EP2179927A2 - Seal system for packaging machine tools with integrated lifting rod - Google Patents
Seal system for packaging machine tools with integrated lifting rod Download PDFInfo
- Publication number
- EP2179927A2 EP2179927A2 EP09013242A EP09013242A EP2179927A2 EP 2179927 A2 EP2179927 A2 EP 2179927A2 EP 09013242 A EP09013242 A EP 09013242A EP 09013242 A EP09013242 A EP 09013242A EP 2179927 A2 EP2179927 A2 EP 2179927A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- seal
- sealing
- mold half
- lifting rod
- clamping plate
- 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.)
- Granted
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Classifications
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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
- B65B65/00—Details peculiar to packaging machines and not otherwise provided for; Arrangements of such details
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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
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
- B65B31/025—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers
- B65B31/028—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers closed by a lid sealed to the upper rim of the container, e.g. tray-like container
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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
- B65B7/164—Securing by heat-sealing
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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
- B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
Definitions
- the present invention relates to a sealing system for packaging machine tools with integrated lifting rod according to the preamble of claim 1.
- a hitherto known sealing system for packaging machine tools with integrated lifting rod has a first and a second mold half, which are movable relative to each other; the lift rod itself, which penetrates the first tool half in an axial direction and is movable in the axial direction; and a gasket sealing a gap between the first mold half and the lift rod.
- the seal has been designed as a vertical seal or as an axial seal.
- the vertical seal lacks a sufficient counterforce, so that the seal is insufficient in some cases.
- the axial seal is in danger of tilting the lifting rod. It would be conceivable to provide a special seal, but this would be associated with high costs and high costs.
- the solution according to the invention is preferably a simple but effective seal in the form of a silicone ring.
- the tolerances of the components in contact with the seal can be made larger. Due to the high axial closing forces between the clamping plate and the first mold half can thus act on the lifting rod high axial forces of the seal and ensure the seal for high negative pressures of up to 1 mbar in the chamber.
- a contact surface between the seal and the lifting rod can be increased, whereby the sealing effect is also enhanced.
- the lifting rod has a sealing bolt, which advantageously comes into contact with the seal only at the moment of the required sealing. If the seal is not compressed, no friction occurs between the lift rod and the seal, so that then the support plates can slide by their (low) weight to the bottom. For solutions with Simmerringen own holding or pulling device down would be necessary.
- the sealing bolt is realized directly under the support plate, which is lifted by the narrower, remaining lifting rod.
- the sealing bolt is detachably connected to the remaining lifting rod and can be separated from the support plate for easier assembly when changing tools.
- Embodiments of a sealing system according to the invention will be described for a tray sealing machine with reference to the figures, whereby the sealing system can of course also be applied in other packaging machines such as in a thermoforming machine.
- the Fig. 1 10 shows the tray sealing machine with a feed belt 20, one or more work stations 21 such as an evacuating, sealing and cutting station, a discharge belt 22, a machine frame 23, a film tensioning device 24, an operating device 25, a film feed roller 26 and a film remover 27.
- work stations 21 such as an evacuating, sealing and cutting station
- discharge belt 22 a discharge belt 22
- machine frame 23 a film tensioning device 24
- operating device 25 a film feed roller 26 and a film remover 27.
- packaging trays P On the feed belt 20 and the discharge belt 22 are packaging trays P (see Fig. 2 ) transported into the workstation 21 in and out of her.
- An upper film is fed to the work station 21 through the film feed roller 26 and is tensioned by the film tensioning device 24.
- the packaging tray P In the workstation 21, the packaging tray P is sealed with the top film.
- the interior of the packaging can be additionally evacuated and fumigated.
- the top film can also be cut in the workstation 21.
- the resulting film residue is wound on the Folienrestaufwickler 27 behind the workstation 21.
- the following is based on the FIGS. 2 to 5 a sealing station 21 as an example of a workstation 21 of the tray sealing machine of the Fig. 1 described.
- the sealing station 21 has a sealing system according to a first embodiment.
- the sealing system consists of a first mold half 1 and a second mold half 2, which are movable relative to each other.
- the first mold half 1 is a sealed lower part
- the second mold half 2 is a seal upper part.
- the sealing system is also formed by an integrated lifting rod 3, which penetrates the first tool half 1 in the axial direction and is movable in the axial direction.
- the lifting rod 3 carries a support plate 8 for packing trays P.
- a seal 4 is provided, which seals a gap 5 between the first mold half 1 and the lifting rod 3.
- the seal 4 has the form of a cylindrical ring with a rectangular profile cross section in the embodiments.
- the material of the seal 4 is made of silicone. Due to the shape of the cylindrical ring, the seal 4 has an inner diameter, which in the open position of the sealing station 21 according to the Fig. 2 larger than an outer diameter of the lifting rod 3. Thus, the gap 5 is clearly present between the lifting rod 3 and the seal 4.
- the present invention further provides an apparatus that compresses the gasket 4 in the axial direction so that the gasket 4 expands perpendicular to the axial direction and seals the gap 5.
