DE2850882A1 - METHOD AND EQUIPMENT FOR THE CONTINUOUS MANUFACTURING OF TUBE-SHAPED PACKAGING BODIES BASED ON FLAT SHEETS OF CARDBOARD - Google Patents

Description

"METHOD AND EQUIPMENT FOR THE CONTINUOUS MANUFACTURING OF TUBE-SHAPED PACKAGING BODIES BASED ON FLAT-LAYING CARDBOARD SHEETS"

INDUSTRIA CREMONESE D ¹ ARTI GRAFICHE snc Cremona (Italia)

The invention relates to a method as well as to starting with the corresponding device for the continuous production of tubular packaging bodies of flat cardboard sheets in order to produce cylindrical packaging containers with such tubular bodies. It is known that currently the tubular body for so-called barrel-like or similar cylindrical Containers for bulk goods, powdery or liquid substances, such as detergents and other consumer goods can be produced by first continuously winding several cardboard strips in a helical manner in such a way that a continuous tube is created, which is then cut into pieces and these pieces are flanged over and provided with a base and lid.

Such a method has numerous serious disadvantages. Above all, the procedure is proportionate time consuming, requires expensive and complicated ones

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Machines in a box, with those from the box manufacturer already formed container stored and the packager to be filled in these containers Products have to be sent, from which it can be seen that this causes drastic costs for the storage of bulky, empty containers at the cardboard factory and for the maintenance of another Storage at the processor as well as for the transport of the empty, carefully packed containers to avoid transport damage from the cardboard factory to the processor. Furthermore, one is wound through with one The container made of cardboard tapes forced the printed outer sleeve in a further operation to attach with the labels, what with additional storage costs, transport costs and effort for the attachment the shell is connected, apart from the fact that this shell does not always sit properly, there it is difficult to wrap a sheet around a large cylindrical body like such a container and stick on.

It is also known to produce tube bodies made of cardboard, the cardboard already printed and attached to the The surface is decorated to form bottle packaging, boxes or the like, with leaves it is assumed that the model is modeled on the inner core

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which simulates the inner shape of the tube to be produced, and the sheet on the by clamping jaws Shape is held, these also connect the overlapped edges of the sheet and hold until it sets, however, this system is time-consuming and not very secure because the sheet has to be placed between the jaws like this remain tense for a long time until the glue has set and then ejected by push rods that deform the pipe that has just been glued or open it again.

The invention overcomes all of the above-mentioned disadvantages and provides a method and a device which, with simple implementation, enable the continuous production of tubular bodies for packaging, starting from flat, already printed and decorated cardboard sheets. In this way, all storage and transport problems of the preformed tubular bodies are superfluous, because the consumer himself produces such tubular bodies starting from flat pre-printed sheets when he wants to pack his products in the tubular containers, the production speed of the packaging series being appropriate for which one the machine according to the invention can be set up without any particular problems.

The method according to the invention comprises the operations:

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Lifting one sheet at a time from the storage stack; Create the preprinted sheets around the tube core; Spreading the glue or activating it as soon as the sheet is Plant comes; Further switching of the pipe body in the position surrounding the pipe core, temporally and geometrically Measure exactly so that a perfect gluing on the overlapping longitudinal edges is ensured is. The device according to the invention consists essentially in the structure and in the composition of means for stacking flat, printed and decorated sheets; Means for withdrawal from the warehouse and a first advance; Means for guiding the sheets when enveloping a tubular core, the sheet longitudinal edges lie on top of each other; Means for applying or activating the glue along one side of the sheet, short before the outer edge comes to rest on it; Means for advancing the tubular body that is being formed along the tubular core and finally at the device outlet come to the discharge; Means that increase the production speed and precision by reducing the friction between the tubular body and the core; Means the in in the central position, keep the pipe body pressed against the core until the glue adheres completely; middle for controlling the movement and setting the various feed rates and the feeds provided in the device.

