to be treated, It is expedient to provide a stabilization zone or tube behind it. If desired, a deflector or deflector may be provided in this stabilizing tube to deflect the resulting pulsating jet toward the workpiece.

The deposit or treatment agent applied to the workpiece is in the form of dots or dashes if the exit opening is circular.

The corresponding surface of the workpiece passing through is treated in a square or rectangular pattern if the outlet openings are slot-shaped.

If a rotary slide valve is used, a drum acting as a chin plate rotating synchronously with this rotary slide valve is fixed to the inner shaft of the rotary slide valve before the outlet slot, optionally at the end of the stabilizing tube. Then, other types of applications can be achieved, possibly with different applications in different directions. Thus, for example, the upper die and lower die of a tablet making machine can be treated differently to apply different patterns such as circles, stars, alphabet letters, etc. to a substrate such as chocolate. In order to modify the emitted pulsating jet, it is most advantageous if the template is provided directly in front of the outlet opening of the stabilization zone. It is clear that other types of valves can also be used to modify the jet outflow, provided the template is synchronized with the number of cycles of the punch.

Generally, compressed air for a Venturi nozzle is supplied via a micrometering valve as a function of the number and speed with which the workpiece moves past the nozzle opening, i.e. in tablet presses, e.g. In this case, this rotary slide valve achieves the above function.

For this purpose, the number of revolutions of the spindle provided with the rotary slide valve is determined as a function of the number and speed with which the workpiece is moved past the nozzle opening.

According to another advantageous embodiment of the invention, the nozzle assembly includes an injection nozzle valve controlled synchronously with a predetermined circulation rate by a pulsating metering pump. The injection nozzle valve essentially consists of a valve seat, a piston connected to the valve seat and having a biasing spring, and a discharge connection. Adjacent to the outlet opening of the injection nozzle valve is a stabilizing tube, which has an air inlet opening in the area immediately behind the outlet opening of the injection nozzle valve, and which stabilizes the tube. The air inlet opening is axially arranged with respect to the outlet opening of the injection nozzle valve. The other end of the stabilizing tube is provided with the actual outlet opening. However, it is also possible to accommodate a deflection device in this area, which deflection device may be supported for rotation therewith by a spindle or may be fixed to the end of the stabilizing tube. The metered pulsating material is deflected by these deflectors and ejected from an opening in the outer casing of the stabilizing tube towards the workpiece.

Also, templates positioned in front of openings in the casing that replace these openings can serve to modify the application pattern of the material on the carrier to be treated.

A pulsating metering pump in the form of a piston pump can, for example, be controlled by a camshaft, the cam of which operates in synchronization with the cycle speed of the workpiece moving beside it. When activated, this pulsating metering pump pumps a quantity of liquid supplied to it from the storage tank into the space between the piston and the nozzle of the injection nozzle valve, pushing the piston against the biasing spring. , thus opening a passage through the valve cone to the stabilizing tube. As soon as the metering pump has again blocked the liquid from moving towards the injection nozzle valve, i.e. as soon as a certain amount of liquid has escaped from the opening of the valve, the valve cone is pressed against its valve seat by the rebound force of the spring. . A drive assembly (for example an electric motor) drives the spindle of the metering pump and is controlled by a regulating device. The regulating device receives the impulses of the drive assembly by means of a sensor in synchronization with the cycle speed of the workpiece traveling past. Of course, other known devices for transmitting forces and pulses may be used to serve these purposes; to avoid undesired backflow, a non-return valve may be provided between the metering pump and the reservoir. good.

With the nozzle combination described above, 0 per stroke
．． It is possible to deliver amounts of liquid ranging from 0.01 to 0.2 d onto the treated surface, and this combination can be used in a tablet machine to produce up to 20,000 compressed blanks in one hour. It is possible.

〔Example〕

The apparatus according to the invention will now be described with reference to FIGS. 1 to 3. FIG.

1 and 2 show a bench eri nozzle 1, which includes one or more air nozzles A and one
It consists of one or more mixing chambers B and one or more mixing nozzles C. Adjacent to the Venturi nozzle are one or more suction channels 2 extending through suction conduits to a storage container;
A detent valve 7 is positioned in this suction line.

Furthermore, a propellant duct 3 connecting the valve 4 to the venturi nozzle l, a pressure gas connection 5 and a sensor 9 for generating a signal in cooperation with a control device 10 for actuating the valve 4 are provided. It is provided.

In FIG. 2, one or more air nozzles A;
A venturi nozzle 1 consisting of one or more mixing chambers B and one or more mixing nozzles C has at its inlet end a rotary slide valve 11 fixed to a spindle 12 . are driven synchronously by motor M at the desired speed as a function of the number of nozzle openings 13. In an advantageous embodiment, the stabilizing tube 14 fits snugly into the mixing nozzle C, and the metered material exits the end of said tube 14 through a slot-like opening 15. The openings 15 are preferably arranged along the length of the spindle 12 and a deflection device 16 is provided in the spindle 12 or in an extension of the spindle 12 to deflect the metered material at right angles. on its own spindle or
Alternatively, it is preferable to fix it to the end of the stabilizing tube 14. In addition, a template 17 can be provided in front of the outlet opening for geometrically varying application of the material to the zone to be treated.

