EP3070012B1 - Tray sealing machine - Google Patents

Tray sealing machine Download PDF

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Publication number
EP3070012B1
EP3070012B1 EP15160089.7A EP15160089A EP3070012B1 EP 3070012 B1 EP3070012 B1 EP 3070012B1 EP 15160089 A EP15160089 A EP 15160089A EP 3070012 B1 EP3070012 B1 EP 3070012B1
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EP
European Patent Office
Prior art keywords
tray
support plate
shell
sealing
sealing machine
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP15160089.7A
Other languages
German (de)
French (fr)
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EP3070012A1 (en
Inventor
Alireza Taghipour
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
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Multivac Sepp Haggenmueller GmbH and Co KG
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.)
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Application filed by Multivac Sepp Haggenmueller GmbH and Co KG filed Critical Multivac Sepp Haggenmueller GmbH and Co KG
Priority to ES15160089.7T priority Critical patent/ES2664849T3/en
Priority to EP15160089.7A priority patent/EP3070012B1/en
Publication of EP3070012A1 publication Critical patent/EP3070012A1/en
Application granted granted Critical
Publication of EP3070012B1 publication Critical patent/EP3070012B1/en
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    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing

Definitions

  • the invention relates to a shell sealing machine according to the preamble of claim 1 and to a method according to claim 6.
  • the EP 1 988 024 A1 discloses a packaging machine having a sealing station, wherein the sealing station comprises means for detecting misalignment of a tray in a tray receptacle.
  • the means is a camera that checks after receiving the shells by lifting a sealing tool base and before closing with a sealing tool top along the top or surface of the sealing die base on a above the bowl receptacle protruding shell, so that it during the sealing process of a lid foil on the shell itself does not cause damage to the tools.
  • the camera triggers a stop of the closing movement of the sealing tool lower part via the control.
  • a disadvantage of this design is that even over the shell edge protruding products are incorrectly evaluated by the camera as faulty inserted trays. Thus, it is not possible to use this type of monitoring for protruding products.
  • the object of the present invention is to provide an alternative shell sealing machine which has a monitoring device only for the position detection of the shell in the shell receptacle.
  • the shell sealing machine comprises a sealing tool base and a gripper system for transporting n shells, the sealing tool base having n vertically movable support plates and a shell receptacle with n openings for one shell each. Where n is an integer greater than or equal to one.
  • the tray sealing machine according to the invention is characterized in that each support plate has a test device for detecting a misalignment of the shell on the support plate to a correct position of the tray bottom on the support plate to be able to infer a correct position of the shell in the shell receptacle.
  • the assumption of a "correct position" of the shell in the shell receptacle means in this context that all designated areas of an edge or flange of the shell rest on the designated areas of the shell receptacle. At the same time, the tray bottom occupies a certain position relative to the support plate assigned to it. Consequently, the assumption of this relative position of the tray base to the support plate is also referred to as "correct position”.
  • the shell sealing machine according to the invention and also the method according to the invention are not only suitable for plastic shells but can also be used particularly advantageously for glass shells.
  • the test apparatus comprises a vacuum source and at least one pressure gauge, wherein the test means is configured to vacuum-suck a tray bottom of the tray to the backup platen, the backup platters being in a test position.
  • a control is preferably provided in order to detect the values of the negative pressure from the pressure gauge.
  • the controller can evaluate based on the negative pressure or after the course of the negative pressure after switching on the vacuum source, if all shells are correctly in the tray receptacle and thus all rest correctly on the respective support plate.
  • a measurement of the value of the pressure is made also predetermined comparison value, this is considered to the effect that at least one shell does not rest properly on its associated support plate. If, on the other hand, the measured value of the pressure is below the predetermined reference value or below a second one, predetermined comparison value, this is considered to the effect that all shells rest correctly on their respective assigned support plates.
  • a controller is provided to move the support plates by means of a lifting device from a receiving position to a test position.
  • a lifting device is provided to move the support plates by means of a lifting device from a receiving position to a test position.
  • the shell can be retracted into the shell receptacle and this position can be checked.
  • the support plates have on their upper side a circumferential seal in order to form an evacuable space together with the resting on the seal tray bottom.
  • a vacuum is applied to the top of the support plate and then detects the negative pressure in the space between the support plate and the shell located on it.
  • the negative pressure is preferably detected by means of a pressure gauge, which is arranged in a line between the support plate and the vacuum source.
  • the vacuum source may be a vacuum pump and in the line to the support plate may be a valve which is switched via the controller in order to be able to connect and disconnect the vacuum source.
