EP3041672B1 - Apparatus for producing bags - Google Patents

Apparatus for producing bags Download PDF

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Publication number
EP3041672B1
EP3041672B1 EP14761577.7A EP14761577A EP3041672B1 EP 3041672 B1 EP3041672 B1 EP 3041672B1 EP 14761577 A EP14761577 A EP 14761577A EP 3041672 B1 EP3041672 B1 EP 3041672B1
Authority
EP
European Patent Office
Prior art keywords
hose
fabric
pieces
hose pieces
station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14761577.7A
Other languages
German (de)
French (fr)
Other versions
EP3041672A1 (en
Inventor
Andreas LANKEMEYER
Klaus Ullmann
Andreas GRÜNBÖCK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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Publication date
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Publication of EP3041672A1 publication Critical patent/EP3041672A1/en
Application granted granted Critical
Publication of EP3041672B1 publication Critical patent/EP3041672B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/006—Controlling; Regulating; Measuring; Safety measures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/04—Feeding sheets or blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B31B2150/0014—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom having their openings facing transversally to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812—Applying patches, strips or strings on sheets or webs
    • B31B70/8122—Applying patches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/85—Applying patches or flexible valve inserts, e.g. applying film-like valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/92—Delivering
    • B31B70/98—Delivering in stacks or bundles

Definitions

  • the invention relates to a device for producing sacks of hose pieces according to the preamble of claim 1.
  • Such devices are known and available on the market for a long time.
  • these devices initially comprise a separating device in order to separate a supplied fabric hose, which may also be coated, into hose pieces.
  • hose pieces consist of two superposed material webs, which can each consist of several layers.
  • the tube is cyclically advanced in its longitudinal direction in each case by a length of hose piece.
  • a piece of hose is separated from the hose, so separated. This is usually done with a cutting tool such as a knife.
  • a cutting tool such as a knife.
  • each tube piece produced in this way is taken over by at least one transport device in order to transport it into the individual processing stations.
  • transverse direction is meant that the pieces of hose now be transported transversely to its longitudinal extent, to obtain in the further steps for the production of bags unhindered access to both ends of the hose pieces.
  • a previously separated piece of hose along its longitudinal axis by means of a suitable means of transport are guided to a pre-breaking station.
  • a forming die is lowered perpendicular to the transport direction of the hose pieces on the hose pieces.
  • the corner folds of the opened bottom of the sack, which is formed in the subsequent bottom opening station, are later located on the fold edge created.
  • a valve is placed on the open bottom on a bottom opening in the valve dispensing station. Through this valve, the bag is later filled with a suitable filling member.
  • a suction spreader system is used to place an open cross floor.
  • This comprises at least one revolving tool, in particular a pair of sickles, for spreading open the ends of the hose pieces which were previously opened over the suckers and for aligning the corner folds which thereby form.
  • the tool cuts out both the front and the rear pocket of the soil.
  • the operation of this suction spreader and in particular of the rotating tool, in particular sickle pair results from the DE 1 753 634 A ,
  • a piece of hose 1 is formed of a fabric of stretched plastic tape, which extends to the solid boundary lines 2. Beyond the boundary lines 2, the polymer extends in an edge region 3. The position of the Hose section within the device is determined by the outer edge of the polymer.
  • FIG. 1a the ideal case is shown in which the fabric corresponds exactly to the desired width and a uniform supernatant 3 is formed on both sides by the coating polymer.
  • the manufactured tube sections will often deviate from this ideal case. Different deviations are also in the FIG. 1 shown. That's how it shows FIG. 1b the condition in which the tissue is too wide.
  • the dashed line would be the ideal line in FIG. 1 is shown.
  • the solid line 2 shows the actual borderline of the ribbon fabric, which deviates from the ideal width.
  • a sucker spreader system is used to open the hose ends and form an open bottom square.
  • the setting of the spreading station depends on the hose width, more precisely on the fabric hose width without a laminate overhang, ie without a protrusion of the coating polymer. If there are fluctuations in the fabric hose width, as shown above with reference to the real pieces of hose originating from the production, the optimized setting is lost, whereby the quality of the opened bottom square suffers and leads to problems in the further processing. Also moving the fabric hose as in Figure 1d shown here can lead to corresponding problems.
  • this object is achieved by a device for producing sacks of hose pieces having the features of claim 1.
  • At least one sensor is arranged in the transport path, by means of which the exact position of at least one of the edges of the tube pieces formed by the tissue can be detected. Furthermore, means are provided which control the movement sequences in the at least one subsequent bottom opening station according to the detected position of the edge of the tube sections influence.
  • exactly the orientation of the edge region formed by the plastic ribbon fabric can be determined by means of a sensor. This position can be transmitted via suitable means of the subsequent floor opening station, there to tune the movements for opening the floor on the exact alignment of the edge formed by the plastic tape fabric.
  • the senor detects at least the position of the rear edge of the plastic ribbon fabric, wherein the movement of the rotating tools for spreading the previously opened ends of the hose pieces is adapted to the position of this edge.
  • the senor further recognizes the position of the front edge of the plastic ribbon fabric, wherein the movement of the rotating tools for spreading the previously opened ends of the hose pieces is adapted to the position of this edge.
  • the rotating tools for spreading the previously opened ends of the hose pieces are moved so that they first come into engagement with the front edge of the hose piece, this spreading, then in contact with the hose piece on this slide and then briefly come out of engagement with the hose piece before or in the area of the rear edge.
  • the tools are then moved so that they then slide into contact with the hose piece on this, at a speed which is below the transport speed of the hose pieces on the conveyor belt.
  • the rotating tools for spreading open the previously opened ends of the hose pieces with a predetermined speed profile emotional.
  • the speed profile can correspond to a uniform movement.
  • the velocity profile will provide different velocities, especially for the phases in which the tools are out of contact or in contact with a piece of tubing.
  • the movement profile of the rotating tools for spreading open the previously opened ends of the tube pieces to the position of the at least one edge of the plastic ribbon fabric is particularly preferably adapted.
  • the movement of the tools may be slowed down before they come into contact with the hose piece.
  • the front edge of the plastic ribbon fabric is in front of the normal position, the movement of the tools before they come into contact with the hose piece can be accelerated.
  • the at least one sensor above and / or below the transport path in the transport direction, which extends transversely to the extension direction of the hose piece, may be arranged.
  • Two sensors are particularly advantageously arranged next to one another such that they can detect a side edge of the tubular piece formed by the tissue. As a result, the exact alignment of the respective side edge formed by the ribbon fabric is detectable. With a corresponding passage of the hose can thus be accurately detected and the width of the hose.
  • the at least one sensor above and / or below the transport path in the transport direction, which runs along the direction of extension of the hose piece may be arranged.
  • two sensors may advantageously be arranged opposite one another in relation to the conveyed hose piece in such a way that they can detect the opposite side edges of the hose piece formed by the fabric.
  • the means for influencing the movements in the bottom opening station of actuators, via the motor, the movements of the tools necessary for the formation of the soil, in particular the rotating sickle pair are adapted to the exact detected position of the fabric edge of the tube section.
  • the movement generated by the actuators with the movement of another drive, which generates a drive movement of the necessary tools for forming the soil, in particular the rotating tools are superimposed, the further drive advantageously generates a nonuniform drive movement via a mechanical non-uniformity gear.
  • the means for influencing the movement sequences in the bottom opening station may consist of control commands which serve in a system control for the control of servomotors used as individual drives of the tools necessary for forming the bottom, in particular of the revolving sickle pair.
  • the invention makes use of the fact that, on the one hand, the plastic ribbon fabric is opaque, while the coating consisting of the polymer is translucent.
  • optical sensors are therefore used to detect the tissue edges. These advantageously have a light source and a light receiver, between which the pieces of tubing are passed, so as to accurately detect the side edges formed by the opaque plastic ribbon fabric.
  • a light source for the optical sensors are particularly suitable lasers with which the translucent polymer layer can be illuminated.
  • one or more capacitive and / or mechanical sensors may be used to detect the at least one edge of the plastic ribbon fabric.
  • the device according to the invention may have the components described in the introduction with respect to the prior art and / or be constructed and / or operated as described above with respect to the prior art.
  • means for adapting the length of the bottom cover sheets to the detected width of the fabric of the tube sections may be present.
  • the exact position of at least one of the edges of the hose pieces formed by the fabric is detected and the movement sequences for laying the open cross base are adapted to the detected position of the commercial edge.
  • the method is preferably carried out as already described in more detail above with regard to the device according to the invention.
  • a device may be used to carry out the method, as has been described above.
  • FIG. 1 schematically shows individual steps for processing a fabric tube 1 into sacks, as they take place in the sack manufacturing device 10 according to the invention.
  • the fabric tube 12 is fed to the sack manufacturing device 10. This is done in an advantageous manner by unwinding a fabric 14 forming a fabric tube in an unwinding 16. Subsequently, the tube 12 undergoes the so-called opening in the opening station 18. The fabric tube is guided around an inner tool, which separates the two layers from each other, so that the layers, if they were glued together in one of the manufacturing steps of the tube, separate. Only with separate layers can it be ensured that the following production steps can be carried out properly. Subsequently, the separate material layers of the hose are put back on top of each other.
  • the fabric tube is then fed to the cross-cutting device 20, which separates the fabric tube into individual tube pieces. Subsequently, a change of the original transport direction z, in which the hose or the hose pieces were transported in the direction of their longitudinal axes, in the new transport direction x, so that the hose pieces are now no longer transported in the direction of z tube longitudinal axis, but transversely thereto, so the ends of the pieces of tubing are laterally accessible for the purpose of forming the bottoms.
  • both ends of each tube piece are opened and the so-called bottom squares are laid.
  • a valve is placed on one of the two open ends and fastened.
  • the open floors are now closed in the bottom closing station 26, wherein two tabs are stacked. These can then be connected to each other permanently, for example by welding.
  • the completion of the actual sack manufacturing process forms the application of a bottom cover sheet on the floors in the cover sheet station 28.
  • the cover sheets can also be welded.
  • the finished bags are then placed on the one stack of sacks 30 and transported away from there on unspecified manner.
  • two optical sensors 32 and 34 are provided, via which the exact position of the edges of the plastic ribbon fabric (compare lines 2 in FIGS FIGS. 1 ) is determined.
  • the corresponding sensors 32 and 34 are arranged in the device 10 in the region of the edges of the tube pieces 1, while they are still transported in the direction z of their tube longitudinal axis.
  • the two respectively in the edge region of these pieces of hose opposite sensors so the exact positioning of the edges and thus the exact width of the hose pieces during transport of the hose pieces in the transport direction z are detected.
  • These data are forwarded to the actuators at the bottom opening station 22 in a manner not shown here.
  • the speed of the tool can be reduced or increased in dependence on the position of the rear edge of the fabric of a piece of hose determined by the sensor, while the tool is in contact with the piece of hose in order to adapt the tool movement to the position of the edge.
  • the speed of the tool can be reduced or increased depending on the determined by the sensor position of the front edge of the fabric of a piece of tubing before the tool comes into contact with the hose piece to adjust the tool movement to the position of the edge ,
  • FIG. 3 An alternative embodiment of the invention results from the FIG. 3 , There is a slightly modified device 10 is shown, but is constructed substantially similar. Here, the individual stations 40 are pulled apart to form the cross bottoms.
  • the piece of tubing 1 to be processed is conveyed in a manner not shown here, first in the direction of the arrow z, that is to say in the direction of the tube longitudinal axis.
  • the transport direction z in which the hose or the hose piece was conveyed, was changed to the new transport direction x.
  • two sensors 36 and 38 arranged next to one another are located above the transport plane of the hose piece 1 transported in the direction x.
  • the correspondingly suspended sensors detect the respective edge regions of the edges formed by the plastic ribbon fabric. In this case, the leading edge and the returning edge of the hose piece 1 are sequentially detected.
  • the resulting width and exact location can be passed to an actuator 42 of a bottom opening station 44.
  • the bottom opening stations 44 are not directly opposite, but offset from each other.
  • the respective bottoms are not formed simultaneously but offset from each other in the transport direction x. After formation of the respective bottoms 40 of the finished bag is detected by corresponding transport devices 46 and further transported to stack the bags in a manner not shown here.

