WO2015166047A2

WO2015166047A2 - Device and method for the measured distribution of pumpable masses

Info

Publication number: WO2015166047A2
Application number: PCT/EP2015/059507
Authority: WO
Inventors: Johannes Haas; Josef Haas; Stefan Jiraschek; Frank WOUTERS; Frank VAN ZESSEN
Original assignee: Haas Food Equipment Gmbh
Priority date: 2014-04-30
Filing date: 2015-04-30
Publication date: 2015-11-05
Also published as: AT515751A1; AT515751B1; TW201600430A; WO2015166047A3; AR100062A1

Abstract

The invention relates to a device and method for the measured distribution of one or more pumpable and solid inclusion-containing masses (1), such as, in particular fat-containing creams with solid parts, chocolate cream with nut pieces or pressurized and gasified fat cream with solid pieces, which are conveyed from a mass container to one or more outlet nozzles in order to exit the outlet nozzles.

Description

Apparatus and method for the metered delivery of pumpable masses

The invention relates to a device and a method for the metered output of pumpable and piece goods containing masses.

In WO 201 1/001267 an apparatus and a method is disclosed in which a pumpable mass, optionally containing general cargo, can be transported from a reservoir to a dosing. For this purpose, a pump room is provided, the one

Supply line and extending up to a nozzle outlet discharge line for the mass comprises. In the pump chamber, a cylindrical piston is arranged to be linearly movable. The piston is surrounded in particular by a hollow cylinder. This hollow cylinder is mounted on the inner wall of the pump chamber. Furthermore, drives are provided so that the hollow cylinder and the piston can be moved separately from each other and optionally independently. The hollow cylinder is used in particular to allow a selective opening or the selective closure of the inlet and outlet lines of the pump chamber. Thus, in a first position, the mass supply opening of the pump chamber can be closed. Will the cylinder pushed further into the pump chamber, so both provided in the pump space mass openings are closed. Regardless, a pump piston can be moved, by which the volume of the pump chamber is variable. By suitable choice of the position and the movement of the components can through this

Configuration, as described in WO 201 1/001267, the mass be transported from the reservoir to the dosing destination. In particular, it is advantageous if the piston is moved back after the output of the desired amount, so that the remaining mass in the mass exit line is retracted to prevent dripping.

Due to the selected components of this construction, it is possible, for example, in contrast to gear pumps, creams or pumpable masses with

To promote solid components such as nut pieces. In particular, chocolate creams with pieces of nut or other fatty creams with other solid components can be dispensed by the construction of WO 201 1/001267.

However, in practice, disadvantages of this device have been found.

In particular, low-viscosity masses cause dripping. To prevent this, according to the prior art, a flap or in the

Outlet line penetrating slide cause a mechanical shut-off of the channel. However, in the case of bulk goods, this is not possible because the solid bodies, such as a nut splitter, prevent easy closure by flaps or sliders.

Another problem occurs with gassed masses. These masses are fumigated in a premixing chamber with, for example, air or carbon dioxide. After

Fumigation, these masses have an elevated pressure of up to 7 or 8 bar. To prevent this pressure from escaping through the nozzle opening, the

Device be adapted to prevent at any time and in any position a direct escape of pressure through the nozzle outlet.

The object of the invention is now to overcome the disadvantages of the prior art

overcome and in particular the above-mentioned construction improve that a reliable closure of the nozzle, even with gassed, pressurized and / or cargo containing masses takes place.

The object of the invention is particularly characterized by the features of

independent claims solved.

The invention particularly relates to a device for the metered delivery of one or more pumpable and solid inclusions containing masses, such as in particular fatty creams with solid splinters, chocolate creams with Nussstücken or pressurized and fumigated fat creams with solid pieces of a

Mass reservoir to one or more outlet nozzles are promoted to exit through the outlet nozzles, comprising a pumping space with a

Mass feed opening and a mass exit opening, one through the

Mass supply opening into the pump room opening and from one

Mass reservoir coming mass supply line, one through the

Mass outlet opening of the pump chamber outgoing leading to an outlet nozzle mass outlet line, a pump piston for changing the

Pump space volume, which is arranged linearly displaceable and partially limits the pump space; a closure device having a first position in which the mass feed opening and the mass exit opening are open to the pumping chamber having a second position in which the mass supply opening is closed by the closure device and the mass exit opening is opened to the pumping chamber and which has a third position, in the the

Mass supply opening and the mass exit opening of the

Closing device are closed, it being optionally provided that the outlet nozzle a flexible, tubular nozzle line and arranged within the nozzle line and emerging at the free end of the nozzle line

Düsenkanal has that a nozzle closure device is provided, which has a transversely to the course of the nozzle channel movable shut-off that the shut-off element has a closed position in which the shut-off is pressed to the outside of the flexible nozzle line, thereby the flexible

Deformed nozzle line and the nozzle channel is closed at a closure point, and / or that in the closed position of the nozzle channel in the longitudinal cross-sectional plane has a wedge shape emanating from the closure point. Optionally, it is provided that the shut-off element and the closure point is provided in the course of the nozzle line away from the free end of the nozzle line, and / or that in the closed position of the nozzle channel in the longitudinal cross-sectional plane has a double wedge shape emanating from the closure point on both sides.

Optionally, it is provided that a counter-holder is provided, that between the counter-holder and the shut-off the nozzle line is provided that in the closed position, the nozzle line between the anvil and the

Trapped blocking element and is elastically deformed, so that the nozzle channel is closed, and / or that an open position is provided, in which the

Contra-holder and the shut-off have a distance from each other, which is greater than the distance of the counter-holder of the shut-off in the

Closure position, so that in the open position of the nozzle channel is at least partially, preferably fully open.

Optionally, it is provided that the shut-off element and / or the counter-holder comprises a cam-shaped, wedge-shaped or finger-shaped shut-off extension which projects in the direction of the nozzle line in the region of the closure point.

Optionally, it is provided that the shut-off on a

Absperrgrundkörper is provided that the anvil on a

Contra-base is provided, and / or that a shut-off is provided, which is a relative movement between the Absperrgrundkörper and the

Gegenhaltergrundkörper and / or between the shut-off and the

Counterhold causes, so that by controlling and / or regulating the shut-off the outlet nozzle and in particular the nozzle channel of the nozzle line is closed and obvious.

Optionally, it is provided that the shut-off drive is a linear drive, which causes a linear displacement of the shut-off against the anvil.