  • FIG. 1 shows a tray sealing machine 1 with a sealing station 2, which seals trays 20 with a cover sheet 3, and a gripper system 4, which moves the trays 20 in a transport direction P from a feed conveyor 5 in the sealing station 2.
  • the sealing station 2 has a sealing tool lower part 6 and a sealing tool upper part 7 arranged above it.
  • a controller 18 controls and monitors all operations in the tray sealing machine 1.
  • FIG. 2 shows the sealing station 2 in a sectional view of the sealing die base 6.
  • the sealing tool base 6 includes a shell receptacle 8 for receiving n shells, here for example. Of two shells 20.
  • the shells 20 are from the feed conveyor 5 by means of the gripper system 4 on support plate 9, located in a raised position, implemented, wherein for each shell 20 each have a support plate 9 and an opening 10 in the shell receptacle 8 are provided.
  • the support plates 9 are common connected via a device 11 and vertically movable and positionable by a lifting device 12.
  • the lifting device 12 preferably has a servo drive.
  • the support plate 9 has a test device 21 in order to determine the position of a resting on the support plate 9 shell bottom 20 a of the shell 20.
  • test device 21 shown as a vacuum device or vacuum device.
  • the support plate 9 has a circumferential seal 13 and within this seal 13, one or more openings 14 are provided on the upper side 9a of the support plate 9, which are connected by means of a line 15 with a pressure gauge 16 and a downstream vacuum source 17.
  • the vacuum source 17, the pressure gauge 16 and the lifting device 12 or its drive are connected to a controller 18.
  • FIG. 3 shows the sealing tool lower part 6 with lowered Stütztensem 9, wherein the lifting device 12 is positioned by means of the controller 18, the support plate 9 to a lowered position in which a test of the shell 20 on the shell bottom 20a is possible, hereinafter referred to as horr ein.
  • the dimensions of the shell 20, preferably the height H from the shell bottom 20a to the underside of a shell edge 20b, in the controller 18 can be stored and stored.
  • a negative pressure P between the tray bottom 20 a and the support plate 9 within the seal 13 is generated by means of the vacuum source 17.
  • a negative pressure which is detected by the pressure gauge 16 and the measured value is forwarded to the controller 18.
  • the controller 18 is thus able to draw conclusions on the correctness of the position of the tray bottom 20a on the support plate 9 and thus implicitly also a correct position of the shell 20 in the shell receptacle 8 and thus in the sealing tool lower part based on the vacuum curve or on the basis of individual values 6 determine.
  • the movement of the sealing tool lower part 6 upwards to the sealing tool upper part 7 can be released since the shells 20 rest correctly on their support points 9.
  • FIG. 4 In contrast to FIG. 3 show the FIG. 4 a tilted in the tray receptacle 8 and thus incorrectly or incorrectly recorded shell 20 above the left support plate 9, while the shell 20 above the right support plate 9 has a correct position.
  • a generated by the vacuum source 17 vacuum on the backup plates 9 leads to a different pressure curve or to other pressure values FIG. 3 because air L is attracted from the interior of the sealing tool lower part 6 on the left support plate 9.
  • the controller 18 recognizes on the basis of the pressure values transmitted by the pressure measuring device 16, specifically on the slower pressure drop in comparison to the "correct" situation in FIG. 3 in that at least one shell bottom 20a does not rest correctly on the associated support plate 9. The reason for this lies in a shell 20 which is located incorrectly in the shell receptacle 8. The movement of the sealing tool lower part 6 upward to the sealing tool top part 7 is not started.
  • FIG. 5 shows a first alternative embodiment of the test device 21 of the support plate 9, wherein the position of the shells 20 as in FIG. 4 is present.
  • the test device 21 is in this case designed as an optical sensor 30, preferably as a reflex light barrier.
  • the controller 18 evaluates the signals of the optical sensors 30, which monitor the tray bottom 20a, and detects a faulty inserted tray 20 on the left side (since the light reflection from the tray bottom is not or less reflected back on the sensor 30) and a correctly inserted tray 20 on the right side.
  • the movement of the sealing tool lower part 6 upwards to the sealing tool upper part 7 is also prevented in this case.
  • FIG. 6 shows a second alternative embodiment of the test device 21 of the support plate 9, wherein the position of the shells 20 as in FIG. 4 or 5 is present.
  • the test device 21 is in this case a plunger 40, which is guided in the support plate 9 and is received vertically relative to this movable. Between the underside of the plunger 40 and the support plate 9, a spring 41 is provided which holds the plunger 40 in a provided basic position.
  • a sensor 42 is provided at the end of a guide 43 of the plunger 40 to detect an activated position in which the shell 20 moves the plunger 40 into the guide 43.
  • the controller 18 evaluates the signals from the sensors 42, which monitor the plunger 40, and detects based on the position of the plunger 40 detected by the sensor 42 an incorrectly inserted shell 20 on the left side and a correctly inserted shell 20 on the right side.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closing Of Containers (AREA)
  • Vacuum Packaging (AREA)

Description

Die Erfindung bezieht sich auf eine Schalenversiegelungsmaschine gemäß dem Oberbegriff des Anspruchs 1 sowie auf ein Verfahren gemäß dem Anspruch 6.The invention relates to a shell sealing machine according to the preamble of claim 1 and to a method according to claim 6.

