EP0164079B1 - Machine for the production of packets containing a solvent - Google Patents

Abstract

A packaging machine is disclosed for making and filling packages (1) consisting of inner (13) and outer (2) containers formed from sheet material. The apparatus comprises two supply locations (35) for supplying two separate webs of packaging material (31, 32). In station A tubular outer containers (2) are constructed from the web (31). In station B web (32) is formed into individual containers sealed and filled with a flowable, e.g. liquid, material. In station C the filled inner containers (13) are mated with the outer covers (2) which are sealed in station D and discharged from the apparatus.

Description

The invention relates to a machine for producing plasticizer packs with filling bags inside and support sleeve outside.

Machines are already known for packs for absorbing liquids as flow agents, in which machines are continuously operated from a plastic-coated paper web in which a tube is formed, filled with liquid and separated and welded into individual packs.

Up to now, it has been much more difficult to manufacture packs with filling bags on the inside and support sleeve on the outside, because on the one hand, the folding box was formed (albeit without filling) in a machine with a similar effort to the liquid packaging machine of the type mentioned above, with filling and disconnection from a tube , usually from a blank, and on the other hand a filling bag was created in another machine with comparable effort, which was entered in a third machine part in the open folding carton, after which the folding carton could only be closed and removed.

In contrast, it is an object of the present invention to provide a machine for producing plasticizer packs of the type mentioned at the outset, which allows easier production with a large mass throughput and secure closure for an plasticizer pack which can be opened better than conventional packs with an internal filling bag.

This object is achieved in that two separate supply rolls are provided for the removal of two material webs to processing stations arranged one behind the other, that in a first processing station molding devices are provided for the creation of a support sleeve tube piece from the first material web and a first conveyor device receiving the tube pieces ; In a second processing station, devices are provided for producing a row of filled individual filling bags arranged side by side from the second material web; In a third processing station, transport devices and devices for combining the filling bag and the tube piece with a mandrel wheel are provided; and in a fourth processing station, locking devices for the support casing and conveyors are provided. In the manufacturing machine according to the invention, supplies for a first material web, preferably a roll, and supplies for a second material web, preferably a zigzag-folded stack, are arranged side by side and separately, from which only tubular support sleeves are formed, on the one hand, into which specially designed filling bags on the other hand used in the third processing station and partially secured in this and partially in the fourth processing station under sealing so that only the all-round support sleeve is formed. In contrast to the prior art, a nearly finished folding box, even if only open on one side, is not formed from a stack of blanks, but instead a piece of pipe is formed from the first material web in a correspondingly continuous manner as a supporting sleeve part, which is attached to both Ends is open. Such pieces of pipe can in turn advantageously be picked up, transported and processed accordingly by means of a conveyor belt and / or mandrel wheels. If, on the other hand, the above-mentioned further measure according to the invention also produces a row of filled bags arranged next to one another from a second material web, the mandrel wheels are more easily connected to the supporting sleeve tube pieces because the latter are still open at both ends . Finally, suitable measures are to be provided for how these pipe pieces which are open at the ends can be closed, namely by means of closing devices which interact with the mandrel wheels.

It can thus be seen that webs of material to be processed in a continuous manner are prepared, combined and connected to one another in such a way that a powerful machine with a high throughput can be used to produce flux packs of the type in question, which are also easy to open, as will be explained in more detail below is explained.

It is expedient according to the invention if the first material web is mounted on a roll as a storage location and consists of a paper web coated at least on one side with plastic and if the second material web is stored in the form of a zigzag stack as a storage location and consists of a double-layered film web Plastic with at least one end, optionally at two diametrically opposite ends sealed cover parts. Instead of the known paper blanks, the first material web for continuous removal and processing from a packaging material is used according to the invention, which was previously used in the packaging manufacturing machines described at the outset, which manufacture a tube, fill with liquid and produce individual packages by cross-welding and cutting. If one follows the teaching of this invention, a very thin plastic coating on the paper web is sufficient, because the superplasticizer to be packaged is in the filling bag, that of the pack is supported from paper.

Known plastic sheets in the form of a film tube lie in the outer folding box without special attachment. According to the invention, however, cover parts are sealed on at least one and preferably on two ends of the filled and isolated filling bag, which are used for closing the support sleeve tube piece. From this it can already be seen that the finished filling bags are fastened in the finished support sleeve which is closed on both sides. This surprisingly provides the possibility of inexpensive mass production and an improved opening device. Through the above-mentioned measures, one can seal an opening flap on one or on one of the two oppositely sealed cover parts in such a way that when this flap of the support sleeve is torn open, a hole is torn into the filling bag, so that the pouring process begins immediately after tearing open an opening strip can. The use of a double-layered sheet of film with the sealed cover parts also advantageously allows the filling bag to be completely filled with flow agent, in particular with liquid, without fear of the liquid spilling over when opened. A preferred embodiment is designed in such a way that the cover parts are sealed at the opposite ends on the film web over a larger area which, in a ring-shaped sealing manner, surrounds that sealing area which is torn open when the opening strip is torn open. As a result, the filling bag remains stuck to the cover part even after being torn open, which prevents spillover when opening and air can penetrate between the support sleeve and the filling bag, while liquid is poured out through the hole in the cover mentioned. One recognizes not only the favorable opening possibility but also the simplified and advantageous pouring out with such an eluent pack.

Their manufacture is particularly advantageous if, according to the invention, the molding devices of the first processing station have mold flaps encompassing a mandrel with a sealing station and two peripheral conveying stations and the mandrels of the mandrel wheels are external mandrels. The configuration of the mandrels as external mandrels surprisingly allows simplified devices for inserting the filled and finished filling bag into supporting sleeve tube parts located in the external mandrel; also allows the free edges of the tubular casing pieces to be flanged over, so that the above-mentioned cover parts seated on the film parts can be welded on with simple devices.

In the first processing station, the pipe section is created from the flat first material web, the coated paper web, by separating the web into jacket pieces and guiding them with the form flaps into the pipe form and welding them with a longitudinal sealing seam in such a way that the desired casing pipe section is welded results.

It is particularly expedient if, according to the invention, viewed in the conveying direction of the first material web, in addition to a first position, the cutting devices for separating flat web pieces, which can be moved to at least a second position and back and are attached to a sled, behind which sealing stations preferably working with hot air in the second position and a movable flanging tool is arranged behind it in a further position and when the mandrel is stationary and extends at least from the sealing station to the conveying tool.

Preferably, one works simultaneously in each position with two form flaps arranged side by side, which are two parts which can be rotated like a hinge about a common shaft and, after being folded up, completely embrace the mandrel and the cut piece of the first material web located around it. The hinge or the shaft connecting the two flaps in each station is expediently fastened to a carriage, both carriages being able to be moved together to the first or second position and back. The first position is preferably vertically above the second. In the first position, the flat, isolated web piece is brought into the desired tube shape around the mandrel, the web pieces in this shape are moved down to the second position and there the longitudinal edge of the tubes can be prepared with hot air and brought to the finished longitudinal seam by pressure stamps. Suitable conveyor tools, e.g. B. clamps, slides or drive jaws pull the finished pipe piece vertically down into a further position in which the flanging tool has one end, in this case preferably the lower one

Flanged end of the sleeve tube piece so that there is an annular edge on which a cover part of a corresponding configuration can be sealed.

In an expedient further embodiment of the invention, a recess cooperating with a piston projection is arranged at one point on the circumference of the rearmost end of the mandrel to create a pouring edge of the pack. The rearmost end of the mandrel is the end seen in the direction of flow of the material web, in the embodiment described above with the vertical arrangement, the lowest end. At this point, the above-mentioned flanging tool will preferably also be arranged, so that at the same time as the flanging, the recess at the edge of the cylindrical wall side of the Pipe piece is introduced. This recess is preferably made at the point at which the tear-off strip of the opening device is arranged in the cover (upper cover part). Such a liquid pack is preferably torn open from the outside towards the center, and in the area under the torn-off cover strip, which is formed from the material of the cover itself (by cutting lines), there is an inner cover strip with a hole as a pouring opening, around which is ring-shaped the filling bag is sealed in the manner described above. If you then pour out liquid, the pouring jet at the pouring edge separates well from the side wall below the pouring edge, because the recess mentioned prevents liquid from depositing on the outer wall, for example by adhesive forces, and flowing down along it.

A first embodiment of the invention is characterized in that the first conveyor device receiving the pipe pieces is a first mandrel wheel. Another embodiment with an endless belt as a conveyor will be described later.

It is also advantageous according to the invention if the first outer mandrel wheel has two outer mandrels displaceable in the direction of its axis on each working surface, and preferably four on a mandrel slide in the axial direction. In this way, two outer mandrels of the pair of flaps can be provided with the cladding tube pieces during the first movement and after the slide has been axially displaced, the two other outer mandrels can be provided with the cladding tube pieces in the second step, so that further processing takes place in four pieces from this first outer mandrel wheel. This can further improve the throughput of the machine.

