Fluent material handling – with receiver or receiver coacting mea – With means to move supply means and/or receiver to – from or... – Receiver lift or lower for filling
Patent
1997-09-26
1999-07-13
Jacyna, J. Casimer
Fluent material handling, with receiver or receiver coacting mea
With means to move supply means and/or receiver to, from or...
Receiver lift or lower for filling
141192, 141263, B65B 322
Patent
active
059212934
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device and a process for filling containers with a liquid, in particular folded carton packings closed off at one end, comprising at least one transport device for moving the container, a storage container for holding the liquid and at least one filling head connected to the storage container and able to be closed off by a filling valve; the said filling head being vertically movable in relation to the container and being able to be lowered into this container.
Many designs of fast filling machines for filling milk, juice or similarly foaming products are known. In order to avoid a defoaming aggregate in these machines which even without it are quire complex from a design point of view, it is well known for the filling head to be movable in relation of the container in order--at the beginning of, and during, the filling process--to have as small a distance as possible between the filling head and the bottom of the container or the liquid level so as to avoid foaming.
The relative movement between container and filling head either takes place by raising and lowering the container or else by lowering and raising the filling head. In addition, a combination of both variants is possible, even though this makes little sense from a design point of view.
From CH-A-681 291 a device for filling liquids is known in which the filling head is always to be submerged evenly in the liquid. Control of this filling device is quite cumbersome because height measuring takes place by weight measuring cells. To this effect, the signals from the weight measuring cells have to be processed into weight information by an evaluation circuit. The weight information has to be processed in a computer for dose rate control to select the position of the filling valve in relation to the position of the container to be filled.
In order to minimise foaming, the task is to synchronise the mechanical movement of the container or the filling head with the filling level, because for reasons of hygiene the filling head should not be immersed in the liquid already held in the container. This task has already been solved in prior art by synchronising the lifting movement with the movement of a dose rate piston. In the case of older filling machines, synchronisation is by means of cam control; in the case of more modern machine designs, the movements of the container or of the filling head respectively, are carried out by electric servo motors, and movement synchronisation is realised by program control. Such a synchronisation of two movements is technically demanding and in addition, the use of a dose rate piston is expensive and susceptible to wear and malfunction.
SUMMARY OF THE INVENTION
From this starting point it is the object of the present invention to design and further develop the device for filling containers with a liquid or the respective process for this, as mentioned and described in more detail above, to the point where reliable control of the relative movement between container and filling head can be achieved by a simple design, and in this way significantly reduce foaming of the fill product in order to avoid subsequent defoaming.
In a device according to the precharacterizing part of claim 1 this object is met in that a flow meter is arranged between the storage container and the filling valve and in that a control device for converting the impulses of the flow meter into vertical movements of the filling head and/or the container is provided.
In regard to the process according to the invention, the object is met in that the relative movement between the container and the filling head is regulated on the basis of the volume of liquid flowing into the container; this volume being determined by a flow meter.
The device or the process according to the invention does not need the movement of a dose rate piston, because the dose rate flow for the container to be filled is measured by a flow meter and processed to a dose rate volume in a control device.
In a further embodimen
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Berger Jorg
Emmerich Rudiger
Jacyna J. Casimer
SIG Combibloc GmbH
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