Die EP 1 988 024 A1 offenbart eine Verpackungsmaschine mit einer Versiegelungsstation, wobei die Versiegelungsstation ein Mittel zum Erfassen einer Fehlausrichtung einer Schale in einer Schalenaufnahme umfasst. Beispielsweise ist das Mittel dabei eine Kamera, die nach der Aufnahme der Schalen durch Anheben eines Siegelwerkzeugunterteils und vor dem Schließen mit einem Siegelwerkzeugoberteil entlang der Oberseite bzw. Oberfläche des Siegelwerkzeugunterteils auf eine nach oben über die Schalenaufnahme überstehende Schale prüft, damit es beim Siegelvorgang einer Deckelfolie auf die Schale selbst nicht zu Schäden an den Werkzeugen führt. Im Falle einer fehlerhaft eingelegten Schale löst die Kamera über die Steuerung ein Stoppen der Schließbewegung des Siegelwerkzeugunterteils aus. Nachteilig an dieser Ausführung ist, dass auch über den Schalenrand überstehende Produkte von der Kamera fälschlicherweise als fehlerhaft eingelegte Schalen ausgewertet werden. Somit ist es nicht möglich, diese Art der Überwachung bei überstehenden Produkten einzusetzen.The EP 1 988 024 A1 discloses a packaging machine having a sealing station, wherein the sealing station comprises means for detecting misalignment of a tray in a tray receptacle. For example, the means is a camera that checks after receiving the shells by lifting a sealing tool base and before closing with a sealing tool top along the top or surface of the sealing die base on a above the bowl receptacle protruding shell, so that it during the sealing process of a lid foil on the shell itself does not cause damage to the tools. In the case of an incorrectly inserted shell, the camera triggers a stop of the closing movement of the sealing tool lower part via the control. A disadvantage of this design is that even over the shell edge protruding products are incorrectly evaluated by the camera as faulty inserted trays. Thus, it is not possible to use this type of monitoring for protruding products.

Aufgabe der vorliegenden Erfindung ist es, eine alternative Schalenversiegelungsmaschine bereitzustellen, die eine Überwachungseinrichtung nur für die Lageerkennung der Schale in der Schalenaufnahme aufweist.The object of the present invention is to provide an alternative shell sealing machine which has a monitoring device only for the position detection of the shell in the shell receptacle.

Diese Aufgabe wird gelöst durch eine Schalenversiegelungsmaschine mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren mit den Merkmalen des Anspruchs 6. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by a shell sealing machine with the features of claim 1 and by a method having the features of claim 6. Advantageous developments of the invention are specified in the subclaims.

Die erfindungsgemäße Schalenversiegelungsmaschine umfasst ein Siegelwerkzeugunterteil und ein Greifersystem zum Transportieren von n Schalen, wobei das Siegelwerkzeugunterteil n vertikal bewegbare Stützteller und eine Schalenaufnahme mit n Öffnungen für jeweils eine Schale aufweist. Dabei ist n eine ganzzahlige Zahl größer gleich eins. Die erfindungsgemäße Schalenversiegelungsmaschine zeichnet sich dadurch aus, dass jeder Stützteller eine Prüfvorrichtung zur Erfassung einer Fehlausrichtung der Schale auf dem Stützteller aufweist, um anhand einer korrekten Lage des Schalenbodens auf dem Stützteller auf eine korrekte Lage der Schale in der Schalenaufnahme rückschließen zu können.The shell sealing machine according to the invention comprises a sealing tool base and a gripper system for transporting n shells, the sealing tool base having n vertically movable support plates and a shell receptacle with n openings for one shell each. Where n is an integer greater than or equal to one. The tray sealing machine according to the invention is characterized in that each support plate has a test device for detecting a misalignment of the shell on the support plate to a correct position of the tray bottom on the support plate to be able to infer a correct position of the shell in the shell receptacle.

Das Einnehmen einer "korrekten Lage" der Schale in der Schalenaufnahme bedeutet in diesem Zusammenhang, dass sämtliche dafür vorgesehenen Bereiche eines Randes oder Flansches der Schale auf den dafür vorgesehenen Bereichen der Schalenaufnahme aufliegen. Gleichzeitig nimmt der Schalenboden eine bestimmte Lage relativ zu dem ihm zugeordneten Stützteller ein. Konsequenterweise wird das Einnehmen dieser Relativposition des Schalenbodens zum Stützteller ebenfalls als "korrekte Lage" bezeichnet.The assumption of a "correct position" of the shell in the shell receptacle means in this context that all designated areas of an edge or flange of the shell rest on the designated areas of the shell receptacle. At the same time, the tray bottom occupies a certain position relative to the support plate assigned to it. Consequently, the assumption of this relative position of the tray base to the support plate is also referred to as "correct position".

Es hat sich gezeigt, dass die erfindungsgemäße Schalenversiegelungsmaschine und ebenso das erfindungsgemäße Verfahren nicht nur für Schalen aus Kunststoff geeignet sind, sondern besonders vorteilhaft auch einsetzbar sind für Schalen aus Glas.It has been found that the shell sealing machine according to the invention and also the method according to the invention are not only suitable for plastic shells but can also be used particularly advantageously for glass shells.