So far, the first processing station with its corresponding molding devices and the first mandrel wheel has been described. In the first processing station, four pieces of pipe were formed from the first material web (paper), which were flanged at one end and received in a first mandrel wheel.

In the second processing station mentioned, the filled individual filling bags are created from the second material web, which are then to be combined with the pipe pieces in a third processing station and some of which are to be further processed. In the following, the facilities of the second processing station are described in more detail with which bags filled with the sealed cover parts are created from the film web.

• mindestens zwei unter einem Winkel von etwa 30° bis 60°, vorzugsweise 45°, zueinander angestellte Umlenkwalzen,
• ferner eine Längssiegelstation,
• ein Füllrohr,
• darunter angeordnete Formschweißketten,
• einen Querverteilungsförderer,
• Vereinzelungs- und
• Abgabeeinrichtungen auf.

The devices for creating the filling bags in the second processing station

• at least two deflecting rollers positioned at an angle of approximately 30 ° to 60 °, preferably 45 °, to one another,
• also a longitudinal sealing station,
• a filling pipe,
• Form welding chains arranged underneath,
• a cross distribution conveyor,
• Separation and
• Dispensing facilities on.

The second material web provided for creating the filling bags is not taken from a roll but from a zigzag-shaped stack as a supply. The reason is the sealed cover parts. Where these are welded to the film, there is a considerably thicker material area than next to it, where only two films lie on top of each other. This would make winding on a roll more difficult or would damage the two webs of material. It is particularly useful to use a material web designed in this way (up to the longitudinal welding and filling station) that on the side opposite the folding seam the two film edges are not yet connected to one another and the cover parts are in each case on the edge on the outer surface of opposite web halves in their flat surfaces are arranged. In this way, the second material web designed in this way can be transported over deflection rollers and also set at angles as if the cover parts were not attached to the film.

The deflection of the second material web by the deflecting rollers positioned at the above-mentioned angle relative to one another has the reason that the two cover parts can be correctly positioned in the downstream device for combining the filling bag and the tubular casing piece. It was explained above that the cover parts in the flat state of the film web are still arranged on the flat surfaces and on the respective opposite edges of the film web halves. The deflecting rollers now ensure that the second material web, the film web, is fed to the cladding tube pieces at such an angle to the longitudinal and processing direction of the overall machine that the respective filling bag is rotated relative to the flat position of the web shape so that a connecting line from a cover part to other lies in the machine's longitudinal and processing directions. This rotation of the film web can be illustrated, for example, by cutting off a piece of film web with, for example, only two or three cover parts arranged one behind the other and thinking longitudinally sealed on the side opposite the fold line. If you then run both hands flat between the film, so that the outer edges of the hand come to rest on the folds or welds, you can easily turn both hands in the same direction by the same angle of z. B. imagine 40 °. As a result, the folded seam and the opposite sealed seam migrate automatically the end faces by a certain amount to one side, while the cover parts located on the flat part before turning now come to lie on the end faces due to the aforementioned rotation. The technical means on the machine for carrying out the equivalent rotation are explained in detail below.

It is also advantageous according to the invention if the axes 20 of both deflecting rollers each lie in a horizontal plane, the filling tube and the opposing form welding chains interacting in pairs to form a series of tubular spaces are arranged essentially in a vertical direction above the horizontal planes of the outer mandrel wheel axes . This structure allows the film web with the cover parts still flat and parallel to one another to be deflected from a supply located in the lower area of the machine into an upper area in which the feed piece of the vertically arranged filling tube is inserted through the open side of the film tube, and from there vertically around the filling tube, past this down into a welding and separating device for the filling bags, which is constructed in the form of the two shape welding chains mentioned. The axis of the first outer mandrel wheel already mentioned is parallel and transverse to the longitudinal direction of the finished filling bag; also transversely to the axes of rotation around which the form welding chains are guided. Since the general direction of conveyance and processing of the machine according to the invention, i.e. the longitudinal direction, transverse to the axial direction of the outer mandrel gears, the connecting line of two cover parts in each filling bag just created must also lie in the machine longitudinal direction, because the outer mandrels are also in certain positions in this longitudinal direction and in this way position by position the further processing, i.e. Flanging, transporting, combining the envelope tube piece with the filling bag, welding on one side, closing on the other side, etc. on the mandrel wheels or by transferring from one mandrel wheel in the machine longitudinal direction to the next.

It can also be seen here that the first processing station with the shaping devices for the production of the tube pieces and the first outer mandrel wheel is arranged in the machine longitudinal direction at a distance from the second processing station and at an even greater distance from subsequent mandrel wheels.

The form welding chains create a series of tubular spaces in the film web, which ultimately become the filling bags. Without foil webs, between the pair of form welding chains interacting in the vertical direction, superimposed tubular spaces are created, which can also be imagined as cylindrical spaces if two half cylinders are held together on each form welding chain. Instead of chain links, the welded chains are each provided with an endless row of half-shells or troughs, one of which is heated and the other of which is designed as a counter-jaw, in order to press and weld through the filled film tube, creating the individual film bags .

The cover parts protrude from the front and rear of the half-shells or troughs of the form welding chains and lie in planes that are approximately perpendicular to the axes of the form welding chain drive rollers. Instead of the vertical direction described above of the filler pipe, this film web running along and the main direction of the respective run of the shape welding chains, a guide with a certain inclination could of course also be provided, but a guide direction with a vertical component is always useful, because the level of the plasticizer above the shape welding chains and under the longitudinal sealing station should be arranged.

The invention is expediently further embodied in that a control ring supporting the material web is fastened at a distance encompassing the material web under the longitudinal sealing station with a slot-shaped hot air nozzle above the two form welding chains and the filling tube. The rotation of the film web by the angle mentioned in such a way that the two cover parts initially lying flat on the film web are rotated from the edge regions into the front ends is easier if the film web is spatially expanded behind or below the longitudinal sealing station and via the support or Control ring pulls because any pre-orientations of the material web by folding edges, longitudinal sealing seams or the like are thereby canceled.

It is also advantageous according to the invention if the transverse distribution conveyor has an endless trough chain which is guided approximately horizontally about two horizontal axes spaced apart from one another and has cutting devices located between the troughs for separating the filling bags. The cutting devices between the troughs are preferably receiving slots for a cutting knife. It is then sufficient if a knife or scissor device is arranged at one point under the form welding chains, so that the cutting blade located there moves into the respective recess between two troughs and there severes the piece of film which bridges two filled foil bags one behind the other. The cutting line is expediently carried out in the middle through a wide sealing seam, namely that sealing or welding seam which is created by the shape welding chains. The trough chain has the advantage of gentle absorption of the Filling bag chain that is continuously guided out of the pair of welded chains during operation, which can then also be separated gently. If one arranges the transverse distribution conveyor in the position described above, then the filling bags are evident in the longitudinal direction to the machine longitudinal and processing direction, ie in a favorable position for inserting the filled bags into the hollow casing tube pieces.

The transfer from the trough chain into the cladding tube pieces is particularly advantageous if, according to the invention, discharge devices with clamping devices are arranged transversely to the conveying direction of the trough chain. The removal is achieved gently and quickly by pushing stamps, pulling devices or conveyors, the clamping devices ensuring that the filling bags deposited in the troughs of the trough chain do not twist. This is particularly useful if one of the cover parts, e.g. B. the lid provided with the opening device has a gripping tab or the like protruding over the circumference, which is to be held at a specific position for further processing in the machine according to the invention.

By the features described last with regard to the second processing station, those measures are described so far with which the special film web is deflected in the manner described that the cover parts come to rest on the front ends of the finished and filled filling bag, before filling the film web is sealed in the longitudinal direction at its free end, filled, cross-welded and separated in order to be ejected - lying in the troughs of the trough chain - with correct positioning for further processing. These are the measures of the second processing station, after the formation of the pipe sections was previously explained using the first processing station. The further explanation of the third processing station now follows the union of the filling bag and the tube piece. As already described above, this station contains transport devices and equipment for inserting the filling bags into the pipe sections.