- this device is realized by a clamping plate 6 which is movable in the axial direction relative to the first mold half 1.
- the clamping plate 6 is in particular in a recess 10 of the first mold half 1 slidably guided and centered, wherein the contour of the recess 10 is adapted to the circumference of the clamping plate 6.
- the seal 4 is arranged between the clamping plate 6 and a lower, extending perpendicular to the axial direction surface 7 of the first mold half 1.
- the clamping plate 6 has per seal 4, a cylindrical recess 11 in which the corresponding seal 4 is received, for example, with a clearance fit or transition fit.
- the axial length of the seal 4 is greater than the depth of the cylindrical recess 11 in the clamping plate 6. As a result, the seal 4 protrudes beyond the upper side of the clamping plate 6.
- the first tool half 1 rests on its lower surface 7 by its own weight on an upper surface of the seal 4.
- the lower side of the clamping plate 6 is connected to a lifting device 9, which raises the clamping plate 6 together with the first mold half 1.
- a lifting device 9 which raises the clamping plate 6 together with the first mold half 1.
- the gasket 4 is compressed (more precisely, the gasket 4 is compressed more compressed, since the gasket 4 through the weight of the first mold half 1 is already precompressed to some extent).
- the material of the seal 4 flows in a radical direction, and the seal 4 is radially expanded.
- the Fig. 2 shows a schematic sectional view of the sealing station 21 in the open position with the sealing system according to the first embodiment.
- the lifting device 9 has moved the first tool half 1 together with the clamping plate 6 upwards.
- the integrated lifting rods 3 are moved down.
- the Fig. 3 shows a schematic sectional view of the sealing station 21 in the half-open position with the sealing system according to the first embodiment.
- the lifting device 9 has moved the clamping plate 6 together with the first mold half 1 upwards and taken along the packing shells P, in particular on flanges 32 formed there. As a result, the packing trays P are separated from the backup plates 8.
- the lifting rods 3 can also move down.
- the Fig. 4 shows a schematic sectional view of the sealing station 21 in the closed, but not sealed position with the sealing system according to the first embodiment.
- the lifting device 9 has been moved so far up that the first mold half 1 begins to press against the second mold half 2.
- the shape of the seal 4 has not changed here.
- the Fig. 5 shows a schematic sectional view of the sealing station 21 in the closed and sealed position with the Sealing system according to the first embodiment.
- the lifting device 9 has pressed the clamping plate 6 with the first mold half 1 stronger upward.
- the clamping plate 6 was moved relative to the first mold half 1 and the seal 4 was compressed even more axially between the clamping plate 6 and the first mold half 1.
- Due to the elasticity of the seal 4 the material of the seal 4 flows radially into the remaining space between the inner periphery of the seal 4 and the lifting rod 3, so that the seal 4 is radially expanded.
- the gap 5 between the seal 4 and the lifting rod 3 is closed and sealed.
- the lifting device 9 presses the clamping plate 6 so high that the clamping plate 6, the lower surface 7 of the first mold half 1 touches. In this way, a stop is provided which adjusts the maximum compression of the seal 4 to a desired level.
- FIGS. 6 to 8 show a sealing station 21 according to a second embodiment. Similar or identical components to the first embodiment have the same reference numerals and will not be described again.
- the structure of the sealing system corresponds to the first embodiment with the following exception:
- the lifting rod 3a, 3b in the second embodiment has a sealing bolt 3a, which has a cylindrical shape with a diameter which is larger than a diameter of the remaining lifting rod 3b.
- the sealing bolt 3a has the task of cooperating with the seal 4 to seal the gap 5.
- the seal 4 is then compressed by the clamping plate 6, when the sealing bolt 3a of the seal 4 is opposite.
- the sealing bolt 3a is firmly connected to the support plate 8, and he has an axial bore 3e, in which the remaining lifting rod 3b is releasably inserted.
- the remaining lifting rod 3b in the second embodiment has in particular a pin 3g, which is releasably inserted into the axial bore 3e of the sealing bolt 3a, as shown in the Fig. 7 is clearly visible.
- the Fig. 6 shows a schematic sectional view of the sealing station 21 in the open position with the sealing system according to the second embodiment.
- the lifting device 9 has moved the first tool half 1 together with the clamping plate 6 upwards.
- the integrated lifting rods 3a, 3b are moved downwards, wherein the pin 3g of the remaining lifting rod 3b with the axial bore 3e of the sealing bolt 3a is engaged.
- the lower surface 7 of the first mold half 1 rests on the upper surface of the seal 4, so that the seal 4 is precompressed only by the weight of the first mold half 1.
- the gap 5 is formed.
- the Fig. 7 shows a schematic sectional view of the sealing station 21 in the half-open position with the sealing system according to the second embodiment.
- the lifting device 9 has moved the clamping plate 6 together with the first mold half 1 upwards and taken along the packing shells P in particular to the flanges 32 formed there. As a result, the packing trays P were separated from the backup plates 8, now inside the first mold half 1 rest.
- a special feature of the second embodiment is that the sealing bolt 3a separates from the remaining lifting rod 3b as soon as the support plates 8 rest inside the first tool half 1.
