DE2402137B2 - DEVICE FOR MANUFACTURING SQUARE-SHAPED PACKAGING CONTAINERS FROM TWO U-SHAPED CONTAINER PARTS - Google Patents

Description

[ig. in the from the wall and floor parts of the Formed pieces formed corner areas are drawn in or pressed in. The inventive Device has already proven itself to be excellent. The process is much more continuous than that known device and also allows sine high production speed.

It when the wings have curved end surfaces and rolling surfaces that on the bottom parts or the leading surfaces of the upright Bandteüe can be rolled. Because of this Rolling, a jerky forward movement of the strip is alleviated and the continuity of the Process further improved.

Further advantageous developments and improvements of the invention are claimed in the subclaims and are also explained in more detail using the following description of the figures. In the drawing shows

F i g. 1 a schematic front view of a packaging machine, in which the device according to the invention is used,

F i g. 2 schematically the device drive, FIG. 3a and 3b a drive device in detail,

4a to 4f again schematically show parts of the device according to the invention in a temporal manner progressive cycle in forming the U-profiles from the strip and

Fig.5a and 5b a contiguous series of cuboid packaging container or a single one of these containers.

At the outset it should be noted that the device at very many different packaging materials can be used, but especially in the case of plastic films, plastic-coated papers, plastic laminates, possibly using a metal foil, but also with Packaging material which has foam at least as a partial layer, for example using of polystyrene foam.

To understand the device according to the invention to improve, hereinafter the packaging machine in which the device is used, such as briefly explained below:

According to FIG. 1, the packaging machine has a Housing 1, a device 33 for treating and finishing the packaging containers produced and an automatic packing device 35. A material container 58 comprises a number of roller stands with magazine rolls 8,9 for packaging material on which packaging material strips are wound are, which in the present case consist of expanded, foamed plastic tape made of polystyrene, the is coated on one or both sides with layers of homogeneous polystyrene. Albeit different Materials or material combinations can be used as packaging material, such as plastic film, plastic coated paper, plastic and paper or other laminatable Materials coated metal foil, it is therefore assumed in the following description that the Packaging material a tape or strip of foamed plastic, e.g. B. polystyrene foam, represents which at least on one side a layer of homogeneous plastic, z. B. polystyrene. The two strips, which are put together after molding and tightly connected to each other, do not necessarily have to be of the same strength. For the sake of simplicity, however, it will be described in the following assumed that the strips of packaging material consist of similar materials and about have the same strength. However, one of the two strips, namely the one over the feed drum is fed, be considerably wider than the other strip, which is made by means of a molding tool is shaped.

The strips 5 and 6 are unwound from the magazine rollers 8 and 9 and guided over guide rollers 25. A magazine roll 10 carries strip-shaped cover material 7 made of homogeneous plastic, which for Covering of openings in the finished packaging containers is determined.

The housing 1 or the frame carries a rotatable feed drum 23, over which the strip 6 from Packaging material is guided, and on which operations along the circumference of the feed drum 23 distributed stations are running. This scope is in the embodiment shown in divided into twelve sections or segments 202. The packaging machine further includes a molding device 2 for forming the strip 5, it comprises movable formers 4 attached to an endless chain are attached, which rotates clockwise in Fig. 1, furthermore a molding tool 3, which is designed as a rotatable, double-armed wing by means of which the strip 5 is brought into contact with the formers 4 to form a series of interconnected U-shaped sections or parts. the Feed line 20 guides the filling material into the packaging container. A control valve 2t is used to control the filling quantity flowing through the filling pipe 19. The machine also has heating devices 15 a hot air source 22. A carrier 13 that can be moved back and forth is connected in a to the housing 1 Out of bearing 14 and carries a guide device 16 designed as a folding tool, a sealing device 17 and a cutting tool IB, which are all together with the carrier 13 on its back and move around. This back and forth movement is coordinated so that the carrier 13 is synchronous with the forms 4 moved downwards and backwards much faster upwards.