Vorzugsweise umfasst die Prüfvorrichtung eine Vakuumquelle und wenigstens ein Druckmessgerät, wobei die Prüfeinrichtung dazu konfiguriert ist, einen Schalenboden der Schale mittels Vakuum an den Stützteller anzusaugen, wobei sich die Stützteller in einer Prüfposition befinden. Vorteilhaft daran ist der konstruktiv einfache und damit kostengünstige Aufbau der Prüfvorrichtung, da die Schalenverschließmaschine zum Evakuieren der Schale bereits eine Vakuumquelle aufweist, die vor dem Evakuiervorgang für die Prüfung auf fehlerhaft eingelegte Schalen eingesetzt werden kann.Preferably, the test apparatus comprises a vacuum source and at least one pressure gauge, wherein the test means is configured to vacuum-suck a tray bottom of the tray to the backup platen, the backup platters being in a test position. An advantage of this is the structurally simple and therefore cost-effective design of the test apparatus, since the tray sealing machine for evacuating the shell already has a vacuum source that can be used before the evacuation for testing on faulty inserted trays.

Dabei ist bevorzugt eine Steuerung vorgesehen, um die Werte des Unterdrucks vom Druckmessgerät zu erfassen. Somit kann die Steuerung anhand des Unterdrucks oder nach dem Verlauf des Unterdrucks nach dem Zuschalten der Vakuumquelle auswerten, ob sich alle Schalen korrekt in der Schalenaufnahme befinden und damit alle auf dem jeweiligen Stützteller korrekt aufliegen.In this case, a control is preferably provided in order to detect the values of the negative pressure from the pressure gauge. Thus, the controller can evaluate based on the negative pressure or after the course of the negative pressure after switching on the vacuum source, if all shells are correctly in the tray receptacle and thus all rest correctly on the respective support plate.

Beispielsweise erfolgt zu einem vorgegebenen Zeitpunkt nach dem Zuschalten der Vakuumquelle, beispielsweise zu einem vorgegebenen Zeitpunkt von 0,2 bis 2 Sekunden nach dem Zuschalten der Vakuumquelle, d.h. dem Beginn des Erzeugens von Unterdruck, eine Messung des Werts des Drucks. Liegt dieser Wert oberhalb eines ebenfalls vorgegebenen Vergleichswerts, wird dies dahingehend gewertet, dass mindestens eine Schale nicht korrekt auf dem ihr zugeordneten Stützteller aufliegt. Liegt der gemessene Wert des Drucks hingegen unter dem vorgegebenen Vergleichswert oder unterhalb eines zweiten, vorgegebenen Vergleichswerts, wird dies dahingehend gewertet, dass alle Schalen korrekt auf den ihnen jeweils zugeordneten Stütztellern aufliegen.For example, at a predetermined time after the vacuum source is turned on, for example, at a predetermined time of 0.2 to 2 seconds after the vacuum source is turned on, ie, the beginning of generating negative pressure, a measurement of the value of the pressure is made also predetermined comparison value, this is considered to the effect that at least one shell does not rest properly on its associated support plate. If, on the other hand, the measured value of the pressure is below the predetermined reference value or below a second one, predetermined comparison value, this is considered to the effect that all shells rest correctly on their respective assigned support plates.

Vorzugsweise ist eine Steuerung vorgesehen, um die Stützteller mittels einer Hubeinrichtung von einer Aufnahmeposition in eine Prüfposition zu bewegen. So kann noch vor dem eigentlichen Siegelhub die Schale in die Schalenaufnahme eingefahren werden und diese Position geprüft werden.Preferably, a controller is provided to move the support plates by means of a lifting device from a receiving position to a test position. Thus, even before the actual sealing stroke, the shell can be retracted into the shell receptacle and this position can be checked.

In einer besonderen Ausführungsform weisen die Stützteller an ihrer Oberseite eine umlaufende Dichtung auf, um zusammen mit dem auf der Dichtung aufliegenden Schalenboden einen evakuierbaren Raum zu bilden.In a particular embodiment, the support plates have on their upper side a circumferential seal in order to form an evacuable space together with the resting on the seal tray bottom.

Ein erfindungsgemäßes Verfahren zum Betrieb einer Schalenversiegelungsmaschine weist folgende Schritte auf:

  • Zuführen von Schalen in eine Siegelstation, die ein Siegelwerkzeugunterteil umfasst,
  • Absetzen der Schalen auf Stützteller des Siegelwerkzeugunterteils, wobei sich die Stützteller in einer oberen Aufnahmeposition befinden,
  • Absenken der Stützteller in eine untere Prüfposition,
  • Erfassen einer Fehlausrichtung der Schalen auf dem jeweiligen Stützteller mittels einer Prüfeinrichtung der Stützteller.
A method according to the invention for operating a tray sealing machine comprises the following steps:
  • Feeding trays into a sealing station comprising a sealing tool base,
  • Depositing the trays onto the support plate of the sealing tool lower part, wherein the support plates are in an upper receiving position,
  • Lowering the backing pads into a lower inspection position,
  • Detecting a misalignment of the shells on the respective support plate by means of a test device of the support plate.

