EP4249381A1 - Deep draw packaging machine with transverse cutting station - Google Patents
Deep draw packaging machine with transverse cutting station Download PDFInfo
- Publication number
- EP4249381A1 EP4249381A1 EP23153619.4A EP23153619A EP4249381A1 EP 4249381 A1 EP4249381 A1 EP 4249381A1 EP 23153619 A EP23153619 A EP 23153619A EP 4249381 A1 EP4249381 A1 EP 4249381A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- cross
- chamber
- packaging machine
- volume flow
- 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.)
- Pending
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- 238000005520 cutting process Methods 0.000 title claims abstract description 62
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 29
- 238000004080 punching Methods 0.000 claims abstract description 34
- 238000003856 thermoforming Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims description 22
- 238000007664 blowing Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 description 19
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
- B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
- B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
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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
- B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
- B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
- B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
- B65B61/065—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting by punching out
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1845—Means for removing cut-out material or waste by non mechanical means
- B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
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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
- B65B41/00—Supplying or feeding container-forming sheets or wrapping material
- B65B41/02—Feeding sheets or wrapper blanks
- B65B41/04—Feeding sheets or wrapper blanks by grippers
- B65B41/06—Feeding sheets or wrapper blanks by grippers by suction-operated grippers
-
- 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
- B65B41/00—Supplying or feeding container-forming sheets or wrapping material
- B65B41/12—Feeding webs from rolls
- B65B41/16—Feeding webs from rolls by rollers
-
- 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
- B65B47/04—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 by application of mechanical pressure
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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
- B65B57/00—Automatic control, checking, warning, or safety devices
-
- 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
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
- B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
Definitions
- the invention relates to a deep-drawing machine according to the preamble of claim 1.
- the invention further relates to a method according to independent claim 9.
- thermoforming packaging machines In thermoforming packaging machines, a trough is usually formed in a bottom film in a forming station, a product is inserted into it and the trough is sealed airtight in a sealing station with a top film under vacuum and/or a modified atmosphere.
- the packs produced in this way hang together as a composite over the bottom film and are transported through the thermoforming packaging machine by clip chains attached on both sides.
- a combination of a cross-cutting station with a subsequent longitudinal cutting station can be provided. In the cross-cutting station, the composite of the bottom and top films is cut transversely to the transport direction or, if radii are necessary at the edges of the packaging, strip cuts or so-called star cuts are cut out.
- the knife can, for example in the EP 3 088 315 A1 revealed, punching out the cutting waste coming from above and the cutting waste falls down. If there is not enough space for a device for collecting within the machine frame or for transporting it out of the machine frame, the punching knife can punch the cutting waste upwards, coming from below. These are then pushed further up in a receptacle after each cut and can then be collected and removed. In high-performance machines, the containers are very high so that they do not have to be constantly emptied.
- the cutting waste is pushed over a shoulder that is located above a film transport level and on which the last cut cutting waste partially rests with its edge, and this is intended to prevent the cutting waste stacked above from falling down into the cross-cutting station or onto the material to be cut Packaging falls. In the latter case, malfunctions would occur in the thermoforming packaging machine. Especially with thinner or non-rigid cutting waste, there is a high risk that the weight of the stacked cutting waste cannot be supported by the lowest cutting waste lying on top. A solution to this problem is presented in the EP 2 447 171 B1 suggested. A portion of the punching waste is safely carried using a slider in the cross-cutting station. This is particularly successful with strip cuts, but not reliable with star cuts. Another disadvantage is the mechanical design of the slide, which is complex and therefore expensive to produce and is subject to wear and requires regular maintenance.
- the object of the present invention is to provide a device that safely disposes of different cutting waste, such as strip cuts and star cuts, as well as different types of film, such as thin, non-rigid films and thick films.
- thermoforming packaging machine with the features of claim 1 or by a method for its operation according to independent claim 9.
- Advantageous developments of the invention are specified in the subclaims.
- the thermoforming packaging machine comprises at least one cross-cutting station, the cross-cutting station having a punching device in order to separate one or more film sections from a bottom film and/or a top film by means of a punching tool which comprises a punch and a die.
- the punching device has a chamber which is configured to, at least temporarily, hold the film sections to record, and a suction device to convey film sections out of the cross-cutting station, the suction device being fluidly connected to a source of compressed gas.
- Film sections are sections separated from the bottom and/or top film, which are also generally referred to as cutting waste. These can be so-called strip cuts, star cuts, euro holes or sections with other geometries.
- the suction device is designed as a volume flow amplifier into which a compressed gas can be blown using a compressed gas source.
- the compressed gas can be blown in through an annular gap.
- a volume flow amplifier is understood to mean a pipe arrangement that includes a first and a second pipe, which are arranged coaxially to one another and form a suction channel.
- the suction channel has a suction and an outlet side. Between the suction and outlet sides, the pipe arrangement has a thin annular gap through which a gas is introduced at very high speed.