According to the invention, it is expedient here if the transport devices in the third processing station have at least two and preferably four guide channels arranged side by side and transversely to the conveying direction of the trough chain and inclined to the horizontal, the distance on the inlet side of which is smaller than their distance on the outlet side. It has already been described above that the film web is first led into the upper machine area and from there down again parallel to the filling pipe. Thus, the approximately vertically working form welding chains are arranged above the approximately horizontally working trough chain, and it is not difficult for the invention to arrange this entire structure for erecting the filling bags at a height above a general lower processing plane, in which the axes of the mandrel wheels preferably lie. In this way, in addition to the removal devices for the filled foil bags from the trough chain into the hollow tube pieces, the gravity or the weight of the bags filled with filling material can also be exploited in order to bring about the union between the filling bag and the tube piece. The gravity or the weight of the filling material is best used by the above-mentioned, diagonally arranged guide channels, in which the filled foil bags can be pushed or pulled directly from the trough chain into the provided hollow casing tube piece. Additional auxiliary support plates or similar tracks can optionally be arranged at the transition areas. However, it is important in the measures described last that the distance between the guide channels on one side is smaller than on the other side. The reader has understood that the troughs of the trough chain are relatively close together, because their position must correspond exactly to the half-shells of the shape welding chains and thus to the product that comes out of them, the chain of filling bags. However, the filling bags are only separated from each other by a cross weld seam (seen with regard to the film tube). On the other hand, for the processing and construction of an outer mandrel wheel, a little more space is desired between the individual outer mandrels of a wheel, which in a preferred embodiment has four mandrels in each angular position in the direction of its axis. In order to make the distance between the four mandrels larger, an adaptation by means of the guide trough must be provided. Since the lateral component when spreading the guide trough is small from the end with the small distances to the end below with the larger distances, this lateral component does not prevent the filling bags from sliding through or utilizing the weight of the filling material during the transfer from the trough chain into the filling pipe piece .

It is expedient according to the invention if the mandrel wheel with the combining devices for filling bag and tube piece is designed as a second outer mandrel wheel and in the direction of its axis on each of the z. B. eight work surfaces has two, preferably four external mandrels and pneumatic devices for generating negative and / or positive pressure in at least some external mandrels. The number of outer mandrels in the direction of the mandrel wheel axis has already been discussed. If this and possibly other external mandrel wheels have pneumatic devices of the type just described, the Transporting a filling bag into or out of the tall pipe section - or filling bag with a pipe section out of the outer mandrel - is easier if, instead of or in addition to pushing in, provision is made for suction and the pushing out or pulling off either by external gripping devices or by internal pressure - or if necessary by both.

The combination of the envelope tube piece and the filling bag thus takes place, among other things. with the help of pneumatic devices, i.e. with the help of partially inserted filling bags into the hollow tube piece inside the outer mandrel on the mandrel wheel. This insertion and simultaneous suction is not disturbed by the fact that the mentioned cover parts are attached to the front ends. Practice has also shown that the softness of the cladding tube material does not even impede the flanged edge or even damage the thin film material of the filling bag.

If, in an advantageous further embodiment, a welding device for a first cover part for unilaterally closing the cladding tube piece is provided on a mandrel position of the second outer mandrel wheel, the pneumatic device on the second outer mandrel wheel, together with the weight of the filling material, has an advantageous effect in that the top down Filling bags introduced into the tube piece have a tendency to sag further, provided that at least one vertical component is maintained. If the said mandrel position of the second outer mandrel wheel with the second welding device is assumed to be vertically above the axis of the second outer mandrel wheel in the middle, this force acting in the perpendicular direction has a particularly pronounced effect in the filling bag. So that the film material is pulled out of the area between the support edge at the end of the pipe section and the peripheral edge of the cover part to be connected to it, so that a secure welding of the first cover part, for example the cover, to the cladding pipe section is ensured.

This welding is particularly advantageous if, according to the invention, the welding device has a pressure piston which is arranged to be movable vertically above the middle, upper position of the outer mandrel and, in addition to this, the hot pressure jaws or hot air nozzles which encompass the outer, free end of the outer mandrel and are movable approximately transversely to the direction of movement of the pressure piston. Here, the plastic is softened and made sticky with heat radiation, thereby preventing long-term application of heating jaws on opposite sides of the paper web with the heat flowing through the paper accordingly. The cover part and pipe section can be connected quickly and reliably.

The measures described last of the third processing station with the devices for the first combination of filling bag and tube piece are finally followed by further measures of the fourth processing station, in which sealing devices are provided for the entire support casing and also for conveyors. The support sleeve consists of the tube piece with the two attached cover parts. In the third processing station described last, the tube piece and the filling bag were combined and a cover part of the filling bag, preferably the part with the opening device that would later be the cover, was welded to one end of the tube piece. The fourth processing station now ensures that the opposite cover part is welded to the other still free end of the pipe section and that the pipe section completely closed with it is removed, i.e. the entire support sleeve or the finished package.

A favorable further embodiment of the invention is characterized in that in the fourth processing station, a third outer mandrel wheel is rotatably arranged next to the second outer mandrel wheel with the same number of outer mandrels and parallel wheel axis and in the same direction of rotation, and a device for transferring cladding tube pieces from the second to the third outer mandrel wheel and a welding device for a second cover part for completely closing the cladding tube piece are provided. It is particularly advantageous if, according to the invention, the third outer mandrel wheel has pneumatic devices for generating negative and / or positive pressure in at least some outer mandrels and if a discharge conveyor is arranged on the side of the third outer mandrel wheel opposite the second outer mandrel wheel. The discharge conveyor is located at the output end of the machine, practically at the rearmost point in the machine's longitudinal direction. The conveyor picks up the finished superplasticizer pack and feeds it to other testing and packaging stations.

In the fourth processing station, which is described in more detail by the above measures, the double-sided sealing and final completion of the superplasticizer package is carried out by means of external mandrel wheels. While the second outer mandrel wheel described above still belonged to the third processing station, suitable transfer devices ensure that in the respective cycle, four tube pieces, closed on one side, with filling bags arranged on the inside are pushed from the second mandrel wheel into the third, so that an open one is still to be processed End of the pipe section comes to the outside. A corresponding rotation of the third outer mandrel wheel can still make it unfinished Ends are rotated into a position in the machine, which are arranged so that they can be reached easily for similar welding devices as already described above. Then the other cover part, which is already on the filling bag, is welded on for both-sided or final sealing of the support sleeve.

By inserting the filling bag into the hollow pipe section in the third processing station, the case can occur that the cover part, for example the bottom, first inserted into the pipe section, despite its being sucked in by the pneumatic devices in the second outer mandrel wheel, has its outer edge within the flanged edge on The end of the pipe section remains. If necessary, the cover part can even bend, while the flanged edge at the end of the pipe section still remains outside the cover part circumference. This condition can remain unchanged even when the tube piece processed and correctly closed is ejected pneumatically.

In this case, it can be useful if the welding device on the third outer mandrel wheel, preferably above it in the middle vertical, upper position, has a pressure piston provided with suction devices, which, before welding and before pressing on the plastic surfaces to be glued together, on the edge and cover part the latter pulls out, so that it is ensured with certainty that the cover part is placed from the outside onto the flanged edges of the still open end of the pipe section and is pressed on while gluing the thermally softened plastic.

Another preferred embodiment of the machine is characterized according to the invention in that the first conveying device which receives the pipe pieces is an endless belt which rotates around vertical axes and which can be moved alternately by one and three units. It has already been indicated above that the first conveying device, which receives the pipe pieces, can also be designed as an endless belt running around vertical axes instead of as a mandrel wheel in this preferred second embodiment which is now to be discussed. The shape of the pipe pieces is the same as described above. Only the finished pipe sections are placed on an endless support conveyor, which has a step-by-step circuit in the manner described above, which could also be referred to as a 1-3 cycle. The two mandrels, from which the finished pipe pieces are pulled, have the same distance that the holders on the endless belt for the finished pipe piece have, plus a holding mandrel arranged between them. In other words, two finished pieces of pipe are drawn onto the endless belt on holders or mandrels, between which another holder or mandrel remains empty. If the endless belt is then moved on by one unit, the stationary mandrels are opposite two holders or mandrels on the endless belt for the delivery of the pipe sections. If these are also provided with pipe pieces after filling, the endless belt is advanced by three units, so that the stationary mandrels for pulling off the finished pipe pieces are in turn opposed to the initial state on the endless belt.

It is also advantageous according to the invention if the outer mandrel of the second outer mandrel wheel has a thin cylinder jacket-shaped wall for receiving the filling bag inside and the holder of the tube piece outside and if the free ring edge of the wall is provided with a thickened edge. As a result, the flanging and welding devices are offered a good abutment, so that flanging or folding and welding can take place particularly reliably.

It is therefore also expedient if, according to the invention, devices for flanging the outer ring edge of the pipe section and welding devices for the second cover part are provided on the second and / or third outer mandrel wheel.

• Figur 1 eine perspektivische Gesamtansicht einer bevorzugten Ausführungsform der erfindungsgemäßen Maschine zur Herstellung der Fließmittelpackungen,
• Figuren 2 bis 8 Einrichtungen zur Erstellung des hohlen Hüllrohrstückes,
• Figuren 9 und 10 Maschinenteile zur Herstellung der Füllbeutel,
• Figuren 11 bis 13 das Vereinigen von Füllbeutel und Rohrstück sowie Verschließen der Packung.