Optionally, it is provided that a plurality of outlet nozzles are provided, each having a nozzle line and a shut-off for closing the nozzle channel of the respective nozzle line. Optionally, it is provided that a plurality of shut-off elements are arranged on a single Absperrgrundkörper, so by movement of a

Absperrgrundkörpers several shut-off movable and thereby a plurality of nozzle lines are closed.

Optionally, it is provided that a plurality of counter-holders are arranged on a single counter-holder main body, wherein the counter-holder main body is arranged to be movable or stationary, in order to move relative to the

Absperrgrundkörpers cause a closure of the outlet nozzle.

Optionally, it is provided that per outlet nozzle a pump chamber with a mass supply opening and a mass exit opening, one through the

Mass supply opening into the pump room opening and from one

Mass reservoir coming mass supply line, one through the

Mass outlet opening from the pump chamber outgoing to the respective outlet nozzle leading mass exit line, a pump piston and a closure device are provided, the pump piston and the closure devices of several outlet nozzles are jointly controllable, controllable and / or movable,

or that for a plurality of outlet nozzles, a single pump chamber with a

Mass feed opening and a mass exit opening, one through the

Mass supply opening into the pump room opening and from one

Mass reservoir coming mass supply line, one through the

Mass outlet opening of the pump chamber outgoing to the respective outlet nozzle leading mass outlet line, a pump piston and a closure device are provided, wherein the pump piston and the closure devices of a plurality of outlet nozzles are jointly controllable, controllable and / or movable.

Optionally, it is provided that the pump piston and the closure device has a time after the metered output of a mass, but provided in time before the closure of the outlet nozzle retraction mode in which the closure device is in the second position in which the

Closed mass supply opening of the closure device and the mass exit opening is opened to the pump chamber, and in which the pump piston is to increase the pump chamber volume in a return movement, so that the mass located in the free end of the nozzle line is withdrawn or remains and by the closing of the nozzle line through the shut-off and the associated reduction in the volume of the nozzle channel remains drip-free in the nozzle channel.

Optionally, it is provided that the Absperrgrundkörper as horizontally extending and horizontally displaceable elongated body and / or as

plate-shaped body is designed with openings for the nozzle lines.

Optionally, it is provided that the closure device comprises a closing slide which can be displaced along a closing direction, the outer shape of which is adapted to the shape of the pumping space, so that the mass feed opening and the mass outlet opening can be closed by displacing the closing slide along the closing direction, and its inner shape corresponds to the shape of the closure

Pump piston is adjusted so that the pump piston sealingly along the

Slider is slidably disposed, and / or that of

Shut-off valve and the pump piston are displaceable and drivable together or separately along the closing direction with respect to the pumping space and together define and seal the pumping space on one side.

Optionally, it is provided that the pump chamber normal to

Having closure direction arranged pump space cross-section, that the

Pump piston has a piston arranged normal to the direction of closure piston cross-section, that the closure slide is designed as a hollow body whose normal to the closure direction arranged free inner cross section corresponds to the piston cross section and its normal to the closure direction arranged outer cross section corresponds to the pump space cross section, and / or that the pump piston sealing in the closure slide and the closure slide is mounted sealingly in the pump room.

Optionally, it is provided that the pump piston has a circular cross section, that the closure slide is designed as a hollow cylinder and that the pump chamber is cylindrical. More particularly, the invention relates to a method for the metered delivery of pumpable and solid inclusions containing masses such as fatty creams with solid chips, chocolate creams with Nussstücken or pressurized and fumigated fat creams with solid pieces that are promoted from a mass reservoir to an outlet nozzle to exit through the outlet nozzle comprising the steps of: opening a mass feed opening such that one of the

Mass reservoir coming mass supply line with a pump room

is connected, wherein at the same time the outlet nozzle by a

Nozzle closure device is closed and / or simultaneously

Mass outlet is closed, so that the mass exit line

is closed and direct mass leakage of the mass is prevented by the measuring reservoir through the outlet nozzle; Retracting a arranged in the pump chamber of the pump piston, so that a desired amount of the mass of a

Mass reservoir through the mass supply opening and their

Mass supply line is conveyed into the pump chamber; then closing the mass feed opening such that the mass reservoir and optionally the mass feed line is fluidly separated from the pump space;

subsequently or simultaneously optionally opening the mass exit opening, so that the mass exit line is connected to the pump space; subsequently or simultaneously moving the pump piston into the pump chamber, so that the

Pump volume is reduced and the mass is transported from the pump chamber through the mass exit opening and the mass exit line towards the outlet nozzle, wherein immediately before the mass exit through the outlet nozzle the

Exit nozzle and in particular the nozzle closure device is opened, so that an exit of the mass from the free end of the outlet nozzle takes place; After the desired amount of mass has been discharged: stopping the mass outlet from the

Outlet nozzle by closing the outlet nozzle through the nozzle closure device and stopping the pump piston.

Optionally, it is contemplated that just prior to closing the exit nozzles the pumping piston is stopped and then retracted to increase the pumping space volume and thereby retract a portion of the mass located in the mass exit conduit or in the exit nozzle to prevent dripping. The device according to the invention is particularly suitable for gassing and / or not fumigated pumpable masses for the food industry, in particular

Chocolate or fat creams with or without inclusions to promote and spend metered. The device according to the invention can be used "in-line" in a plant for the industrial production of food products, an example being the filling of hollow waffle dishes with a chocolate cream However, it can also be used as a stand-alone module, for example for metering a cream with pieces contained therein onto a conveyor or any destination The apparatus according to the invention is suitable for filling prefabricated containers such as waffle dishes or for applying a mass in a punctiform or linear manner For example, the device according to the invention is suitable for delivering masses by free-dressing to a moving transport surface such as a belt or to stationary destinations such as a plate

Food products by applying the cream is the inventive

Device suitable.

All of these applications assume that the device according to the invention can deliver an exact quantity in a predetermined form at a dosing destination.

Fluctuations in the shape or quantity reduce the efficiency of the product

Manufacturing process and are therefore to be avoided.

The basic principle for conveying the mass corresponds to a piston pump, which sucks a mass from a mass reservoir or is fed under pressure in particular by a collector and pumps to the dosing destination. In particular, for the promotion of gassed masses, a seal of the entire pump chamber and the supply and the discharge lines is provided. Optionally, additional attachment components such as additional rotary pumps, vibrating tables, rotating nozzles, etc. may be provided. The machine is particularly suitable for the formation of one-shot products. Further, the apparatus is adapted to convey and dispense bulk commodities such as nuts, hazelnut pieces, peanuts, frozen pieces, granules, brittle etc. or other substantially hard to brittle bodies. For example, pieces with a size of 1 mm to 12 mm can be conveyed and dispensed. The general cargo or the solid inclusions can in all

Embodiments, for example, be a granule that is added to the mass.

