Fluent material handling – with receiver or receiver coacting mea – Fluent charge impelled or fluid current conveyed into receiver
Patent
1997-02-13
1998-10-20
Jacyna, J. Casimer
Fluent material handling, with receiver or receiver coacting mea
Fluent charge impelled or fluid current conveyed into receiver
141 1, 141244, B67C 320
Patent
active
058232346
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on a process for filling containers with a pressurized liquid, according to the preamble to claim 1. JP 10 46 392 B4 has already disclosed a process of this kind. In this process, the liquid pressure is measured once after the opening of a filling valve, whereupon a control device calculates a filling time or opening time for the filling valve for a particular fill quantity based on the liquid pressure measured. In the known process, it is disadvantageous that pressure fluctuations occurring during the filling process, which lead to a change in the through flow quantity at the filling valve, are not taken into account. Furthermore, the fill quantities during the opening and closing process of the filling valve are also not taken into account. The precision of the known filling process is therefore limited.
ADVANTAGES OF THE INVENTION
The process according to the invention for filling containers with a pressurized liquid, has the advantage over the prior art that it functions in a very precise manner. This is achieved according to the invention by virtue of the fact that the liquid pressure is continuously measured during the filling process so that pressure fluctuations that occur can be taken into account. Furthermore, the through flow quantities during the opening and closing process of the filling valve can also be detected, and can be taken into account in the calculation of filling volumes.
Further advantages and advantageous improvements of the process according to the invention for filling containers with pressurized liquid are set forth in the following description.
BRIEF DESCRIPTION OF THE DRAWING
An exemplary embodiment of the invention is shown in the drawing and described in detail in the ensuing description. The sole FIGURE shows a schematic representation of a filling machine.
DESCRIPTION OF THE EXEMPLARY EMBODIMENT
The filling machine shown in FIG. 1 for metering and filling a liquid into packaging containers 10 has a feed device 11 with which packaging containers 10, for example ampules or vials, are supplied to treatment stations disposed in succession. The feed device 11 has a spiral conveyor 12 for the cyclical or continuous transport of packaging containers 10. The packaging containers 10 stand and slide on sections of track 13 to 15. A weighing device 17, 18 for each respective packaging container 10, which device can be controlled via a discharge device 16, is disposed between the respective sections of track 13 and 14 or 14 and 15, of which weighing devices, the one weighing device 17 detects the tare weight G1 and the other weighing device 18 detects the gross weight G2 of the packaging container 10 and sends it to a control device 19 as an input quantity.
For example, product specific data such as the viscosity progression of the liquid over temperature as well as data of the device are stored in the control device 19. An input/output unit 20 is connected to the control device 19, via which unit in particular the desired fill quantity M or a desired fill weight of the packaging container 10 can be input into the control device 19.
A filling device 22 is disposed above the feed device 11 in the region of track section 14. In a cyclical transport of packaging containers 10, the filling device 22 includes a number of filling heads 23 that corresponds to the number of packaging containers 10 to be filled per cycle, for example six, each of the filling heads has a hollow filling needle 24 that can be raised and lowered. Each filling head 23 is coupled with a metering valve 25 for the liquid, wherein all of the metering valves 25 can be synchronously controlled in common by the control device 19. The metering valves 25 communicate via short lines 26 with a common, tubular distributor 30 in which a liquid pressure P1 prevails. For its part, the distributor 30 is connected to a reservoir 35 for the liquid via a line 33 and a quick catch device 34. The pressure difference between the distributor 30, which is completely filled with the liquid, and t
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Greigg Edwin E.
Greigg Ronald E.
Jacyna J. Casimer
Robert & Bosch GmbH
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