Description

Die Erfindung betrifft eine Vorrichtung zur Herstellung von Säcken aus Schlauchstücken nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for producing sacks of hose pieces according to the preamble of claim 1.

Derartige Vorrichtungen sind bekannt und seit längerer Zeit am Markt erhältlich. Diese Vorrichtungen umfassen in der Regel zunächst eine Vereinzelungsvorrichtung, um einen zugeführten Gewebeschlauch, der zudem beschichtet sein kann, zu Schlauchstücken zu vereinzeln. Diese bestehen aus zwei übereinanderliegenden Materialbahnen, welche jeweils aus mehreren Schichten bestehen können. Dazu wird der Schlauch in seiner Längsrichtung taktweise jeweils um eine Schlauchstücklänge vorgezogen. Anschließend wird ein Schlauchstück von dem Schlauch vereinzelt, also abgetrennt. Dieses erfolgt in der Regel mit einem Schneidwerkzeug wie einem Messer. Jedoch sind auch andere Abtrennverfahren und die zugehörigen Einrichtungen bereits im Einsatz. Anschließend wird jedes auf diese Weise erzeugte Schlauchstück von zumindest einer Transportvorrichtung übernommen, um sie in die einzelnen Bearbeitungsstationen zu transportieren. Nach dem Abtrennen werden die Schlauchstücke also nicht mehr in Längsrichtung weitertransportiert, sondern in Querrichtung. Mit "Querrichtung" ist gemeint, dass die Schlauchstücke nunmehr quer zu ihrer Längserstreckung transportiert werden, um bei den weiteren Schritten zur Herstellung von Säcken ungehinderten Zugang zu beiden Enden der Schlauchstücke zu erhalten.Such devices are known and available on the market for a long time. As a rule, these devices initially comprise a separating device in order to separate a supplied fabric hose, which may also be coated, into hose pieces. These consist of two superposed material webs, which can each consist of several layers. For this purpose, the tube is cyclically advanced in its longitudinal direction in each case by a length of hose piece. Subsequently, a piece of hose is separated from the hose, so separated. This is usually done with a cutting tool such as a knife. However, other separation processes and associated equipment are already in use. Subsequently, each tube piece produced in this way is taken over by at least one transport device in order to transport it into the individual processing stations. After separation, the pieces of hose are therefore no longer transported in the longitudinal direction, but in the transverse direction. By "transverse direction" is meant that the pieces of hose now be transported transversely to its longitudinal extent, to obtain in the further steps for the production of bags unhindered access to both ends of the hose pieces.

Im Folgenden werden einzelne Stationen bei der Sackherstellung aufgeführt und deren Funktion erläutert:

  • In einer fakultativ vorhandenen Vorbruchstation werden Formstempel zur Erzeugung einer Falzlinie auf das Schlauchstück abgesenkt. Auf dieser Falzlinie befinden sich später die Eckeinschläge des geöffneten Schlauchbodens. Diese Formstempel können zu diesem Zweck auch beheizt werden.
  • In der Bodenöffnungsstation wird zumindest ein Ende eines Schlauchstücks aufgezogen, so dass an diesem aufgezogenen Ende ein Boden angeformt werden kann. Die Eckeinschläge befinden sich auf den Falzlinien des Schlauchstücks. Aufgrund ihrer geometrischen Form wird die Bodenöffnung auch Bodenöffnungsquadrat genannt. Dabei sei angemerkt, dass die Form nicht quadratisch, sondern in den meisten Fällen rechteckig ist. In der Regel werden beide Enden des Schlauchstücks auf die gleiche Weise bearbeitet.
  • In der Ventilzettelstation, auch als Ventilstation bezeichnet, wird ein Ventilzettel auf den zuvor geöffneten Boden des Schlauchstücks gelegt. Durch den Ventilzettel kann später der fertige Sack mit Hilfe eines geeigneten Füllstutzens befüllt werden.
  • In einer sogenannten Zulegestation, die auch als Bodenschließstation bezeichnet wird, werden Teile der Bodenöffnungen bzw. der Bodenöffnungsquadrate, die sogenannten Laschen, beidseitig zur Falzkante hin zurückgefaltet. Dabei können Bereiche dieser Lachen überlappen und diese überlappenden Bereiche dieser Laschen können miteinander verbunden werden.
  • Anschließend wird in der Bodendeckplattstation ein Bodendeckplatt mit der zugefalteten Bodenöffnung befestigt, beispielsweise verschweißt.
In the following, individual stations are listed during bag making and their function is explained:
  • In an optional pre-break station, dies are lowered onto the length of hose to create a fold line. On this fold line are later the corner impacts of the open tube bottom. These dies can also be heated for this purpose.
  • In the bottom opening station, at least one end of a piece of hose is pulled open, so that a bottom can be formed on this end being pulled up. The corner stops are located on the fold lines of the hose section. Due to its geometric shape, the bottom opening is also called floor opening square. It should be noted that the shape is not square, but in most cases rectangular. In general, both ends of the hose piece are processed in the same way.
  • In the valve dispensing station, also referred to as valve station, a valve leaflet is placed on the previously opened bottom of the tube piece. Through the valve leaflet, the finished bag can later be filled with the aid of a suitable filler neck.
  • In a so-called Zulegestation, which is also referred to as bottom closing station, parts of the bottom openings or the bottom opening squares, the so-called tabs, folded back on both sides of the folded edge. In this case, areas of these pools can overlap and these overlapping areas of these tabs can be interconnected.
  • Subsequently, a Bodendeckplatt is attached with the folded bottom opening in the ground cover station, for example, welded.