The device according to the invention is adapted to convey and output pressurized masses of up to 8 bar from a collector system. The

Outlet nozzles are preferably designed to be closed. If necessary, the

Device relate the mass of a standing reservoir or a standing reservoir. The entire construction, and preferably those parts that come in contact with the mass, may be formed of stainless steel. Optionally, servomotors are provided for driving the moving parts. Optionally, a detection unit is provided, which monitors the shape and

possibly also the amount of output mass can detect.

For example, optical recording devices such as cameras, etc. can be used. By an evaluation unit, such as in particular a computer with a suitable software, the production process can be changed or stopped in a deviation from the defined specifications.

Furthermore, the device according to the invention optionally comprises an interface for connection to an industrial production plant for food products. This includes a mechanical interface for connecting the machine frame and / or a control interface for synchronizing the control of the device according to the invention with the control of a plant for the production of food products.

Furthermore, optionally, a temperature control device may be provided, with which the pump unit, in particular the pump space and / or the pump piston, the

Mass reservoir or the lines tempered, in particular cooled or can be heated. The outlet nozzles or the lines leading to the outlet nozzles can also be tempered. Especially for the processing of For temperature sensitive masses such as ice creams or fumigated chocolate creams, refrigeration can improve the quality of the formed product.

Furthermore, a control interface can also be provided, which is set up to control an external mass feed. Especially for continuous

In masses manufactured this interface can be used to control the throughput of mass production.

The device according to the invention preferably comprises a plurality of outlet nozzles, so that a plurality of products or a plurality of dosing destinations can be provided by the device according to the invention with the mass at the same time. For example, a single, or 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 may be 1 or more, more preferably up to 300

Be provided outlet nozzles. Preferably, a pump piston and a pump chamber are provided per outlet nozzle. The pump pistons can have a diameter of 4mm to 50mm in cylindrical design, for example. In particular, per pump piston or per pump chamber, for example, 0.1 g to 160 g / piston stroke can be promoted. Optionally, the pump volume can be changed by replacing the pump piston. The pumping plungers can, for example, carry out up to 40 or 50 pump strokes per minute, wherein the throughput can be extended, in particular, by the drives used.

An example application of the device according to the invention can be carried out as follows:

A mass is under a pressure of for example 1 to 8 bar over a

Feed line passed to the device according to the invention. The supply line is formed, for example, as a manifold and is optionally arranged above the pump chambers. In the case of pressurized masses, the supply line is preferably pressurized in all phases and positions of the process. To promote mass, the piston is retracted in the pumping space to increase the pumping space volume. As a result, the mass is sucked from the supply line and in particular from the mass feed opening or introduced under pressure. When the pumping space is filled, the closure device is activated and the

Mass supply opening is closed. The connection to the outlet nozzle is in further Sequence open, with the outlet nozzle itself during the previous

Procedural steps is kept closed. In a next step, the pump piston is retracted into the pump chamber to reduce the pump chamber volume. Since the mass feed opening is closed, the mass in the pump chamber is conveyed in the direction of the outlet nozzle. At this moment opens the outlet nozzle, whereby a discharge of the mass can take place. The speed, the time of the opening of the outlet nozzle and / or the size of the opening are controlled by the device according to the invention. This can be done a pressure regulation of the mass, dripping from the outlet line can be prevented and / or the throughput can be changed.

Shortly before the front dead center of the piston, stops at the promotion of the cream from the pump chamber, the outlet nozzles are closed. This causes a pressure drop to be prevented.

In order to ensure a reliable closing of the outlet nozzle, the outlet nozzle has a flexible tubular nozzle line, in the middle of which a nozzle channel is arranged, through which the mass can be pumped and which emerges at the free end of the nozzle line. The flexible tubular nozzle line can be deformed by a shut-off element and preferably by a counter-holder such that even with masses provided with a reliable mass

Lock control is enabled. For this purpose, the nozzle line through a

Shut-off, which is pressed to the outside of the nozzle line, elastically deformed. As a result, the guided within the nozzle line also deformed

Nozzle channel. In the closed position, this preferably has an im

Essentially wedge-shaped form. Solid bodies, such as nut pieces, which are located at the closure site, are conveyed by the wedge-shaped shape either back into the conduit or to the outside. The wedge-shaped design prevents nut pieces can block a closing of the nozzle line. In the present invention, solid bodies are transported away from the region of the closure site by the closing motion of the special design of the nozzle line and the nozzle channel. Subsequently, the invention will be further described by means of concrete embodiments.

Fig. 1 shows a schematic overall view of an embodiment of the

Device according to the invention.

Figures 2a to 2d show a schematic sectional view of a detail of the device according to the invention in different positions.

Fig. 3 shows a schematic sectional view of a detail of the invention

Contraption.

FIGS. 4a and 4b show a schematic sectional view of an outlet nozzle of the device according to the invention.

1 shows a device according to the invention with a machine frame 24, which is preferably designed as a floor-standing machine frame 24. By doing

Machine frame, preferably in a sealed area of the machine frame 24, the pumping assemblies 26 are provided. The pump assemblies 26 are suitable and / or set up, the mass of one here only schematically

illustrated mass reservoir 5 via mass supply lines 6 and

Mass outlet 8 to promote a dosing 27. The mass reservoir may be branched. For example, a manifold is provided, which extends from a container to a distribution line, from which pro

Pumping a separate mass supply line 6 opens into each or the pump chamber. In the present embodiment, a plurality of outlet nozzles 7

intended. In particular, ten outlet nozzles 7 are shown in this embodiment. In the background, further nozzles can be provided. For example, another twelve rows of ten nozzles may be provided, resulting in a total of 120 nozzles. The number is structurally expandable or reducible.

Furthermore, the device according to the invention comprises a control unit 25. This control unit is set up and / or suitable for carrying out the control of the device according to the invention. If applicable, this concerns the

Control of the drives, in particular the drives of the pump pistons, the servo drives and other moving components. Furthermore, the control unit is to set up and / or suitable to process sensor data such as in particular data from optical recording devices, temperature recording, etc. and, if appropriate, to modify the control as a function of this sensor data. Furthermore, the

Control unit suitable and / or set up, a coupling with another device such as the mass feed or a

Make baking machine.