Further advantages, features and possible uses of the present invention result from the present description of a preferred exemplary embodiment in conjunction with the drawings. Show it:

• FIG. 1 shows an overall perspective view of a preferred embodiment of the machine according to the invention for producing the plasticizer packs,
• FIGS. 2 to 8 devices for creating the hollow cladding tube piece,
• FIGS. 9 and 10 machine parts for producing the filling bags,
• Figures 11 to 13, the combination of filling bag and tube piece and closing the package.

• Figur 2 die Draufsicht auf die Gesamtmaschine mit der schräg umgelegten zweiten Materialbahn, d.h. der Folienbahn,
• Figur 3 eine teilweise schematische Seitenansicht entlang der Linie 111-111 in Figur 1, wobei nur die für die Funktion und Erläuterung der Erfindung wesentlichen Teile gezeigt sind,
• Figur 4 eine Draufsicht auf die Anordnung der Figur 3, wenn man von rechts nach links auf Fig. 3 blickt,
• Figur 5 eine Draufsicht auf Figur 4 entsprechend der Linie V-V,
• Figur 6 eine teilweise abgebrochene und teilweise im Schnitt dargestellte Ansicht entlang der Linie VI-VI der Figur 4,
• Figur 7 eine abgebrochene Schnittdarstellung entlang der Linie VII-VII in Fig. 3,
• Figur 8 eine ähnliche Darstellung wie in Fig. 7, wobei jedoch der Endbearbeitungszustand (Randumbördelung) gezeigt ist,
• Figur 9 schematisch das gefüllte Ende der Folienbahn mit Eintritt zwischen die Formschweißketten und Austritt der fertig verschweißten Füllbeutelkette in die abgebrochen dargestellte Muldenkette,
• Figur 10 eine abgebrochene Ansicht ähnlich dem unteren Teil in Fig. 9, wobei die Schneideinrichtung und im rechten Teil der Muldenkette die Förderrinnen dargestellt sind,
• Figur 11 schematisch eine Schnittdarstellung etwa entlang der Linie XI-XI der Figur 10 mit Einsaug- und Ausstoßzustand,
• Figur 12 in vergrößertem Maßstab die in Figur 11 oben an der Station 0 angedeuteten Einzelheiten mit Druckkolben und beweglichen Backen,
• Figur 13 eine ähnliche schematische Darstellung wie Figur 11, hier allerdings das dritte Außendornrad mit Saugkolben in der einen Position, in Uhrzeigerrichtung der nächsten Position, dem Druckkolben und der weiter nachgeschalteten nächsten Position, dem Ausstoßzustand,
• Figur 14 die mit der in Rede stehenden Maschine herstellbare Fließmittelpackung in geschlossenem Transportzustand,
• Figur 15 die Draufsicht auf den abgebrochenen oberen Teil der geöffneten Packung,
• Figur 16 eine Schnittansicht entlang der Linie XVI-XVI der Figur 14,
• Figur 17 eine schematisierte Seitenansicht auf die Gesamtmaschine einer anderen Ausführungsform, bei welcher die erste Fördereinrichtung ein Endlosband ist,
• Figur 18 eine Draufsicht auf die Maschine der Fig. 17,
• Figur 19 eine schematische Schnittdarstellung ähnlich der Figur 11 der oben beschriebenen Ausführungsform,
• Figur 20 eine ähnliche schematische Darstellung wie in Figur 19, wiederum ähnlich der Figur 13 bei der oben beschriebenen anderen Ausführungsform und
• Fig. 21a) - c) schematisch drei Bewegungsabläufe des in den Figuren 17 und 18 gezeigten Endlosbandes.

The individual shows:

• FIG. 2 shows the top view of the overall machine with the diagonally folded second material web, ie the film web,
• FIG. 3 shows a partially schematic side view along the line 111-111 in FIG. 1, only the parts essential for the function and explanation of the invention being shown,
• FIG. 4 shows a plan view of the arrangement of FIG. 3 when one looks at FIG. 3 from right to left,
• FIG. 5 shows a plan view of FIG. 4 along the line VV,
• FIG. 6 shows a view, partly broken away and partly in section, along the line VI-VI of FIG. 4,
• FIG. 7 shows a broken sectional view along the line VII-VII in FIG. 3,
• FIG. 8 shows a representation similar to that in FIG. 7, however, the state of finishing (edging) is shown,
• FIG. 9 schematically, the filled end of the film web with entry between the form welding chains and exit of the completely welded filling bag chain into the trough chain shown broken off,
• FIG. 10 shows a broken view similar to the lower part in FIG. 9, the cutting device and the conveyor troughs being shown in the right part of the trough chain,
• FIG. 11 schematically shows a sectional illustration approximately along the line XI-XI of FIG. 10 with the state of suction and ejection,
• FIG. 12 on an enlarged scale the details indicated in FIG. 11 at the top of station 0 with pressure pistons and movable jaws,
• FIG. 13 shows a schematic illustration similar to FIG. 11, but here the third outer mandrel wheel with suction piston in one position, clockwise the next position, the pressure piston and the subsequent position, the discharge state,
• FIG. 14 the superplasticizer pack that can be produced with the machine in question in the closed transport state,
• FIG. 15 the top view of the broken off upper part of the opened package,
• FIG. 16 shows a sectional view along the line XVI-XVI of FIG. 14,
• FIG. 17 shows a schematic side view of the overall machine of another embodiment, in which the first conveyor device is an endless belt,
• FIG. 18 is a top view of the machine of FIG. 17,
• FIG. 19 shows a schematic sectional illustration similar to FIG. 11 of the embodiment described above,
• Figure 20 is a similar schematic illustration as in Figure 19, again similar to Figure 13 in the other embodiment and described above
• 21a) - c) schematically three movement sequences of the endless belt shown in FIGS. 17 and 18.

1 shows a perspective view of the machine for producing liquid bags 1 in a view from the front and at the top right, the longitudinal direction of the machine being assumed from left to right, which is also the direction of the finishing, in particular the connecting line of the outer mandrel wheels to be described . The housing is partially broken off so that the essential parts of the machine and their assignment can be seen.

A liquid pack 1 of the type described in more detail in FIGS. 14 to 16 with a filling bag 13 and support sleeve 2, 3 is to be produced, which consists of cylindrical jacket-shaped side walls 2 (pipe section) and cover parts 3 and 3 ′ attached to the ends, which have flanged edges 4 or 4 'are connected to the so-called support sleeve pipe section 2. One cover part 3 forms the lid of the liquid pack 1 with a tear strip 5, at the front end of which a gripping tab 6 is formed and under which an inner cover strip 7 with a pouring hole 15 is arranged. The outer cover or tear strip 5 is formed by two parallel cut lines 8 in the cover material 3, which end approximately in the central region of the cover 3 and are connected to one another via fold lines 12 as a hinge at the inner end. In the middle of the folding line 12, a cutting line 11 can alternatively be provided, just as on the opposite side there is a curved cutting line 9 between two short folding lines 10, so that the gripping flap 6 can be placed on the side wall of the pipe section 2 as shown in FIG. 14 and can optionally weld at point 24 in the region of the recess 25 under the pouring edge 26. Welding spots 21 are also provided on top of the inner cover strip 7 for attaching the tear strip 5.

From the sectional view in FIG. 16 one can see the construction with lid 5 and gripping flap 6, which is exaggerated for clarity, under which the inner cover strip 7 is arranged, which forms the pouring edge 26 to the front, under which the trough-like recess 25 is arranged as a pouring aid. One can also see the hole 15 in the inner cover strip 7 and a welding line 18 encompassing this hole in a ring, along which the film or the filling bag 13 is welded to the inner cover strip and thus to the upper cover part 3. The middle upper end is sealed through the hole 15 of the inner cover strip 7 directly onto the undersurface of the cover 3, and it is understood that the path of the filling bag 13 passes through in a sealing manner and is shown schematically only for illustration purposes.

When the user releases the gripping tab 6 from the stitching point 24, grips and thus swings the tear strip 5 from the position of FIGS. 14 and 16 into the position of FIG. 15, the approximately circular part 16 of the filling bag 13, which is inside the ring welding surface 18, automatically becomes is sealed on the inside of the lid 3, torn off with removal of the lid, so that a hole 15 is created as a pouring opening. Nevertheless, the filling bag 13 hangs on the inside of the bag 3, and the user can now start pouring over the pouring edge 26 without difficulty.

The pack of the illustration in FIG. 14 is shown in the finished state in FIG. 1 at the right front and is being conveyed straight in the direction of the curved arrow.

This pack 1 is formed from a first material web 31 made of paper coated with plastic and a second Material web 32 made of a V-shaped plastic film, the fold edge of which, for example in the illustration in FIG. 1, is at the top left and is designated by 33, while the free edges 34 are located on the right.