- An opening or a plurality of openings that extend all the way around the suction channel can be viewed as an annular gap. It is also advantageous if a pressure regulator is used between the compressed gas source and the suction device in order to be able to set a desired pressure on the suction device. This can serve to limit the pressure applied to the suction device, thereby limiting the operating costs of the suction device and minimizing unwanted noise emissions.
- the punching device has a hood which forms the chamber, the chamber having at least two openings. It can also be useful if the hood is removably mounted on the punching device so that if the chamber becomes blocked by the punching waste, it can be easily removed by removing the hood.
- the first opening is formed by the die.
- the punch enters the die to cut out or punch out the film.
- the stamp almost completely closes the opening of the die.
- the opening of the die is released again when the punching process is completed and the punch has moved out of the die again.
- the movement of the stamp is often realized via a pneumatic drive. This requires a constant and high pressure from the compressed gas source to provide the necessary forces for the cutting process to create. If several compressed gas consumers are activated at the same time, pressure fluctuations in the compressed gas supply can occur, depending on the reliability of the compressed gas source. It is therefore expedient for the volume flow generated by the suction device to transport film sections out of the cross-cutting station to be interrupted during the cutting process.
- suction device forms the second opening of the chamber.
- the openings are an outlet opening through which the film sections are discharged from the chamber and an opening which is designed to ventilate the chamber.
- the ratio of the cross section of the chamber, viewed parallel to the transport direction, to the cross section of the suction device is between 0.5 and 1.5, preferably between 0.5 and 1.2, particularly preferably between 0.5 and 1 is.
- the flow velocity of the volume flow is influenced by the ratio of the cross sections of the suction device and chamber. The larger the cross section of the chamber is compared to the cross section of the suction device, the lower the flow velocity within the chamber. It is advantageous to achieve a high flow velocity in the chamber. It is particularly advantageous if the flow velocity in the suction device is slightly greater than in the chamber.
- a compressed gas connection is present at the end of the chamber opposite the suction device and/or a further opening is present, the opening cross section of which is preferably adjustable. If film sections are cut into strips, it can happen that they are only lifted on one side during suction and therefore get stuck in the die. It can happen that the strip cuts are first lifted out of the die on the side facing the suction device. As a result, a large part of the volume flow is directed at this point. On the side of the die facing away from the suction device, the volume flow may no longer be sufficient to transport the strip cut out of the die. Due to the hooked shape of the strip cuts, they do not come out of the die in such a case.
- the volume flow from this compressed gas connection can be used This ensures the removal of strip cuts.
- the further opening can also be formed by an area with a large number of small openings, such as a grid or a perforated plate.
- the volume flow can be influenced by adjusting the opening cross section of this additional opening. A small opening cross-section means that a larger proportion of the volume flow flows through the die and a smaller proportion of the volume flow flows through the wider opening - and vice versa.
- One embodiment of the invention provides that a deflection device is attached to the suction device, which is designed to direct film sections into a collecting container. This means that film sections can be transported directly out of the cross-cutting station without having to be guided through a hose. Due to this short path that the film sections travel during transport, the risk of film sections getting caught and causing a blockage is greatly reduced. This also makes the suction device easy to see and, should a blockage occur, easy to clean.
- the invention also includes a method for operating a thermoforming packaging machine.
- the device according to the invention is suitable, designed and configured for carrying out the method. Features described in relation to the device can be transferred to the method and vice versa.
- a method for operating a thermoforming packaging machine comprises a control and at least one cross-cutting station.
- the cross-cutting station has a punching device in order to separate one or more film sections from a bottom film and/or a top film by means of a punching tool which comprises a punch and a die.
- the method includes the following steps: At least one film section is separated from the bottom film and/or the top film using the punching tool, the at least one film section is at least temporarily accommodated in a chamber of the punching device and a volume flow is generated by means of a compressed gas source around the at least one film section out of the chamber of the cross-cutting station.
- an opening of the chamber is opened by moving the stamp out of the die. This enables the volume flow generated by the suction device to be directed through the die and thus specifically supports the removal of the cutting waste.
- the volume flow is generated by means of a volume flow amplifier by blowing gas, in particular compressed air, into a suction device.
- the generation of the volume flow is interrupted by the control at least for the duration of the punching process.
- the frequency, the duration and/or the intensity of the volume flow and/or the further volume flow can be adjusted based on an input by an operator on a human-machine interface and is determined by means of the human-machine interface. Interface communicates to a control of the thermoforming packaging machine.
- FIG. 1 shows schematically an embodiment of the thermoforming packaging machine 16 according to the invention.
- a bottom film 4 is transported along a transport direction T and connected to a top film 5.
- a cross-cutting station 1 cuts are made in the bottom film 4 and/or the top film 5.
- the thermoforming packaging machine 16 according to the invention has a human-machine interface 17 and a control 18.
- FIG 2 an embodiment of the cross-cutting station 1 of the thermoforming packaging machine 16 according to the invention can be seen.
- a punching device 2 is shown with a punching tool 6 in the open position.
- a stamp 7 is located outside or below a die 8.
- a hood 11 is attached to the punching device 2.
- the cutting waste or film sections 3 are collected in the collecting container 14.
- the suction device 10 is designed as a volume flow amplifier 10A.