- the lifting rods 3 can also move downwards as in the first embodiment.
- the Fig. 8 shows a schematic sectional view of the sealing station 21 in the closed and sealing position with the sealing system according to the second embodiment.
- the lifting device 9 has pressed the clamping plate 6 with the first mold half 1 maximum upwards, so that the first mold half 1 presses against the second mold half 2.
- the clamping plate 6 was moved relative to the first mold half 1 and the seal 4 was compressed even more axially between the clamping plate 6 and the first mold half 1. Due to the elasticity of the seal 4, the material of the seal 4 flows radially into the remaining space between the inner periphery of the seal 4 and the lifting rod 3, more precisely between the inner periphery of the seal 4 and the sealing bolt 3a.
- the gap 5 between the gasket 4 and the sealing bolt 3a is closed and sealed.
- the lifting device 9 presses the clamping plate 6 so much upward that the clamping plate 6, the lower surface 7 of the first mold half 1 touches. In this way, a stop is provided which adjusts the maximum compression of the seal 4 to a desired level.
- Fig. 8 is also shown that the remaining lifting rod 3b has been moved back up, so that the pin 3g of the remaining lifting rod 3b in the axial bore 3e of the sealing bolt 3a is inserted. This serves to prepare for opening the mold halves 1, 2, when the support plate 8, the sealed packing shells P should wear again.
- FIGS. 9 to 11 show a sealing station 21 according to a third embodiment. Similar or identical components to the first embodiment have the same reference numerals and will not be described again.
- the structure of the sealing system corresponds to the second embodiment with the following exception that the sealing bolt 3c is not firmly connected to the support plate 8, but with the remaining lifting rod 3d.
- the sealing bolt 3 c has an axial bore 3 f, in which a pin 8 a of the support plate 8 is releasably inserted, as shown in particular in Fig. 10 is recognizable.
- FIGS. 9 to 11 Analogous to the FIGS. 6 to 8 of the second embodiment show the FIGS. 9 to 11 the operation of the third embodiment.
- the Fig. 9 shows a schematic sectional view of the sealing station 21 in the open position with the sealing system according to the third embodiment;
- the Fig. 10 shows a schematic sectional view of the sealing station 21 in the half-open position with the sealing system according to the third embodiment;
- the Fig. 11 shows a schematic sectional view of the sealing station 21 in the closed and sealed position with the sealing system according to the third embodiment.
- the seal 4 may have a conical shape on its inner circumference or the sealing bolts 3a, 3c on its outer circumference, so that tilting or jamming during insertion of the sealing bolt 3a, 3c into the seal 4 is avoided. At the same time, the sealing bolt 3a, 3c is better centered in the seal 4.
- the gasket 4 need not be formed as a cylindrical ring, but it may also be shaped as a torus with a round or elliptical profile cross-section.
- the axial length of the seal 4 is greater than the depth of the cylindrical recess 11 in the clamping plate 6, so that the seal 4 projects beyond the upper side of the clamping plate 6 also.
- This structure is not mandatory;
- the axial length of the gasket 4 may be smaller than the depth of the cylindrical recess 11 in the clamping plate 6, and on the lower surface 7 of the first mold half 1, a projection (not shown) may be formed, which penetrates into the recess 11 to to compress the gasket 4.
- a projection preferably has a ring-like shape adapted to the recess 11.
- the sealing system is not only applicable to tray sealing machines, but also to other packaging machines such as thermoforming machines.
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- Dispersion Chemistry (AREA)
- Package Closures (AREA)
- Sealing Devices (AREA)
- Closing Of Containers (AREA)
Abstract
Description
Die vorliegende Erfindung bezieht sich auf ein Dichtsystem für Verpackungsmaschinenwerkzeuge mit integrierter Hubstange gemäß dem Oberbegriff von Anspruch 1.The present invention relates to a sealing system for packaging machine tools with integrated lifting rod according to the preamble of
Ein bislang bekanntes Dichtsystem für Verpackungsmaschinenwerkzeuge mit integrierter Hubstange hat eine erste und eine zweite Werkzeughälfte, die relativ zueinander bewegbar sind; die Hubstange selbst, die die erste Werkzeughälfte in einer axialen Richtung durchdringt und in der axialen Richtung bewegbar ist; und eine Dichtung, die einen Spalt zwischen der ersten Werkzeughälfte und der Hubstange abdichtet.A hitherto known sealing system for packaging machine tools with integrated lifting rod has a first and a second mold half, which are movable relative to each other; the lift rod itself, which penetrates the first tool half in an axial direction and is movable in the axial direction; and a gasket sealing a gap between the first mold half and the lift rod.
Bisher wurde die Dichtung als Vertikaldichtung oder als Axialdichtung ausgeführt. Bei der Vertikaldichtung fehlt eine ausreichende Gegenkraft, so dass die Dichtung in einigen Fällen ungenügend ist. Bei der Axialdichtung besteht die Gefahr, dass sich die Hubstange verkantet. Es wäre denkbar, eine Sonderdichtung vorzusehen, was aber mit hohen Kosten und hohem Aufwand verbunden wäre.So far, the seal has been designed as a vertical seal or as an axial seal. The vertical seal lacks a sufficient counterforce, so that the seal is insufficient in some cases. The axial seal is in danger of tilting the lifting rod. It would be conceivable to provide a special seal, but this would be associated with high costs and high costs.