Other features / objects and advantages of the invention go below from the following detailed description of a preferred embodiment of the device according to the invention, from which the structure of the corresponding process, which is only exemplary and in no way restrictive is stated, referring to the attached illustrations of the apparent and descriptive Reference is made to the drawing. In this show: Fig. 1 is a highly schematic illustration of an example of the device for carrying out the method according to the invention, in particular the various work stages and operations representing the closed, starting from a flat sheet, tubular body lead; Fig.2 is a rear view of the machine, where at the front the storage area for the flat sheets and the corresponding gripping means for removing the sheet can be seen from the stack; is advanced towards the first bracket bolt for anchoring the pipe core the glue application or the above lying over the pipe core. To see the activation device and the corresponding control panel;

Fig.3 is a more detailed rear view of the device, from which the beginning of the pipe core can be seen in front of the storage area of the flat sheets

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on which the sheets are wound and in which there is a driving and pressure belt with sliding jaws, which is driven at the rear.

Fig. 4 shows the same area in perspective from the right of Fig.3, with the adjustable Tension rod for holding the pipe core can be seen, the overhang on the first bracket bolt of the underframe is anchored.

Fig.5 is a right side perspective view of the Area that immediately precedes the closing of the leaf to form a tubular body: this is particularly clear the glue application device, the photocell system and the guides or convergence legs; Figure 6 is a front view of the area where the wrapping process begins and along the sides of the tube core two asymmetrical guide entry plates r. molded are.

Fig.7 is a perspective view of the left side of the device, seen from the point at which the wrapping begins, and shows the left side cage to Guiding the tubular body on the core.

Figure 8 is a right perspective view of that of Figure 7 axially symmetrical area in which a longitudinal guide cage can be seen similar to the opposite. Figure 9 is a front perspective view of the device end portion

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within which the gears and control and drive rings of the feed movement of the tubular body on the Run off tube core, which is driven by a motor / the bottom in front of the on the surface with silicone treated tube core lies.

Referring to the figures in the accompanying drawing and looking first at Figure 1, will the following describes the method according to which the tubular body aif the example specified according to the invention Device is molded.

The flat, printed and decorated sheets F are individually to the stack P by the pneumatic Grippers are removed and, running over the transport rollers D, are placed on the tube forming core A, its diameter corresponds to the diameter of the tubular body M to be produced, the side guides G, the guide entry plates G-j and the upper, converging guides V force the sheet to wrap up to be carried out to impact point U: approximately before impact point U is the glue application controlled by a photocell or activation device attached. As soon as the sheet comes into contact with the tube core, it is removed from Taken at the bottom by a caterpillar T with rubber pads.

After gluing, the pipe body is moved forward

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held in shape until it was pushed out of two side cages G, G- will. For taking along, even after gluing until the tubular body is detached from the tubular one Core, takes care of the caterpillar chain T, whereby the chains B. and B, which are opposite each other at the top, also participate and against the edge during gluing until the glue has set and therefore the tubular body is pushed out on the device.

Some components of the feeder 1 and the corresponding means for removing the sheet from the stack can be designed in any form already known in the cardboard industry and therefore do not belong to the features of the present invention. It should already be pointed out at this point that all caterpillar chains with pieces of rubber that are used for driving are driven at the same speed by a common motor, which drives all drive elements through a chain drive and gear train with gear wheels of different shapes and dimensions. The motor is located opposite the ejection point of the tubular body from the forming core in a lower, forward-facing area, but this drive motor, which serves to drive all pushing operations, can also be arranged set back below the removal store.
Similarly, the device for attaching the adhesive strip or for activating a

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previously applied adhesive, immediately be arranged after the removal store and the glue can be spread on the surface of the spread sheet but in a different way than previously described: what will be described below is based on a long work of optimizing the process and the device that made it possible to achieve the best and most reliable Determine locations for the various components. The other details of the drive means and the frame are not given, but only described in general, because for the same there is the possibility of executing them in different ways and for a machine specialist such trainings are obvious. The inventive The device can be specifically adapted to the specific diameter of the pipe body to be produced: at least it is the adaptation and the easy adjustment or the replacement of those guiding and shaping components that are suitable for the new one Adjusting the format are easy to see. The device C, for applying or activating the adhesive, can operated intermittently, e.g. by photocells that can be switched on and off at the beginning and end of the cycle ens each sheet F, or it can be provided their continuous operation, in view of the short Intermediate time given from one pass to the other; in this case is a suitable drain and Possibly the recovery process of the adhesive

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see that it is output from one to the other sheet pass.