The metering location 27 is a fixed area such as a plate or an intermediate product of a food product. Optionally, the dosing is a moving object such as a moving edible baking body.

Optionally, the dosing is an intermittently moving body, which can be stopped, for example, to order a mass such as a cream. For example, waffle bowls can be promoted to the dosing, stopped there for the introduction of a cream and are subsequently promoted for further processing.

Optionally, a conveyor belt such as in particular a belt or belt conveyor is provided in the region of the dosing.

In the present embodiment of Fig. 1, ten outlet nozzles 7 are shown. In the illustration of FIG. 1, two pump assemblies 26 are shown, wherein a left side and a right side of the region of the outlet nozzles 7 is arranged. If necessary, are behind it, in the present illustration behind the visible pump assemblies 26, further pumping arrangements with more

Outlet nozzles 7 arranged. By arranging a plurality of such

Pumping arrangements 26, the number of outlet nozzles 7 can be substantially expanded or reduced as desired. Depending on the maximum throughput of the

Manifold it may be necessary to provide multiple manifolds or multiple mass reservoirs. Optionally, in all embodiments, the mass reservoir can also be designed as devices for the continuous production of masses, in which no container must be provided for storing the mass. For the metered output of the masses 1 from the outlet nozzles 7, the mass is pumped from the mass supply line coming through the outlet nozzle 7 and metered output.

Fig. 2 shows parts of the pumping assembly 26 in different positions. The

The device comprises a pump chamber 2 with a mass feed opening 3, a mass outlet opening 4 and a mass reservoir 5, which in this case contains a manifold or a manifold. Furthermore, the device comprises an outlet nozzle 7, which through a mass outlet line 8 with the pump chamber. 2

connected is. In the pump chamber 2, the pump piston 9 is provided. By moving the pump piston 9, the pump chamber volume can be increased and decreased. Furthermore, a closure device 10 is provided. The closure device 10 comprises a closure slide 23. About this closure slide 23 or over the

Closure device 10, the mass feed opening 3 and / or the

Mass outlet 4 are closed and opened. Furthermore, in the present embodiment, an outlet nozzle 7 is provided per pump piston 9. The outlet nozzle 7 comprises a flexible, tubular nozzle line 11. Within the nozzle line 1 1, a nozzle channel 13 is provided, which at the free end of

Nozzle line 12 exits from this. Through the nozzle channel 13, the mass 1 can be pumped and output at the free end 12.

The closure slide is formed in the present embodiment as a hollow cylinder, in which the pump piston 9 is mounted and arranged to be movable. The pump piston 9 is preferably mounted linearly movable in the closure slide 23. The shutter slide 23 itself is also mounted in or along the direction of movement of the pump piston. The storage takes place in the pump chamber 2. The pump chamber 2 has appropriate internal dimensions, so that the shutter slide 23 is mounted substantially sealing in the pump chamber. The shutter slide 23 has matching

Internal dimensions, so that the pump piston 9 is mounted substantially sealingly therein. Together by the two components pump piston 9 and

Shutter 23 of the pump chamber 2 partially sealed and limited. The

Mass feed opening 3 and the mass exit opening 4 are along the

Direction of movement of the pump piston arranged in succession. Furthermore, the mass supply line and the mass exit line open substantially transversely or normal to the direction of movement of the pump piston in the pump chamber. As a result, the closure device 10 and in particular the closure slide in a

Moving along the direction of movement in a first position the

Mass supply opening 3 and the mass exit opening 4 open. This first position is shown for example in Fig. 2a. The closure slide 23 is pulled so far from the pump chamber 2, so that both the mass feed opening 3 and the mass exit opening 4 are open and the mass supply line 6 and the mass exit line 8 open into the pump chamber 2 and are connected thereto. In this position, therefore, the mass reservoir 5 on the

Mass supply line 6, the pump chamber 2 and the mass exit line 8 is connected directly to the outlet nozzle 7. In order to prevent escape of the mass in this position, a shut-off element 15 is preferably provided (not shown), which allows a closure of the nozzle channel and the outlet nozzle 7.

In Fig. 2b, another position is shown. The shutter slide 23 remains in its first position, in which the mass supply line 6 and the

Mass exit line 8 are connected to the pump chamber 2. By retracting the pump piston 9, mass 1 is drawn in from the mass reservoir 5 into the pump chamber 2. Preferably, the exit nozzle 7 is closed during this process step.

Fig. 2c shows the devices, in particular the closure slide 23 in a second position. The shutter slide 23 is now brought from a retracted position of the first position to a second position in which the

Lock slide 23 so protrudes into the pump chamber 2, that the

Mass supply opening 3 is closed. However, the mass exit opening 4 is open, so that the mass exit line 8 is connected to the pump space 2. The mass supply line 6, however, is not connected to the pump chamber 2.

At the same time or after closing, the pump piston 9 is also moved further into the pump chamber 2, so that the pump chamber volume is reduced. At the same time or just offset the outlet nozzle 7 is opened. As a result, the mass 1 is conveyed out of the pump chamber 2 by movement of the pump piston 9 out of the outlet nozzle 7 to the metering location 27. FIG. 2d shows a further, third position of the closure slide 23. In these, the closure slide projects so far into the pump space 2 that both the

Mass supply opening 3 and the mass exit opening 4 of the

Lock slide 23 are closed. As a result, a further conveying of the mass 1 is prevented by the pump piston 9 from the pump chamber 2.

Optionally, a retraction mode is provided, in which the piston is briefly withdrawn after the completed pumping operation with the discharge nozzle 7 open, in order to withdraw mass residues 1 which are located in the discharge nozzle 7. As a result, dripping of the mass 1 can be prevented. Furthermore, the dripping can also be prevented by the outlet nozzle 7 being closed.

Subsequent to the position of FIG. 2d, both the pump piston 9 and the closure slide 23 are retracted again and in particular brought into a position according to FIG. 2a in order to repeat the pumping process.