The finished packaging containers 30 are transferred from the molds 4 of the molding device 2 to the finishing device 33 transferred by means of a conveyor belt 28 designed as an endless belt, which between two end rollers 29 serving as guide rollers and a transport or drive wheel 7.7 running which is arranged between the end rollers 29. Sealing fins are placed in the finishing device 33 or the like moved so that they give the packaging containers 30 a more attractive appearance and free them from protruding corners or edges, over which the packaging containers 30 when Could get caught in each other during transport or storage. The packaging containers 30 are in a endless chain held in the finishing device 33, which has protruding parts, the have intermediate spaces between them, into which the packaging 30 can be entered with the aid of a conveyed item 31 can be introduced, which runs around an end roller 32 and the end roller 29 already mentioned. the Machining is carried out by means of a machining tool 36, whereupon the packaging containers 30 are finally delivered to the automatic packing device 35 by means of a device 34, from which the packaging containers 30 are placed in shipping cartons or baskets for distribution.

How the machine works

From the magazine roll 8, a strip 5 of packaging material is first unrolled, which has a Guide roller 25 is performed. The strip 5 is unwound with the aid of a drive roller 24 which is of a Photocell arrangement with two photosensors 11 are controlled. If the tape length of the Strip 5 is unwound by means of the drive roller 24, covers the loop of the strip 5 according to Fig. 1 the lower photocell sensor 11 and a pulse is emitted, which the drive device for the drive roller 24 stops. The strip feed is thus also stopped, so that the loop is reduced. When the loop has become so small that it exposes the photocell sensor 11, the tape feed is turned off switched on again. The strip 5 is in contact with the mold pieces 4 of the molding device 2, which are arranged on an endless chain that moves at constant speed in a closed track moves. The strip 5 is made by means of a rotatable and pivotable double-armed Mold 3 brought exactly into contact with the molded pieces 4 and thereby in an endless row folded by U-shaped parts, which move downwards at a constant speed of the molding device 2 can be molded.

The second strip 6 is unrolled from its magazine roll 9 and guided over a guide roller 26 and then brought into contact with the feed drum 23. The webs 202 of the feed drum 23 have as Mold surfaces a width approximately equal to the distance between two successive molded pieces 4 of the Molding device 2 corresponds. The feed drum 23 rotates at a constant speed while an oscillating plate 59 moves around the feed drum 23 in an oscillating rotary motion. The swing plate 59 carries processing devices such as a punch, an application device 60 for a cover strip, a forming and cutting tool 61 and a heating device 62. If the second strip 6 with Aid of the feed drum 23 at the processing stations of the devices or tools 60, 61 and 62 is passed, holes are punched in the strip 6, a cover strip is applied over the holes, the strip 6 is heated and possibly thermoformed, as well as edge regions of the strip 6 cut at right angles to its longitudinal direction. A third strip 7 is made from the magazine roll 10 homogeneous plastic, which by means of the application device 60 for the cover strip over the Hole is brought so that this is closed. Furthermore, by means of the application device for the Strip 7 cut off its front end so that this to cover the hole from the rest Strip 7 is separated. The one with the slots on its side is approximately the height of the molded pieces 4 strips 6 provided with corresponding length edges with the hole and the opening device in FIG The shape of the applied cover strip 7 is determined by means of the feed drum 23 at the same speed as the shaped pieces 4 moved further, wherein the strip 6 is advanced until its central area over the upper ends of the shaped pieces 4 is arranged, while the slotted side regions of the strip 6 protrude laterally over the fittings 4. The strip 6 with the help of the feed drum 23 so fed that the strip slots directly in extension of the upright standing partitions of the fittings 4 are aligned.

While the strip 6 is moved on by means of the feed drum 23 synchronously with the shaped pieces 4, the carrier 13 assumes its upper end position and begins a downward movement, which is also takes place synchronously with the movement of the fittings 4. Via the hot air line 22

ίο connected heater 15 becomes hot air blown through the holes, which are in a special pattern next to the underside of the edge zones of the Strip 6 are arranged, which are limited by the slots, whereby the strip material smoothed and is activated for sealing and at the same time the edge zones of the same on the lateral edges of the Molds can be heated by blowing hot air on them.

Simultaneously with the heating of the edge zones of the strips 5 and 6, which are tightly connected to one another are to be, with the support of the heating device 15 through the slots in the strip 6 formed flaps 64 or flaps folded down, with the help of folding wings of the FaIt or Guide device 16 against the sides of the moldings 4. This results in the edge zones of the tabs of the strip 6 and the edge zones of the parts of the Strip 5 together, which in a previous operation by the heating device 15 to a degree were heated so that the folded strip areas become mechanically permanent and permanent tight connection are welded, which is stabilized by the folding device 16, which the Sealing surfaces during the period cools by being in contact with the folded-down flaps 64 of the Strip 6 stands.