From the above general description of the method and the device it is clear how the device is set up and operated and only a few structural details are explained in more detail below will have to fulfill an essential task and whose features are particularly to be emphasized.

Referring to Figure 2, in which the area of the magazine can be seen within which the stack of sheets is to be placed, shown schematically by the uprights 111 and the adjustable chutes 112 , from the latter falls a spread sheet F already printed and decorated , on the transport belts 113, which guide the sheet through between the deflection rollers 114 of said belts and the pressure rollers 115 above, then the sheet is advanced until its leading edge is gripped by the following main conveyor belt T, the sheet still under the inevitable entrainment of the belt 113 stands, which is why it is always exposed to a forced entrainment force. Of course, all structures of the loading magazine of the stack are adjustable in order to be adaptable to the sheet dimensions that are to be processed.

The tip 212 or the removal element of the flat collar / is moved by a hinged square, the

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with two hinged to the cross members 212c and 212b Rods are provided, the latter being cut; the entire removal element 212 is by turning the handwheel 213a can be centered on the middle of the sheet; the aforementioned handwheel is integral with the cut cross member 212b connected to the one socket with endless screw 213, is firmly connected to the removal element, is coupled. The conveyor belt 113, the deflection rollers 114 and the opposite pressure roller 115, which are now both in one much more advanced position, slide that spread sheet until its leading edge is gripped by the main crawler belt T, the is provided below the tubular core along the entire length of which: the sheet is already beginning from here onwards the wrapping process as it is up to both of them Guides G comes to rest, whereby the two side edges are raised. Although, as indicated, the holding frame of the pipe core is not the subject of this description, Fig.2 preferably shows one Training characterized by a first bracket bolt N, a second bracket bolt O and an overhanging one Bracket R of the end part of the pipe core. The glue dispensing nozzle C, the transfer pipe, is in the middle position W, connected to the electronic control housing Z, can be seen on the right.

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Although the reference numbers of other components are given in Fig. 2 to identify the same, are these are described in more detail later and the numbering serves to get an overview of the system here.

Fig. 3 shows the lower caterpillar chain T, which is driven by the drive motor at the front. The chains 202 and 203 are the reverse inversions for transmitting the drive to the inner caterpillar chain B.

of Fig.1. The tube core A is held, partly overhanging, by the bracket bolt N through the shaped washer X. _{The two guide entry plates G and G 1} are asymmetrical to the longitudinal axis of the machine and in the position of the start of the sheet wrapping, and they prevent the sheet from curling up and converging towards the gluing and overlapping point of the edges. Instead of a removal element 212, as shown in Figure 2, two likewise gripper-like removal elements can be used, which are then, as shown in Figure 3, arranged on the sides of the pipe core. Figure 4 shows some interesting details of the area in which the envelope begins, the guide entry plates G being particularly clearly visible and the upper side of the driving belt T. Small rollers 116 can also be provided, which are held in place by small overhanging arms 116a will.

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The legs V are very close to the tubular core A because they a tight bond tolerance at the sheet edges when bonding the same should secure. The shaped washer 218, which is screwed to the pipe core, allows the coupling of a Threaded pull rod 219 through a double threaded bushing 219b, to which a further tie rod half 219 is screwed, which with the bolt bracket N over a shoulder 118a is coupled to adjust the overhang of the Tube core is adjustable.

