DE1218332B - Machine for the production, filling and sealing of rectangular packs from a continuous strip of paper with a heat-sealable coating - Google Patents

Description

Machine for the production, filling and sealing of rectangular packs from a continuous tape of paper with a heat sealable coating. The invention relates to a machine for the production, filling and sealing of rectangular packs from a continuous band of paper with a heat-sealable coating or made of plastic.

It is known to consist of a filled tape formed into a tube by compressing and welding transversely to the longitudinal direction of the hose lying zones with paired clamping and welding jaws at intervals, which correspond to the later height of the packaging, add ready-filled bags to shape. The hose is formed around a round, oval or rectangular one Shaping mandrel to obtain flat bags or cuboid bags.

By pre-grooving the original web in the longitudinal device or in the In the longitudinal and transverse directions, it is easier to form a cuboid shape during the transverse weld. By continuously pressing in the pairs of cross-sealing jaws, which are mostly attached to conveyor chains very unfavorable material stresses result, since in the area of the rectangular to be formed soils the shortening of the filled hose web by pressing in half the floor width must be done while at the same time the web in the longitudinal direction Is subjected to tensile stresses.

In addition, cross welds were also known the formation of tetrahedral packings, which are primarily used for liquids Find.

In known machines of the aforementioned type, the cross welding jaws act or special organs the hose feed: According to another well-known suggestion becomes the in a smooth state over a pulley vertically downwards to one Hose fitting guided path with a counter-pressure jaw located inside the hose and an external pressure jaw in the region of the closed in the longitudinal direction Hose moved forward to the welding devices. The hose path must be included here the welding jaws are pulled down between the clamping device, which leads to unfavorable material stresses.

In addition one could feed devices, in which the hose path between external conveyor rollers and counter-pressure rollers located inside the hose is promoted downwards. An inevitability when advancing the hose web does not arise here.

With all these known machines and devices results arose even with the prior incorporation of guidelines, only imprecisely crafted square bags.

One therefore already has the transverse sealing devices with molded body halves combined, but here, too, no precise information can be found for paper and plastic Achieve cuboid shape, but there are rounded edges and more or less curved side walls.

Sterilization devices are still independent of the bag shape became known before the formation of tubing for vertical tubular bag filling machines. In these known machines, however, there are folding rails in a disadvantageous manner inside the hose so that the previous disinfection is carried out by the downstream Hose formation is impaired.

The present invention has the task of producing Precisely shaped rectangular pouch with a rectangular cross-section and pressed flat Bottom made of internally sterilized tubing for intermittent work to improve.

The invention is based on a machine for manufacturing filled and closed cuboid packs from a continuous band made of paper with a heat-sealable coating or made of plastic, which with a upstream of the forming and filling device for attaching longitudinal and transverse folding grooves on the belt, furthermore with a filling material feed and mandrel cooperating with a longitudinal seam sealing device for forming a closed Equipped with a hose with a rectangular cross-section is and these devices with a force-fit acting on the mandrel hose feed device below the devices for transversely folding and sealing the filled tube with the formation of flat top and bottom closures as well as with separating devices for Separating the finished packaging work together.

The invention consists in that between separately arranged longitudinal and transverse scoring devices a per se known guide track for longitudinally folding the Packing material tape to an unsealed flat tube and one of the latter deflecting roller are provided and that the transverse creasing device acting on the flat snake with a reciprocating in a known manner in the direction of the hose longitudinal axis Feed device is firmly connected and - as known - with molded body halves cooperating cross-locking device stationary below a hose guide head is arranged such that when closing the transverse sealing jaws this together with the molded body halves pushing together at the same time in the direction of the above lying guide head are movable.

In a preferred embodiment, to achieve an inevitable Feed the feed jaws at the level of the longitudinal sealing device with adhesive surfaces be equipped.