The roll shown in the foreground of FIG. 1 from the left serves as the first supply point 35 for the first material web, and a zigzag stack, not shown in the figures, in the housing part 36 next to the roll 35 serves as the second supply point. As seen in FIGS. 1 and 2 consequently, the two material webs 31, 32 initially pulled upward from the supply points, which are then pulled parallel to one another in the longitudinal direction of the machine in the direction of arrow 38 via different deflecting rollers 37 and 37 '.

Four processing stations A, B, C and D are connected in series in the conveying direction of the material webs 31, 32. The first processing station A includes molding devices described in more detail below, in particular molding flaps 40 for producing the support sleeve tube piece 2, which is shown separately below, and a first mandrel wheel 41.

The second processing station B arranged behind it comprises the filling device for the filling bags, generally designated 13, in particular the shape welding chains 42 and the trough chain 43.

In the downstream third processing station C, transport channels from the trough chain 43 to a second mandrel wheel 41 a can be thought of as guide channels 45, which are shown in more detail only in FIG. 10. In addition, the third processing station C also includes suction and clamping devices (not shown) for combining the filling bags 13 with the tube pieces which are located in the outer mandrels 50a.

In the fourth processing station D, the third outer mandrel wheel 41b with closing devices 60b for the support sleeve 2, 3, 3 'and a conveyor 70, which removes the finished packages 1 at the end of the machine, are shown upside down so that the lid comes to rest on top , and downstream of the conveyor chains, not shown, in order to pull off the finished packs in accordance with the curved arrow shown on the right in FIG. 1.

In this respect, the overall structure consists of the four processing stations A to D, which are now illustrated in more detail below to explain details.

First processing station A

The axis 46 of the first outer mandrel gear 41 extends transversely to the longitudinal direction 38 of the machine, the axes 46a and 46b of the second outer mandrel gear 41 a and the third outer mandrel gear 41 b being arranged at a distance from one another, parallel and in the same horizontal plane. Each outer mandrel gear 41, 41 a, 41 b is octagonal, the outer mandrels 50, 50a and 50b being attached to the eight intermediate planes in a radially projecting manner. In the direction of the axes 46, 46a, 46b, all three outer mandrel wheels 41, 41a, 41b have four outer mandrels 50, 50a and 50b, one behind the other, on each of the eight planes. Each mandrel wheel thus carries a total of thirty-two external mandrels.

The difference between the first outer mandrel wheel 41 and the other two outer mandrel wheels 41 a and 41 b is, on the one hand, that the first outer mandrel wheel 41 has a mandrel slide 47 which is displaceable in the direction of the axis 46. Another difference is that the first mandrel gear 41 does not have any special pneumatic devices.

The structure of the first processing station A above the first mandrel wheel 41 can be seen from FIGS. 3 to 8. In FIG. 3, the first mandrel wheel 41 can still be seen schematically below, the direction of rotation of which is shown by the arrow 48. A simpler explanation of the first processing station A is obtained by considering the processing of the first material web 31 (plastic-coated paper), ie from top to bottom in FIGS. 1, 3 and 4. After the last deflection roller 37, the first material web 31 is introduced into a plane between a mandrel 100 and the flaps 40 (from right to left in FIG. 4) and cut into two sheets of paper one behind the other by the knife 101, which interacts with a hardened counter-pressure plate 102 , which mean the settlement in about the pipe section 2. A top view of this state can be seen well in FIG. 5, in which the paired arrangement of the flaps 40 relative to the mandrels 100 is also shown. This is the first position I, which is the top position in FIGS. 3 and 4. Below this are positions II to V. The mold flap halves are pivotable about the common shaft 103, which forms a hinge-like connection with a slide 104 which can be moved up and down (in the vertical direction) in such a way that the mold flaps 40 extend out position I can be moved down to position II and back up to position I, while there is also a smaller possibility of movement in the direction transverse to it. In Figure 3, the drive of the carriage 104 and the mold flaps 40 is shown somewhat schematically. The mold flaps 40 are opened and closed via the linkage 105 when the drive rod 106 moves to the left or to the right about the pivot point 107 in the direction of the curved arrow 108. In addition, the curve-controlled drive 109 is shown on the left on the drive rod 106 and in connection with the linkage 105, via which the folding movement of the molded flaps 40 takes place. Rollers 110, 110 'guide the carriage 104 during the up and down movement in rails, which are not shown.

The mandrel 100 is not expressly shown in FIGS. 3 and 4, but the strip 111 arranged in the gap on one side of the mandrel 100 and which is movable in the vertical direction relative to the mandrel 100. The arrangement of the bar is clearly shown in cross section from Figures 5 and 6.

Opposite the movable bar 111, a counter-jaw 112 made of rubber is embedded in the circumference of the mandrel 100. This counter jaw 112, like the water-cooled pressure jaw 113 (FIG. 6), belongs to the sealing station arranged in position II and shown in FIG. 6, which works with hot air flowing out of the gap-shaped mouthpiece 114. The longitudinal seam of the pipe section 2 is created with this sealing station and the pressure jaws 113 which can be moved in the direction of the double arrow 116 by means of the holder 115. This is assisted by pressure rods 117, 117 ', which are attached to the ends of the mold flaps 40 and press the free edges of the pipe piece 2, which has not yet been sealed longitudinally, onto the mandrel 100 in such a way that the remaining merging to form the longitudinal sealing seam can be achieved by the pressure jaws 113 with counter jaws 112 .

In position 111 of FIGS. 3 and 4 there is a preforming for flanging the lower edge 4, as shown in more detail in FIGS. 7 and 8 and explained on the basis thereof.

In Fig. 4 sliding drive jaws 118 and 119 are also shown, which are driven so that they move after completion of the longitudinal sealing seam and opening the flap 40 in position 11 when raising the flap 40 to position 1 from position 119 along the dashed arrow 120 move up to position 119 'so that the pipe section 2 is pulled down after the flaps 40 have been folded in position I when the carriage 104 is moved down from position II into position III. The intermittent pulling down of the pipe sections from position 111 to position IV also takes place, at the lower end of which the end of the mandrel 100 is also located. The lower level, designated by 121, can be found in the illustration of FIG. 7 on an enlarged scale.

This figure 7 shows the flanging tool consisting of part 122 on the one hand and the flanging tool, generally consisting of 123 on the other hand, the parts of which actually act are the flanging ring 124 with support part 125, both of which can be moved vertically upwards and downwards because they are held by the outer holder 123 via a resilient ring 126, which is vulcanized onto the metal parts, are connected in an elastically movable manner. FIG. 7 also shows a recess 25 'in the mandrel 100, on the outside of which a projection of a piston which can be moved in the horizontal direction and is to be thought of is conceivable. Instead of the piston with the projection, only the holder generally designated 123 and the pressure chuck 127 are shown in the section selected here.

While FIG. 7 shows the state before the flanging, FIG. 8 shows the final state in which the annular edge 4 has already been formed on the pipe section 2. As a result of this inwardly projecting edge 4, the pipe section 2 cannot be drawn onto an inner mandrel, which is why the mandrel wheels 41, 41a, 41b have outer mandrels 50, 50a, 50b. These are hollow mandrels equipped on the inside with corresponding dimensions for receiving the tube pieces 2, which are referred to as external mandrels in this description.

However, before the further processing of the support sleeve tube pieces 2 is followed, the creation of the filling bag will first be described.

Second processing station B

In this processing station, devices for producing filled filling bags are arranged which are produced from the second material web, that is to say a double-layer plastic film web which is designated by 32 in FIGS. 1 and 2 and has cover parts 3, 3 'sealed on two diametrically opposite ends .

The second material web 32, which is initially conveyed in the machine longitudinal direction 38, is deflected via a deflection roller 130 (FIG. 11 vertically upwards into the higher area of the overall machine and then meets a second deflection roller 131, the axes of the two rollers 130, 131 lying in horizontal planes which are in the The axis of the upper deflecting roller 131 is at an angle a of 45 ° relative to the axis of the deflecting roller 130. In this way, the angle a also shown in FIG. 2 is achieved or the film web 32 is achieved now at 45 ° from the rear area of the overall machine (top in FIG. 2) to the front area, namely in front of the outer mandrel wheels 41, 41 a, 41 b, in the embodiment shown here, the last part runs of the unfilled and one-sided open film tube vertically from top to bottom .. The web will be engaged in pairs next to the fold line 33 Nde belt conveyor 133 is moved, the lower drive gear takes along an axis 134 a pressure wheel 135, which (not shown in Fig. 1) opposite another pressure wheel runs so that the longitudinally sealed seam freshly produced by the hot air nozzle 136 (longitudinal sealing station) and squeezed is solidified.

Above the longitudinal sealing station 136, the filling tube 137 leads into the still open slot between the edges 34 of the film web 32 in order to extend below the supporting control ring 138 and end there in a filling nozzle.