When the strips 5 and 6 through the side seal in the manner described with each other are connected, the filling material is introduced into the container through the filling pipe 19, which is located under the strip 6, however, is arranged over the upper ends of the fittings 4, the box-like, under the Strips 6 formed spaces are filled with the filling material. The box-like rooms are created using the Sealing device 17 sealed to tight individual packaging, in which the strip 6 with those Areas of the strip 5 is tightly connected, which extend above the upper ends of the upright parts of the Form pieces 4 are located. The sealing device 17 is also connected to the carrier 13 and follows it in its back and forth movement. The seal thus takes place while the carrier 13 is synchronous moved with the fittings 4 downwards.

In the example shown, the sealing device 17 is of an ultrasonic type. However it is also possible to use a heater conventionally designed. The closed individual cons packs are finally separated from one another with the aid of the cutting device 18, which the closed packaging by means of a cut! separates by the sealing zones, which by means of the Abdichtvor direction 17 can be produced.

The filled and closed Verpackungsbehäl ter 30 are down in the fittings 4 of a Conveyor belt 28 held, which runs between end rollers 29 below the Formvorrich device. The packaging holder 30 are by means of the transport or driving wheel 27 with wings protruding from them to the processing

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processing device promoted, where any protruding sealing edges by means of a processing device 36 are removed, whereupon the finished packaging container finally by means of the device 34 to the automatic packing device 35 are brought, where the containers 30 in cardboard boxes or transport boxes be accommodated. The machine can be controlled from a control and operating panel 12, which controls the necessary actuators and controls to display the temperature in the various heating zones, etc.

The machine is driven according to FIG. 2 by means of a main motor 37 and a gear 38 coupled to it. The gear output gear 39 meshes with it an intermediate wheel 49, which transmits the drive torque of the motor 37 to a wheel 41 which is on the the same shaft as the V-shaped belt pulley 42, in particular the toothed belt pulley, sits. This shaft simultaneously represents the drive shaft for the molding device 2 and that of the molded pieces 4 carrying chain. By means of the pulley 42, a torque is provided via a V-belt or a Toothed belt 43 is transferred to the intermediate wheel 44, which is seated on a shaft 48. On the shaft 48 is arranged another pulley, of which a V-belt or toothed belt 45 a moment on a Belt pulley 46 transmits, which is seated on a shaft 47 driving the feed drum 23. The wheel 41 drives also a wheel 57 seated on a shaft 50. A transmission wheel 27 is also seated on the shaft 50. The wheel 57 drives a wheel 56, which in turn sits on a shaft 51, by means of which the finishing device 33 is driven. Furthermore, a large wheel 55 is seated on the shaft 51, which is connected to a smaller wheel 54 meshes, which via a sprocket with a locking device or clutch drives a chain 53 from an auxiliary motor 52 the small wheel 56 sits on the shaft 51, which is connected to the shaft 50 via a locking device.

When the main motor 37 drives the machine, will the torque is transmitted via the wheels 39, 40, 41 and 57 to the wheel 56, which is via the locking device passes on the torque to the shaft 51. The auxiliary motor 52 is then switched off and the chain 53 is immovable on the same shaft as wheel 54 due to the locking device in the chain wheel. When the main motor 37 has stopped, the auxiliary motor 52 can be started and the finishing device can be started 33 via the sprocket with locking device of the chain 53, the wheel 54, the wheel 55 and drive shaft 51. The locking device between the shaft 51 and the wheel 56 uncouples the Shaft 51 from wheel 56. The purpose of this arrangement is that the finishing device 33 also then should be drivable when the other parts of the machine are not working.

In Fig.3a is a view of a section in a Drive device for the molding tool 3 shown, while F i g. 3b in a perspective view the Shows drive arrangement from the other side. The drive assembly includes a housing 100 with a Opening 101 through which the shaft 104 protrudes, on which the molding tool 3 sits. The shaft 104 is rotatably mounted in the upper pipe section 103 of the pivoting arm 102, and a shaft bearing 126 (Fig.3b) carries a pulley 105, which is firmly connected to the shaft 104 and via a toothed belt 106 is coupled to another belt pulley 127, which in turn sits firmly on a shaft 111 which also carries a cam disk 108 and a wheel 110. The gear 110 meshes with a gear 109, that sits on the shaft 48, which is of a in connection with F i g. 4 mentioned wheel is driven, which of the chain of hinged fittings 4 is driven The lower end of the The pivot arm 102 is freely supported by the shaft 48 and therefore not from the rotational movement of this shaft