Between the longitudinal sealing and feed device can be in front a transverse sealing device consisting of electrical capacitors per se Switch on known product level control, with constant for each pack Filling volumes are guaranteed without expensive additional equipment.

For monitoring between a fixed and a movable stop actuated longitudinal tube feed device can be a known photocell are provided.

It turns out to be advantageous to have the cross sealing jaws in guide grooves fixedly hang sliding steering levers and a lever with a pull lever to connect the measuring cup halves.

To improve the formation of the tube, longitudinal grooving devices are known per se arranged in an ascending part of the still flat starting path, and this Devices are further devices for forming an open, lying flat Downstream of the hose in front of a pulley without touching the inner layer. Here it is possible between the pre-creasing device and the flat tube former turn on disinfection devices known per se. There is the advantage that the inside of the flat hose is not in contact with any folding rails or the like comes, but after diverting inside until the filling and sealing of the Bag remains sterile unaffected by machine parts.

You get a relatively simply built and not very expensive one Machine which, with regard to the bottom fold of the filled bags, intermittently works and is very precise while protecting the bag material and the contents Cuboid bag production permitted. Several can be used to increase performance Device units, so z. B. two to four bag manufacturing and Filling units also to be provided in the form of add-on units next to one another.

Since the feed device is firmly connected to the QueIrillunl, is in cooperation with the guide head and the adjoining molded body halves ensures a very precise bottom fold in the area of the transverse grooves. A safe one This ensures guidance when the hose sheet is pushed onto the mandrel, that the hose web above in the area of the transverse groove and below in the area of the longitudinal weld during the tube feed is detected by a full bag length.

The drawing shows, for example, execution forms for implementation of the method according to the invention, namely FIG. 1 an overall side view in Section, FIG. 2 a front view, partly in section, FIG. 3 is a side view with three processing units lying next to one another, Fig. 4 cross section 1-1 the F i g. 1, Fig. 5 Cross-section at level II of FIG. 1, Fig. 5a cross section III-III of Fig. 1, Fig. 6 to 8 longitudinal sections through the transverse sealing device in various positions, F i g. 9 shows a partial section through a transverse seal. contraption in an enlarged view in various operating positions shown therein, F i g. 10 Diagram of a package.

An output paper web 1 is heat-sealable on one or both sides coated. Instead of the kind of coated paper or the like, you can also Use plastic films that allow heat sealing. The roll of paper web For example, a mainly mobile housing2 is used, as well as can put on wheels. The F i g. 1 läßl an outlet slot 2 a in the upper part of the housing 2, under which one, for example, auç two rollers 3 and 3a existing longitudinal scoring device is provided. Instead of such creasing waltzes you can also see folding rails if necessary. The longitudinal grooves 94 are for example drawn in the fold step 4 of the web. Disinfection can be carried out over the slot 2a, z. B. od in the form of a moistening roller. The like., Spray nozzle. The like. Provide so the web 1 is disinfected on the inside and in this state immediately Connection to a hose former of any configuration can be supplied. This must be designed so that the web with a still unconnected overlap seam 13 is formed into a tube 14, which then over a pulley 14 downwards reaches the processing devices. The pulley 15 can be attached to a carrier 1 (attached to two pillars 17, 18. These are with a Stand 19 connected unc covered with a transverse plate 20 QF i g. 2).

In FIG. 1 are nine folding steps 4 to 12 ge shows where you can z. B. with baffles 21 and fingers 22, which are located outside, the track gradually forms into the tube 14. It is also possible to fold the hose Make a similar shaping in the area of the previously incorporated creasing lines can also be reached with any other folding device at sicl. in the Area of the still open hose, d. h, for example, with the folding steps 4 to 10, mar can provide for UV irradiation.

The hose web 14, which is still unconnected at the overlap seam is, is guided vertically downwards from the deflection roller 15 in order to or transverse embossing device with transverse to the longitudinal direction, if necessary oblique grooves to be provided, the shape of which is to be formed later Floors is adapted.