Fig. 3 shows a schematic representation of the outlet nozzle 7 and adjacent components. The mass 1 is coming from the pump chamber 2, not shown, through the mass exit opening 4 and the mass exit line 8 direction

Outlet nozzle 7 promoted. The outlet nozzle 7 comprises a nozzle line 1 1, at the free end of a central nozzle channel 13 exits. The nozzle line 1 1 is preferably flexible and / or tubular. For closing the outlet nozzle 7, a nozzle closure device 14 is provided. The nozzle closure device 14 comprises a shut-off element 15. This is pressed in the region of a closure point 17 to the outside 16 of the nozzle line 1 1 in order to close the nozzle channel 13. Further, the nozzle closure device optionally comprises a counter-holder 18. The nozzle line 1 1 is arranged between the counter-holder 18 and the shut-off element 14. By relative movement of the shut-off element 15 to the counter-holder 18, the nozzle line 1 1 is clamped between these two elements and

optionally compressed. By elastic deformation closes the nozzle channel 13. This allows the outlet nozzle 7 are closed. Preferably, the closure point 17 in the region of the free end 12 of the nozzle line

1 1 provided. Optionally, the closure point 17 is provided away from the free end 12 of the nozzle line 1 1. The shut-off element 15 is with a Absperrgrundkörper 20 connected. The counterpart is with one

Counterholder body 21 rigidly connected. By relative movement of the

Absperrgrundkörpers 20 against the backstop body 21 is thereby the shut-off element 15 moves relative to the anvil 18. During the

Contra-base body 21 is preferably rigidly connected to the machine frame, in a preferred embodiment, the shut-off base 20 is designed to be movable and drivable. In particular, a shut-off drive 22 is provided. This can cause a linear movement of the Absperrgrundkörpers 20 in particular via a transmission, for example, via a crank mechanism. Preferably, the

Absperrantrieb 22 connected to the control unit 25 and in particular controlled by this control unit 25 and / or regulated.

FIG. 4a shows the outlet nozzle 7 or the nozzle closure device 14 in an open position. The nozzle line 1 1 is arranged between the shut-off element 15 and the counter-holder 18. In the illustrated open position, the nozzle channel 13 extends substantially rectilinearly through the nozzle line 1 1 and exits at the free end 12 of the nozzle line 1 1 from this. The shut-off element 15 preferably has a shut-off extension 19. This Absperrfortsatz 19 protrudes from the shut-off element 15 towards the nozzle line 1 first By the Absperrfortsatz 19, the closure point 17 is defined. Also, the counter-holder preferably comprises an extension, which is arranged analogously to the Absperrfortsatz 19 such that it protrudes toward the nozzle line 1 1.

Preferably, both extensions are provided in the region of the closure point 17.

Fig. 4b shows the same arrangement as Fig. 4a, but in the closed position. The Absperrgrundkörper 20 is moved relative to the position of Fig. 4a, so that the nozzle line 1 1 is clamped elastically deformed between the Absperrfortsatz 19 and the shut-off element 15 and the counter-holder 18. The nozzle channel 13 has a wedge shape in this position. In particular, the nozzle channel 13 is narrowed asymptotically or extending along the course of the nozzle line 1 1 toward the closure point 17. Starting from the closure point 17 thus results in a wedge-shaped in cross-section shape of the nozzle channel 13. If necessary, the

Closure 17 away from the free end 12 of the nozzle line 1 1 arranged.

This results optionally in a double wedge shape, wherein the cross-section wedge-shaped nozzle channel extends from the closure point 17 on both sides along the nozzle line.

By this wedge-shaped configuration of the nozzle channel is prevented when closing the nozzle channel that solid body such as nut pieces or similar solid, hard or brittle body prevent closing of the outlet nozzle. By the present inventive embodiment of the nozzle closure device 14 are solid body such as cargo, nuts, etc. through the

Shut-off movement and the wedge-shaped cross-sectional shape of the nozzle channel, which forms continuously during closing of the nozzle closure device 14, is transported away from the region of the closure point 17. This is a reliable one

Closure of the outlet nozzle 7 given.

In all embodiments, it is possible to provide a plurality of outlet nozzles per pump chamber and per pump cylinder.

In all embodiments, multiple mass exit channels may be merged to simultaneously output different masses through one or more nozzles. For example, two masses coming from two

different mass reservoirs are pumped through pump chambers and a pump piston, can be output together through a single outlet nozzle.

Optionally, the closure slide has a plurality of openings. By providing individual spaced-apart openings can more

Control options for opening and closing the

Mass supply opening and / or the mass exit opening may be provided.

For example, in all embodiments, the openings in

Shutter slide be designed slot-shaped. By moving the closure slide, in particular along the direction of movement of the piston or by rotating the closure slide about the central axis, which is preferably arranged parallel to the direction of movement of the pump piston, thereby the two openings (mass supply opening and mass exit opening) can be opened or closed separately. For example, only one of Both openings may be open or closed. Optionally, both can be closed or both open.

Optionally, the mass reservoir, in particular its supply line, and the pump chamber are pressurized in any position and at any time during operation. The pressure corresponds, for example, 1 to 8 bar. In particular, the pressure of the pumping chamber is preferably equal to the pressure of the mass reservoir, so that there are no or only slight pressure fluctuations.

Optionally, the mass through the mass supply line through

Retraction of the piston sucked. Optionally, the mass is through the

Overpressure in the mass reservoir pressed into the pumping chamber. Optionally, the mass is reduced by retracting the piston and pressing the

Mass reservoirs pumped into the pump room.

An exemplary method according to the invention comprises the following steps:

Move the shutter to a position so that the

Mass supply opening is open and the mass exit opening is closed. Retracting the pump piston, so that the mass from the mass reservoir and in particular through the mass supply opening and the mass supply line is conveyed into the pump chamber. Subsequently, the shutter is moved, so that the mass supply opening is closed and the

Mass supply line is separated from the pump room. At the same time or offset in time, the pump piston is moved. Subsequently or simultaneously the

Mass exit line connected to the pump room. In particular, the mass exit opening is opened by moving the closure slide.

At the same time or after that, the pump piston is moved into the pump chamber in order to reduce the pump chamber volume. As a result, the mass is conveyed out of the pump chamber through the mass exit opening and the mass outlet line in the direction of the outlet nozzle. Simultaneously or thereafter, the exit nozzle is opened to allow the mass to escape from the free end thereof. Shortly before the exit of the mass, the nozzle closure device is actuated to open the outlet nozzle. During the suction of the mass into the pump chamber, the outlet nozzle is preferably closed. To stop the mass exit from the outlet nozzle, the outlet nozzle is closed again by the nozzle closure device. Subsequently, the

Lock slide brought back into the starting position, in which the

Mass exit opening is closed and the mass supply opening is open. At the same time or after, the piston is again withdrawn to the

To increase pump volume and to move the mass from the mass reservoir into the pump room.