ίο affects the lower end of the swing arm 102 carries furthermore cam rollers 113 and 114, which are the cam disk 108 and the guide wings 115 can follow. The roles, or at least one of them, are always in place in contact with the surface of their cam and are counteracted by means of a spring or a Air cylinder 116 pressed, via a pivot link

117 is connected to the swivel arm 102. The air cylinder 116 is connected by means of a holding device 120 attached to the housing 100

To keep the toothed belt 106 taut when the swivel arm is oscillating back and forth moved, a belt tensioner 107 is provided, which is actuated by a spring, not shown, on the carrier 123 is to pivot the belt tensioner 107, at the ends of which tensioning rollers 122 are mounted. How out F i g. 3a can be seen the toothed belt 106 runs between the tensioning rollers 122, which on the Outside of the toothed belt 106 act.

The drive arrangement is further provided with wings 115 which can be used for regulating or controlling, which are articulated at support points 121 on the cam disk 108. The insides of the hill 115 run an eccentric disk 119, which is pivotable about the shaft 111, from which it by means of an air cylinder

118 can be uncoupled, the operating rod 129 on Attachment point 130 of the eccentric 119 engages. The air cylinder 118 is at 128 on Housing 100 hinged

By means of the drive arrangement according to FIG. 3a and 3b becomes that required for folding the strip 5 Movement of the molding tool 3 generated

The function of the drive assembly is as follows: The shaft 48, which is also the shaft for the Form pieces 4 can be, rotates at constant speed and thereby drives the wheel 109, which in turn a smaller wheel 110 drives the gear 110 rotates about shaft 111 supported in bearings 112 with a speed that due to the gear ratio between the wheels 109, HO six times is greater than the speed of the shaft 48. The pulley 127 rotates with the shaft 111, and the Toothed belt 106 transmits this revolving movement to pulley 105, which in turn drives shaft 104 and the molding tool 3 seated thereon drives As is also illustrated in FIG. 4 is described, wire the molding tool 3 not only a rotary movement but also an oscillating back and forth movement communicated, which is generated by means of the cam disk 108 seated on the shaft 111. As from Fig.3i It can be clearly seen that the cam disk 108 has two symmetrically opposite parts, which leads to As a result, the pivot arm 102 has two complete reciprocating movements with each revolution Cam 108 makes. The cam disk 1Oi acts on the swivel arm 102 via the cam roller 113, which is pressed against the curved surface of the cam disk 108 by means of the spring 116. Whom the cam 108 as it rotates the cams

Roller 113 lifts, the pivot arm 102 is in the same direction as the fittings 4 and synchronized with them emotional. When the radius of the cam disks 108 becomes smaller again after reaching its maximum, presses the spring 116 returns the pivot arm 102, thereby producing its return movement.

The belt tensioner 107 is used to prevent the movement of the pivot arm 102 a Affecting the angular velocity of the pulley 105 and consequently also on the Has angular velocity of the shaft 104, and that a change in the belt tension is avoided. By means of the belt tensioner 107, the Toothed belt 106 with almost always the same belt tension regardless of the position of the swivel arm 102 stopped and, on the other hand, prevents the movement of the pivot arm 102 from rotating of the pulley 105 and, as a result, a change in the angular velocity of the shaft 104 generated, which should be kept constant.

As mentioned in the description of FIG is, an adjustment of the feeding of the strip 5 with the aim of aligning a print on the Wrinkles are generated by the fact that the pivot arm 102 for a short period of time moves faster than the fittings 4, the shaft 104 the strip 5 a few millimeters forward past the upper end surface 70 of the upright wall part 66 of the molding 4 pulls. This additional feed movement of the shaft 104 is reached by means of the wing 115, which is on the cam plate 108 to the Articulation points 121 is articulated. The insides of the wings 115 are designed so that they are at an angle adjustable eccentric disk 119, the angular position of which is controlled by means of an air cylinder 118 is, the actuating rod 129 is articulated at the point 130 on the eccentric 119.