Hier ist anzumerken, dass nicht alle der aufgezählten Stationen in einer Vorrichtung zur Herstellung von Säcken vorhanden sein müssen. So kann auf eine Vorbruchstation verzichtet werden. Auch Bodendeckblätter müssen nicht immer aufgebracht werden, um einen Sack zu fertigen. Gleichwohl sind weitere Stationen denkbar.It should be noted that not all of the enumerated stations must be present in a sack making apparatus. So can be dispensed with a pre-break station. Even ground cover sheets do not always have to be applied to make a sack. Nevertheless, further stations are conceivable.

Mit der bekannten Vorrichtung kann ein zuvor vereinzeltes Schlauchstück entlang seiner Längsachse mit Hilfe eines geeigneten Transportmittels, beispielsweise einem Doppelwandförderer, zu einer Vorbruchstation geführt werden. Dort wird ein Formstempel senkrecht zur Transportrichtung der Schlauchstücke auf die Schlauchstücke abgesenkt. Auf der dabei entstandenen Falzkante befinden sich später die Eckeinschläge des geöffneten Sackbodens, der in der darauffolgenden Bodenöffnungsstation geformt wird. Anschließend wird auf einer Bodenöffnung in der Ventilzettelstation ein Ventil auf den geöffneten Boden gelegt. Durch dieses Ventil wird später der Sack mit einem geeigneten Füllorgan befüllt. In der folgenden Zulegestation wird die Bodenöffnung des Sackes zugefaltet, so dass anschließend in der Bodendeckblattstation durch Verschweißen der Bodenöffnung desselben mit einem Bodendeckblatt der Sack fertiggestellt wird. Da die bekannten Vorrichtungen sowohl auf der Bedien- wie auch auf der Antriebsseite nahezu gleich aufgebaut sind, um gleichzeitig beide Enden des Schlauchstücks bearbeiten zu können, wurde in der vorangegangenen Beschreibung nicht auf die verschiedenen Maschinenseiten eingegangen.With the known device, a previously separated piece of hose along its longitudinal axis by means of a suitable means of transport, such as a double wall conveyor, are guided to a pre-breaking station. There, a forming die is lowered perpendicular to the transport direction of the hose pieces on the hose pieces. The corner folds of the opened bottom of the sack, which is formed in the subsequent bottom opening station, are later located on the fold edge created. Subsequently, a valve is placed on the open bottom on a bottom opening in the valve dispensing station. Through this valve, the bag is later filled with a suitable filling member. In the following Zulegestation the bottom opening of the bag is folded, so that subsequently in the ground cover sheet station by welding the bottom opening thereof with a bottom cover sheet of the bag is completed. Since the known devices are constructed on both the operating and on the drive side almost the same to simultaneously edit both ends of the hose piece, was not discussed in the foregoing description on the various machine pages.

Aus der EP 2 441 574 A1 ist eine Vorrichtung zur Herstellung von Säcken aus Schlauchstücken mit den wesentlichen Merkmalen des Oberbegriffs des Anspruchs 1 bekannt.From the EP 2 441 574 A1 a device for producing sacks of pieces of hose with the essential features of the preamble of claim 1 is known.

Um nun qualitativ hochwertige Säcke zu produzieren, ist es insbesondere wichtig, dass die Schlauchstücke kantengerade und ohne Versatz in Transportrichtung von der Quertransportvorrichtung, welche die Schlauchstück zu den einzelnen Bearbeitungsstationen befördert, übernommen werden. "Kantengerade" bedeutet, dass die vordere und die rückwärtige Kante des Schlauchstücks orthogonal zur Transportrichtung verlaufen. Eine genau definierte Übergabe der Schlauchstücke ist insbesondere im Bereich der Bodenöffnungsstation, in dem das geöffnete Bodenquadrat gebildet wird, von besonderer Bedeutung.In order to produce high-quality bags, it is particularly important that the pieces of tubing edge straight and without offset in the transport direction of the cross-transport device, which the piece of hose to the individual processing stations be taken over. "Edge straight" means that the leading and trailing edges of the length of tubing are orthogonal to the direction of transport. A precisely defined transfer of the tube pieces is particularly important in the area of the bottom opening station in which the opened bottom square is formed.

In der Bodenöffnungsstation wird zum Legen eines offenen Kreuzbodens ein Sauger- Spreizersystem eingesetzt. Dieses umfasst mindestens ein umlaufendes Werkzeug, insbesondere ein Sichelpaar, zum Aufspreizen der zuvor über die Sauger geöffneten Enden der Schlauchstücke und zum Ausrichten der sich dabei bildenden Eckeinschläge. Das Werkzeug streicht dabei sowohl die vordere als auch die hintere Tasche des Bodens aus. Die Funktionsweise dieses Sauger- Spreizersystems und insbesondere des umlaufenden Werkzeuges, insbesondere Sichelpaars ergibt sich aus der DE 1 753 634 A .In the floor opening station, a suction spreader system is used to place an open cross floor. This comprises at least one revolving tool, in particular a pair of sickles, for spreading open the ends of the hose pieces which were previously opened over the suckers and for aligning the corner folds which thereby form. The tool cuts out both the front and the rear pocket of the soil. The operation of this suction spreader and in particular of the rotating tool, in particular sickle pair results from the DE 1 753 634 A ,

In den vorgenannten Vorrichtungen werden vorzugsweise Schlauchstücke verarbeitet, die aus Geweben aus gereckten Kunststoffbändchen bestehen, wobei diese Gewebe zwei übereinanderliegende Materiallagen bilden. Häufig sind derartige Gewebe noch beschichtet. Dabei ist es beispielsweise bekannt geworden, Gewebe mit einer Beschichtung aus einem Polymer zu versehen. Die Gewebe selbst bestehen hier häufig aus Polymer-, insbesondere Polyolefin-, Polypropylen-, Polyethylen-(HDPE) oder Polyethylenterephthalatbändchen, die vorzugsweise monoaxial verstreckt sind. Das Gewebe kann dabei als Schlauch gewebt sein. Dieses Gewebe ist mit einer Beschichtung versehen, die aus einem Polymer, insbesondere Polyolefin oder Polypropylen gebildet ist. Das Polymer wird dabei auf das Gewebe vollflächig aufgebracht, wobei beim Herstellprozess das die Beschichtung bildende Polymer einen Überstand über die aus dem Gewebe gebildeten Materiallagen bildet.In the aforementioned devices preferably pieces of tubing are processed, which consist of woven fabrics of stretched plastic tapes, these fabrics form two superposed layers of material. Frequently such fabrics are still coated. It has become known, for example, to provide tissue with a coating of a polymer. The fabrics themselves often consist of polymer, in particular polyolefin, polypropylene, polyethylene (HDPE) or polyethylene terephthalate, which are preferably monoaxially stretched. The fabric can be woven as a tube. This fabric is provided with a coating which is formed from a polymer, in particular polyolefin or polypropylene. The polymer is applied over the entire surface of the fabric, wherein during the manufacturing process, the polymer forming the coating forms a supernatant over the layers of material formed from the fabric.

Dies wird anhand der Figur 1 beispielsweise in der Darstellung Figur 1a dargestellt. Hier ist ein Schlauchstück 1 aus einem Gewebe aus gereckten Kunststoffbändchen gebildet, das bis zu den durchgezogenen Grenzlinien 2 verläuft. Über die Grenzlinien 2 hinaus erstreckt sich das Polymer in einem Randbereich 3. Die Position des Schlauchstücks innerhalb der Vorrichtung wird dabei durch die äußere Kante des Polymers bestimmt.This is based on the FIG. 1 for example, in the illustration FIG. 1a shown. Here, a piece of hose 1 is formed of a fabric of stretched plastic tape, which extends to the solid boundary lines 2. Beyond the boundary lines 2, the polymer extends in an edge region 3. The position of the Hose section within the device is determined by the outer edge of the polymer.