Es ist die Aufgabe der vorliegenden Erfindung, ein Dichtsystem für Verpackungsmaschinenwerkzeuge mit integrierter Hubstange vorzusehen, das für eine genügende Dichtfunktion sorgt, ein Verkanten der Hubstange verhindert und preiswert herzustellen ist.It is the object of the present invention to provide a sealing system for packaging machine tools with integrated lifting rod, which ensures a sufficient sealing function, prevents tilting of the lifting rod and is inexpensive to manufacture.
Diese Aufgabe wird durch das Dichtsystem für Verpackungsmaschinenwerkzeuge mit integrierter Hubstange mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.This object is achieved by the sealing system for packaging machine tools with integrated lifting rod with the features of
Bei der erfindungsgemäßen Lösung handelt es sich vorzugsweise um eine einfache aber wirkungsvolle Abdichtung in Form eines Silikonringes. Gegenüber üblichen Radialdichtungen, bei denen verschiebbare Wellen an der Innenseite laufen, können hier die Toleranzen der mit der Dichtung in Kontakt stehenden Bauteile größer gewählt werden. Durch die hohen axialen Schließkräfte zwischen der Klemmplatte und der ersten Werkzeughälfte können somit hohe axiale Kräfte der Dichtung auf die Hubstange wirken und die Abdichtung für hohe Unterdrücke von bis zu 1 mbar in der Kammer sicherstellen. Durch diese Ausführung kann auch eine Kontaktfläche zwischen Dichtung und Hubstange erhöht werden, wodurch die Dichtwirkung ebenfalls verstärkt wird.The solution according to the invention is preferably a simple but effective seal in the form of a silicone ring. Compared to conventional radial seals in which slidable shafts run on the inside, here the tolerances of the components in contact with the seal can be made larger. Due to the high axial closing forces between the clamping plate and the first mold half can thus act on the lifting rod high axial forces of the seal and ensure the seal for high negative pressures of up to 1 mbar in the chamber. By this embodiment, a contact surface between the seal and the lifting rod can be increased, whereby the sealing effect is also enhanced.
Vorzugsweise hat die Hubstange einen Dichtbolzen, der in vorteilhafter Weise nur im Moment der benötigten Abdichtung mit der Dichtung in Berührung gelangt. Wenn die Dichtung nicht komprimiert wird, tritt zwischen der Hubstange und der Dichtung keine Reibung auf, so dass dann die Stützteller durch ihr (geringes) Eigengewicht nach unten gleiten können. Bei Lösungen mit Simmerringen wäre eine eigene Halte- oder Zugvorrichtung nach unten notwendig.Preferably, the lifting rod has a sealing bolt, which advantageously comes into contact with the seal only at the moment of the required sealing. If the seal is not compressed, no friction occurs between the lift rod and the seal, so that then the support plates can slide by their (low) weight to the bottom. For solutions with Simmerringen own holding or pulling device down would be necessary.
Beim Wechseln von Werkzeugen ist ebenfalls die leichte De- und Montage von Vorteil; bei anderen Dichtsystemen muss aufgrund der engen Toleranzen beim Einbau darauf geachtet werden, dass die Dichtung nicht beschädigt wird, wenn der Dichtbolzen eingesetzt wird.When changing tools is also easy disassembly and assembly of advantage; For other sealing systems, care must be taken to ensure that the seal is not damaged when the sealing bolt is used due to the tight tolerances during installation.
Vorzugsweise ist bei der erfindungsgemäßen Lösung der Dichtbolzen direkt unter dem Stützteller realisiert, der durch die schmälere, restliche Hubstange angehoben wird. Der Dichtbolzen ist mit der restlichen Hubstange lösbar verbunden und kann für die einfachere Montage beim Werkzeugwechsel vom Stützteller getrennt werden.Preferably, in the solution according to the invention, the sealing bolt is realized directly under the support plate, which is lifted by the narrower, remaining lifting rod. The sealing bolt is detachably connected to the remaining lifting rod and can be separated from the support plate for easier assembly when changing tools.
Weitere Merkmale und Zweckmäßigkeiten der Erfindung ergeben sich aus der Beschreibung eines Ausführungsbeispiels anhand der beigefügten Zeichnungen.Further features and advantages of the invention will become apparent from the description of an embodiment with reference to the accompanying drawings.