In order to determine whether an ornament or an imprint on the strip 5 is in the correct position with respect to the folds formed during molding, the strip 5 is colored with previously printed Marks or indices are provided which can be detected by a photocell device. in the In the present case, it is assumed that a noticeably insufficient supply of the strip 5 to z. B. 0.1 mm for each imprint is present, which means that the strip 5 after being advanced by a corresponding 10 imprints Length is 1 mm out of correct alignment. The marks or indices are on the strip 5 like this arranged that the distance between two successive marks is the exact length of an imprint or a multiple of this length. With the aforementioned misalignment of the strip 5, appears a mark or index after the advance of a number of imprint lengths immediately before the Photocell that senses the mark and sends an impulse to a valve via an electronic amplifier sends, which supplies compressed air to the air cylinder 118, which rotates the eccentric disk 119 via the actuating rod 129 so that the larger radius Parts of the eccentric disk 119 are rotated against the cam roller 114. When the cam plate 108 rotates, the wings 115 are through the eccentric 119 raised so that parts 131 of them move beyond the contours of the cam disk 108. the Parts 131 of the wings 115, which go beyond the cam disk 108, come due to the rotation of the Cam 108 in contact with cam roller 114, which is on the same shaft as cam roller 113 and sits right next to it. The consequence of this is a brief increase in the movement of the swivel arm 102, which thus moves faster than the shaped piece 4 in a position of the shaft 104 in which this over the upper end surfaces 70 of the molding 4 runs. Because of this speed difference between In contrast to rolling, the shaft 104 and the fittings 4 slide during normal operation,

ίο which the shaft 104, the strip 5 between the Shaft 104 and the upper end surface 70 of the fittings 4 can be carried along. The additional advance of the Strip 5 causes the marks on the strip 5 to be moved and on the next monitoring no marks are detected by the photocell, whereupon the valve to the air cylinder 118 turned off and the eccentric 119 is returned to its original position in which the Vane 115 does not exceed the outer contour of the cam disk 108 when passing the cam roller 114 be moved out. After a feeder has expired for a number of folds, appear new marks in front of the photocell and a new additional feed movement is initiated to achieve the Decoration of the strip 5 to adapt to the advance.

Fig.4a to 4f show the folding process to the U-profiles schematically, the strip 5 by means of the forming device 2 (Fig. 1) to a row of interconnected U-shaped sections is formed. The shaping is done so that the strip 5, which can already be provided with fold lines to facilitate folding, in Contact with the fittings 4 is brought. These

are articulated together to form an endless Chain connected. Each molding 4 consists of an L-shaped member with an upright wall portion 66 and a bottom part 67. The chain formed by the shaped pieces 4 is guided by means of drive wheels and

driven, of which the upper drive wheel sits on the shaft 48. The fittings 4 can be advantageous with Guide rollers may be provided, which can run in fixed guideways that run along the movement path the molding device are arranged.

By means of the drive shaft 49 (FIG. 2), the chain formed by the shaped pieces 4 is preferably in a constant speed driven in the direction of the arrow. The strip to be folded 5 is with the Molded pieces 4 brought into contact by means of the rotatable molding tool 3, which consists of two on the shaft 104 attached wings 68 consists. The shaft 104, in turn, is on the reciprocating pivot arm 102 stored, the drive of which has already been explained. The two wings 68 have a curved one

lateral rolling surface 125 and curved end surfaces 124, which also serve for rolling. The chain of Form pieces 4 moves at a uniform speed in the direction of the arrow, so that the swivel arm 102 of the shaft 104 of the molding tool 3 an approximately

synchronous movement with the fittings 4 communicates.

In Fig.4a it is shown how the shaft 104, which carries the wings 68, rolls over the upper end surface 70 of the upright parts 66 of the molding 4 and at the same time clockwise synchronously with the

Fitting 4 moved. When the shaft 104 rotates, the wings 68 of the molding tool 3 rotate with and the strip 5 is moved into the next following molding 4.

In Figure 4b, the molding process has turned into a something shown later, and in Fig. 4c has the Wing 68 of the molding tool 3 moves the strip 5 almost into the corner area 69 of the molding 4. The swing arm 102 begins a return movement at the same time as the contact between the shaft 104 and the upper end surface 70 of the fitting 4 is interrupted. During the The swivel arm 102 and the molding tool 3 are moved counter to the direction of movement of the molded pieces 4 are, the curved end surface 124 of the one wing 68 presses the strip 5 in. Sliding rolling motion against the bottom part 67 of the molding 4.