- a compressed gas connection 24 can be seen on the volume flow amplifier 10A. Via this, the volume flow amplifier 10A is connected to the compressed gas source 19 through the compressed gas line 20.
- Figure 3 shows a sectional view of a cross-cutting station transverse to the transport direction T. It can be seen that the hood 11 forms a chamber 9.
- the chamber 9 of the cross-cutting station 1 has a total of three openings 12, 13 and 22.
- a film section 3 is located in the chamber 9. It can be transported out of the cross-cutting station 1 through the suction device 10 and thus through the opening 13. This is done by means of a volume flow V, which is generated by the suction device 10.
- This volume flow V2 can support the removal of the film sections 3. It is advantageous if the volume flow V2 is directed in the direction of the die 8. This specifically supports the removal of film sections 3 in the form of a strip cut, which could get caught in the die 8.
- Figure 4 shows a sectional view of the cross-cutting station 1 parallel to the transport direction T.
- the opening 12 of the die 8 widens upwards in this illustrated embodiment. This reduces the risk that cut film sections 3 become wedged in the die and the opening 12 becomes blocked with film sections 3.
- FIG. 5 a sectional view of the cross-cutting station 1 can be seen parallel to the transport direction T.
- the cross-sectional area A of the suction device 10 is shown hatched.
- FIG 6 a sectional view of the cross-cutting station 1 can be seen parallel to the transport direction T.
- the cross-sectional area B of the chamber 9 is shown hatched.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Details Of Cutting Devices (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Abstract
Die Erfindung bezieht sich auf eine Tiefziehverpackungsmaschine (16), umfassend wenigstens eine Querschneidestation (1), wobei die Querschneidestation (1) eine Stanzvorrichtung (2) aufweist, um einen oder mehrere Folienabschnitte (3) aus einer Unterfolie (4) und/oder einer Oberfolie (5) mittels eines Stanzwerkzeuges (6), welches einen Stempel (7) und eine Matrize (8) umfasst, herauszutrennen, wobei die Stanzvorrichtung (2) eine Kammer (9) aufweist, welche dazu konfiguriert ist, wenigstens temporär die Folienabschnitte (3) aufzunehmen, und eine Absaugvorrichtung (10) aufweist, um die Folienabschnitte (3) aus der Querschneidestation (1) herauszubefördern. Die Erfindung kennzeichnet sich dadurch aus, dass die Absaugvorrichtung (10) mit einer Druckgasquelle (19) fluidtechnisch verbunden ist. The invention relates to a thermoforming packaging machine (16), comprising at least one cross-cutting station (1), the cross-cutting station (1) having a punching device (2) in order to cut one or more film sections (3) from a bottom film (4) and/or a To separate out the upper film (5) by means of a punching tool (6), which comprises a punch (7) and a die (8), the punching device (2) having a chamber (9) which is configured to at least temporarily remove the film sections ( 3), and has a suction device (10) to transport the film sections (3) out of the cross-cutting station (1). The invention is characterized in that the suction device (10) is fluidly connected to a compressed gas source (19).
Description
Die Erfindung bezieht sich auf eine Tiefziehmaschine gemäß dem Oberbegriff des Anspruchs 1. Ferner betrifft die Erfindung ein Verfahren gemäß dem unabhängigen Anspruch 9.The invention relates to a deep-drawing machine according to the preamble of
In Tiefziehverpackungsmaschinen wird üblicherweise in einer Formstation in eine Unterfolie eine Mulde geformt, darin ein Produkt eingelegt und die Mulde in einer Siegelstation mit einer Oberfolie unter Vakuum und/oder modifizierter Atmosphäre luftdicht versiegelt. Die so hergestellten Packungen hängen als Verbund über die Unterfolie zusammen und werden durch beidseitig angebrachte Klammerketten durch die Tiefziehverpackungsmaschine transportiert. Zum Vereinzeln der Verpackungen aus dem Verbund der Unter- und der Oberfolie kann eine Kombination einer Querschneidestation mit einer nachfolgenden Längsschneidestation vorgesehen sein. In der Querschneidestation wird der Verbund der Unter- und der Oberfolie quer zur Transportrichtung geschnitten oder es werden, falls Radien an den Rändern der Verpackungen notwendig sind, Streifenschnitte oder sogenannte Sternschnitte herausgetrennt. Dabei kann das Messer, wie z.B. in der
Um unterschiedliche Geometrien an Schneidabfällen abzuführen schlägt die
Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung zur Verfügung zu stellen, die unterschiedliche Schneidabfälle, wie Streifenschnitte und Sternschnitte, sowie auch unterschiedliche Folientypen, wie dünne, nicht biegesteifen Folien, und dicke Folien sicher entsorgt. Zudem ist es Aufgabe der vorliegenden Erfindung eine verschleißfreie und wartungsarme Vorrichtung sowie eine zuverlässige und betriebskostenarme Vorrichtung zur Verfügung zu stellen. Zudem ist es Aufgabe der vorliegenden Erfindung ein Verfahren zu dem Betrieb dieser Vorrichtung zur Verfügung zu stellen.The object of the present invention is to provide a device that safely disposes of different cutting waste, such as strip cuts and star cuts, as well as different types of film, such as thin, non-rigid films and thick films. In addition, it is the object of the present invention to provide a wear-free and low-maintenance device as well as a reliable and low-cost device. It is also an object of the present invention to provide a method for operating this device.