Von den Figuren zeigen:
- Fig. 1
- eine schematische Ansicht einer Schalenverschließmaschine als Beispiel einer Verpackungsmaschine, bei der das Dichtsystem gemäß der vorliegenden Erfindung anwendbar ist;
- Fig. 2
- eine schematische Schnittansicht einer Siegelstation in geöffneter Stellung mit einem Dichtsystem gemäß einem ersten Ausführungsbeispiel;
- Fig. 3
- eine schematische Schnittansicht der Siegelstation in halb geöffneter Stellung mit dem Dichtsystem gemäß dem ersten Ausführungsbeispiel;
- Fig. 4
- eine schematische Schnittansicht der Siegelstation in geschlossener, aber nicht abgedichteten Stellung mit dem Dichtsystem gemäß dem ersten Ausführungsbeispiel;
- Fig. 5
- eine schematische Schnittansicht der Siegelstation in geschlossener und abgedichteten Stellung mit dem Dichtsystem gemäß dem ersten Ausführungsbeispiel;
- Fig. 6
- eine schematische Schnittansicht einer Siegelstation in geöffneter Stellung mit einem Dichtsystem gemäß einem zweiten Ausführungsbeispiel;
- Fig. 7
- eine schematische Schnittansicht der Siegelstation in halb geöffneter Stellung mit dem Dichtsystem gemäß dem zweiten Ausführungsbeispiel;
- Fig. 8
- eine schematische Schnittansicht der Siegelstation in geschlossener und abgedichteter Stellung mit dem Dichtsystem gemäß dem zweiten Ausführungsbeispiel
- Fig. 9
- eine schematische Schnittansicht einer Siegelstation in geöffneter Stellung mit einem Dichtsystem gemäß einem dritten Ausführungsbeispiel;
- Fig. 10
- eine schematische Schnittansicht der Siegelstation in halb geöffneter Stellung mit dem Dichtsystem gemäß dem dritten Ausführungsbeispiel; und
- Fig. 11
- eine schematische Schnittansicht der Siegelstation in geschlossener und abgedichteter Stellung mit dem Dichtsystem gemäß dem dritten Ausführungsbeispiel.
- Fig. 1
- a schematic view of a tray sealing machine as an example of a packaging machine, in which the sealing system according to the present invention is applicable;
- Fig. 2
- a schematic sectional view of a sealing station in the open position with a sealing system according to a first embodiment;
- Fig. 3
- a schematic sectional view of the sealing station in the half-open position with the sealing system according to the first embodiment;
- Fig. 4
- a schematic sectional view of the sealing station in the closed, but not sealed position with the sealing system according to the first embodiment;
- Fig. 5
- a schematic sectional view of the sealing station in the closed and sealed position with the sealing system according to the first embodiment;
- Fig. 6
- a schematic sectional view of a sealing station in the open position with a sealing system according to a second embodiment;
- Fig. 7
- a schematic sectional view of the sealing station in the half-open position with the sealing system according to the second embodiment;
- Fig. 8
- a schematic sectional view of the sealing station in the closed and sealed position with the sealing system according to the second embodiment
- Fig. 9
- a schematic sectional view of a sealing station in the open position with a sealing system according to a third embodiment;
- Fig. 10
- a schematic sectional view of the sealing station in the half-open position with the sealing system according to the third embodiment; and
- Fig. 11
- a schematic sectional view of the sealing station in the closed and sealed position with the sealing system according to the third embodiment.
Ausführungsbeispiele eines Dichtsystems gemäß der Erfindung werden für eine Schalenverschließmaschine (Traysealer) unter Bezugnahme auf die Figuren beschrieben, wobei das Dichtsystem selbstverständlich auch in anderen Verpackungsmaschinen wie zum Beispiel in einer Tiefziehmaschine angewendet werden kann.Embodiments of a sealing system according to the invention will be described for a tray sealing machine with reference to the figures, whereby the sealing system can of course also be applied in other packaging machines such as in a thermoforming machine.
Die
Auf dem Zuführband 20 und dem Abführband 22 werden Verpackungsschalen P (siehe
Im folgenden wird anhand der
In den folgenden Figuren sind jeweils zwei Verpackungsschalen P in Reihe dargestellt, die in einem Maschinentakt gleichzeitig versiegelt werden. In der Schnittansicht der Figuren sind daher zwei Dichtsysteme mit identischem Aufbau gezeigt, von denen nur eines beispielhaft mit Bezugszeichen versehen und beschrieben wird.In the following figures, two packaging trays P are shown in series, which are sealed simultaneously in one machine cycle. In the sectional view of the figures are therefore shown two sealing systems of identical construction, of which only one example provided with reference numerals and described.