Below this filling station, two form welding chains 42 are arranged opposite one another in pairs, which generally work vertically, as can be clearly seen in FIGS. 1 and 9. By means of the support ring 138, the film web is shaped into a round cross section and is brought together in a V-shape via two further support belts 140, 140 'in such a way that the part of the film web leaving the support belt 140, 140' enters, so to speak, the tubular space 141 flows in, which is formed by the respective space halves 142. By comparing the form-welding chains 42 in pairs, a plurality or row of tubular spaces 141 results in the vertical direction, the first space 141 being in the open position, and somewhat further down the space 141, which in FIG. 9 is like the others underlying rooms is shown closed. The filling volume of the respective filling bag 13 is predetermined by these spaces 141.

Welding jaws 143, which are not described in greater detail, work together with opposing counter jaws 144, so that the film web 32 has transverse sealing seams, which are identified by 145 in FIG. 9 below.

The trough chain 43, which can be seen in FIGS. 9 and 10, is arranged below the form welding chains 42 as a transverse distribution conveyor. This trough chain is endless and is guided approximately horizontally around two horizontal axes 146 arranged at a distance from one another. The troughs 147 are each formed from two trough-shaped parts 148, two of which can be recognized individually in FIG. 10 by the deflection belt gearwheels on the right and left. Between the troughs or in the middle upper area of the molded parts 148 there is a recess 150 for the knife 151 in the cutting device, generally designated 152.

The troughs 147 are relatively wide, so that the filling bags 13 come in an oval shape when they are free in the troughs 147. As a result, the distance between successively arranged troughs 147 is made large, with the advantage of better design freedom for downstream units.

The second processing station B ends with the trough chain 43, on which filling bags 13, separated from one another in parallel, are now arranged so that the line from cover 3 to floor 3 'lies in the machine longitudinal direction 38.

(The trough chain 43 rotates continuously, and ejection devices, not shown, with clamping devices each push four filling bags 13 into the guide troughs 45, which are shown in the next processing station C).

Third processing station C

In this processing station C there are guide channels 45 as transport devices with devices for combining the filling bag 13 and pipe section 2, which also includes the second mandrel wheel 41 b.

The inlet-side distance of the guide grooves 45 from one another shown in FIG. 10 is smaller than the outlet-side distance shown below, as a result of which the distance between the filling bags 13 which are still relatively close to one another on the trough chain 43 is spread out toward the second outer mandrel wheel 41a.

The second and third outer mandrel 41 a, 41 b have pneumatic devices, not shown, with which negative and positive pressure can be generated.

In FIGS. 11 and 13, openings 49a, 49b are shown, which are assigned to each of the flat eight surfaces, so that each of the eight stages can be subjected to positive or negative pressure. Note, for example, the areas with negative pressure, which are designated by 161 and those with positive pressure, which are designated by 162. The flow agent filling the filling bag 13 is designated 163. It has already been mentioned above that all outer mandrel gears 41, 41a, 41b have four outer mandrels 50, 50a, 50b on each working surface in the direction of their axes 46, 46a, 46b: in the 12 o'clock position of the second outer mandrel gear 41a and also the third Outer mandrel wheel 41b are arranged welding devices generally designated 60a or 60b (eg mandrel position 0 in FIG. 11). FIGS. 11 and 12 show the linearly movable pressure piston 165, which is arranged in the vertical direction and is controlled via the cam disk 166.

Another cam control disc 167 moves arms 168 around the pipe section 2 at the top 4 around hot jaws 169, which can be moved apart or moved into the position shown in FIG. 12 according to the control according to the curved arrows 170. The jaws 169 therefore do not provide a real seal with penetration of the heat by paper webs, but the heated jaws merely heat the plastic layers on the annular rim 4 at the top and the corresponding annular lower peripheral surfaces on the lid 3, then remove according to the arrows 170 shown ( Fig. 12), after which the pressure piston 165 creates the final connection. The back pressure to the pressure piston 165 is applied with the stiffness of the material of the pipe section 2.

The second outer mandrel wheel rotates accordingly 11 clockwise to the right, and in the next position to the right of the uppermost position 0, a pressure finger 171 is schematically indicated, which is able to press the gripping tab 6 in the manner shown (see curved arrow 172).

Fourth processing station D

In this station, the third outer mandrel gear 41b is rotatably arranged in the same direction of rotation, with devices not shown being provided, from FIG. 11 in FIG. 13 according to arrow 173, a pipe section 2 closed on one side from the second outer mandrel gear 41a to a mandrel 50b of the third outer mandrel gear 41b to promote.

FIG. 13 shows the suction device 174 in the form of a suction piston which can move in the direction of the double arrow 175 and in this way can pull the cover part 3 '(floor) out of the space in the edge 4' into the positions in FIG. 13 . In the next position there is again the cover part welding device 60b, in which the pipe section 2 is completely closed in a manner similar to that shown in FIG.

When the machine is operating, the first material web 31 is guided into the position in FIG. 5, cut by the knives 101 and placed around the mandrel 100 by means of the mold flaps 40.

Together with the flaps 40, the carriage 104 moves from the position into the position II (FIGS. 3 and 4), so that the hot air from the nozzle 114 activates the longitudinal sealing seam (FIG. 6) and the longitudinal sealing by the movement of the pressure jaw 113 in the direction of the double arrow 116 is first carried out on the counter jaws 112. The sliding drive jaws 118 move the tube piece 2 with the finished longitudinal sealing seam to position I after opening and raising the mold flaps to position I, when they move back down to position II at the next work cycle, to position 111. At the lower end of position 111, the preforming for flanging takes place, which ultimately takes place at the lower end of position IV, as shown in FIGS. 7 and 8. The flanging ring 124 folds the free lower edge in such a way that the edge 4 according to FIG. 8 is created. The recess 25 (FIGS. 14 to 16) is also pressed in at one point.

After the cladding tube piece 2 thus has the edge 4 at the lower end, it is again moved via sliding drive jaws 113 from the IV position shown in FIGS. 3 and 4 to the lowest position V, i.e. pushed into an outer mandrel 50 of the first outer mandrel wheel 41. This outer mandrel wheel 41 rotates counterclockwise according to arrow 48 in order to provide the flanging of the opposite edge 4 'in the same manner in one of the next switching stages in a manner not shown. Otherwise, no further processing takes place until the four pipe sections lying one behind the other have been rotated into the 3 o'clock position of the first mandrel wheel 41. Then, in a further manner, not shown, the technically easily feasible transfer of the prepared pipe section 2 to the second outer mandrel wheel 41 a takes place.

In the meantime, the filled filling bag 13 must be completed by the time of the union. For this purpose, the described second material web 32, the film web provided with the cover parts 3, 3 ', is pulled off and guided into the correct angular position via the deflection rollers 130 and 131. The one cover part 3, which will later be the cover, is sealed together with the inner cover strip 7 (FIGS. 14 to 16) onto the film 32 (sealing surface 16, 18). According to FIG. 1, the film web 32 first moves over the filling tube 137 and then around it outside into the longitudinal sealing station 136, where a longitudinal sealing seam is created by hot air and the squeeze rollers 135. Below, i.e. in the area of the cooled and tight longitudinal sealing seam, the liquid level lies, for example, in the area or under the supporting control ring 138. Via this, the film web 32 is pulled further down over the conveyor belts 133 between the form welding chains 42, in which tubular spaces 141 are formed, which are formed by the corresponding parts of the film are completely filled. If, in the course of the vertical downward movement with the main runs of the shape welding chains 42, the sealing takes place between the half-shells or spatial shape halves 142 to form the transverse welding seams 145, then the chain of filling bags 13 lying one behind the other is shown in FIG. 9.

The filling bags 13 are separated from one another by the knife 151 penetrating into the recess 150 of the cutting device, generally designated and shown as 152 in FIG. 10, and lie in wide troughs 147 of the trough chain 43.

Now we turn back to Figure 11 and consider the 11 o'clock position of the second outer mandrel gear 41 a as a sectional view along the line XI-XI of Figure 10. Here you can see the filling bag 13 filled with liquid 163, at the front end of which the bottom forming cover part 3 'and at the rear end of which the cover part 3 forming the cover are welded. One has to imagine a clamping device, not shown, which holds the lid 3 so that the filling bag 13 does not rotate about its own longitudinal axis.

The second outer mandrel gear 41a controls its pneumatic device so that the openings 49a in the 11 o'clock position are switched to suction operation, so that the negative pressure denoted by 161 results in this space in the outer mandrel 50a. That way the filling bag 13, which has already pushed halfway into the outer mandrel 50a, is drawn in further and favorably by filling the interior of the pipe section 2 due to the action of the negative pressure 161. It does no harm if the bottom 3 'in the edge 4' remains in the position shown in the 12 o'clock and 2 o'clock positions. It is only important that the cover 3 is placed flat and flat on the upper edge 4, as shown in the 12 o'clock position, which is also denoted by 0 above. The gripping tab 6 projects beyond the edge on the right, although the tab in the illustration of FIG. 12 happens to protrude to the left. The hot jaws 169 heat up the plastic surfaces to be activated, then move away according to the arrows 170, after which the pressure piston 165 presses the lid 3 onto the edge 4.