Diese Aufgabe wird gelöst durch eine Tiefziehverpackungsmaschine mit den Merkmalen des Anspruchs 1 bzw. durch ein Verfahren zu deren Betrieb gemäß dem unabhängigen Anspruch 9. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by a thermoforming packaging machine with the features of
Die erfindungsgemäße Tiefziehverpackungsmaschine umfasst wenigstens eine Querschneidestation, wobei die Querschneidestation eine Stanzvorrichtung aufweist, um einen oder mehrere Folienabschnitte aus einer Unterfolie und/oder einer Oberfolie mittels eines Stanzwerkzeuges, welches einen Stempel und eine Matrize umfasst, herauszutrennen. Dabei weist die Stanzvorrichtung eine Kammer, welche dazu konfiguriert ist, wenigstens temporär, die Folienabschnitte aufzunehmen, und eine Absaugvorrichtung auf, um Folienabschnitte aus der Querschneidestation herauszubefördern, wobei die Absaugvorrichtung mit einer Durckgasquelle fluidtechnisch verbunden ist. Folienabschnitte sind von der Unter- und/oder Oberfolie abgetrennte Abschnitte, welche auch generell als Schneidabfall bezeichnet werden. Dies können sogenannte Streifenschnitte, Sternschnitte, Eurolöcher oder andere Geometrien aufweisende Abschnitte sein.The thermoforming packaging machine according to the invention comprises at least one cross-cutting station, the cross-cutting station having a punching device in order to separate one or more film sections from a bottom film and/or a top film by means of a punching tool which comprises a punch and a die. The punching device has a chamber which is configured to, at least temporarily, hold the film sections to record, and a suction device to convey film sections out of the cross-cutting station, the suction device being fluidly connected to a source of compressed gas. Film sections are sections separated from the bottom and/or top film, which are also generally referred to as cutting waste. These can be so-called strip cuts, star cuts, euro holes or sections with other geometries.
In einer bevorzugten Variante der erfindungsgemäßen Tiefziehverpackungsmaschine ist die Absaugvorrichtung als Volumenstromverstärker ausgebildet, in den mittels einer Druckgasquelle ein Druckgas einblasbar ist. In einer besonders vorteilhaften Ausführungsform der erfindungsgemäßen Tiefziehverpackungsmaschine ist das Druckgas durch einen Ringspalt einblasbar. Als Volumenstromverstärker wird hierbei eine Rohranordnung verstanden, die ein erstes und ein zweites Rohr umfasst, welche koaxial zueinander angeordnet sind und einen Saugkanal bilden. Der Saugkanal verfügt über eine Ansaug- und eine Austrittseite. Zwischen der Ansaug- und der Austrittsseite weist die Rohranordnung einen dünnen Ringspalt auf, durch den ein Gas mit sehr hoher Geschwindigkeit eingebracht wird. Dadurch wird an der Ansaugseite des Volumenstromverstärkers ein Unterdruck verursacht und dadurch Gas, beispielsweise Umgebungsluft, mitgerissen, sodass an der Austrittsseite ein verstärkter Volumenstrom austritt. Als Ringspalt kann eine Öffnung oder eine Vielzahl an Öffnungen angesehen werden, die sich umlaufend um den Saugkanal herum erstrecken. Vorteilhaft ist es zudem, wenn zwischen Druckgasquelle und Absaugvorrichtung ein Druckregler eingesetzt wird, um einen gewünschten Druck an der Absaugvorrichtung einstellen zu können. Dies kann dazu dienen, den Druck, der an der Absaugvorrichtung anliegt, zu begrenzen, um dadurch die Betriebskosten der Absaugvorrichtung zu begrenzen sowie die ungewünschten Schallemissionen zu minimieren.In a preferred variant of the thermoforming packaging machine according to the invention, the suction device is designed as a volume flow amplifier into which a compressed gas can be blown using a compressed gas source. In a particularly advantageous embodiment of the thermoforming packaging machine according to the invention, the compressed gas can be blown in through an annular gap. A volume flow amplifier is understood to mean a pipe arrangement that includes a first and a second pipe, which are arranged coaxially to one another and form a suction channel. The suction channel has a suction and an outlet side. Between the suction and outlet sides, the pipe arrangement has a thin annular gap through which a gas is introduced at very high speed. This causes a negative pressure on the suction side of the volume flow amplifier and thereby entrains gas, for example ambient air, so that an increased volume flow emerges on the outlet side. An opening or a plurality of openings that extend all the way around the suction channel can be viewed as an annular gap. It is also advantageous if a pressure regulator is used between the compressed gas source and the suction device in order to be able to set a desired pressure on the suction device. This can serve to limit the pressure applied to the suction device, thereby limiting the operating costs of the suction device and minimizing unwanted noise emissions.