Das Dichtsystem besteht aus einer ersten Werkzeughälfte 1 und einer zweiten Werkzeughälfte 2, die relativ zueinander bewegbar sind. Bei der Siegelstation 21 ist die erste Werkzeughälfte 1 ein Siegelunterteil, und die zweite Werkzeughälfte 2 ist ein Siegeloberteil. Das Dichtsystem wird außerdem durch eine integrierte Hubstange 3 gebildet, die die erste Werkzeughälfte 1 in der axialen Richtung durchdringt und in der axialen Richtung bewegbar ist. Die Hubstange 3 trägt einen Stützteller 8 für Packungsschalen P.The sealing system consists of a
Eine Dichtung 4 ist vorgesehen, die einen Spalt 5 zwischen der ersten Werkzeughälfte 1 und der Hubstange 3 abdichtet. Die Dichtung 4 hat bei den Ausführungsbeispielen die Form eines zylindrischen Rings mit rechteckigem Profilquerschnitt. Das Material der Dichtung 4 besteht aus Silikon. Aufgrund der Form des zylindrischen Rings hat die Dichtung 4 einen Innendurchmesser, der bei geöffneter Stellung der Siegelstation 21 gemäß der
Die vorliegenden Erfindung sieht des Weiteren eine Vorrichtung vor, die die Dichtung 4 in der axialen Richtung komprimiert, damit sich die Dichtung 4 senkrecht zur axialen Richtung ausdehnt und den Spalt 5 abdichtet. Bei dem gezeigten Ausführungsbeispiel ist diese Vorrichtung durch eine Klemmplatte 6 verwirklicht, die in der axialen Richtung relativ zu der ersten Werkzeughälfte 1 bewegbar ist. Die Klemmplatte 6 ist insbesondere in einer Ausnehmung 10 der ersten Werkzeughälfte 1 verschiebbar geführt und zentriert, wobei die Kontur der Ausnehmung 10 an den Umfang der Klemmplatte 6 angepasst ist.The present invention further provides an apparatus that compresses the
Die Dichtung 4 ist zwischen der Klemmplatte 6 und einer unteren, sich senkrecht zur axialen Richtung erstreckenden Fläche 7 der ersten Werkzeughälfte 1 angeordnet. Die Klemmplatte 6 hat pro Dichtung 4 eine zylindrische Ausnehmung 11, in der die entsprechende Dichtung 4 zum Beispiel mit einer Spielpassung oder Übergangspassung aufgenommen ist. Die axiale Länge der Dichtung 4 ist größer als die Tiefe der zylindrischen Ausnehmung 11 in der Klemmplatte 6. Dadurch ragt die Dichtung 4 über die obere Seite der Klemmplatte 6 hinaus. Die erste Werkzeughälfte 1 liegt an ihrer unteren Fläche 7 durch ihr Eigengewicht auf einer oberen Fläche der Dichtung 4 auf.The
Die untere Seite der Klemmplatte 6 ist mit einer Hubvorrichtung 9 verbunden, die die Klemmplatte 6 zusammen mit der ersten Werkzeughälfte 1 anhebt. Wenn die Klemmplatte 6 zusammen mit der ersten Werkzeughälfte 1 durch die Hubvorrichtung 9 soweit angehoben wird, dass die erste Werkzeughälfte 1 gegen die zweite Werkzeughälfte 2 drückt, wird die Dichtung 4 komprimiert (genauer gesagt wird die Dichtung 4 verstärkt komprimiert, da die Dichtung 4 durch das Gewicht der ersten Werkzeughälfte 1 bereits in gewissem Maß vorkomprimiert wird). Dadurch fließt das Material der Dichtung 4 in radikaler Richtung, und die Dichtung 4 wird radial gedehnt.The lower side of the
Der Betrieb des Dichtsystems gemäß dem ersten Ausführungsbeispiel wird anhand der
Die
In der geöffneten Stellung der Siegelstation 21, wie sie in der
Die
Die
Die
In den Ausführungsbeispielen drückt die Hubvorrichtung 9 die Klemmplatte 6 so stark nach oben, dass die Klemmplatte 6 die untere Fläche 7 der ersten Werkzeughälfte 1 berührt. Auf diese Weise wird ein Anschlag vorgesehen, der die maximale Komprimierung der Dichtung 4 auf ein gewünschtes Maß einstellt.In the embodiments, the
Die
Die Hubstange 3a, 3b bei dem zweiten Ausführungsbeispiel hat einen Dichtbolzen 3a, der eine zylindrische Form mit einem Durchmesser aufweist, der größer ist als ein Durchmesser der restlichen Hubstange 3b. Der Dichtbolzen 3a hat die Aufgabe, mit der Dichtung 4 zusammenzuwirken, um den Spalt 5 abzudichten. Dabei wird die Dichtung 4 durch die Klemmplatte 6 dann komprimiert, wenn der Dichtbolzen 3a der Dichtung 4 gegenüberliegt. Der Dichtbolzen 3a ist fest mit dem Stützteller 8 verbunden, und er hat eine axiale Bohrung 3e, in die die restliche Hubstange 3b lösbar einsteckbar ist. Die restliche Hubstange 3b beim zweiten Ausführungsbeispiel hat insbesondere einen Zapfen 3g, der in die axiale Bohrung 3e des Dichtbolzens 3a lösbar einsteckbar ist, wie dies in der
Der Betrieb des Dichtsystems gemäß dem zweiten Ausführungsbeispiel wird anhand der
Die
Die
Die
Auch hier drückt die Hubvorrichtung 9 die Klemmplatte 6 so stark nach oben, dass die Klemmplatte 6 die untere Fläche 7 der ersten Werkzeughälfte 1 berührt. Auf diese Weise wird ein Anschlag vorgesehen, der die maximale Komprimierung der Dichtung 4 auf ein gewünschtes Maß einstellt.Again, the
In der
Die
Analog zu den
Der Schutzumfang beschränkt sich nicht auf das dargestellte Ausführungsbeispiel, sondern er umfasst weitere Änderungen und Abwandlungen, sofern diese innerhalb des durch die beigefügten Ansprüche definierten Umfangs fallen.The scope of protection is not limited to the illustrated embodiment, but it includes other changes and modifications, provided that they fall within the scope defined by the appended claims.