In Figur 1a ist der Idealfall gezeigt, in dem das Gewebe genau der gewünschten Breite entspricht und ein gleichmäßiger Überstand 3 auf beiden Seiten durch das beschichtende Polymer gebildet wird. In der Realität werden die hergestellten Schlauchabschnitte allerdings von diesem Idealfall häufig abweichen. Verschiedene Abweichungen sind ebenfalls in der Figur 1 dargestellt. So zeigt die Figur 1b den Zustand, in dem das Gewebe zu breit ist. Die gestrichelte Linie wäre die Ideallinie, die in Figur 1 dargestellt ist. Die durchgezogene Linie 2 zeigt allerdings die tatsächliche Grenzlinie des Bändchengewebes, die von der Idealbreite abweicht.In FIG. 1a the ideal case is shown in which the fabric corresponds exactly to the desired width and a uniform supernatant 3 is formed on both sides by the coating polymer. In reality, however, the manufactured tube sections will often deviate from this ideal case. Different deviations are also in the FIG. 1 shown. That's how it shows FIG. 1b the condition in which the tissue is too wide. The dashed line would be the ideal line in FIG. 1 is shown. The solid line 2, however, shows the actual borderline of the ribbon fabric, which deviates from the ideal width.

In Figur 1c ist der umgekehrte Fall gezeigt, in der die tatsächliche Breite des Bändchengewebes, welches durch die durchgezogene Linie 2 angezeigt ist, zu schmal ist. Schließlich ergibt sich aus der Figur 1d eine von dem Idealfall abweichende Ausgestaltung eines Schlauchstücks 1, bei dem das Gewebe und die von diesem gebildeten Grenzen 2 gegenüber der Ideallinie, die durch die strichlierte Linie gezeigt ist, seitlich versetzt ist.In Figure 1c the reverse case is shown in which the actual width of the ribbon fabric indicated by the solid line 2 is too narrow. Finally, it follows from the Figure 1d a deviating from the ideal embodiment of a piece of tubing 1, in which the fabric and the boundaries formed by this 2 with respect to the ideal line, which is shown by the dashed line, laterally offset.

Wie bereits zuvor ausgeführt wurde, wird in der Bodenöffnungsstation ein Sauger-Spreizersystem eingesetzt, um die Schlauchenden zu öffnen und ein geöffnetes Bodenquadrat zu bilden. Die Einstellung der Spreizerstation ist unter anderem abhängig von der Schlauchbreite, genauer von der Gewebeschlauchbreite ohne Laminatüberstand, d. h. ohne Überstand des beschichtenden Polymer. Kommt es nun zu Schwankungen der Gewebeschlauchbreite, wie zuvor anhand der realen aus der Fertigung stammenden Schlauchstücke gezeigt, verliert man die optimierte Einstellung, wobei die Qualität des geöffneten Bodenquadrats leidet und zu Problemen in der weiteren Verarbeitung führt. Auch ein Verschieben des Gewebeschlauchs, wie in Figur 1d gezeigt, kann hier zu entsprechenden Problemen führen.As previously stated, in the bottom opening station, a sucker spreader system is used to open the hose ends and form an open bottom square. Among other things, the setting of the spreading station depends on the hose width, more precisely on the fabric hose width without a laminate overhang, ie without a protrusion of the coating polymer. If there are fluctuations in the fabric hose width, as shown above with reference to the real pieces of hose originating from the production, the optimized setting is lost, whereby the quality of the opened bottom square suffers and leads to problems in the further processing. Also moving the fabric hose as in Figure 1d shown here can lead to corresponding problems.

Aufgabe der vorliegenden Erfindung ist es nun, eine Vorrichtung zur Herstellung von Säcken aus Schlauchstücken nach dem Oberbegriff des Anspruchs 1 derart weiterzubilden, dass insbesondere die Qualität bei der Sackherstellung und hier insbesondere bei der Bildung des geöffneten Bodenquadrats auch bei variierender Qualität des zugeführten aus dem beschichteten Kunststoffbändchengewebe bestehenden Schlauchstück verbessert wird.Object of the present invention, it is now an apparatus for producing sacks of hose pieces according to the preamble of claim 1 such to further develop that in particular the quality of the bag production and here in particular in the formation of the open bottom square is improved even with varying quality of the supplied from the coated plastic ribbon fabric hose piece.

Erfindungsgemäß wird diese Aufgabe durch eine Vorrichtung zur Herstellung von Säcken aus Schlauchstücken mit den Merkmalen des Anspruchs 1 gelöst.According to the invention, this object is achieved by a device for producing sacks of hose pieces having the features of claim 1.

Demnach ist erfindungsgemäß eine Vorrichtung zur Herstellung von Säcken aus Schlauchstücken, welche Gewebe aus gereckten Kunststoffbändchen umfassen, geschaffen, wobei das Gewebe mit einer Beschichtung aus einem Polymer versehen ist. Diese Vorrichtung umfasst:

  • zumindest eine Transporteinrichtung zum Transportieren der Schlauchstücke entlang eines Transportweges in einer Transportrichtung (x), die quer zu ihrer Erstreckungsrichtung (z) verläuft, wobei die Schlauchstücke vorteilhafterweise in horizontaler Lage förderbar sind,
  • zumindest eine Bodenöffnungsstation zum Legen eines offenen Kreuzbodens mit mindestens einem umlaufenden Werkzeug, insbesondere einem Sichelpaar, zum Aufspreizen der zuvor geöffneten Enden der Schlauchstücke und zum Ausrichten der sich dabei bildenden Eckeinschläge,
  • wahlweise zumindest eine Ventilstation,
  • zumindest eine Bodenschließstation und
  • wahlweise zumindest eine Deckblattstation.
Accordingly, according to the invention, there is provided an apparatus for producing sacks of pieces of tubing comprising stretched-tape webs, the fabric being provided with a coating of a polymer. This device comprises:
  • at least one transport device for transporting the hose pieces along a transport path in a transport direction (x) which runs transversely to its direction of extent (z), wherein the hose pieces can advantageously be conveyed in a horizontal position,
  • at least one bottom opening station for laying an open cross base with at least one revolving tool, in particular a sickle pair, for spreading open the previously opened ends of the hose pieces and for aligning the corner folds forming thereby,
  • optionally at least one valve station,
  • at least one bottom closing station and
  • optionally at least one cover sheet station.

Im Transportweg ist mindestens ein Sensor angeordnet, mittels dem die genaue Lage mindestens einer der durch das Gewebe gebildeten Kanten der Schlauchstücke erfassbar ist. Des Weiteren sind Mittel vorgesehen, die die Bewegungsabläufe in der mindestens einen nachfolgenden Bodenöffnungsstation entsprechend der erfassten Lage der Kante der Schlauchabschnitte beeinflussen.At least one sensor is arranged in the transport path, by means of which the exact position of at least one of the edges of the tube pieces formed by the tissue can be detected. Furthermore, means are provided which control the movement sequences in the at least one subsequent bottom opening station according to the detected position of the edge of the tube sections influence.

Erfindungsgemäß kann mittels eines Sensors genau die Ausrichtung des von dem Kunststoffbändchengewebe gebildeten Randbereichs ermittelt werden. Diese Lage kann über geeignete Mittel der nachfolgenden Bodenöffnungsstation übermittelt werden, um dort die Bewegungsabläufe zur Öffnung des Bodens auf die genaue Ausrichtung der durch das Kunststoffbändchengewebe gebildeten Kante abzustimmen.According to the invention, exactly the orientation of the edge region formed by the plastic ribbon fabric can be determined by means of a sensor. This position can be transmitted via suitable means of the subsequent floor opening station, there to tune the movements for opening the floor on the exact alignment of the edge formed by the plastic tape fabric.

In einer bevorzugten Ausgestaltung erkennt der Sensor dabei mindestens die Lage der hinteren Kante des Kunststoffbändchengewebes, wobei die Bewegung der umlaufenden Werkzeuge zum Aufspreizen der zuvor geöffneten Enden der Schlauchstücke an die Lage dieser Kante angepasst wird.In a preferred embodiment, the sensor detects at least the position of the rear edge of the plastic ribbon fabric, wherein the movement of the rotating tools for spreading the previously opened ends of the hose pieces is adapted to the position of this edge.