After the second outer mandrel wheel 41 has rotated into the next, 2 o'clock position, the pressure finger 171 moves according to the curved arrow 172 against the gripping tab 6 and seals it at the previously activated point 24.

After switching the first outer mandrel wheel 41a a to the 3 o'clock position, compressed air 162 is pressed into the space under the floor 3 'inside the outer mandrel 50a via the openings 49a, so that the one-sided closed and / or other conveying devices, not shown, thereby Liquid pack is guided in the direction of arrow 173 on the third mandrel gear 41 b, ie in the corresponding and aligned outer mandrel 50b.

This is rotated at the next work cycle to the 11 o'clock position, in which a suction piston 174 according to double arrow 175 moves into the open end of the pipe section 2, grips the cover part 3 'and pulls it out into the position shown in FIG. The suction air is then switched off and the third outer mandrel wheel 41b moves with this row of outer mandrels 50b into the 12 o'clock position. Here, the sealing is carried out with the welding station 60b in a manner similar to that explained with reference to FIG. 12. The now completely closed package shows an almost 100% filled filling bag 13, but small air volumes between the envelope and the filling bag. If the packaging is opened in the manner described at the outset, the liquid level drops immediately after opening and spillage is prevented.

After leaving the 12 o'clock position, the third outer mandrel wheel 41 b rotates the pack row in question into the 2 o'clock position, overpressure 162 is generated via the openings 49 b, and the finished pack can be ejected so that it is pulled up via the conveyor 70 (Figure 1) and upside down on another conveyor, not shown, is placed so that the lid is on the top and the bottom of the pack below.

In Figure 17 one looks at a similar machine of Figure 1 from left front to right rear, i.e. FIG. 17 shows a side view of the overall machine, although this is another embodiment of the machine, namely that with the endless belt as the first conveyor. The processing stations connected in series are again shown in the conveying direction of the material webs 31, 32, but here only the stations A, C and D are of interest. The first processing station A includes the molding devices already described above, in particular the molding flaps 40 for creating the support sleeve tube piece 2, as described above in connection with the first embodiment. Of particular interest for station A is the endless belt 200 as the so-called first conveyor.

The filling device for the filling bags 13 with the shape welding chains 42 and trough chain 43 are not described further here, because they are designed similarly to the first embodiment described above.

In the downstream third processing station C, guide channels 45, not shown in detail, are provided as transport devices from the trough chain 43 to a so-called second mandrel wheel 41 c, as described above. In addition, the third processing station C includes suction and clamping devices for combining the filling bags 13 with the tube pieces 2, which are located on outer mandrels 201 on the endless belt 200.

In the fourth processing station D, the so-called third outer mandrel wheel 41d with closing devices 60d for the support sleeve 2 and the cover parts 3, 3 'as well as a conveyor 70 are shown, which removes the finished packs 1 at the machine end and processes them further as above in connection with the first Embodiment has already been described.

Endless belt in the first Processing station A

Instead of the first outer mandrel wheel 41 in the other embodiment described above, as shown in FIGS. 17 and 18, the first conveyor device that receives the pipe pieces 2 is an endless conveyor belt 200 that rotates around vertical axes 202 and on which holders or outer mandrels 201 are fastened at regular intervals. The distance of every second outer mandrel 201 from the next but one is equal to the distance between the two mandrels 100 shown in FIG. 17 above.

In the top view of FIG. 18 one can see three vertical axes 202, around which the endless belt 200 is placed so that it follows approximately the shape of a triangle. The upper cathete shown in FIG. 18 runs under the mandrels 100, the hypotenuse then conveys the one with the Pipe pieces 2 provided outer mandrels 201 in the so-called second mandrel wheel 41c in station C for transfer from the endless belt 200 to the outer mandrel 50c of the mandrel wheel 41c; and in FIG. 18 along the other cathete back to the starting point, this cathete running parallel and along the second outer mandrel wheel 41.

The work cycle of this endless belt 200 takes place in steps 1-3, 1-3 etc., as will now be explained with reference to FIG. 21. In the three movement stages a), b) and c) of FIG. 21, the two lower mandrels 100 are shown at level 121 in the upper line, while the outer mandrels 201 of the endless belt 200 are indicated in the line below. While the mandrels 100 for producing the pipe sections 2 are stationary, the endless belt 200 moves in the direction of the arrow 203. The individual outer mandrels 201 are labeled a, b, c, d, etc. in FIG.

In operation, according to state a) in FIG. 21, the empty outer arbors a, b, c, d, e, etc. are initially under the mandrels 100 provided with pipe pieces. More specifically, the outer arbors a and c are for receiving the pipe pieces 2 from the mandrels 100 opposite the latter. The pipe sections, not shown, are now transferred.

In the state of FIG. 21b there are already pipe pieces on the outer mandrels a and c, and on the stationary mandrels 100 there are again new pipe pieces for delivery to the next outer mandrels. These next outer mandrels b and d lie opposite the stationary mandrels 100 because the endless belt 200 has moved one state from state a) to state b). The pipe pieces can now again be transferred from the mandrel 100 to the mandrel b or d.

If the endless belt 200 now moves three units further, the state c) shown in FIG. 21 is reached. Here the outer arbors a, b, c and d are each provided with a piece of pipe, the outer arbors e, f, g, h, i are still free. It is again the initial state according to FIG. 21 a. reached, only that the outer mandrels e and g now face the stationary mandrels 100, while in FIG. 21 a the pipe sections 2 have been transferred to the outer mandrels a and c.

So much for the explanation of bars 1-3 of the endless belt 200.

After the pipe section 2 in station C under the lower outer mandrel 50c of the second. Guided outer mandrel wheel 41 and pushed up on this outer mandrel 50c, the tube piece 2 and the filling bag 13 are combined in a manner similar to that in FIGS. 11 and 13 of the first embodiment.

The difference between FIGS. 11, 13 on the one hand and 19, 20 on the other hand is that the filling bag 13 is only provided with a cover part 3 at one end in the second embodiment to be described now.

FIG. 19 shows the processing station C in which the guide troughs 45 are located as a transport device. These are constructed similarly to the embodiment described above, so that further explanation is unnecessary here. The second and third outer mandrel gears 41c and 41d also have pneumatic devices, not shown in detail, in the second embodiment, with which negative and positive pressure can be generated in the manner described above. The corresponding openings and connections for the eluent are not shown here. The structure of the outer mandrel gears is similar to those designated 41 a and 41 b in the first embodiment. In the 12 o'clock position of the second outer mandrel gear 41c and also that of the third outer mandrel gear 41d, welding devices generally designated 60c or 60d are arranged (e.g. mandrel position 0 in FIG. 11). The cam control takes place in a manner similar to that described above in connection with FIGS. 11 and 13.

In the operation of the second embodiment of the machine, after the pipe section 2 has been transferred to the lower outer mandrel 50c of the second mandrel wheel 41c in the direction of the arrow 204, the state 1 'is reached in which the pipe section 2 is open at both ends.

Incidentally, it can be seen from the outer mandrels 50c that it has a thin cylindrical jacket-shaped wall, for example with a wall thickness of 1/10 mm to 5/10 mm, while the free ring edge 50c 'of the wall is provided with a thickened edge. The outer ring edge 2 "of the pipe section 2 projects beyond the thickened free ring edge 50c 'in position 1' according to FIG. 19.

Since both outer mandrel gears 41c and 41d rotate clockwise, the pipe section 2 is next switched to the state 2 '. The free ring edge 2 "is preformed here by means of internal and external tools which can be moved in the direction of the arrow.

After switching to position 3 ", the flanging is carried out by means of flanging devices 205. After switching to position 4 ', the filling bag 13 reaches the space inside the outer mandrel 50c in the same way as in the embodiment described above, but with two differences: First, the filling bag 13 is only provided with a single cover part 3 at one end, and secondly, the outer mandrel 50c itself is located between the filling bag 13 and the pipe section 2.

After switching to position 5 ', the cover part 3 is sealed by means of the welding device 60c. After switching to position 6 ', no further processing takes place, so that practically the final state as in position 5' is retained. In position 7 'the tube piece 2 with the filling bag 3 located therein is dispensed, closed on one side in the same way as in FIG Described in connection with Figure 11 in the 3 o'clock position.

In position 7 ', the transfer from the second mandrel gear 41 c to the third mandrel gear 41 d, which is shown in FIG. 20, takes place. After switching to position 8 ', the sharp other circular edge of the pipe section is flanged by a grooving tool 206.