Zum Beispiel kann die Dichtung 4 an ihrem Innenumfang oder der Dichtbolzen 3a, 3c an seinem Außenumfang eine konische Form aufweisen, so dass ein Verkanten oder Verklemmen beim Einführen des Dichtbolzens 3a, 3c in die Dichtung 4 vermieden wird. Gleichzeitig wird der Dichtbolzen 3a, 3c besser in der Dichtung 4 zentriert.For example, the
Die Dichtung 4 muss nicht als zylindrischer Ring geformt sein, sondern sie kann auch als Torus mit rundem oder elliptischem Profilquerschnitt geformt sein.The
Bei den gezeigten Ausführungsbeispielen ist die axiale Länge der Dichtung 4 größer als die Tiefe der zylindrischen Ausnehmung 11 in der Klemmplatte 6, so dass die Dichtung 4 über die obere Seite der Klemmplatte 6 hinaus ragt. Diese Struktur ist aber nicht zwingend; alternativ kann die axiale Länge der Dichtung 4 kleiner als die Tiefe der zylindrischen Ausnehmung 11 in der Klemmplatte 6 sein, und an der unteren Fläche 7 der ersten Werkzeughälfte 1 kann ein Vorsprung (nicht gezeigt) ausgebildet sein, der in die Ausnehmung 11 eindringt, um die Dichtung 4 zu komprimieren. Ein derartiger Vorsprung hat vorzugsweise eine an die Ausnehmung 11 angepasste, ringartige Form.In the embodiments shown, the axial length of the
Das Dichtsystem ist nicht nur bei Schalenverschließmaschinen anwendbar, sondern auch bei anderen Verpackungsmaschinen wie zum Beispiel bei Tiefziehmaschinen.The sealing system is not only applicable to tray sealing machines, but also to other packaging machines such as thermoforming machines.
Claims (12)
die Vorrichtung eine Klemmplatte (6) aufweist, die in der axialen Richtung relativ zu der ersten Werkzeughälfte (1) bewegbar ist; wobei
die Dichtung (4) zwischen der Klemmplatte (6) und einer Fläche (7) der ersten Werkzeughälfte (1) angeordnet ist, die sich senkrecht zu der axialen Richtung erstreckt; und
die Dichtung (4) komprimiert wird, wenn die Klemmplatte (6) zur ersten Werkzeughälfte (1) bewegt wird.Sealing system according to claim 2, wherein
the device comprises a clamping plate (6) movable in the axial direction relative to the first mold half (1); in which
the gasket (4) is disposed between the clamping plate (6) and a surface (7) of the first mold half (1) extending perpendicular to the axial direction; and
the seal (4) is compressed when the clamping plate (6) to the first tool half (1) is moved.
die Dichtung (4) die Form eines zylindrischen Rings hat.Sealing system according to one of the preceding claims, wherein
the seal (4) has the shape of a cylindrical ring.
die Dichtung (4) aus Silikon besteht.Sealing system according to one of the preceding claims, wherein
the seal (4) is made of silicone.
die Hubstange (3; 3a, 3b; 3c; 3d) einen Stützteller (8) für Packungen (9) trägt;
die Klemmplatte (6) mit einer Hubvorrichtung (9) verbunden ist, die die Klemmplatte (6) zusammen mit der ersten Werkzeughälfte (1) zur zweiten Werkzeughälfte (2) bewegt, wobei die Dichtung (4) komprimiert wird, wenn die erste Werkzeughälfte (1) gegen die zweite Werkzeughälfte (2) drückt.Workstation for a packaging machine with a sealing system according to one of claims 2 to 4, wherein
the lifting rod (3; 3a, 3b; 3c; 3d) carries a backing pad (8) for packages (9);
the clamping plate (6) is connected to a lifting device (9) which moves the clamping plate (6) together with the first mold half (1) to the second mold half (2), the seal (4) being compressed when the first mold half ( 1) presses against the second tool half (2).
die Hubstange (3a, 3b; 3c; 3d) einen Dichtbolzen (3a; 3c) aufweist, der eine zylindrische Form mit einem Durchmesser aufweist, der größer ist als ein Durchmesser der restlichen Hubstange (3b; 3d); und
die Dichtung (4) durch die Klemmplatte (6) komprimiert wird, wenn der Dichtbolzen (3a; 3c) der Dichtung (4) gegenüberliegt.Workstation according to claim 5, wherein
the lifting rod (3a, 3b; 3c; 3d) has a sealing bolt (3a; 3c) which has a cylindrical shape with a diameter which is larger than a diameter of the remaining lifting rod (3b; 3d); and
the seal (4) is compressed by the clamping plate (6) when the sealing bolt (3a; 3c) faces the seal (4).