Alternativ oder zusätzlich erkennt der Sensor weiterhin die Lage der vorderen Kante des Kunststoffbändchengewebes, wobei die Bewegung der umlaufenden Werkzeuge zum Aufspreizen der zuvor geöffneten Enden der Schlauchstücke an die Lage dieser Kante angepasst wird.Alternatively or additionally, the sensor further recognizes the position of the front edge of the plastic ribbon fabric, wherein the movement of the rotating tools for spreading the previously opened ends of the hose pieces is adapted to the position of this edge.

Dabei kann vorgesehen sein, dass die umlaufenden Werkzeuge zum Aufspreizen der zuvor geöffneten Enden der Schlauchstücke so bewegt werden, so dass sie zunächst mit der vorderen Kante des Schlauchstücks in Eingriff kommen, dieses Aufspreizen, daraufhin in Kontakt mit dem Schlauchstück über dieses gleiten und dann kurz vor oder im Bereich der hinteren Kante außer Eingriff mit dem Schlauchstück kommen. Insbesondere werden die Werkezeuge dabei, damit sie daraufhin in Kontakt mit dem Schlauchstück über dieses gleiten, mit einer Geschwindigkeit bewegt, welche unter der Transportgeschwindigkeit der Schlauchstücke auf dem Transportband liegt.It can be provided that the rotating tools for spreading the previously opened ends of the hose pieces are moved so that they first come into engagement with the front edge of the hose piece, this spreading, then in contact with the hose piece on this slide and then briefly come out of engagement with the hose piece before or in the area of the rear edge. In particular, the tools are then moved so that they then slide into contact with the hose piece on this, at a speed which is below the transport speed of the hose pieces on the conveyor belt.

Insbesondere werden die umlaufenden Werkzeuge zum Aufspreizen der zuvor geöffneten Enden der Schlauchstücke dabei mit einem vorgegebenen Geschwindigkeitprofil bewegt. In einem Sonderfall kann das Geschwindigkeitsprofil dabei einer gleichförmigen Bewegung entsprechen. Üblicherweise wird das Geschwindigkeitsprofil jedoch unterschiedliche Geschwindigkeiten insbesondere für die Phasen vorsehen, in welchen die Werkzeuge außer Kontakt bzw. in Kontakt mit einem Schlauchstück stehen.In particular, the rotating tools for spreading open the previously opened ends of the hose pieces with a predetermined speed profile emotional. In a special case, the speed profile can correspond to a uniform movement. Usually, however, the velocity profile will provide different velocities, especially for the phases in which the tools are out of contact or in contact with a piece of tubing.

Besonders bevorzugt wird dabei erfindungsgemäß das Bewegungsprofil der umlaufenden Werkzeuge zum Aufspreizen der zuvor geöffneten Enden der Schlauchstücke an die Lage der mindestens einen Kante des Kunststoffbändchengewebes angepasst.According to the invention, the movement profile of the rotating tools for spreading open the previously opened ends of the tube pieces to the position of the at least one edge of the plastic ribbon fabric is particularly preferably adapted.

Befindet sich die hintere Kante des Kunststoffbändchengewebes dabei hinter der Normalposition, so kann die Bewegung der Werkzeuge, während diese in Kontakt mit dem Schlauchstück sind, verlangsamt werden. Befindet sich die hintere Kante des Kunststoffbändchengewebes dagegen vor der Normalposition, so kann die Bewegung der Werkzeuge, während diese in Kontakt mit dem Schlauchstück sind, beschleunigt werden.If the rear edge of the plastic ribbon fabric is behind the normal position, the movement of the tools while they are in contact with the piece of tubing can be slowed down. On the other hand, if the trailing edge of the plastic ribbon fabric is in front of the normal position, movement of the tools while in contact with the piece of tubing may be accelerated.

Befindet sich die vordere Kante des Kunststoffbändchengewebes dabei hinter der Normalposition, so kann die Bewegung der Werkzeuge, bevor diese in Kontakt mit dem Schlauchstück kommen, verlangsamt werden. Befindet sich die vordere Kante des Kunststoffbändchengewebes dagegen vor der Normalposition, so kann die Bewegung der Werkzeuge, bevor diese in Kontakt mit dem Schlauchstück kommen, beschleunigt werden.If the front edge of the plastic ribbon fabric is behind the normal position, the movement of the tools may be slowed down before they come into contact with the hose piece. On the other hand, if the front edge of the plastic ribbon fabric is in front of the normal position, the movement of the tools before they come into contact with the hose piece can be accelerated.

Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den sich an den Hauptanspruch anschließenden Unteransprüchen.Further preferred embodiments of the invention will become apparent from the subsequent claims to the main claim.

Demnach kann der mindestens eine Sensor oberhalb und/oder unterhalb des Transportweges in der Transportrichtung, die quer zur Erstreckungsrichtung des Schlauchstückes verläuft, angeordnet sein.Accordingly, the at least one sensor above and / or below the transport path in the transport direction, which extends transversely to the extension direction of the hose piece, may be arranged.

Besonders vorteilhaft sind zwei Sensoren derart nebeneinander angeordnet, dass sie eine durch das Gewebe gebildete Seitenkante des Schlauchsstückes erfassen können. Hierdurch ist die genaue Ausrichtung der jeweiligen durch das Bändchengewebe gebildeten Seitenkante erfassbar. Bei entsprechendem Durchlauf des Schlauchs kann damit auch die Breite des Schlauches genau erfasst werden.Two sensors are particularly advantageously arranged next to one another such that they can detect a side edge of the tubular piece formed by the tissue. As a result, the exact alignment of the respective side edge formed by the ribbon fabric is detectable. With a corresponding passage of the hose can thus be accurately detected and the width of the hose.

Gemäß einer alternativen Ausgestaltung kann der mindestens eine Sensor oberhalb und/oder unterhalb des Transportweges in der Transportrichtung, die längs zur Erstreckungsrichtung des Schlauchstückes verläuft, angeordnet sein. In dieser Ausgestaltung können vorteilhaft zwei Sensoren derart bezogen auf das geförderte Schlauchstück gegenüberliegend angeordnet sein, dass sie die durch das Gewebe gebildeten gegenüberliegenden Seitenkanten des Schlauchstückes erfassen können.According to an alternative embodiment, the at least one sensor above and / or below the transport path in the transport direction, which runs along the direction of extension of the hose piece, may be arranged. In this embodiment, two sensors may advantageously be arranged opposite one another in relation to the conveyed hose piece in such a way that they can detect the opposite side edges of the hose piece formed by the fabric.

Gemäß einer besonderen Ausgestaltung der Erfindung bestehen die Mittel zur Beeinflussung der Bewegungsabläufe in der Bodenöffnungsstation aus Stellantrieben, über die motorisch die Bewegungsabläufe der zur Bildung des Bodens notwendigen Werkzeuge, insbesondere des umlaufenden Sichelpaares an die exakt erfasste Lage der Gewebekante des Schlauchabschnitts anpassbar sind.
Dabei kann die durch die Stellantriebe erzeugte Bewegung mit der Bewegung eines weiteren Antriebs, welcher eine Antriebsbewegung der zur Bildung des Bodens notwendigen Werkzeuge, insbesondere die umlaufenden Werkzeuge, erzeugt, überlagert werden, wobei der weitere Antrieb vorteilhafterweise über ein mechanisches Ungleichförmigkeitsgetriebe eine ungleichförmige Antriebsbewegung erzeugt.According to a particular embodiment of the invention, the means for influencing the movements in the bottom opening station of actuators, via the motor, the movements of the tools necessary for the formation of the soil, in particular the rotating sickle pair are adapted to the exact detected position of the fabric edge of the tube section.
In this case, the movement generated by the actuators with the movement of another drive, which generates a drive movement of the necessary tools for forming the soil, in particular the rotating tools, are superimposed, the further drive advantageously generates a nonuniform drive movement via a mechanical non-uniformity gear.

Alternativ können die Mittel zur Beeinflussung der Bewegungsabläufe in der Bodenöffnungsstation aus Steuerbefehlen bestehen, die in einer Anlagensteuerung zur Ansteuerung von als Einzelantrieben der zur Bildung des Bodens notwendigen Werkzeuge, insbesondere des umlaufenden Sichelpaares, verwendeten Servomotoren dienen.Alternatively, the means for influencing the movement sequences in the bottom opening station may consist of control commands which serve in a system control for the control of servomotors used as individual drives of the tools necessary for forming the bottom, in particular of the revolving sickle pair.