Optionally, the method according to the invention comprises the following steps:

In a first basic position, all outlet nozzles are closed. When starting the method according to the invention, the shutter slides are brought into a position in which the mass supply openings are opened. In this position, the outlet nozzles through the nozzle closure device or the

Mass outlet openings closed by the closure device. This prevents that the mass exits directly from the mass reservoir through the pump chamber automatically through the outlet nozzles and a pressure drop occurs.

The shutter has reached the position in which the

Mass supply opening is opened, the pump piston is withdrawn to fill the pump chamber with the mass. The movement of the pump piston may either be driven by a servomotor or be assisted by the pressure in the mass reservoir. Preferably, the movement of the pump piston is driven by controlled or controlled servomotors. In particular, the volume of the sucked mass is regulated. At this time, the outlet nozzles are closed.

Thereafter, the closure slide and the pump piston preferably move uniformly in the pump chamber, so that the mass exit opening is opened, the mass supply opening is closed, and the pump piston can convey the mass through the mass exit opening in the direction of the exit nozzle. At this time, the outlet nozzles are still closed.

In a next step, the outlet nozzles are opened. At this time, the metered output of the mass through the exit nozzles starts to a dosing destination. To open and close the outlet nozzles, as described above, a

Shut-off to the outside of a flexible and / or tubular

Nozzle line moved to close or open by elastic deformation provided in the nozzle line nozzle channel. This movement can be controlled or regulated. In particular, a servo drive is provided which moves the shut-off or the shut-off. In particular, the size of the opening, the duration of the opening, the duration of the closing operation and other parameters can be changed by the controller and / or the control. Optionally, a further method step is provided, in which shortly before closing the

Outlet nozzles of the piston is withdrawn. In this case, the mass exit opening or the mass exit line is at least partially open in the direction of the pumping space.

As a result, a part of the mass which is located in the mass outlet duct or in the outlet nozzle, withdrawn. This prevents dripping of the mass.

For example, ³ cm no retreat mode in compositions having a density of 0.35 g / cm ³ to about 0.8 g / provided. Above about 0.8 g / cm ³ , a retraction mode is preferably employed.

Optionally, the mass feed opening and the mass exit opening are spaced apart from one another along the direction of movement of the pump piston

arranged. In addition, the closure slide, which is designed, for example, as a hollow cylinder, is preferably provided with a passage opening which enters on one side of the closure slide and exits on the other side of the closure slide. As a result, two exemptions are formed in the outer wall of the closure slide. If the opening of the closure slide is brought together with the mass feed opening, so that they come to lie substantially overlapping or congruent, then a pumping of the mass from the mass supply line is made possible in the pump chamber. If the closure slide is displaced so that the opening is substantially overlapping or congruent with the mass exit opening, pumping of the mass from the pump space through the mass exit opening into the mass exit line is made possible. Is this opening of the closure slide neither with the mass feed opening nor with the mass exit opening in an overlapping or congruent Position, so both openings are closed and it is no promotion of the mass possible.

Optionally, several outlet nozzles are provided per pump chamber and per pump piston. These are fed by a bus, for example. The collecting line is connected to the mass outlet opening and the mass outlet line of the pump chamber, so that the mass can be conveyed through a plurality of outlet nozzles by means of a pump stroke. Optionally, several such

Pump assemblies provided with a plurality of outlet nozzles, so

at the same time a large number of mass outlet nozzles can be flowed through by a mass.

Optionally, different masses are conveyed in different pumping arrangements.

The device according to the invention and the method according to the invention are particularly suitable for delivering a pumpable mass which may be under elevated pressure and which is admixed, for example, with inclusions such as piece goods, nut splinters, metered at constant pressure and metered out through one or more outlet nozzles. In this case, a throughput of, for example, up to 50 strokes / minute per pump piston is made possible.

Particularly in the case of gassed masses and temperature-sensitive masses, it is of great importance for the quality of the food product to be formed that both the pressure and the temperature of the mass are kept substantially constant. Greater pressure fluctuations cause fumigated masses to change their consistency and in particular segregation of the gas phase and the cream occurs. The same applies to temperature fluctuations in which the

Consistency of the mass can change. For this reason, the device according to the invention preferably has a temperature control device, through which those parts can be actively cooled or heated, with which the mass is in direct contact. For this purpose, for example, double-walled housing, double-walled lines or medium lines can be provided, in which

Heat exchanger assemblies such as cooling or heat pipes are provided. By controlling and the temperature of the media flowing through the medium, the cooling capacity or in the case of heat pipes, the heat output can be controlled.

Optionally, in all embodiments, the outlet nozzles along the

Gravity directed downwards. Optionally, however, the outlet nozzles can also be directed obliquely downwards. Optionally, in all embodiments of the Absperrgrundkörper is designed as a substantially horizontally extending plate or as a horizontally extending carrier. In particular, a shut-off body is rigidly connected to a plurality of shut-off elements, so that by a drive substantially more horizontal movement of Absperrgrundkörpers

Shut-off can be moved and thereby several outlet nozzles can be closed.

Optionally, this shut-off movement can be regulated or controlled in all embodiments. For closing the nozzle channel, as already described, the nozzle line is compressed by the nozzle closure device. At the

Compressing the nozzle channel is of a substantially round

Cross-section first compressed to an oval cross-section. This reduces the area of the free cross section of the nozzle channel. By further

Compressing the nozzle line, the cross-section of the nozzle channel is reduced to a narrow gap. If this narrow gap is further compressed, the nozzle channel is closed at the closure point. In this position, the nozzle channel in a plane that follows the extension direction of the nozzle channel and in particular runs normal to the flow cross-section of the nozzle channel, a wedge-shaped shape. This wedge shape forms continuously when the

Nozzle channel is compressed from a substantially round shape over an oval shape to a gap shape. As a result of this movement, inclusions, in particular solid bodies, are conveyed out of the area of the closure.

Optionally, the closing of the outlet nozzles by movement of Absperrgrundkörpers happens jerky. This allows a faster closing of the

Outlet nozzles are effected. Preferably, the movement of the happens Shut-off elements or the Absperrfortsätze transversely or normal to the outlet direction of the mass, ie transverse to the course of the nozzle line.