In position 9 'you can already see the flanged circular edge onto which another cover part 3' 'is now sealed in a manner known per se.

The new cover part 3 "'comes from a feed roller 206, which is indicated in FIGS. 17 and 18. From this, a coherent band 207 with the new cover parts is pulled off, separated and brought into the positions above the third outer mandrel wheel 41d d. There are 18, in the left third of the processing station D, these cover parts 3 "'are shown spaced apart.

These cover parts preferably consist of a circular disk made of plastic, which has very elastic properties. For example, for these cover parts 3 "', linear polyethylene can be used as the material, which has large elongation values. This gives the possibility of increasing the volume in the event that the all-round sealed package is pushed open or opened. The inner bag strikes the outer one when it is pushed open or opened Sleeve and can create a reserve volume when using the very elastic plastic, so that the packaging does not burst. The plastic disc 3 "'can stretch. In this way, shockproof packaging is obtained.

The pack 1, which is closed on all sides in the position 9 'of the third outer mandrel wheel 41d, is dispensed in the position 10' in the same way as shown and described in FIG. 13 at the top right. The finished package 1 is brought onto the discharge conveyor 70 by means of exhaust air and is transported there.

Claims (21)

1. A machine for manufacturing packs (1) for flowing materials, comprising a filling bag (13) inside and a support case (2, 3, 3') outside, characterised in that:

- there are provided two separate supply locations (35) for drawing off two webs of material (31, 32) for successively disposed prccessing stations (A, B, C, D),

- provided in the first prccessing station (A) are shaping means (40) for producing a support case tube portion (2) from the first web of material (31) and a first conveyor means (41) which receives the tube portions (2);

- provided in the second prccessing station (B) are means (42) for producing a series of filled individual filling bags (13), which are arranged in side-by-side relationship, from the second web of material (32);

- provided in the third processing station (C) are transporting devices (45) and means for joining a filling bag (13) and a tube portion (2), with a mandrel-bearing wheel (41 a); and

- provided in the fourth processing station (D) are closure means (60b) for the support case (2, 3, 3') and discharge conveyors (70).

2. A machine according to claim 1 characterised in that the first web of material (31) is stored on a roll (35) as the supply location and comprises a web of paper which is coated with plastics material at least on one side, and that the second web of material (32) is mounted in the form of a zig-zag stack as the supply location and comprises a doubled foil web of plastics material with cover portions (3, 3') sealed thereon at at least one end and possibly at two diametrally oppositely disposed ends.

3. A machine according to claim 1 or claim 2 characterised in that the shaping means (40, 100, 122, 123) of the first processing station (A) has shaping flaps (40) engaging around a mandrel (100), with a sealing station (12-116), and two edge flanging-over stations (122-127), and that the mandrels (50, 50a, 50b) of the mandrel- bearing wheels (41, 41a, 41 b) are external mandrels.

4. A machine according to one of claims 1 to 3 characterised in that, as considered in the direction of conveying movement of the first web of material (31), arranged beside a first position (I) of the shaping flaps (40) which can be moved into at least one second position (II) and back again and which are mounted on a carriage (104) are cutting means (101, 102) for separating flat web portions, arranged therebehind and preferably operating with hot air are sealing stations (112, 113) in the second position (II) and arranged therebehind in a further position (IV) is a movable flanging tool (122-127), and that the mandrel (100) is mounted stationarily and extending at least from the sealing station (position 11) to the flanging tool (position IV).

5. A machine according to one of claims 1 to 4 characterised in that disposed at a location at the periphery of the rearmost end of the mandrel (100) is a recess (25') co-operating with a piston projection, to provide a pouring edge (25, 26) on the pack (1).

6. A machine according to one of claims 1 to 5 characterised in that the first conveyor means (41) which receives the tube portions (2) is a first mandrel-bearing wheel (Figures 1 and 2).

7. A machine according to one of claims 1 to 6 characterised in that the first external mandrel- bearing wheel (41) has two external mandrels (50), in the directicn of its axis (46), at each working surface, and preferably four external mandrels (50), displaceable in the axial direction on a mandrel carriage (47).

8. A machine according to claim 1 or claim 2 characterised in that the means for producing the filling bags (13) in the second processing station (B) comprise at least two direction-changing rollers (130, 131) which are disposed relative to each other at an angle (a) of about 30° to 60°, preferably 45°, also a longitudinal sealing station (136), a filling pipe (137), shaping welding chains (42) arranged therebeneath, a transverse distribution conveyor (43), separating means (150-152) and discharge means.

9. A machine according to one of claims 1, 2 or 8 characterised in that the axes of the two direction-changing rollers (130, 131) each lie in a horizontal plane, and the filling pipe (137) and the mutually oppositely disposed shaping welding chains (42) which cooperate in pairs to form a row of tubular spaces (141) are arranged extending substantially in a vertical direction, above the horizontal planes of the axes (46, 46a, 46b) of the external mandrel-bearing wheels.

10. A machine according to one of claims 1, 2, 8 or 9 characterised in that a control ring (138) for supporting the web of material (32) hot air nozzle, over the two shaping welding chains (42), within the second web of material (32), and engaging around the filling tube (137) at a spacing therefrom.

11. A machine according to claim 1, claim 2 or claim 8 characterised in that the transverse distribution conveyor (43) comprises an endless trough-forming chain (43) which is guided (146), the chain (43) having cutting means (150-153) disposed between the troughs (147) thereof, for separating the filling bags (13).

12. A machine according to one of claims 1, 2 and 8 to 11 characterised in that discharge conveyor devices with clamping means are arranged to act transversely with respect to the direction of conveying movement of the trough-forming chain (43).

13. A machine according to claim 1 or claim 2 characterised in that the transport devices (45) in the third processing station (C) have at least two and preferably four guide channels (45) which are arranged in side-by-side relationship and which are disposed transversely with respect to the direction of conveying movement of the trough-forming chain (43) and which are arranged inclinedly with respect to the horizontal, the spacing between the guide channels at the entry end thereof being smaller than at their discharge end.

14. A machine according to one of claims 1, 2 or 13 characterised in that the mandrel-bearing wheel (41) with the joining means for the filling bags (13) and the tube portions (2) is in the form of a second external mandrel-bearing wheel (41 a) and is provided in the direction of its axis (46a) at each working surface with two and preferably four external mandrels (50a), and pneumatic means for producing a reduced pressure (161) and/or an increased pressure (162) in at least some external mandrels (50a).

15. A machine according to one of claims 1, 2, 13 and 14 characterised in that provided at a mandrel position (0) on the second external mandrel-bearing wheel (41 a) is a welding means (60a) for welding on a first cover portion (3) for closing the case tube portion (2) at one end thereof.

16. A machine according to claim 15 characterised in that the welding means (60a) comprises a pressing piston (165) which is arranged movably vertically over the middle upper position (0) of the external mandrel (50a) and, beside the pressing piston, hot pressing jaws which embrace the cuter free end of the extenial mandrel (50a) and which are movable substantially transversely with respect to the direction of movement of the pressing piston (165).

17. A machine according to claim 1 or claim 2 characterised in that in the fourth processing station (D) a third external mandrelbearing wheel (41 b) is arranged beside the second external mandrelbearing wheel (41 a), with the same number of external mandrels (50b) and with its axis (46b) parallel and being rotatable in the same direction of direction (48b), and there are provided a means for transferring case tube portions (2) from the second to the third external mandrel-bearing wheel (from 41 a to 41 b) and a welding means (60b) for welding on a second cover portion (3') for completely closing the tube portion (2).

18. A machine according to claim 17 characterised in that the third external mandrel- bearing wheel (41 b) has pneumatic means for producing reduced and/or increased pressure (162) in at least some external mandrels (50b) and that a discharge conveyor (70) is arranged on the side of the third external mandrel-bearing wheel (41 b) which is opposite in relation to the second external mandrel-bearing wheel (41 b).

19. A machine according to one of claims 1 to 5 characterised in that the first conveyor means (41) which receives the tube portions (2) is an endless belt (200) which passes around vertical axes (202) and which can be advanced alternately by one and by three units (cycle 1-3) (Figures 17 to 21).

20. A machine according to one of claims 1, 2 or 19 characterised in that the external mandrel (50c) on the second external mandrelbearing wheel (41 c) has a thin wall in the form of a cylindrical jacket, for accommodating the filling bag (13) inside and for holding the tube portion (2) outside, and that the free annular edge (50c') of the wall is provided with a thickened edge portion (Figures 19 and 20).

21. A machine according to one of claims 1, 2, 19 or 20 characterised in that provided at the second (41 c) and/or third external mandrel- bearing wheel (41 d) are means (205) for flanging over the outer annular edge (2") of the tube portion (2) and welding means (60c, 60d) for welding on the second cover portion (3") (Figures 19 and 20).

Images