As in the coupling block 220 for coupling the molded disk 218 with the pull rod 219, a bracket should be emphasized

221 for the lateral stiffening of the guides G welded in is, wherein said guides with the legs V form one piece. In particular, Fig.5 shows the convergence legs V, V, V, which is also in the position of the extension 216d, which engages in the arm 216a, are stiffened. The two legs V and V are spaced apart from one another by the shaped bracket bolt 217a held. It is always the caterpillar chain T that takes care of the entrainment and it could also roll loose

222 are provided, which would only serve the purpose of the sheet F, which begins to curl up center and hold it in place.

Always from the chain T with rubber-coated caterpillars Taken sheet F, begins now, after partial

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Rolling in through the guides G and the legs V, its gluing process.

When the leading edge of the sheet F comes under the photocell 128, it has already been rolled sideways around the tube core, the pages are held in place by pressure by the guides and legs. Before the side edges touch, the nozzle C, which is promptly dispensed by the photocell 128, applies the glue only to the lower right edge Y of the sheet F, which is at the. final shape of the tubular body is inside; : - This glued edge gradually overlaps the lower edge, left side of the sheet, the guides V., V-, V- and V., which are attached to the frame of the bolt bracket by stiff lugs 231, guide said edge and in the Bring the gluing process to coincide. Both the photocell 128 and the nozzle C, for activating or dispensing the adhesive, are held by a hinge system consisting of the rods C, and C ^ and of the clamp C for the nozzle and the rods 128 and 128 with the clamp 128 for the end of the photocell. The nozzle C is energized through the cable 125a and the connector 125, 125b; the photocell is assigned the cable 125c and the connector 125d. In the course of the advance along the pipe core,

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the tubular body when shaping always from below taken by the caterpillar T and just before the Take over the glue application station, as can be seen in Fig the legs V and V., V_ and V successively alone the The task of centering and its coupling precision force the sheet to assume the desired position and to enter the side cages those on hand the other figures in the following in the detailed Description are set out. However, it should be emphasized at this point that the partial coating 308 of the tube core with silicone is treated: of course, this coating is missing on the Connection points with the shaped disk H and the shaped disk 9 which supports the pipe core. The advantage of such a coating is to reduce the sliding friction between Blade and tube body on the one hand and the outer surface of the tube core otherwise noticeably reduce, whereby a higher precision in the end product and an optimal production speed is achieved. · In Fig 6 are the lower ends of the right side cage G which is used for shaping and overhangs from the arm 310, which on the frame by a clearance fit to the desired Infeed of the cage attached to the forming core is supported is indicated. Apart from the structural parts of the frame, which are shown in the essential lines in Fig. 7, are now the side cages of the

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Infeed described, initially consisting of the two lower bars G_ and then, during the overlapping process of the edges, expanding circumferentially up to seven-eight rods G .. The centering and adjustment system is through the symmetrical cages G supplemented and also formed by the upper legs 111 and 112, which cover the the pipe body edges complete and this in the appropriate position up to the entry between the Hold the opposing caterpillar chains tightly, these chains with B. or B as the outer or inner chain are designated. The setting of the side cage G is done by fine adjustment of the arms 310, 313 and on the frame by screws 315 the in elongated holes 316 the Fix the set position: as already mentioned, this design is characterized by its simplicity and precision from as well as through the reliability of the components. The right cage G_, symmetrical to the previous one, goes from Fig. 8.

The solution of guiding by cages is to be regarded as the best possible, but the delivery can also be done by rollers and lateral caterpillar chains.

The caterpillar chain B. is provided with a chain tensioner 317 and is driven by the chain .318, which acts on the toothed ring 319 lying coaxially to the toothed ring 320.

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The caterpillar chain T acts on the sprocket from below 321, which is firmly seated on the shaft 322, which is mounted on angular contact bearings 323 and which in turn comes with it the machine frame form a unit. The cage G_ also consists of seven rods that are rigid in the Arranged in a semicircle and anchored to the frame by feed arms 324, 325 by means of screws 326 which are shown in FIG Long holes 327 act. The longitudinal arm R and the two bracket bolts O and P are used to hold the movable one and solid parts and should ensure the precision of the product through their inherent rigidity.