der Dichtbolzen (3a) eine axiale Bohrung (3e) aufweist, in die die restliche Hubstange (3b) lösbar einsteckbar ist; und
der Dichtbolzen (3a) fest mit dem Stützteller (8) verbunden ist.Workstation according to claim 6, wherein
the sealing bolt (3a) has an axial bore (3e) into which the remaining lifting rod (3b) is releasably insertable; and
the sealing bolt (3a) is firmly connected to the support plate (8).
der Dichtbolzen (3c) eine axiale Bohrung (3f) aufweist, in die ein Zapfen (8a) des Stütztellers (8) lösbar einsteckbar ist; und
der Dichtbolzen (3c) fest mit der restlichen Hubstange (3d) verbunden ist.Workstation according to claim 6, wherein
the sealing bolt (3c) has an axial bore (3f) into which a pin (8a) of the support plate (8) can be detachably inserted; and
the sealing bolt (3c) is firmly connected to the remaining lifting rod (3d).
die erste Werkzeughälfte (1) ein Siegelunterteil und die zweite Werkzeughälfte (2) ein Siegeloberteil ist.Workstation according to one of claims 5 to 8, which is a sealing station (21) for a packaging machine, wherein
the first mold half (1) is a sealed bottom part and the second mold half (2) is a seal top part.
die erste Werkzeughälfte ein Formwerkzeugunterteil und die zweite Werkzeughälfte ein Formwerkzeugoberteil ist.Workstation according to one of claims 5 to 8, which is a thermoforming station for a packaging machine, wherein
the first mold half is a mold bottom and the second mold half is a mold top.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810052423 DE102008052423A1 (en) | 2008-10-21 | 2008-10-21 | Sealing system for packaging machine tools with integrated lifting rod |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2179927A2 true EP2179927A2 (en) | 2010-04-28 |
EP2179927A3 EP2179927A3 (en) | 2011-01-26 |
EP2179927B1 EP2179927B1 (en) | 2013-02-27 |
Family
ID=41664568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20090013242 Active EP2179927B1 (en) | 2008-10-21 | 2009-10-20 | Seal system for packaging machine tools with integrated lifting rod |
Country Status (3)
Country | Link |
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EP (1) | EP2179927B1 (en) |
DE (1) | DE102008052423A1 (en) |
ES (1) | ES2401559T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012107779A1 (en) * | 2011-02-11 | 2012-08-16 | Ishida Europe Limited | Container sealing apparatus |
US20130305661A1 (en) * | 2010-11-17 | 2013-11-21 | Bill Sorensen | Vacuum packaging machine |
KR102090396B1 (en) * | 2018-09-13 | 2020-03-17 | (주) 세창실업 | automatic sealing apparatus for container) |
EP4049937A1 (en) | 2021-02-24 | 2022-08-31 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Sealing station with lifting system |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011105513A1 (en) | 2011-06-24 | 2012-12-27 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Method and sealing station for sealing packaging |
DE102013214405B4 (en) * | 2013-07-23 | 2015-10-08 | Hdg Verpackungsmaschinen Gmbh | packaging machine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3663076A (en) | 1970-04-01 | 1972-05-16 | Hallite Holdings Ltd | Gland seal assemblies |
US4154044A (en) | 1976-08-11 | 1979-05-15 | Ludwig Schwerdtel Gmbh | Apparatus for sealing cans with lids under vacuum |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2680152B1 (en) * | 1991-08-09 | 1996-02-09 | Automatisme Assistance | DEVICE FOR VACUUM PACKAGING OF FOOD PRODUCTS. |
-
2008
- 2008-10-21 DE DE200810052423 patent/DE102008052423A1/en not_active Withdrawn
-
2009
- 2009-10-20 EP EP20090013242 patent/EP2179927B1/en active Active
- 2009-10-20 ES ES09013242T patent/ES2401559T3/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3663076A (en) | 1970-04-01 | 1972-05-16 | Hallite Holdings Ltd | Gland seal assemblies |
US4154044A (en) | 1976-08-11 | 1979-05-15 | Ludwig Schwerdtel Gmbh | Apparatus for sealing cans with lids under vacuum |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130305661A1 (en) * | 2010-11-17 | 2013-11-21 | Bill Sorensen | Vacuum packaging machine |
WO2012107779A1 (en) * | 2011-02-11 | 2012-08-16 | Ishida Europe Limited | Container sealing apparatus |
US9481479B2 (en) | 2011-02-11 | 2016-11-01 | Ishida Europe Limited | Container sealing apparatus |
KR102090396B1 (en) * | 2018-09-13 | 2020-03-17 | (주) 세창실업 | automatic sealing apparatus for container) |
EP4049937A1 (en) | 2021-02-24 | 2022-08-31 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Sealing station with lifting system |
Also Published As
Publication number | Publication date |
---|---|
EP2179927A3 (en) | 2011-01-26 |
DE102008052423A1 (en) | 2010-04-22 |
ES2401559T3 (en) | 2013-04-22 |
EP2179927B1 (en) | 2013-02-27 |
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