In Figure 4e, the edge of the wing 68 has the removed Reached the end of the bottom part 67, whereupon the strip 5 by means of the curved rolling surface 125 of the wing 68 comes into contact with the front face of the next following shaped piece 4 in the direction of movement.

In Fig.4f, the entire rolling surface of the Wing 68 rolled over the front side of the next molding 4 and the shaft 104 is just in contact come with the upper end surface 70 of this molding 4, over which the shaft 104 can roll, while the strip 5 is pressed against the end face 70 at the same time. In the position according to FIG. 4f becomes the Shaft 104 from the pivot arm 102 again communicated a movement that is synchronous with the movement of the fittings 4, and the position according to FIG. 4a is reached again.

A complete cycle is described above, which is repeated each time the strip 5 comes into contact with the shaped pieces 4. That Due to its rigidity, packaging material remains in the folded state without touching it would be interrupted between the shaped surfaces of the shaped pieces 4.

The strip 5 can expediently be printed with a printed text or ornament of an advertising or informative character. It is important that the fold is made in alignment with the print. It has thus been found that a preprinted strip 5, provided with crease lines, facilitates the folding with proper alignment of the imprints on the U-shaped sections because the folding takes place along crease lines which can be previously aligned with the imprints. If strips 5 without fold lines are used, it is advisable to design the strip feed so that it matches the print. Normally, the position of prints or ornaments with respect to the U-shaped sections is determined by means of photocells, not shown, which detect marks on the strip 5 and adjust the advance of the strip 5 as a function of the measurement result in such a way that the print is aligned with the folds of the shaped sections will. In the present case, the feed adjustment can take place in such a way that the pivot arm 102, in which the shaft 104 is mounted, is briefly pivoted forwards at a greater speed than the feed speed of the shaped pieces 4, without the contact between the shaft 104 and the upper ones End faces 70 of the fittings 4 is interrupted. Such a slight adjustment of 1 to 2 mm has no noticeable effect on the appearance and the volume of the finished container, but is sufficient to align the printing on the container.
In order to avoid sliding between the shaft 104 and the strip 5 on which the shaft 104 rolls as it passes the upper end surfaces 70, the shaft surface can be coated with a friction-enhancing coating, e.g. B. provided with a rubber coating

ίο be, or grooves or other interruptions on the Have rolling surface.

In FIG. 5a, a series of interconnected packaging containers 30 is shown in partial section shown as they are represented in the molded pieces 4 of the molding device 2. How recognizable is that connected row of packaging containers 30 from the U-shaped section folded strip 5 and the Strip 6 formed, which along its lateral edge zones with slots 63 for forming lobes 64 or tabs is provided which are folded against the ends of the U-shaped sections of the strip 5 and against it are sealed. The upper ends of the folded U-sections of the strip 5 are with the central areas of the strip 6 along the sealing zone 65 connected.

By means of a cut through the sealing zones 65, individual packaging containers 30 of the type shown in FIG. 5b shown type created. The finished container thus consists of two U-shaped elements, which consist of the Strips 5 and 6 are formed and are tightly connected to one another along surface areas over which they be brought into contact with each other.

A series of interconnected packaging containers 30 as shown in FIG. 5a can be produced when the cutting tools are removed or uncoupled to sever individual containers. However, this is easily possible if a series of interconnected containers 30 is desired will. The cutting tools can also be arranged in such a way that they each have one desired number of interconnected packaging containers 30, e.g. B. two and two or five and five, separate from each other.

In the embodiment shown, it was assumed that the packaging containers 30 are parallelepiped Have shape. However, the shape of the packaging containers 30 can even be changed.

In addition, the fittings 4 z. B. vice versa

Have T-shaped links rather than L-shaped links and be designed in such a way that the U-shaped folding section has a round, semicircular bottom instead of a: have level ground. The folded strip 5 is then given a cross section with U-shaped sections mi rounded bottoms, d. H. "LTUlT. The strip 6 is ii in this case also slightly modified. Instead of simple slits in the edge areas of the strip 1 material is punched out in a curved cut, so that the lobes thereby formed egg Get rounded free end that fits the bottom of the folds of the strip 5 for the rounded bottom. This obtained packaging container 30 have a rounded abge side that has a cup-shaped appearance creates.