In einer vorteilhaften Ausgestaltung mach sich die Erfindung zunutze, dass einerseits das Kunststoffbändchengewebe opak ist, während die aus dem Polymer bestehende Beschichtung transluzent ist.Gemäß einer bevorzugten Ausgestaltung der vorliegenden Erfindung werden zum Erkennen der Gewebekanten daher optische Sensoren verwendet. Diese weisen vorteilhaft eine Lichtquelle und einen Lichtempfänger auf, zwischen denen die Schlauchstücke hindurch geführt werden, um so die durch das opake Kunststoffbändchengewebe gebildeten Seitenkanten exakt zu erfassen. Als Lichtquelle für die optischen Sensoren eignen sich insbesondere Laser, mit denen die transluzente Polymerschicht durchleuchtet werden kann.In an advantageous embodiment, the invention makes use of the fact that, on the one hand, the plastic ribbon fabric is opaque, while the coating consisting of the polymer is translucent. According to a preferred embodiment of the present invention, optical sensors are therefore used to detect the tissue edges. These advantageously have a light source and a light receiver, between which the pieces of tubing are passed, so as to accurately detect the side edges formed by the opaque plastic ribbon fabric. As a light source for the optical sensors are particularly suitable lasers with which the translucent polymer layer can be illuminated.

Alternativ oder zusätzlich können zum Erkennen der mindestens einen Kante des Kunststoffbändchengewebe auch einer oder mehere kapazitive und/oder mechanische Sensoren zum Einsatz kommen.Alternatively or additionally, one or more capacitive and / or mechanical sensors may be used to detect the at least one edge of the plastic ribbon fabric.

In einer bevorzugten Ausgestaltung der Erfindung kann die erfindungsgemäße Vorrichtung dabei die eingangs im Hinblick auf den Stand der Technik beschriebenen Komponenten aufweisen und/oder wie eingangs im Hinblick auf den Stand der Technik beschrieben aufgebaut sein und/oder betrieben werden.In a preferred embodiment of the invention, the device according to the invention may have the components described in the introduction with respect to the prior art and / or be constructed and / or operated as described above with respect to the prior art.

Darüber hinausgehend können erfindungsgemäß Mittel zur Anpassung der Länge der Bodendeckblätter an die erfasste Breite des Gewebes der Schlauchabschnitte vorhanden sein.In addition, according to the invention, means for adapting the length of the bottom cover sheets to the detected width of the fabric of the tube sections may be present.

Die vorliegende Erfindung umfasst weiterhin ein Verfahren zur Herstellung von Säcken aus Schlauchstücken, welche Gewebe aus gereckten Kunststoffbändchen umfassen, wobei das Gewebe mit einer Beschichtung aus einem Polymer versehen ist, mit den Schritten:

  • Übergeben der Schlauchstücke an eine Transporteinrichtung,
  • kontinuierliches und bevorzugt gleichförmiges Transportieren der Schlauchstücke entlang eines Transportweges in einer Transportrichtung (x), die quer zu der Erstreckungsrichtung (z) und parallel zur der Breitenrichtung der Schlauchstücke verläuft, wobei die Schlauchstücke vorteilhafterweise in horizontaler Lage transportiert werden,
  • Legen eines offenen Kreuzbodens mit mindestens einem umlaufenden Werkzeug durch Aufspreizen der zuvor geöffneten Enden der Schlauchstücke und durch Ausrichten der sich dabei bildenden Eckeinschläge,
  • wahlweise Auflegen eines Ventilzettels,
  • Schließen des Bodens und
  • wahlweise Auflegen eines Bodendeckblattes.
The present invention further includes a method of making sacks from lengths of tubing comprising stretched plastic ribbon fabrics, the fabric being provided with a coating of a polymer, comprising the steps of:
  • Transferring the hose pieces to a transport device,
  • continuous and preferably uniform transport of the tube pieces along a transport path in a transport direction (x) which extends transversely to the direction of extent (z) and parallel to the width direction of the tube pieces, the tube pieces advantageously being transported in a horizontal position,
  • Laying an open cross base with at least one rotating tool by spreading open the previously opened ends of the hose pieces and by aligning the thereby forming corner impacts,
  • optionally placing a valve leaflet,
  • Closing the floor and
  • optionally placing a ground cover sheet.

Erfindungsgemäß ist dabei vorgesehen, dass die genaue Lage mindestens einer der durch das Gewebe gebildeten Kanten der Schlauchstücke erfasst wird und die Bewegungsabläufe zum Legen des offenen Kreuzbodens an die erfasste Lage der Gewerbekante angepasst werden.According to the invention, it is provided that the exact position of at least one of the edges of the hose pieces formed by the fabric is detected and the movement sequences for laying the open cross base are adapted to the detected position of the commercial edge.

Bevorzugt wird das Verfahren dabei so durchgeführt, wie dies bereits oben im Hinblick auf die erfindungsgemäße Vorrichtung näher dargestellt ist.In this case, the method is preferably carried out as already described in more detail above with regard to the device according to the invention.

Insbesondere kann zur Durchführung des Verfahrens eine Vorrichtung zum Einsatz kommen, wie sie oben beschrieben wurde.In particular, a device may be used to carry out the method, as has been described above.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den in der Zeichnung dargestellten Ausführungsbeispielen. Es zeigen:

Figur 1:
schematische Darstellungen des in der erfindungsgemäßen Vorrichtung verarbeiteten Schlauchmaterials,
Figur 2:
eine schematische Darstellung einzelner Schritte zur Verarbeitung eines Gewebeschlauchs zu Säcken gemäß einer ersten Ausführungsform der Erfindung und
Figur 3:
eine andere schematische Darstellung einzelner Schritte zur Verarbeitung eines Gewebeschlauchs zu Säcken nach einer zweiten Ausführungsform der vorliegenden Erfindung.
Further features, details and advantages of the invention will become apparent from the embodiments illustrated in the drawings. Show it:
FIG. 1:
schematic representations of the tubing processed in the device according to the invention,
FIG. 2:
a schematic representation of individual steps for processing a fabric tube to bags according to a first embodiment of the invention and
FIG. 3:
another schematic representation of individual steps for processing a fabric tube to bags according to a second embodiment of the present invention.

Die Figur 1 zeigt schematisch einzelne Schritte zur Verarbeitung eines Gewebeschlauches 1 zu Säcken, wie sie in der erfindungsgemäßen Sackherstellungsvorrichtung 10 erfolgen.The FIG. 1 schematically shows individual steps for processing a fabric tube 1 into sacks, as they take place in the sack manufacturing device 10 according to the invention.

Zunächst wird der Gewebeschlauch 12 der Sackherstellungsvorrichtung 10 zugeführt. Dies geschieht in vorteilhafter Weise durch Abwickeln des einen Wickels 14 bildenden Gewebeschlauches in einer Abwickeleinrichtung 16. Anschließend erfährt der Schlauch 12 die sogenannte Öffnung in der Öffnungsstation 18. Dabei wird der Gewebeschlauch um ein Innenwerkzeug herumgeführt, welches die beiden Lagen voneinander trennt, so dass sich die Lagen, falls sie bei einem der Herstellungsschritte des Schlauches miteinander verklebt wurden, trennen. Nur bei getrennten Lagen kann sichergestellt werden, dass die folgenden Produktionsschritte ordnungsgemäß durchgeführt werden können. Im Anschluss werden die voneinander getrennten Materiallagen des Schlauches wieder aufeinandergelegt.First, the fabric tube 12 is fed to the sack manufacturing device 10. This is done in an advantageous manner by unwinding a fabric 14 forming a fabric tube in an unwinding 16. Subsequently, the tube 12 undergoes the so-called opening in the opening station 18. The fabric tube is guided around an inner tool, which separates the two layers from each other, so that the layers, if they were glued together in one of the manufacturing steps of the tube, separate. Only with separate layers can it be ensured that the following production steps can be carried out properly. Subsequently, the separate material layers of the hose are put back on top of each other.

Der Gewebeschlauch wird nun der Querschneideeinrichtung 20 zugeführt, die den Gewebeschlauch in einzelne Schlauchstücke vereinzelt. Anschließend erfolgt eine Änderung der ursprünglichen Transportrichtung z, in der der Schlauch bzw. die Schlauchstücke in Richtung ihrer Längsachsen transportiert wurden, in die neue Transportrichtung x, so dass die Schlauchstücke nun nicht mehr in Richtung z ihrer Schlauchlängsachse, sondern quer hierzu transportiert werden, so dass die Enden der Schlauchstücke zwecks Anformung der Böden seitlich erreichbar sind.The fabric tube is then fed to the cross-cutting device 20, which separates the fabric tube into individual tube pieces. Subsequently, a change of the original transport direction z, in which the hose or the hose pieces were transported in the direction of their longitudinal axes, in the new transport direction x, so that the hose pieces are now no longer transported in the direction of z tube longitudinal axis, but transversely thereto, so the ends of the pieces of tubing are laterally accessible for the purpose of forming the bottoms.