In all embodiments, the counterholder base body and the shutoff base body preferably have clearances for the passage of the nozzle lines. The nozzle lines are guided by these bodies. The exemptions in these basic bodies can be oversized, causing a shift of the

Absperrgrundkörpers can be done with respect to the Gegenhaltergrundkörper without the nozzle line is sheared off. This excess of exemptions in the

Absperrgrundkörper and / or in the counter-holder body is by the

cantilevered Absperrfortsatz bridged, so that the Absperrgrundkörper can be moved relative to the Gegenhaltergrundkörper, but the clamping takes place at the closure point through the Absperrfortsatz and not by the exemptions in the Gegenhaltergrundkörper or Absperrgrundkörper.

Optionally, the invention relates to a device for the metered delivery of one or more pumpable and solid inclusions containing masses, such as in particular fatty creams with splinters of solids, chocolate creams with Nussstücken or pressurized and fumigated fat creams with solid pieces of a

Mass reservoir to one or more outlet nozzles are conveyed to exit through the outlet nozzles, wherein the outlet nozzle has a flexible hose-shaped nozzle line and disposed within the nozzle line and exiting at the free end of the nozzle line nozzle channel, wherein a

Nozzle closure device is provided which has a movable transversely to the course of the nozzle channel shut-off, wherein the shut-off a

Closing position in which the shut-off is pressed to the outside of the flexible nozzle line, thereby deforming the flexible nozzle line and the nozzle channel is closed at a closure point, and / or wherein in the

Closure position of the nozzle channel in the longitudinal cross-sectional plane one of the

Closure has outgoing wedge shape. Further features of the outlet nozzle will become apparent from the claims and the description and the drawings.

Optionally, the device may include a closure device having a first position in which the mass supply port and the mass exit port open to the pump room. Optionally, the device may be a

Closure device comprising a second position in which the

Mass supply opening closed by the closure device and the mass exit opening is opened to the pumping chamber. Optionally, the device may comprise a closure device having a third position in which the mass supply opening and the mass exit opening of the

Closure device are closed. Optionally, the device may comprise a closure device, wherein a position is provided in which the mass exit line is closed and the mass supply opening is open to the pump chamber.

LIST OF REFERENCE NUMBERS

1 mass

2 pump room

3 mass feed opening

4 mass exit opening

5 mass reservoir

6 mass supply line

7 outlet nozzle

8 mass exit line

9 pump pistons

10 closure device

1 1 nozzle line

12 Free end of the nozzle line

13 nozzle channel

14 Nozzle closure

15 shut-off element

16 outside of the flexible nozzle line

17 closure point

18 counterholds

19 barrier extension

20 Absperrgrundkörper

21 counterholder body

22 shut-off drive

23 shutters

24 machine frame

25 control unit

26 pumping arrangement

27 dosing location

Claims

claims

1 . Device for the metered delivery of one or more pumpable and solid inclusions containing masses (1), in particular fatty creams with solid chips, chocolate creams with Nussstücken or pressurized and fumigated fat creams with solid pieces of a

Mass reservoir to one or more outlet nozzle (s) is promoted or to emerge through the outlet nozzle (s), comprising:

- A pump chamber (2) with a mass feed opening (3) and a

Mass outlet opening (4),

a mass supply line (6) opening through the mass feed opening (3) into the pump space (2) and coming from a mass reservoir (5),

- a through the mass outlet opening (4) of the pump chamber (1) outgoing to an outlet nozzle (7) leading mass exit line (8),

- A pump piston (9) for changing the pump chamber volume, which is arranged linearly displaceable and the pump chamber (2) partially limited, characterized in that

the outlet nozzle (7) has a flexible, tubular nozzle line (11) and a nozzle channel arranged inside the nozzle line (11) and emerging at the free end (12) of the nozzle line (11),

a nozzle closure device (14) is provided which has a shut-off element (15) movable transversely to the course of the nozzle channel (13), in that the shut-off element (15) has a closure position in which the shut-off element (15) contacts the outside (16) of the shut-off element (15) flexible nozzle line (1 1) is pressed, whereby the flexible nozzle line (1 1) deformed and the nozzle channel (13) is closed at a closure point (17),

and that in the closed position of the nozzle channel (13) in the

Longitudinal cross-sectional plane has a wedge shape emanating from the closure point (17).

2. Device according to claim 1, characterized in that the

Shut-off (15) and the closure point (17) in the course of the nozzle line (1 1) away from the free end (12) of the nozzle line (1 1) is provided, and that in the closed position of the nozzle channel (13) in the

Longitudinal cross-sectional plane one on both sides of the closing point (17)

has outgoing double wedge shape.

3. Apparatus according to claim 1 or 2, characterized in that a

Counter holder (18) is provided that between the counter-holder (18) and the shut-off element (15), the nozzle line (1 1) is provided,

that in the closed position, the nozzle line (1 1) between the counter-holder (18) and the shut-off element (15) is clamped and elastically deformed, so that the nozzle channel (13) is closed,

and that an open position is provided in which the counter-holder (18) and the shut-off element (15) have a distance from one another which is greater than the distance of the counter-holder from the shut-off element in the closed position, so that in the open position the nozzle channel (13) at least partially, preferably completely open.

4. Device according to one of claims 1 to 3, characterized in that the shut-off element (15) and / or the counter-holder (18) comprises a cam-shaped, wedge-shaped or finger-shaped Absperrfortsatz (1 9), in the region of the closure point (17) direction The nozzle line (1 1) protruding outwards.

5. Device according to one of claims 1 to 4, characterized in that the shut-off element (15) is provided on a Absperrgrundkörper (20), that the counter-holder (18) is provided on a Gegenhaltergrundkörper (21), and that a shut-off drive (22 ) is provided, which causes a relative movement between the Absperrgrundkörper (20) and the Gegenhaltergrundkörper (21) and / or between the shut-off (15) and the counter-holder (18), so that by controlling and / or regulating the shut-off

Exit nozzle (7) and in particular the nozzle channel of the nozzle line (1 1) closable and is apparent.

6. Device according to one of claims 1 to 5, characterized in that the shut-off drive (22) is a linear drive, which causes a linear displacement of the shut-off relative to the anvil (18).

7. Device according to one of claims 1 to 6, characterized in that a plurality of outlet nozzles (7) are provided, each having a nozzle line (1 1) and a shut-off element (15) for closing the nozzle channel (13) of the respective nozzle line (1 ) exhibit.