Besonders vorteilhaft ist es, wenn die Stanzvorrichtung eine Haube aufweist, welche die Kammer bildet, wobei die Kammer mindestens zwei Öffnungen aufweist. Zweckmäßig kann es zudem sein, wenn die Haube abnehmbar auf der Stanzvorrichtung montiert ist, um bei eventuellen Verstopfungen der Kammer durch die Stanzabfälle diese, durch Abnehmen der Haube, leicht entfernen zu können.It is particularly advantageous if the punching device has a hood which forms the chamber, the chamber having at least two openings. It can also be useful if the hood is removably mounted on the punching device so that if the chamber becomes blocked by the punching waste, it can be easily removed by removing the hood.
In einer Weiterbildung der Erfindung ist es denkbar, dass die erste Öffnung durch die Matrize gebildet ist. Während des Schneidvorgangs tritt der Stempel in die Matrize ein, um die Folie herauszutrennen bzw. zu stanzen. Dabei verschließt der Stempel die Öffnung der Matrize nahezu vollständig. Die Öffnung der Matrize ist wieder freigegeben, wenn der Stanzvorgang abgeschlossen ist und der Stempel wieder aus der Matrize herausgefahren ist. Die Bewegung des Stempels wird häufig über einen pneumatischen Antrieb realisiert. Hierfür wird ein konstanter und hoher Druck durch die Druckgasquelle benötigt, um die erforderlichen Kräfte für den Schneidprozess zu erzeugen. Werden mehrere Druckgasverbraucher zeitgleich aktiviert, kann es je nach Zuverlässigkeit der Druckgasquelle zu Druckschwankungen der Druckgasversorgung kommen. Daher ist es zweckmäßig, dass der durch die Absaugvorrichtung erzeugte Volumenstrom zum Herausbefördern von Folienabschnitten aus der Querschneidestation während des Schneidprozesses unterbrochen wird.In a further development of the invention, it is conceivable that the first opening is formed by the die. During the cutting process, the punch enters the die to cut out or punch out the film. The stamp almost completely closes the opening of the die. The opening of the die is released again when the punching process is completed and the punch has moved out of the die again. The movement of the stamp is often realized via a pneumatic drive. This requires a constant and high pressure from the compressed gas source to provide the necessary forces for the cutting process to create. If several compressed gas consumers are activated at the same time, pressure fluctuations in the compressed gas supply can occur, depending on the reliability of the compressed gas source. It is therefore expedient for the volume flow generated by the suction device to transport film sections out of the cross-cutting station to be interrupted during the cutting process.
Vorteilhaft ist es, wenn die Absaugvorrichtung die zweite Öffnung der Kammer bildet.It is advantageous if the suction device forms the second opening of the chamber.
Bei den Öffnungen handelt es sich um eine Austrittsöffnung, durch welche die Folienabschnitte aus der Kammer ausgeschleust werden und um eine Öffnung, welche dazu ausgebildet ist, die Kammer zu belüften. Vorteilhaft an dieser Ausführungsform der vorliegenden Erfindung ist, dass der durch die Absaugvorrichtung erzeugte Volumenstrom von der Matrize durch die Kammer und durch die Absaugvorrichtung selbst strömt. Somit werden die erzeugten Schneidabfälle zuverlässig aus der Stanzvorrichtung hinausbefördert.The openings are an outlet opening through which the film sections are discharged from the chamber and an opening which is designed to ventilate the chamber. The advantage of this embodiment of the present invention is that the volume flow generated by the suction device flows from the die through the chamber and through the suction device itself. This means that the cutting waste generated is reliably transported out of the punching device.
Besonders vorteilhaft ist es, wenn das Verhältnis vom Querschnitt der Kammer, parallel zur Transportrichtung gesehen, zu dem Querschnitt der Absaugvorrichtung zwischen 0,5 und 1,5 liegt, bevorzugt zwischen 0,5 und 1,2 liegt, besonders bevorzugt zwischen 0,5 und 1 liegt. Durch das Verhältnis der Querschnitte von Absaugvorrichtung und Kammer wird die Strömungsgeschwindigkeit des Volumenstroms beeinflusst. Je größer der Querschnitt der Kammer im Vergleich zu dem Querschnitt der Absaugvorrichtung ist, desto geringer ist die Strömungsgeschwindigkeit innerhalb der Kammer. Vorteilhaft ist es, eine hohe Strömungsgeschwindigkeit in der Kammer zu erreichen. Besonders vorteilhaft ist es, wenn die Strömungsgeschwindigkeit in der Absaugvorrichtung etwas größer ist als in der Kammer.It is particularly advantageous if the ratio of the cross section of the chamber, viewed parallel to the transport direction, to the cross section of the suction device is between 0.5 and 1.5, preferably between 0.5 and 1.2, particularly preferably between 0.5 and 1 is. The flow velocity of the volume flow is influenced by the ratio of the cross sections of the suction device and chamber. The larger the cross section of the chamber is compared to the cross section of the suction device, the lower the flow velocity within the chamber. It is advantageous to achieve a high flow velocity in the chamber. It is particularly advantageous if the flow velocity in the suction device is slightly greater than in the chamber.