In der folgenden Station, der Bodenöffnungsstation 22, werden beide Enden eines jeden Schlauchstücks geöffnet und die sogenannten Bodenquadrate gelegt. In der darauffolgenden Ventilstation 24 wird auf eines der beiden offenen Enden ein Ventil aufgelegt und befestigt. Die offenen Böden werden nun in der Bodenschließstation 26 geschlossen, wobei zwei Laschen aufeinandergelegt werden. Diese können dann miteinander dauerhaft, beispielsweise durch Verschweißen, verbunden werden. Den Abschluss des eigentlichen Sackherstellungsprozesses bildet das Aufbringen je eines Bodendeckblattes auf die Böden in der Deckblattstation 28. Dazu können die Deckblätter ebenfalls aufgeschweißt werden. Die fertigen Säcke werden anschließend auf dem einen Sackstapel 30 abgelegt und von dort auf nicht näher beschriebene Art und Weise abtransportiert.In the following station, the bottom opening station 22, both ends of each tube piece are opened and the so-called bottom squares are laid. In the subsequent valve station 24, a valve is placed on one of the two open ends and fastened. The open floors are now closed in the bottom closing station 26, wherein two tabs are stacked. These can then be connected to each other permanently, for example by welding. The completion of the actual sack manufacturing process forms the application of a bottom cover sheet on the floors in the cover sheet station 28. For this purpose, the cover sheets can also be welded. The finished bags are then placed on the one stack of sacks 30 and transported away from there on unspecified manner.

In der hier dargestellten Ausführungsform sind zwei optische Sensoren 32 und 34 vorgesehen, über die die genaue Lage der Kanten des Kunststoffbändchengewebes (vgl. die Linien 2 in den Figuren 1) ermittelt wird. Hierzu sind die entsprechenden Sensoren 32 und 34 in der Vorrichtung 10 in dem Bereich der Kanten der Schlauchstücke 1 angeordnet, während diese noch in Richtung z ihrer Schlauchlängsachse transportiert werden. Durch die beiden jeweils sich im Kantenbereich dieser Schlauchstücke gegenüberliegenden Sensoren werden also die genaue Positionierung der Kanten und damit auch die exakte Breite der Schlauchstücke während des Transportes der Schlauchstücke in Transportrichtung z erfasst. Diese Daten werden in hier nicht näher dargestellter Art und Weise den Stellantrieben an der Bodenöffnungsstation 22 weitergeleitet.In the embodiment shown here, two optical sensors 32 and 34 are provided, via which the exact position of the edges of the plastic ribbon fabric (compare lines 2 in FIGS FIGS. 1 ) is determined. For this purpose, the corresponding sensors 32 and 34 are arranged in the device 10 in the region of the edges of the tube pieces 1, while they are still transported in the direction z of their tube longitudinal axis. By the two respectively in the edge region of these pieces of hose opposite sensors so the exact positioning of the edges and thus the exact width of the hose pieces during transport of the hose pieces in the transport direction z are detected. These data are forwarded to the actuators at the bottom opening station 22 in a manner not shown here.

Auf der Basis dieser Daten wird dort das kinematische Bewegungsgesetz der Bodenöffnungsstation so verändert, dass es die Gewebeschlauchbreitenschwankungen und Positionsabweichungen ausgleicht. Hierdurch können bisherige Qualitätseinbußen bei der Bildung des geöffneten Bodenquadrats in der Bodenöffnungsstation 22 ausgeglichen werden. Es kommt im Ergebnis zu weniger Stopps der Maschine und zu einer Verringerung des Ausschusses.On the basis of this data, the kinematic law of motion of the floor opening station is changed in such a way that it compensates for the fabric hose width fluctuations and position deviations. As a result, previous quality losses in the formation of the open bottom square in the bottom opening station 22 can be compensated. As a result, fewer stops of the machine and a reduction in rejects occur.

Erfindungsgemäß kann dabei die Geschwindigkeit des Werkzeuges in Abhängigkeit von der durch den Sensor ermittelten Lage der hinteren Kante des Gewebes eines Schlauchstückes verringert bzw. erhöht werden, während das Werkzeug mit dem Schlauchstück in Kontakt steht, um die Werkzeugbewegung an die Lage der Kante anzupassen.According to the invention, the speed of the tool can be reduced or increased in dependence on the position of the rear edge of the fabric of a piece of hose determined by the sensor, while the tool is in contact with the piece of hose in order to adapt the tool movement to the position of the edge.

Alternativ oder zusätzlich kann dabei die Geschwindigkeit des Werkzeuges in Abhängigkeit von der durch den Sensor ermittelten Lage der vorderen Kante des Gewebes eines Schlauchstückes verringert bzw. erhöht werden, bevor das Werkzeug mit dem Schlauchstück in Kontakt kommt, um die Werkzeugbewegung an die Lage der Kante anzupassen.Alternatively or additionally, the speed of the tool can be reduced or increased depending on the determined by the sensor position of the front edge of the fabric of a piece of tubing before the tool comes into contact with the hose piece to adjust the tool movement to the position of the edge ,

Die Beeinflussung des Bewegungsprofils der Werkzeugbewegung kann dabei bspw. durch folgende Alternativen erfolgen:

  • Durch Beeinflussung eines Differentials erfolgen (Überlagerung der An triebsbewegung mit einer weiteren Bewegung).
  • Durch Beeinflussung eines Direktantriebs (Servomotors).
  • Durch eine Phasenverschiebung durch Verdrehen von Antriebskompo nenten gegeneinander, bspw. durch einen Stellmotor oder durch Lösen einer Klemmverbindung und erneutes Befestigen an anderer Position.
The influencing of the movement profile of the tool movement can take place, for example, by the following alternatives:
  • By influencing a differential done (superposition of the drive motion with a further movement).
  • By influencing a direct drive (servomotor).
  • By a phase shift by rotating Antriebskompo components against each other, for example. By a servo motor or by releasing a clamp connection and re-attaching to another position.

Eine alternative Ausgestaltung der Erfindung ergibt sich aus der Figur 3. Dort ist eine leicht modifizierte Vorrichtung 10 gezeigt, die aber im Wesentlichen ähnlich aufgebaut ist. Hier sind die einzelnen Stationen zur Bildung der Kreuzböden 40 auseinander gezogen.An alternative embodiment of the invention results from the FIG. 3 , There is a slightly modified device 10 is shown, but is constructed substantially similar. Here, the individual stations 40 are pulled apart to form the cross bottoms.

Das zu bearbeitende Schlauchstück 1 wird in hier nicht näher dargestellter Art und Weise zunächst in Pfeilrichtung z, also in Richtung der Schlauchlängsachse gefördert. Hier ist der Teil dargestellt, in der die Transportrichtung z, in der der Schlauch bzw. das Schlauchstück zugefördert wurde, in die neue Transportrichtung x geändert wurde.The piece of tubing 1 to be processed is conveyed in a manner not shown here, first in the direction of the arrow z, that is to say in the direction of the tube longitudinal axis. Here is the part shown in which the transport direction z, in which the hose or the hose piece was conveyed, was changed to the new transport direction x.

In dem hier dargestellten Ausführungsbeispiel befinden sich zwei nebeneinander angeordnete Sensoren 36 und 38 oberhalb der Transportebene des in Richtung x transportierten Schlauchstücks 1. Die entsprechend aufgehängten Sensoren erfassen dabei die jeweiligen Kantenbereiche der durch das Kunststoffbändchengewebe gebildeten Kanten. Dabei werden hintereinander die vorlaufende Kante und die rücklaufende Kante des Schlauchstücks 1 erfasst. Die sich hieraus ergebende Breite und genaue Lage kann an einen Stellantrieb 42 einer Bodenöffnungsstation 44 weitergegeben werden.In the exemplary embodiment illustrated here, two sensors 36 and 38 arranged next to one another are located above the transport plane of the hose piece 1 transported in the direction x. The correspondingly suspended sensors detect the respective edge regions of the edges formed by the plastic ribbon fabric. In this case, the leading edge and the returning edge of the hose piece 1 are sequentially detected. The resulting width and exact location can be passed to an actuator 42 of a bottom opening station 44.

