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WO1999057013A1 - Procede et appareil servant a doser un produit liquide - Google Patents

Procede et appareil servant a doser un produit liquide Download PDF

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Publication number
WO1999057013A1
WO1999057013A1 PCT/IB1999/000792 IB9900792W WO9957013A1 WO 1999057013 A1 WO1999057013 A1 WO 1999057013A1 IB 9900792 W IB9900792 W IB 9900792W WO 9957013 A1 WO9957013 A1 WO 9957013A1
Authority
WO
WIPO (PCT)
Prior art keywords
dosing
dosing devices
duration
devices
fluid product
Prior art date
Application number
PCT/IB1999/000792
Other languages
English (en)
Inventor
Tore SØRBY
Original Assignee
Elopak Systems Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elopak Systems Ag filed Critical Elopak Systems Ag
Publication of WO1999057013A1 publication Critical patent/WO1999057013A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
    • B65B3/30—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement
    • B65B3/32—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement by pistons co-operating with measuring chambers

Definitions

  • EP-B-234102 discloses apparatus for filling liquid into containers comprising a filler body and a dosing device.
  • the device communicates with the interior of a rotary valve through an end cover of the valve housing, the valve including a valve seat and a check valve closure member spring-biased towards the seat.
  • the valve includes three rotary ports and two fixed ports. Downstream of one fixed port is an anti-drip, suck-back device of a piston-and- cylinder form whereof the stroke of the piston is adjustable. Upstream of the other fixed port is a throttling valve lowerable into an operative position downstream of inlet holes from a liquid-containing tank.
  • a high viscosity liquid For a high viscosity liquid, it is drawn into the device through the holes, that other fixed port and one of the rotary ports and the end cover, the valve is rotated to align another of the rotary ports with the one fixed port and to close the other fixed port, and the liquid is then expelled from the device through the end cover, that other rotary port and the one fixed port and an outlet nozzle.
  • a low viscosity liquid is drawn into the device through the holes, the lowered valve, the other fixed port and the one of the rotary ports and the end cover, and is then expelled from the device through the end cover, the valve, the third rotary port and the one fixed port and the nozzle.
  • FR-A-2342203 discloses a system for the filling of receptacles with liquid or paste-like product from two dosing devices operating out of phase.
  • the receptacles are advanced by means of a conveyor belt which indexes the receptacles in pairs to beneath the dosing devices.
  • the duration of the movement period of each indexing cycle is between one-sixth and one-third of the duration of the cycle
  • the duration of the delivery action of each dosing device is between one- sixth and one-third of the cycle duration
  • the duration of the intake action of each dosing device is no more than five-sixths of the cycle duration.
  • the delivery actions of the two dosing devices may overlap each other in time and each delivery action may occur during parts of two indexing cycles.
  • Each dosing device includes a non-return inlet valve at the entrance to its dosing chamber, and an outlet valve.
  • the dosing devices are supplied from a product- containing reservoir via a feed conduit containing a feed pump producing a practically constant flow rate of the product.
  • the feed conduit branches into two ducts of identical cross-section to each other and to the conduit and leading towards the respective dosing devices.
  • There is a slide valve which is common to both ducts and is such that the total throughflow cross-section of the valve is always equal to the throughflow cross-section of one of the two ducts .
  • DE-A-2415237 discloses a system in which two dosing devices operating out of phase with each other deliver from a common inlet to a common outlet a substance, such as margarine, which solidifies in a state of rest.
  • An indexing turntable brings receptacles in turn to beneath the common outlet.
  • the delivery period of each dosing device co-incides with the dwell period of the indexing cycle.
  • the intake duration of each dosing device is equal to the duration of an indexing cycle and the intake period extends over parts of two cycles.
  • Yoghurt is a high viscosity liquid; we are aware that, in the filling of yoghurt into cartons, cold filling at 3°C to 10°C is becoming the preferred method as it gives better taste/acidity owing to better control of the product temperature throughout the processing. This is particularly relevant if the cartons are loaded into roll containers, since the yoghurt in the cartons in the middle of the array on a roll container will mature at a different rate from the yoghurt in the cartons at the outside of the array.
  • the viscosity is rather high, and the yoghurt structure is subject to significant damage when it passes through a filling system if it is not properly designed.
  • Gentle handling in the filler system is important. The more gently the yoghurt is passed through the filler, the less dry additive such as milk powder or caseinate is needed to maintain the structure/viscosity of the yoghurt. Additives are a major cost of concern to the yoghurt producers.
  • apparatus for dosing fluid product comprising supply means for supplying said fluid product, a plurality of dosing devices each arranged to perform, alternately, an intake action to take in said fluid product and a delivery action to deliver said fluid product, indexing means arranged to index past said dosing devices whereby said dosing devices can deliver doses of said fluid product to said indexing means, and control means for controlling said dosing devices such that said dosing devices operate out of phase in relation to each other, characterised in that said control means so controls said dosing devices that the duration of each intake action of each dosing device is longer than the duration of each indexing cycle of said indexing means.