So kann bereits vor dem Siegelvorgang und dem Schließvorgang des Siegelwerkzeugunterteils und des Siegelwerkzeugoberteils eine fehlerhaft in der Schalenaufnahme befindliche Schale erkannt werden, unabhängig davon, ob ein nach oben über den Schalenrand überstehendes Produkt verpackt werden soll.Thus, even before the sealing process and the closing operation of the sealing tool bottom part and the sealing tool upper part, a shell located incorrectly in the shell receptacle can be detected, regardless of whether a product projecting upwards beyond the shell edge is to be packed.

Vorzugsweise wird dabei an der Oberseite des Stütztellers ein Vakuum angelegt und anschließend der Unterdruck im Raum zwischen dem Stützteller und der auf ihm befindlichen Schale erfasst.Preferably, a vacuum is applied to the top of the support plate and then detects the negative pressure in the space between the support plate and the shell located on it.

Der Unterdruck wird bevorzugt mittels eines Druckmessgeräts erfasst, das in einer Leitung zwischen dem Stützteller und der Vakuumquelle angeordnet ist.The negative pressure is preferably detected by means of a pressure gauge, which is arranged in a line between the support plate and the vacuum source.

Die Vakuumquelle kann eine Vakuumpumpe sein und in der Leitung zum Stützteller kann sich ein Ventil befinden, das über die Steuerung geschaltet wird, um die Vakuumquelle zu- und abschalten zu können.The vacuum source may be a vacuum pump and in the line to the support plate may be a valve which is switched via the controller in order to be able to connect and disconnect the vacuum source.

Im Folgenden wird ein vorteilhaftes Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. Im Einzelnen zeigen:

Fig. 1
eine erfindungsgemäße Schalenversiegelungsmaschine,
Fig. 2
eine schematische Schnittansicht des Siegelwerkzeugunterteils mit angehobenen Stütztellern,
Fig. 3
eine schematische Schnittansicht des Siegelwerkzeugunterteils mit abgesenkten Stütztellern,
Fig. 4
eine Ansicht wie Fig. 3 aber mit einer fehlerhaft eingelegten Schale,
Fig. 5
eine erste alternative Ausführung einer Prüfeinrichtung und
Fig. 6
eine zweite alternative Ausführung einer Prüfeinrichtung.
In the following, an advantageous embodiment of the invention is explained in detail with reference to a drawing. In detail show:
Fig. 1
a shell sealing machine according to the invention,
Fig. 2
a schematic sectional view of the sealing tool base with raised support plates,
Fig. 3
a schematic sectional view of the sealing tool base with lowered support plates,
Fig. 4
a view like Fig. 3 but with a faultily inserted shell,
Fig. 5
a first alternative embodiment of a tester and
Fig. 6
a second alternative embodiment of a test device.

Gleiche Komponenten sind in den Figuren durchgängig mit gleichen Bezugszeichen versehen.The same components are provided throughout the figures with the same reference numerals.

Figur 1 zeigt eine Schalenversiegelungsmaschine 1 mit einer Siegelstation 2, die Schalen 20 mit einer Deckelfolie 3 versiegelt, und einem Greifersystem 4, das die Schalen 20 in einer Transportrichtung P von einem Zuführförderer 5 in die Siegelstation 2 bewegt. Die Siegelstation 2 weist ein Siegelwerkzeugunterteil 6 und ein darüber angeordnetes Siegelwerkzeugoberteil 7 auf. Eine Steuerung 18 steuert und überwacht alle Vorgänge in der Schalenversiegelungsmaschine 1. FIG. 1 shows a tray sealing machine 1 with a sealing station 2, which seals trays 20 with a cover sheet 3, and a gripper system 4, which moves the trays 20 in a transport direction P from a feed conveyor 5 in the sealing station 2. The sealing station 2 has a sealing tool lower part 6 and a sealing tool upper part 7 arranged above it. A controller 18 controls and monitors all operations in the tray sealing machine 1.