This embossing device 24 can according to FIG. 1 and 4 from one with Guide sleeves 25 and 26 are provided with cross members 27, in which one with grooves provided embossing plate 28 is attached. This works with the counter-stamping plate 29 together, which are completed with a resiliently pressed support plate 30 to the outside is. The cover plate 30 with the counter pressure plate 29 are force-controlled, namely For this purpose, a pressure cylinder 31 can be provided, the piston 32 of which the Embossing plate 29 on the counter plate 28 for embossing crease lines in the fiachen Hose 12 presses on.

The cross member 27 is guided on the pillars 17 and 18. These pillars 17 and 18 can be mounted on the machine body 33, in which further processing devices are included. Next to it is the housing 2 with the paper rolls.

A mandrel connects to the transverse embossing device 24 at the bottom 34, which can be attached to the column 17 with a support 35. Up to the mandrel is conically tapered and has down to the cross section of the bags to be molded.

Inside the mandrel there is a filling channel 36 for the Filling material, and this channel 36 can pass through a filler neck 37 with a Storage container for the filling material are connected.

The filling material reaches the bag tube through the outlet 38.

Above the outlet is located at the lower end of the mandrel 34, where the same has a rectangular shape adapted to the bag to be formed, the longitudinal sealing device 39. This consists of one attached to the columns 17, 18 Carrier 39 a and a heated printing plate 40, which with a printing device, so z. B. with the piston 41 of a hydraulic cylinder 42, to the longitudinal sealing seam the hose is pressed and this is sealed. Serves as a back pressure sensor the mandrel 34 (see. Also Fig. 5).

There is another one approximately at the level of the longitudinal sealing device 39 Feed device 43 for the bag tube. This consists of two feed jaws 44, 44 a and rollers 45, which are located inside the hose, to the pressure of the feed jaws to catch. These rollers 45 are attached to the mandrel 34 via its outlet 38, which has a correspondingly reduced outer diameter at the level of the feed device owns.

The feed jaws 44, 44a, which are provided with adhesive surfaces on the inside, are located on a cross member 46, which like the cross member 27 of the transverse embossing device is performed on pillars 17 and 18.

This cross member 46 is with the cross member 27 via rods 47, 48 in connection.

The feed jaws 44, 44 a are on articulated levers 49, each are rotatably attached in the middle at 49 a on the carrier 46, with the piston 50 and the housing 51 of a printing cylinder articulated in such a way that from this cylinder the jaws 44, 44 a pressed against the hose and from this can be moved away d. H. this allows the feed jaws to be opened and closed (Fig. 5a).

The feed of the tube in the vertical direction is controlled by the Pressure cylinder 52 completed, the piston rod 53 of which via an arm 54 with the support plate30) the transverse embossing device is in connection. This advance takes place in the way that after closing the feed jaws 44, 44 a their cross member 46 from the cross member 27 of the feed device connected to the piston rod 53 pushed down over the connecting rods 47 and 48 in the desired length will. In Figs. 1 and 2, the lower position and in F i g. 3 the upper position shown.

The vertical tube feed takes place between a fixed one and movable stop, and this is monitored with a photocell 55, the seated on a bracket 55a attached to the column 18.

The height of the filling material in the hose is adjusted with a level control 56. This can be done with the help of an electrical capacitor. Of the Condenser with an air-filled hose between the two condenser plates has a different capacitance than a capacitor with an interposed one Column of liquid.