In einer Weiterbildung der Erfindung ist es denkbar, dass an dem der Absaugvorrichtung gegenüberliegenden Ende der Kammer ein Druckgasanschluss vorhanden ist und/oder eine weitere Öffnung vorhanden ist, deren Öffnungsquerschnitt vorzugsweise einstellbar ist. Liegen Folienabschnitte als Streifenschnitte vor, kann es vorkommen, dass diese beim Absaugen nur einseitig angehoben werden und daher in der Matrize hängen bleiben. Es kann passieren, dass die Streifenschnitte zuerst an der der Absaugvorrichtung zugewandten Seite aus der Matrize angehoben werden. Dadurch wird an dieser Stelle ein Großteil des Volumenstroms geleitet. An der von der Absaugvorrichtung abgewandten Seite der Matrize reicht dann unter Umständen der Volumenstrom nicht mehr aus, um den Streifenschnitt aus der Matrize herauszubefördern. Aufgrund der Hakenform der Streifenschnitte lösen sie sich in einem solchen Fall nicht aus der Matrize. Daher ist es vorteilhaft, einen Druckgasanschluss an der von der Absaugvorrichtung abgewandten Seite der Kammer vorzusehen. Über einen Volumenstrom aus diesem Druckgasanschluss kann der Abtransport von Streifenschnitten somit sichergestellt werden. Die weitere Öffnung kann auch durch ein Bereich mit einer Vielzahl an kleinen Öffnungen, wie z.B. ein Gitter oder ein Lochblech, ausgebildet sein. Durch Einstellen des Öffnungsquerschnitts dieser weiteren Öffnung lässt sich der Volumenstrom beeinflussen. Ein kleiner Öffnungsquerschnitt führt dazu, dass ein größerer Anteil des Volumenstroms durch die Matrize strömt und ein kleinerer Anteil des Volumenstroms durch die weitere Öffnung - und umgekehrt.In a further development of the invention, it is conceivable that a compressed gas connection is present at the end of the chamber opposite the suction device and/or a further opening is present, the opening cross section of which is preferably adjustable. If film sections are cut into strips, it can happen that they are only lifted on one side during suction and therefore get stuck in the die. It can happen that the strip cuts are first lifted out of the die on the side facing the suction device. As a result, a large part of the volume flow is directed at this point. On the side of the die facing away from the suction device, the volume flow may no longer be sufficient to transport the strip cut out of the die. Due to the hooked shape of the strip cuts, they do not come out of the die in such a case. It is therefore advantageous to provide a compressed gas connection on the side of the chamber facing away from the suction device. The volume flow from this compressed gas connection can be used This ensures the removal of strip cuts. The further opening can also be formed by an area with a large number of small openings, such as a grid or a perforated plate. The volume flow can be influenced by adjusting the opening cross section of this additional opening. A small opening cross-section means that a larger proportion of the volume flow flows through the die and a smaller proportion of the volume flow flows through the wider opening - and vice versa.
Eine Ausführungsform der Erfindung sieht vor, dass an der Absaugvorrichtung eine Umlenkvorrichtung angebracht ist, welche dazu ausgebildet ist, Folienabschnitte in einen Auffangbehälter zu lenken. Somit können Folienabschnitte direkt aus der Querschneidestation herausbefördert werden, ohne durch einen Schlauch geleitet werden zu müssen. Auf diesem kurzen Weg, den die Folienabschnitte während des Abtransports zurücklegen, ist das Risiko, dass sich Folienabschnitte verhaken und zu einer Verstopfung führen, stark reduziert. Zudem ist die Absaugvorrichtung dadurch gut einsehbar und, sollte es doch zu einer Verstopfung kommen, leicht zu reinigen.One embodiment of the invention provides that a deflection device is attached to the suction device, which is designed to direct film sections into a collecting container. This means that film sections can be transported directly out of the cross-cutting station without having to be guided through a hose. Due to this short path that the film sections travel during transport, the risk of film sections getting caught and causing a blockage is greatly reduced. This also makes the suction device easy to see and, should a blockage occur, easy to clean.
Die Erfindung umfasst auch ein Verfahren zum Betrieb einer Tiefziehverpackungsmaschine. Die erfindungsgemäße Vorrichtung ist zum Durchführen des Verfahrens geeignet, ausgelegt und konfiguriert. In Bezug auf die Vorrichtung beschriebene Merkmale lassen sich auf das Verfahren übertragen und umgekehrt.The invention also includes a method for operating a thermoforming packaging machine. The device according to the invention is suitable, designed and configured for carrying out the method. Features described in relation to the device can be transferred to the method and vice versa.