  • a method of dosing fluid product comprising supplying fluid product to a plurality of dosing devices during respective intake actions of said dosing devices, indexing receptacles past said dosing devices, dosing the fluid product from said dosing devices into said receptacles during respective delivery actions of said dosing devices, and controlling said dosing so that said dosing devices operate out of phase in relation to each other, characterised in that the duration of each intake action of each dosing device is longer than the duration of each indexing cycle of said receptacles.
  • the dosing devices are preferably out of phase with each other to an amount equal to one nth of a cycle, where n is the number of the said dosing devices, since this arrangement gives the best potential for lengthening the time period of each suction stroke.
  • the duration of the delivery action of each dosing device is longer than the duration of each movement period of the indexing means (which is preferably in the form of a conveyor) and also the sum of the duration of the delivery action and the duration of the movement period is substantially equal to the duration of the indexing cycle of the conveyor.
  • the dosing devices may be arranged in groups, for example in pairs, operated out of phase with each other; moreover, there may be any desired number more than one of single devices or groups of devices arranged out of phase with each other. If desired, the apparatus and method may be such that the single devices or groups of devices are operable not only out of phase with each other for products susceptible to damage, but also in phase with each other, particularly for multi-stage synchronous filling, for products not susceptible to damage.
  • the present apparatus and method are particularly applicable to dosing the product into receptacles, especially to filling containers, for example cartons, with the product, either with single-stage filling or multi-stage filling.
  • the supply to the first and second dosing devices is by way of a supply conduit common to both devices; thereby it is possible to arrange that there is a continuous flow of product through the supply conduit and thereby more readily possible to dispense with the conventional balance tank.
  • Figure 1 shows a diagrammatic side elevation of a filling system on a form-fill-seal machine for packaging yoghurt into cartons
  • Figure 2 shows a timing diagram for parts of the machine.
  • a relatively straight pipe 1 of relatively large cross-section conducts yoghurt from a cooler (not shown) to two pairs 2A and 2B of fillers 4A and
  • Each filler 4A or 4B includes an inlet duct 5A or 5B leading from the pipe 1, a rotary valve 6A or 6B having two peripheral rotary ports co-operating with two fixed peripheral ports and also having an axial rotary port and an axial fixed port aligned with each other, a suck-back device
  • Figure 1 of the character disclosed in EP-A-287201.
  • An indexing, endless chain conveyor 13 advances bottom-sealed, gable-top or flat-top cartons 14 in pairs A and B below firstly the filler pair 2A, where the carton pair A is filled, and then the filler pair 2B, where the carton pair B is filled. Beneath each of the filler pairs 2A and 2B, and actually below respective carton pairs thereat are respective lifters 15A and 15B, whereby bottom-up filling is performed. After filling, the cartons 14 are top-sealed.
  • Figure 2 illustrates the timing of the operations of the conveyor 13, the lifters 15A and 15B, the dosing device pair 12A and the dosing device pair 12B, the rotary valve pair 6A and the rotary valve pair 6B, the suck-back device pair 7A and the suck-back device pair 7B, relative to a main drive shaft (not shown) of the machine which directly operates the conveyor 13, over two revolutions of that shaft.
  • the dosing device pairs 12A and 12B operate directly oppositely out of phase with each other and that more than half of each cycle of each dosing device, and thus more than a whole indexing cycle of the conveyor 13, is devoted to the suction stroke of each dosing device, whereby any shocks and shear stresses on the yoghurt being drawn from the cooler are kept very low. It will also be noted that the suction strokes of the dosing device pairs 12A and 12B overlap slightly, so that there is a continuous flow of yoghurt through the pipe 1.
  • the motors driving the dosing devices 12A and 12B are programme-controlled as in EP-A- 287201.
  • each rotary valve 6A or 6B it is advantageous to make the diameter of the closure member of each rotary valve 6A or 6B relatively large, so that the port cross-sections can be relatively large and the flow through the valve is smooth.
  • Arranging the dosing device 12A or 12B with its longitudinal axis perpendicular to the flow axis through its rotary valve 6A or 6B enables the valve ports to be as close as possible to the pumping chamber of the dosing device 12A or 12B and so mitigates stress on the yoghurt at that location.
  • the product speed through the inlet port in the suction stroke can be 15% of that with a conventional apparatus.
  • the mass forces can be reduced by up to 90% compared with such conventional apparatus.
  • the square filler nozzles 9 are preferably of two different characters; one used for low viscosity products and the other used for high viscosity products.
  • the suck-back device 7A or 7B can be integrated in the valve 6A or 6B instead of being located in the outlet duct 8A or 8B.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Abstract