Im hier dargestellten Ausführungsbeispiel sind die Bodenöffnungsstationen 44 nicht unmittelbar gegenüberliegend, sondern versetzt zueinander angeordnet. So werden die jeweiligen Böden nicht gleichzeitig, sondern versetzt zueinander in Transportrichtung x gebildet. Nach Bildung der jeweiligen Böden 40 wird der fertige Sack durch entsprechende Transporteinrichtungen 46 erfasst und weitertransportiert, um die Säcke in hier nicht näher dargestellter Art und Weise zu stapeln.In the embodiment shown here, the bottom opening stations 44 are not directly opposite, but offset from each other. Thus, the respective bottoms are not formed simultaneously but offset from each other in the transport direction x. After formation of the respective bottoms 40 of the finished bag is detected by corresponding transport devices 46 and further transported to stack the bags in a manner not shown here.

Claims (15)

  1. An apparatus for manufacturing sacks from hose pieces (1) that comprise fabrics of oriented plastic tapes, wherein the fabric is provided with a coating of a polymer, comprising:
    - at least one transport device for transporting the hose pieces (1) along a transport path in a transport direction (x) that extends transversely to their direction of extension (z), wherein the hose pieces (1) advantageously can be conveyed in a horizontal position,
    - at least one bottom opening station (22) for laying an open cross-bottom (40) with at least one revolving tool for spreading apart the previously opened ends of the hose pieces (1) and for aligning the corner tucks formed thereby,
    - optionally at least one valve station (24),
    - at least one bottom closing station (26), and
    - optionally at least one cover sheet station (28),
    characterized in
    that in the transport path at least one sensor (32, 34; 36, 38) is arranged, by means of which the exact position of at least one of the edges of the hose pieces (1) formed by the fabric is detectable, and that means are provided which influence the motion sequences in the at least one bottom opening station (22) corresponding to the detected position of the fabric edge.
  2. The apparatus according to claim 1, characterized in that the at least one sensor (32, 34; 36, 38) is arranged above and/or below the transport path in the transport direction (x) that extends transversely to the direction of extension (z) of the hose piece (1).
  3. The apparatus according to claim 2, characterized in that two sensors (32, 34; 36, 38) are arranged one beside the other such that they can detect a lateral edge of the hose piece (1) formed by the fabric.
  4. The apparatus according to claim 1, characterized in that the at least one sensor (32, 34; 36, 38) is arranged above and/or below the transport path in the transport direction (x), which extends along the direction of extension (z) of the hose piece (1).
  5. The apparatus according to claim 4, characterized in that two sensors (32, 34; 36, 38) are arranged opposite each other relative to the conveyed hose piece (1) such that they can detect the opposed lateral edges of the hose piece (1) formed by the fabric.
  6. The apparatus according to any of the preceding claims, characterized in that the means for influencing the motion sequences in the bottom opening station (22) consist of actuating drives, via which the motion sequences of the tools necessary for forming the bottom, in particular of the revolving tool, are adaptable by a motor to the exactly detected position of the at least one fabric edge of the hose portion.
  7. The apparatus according to claim 6, wherein the movement generated by the actuating drives is superimposed with the movement of a further drive that generates a drive movement of the tools necessary for forming the bottom, in particular of the revolving tools, wherein the further drive advantageously generates a non-uniform drive movement via a mechanical non-uniformity transmission.
  8. The apparatus according to any of the preceding claims, characterized in that the means for influencing the motion sequences in the bottom opening station (22) consist of control commands, which in a plant control unit serve for actuating servo motors used as individual drives of the tools necessary for forming the bottom, in particular of the revolving tool.
  9. The apparatus according to any of the preceding claims, characterized in that optical sensors (32, 34; 36, 38) are used for recognizing the fabric edges.
  10. The apparatus according to claim 9, characterized in that the optical sensors (32, 34) include a light source and a light receiver, between which the hose pieces (1) are guided through.
  11. The apparatus according to claim 10, characterized in that the light source is a laser.
  12. The apparatus according to any of the preceding claims, characterized in that capacitive and/or mechanical sensors (32, 34; 36, 38) are used for recognizing the fabric edges.
  13. The apparatus according to any of the preceding claims, characterized in that means are present for adapting the length of the bottom cover sheets to the detected width of the fabric of the hose portions (1).
  14. A method for manufacturing sacks from hose pieces (1) that comprise fabrics of oriented plastic tapes, wherein the fabric is provided with a coating of a polymer, comprising the following steps:
    - handing over the hose pieces (1) to a transport device,
    - continuously and preferably uniformly transporting the hose pieces (1) along a transport path in a transport direction (x) that extends transversely to the direction of extension (z) and parallel to the width direction of the hose pieces (1), wherein the hose pieces (1) advantageously are transported in a horizontal position,
    - laying an open cross-bottom (40) by means of at least one revolving tool by spreading apart the previously opened ends of the hose pieces (1) and by aligning the corner tucks formed thereby,
    - optionally applying a valve patch,
    - closing the bottom, and
    - optionally applying a bottom cover sheet,
    characterized in
    that the exact position of at least one of the edges of the hose pieces (1) formed by the fabric is detected and the motion sequences for laying the open cross-bottom (40) are adapted to the detected position of the fabric edge.
  15. The method according to claim 14, characterized in that for carrying out the method an apparatus according to any of claims 1 to 13 is used.
EP14761577.7A 2013-09-04 2014-09-02 Apparatus for producing bags Active EP3041672B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310014739 DE102013014739B3 (en) 2013-09-04 2013-09-04 Device for producing bags from tube pieces, has sensor arranged in transport path for detecting set of edges of tube pieces, and for detecting set of motion sequences in station with regard to acquired fabric layer
PCT/EP2014/002371 WO2015032485A1 (en) 2013-09-04 2014-09-02 Apparatus for producing bags

Publications (2)

Publication Number Publication Date
EP3041672A1 EP3041672A1 (en) 2016-07-13
EP3041672B1 true EP3041672B1 (en) 2019-04-03

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EP (1) EP3041672B1 (en)
CN (1) CN105722673B (en)
BR (1) BR112016004527B1 (en)
DE (1) DE102013014739B3 (en)
WO (1) WO2015032485A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013014739B3 (en) * 2013-09-04 2014-08-07 Windmöller & Hölscher Kg Device for producing bags from tube pieces, has sensor arranged in transport path for detecting set of edges of tube pieces, and for detecting set of motion sequences in station with regard to acquired fabric layer
CN110281586A (en) * 2019-07-31 2019-09-27 常熟理工学院 A kind of plastics lead directly to bag folding machine and fold control method
CN113815263B (en) * 2021-07-26 2023-05-26 济南约克农牧器械有限公司 Side adds mouth system bag production line

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Publication number Priority date Publication date Assignee Title
DE1753634B2 (en) * 1963-04-11 1971-10-14 METHOD OF ADHESIVE AND DEVICE FOR FORMING A CROSS-BOTTOM ON A HOSE FOR THE PRODUCTION OF A CROSS-BOTTOM BAG
DE1479855B1 (en) * 1965-02-16 1971-03-11 Windmoeller & Hoelscher DEVICE FOR THE SELF-ACTING SORTING OF THE CROSS-CONVEYED FLAT-LAYING HOSE SECTIONS IN BAG MACHINERY DIFFERENT FROM THE SET WIDTH
DE102008017444B4 (en) * 2008-04-03 2011-07-28 Windmöller & Hölscher KG, 49525 Apparatus and method for the production of sacks from pieces of hose
CN101983166B (en) * 2008-04-03 2015-10-21 温德莫勒及霍尔希尔公司 For being manufactured the apparatus and method of sack by flexible pipe part
DE102008017446A1 (en) * 2008-04-03 2009-10-15 Windmöller & Hölscher Kg Apparatus and method for producing sacks
CN201864072U (en) * 2010-06-23 2011-06-15 深圳安吉尔饮水产业集团有限公司 Conveying and deviation-correcting device for packaging film
EP2441574B1 (en) * 2010-10-14 2013-05-15 Starlinger & Co Gesellschaft m.b.H. Method and device for constructing open bases at end sections of tubular bag bodies
DE102013014739B3 (en) * 2013-09-04 2014-08-07 Windmöller & Hölscher Kg Device for producing bags from tube pieces, has sensor arranged in transport path for detecting set of edges of tube pieces, and for detecting set of motion sequences in station with regard to acquired fabric layer

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DE102013014739B3 (en) 2014-08-07
CN105722673B (en) 2019-05-21
BR112016004527B1 (en) 2021-07-27
EP3041672A1 (en) 2016-07-13
CN105722673A (en) 2016-06-29
BR112016004527A2 (en) 2017-08-01
WO2015032485A1 (en) 2015-03-12

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