Figur 2 zeigt die Siegelstation 2 in einer Schnittdarstellung des Siegelwerkzeugunterteils 6. Das Siegelwerkzeugunterteil 6 umfasst eine Schalenaufnahme 8 zur Aufnahme von n Schalen, hier bspw. von zwei Schalen 20. Die Schalen 20 werden vom Zuführförderer 5 mittels des Greifersystems 4 auf Stützteller 9, die sich in einer angehobenen Stellung befinden, umgesetzt, wobei für jede Schale 20 jeweils ein Stützteller 9 und jeweils eine Öffnung 10 in der Schalenaufnahme 8 vorgesehen sind. Die Stützteller 9 sind gemeinsam über eine Vorrichtung 11 verbunden und von einer Hubeinrichtung 12 vertikal beweg- und positionierbar. Die Hubeinrichtung 12 weist vorzugsweise einen Servoantrieb auf. Der Stützteller 9 weist eine Prüfeinrichtung 21 auf, um die Lage eines auf dem Stützteller 9 aufliegenden Schalenbodens 20a der Schale 20 zu ermitteln. In einer ersten Ausführung ist in Fig. 2 die Prüfeinrichtung 21 als Vakuumeinrichtung bzw. Unterdruckeinrichtung dargestellt. Der Stützteller 9 weist eine umlaufende Dichtung 13 auf und innerhalb dieser Dichtung 13 sind eine oder mehrere Öffnungen 14 an der Oberseite 9a des Stütztellers 9 vorgesehen, die mittels einer Leitung 15 mit einem Druckmessgerät 16 und einer nachgeordneten Vakuumquelle 17 verbunden sind. Die Vakuumquelle 17, das Druckmessgerät 16 und die Hubeinrichtung 12 bzw. dessen Antrieb sind mit einer Steuerung 18 verbunden. FIG. 2 shows the sealing station 2 in a sectional view of the sealing die base 6. The sealing tool base 6 includes a shell receptacle 8 for receiving n shells, here for example. Of two shells 20. The shells 20 are from the feed conveyor 5 by means of the gripper system 4 on support plate 9, located in a raised position, implemented, wherein for each shell 20 each have a support plate 9 and an opening 10 in the shell receptacle 8 are provided. The support plates 9 are common connected via a device 11 and vertically movable and positionable by a lifting device 12. The lifting device 12 preferably has a servo drive. The support plate 9 has a test device 21 in order to determine the position of a resting on the support plate 9 shell bottom 20 a of the shell 20. In a first embodiment is in Fig. 2 the test device 21 shown as a vacuum device or vacuum device. The support plate 9 has a circumferential seal 13 and within this seal 13, one or more openings 14 are provided on the upper side 9a of the support plate 9, which are connected by means of a line 15 with a pressure gauge 16 and a downstream vacuum source 17. The vacuum source 17, the pressure gauge 16 and the lifting device 12 or its drive are connected to a controller 18.

Figur 3 zeigt das Siegelwerkzeugunterteil 6 mit abgesenkten Stütztellem 9, wobei die Hubeinrichtung 12 mittels der Steuerung 18 die Stützteller 9 auf eine abgesenkte Stellung positioniert, in der eine Prüfung der Schale 20 über den Schalenboden 20a möglich ist, im folgenden Text als Prüfstellung benannt. Hierzu sind die Abmessungen der Schale 20, vorzugsweise die Höhe H vom Schalenboden 20a zur Unterseite eines Schalenrands 20b, in der Steuerung 18 eingeb- und abspeicherbar. In dieser Prüfstellung wird mittels der Vakuumquelle 17 ein Unterdruck P zwischen dem Schalenboden 20a und dem Stützteller 9 innerhalb der Dichtung 13 erzeugt. Sind die Schalen 20, wie in Fig. 3 gezeigt, einwandfrei in der Schalenaufnahme 8 aufgenommen, so entsteht in sehr kurzer Zeit ein Unterdruck, der von dem Druckmessgerät 16 erfasst und der Messwert an die Steuerung 18 weitergeleitet wird. Die Steuerung 18 ist somit in der Lage, anhand des Vakuumverlaufs oder anhand von einzelnen Werten Rückschlüsse zu ziehen auf die Korrektheit der Lage des Schalenbodens 20a auf dem Stützteller 9 und damit implizit auch eine korrekte Lage der Schale 20 in der Schalenaufnahme 8 und somit im Siegelwerkzeugunterteil 6 festzustellen. Die Bewegung des Siegelwerkzeugunterteils 6 nach oben zum Siegelwerkzeugoberteil 7 kann freigegeben werden, da die Schalen 20 korrekt auf ihren Stützstellen 9 aufliegen. FIG. 3 shows the sealing tool lower part 6 with lowered Stütztensem 9, wherein the lifting device 12 is positioned by means of the controller 18, the support plate 9 to a lowered position in which a test of the shell 20 on the shell bottom 20a is possible, hereinafter referred to as Prüfstellung. For this purpose, the dimensions of the shell 20, preferably the height H from the shell bottom 20a to the underside of a shell edge 20b, in the controller 18 can be stored and stored. In this test position, a negative pressure P between the tray bottom 20 a and the support plate 9 within the seal 13 is generated by means of the vacuum source 17. Are the bowls 20, as in Fig. 3 shown, properly recorded in the shell receptacle 8, so in a very short time, a negative pressure, which is detected by the pressure gauge 16 and the measured value is forwarded to the controller 18. The controller 18 is thus able to draw conclusions on the correctness of the position of the tray bottom 20a on the support plate 9 and thus implicitly also a correct position of the shell 20 in the shell receptacle 8 and thus in the sealing tool lower part based on the vacuum curve or on the basis of individual values 6 determine. The movement of the sealing tool lower part 6 upwards to the sealing tool upper part 7 can be released since the shells 20 rest correctly on their support points 9.