In addition 8 sheets of drawings

Claims (8)

Patent claims: 1. Device for the production of cuboid packaging containers, which consist of two U-shaped be formed cross-joined together container parts, with a device around a relatively stiff strips of packaging material to a sequence of at the outer ends of their Legs to form connected U-profiles via a short connecting web, which in the essentially of a chain-like sequence of shaped pieces that can be moved along a closed path, Form the support surfaces for the U-profiles and a rotatable molding tool, which the strip in sections against the molded pieces formed from bottom parts and upright wall parts presses, characterized in that the rotatable molding tool wings (68) and has a shaft (104) carrying this, which is mounted in such a way that it has a backward direction transversely to its axis of rotation and executes forwards movement, thereby in sections of the path of the end surfaces (70) supporting the short connecting web of the upright Parts (66) follows and rolls on this, and that the wings (68) between the upright wall parts (66) are rotatable and shaped in such a way that they successively insert the strip (5) into the between the Press in the wall and floor parts (66 and 67) formed corner areas (69 and 69a). 2. Apparatus according to claim 1, characterized in that the wings (68) have curved end surfaces (124) and rolling surfaces (125) on the bottom parts (67) or the leading surfaces the upright wall part (6b) can be rolled over. 3. Apparatus according to claim 2, characterized in that the molding tool (3) has two having shaped wings (68) arranged diametrically opposite sides of a shaft (104). 4. Apparatus according to claim 3, characterized in that the shaft (104) in a back and forth movable pivot arm (102) is supported. 5. Apparatus according to claim 4, characterized in that the pivot arm (102) by a Cam disk (108) is driven. 6. Apparatus according to claim 5, characterized in that the cam disk (108) from the Has the circumference of the cam disk pivotable lips or wings (115), by means of which the Cam action can be changed so that the speed of the swing arm (102) temporarily can be increased, whereby the strip (5) is displaced relative to the end face (70), and that the position of the lips or wings (115) is controlled by control elements, the control marks feel on the strip (5) which are spaced apart by one correspond to the full length of one or more full lengths of ornaments. 7. Device according to one of the preceding claims, characterized in that the shaped pieces (4) are approximately L-shaped in cross-section. 8. Apparatus according to claim 7, characterized in that the L-shaped shaped pieces (4) are articulated to form an endless chain. The invention relates to an apparatus for producing cuboid packaging containers of the in the preamble of claim 1 mentioned genus. Such a device is already known (DT-AS 20 32 080). The packaging containers made of relatively stiff packaging material. It will be a preferably ongoing one and U-shaped bent or folded or shaped packaging material strip with another packaging material strip assembled to form a series of rectangular packaging containers; this other strip of packaging material is itself continuously U-shaped so that the axes of the U-profiles run parallel to one another, but transversely to the longitudinal direction of the strip. The shape of this a continuous sequence of strips having U-shaped segments occurs as a result, that the pregrooved strip by means of a reciprocable or rotatable punch in the Interstices of spaced apart parallel to each other and on a conveyor chain attached leg plates or wall parts protruding from the chain pressed in or pushed in is, whereby the strip is also placed over the outer end faces of these wall parts and on their Edges is folded over. However, this device can easily lead to jamming and it is necessary to that special synchronization measures must be taken to keep the stamp during the Pushing the strip into the compartments between the upright wall parts of the conveyor chain with the Movement of the same to move forward synchronously. In addition, rotatable stamp units are also known which are used for plastic deformation in the manner of a deep-drawing process plasticized plastic material is used. However, this will Cup-shaped container parts produced and a prior plasticization of the plastic material is required. The invention is based on the object of providing the device of the type mentioned at the beginning to enhance; without deleterious material deformation, such as stretching or stretching the material, the strip should continuously and with the least possible construction effort and low risk of failure in the desired shape can be brought. The invention consists in that the rotatable molding tool wings and a shaft supporting them which is mounted such that it has a reciprocating movement transversely to its axis of rotation executes, while sections of the path of the short connecting web supporting end surfaces of the upright Parts follows and rolls on this, and that the wings can be rotated between the upright wall parts and are shaped such that they sequentially insert the strip into the between the wall and floor parts Press in the corner areas formed. Although also in the invention, the shaft of the rotatable mold also has a certain movement When the chain-like fittings progress, this is relatively small Limited route. The outer surfaces of the wings take on the pulling of the strip into the Gaps between the fittings, in a special order with rolling Surfaces of the molded parts, whereby the inner corners of the U-profiles one after the other, but not at the same time.