Ein erfindungsgemäßes Verfahren zum Betrieb einer Tiefziehverpackungsmaschine umfasst eine Steuerung und wenigstens eine Querschneidestation. Die Querschneidestation weist eine Stanzvorrichtung auf, um einen oder mehrere Folienabschnitte aus einer Unterfolie und/oder einer Oberfolie mittels eines Stanzwerkzeuges, welches einen Stempel und eine Matrize umfasst, herauszutrennen. Hierzu umfasst das Verfahren folgende Schritte: Wenigstens ein Folienabschnitt wird aus der Unterfolie und/oder der Oberfolie mittels des Stanzwerkzeuges herausgetrennt, der wenigstens eine Folienabschnitt wird wenigstens temporär in einer Kammer der Stanzvorrichtung aufgenommen und ein Volumenstrom wird mittels Druckgasquelle erzeugt, um den wenigstens einen Folienabschnitt aus der Kammer der Querschneidestation herauszubefördern.A method according to the invention for operating a thermoforming packaging machine comprises a control and at least one cross-cutting station. The cross-cutting station has a punching device in order to separate one or more film sections from a bottom film and/or a top film by means of a punching tool which comprises a punch and a die. For this purpose, the method includes the following steps: At least one film section is separated from the bottom film and/or the top film using the punching tool, the at least one film section is at least temporarily accommodated in a chamber of the punching device and a volume flow is generated by means of a compressed gas source around the at least one film section out of the chamber of the cross-cutting station.
Vorzugsweise wird im Verfahren eine Öffnung der Kammer durch Herausführen des Stempels aus der Matrize freigegeben. Die ermöglicht es, dass der durch die Absaugvorrichtung erzeugte Volumenstrom durch die Matrize geleitet wird und somit gezielt das Herausbefördern des Schneidabfalls unterstützt.Preferably, in the process, an opening of the chamber is opened by moving the stamp out of the die. This enables the volume flow generated by the suction device to be directed through the die and thus specifically supports the removal of the cutting waste.
In einer denkbaren Ausführung wird der Volumenstrom mittels eines Volumenstromverstärkers durch Einblasen von Gas, insbesondere Druckluft, in eine Absaugvorrichtung erzeugt.In a conceivable embodiment, the volume flow is generated by means of a volume flow amplifier by blowing gas, in particular compressed air, into a suction device.
Besonders zweckmäßig ist es, wenn der Folienabschnitt durch den Volumenstromverstärker hindurch befördert wird.It is particularly useful if the film section is conveyed through the volume flow amplifier.
In einer Weiterbildung des Verfahrens wird die Erzeugung des Volumenstroms mittels der Steuerung wenigstens für die Dauer des Stanzvorgangs unterbrochen.In a further development of the method, the generation of the volume flow is interrupted by the control at least for the duration of the punching process.
Des Weiteren ist es vorteilhaft, wenn im Verfahren ein weiterer Volumenstrom durch Einblasen von Gas, insbesondere Druckluft, in die Kammer erzeugt wird.Furthermore, it is advantageous if a further volume flow is generated in the process by blowing gas, in particular compressed air, into the chamber.
In einer besonders vorteilhaften Weiterbildung des Verfahrens kann, die Häufigkeit, die Dauer und/oder die Intensität des Volumenstroms und/oder des weiteren Volumenstroms aufgrund einer Eingabe durch einen Bediener an einer Mensch-Maschine-Schnittstelle angepasst werden und wird mittels der Mensch-Maschine-Schnittstelle an eine Steuerung der Tiefziehverpackungsmaschine kommuniziert.In a particularly advantageous development of the method, the frequency, the duration and/or the intensity of the volume flow and/or the further volume flow can be adjusted based on an input by an operator on a human-machine interface and is determined by means of the human-machine interface. Interface communicates to a control of the thermoforming packaging machine.
Im Folgenden wird ein vorteilhaftes Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher dargestellt. Im Einzelnen zeigen:
- Fig. 1
- eine schematische Ansicht einer Tiefziehverpackungsmaschine;
- Fig. 2
- eine schematische Perspektivansicht einer Querschneidestation;
- Fig. 3
- eine Schnittdarstellung der Querschneidestation quer zur Transportrichtung;
- Fig. 4
- eine Schnittdarstellung der Querschneidestation parallel zur Transportrichtung;
- Fig. 5
- eine Schnittdarstellung der Querschneidestation parallel zur Transportrichtung und
- Fig. 6
- eine Schnittdarstellung der Querschneidestation parallel zur Transportrichtung.
- Fig. 1
- a schematic view of a thermoforming packaging machine;
- Fig. 2
- a schematic perspective view of a cross-cutting station;
- Fig. 3
- a sectional view of the cross-cutting station transverse to the transport direction;
- Fig. 4
- a sectional view of the cross-cutting station parallel to the transport direction;
- Fig. 5
- a sectional view of the cross-cutting station parallel to the transport direction and
- Fig. 6
- a sectional view of the cross-cutting station parallel to the transport direction.