In another embodiment, the template 17 itself forms an outlet opening 15 at the end of the stabilizing tube 14, thus forming an extension of the stabilizing tube. Further, the template 17 is preferably provided rotatably, and its driving is performed by the adjusting device 10.
and synchronized with the cycle rate.

FIG. 3 shows a nozzle assembly with an injection nozzle in cross-section. The injection nozzle valve 8 is controlled by a pulsating metering pump 18 synchronously with the desired cycle rate. The injection nozzle valve 8 includes a valve seat 19, a piston 20, a biasing spring 21, and a discharge communication portion 22. Interrupted by circularly arranged air inlet openings 23, a stabilizing tube 14 is located at the valve opening. The end of this stabilizing tube is provided with a slot 15 as an outlet opening. A deflection device 16 on the spindle 12 ensures that the material is deflected and passes through the template 17 as far as possible before reaching the desired zone. This template 17 ensures that the application of material to the zone to be treated is modified. Motor M
For example, the piston pump 18 is driven via a camshaft 24 having a cam 25. Liquid is transferred by means of a piston pump 18 from a storage container 6 protected by a non-return valve 7 to the injection nozzle valve.

Often, in embodiments with a venturi nozzle together with a rotary slide valve and a stabilizing tube, in the region of the venturi offset from the rotary slide bore and also in the region of the stabilizing tube 14, and in embodiments with an injection valve. , the brush or wiper elements are placed on the spindle 12 to keep these elements free of any deposits or deposits from the liquid.
It is a good idea to set it up at

[Brief explanation of the drawing]

1 and 2 are schematic diagrams showing a venturi nozzle consisting of an air nozzle, a mixing chamber, and a mixing nozzle; FIG. 3 is a cross-sectional view of a nozzle assembly with an injection nozzle valve. 1 - Venturi nozzle, A - Air nozzle, B - Mixing chamber, c - Mixing nozzle, 2 - Suction channel, 4 - -・Valve, 6
・−・−Storage container, 7・−1−−・Return valve, 11
・-・-・-Rotary slide valve, 12----Spindle, 1
3---Nozzle opening, 14-- Stabilizing tube, 16
-・-Missing device, 17-...Template, 18-
・−・−Metering pump.

Claims (1)

[Claims] 1. Controlling a measured amount of liquid distributed in a gas, or in the form of a suspension or emulsion, onto a solid carrier material that travels past it at predetermined time intervals. a nozzle, optionally having an adjacent stabilizing tube, for producing a mixture of liquid and vapor at a predetermined outflow rate pulsed in synchronization with the sile speed; A device characterized by comprising an assembly. 2. The nozzle assembly comprises one or more bench lily nozzles (1) having one or more air nozzles A together with one or more mixing chambers B and one or more mixing nozzles C. , a suction channel (2) adjacent to the bench lily nozzle, a propellant duct (3) connecting the valve (4) to the bench lily nozzle (1), and a pressure gas communication section, which connects the valve (4) to the vent lily nozzle (1). 2. Device according to claim 1, characterized in that there is provided a sensor (P) associated with an actuating control device, said suction channel (2) communicating with a storage container (6) and having a non-return valve (7). 3. A bench lily nozzle (1) consisting of one or more air nozzles A, one or more mixing chambers B, and one or more mixing nozzles C is connected to a spindle (12
) and a rotary slide valve (11) which can be actuated so that said spindle (12) moves synchronously as a function of the number of nozzle openings (13) at a desired cycle rate and which fits snugly into the mixing nozzle C. at its inlet end, the metered material exits from the end of the stabilizing tube (14) through a slotted opening (15). and, if desired, a deflection device provided on the spindle (12) or its own spindle on its extension, or fixed on the end of the stabilizing tube, which deflects the metered material at right angles. Prepare and, if necessary,
3. Apparatus according to claim 1, characterized in that a template is provided in front of the outlet opening for varying the application of material to the zone to be treated. 4. The nozzle assembly has an injection nozzle valve (8) controlled synchronously with the desired cycle rate by a pulsating metering pump (18).
), the injection nozzle valve includes a valve seat (19), a piston (20), a biasing spring (21), and a discharge communication part (22). , adjoining is a stabilizing tube (14) with an air inlet opening (23), and at the end of the injection nozzle valve is a slot-like opening (15) as an outlet opening for the metered material. If desired, a deflection device (16) is positioned on the spindle (12) or fixed to the end of the stabilizing tube to deflect the metered material at right angles, and if desired ,
2. Device according to claim 1, characterized in that a template (17) is provided in front of the outlet opening so that the material can be applied in a modified manner to the zone to be treated. 5. A device according to claim 3 or 4, wherein a brush or wiper element is provided in the region of the stabilizing tube (14), wherein said brush or wiper element is offset relative to the rotating slide bore. A device characterized in that it is provided in region B of a bench lily nozzle. 6. The sensor (P) drives the metering pump motor M by the control device (10), and the metering pump is a piston pump (
18), the piston pump engages a cam (25) of the camshaft (24), and the pressure line forms a communication between the metering pump and the injection nozzle;
6. Device according to claim 4, characterized in that the metering pump is connected to the storage container via a line with a non-return valve (7).