The level control 56 is followed by the bottom shown in FIGS. 1, 6, 7, 8 and 9 shown transverse sealing device 57. This possesses in hers upper part a stationary guide head 58, which at the lower end of the bag cross-section has corresponding rectangular recess, which is funnel-shaped upwards expanded. On the two opposite support arms 60 of the guide head 58 are each at 61 and 62 angle levers 63, 64 articulated, which are at the upper ends are always connected parallel to one another via a rail 65 (FIGS. 6 and 9). At the angled lower ends of the angle levers 63, 64 are rollers 66, which are guided in longitudinal slots 67 of transverse sealing jaws 68, 69 (FIG. 9). To the The elongated lower end 70 of the angle levers 64 are drawbars 72 with pins 71 brought in connection, the lower end to support 73 of the transverse sealing device are hinged. These carriers 73 are horizontal with pistons 74 of pressure cylinders 75 moved back and forth. During this back and forth movement, measuring cup halves are formed 76, 77 moved along. These have at the lower end pressure jaws 78, 79, which in the Forward and backward movement can be opened and closed.

On the transverse sealing jaws 68, 69, at their front ends in each case 80 heating devices can be embedded, are in connection with pressure pistons 81, 82, which are controlled with pressure cylinders 83, 84. With these pressure cylinders takes place the opening and closing of the heat seal jaws 68,69.

Instead of the heating elements inserted into the sealing jaws 68, 69 80, which transfer the necessary heat and in the closed hose l4a The transverse seam 91 of the pouch 90 can also be heat-sealed for the sealing one Use pulse welding.

The devices described in Figures 1-9 operate as follows: The closed tube 90 is first connected to the feed device as As described above, pulled forward to the lower part of the measuring cup halves 76, 77. Well be at the cylinder 83, 84 is applied to the stationary hose, the transverse sealing jaws 68, 69 being horizontal via pistons 81, 82, but around the axes 61, 62 are pivoted to each other and moved upwards. Here the pull Pull rails 72 at the same time the frame-like carrier 73 with the measuring cup halves 76, 77 to double the height upwards, where they are in a pawl, not shown snap into place.

In this combined movement of the transverse sealing device 57 is closed with the longitudinal sealing device 39 in the longitudinal direction Tube 90 with the transverse sealing jaws 68, 69 in the transverse direction with a transverse seam 91 provided.

By simultaneously pushing up the transverse sealing jaws 68, 69 when The transverse seam 91 between the transverse sealing jaw ends is cross-welded upwards pressed, with the upper rectangular bottom at the lower end of the stationary guide head 58 is formed with the simultaneous formation of laterally protruding corner tabs. Simultaneously pull the pull rails 72 the closed measuring cup halves 76, 77 upwards, with at the upper ends of the transverse sealing jaws 68, 69 bounded by the rectangular Bottom of the bag located within the measuring cup halves is formed at which protrude laterally the corner tabs.

The starting position of the transverse sealing device 57 and some intermediate positions are dashed in FIG. 9 shown. The end position is shown in FIG. 7 to see.

Following the formation of the transverse sealing seam 91, the Heat sealing jaws 68, 69 and the measuring cup halves 76, 77 in the vertical direction in connection on the guide head 58 close together and, as described above, the cuboid shape of the bag is formed (Fig. 7), the cylinders 83, 84 for Opening of the heat sealing jaws 68, 69 actuated in the opening direction. The pistons 81, 82 now pull the heat-sealing jaws 68, 69 initially over the longitudinal slots 67 apart, as in Fig. 8 shown. The height lock is in this position of the carrier 73 unlatched again, and the downward movement of the transverse sealing jaws68, 69 and the carrier 73 with the measuring cup halves 76, 77 takes place up to the in the F i g. 1 and 6 shown starting position. With stops 85 (Fig. 9) can unwanted pulling out of the transverse sealing jaws can be prevented. Now done the opening of the measuring cups 76, 77 with the pressure piston 75, and the filling of the filling material, z. B. a liquid, can through the nozzle 37 and the channel 36 in the hose 90 can be carried out. The product height is adjusted with the level control described above 56 adjusted.

After the filling, the filled hose is fed again 14 a up to the level of the measuring cup halves 76, 77, whereupon these close (Fig. 7 and 8) and with the knives 86 seated on the lower pressure jaws 78, 79 the previously manufactured bag 90 is separated. It is here first around half a bag that is created when the machine is started up and now must be removed.