In
In
In
- 11
- QuerschneidstationCross cutting station
- 22
- StanzvorrichtungPunching device
- 33
- FolienabschnittSlide section
- 44
- UnterfolieBottom film
- 55
- OberfolieTop film
- 66
- Stanzwerkzeugpunching tool
- 77
- StempelRubber stamp
- 88th
- Matrizedie
- 99
- Kammerchamber
- 1010
- AbsaugvorrichtungSuction device
- 10A10A
- VolumenstromverstärkerVolume flow amplifier
- 1111
- HaubeHood
- 1212
- erste Öffnungfirst opening
- 1313
- zweite Öffnungsecond opening
- 1414
- AuffangbehälterCollection container
- 1515
- UmlenkvorrichtungDeflection device
- 1616
- TiefziehverpackungsmaschineThermoforming packaging machine
- 1717
- Mensch-Maschine-SchnittstelleHuman-machine interface
- 1818
- Steuerungsteering
- 1919
- DruckgasquelleCompressed gas source
- 2020
- DruckgasleitungCompressed gas line
- 2121
- DruckgasanschlussCompressed gas connection
- 2222
- weitere Öffnungfurther opening
- 2323
- RingspaltAnnular gap
- 2424
- DruckgasanschlussCompressed gas connection
- V, V2V, V2
- VolumenstromVolume flow
- TT
- TransportrichtungTransport direction
- AA
- Querschnittsfläche der AbsaugvorrichtungCross-sectional area of the suction device
- Bb
- Querschnittsfläche der KammerCross-sectional area of the chamber
Claims (15)
die Absaugvorrichtung (10) mit einer Druckgasquelle (19) fluidtechnisch verbunden ist.Thermoforming packaging machine (16), comprising at least one cross-cutting station (1), the cross-cutting station (1) having a punching device (2) for cutting one or more film sections (3) from a bottom film (4) and/or a top film (5) by means of a Punching tool (6), which comprises a punch (7) and a die (8), wherein the punching device (2) has a chamber (9) which is configured to at least temporarily accommodate the film sections (3), and a Has a suction device (10) to transport the film sections (3) out of the cross-cutting station (1), characterized in that
the suction device (10) is fluidly connected to a compressed gas source (19).
Applications Claiming Priority (1)
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DE102022104218.9A DE102022104218A1 (en) | 2022-02-23 | 2022-02-23 | Thermoforming packaging machine with cross cutting station |
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EP4249381A1 true EP4249381A1 (en) | 2023-09-27 |
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EP23153619.4A Pending EP4249381A1 (en) | 2022-02-23 | 2023-01-27 | Deep draw packaging machine with transverse cutting station |
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US (1) | US20230264846A1 (en) |
EP (1) | EP4249381A1 (en) |
CN (1) | CN219768498U (en) |
DE (1) | DE102022104218A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006001738B3 (en) * | 2006-01-13 | 2007-08-16 | Iwn Armaturen Dipl.-Ing. Wolfgang Niemann -Automationsarmaturen- E.K. | Suction unit collecting waste cuttings of sheet material from packing machine, comprises air-ejector inducing flow carrying waste through shredder into separation chamber |
DE102011100680A1 (en) * | 2011-05-06 | 2012-11-08 | Iwk Verpackungstechnik Gmbh | Transport device and method for removing cutting waste from a packaging machine |
DE202013006803U1 (en) * | 2013-07-29 | 2013-08-13 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Foil disposal unit for a packaging machine |
EP2447171B1 (en) | 2010-10-28 | 2013-10-02 | Multivac Sepp Haggenmüller GmbH & Co. KG | Deep draw packaging machine and method for operating the same |
EP3088315A1 (en) | 2015-04-30 | 2016-11-02 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Deep draw packaging machine with strip puncher |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102006020367A1 (en) | 2006-02-09 | 2007-08-16 | Cfs Germany Gmbh | Packaging machine has edge strip disposal device which consists of container with suction connector, suction fan, and rotationally driven knife arranged in container in region of outlet of suction connector |
DE102008015691B3 (en) | 2008-03-26 | 2010-04-15 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Apparatus and method for packaging products in bags |
-
2022
- 2022-02-23 DE DE102022104218.9A patent/DE102022104218A1/en active Pending
-
2023
- 2023-01-27 EP EP23153619.4A patent/EP4249381A1/en active Pending
- 2023-02-21 CN CN202320268705.6U patent/CN219768498U/en active Active
- 2023-02-23 US US18/113,152 patent/US20230264846A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006001738B3 (en) * | 2006-01-13 | 2007-08-16 | Iwn Armaturen Dipl.-Ing. Wolfgang Niemann -Automationsarmaturen- E.K. | Suction unit collecting waste cuttings of sheet material from packing machine, comprises air-ejector inducing flow carrying waste through shredder into separation chamber |
EP2447171B1 (en) | 2010-10-28 | 2013-10-02 | Multivac Sepp Haggenmüller GmbH & Co. KG | Deep draw packaging machine and method for operating the same |
DE102011100680A1 (en) * | 2011-05-06 | 2012-11-08 | Iwk Verpackungstechnik Gmbh | Transport device and method for removing cutting waste from a packaging machine |
DE202013006803U1 (en) * | 2013-07-29 | 2013-08-13 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Foil disposal unit for a packaging machine |
EP3088315A1 (en) | 2015-04-30 | 2016-11-02 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Deep draw packaging machine with strip puncher |
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CN219768498U (en) | 2023-09-29 |
US20230264846A1 (en) | 2023-08-24 |
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