Im Gegensatz zu Figur 3 zeigt die Figur 4 eine in der Schalenaufnahme 8 verkantet und damit nicht korrekt bzw. fehlerhaft aufgenommene Schale 20 oberhalb des linken Stütztellers 9, während die Schale 20 oberhalb des rechten Stütztellers 9 eine korrekte Lage aufweist. Ein mittels der Vakuumquelle 17 erzeugtes Vakuum an den Stütztellern 9 führt zu einem anderen Druckverlauf bzw. zu anderen Druckwerten gegenüber Figur 3, da am linken Stützteller 9 Luft L aus dem Inneren des Siegelwerkzeugunterteils 6 angezogen wird. Die Steuerung 18 erkennt anhand der vom Druckmessgerät 16 übermittelten Druckwerte, konkret an dem langsameren Druckabfall im Vergleich zur "korrekten" Situation in Figur 3, dass wenigstens ein Schalenboden 20a nicht korrekt auf dem dazugehörenden Stützteller 9 aufliegt. Die Ursache dafür liegt in einer fehlerhaft in der Schalenaufnahme 8 liegenden Schale 20. Die Bewegung des Siegelwerkzeugunterteils 6 nach oben zum Siegelwerkzeugoberteil 7 wird nicht gestartet.In contrast to FIG. 3 show the FIG. 4 a tilted in the tray receptacle 8 and thus incorrectly or incorrectly recorded shell 20 above the left support plate 9, while the shell 20 above the right support plate 9 has a correct position. A generated by the vacuum source 17 vacuum on the backup plates 9 leads to a different pressure curve or to other pressure values FIG. 3 because air L is attracted from the interior of the sealing tool lower part 6 on the left support plate 9. The controller 18 recognizes on the basis of the pressure values transmitted by the pressure measuring device 16, specifically on the slower pressure drop in comparison to the "correct" situation in FIG. 3 in that at least one shell bottom 20a does not rest correctly on the associated support plate 9. The reason for this lies in a shell 20 which is located incorrectly in the shell receptacle 8. The movement of the sealing tool lower part 6 upward to the sealing tool top part 7 is not started.

Figur 5 zeigt eine erste alternative Ausführungsform der Prüfeinrichtung 21 des Stütztellers 9, wobei die Lage der Schalen 20 wie in Figur 4 vorliegt. Die Prüfeinrichtung 21 ist hierbei als optischer Sensor 30, vorzugsweise als Reflexlichtschranke, ausgeführt. Mittels der Steuerung 18 und der Hubeinrichtung 12 werden die Stützteller 9 in Abhängigkeit von der Höhe H und dem Prüfabstand des optischen Sensors 30 nach unten in die Prüfstellung positioniert. Anschließend wertet die Steuerung 18 die Signale der optischen Sensoren 30, die den Schalenboden 20a überwachen, aus und erkennt eine fehlerhaft eingelegte Schale 20 auf der linken Seite (da hier der Lichtreflex vom Schalenboden nicht oder weniger stark auf dem Sensor 30 zurück reflektiert wird) und eine korrekt eingelegte Schale 20 auf der rechten Seite. Die Bewegung des Siegelwerkzeugunterteils 6 nach oben zum Siegelwerkzeugoberteil 7 wird in diesem Fall auch verhindert. FIG. 5 shows a first alternative embodiment of the test device 21 of the support plate 9, wherein the position of the shells 20 as in FIG. 4 is present. The test device 21 is in this case designed as an optical sensor 30, preferably as a reflex light barrier. By means of the controller 18 and the lifting device 12, the support plates 9 are positioned depending on the height H and the test distance of the optical sensor 30 down into the test position. Subsequently, the controller 18 evaluates the signals of the optical sensors 30, which monitor the tray bottom 20a, and detects a faulty inserted tray 20 on the left side (since the light reflection from the tray bottom is not or less reflected back on the sensor 30) and a correctly inserted tray 20 on the right side. The movement of the sealing tool lower part 6 upwards to the sealing tool upper part 7 is also prevented in this case.

Figur 6 zeigt eine zweite alternative Ausführungsform der Prüfeinrichtung 21 des Stütztellers 9, wobei die Lage der Schalen 20 wie in Figur 4 oder 5 vorliegt. Die Prüfeinrichtung 21 ist hierbei ein Stößel 40, der im Stützteller 9 geführt und vertikal relativ zu diesem bewegbar aufgenommen ist. Zwischen der Unterseite des Stößels 40 und dem Stützteller 9 ist eine Feder 41 vorgesehen, die den Stößel 40 in einer vorgesehen Grundstellung hält. Ein Sensor 42 ist am Ende einer Führung 43 des Stößels 40 vorgesehen, um eine aktivierte Stellung zu erkennen, in der die Schale 20 den Stößel 40 in die Führung 43 bewegt. Dabei wertet die Steuerung 18 die Signale der Sensoren 42, die den Stößel 40 überwachen, aus und erkennt anhand der vom Sensor 42 ermittelten Position des Stößels 40 eine fehlerhaft eingelegte Schale 20 auf der linken Seite und eine korrekt eingelegte Schale 20 auf der rechten Seite. FIG. 6 shows a second alternative embodiment of the test device 21 of the support plate 9, wherein the position of the shells 20 as in FIG. 4 or 5 is present. The test device 21 is in this case a plunger 40, which is guided in the support plate 9 and is received vertically relative to this movable. Between the underside of the plunger 40 and the support plate 9, a spring 41 is provided which holds the plunger 40 in a provided basic position. A sensor 42 is provided at the end of a guide 43 of the plunger 40 to detect an activated position in which the shell 20 moves the plunger 40 into the guide 43. In this case, the controller 18 evaluates the signals from the sensors 42, which monitor the plunger 40, and detects based on the position of the plunger 40 detected by the sensor 42 an incorrectly inserted shell 20 on the left side and a correctly inserted shell 20 on the right side.