Appareil servant à doser un produit liquide et comprenant un conduit d'alimentation commun (1), une pluralité de dispositifs de dosage (12) dont le fonctionnement des uns est déphasé par rapport à celui des autres, et un convoyeur (13) positionnant des réceptacles, tout en les faisant passer sous les dispositifs de dosage (12). Des moyens de commande commandent les dispositifs de dosage (12), de sorte que la durée de l'apport du chaque dispositif de dosage (12) est plus longue que la durée du cycle de positionnement du convoyeur (13). Des clapets rotatifs (6) commandent l'apport et l'introduction du produit pour chaque dispositif de dosage et sont les seuls clapets à être placés entre le conduit (1) et les sorties respectives des dispositifs de dosage (12). Ces deux caractéristiques permettent de limiter considérablement la contrainte exercée sur le produit liquide en cours de dosage, ainsi que les risques de détérioration du produit pendant le dosage en ce qui concerne des produits très visqueux, tels que du yoghourt.
PCT/IB1999/000792 1998-04-30 1999-04-30 Procede et appareil servant a doser un produit liquide WO1999057013A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9809123.4 1998-04-30
GBGB9809123.4A GB9809123D0 (en) 1998-04-30 1998-04-30 Method and apparatus

Publications (1)

Publication Number Publication Date
WO1999057013A1 true WO1999057013A1 (fr) 1999-11-11

Family

ID=10831164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1999/000792 WO1999057013A1 (fr) 1998-04-30 1999-04-30 Procede et appareil servant a doser un produit liquide

Country Status (2)

Country Link
GB (1) GB9809123D0 (fr)
WO (1) WO1999057013A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB807338A (en) * 1954-11-02 1959-01-14 Unilever Ltd Automatic filling devices for liquid or plastic substances
DE2415237A1 (de) 1974-03-29 1975-10-16 Benz & Hilgers Gmbh Vorrichtung zum dosierten abfuellen von fluessigen, im ruhezustand erstarrenden stoffen, wie margarine o.dgl.
FR2342203A1 (fr) 1976-02-24 1977-09-23 Erca Procede et installation de remplissage de recipients avec une quantite de produits determines
EP0199538A1 (fr) 1985-04-16 1986-10-29 Elopak A/S Tuyère de remplissage pour courant de liquide
EP0234102A1 (fr) 1985-11-27 1987-09-02 Elopak A/S Appareil de commande d'un courant liquide
EP0287201A2 (fr) 1987-02-20 1988-10-19 Elopak Systems Ag Appareil de dosage
DE8812268U1 (de) * 1988-09-28 1988-12-08 Bentele, Hubert Vorrichtung zum dosierten Abfüllen von Käsebruch
WO1995024615A1 (fr) * 1994-03-04 1995-09-14 Stormax International As Procede et appareil de remplissage volumetrique de moules avec une masse fluide

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB807338A (en) * 1954-11-02 1959-01-14 Unilever Ltd Automatic filling devices for liquid or plastic substances
DE2415237A1 (de) 1974-03-29 1975-10-16 Benz & Hilgers Gmbh Vorrichtung zum dosierten abfuellen von fluessigen, im ruhezustand erstarrenden stoffen, wie margarine o.dgl.
FR2342203A1 (fr) 1976-02-24 1977-09-23 Erca Procede et installation de remplissage de recipients avec une quantite de produits determines
EP0199538A1 (fr) 1985-04-16 1986-10-29 Elopak A/S Tuyère de remplissage pour courant de liquide
EP0234102A1 (fr) 1985-11-27 1987-09-02 Elopak A/S Appareil de commande d'un courant liquide
EP0287201A2 (fr) 1987-02-20 1988-10-19 Elopak Systems Ag Appareil de dosage
DE8812268U1 (de) * 1988-09-28 1988-12-08 Bentele, Hubert Vorrichtung zum dosierten Abfüllen von Käsebruch
WO1995024615A1 (fr) * 1994-03-04 1995-09-14 Stormax International As Procede et appareil de remplissage volumetrique de moules avec une masse fluide

Also Published As

Publication number Publication date
GB9809123D0 (en) 1998-07-01

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