After this preliminary work, the machine can work independently begin, in the manner described above, each after welding the transverse seam 91 extends over the same a fully filled pouch open at the top and below a bag 95 closed at both ends in a rectangular manner within the Measuring cup halves 76, 77 are located. After opening the measuring cup halves, then the filled bag is fed to a further processing stage after being separated. In this processing stage, which is not the subject of the present patent application is, the bag 90 is fully folded.

Instead of the hydraulic and pneumatic shown in the drawing actuated cylinder pistons can also be mechanically or electrically actuated drive devices use.

The F i g. 10 shows a completely filled bag 90.

The bottom 92u is with laterally protruding corner tabs 93 each pressed flat, and the transverse weld seams 91 protrude upwards and downwards.

In further processing stages, not shown, the transverse welds must 91 laid flat on the floor 92, the corner tabs 93 shortened if necessary and in the Inside, welded to the floor, to be fastened there. The completely finished bags are then sent in boxes or the like.

Claims (7)

Claims: 1. Machine for the production of filled and sealed cuboid packs made from a continuous strip of paper with heat-sealable Coating or made of plastic, with one of the form and filling device upstream Device for making longitudinal and transverse folding grooves on the tape, further comprising one having a filling material feed and one with a longitudinal seam sealing device cooperating mandrel for forming a closed tube with a rectangular Cross-section and with a force-fit hose feed device acting on the mandrel below the devices for transversely folding and sealing the filled tube forming flat top and bottom closures as well as separating devices for separation of the finished packaging are arranged, d a by c h g e - indicates that between separately arranged longitudinal and transverse creasing devices (3, 3a and 24) one per se known guide track (21, 22) for longitudinally folding the packing material strip into an unsealed one Flat hose and a roller (15) deflecting the latter are provided and that the transverse grooving device (24) acting on the flat hose with an in known way in the direction of the hose longitudinal axis reciprocating feed device (43) is firmly connected and - as is known - interacting with molded body halves (76, 77) Querschlievorrich device (57) stationary below a hose guide head (58) is arranged such that when closing the transverse sealing jaws (68, 69) these together with the molded body halves (76, 77) sliding together at the same time in realm device of the guide head located above (58 are movable. 2. Apparatus according to claim 1, gekennzeicfr net by the amount of Longitudinal sealing device (39) arranged with adhesive surfaces in front of pusher jaws (44, 44 a), which is known with in Way on the internal mandrel (34) mounted counter-pressure rollers (45) cooperate. 3. Apparatus according to claim 1 and 2, characterized in that for monitoring the actuated between a fixed and a movable stop Hose longitudinal feed device (43) a photocell (55, 55a) is switched on. 4. Apparatus according to claim 1, characterized in that the transverse sealing jaws (68, 69) are fixedly suspended by steering levers (63, 64) sliding in guide grooves (67) and a lever (70) over a pull lever (72) with the measuring cup halves (76, 77) connected is. 5. Apparatus according to claim 1 to 4, characterized in that between the longitudinal sealing device (39) and the feed device (43) in front of the transverse sealing device (57) a product level control consisting of electrical capacitors (56) is switched on. 6. Apparatus according to claim 1, characterized in that per se known longitudinal scoring devices (3, 3 a) in an ascending part of the still flat Output track (1) are arranged, and these devices further devices to form an open, flat-lying tube without touching the inner layer are connected downstream in front of a pulley (15). 7. Apparatus according to claim 6, characterized in that between the pre-scoring device (3, 3a) and the flat hose former known disinfection devices are switched on. Considered publications: German Patent Specifications No. 1,113,174, 1,119,750; Swiss Patent No. 302767; British patent specification No. 827,792; U.S. Patents Nos. 2 113 658, 3 026 658, 3 006 121, 3 048 951, 3,050,916.