Claims (8)

  1. Tray sealing machine (1) comprising a sealing tool lower part (6) and a gripper system (4) for transporting n trays (20), wherein the sealing tool lower part (6) comprises n vertically moveable support plates (9) and a tray receptacle (8) with n openings (10) for one tray (20) each, characterized in that each support plate (9) comprises a checking device (21) for detecting a misalignment of the tray (20) on the respective support plate (9).
  2. Tray sealing machine according to claim 1, characterized in that the checking device (21) comprises a vacuum source (17) and at least one pressure gauge (16), wherein the checking device (21) is configured to suck a tray bottom (20a) of the tray (20) to the support plate (9) by means of vacuum, wherein the support plates (9) are located in a checking position.
  3. Tray sealing machine according to claim 2 characterized in that a control (18) is provided for detecting pressure values of the vacuum from the pressure gauge (16).
  4. Tray sealing machine according any of the preceding claims, characterized in that a or the control (18) is provided in order to move the support plates (9) by means of a lifting device (12) from a receiving position into a checking position.
  5. Tray sealing machine according to any of the preceding claims, characterized in that the support plates (9) comprise a circumferential sealing (13) on their upper sides (9a).
  6. Method for operation a tray sealing machine (1), comprising the following steps:
    - Feeding trays (20) by means of a gripper system (4) into a sealing station (2) comprising a sealing tool lower part (6),
    - Placing the trays (2) onto support trays (9) of the sealing tool lower part (6), wherein the support plates (9) are located in an upper receiving position,
    - Lowering the support plates (9) into a lower checking position,
    - Detecting a misalignment of each tray (20) on the respective support plate (9) by means of a checking device (21) of the support plate (9)
  7. Method according to claim 6, characterized in that a vacuum is applied to the upper side (9a) of the support plate (9), and subsequently a pressure value of the vacuum is detected.
  8. Method to any of claims 6 or 7, characterized in that the low pressure is detected by means of a pressure gauge (16) which is arranged in a line (15) between the support plate (9) and a vacuum source (17).
EP15160089.7A 2015-03-20 2015-03-20 Tray sealing machine Active EP3070012B1 (en)

Priority Applications (2)

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ES15160089.7T ES2664849T3 (en) 2015-03-20 2015-03-20 Tray sealing machine
EP15160089.7A EP3070012B1 (en) 2015-03-20 2015-03-20 Tray sealing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15160089.7A EP3070012B1 (en) 2015-03-20 2015-03-20 Tray sealing machine

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EP3070012B1 true EP3070012B1 (en) 2018-01-10

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Cited By (1)

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EP4253259A1 (en) * 2022-03-28 2023-10-04 Ulma Packaging, S.Coop. Control method for a thermo-sealing machine, and thermo-sealing machine

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Publication number Priority date Publication date Assignee Title
DE102018213213B4 (en) * 2018-08-07 2020-03-12 Multivac Sepp Haggenmüller Se & Co. Kg Method for operating a tray sealing machine
DE102019206209A1 (en) 2019-04-30 2020-11-05 Multivac Sepp Haggenmüller Se & Co. Kg TRAY SEALING MACHINE AND METHOD FOR GENTLY PICKING UP A TRAY
DE102019206389A1 (en) * 2019-05-03 2020-11-05 Multivac Sepp Haggenmüller Se & Co. Kg METHOD OF DETECTING TOOL MALFUNCTION AND PACKAGING MACHINE

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ITRE20060005A1 (en) * 2006-01-23 2007-07-24 Compac S R L THERMAL WELDING MACHINE TO WELD A COVER FILM ON THE PERIMETER EDGE OF TRAYS FOR PRODUCT PACKAGING.
EP1988024B2 (en) 2007-05-04 2017-05-24 GEA Food Solutions Germany GmbH Packaging machine with foreign substance detection
DE102011105513A1 (en) * 2011-06-24 2012-12-27 Multivac Sepp Haggenmüller Gmbh & Co. Kg Method and sealing station for sealing packaging
KR101201950B1 (en) * 2012-07-02 2012-11-16 오뚜기라면 주식회사 Packing apparatus for instant noodle and packing method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4253259A1 (en) * 2022-03-28 2023-10-04 Ulma Packaging, S.Coop. Control method for a thermo-sealing machine, and thermo-sealing machine
WO2023187232A1 (en) * 2022-03-28 2023-10-05 ULMA Packaging, S.Coop. Control method for a thermo-sealing machine and thermo-sealing machine

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ES2664849T3 (en) 2018-04-23

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