8. Device according to one of claims 1 to 7, characterized in that a plurality of shut-off elements (15) are arranged on a single Absperrgrundkörper (20), so by moving a Absperrgrundkörpers (20) a plurality of shut-off elements (15) movable and thereby a plurality of nozzle lines (1 1) are closable.

9. Device according to one of claims 1 to 8, characterized in that a plurality of counter-holders (18) are arranged on a single Gegenhaltergrundkörper (21), wherein the Gegenhaltergrundkörper (21) is arranged to be movable or stationary in order to move during a relative movement of the Absperrgrundkörpers (20 ) to effect a closure of the outlet nozzle (7).

10. Device according to one of claims 1 to 9 comprising a

Closure device (10) having a first position in which the

Mass supply opening (3) and the mass exit opening (4) for

Pump chamber (2) are open.

1 1. Device according to one of claims 1 to 10 comprising a

Closure device (10) having a second position in which the

Mass supply opening (3) of the closure device (10) closed and the mass outlet opening (4) to the pump chamber (2) is opened.

12. Device according to one of claims 1 to 1 1 comprising a

Closure device (10) having a third position in which the

Mass supply opening (3) and the mass exit opening (4) of the closure device (10) are closed.

13. Device according to one of claims 1 to 12 comprising a

Closure device (10), wherein a position is provided, in which the

Mass outlet line (8) is closed and the mass supply opening (3) is open to the pump chamber (2).

14. Device according to one of claims 1 to 13, characterized in that per outlet nozzle (7) has a pump chamber (2) with a mass supply opening (3) and a mass outlet opening (4), one through the mass supply opening

(3) in the pump chamber (2) opening and coming from a mass reservoir (5) mass supply line (6), one through the mass exit opening

(4) from the pump chamber (2) outgoing to the respective outlet nozzle (7) leading mass exit line (8), a pump piston (9) and a closure device (10) are provided, wherein the pump piston (9) and the

Closing devices (10) of a plurality of outlet nozzles (7) can be controlled, regulated and / or moved together,

or that for a plurality of outlet nozzles (7) a single pump chamber (2) with a mass supply opening (3) and a mass outlet opening (4), one through the mass feed opening (3) into the pump chamber (2) and from a mass reservoir (5) coming mass supply line (6), a through the mass outlet opening (4) of the pump chamber (2) outgoing to the respective outlet nozzle (7) leading mass outlet line (8), a pump piston (9) and a closure device (10) are provided, wherein the pump piston (9) and the closure devices (10) of a plurality of outlet nozzles (7) are jointly controllable, controllable and / or movable.

15. Device according to one of claims 1 to 14, characterized in that the pump piston (9) and the closure device (10)

- Having a time after the metered output of a mass (1), but temporally before the closure of the outlet nozzle (7) provided retraction mode in which the closure device (10) is in the second position in which the mass supply opening (3) of the Closure device (10)

closed and the mass exit opening (4) is open to the pump chamber (2), and in which the pump piston (9) to increase the pump chamber volume is in a return movement, so that in the free end (12) of Nozzle line (1 1) located mass (1) is retracted and by closing the nozzle line (1 1) through the shut-off element (15) and the associated reduction in the volume of the nozzle channel (13)

drip-free in the nozzle channel (13) remains.

16. Device according to one of claims 1 to 15, characterized in that the Absperrgrundkörper (20) as a horizontally extending and horizontally displaceable elongated body and / or as a plate-shaped body with

Passage openings for the nozzle lines (1 1) is executed.

17. Device according to one of claims 1 to 16, characterized in that the closure device along a closing direction

includes slidable closure slide (23),

- whose outer shape is adapted to the shape of the pump chamber, so that the

Mass feed opening and the mass exit opening can be closed by displacing the closure slide along the closing direction,

- And whose inner shape is adapted to the shape of the pump piston, so that the pump piston is arranged to be sealingly displaceable along the closure slide,

- And that the closure slide (23) and the pump piston together or separately along the closing direction relative to the pump chamber

are displaceable and drivable and together limit the pump room on one side and seal.

18. Device according to one of claims 1 to 17, characterized

- That the pump chamber arranged a normal to the closing direction

Having pump space cross-section,

- That the pump piston has a piston arranged perpendicular to the closing direction,

- That the closure slide is designed as a hollow body whose normal to the closing direction arranged free inner cross section corresponds to the piston cross section and whose normal to the closing direction arranged

External cross section corresponds to the pump chamber cross section, - And that the pump piston is sealingly mounted in the closure slide and the closure slide sealingly in the pump chamber.

19. Device according to one of claims 1 to 18, characterized in that the pump piston has a circular cross-section that the

Lock slide is designed as a hollow cylinder and that the pump chamber is cylindrical.

20. Method for metered delivery of pumpable and solid inclusions containing masses such as in particular fatty creams with solid splinters,

Chocolate creams with nut pieces or compressed and fumigated fatty creams containing solid pieces conveyed from a mass reservoir to an outlet nozzle to exit through the outlet nozzle, comprising the following steps:

a. Opening a mass feed opening so that one of the

Mass reservoir coming mass supply line with a

Pump room is connected,

b. at the same time the outlet nozzle by a

Nozzle closure device is closed and / or at the same time a mass exit opening is closed, so that the

Mass exit line is closed and direct mass leakage of the mass is prevented by the measuring reservoir through the outlet nozzle, c. Retracting a pump piston arranged in the pump chamber,

so that a desired amount of the mass is conveyed from a mass reservoir through the mass feed opening and its mass feed line into the pump space,

d. then closing the mass feed opening so that the

Mass reservoir and optionally the mass supply line is separated from the pumping space in terms of flow,

e. subsequently or simultaneously, if necessary, opening the

Mass outlet opening, so that the mass exit line is connected to the pump room,

f. subsequently or simultaneously moving the pumping plunger into the pumping space so that the pumping space volume is reduced and the mass from the pump room through the mass exit opening and the

Mass outlet line is transported towards the outlet nozzle,

G. wherein immediately before the mass exit through the outlet nozzle, the outlet nozzle and in particular the nozzle closure device is opened, so that an escape of the mass from the free end of the

Outlet nozzle takes place,

H. After leaving the desired amount of mass: stopping the

Mass exit from the outlet nozzle by closing the outlet nozzle through the nozzle closure device and stopping the

Pump piston.

A method according to claim 20, characterized in that shortly before closing the outlet nozzles of the pump piston stopped and then

is retracted to increase the pumping space volume and thereby a portion of the mass in the mass exit line or in the

Exit nozzle is to retract to prevent dripping.