In order to reduce the sliding friction and thus to increase the precision of the finished tubular body, the motor for driving all movements, as already mentioned, was arranged at the bottom in front of the machine, and all drives for the chains with sliding blocks take place in the exit area of the tubular body .; This does not apply to the inner belt B _1, the drive transmission of which is located in the magazine area.

The solution described above can be seen in Fig. 9. Specifically, is motor 328, gears 329 and 330 that mesh and control the speed of shaft 322 can be seen, whereby the chain 318 is driven via the gears 331 and 332, which is the outer upper Belt with sliding blocks B. drives: on that of the motor 328 by the chain 333 and the ring gear 334 driven shaft 322, the ring gear 321 is attached, 'the for Movement of the lower outer belt T is used. Except the

two lateral bearings 323, the shaft for reinforcement has radial bearings 335 and 336, which are held by the machine frame are.

The device as described above is also available with other variants, additions, additions and simplifications of the Components can be carried out, but always to carry out the operations according to the method according to the invention / wherein neither the sense nor the purpose of the invention and its scope of protection are exceeded.

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Claims (27)

2350882 PATENT CLAIMS .1 process for the continuous production of tubular Packaging bodies based on flat cardboard sheets, the operations consisting in that from a stack or magazine one of the flat sheets that have already been printed and decorated, is removed, these sheets are fed to a tube core around which the sheets inevitably wrap themselves the leaves under a glue application or activation device run through for gluing a longitudinal edge of the sheet, gluing the overlapping longitudinal edges and for the longitudinal advance of the tubular body being formed of the tube core to the exit end, with the sheet always in the position rolled up on the tube Pressure is maintained so that the applied on one longitudinal edge Glue finally sets. 2. The method according to claim 1, characterized in that that the applied or activated glue is hot-melt is. 3. The method according to claim 1, characterized in that that the application or activation device is running through of the sheets is intermittently in operation, wherein means are provided which the continuous sheet beginning and raise the end of each sheet. SftoPHCIED 4. The method according to claim 1, characterized in that the glue application or activation device is continuous is in operation and a drainage or a possible recovery of the glue is planned, which takes place in the time interval is output from one sheet passage to the other. 5. The method according to claim 1, characterized in that that the sheet is introduced onto the tube core by means that gradually curl the sheet edges and thus then place the sheet around the tube core and bring the two long edges of the sheet to bear in such a way that the with glue applied edge under the opposite one Edge comes to rest. 6. The method according to claim 1, characterized in that that the pipe body formed on the pipe core is advanced by continuous means of transport, like caterpillars with rubber contact pieces that continue the tubular body on the tube forming core and press it on keep. 7. The method according to claim 1, characterized in that means for reducing the blade friction during of sliding are provided on the surface of the pipe forming core. 8. Apparatus for the continuous production of tubular Bodies according to the method according to claim 1, -20- 909823/0840 INSPECTED which serve packaging purposes, marked by this, that it is essentially formed from means for storing a stack of flat, already printed ones and decorated sheets, means to remove and continue one sheet at a time from the storage area, Means for stopping the sheets around a tubular core with superimposed longitudinal edges to put, means to apply or activate glue along a longitudinal edge of the sheet, means around the tubular To advance the body with the longitudinal edges lying on top of one another, means around the one mentioned on the above Core forming tubular body to advance to the output end, always in the mentioned Tubular core enveloping layer is held pressed and drive means for the various provided feed and Feeding means. 9. Apparatus according to claim 8, characterized in that the drive means consist of a common motor, which is located in the outlet area of the tubular body from the tubular Core is arranged and drives all feed and supply means via chains in synchronism, which in Gear rims engage and drive the various gears made up of gears and pinions. 10. Apparatus according to claim 8, characterized in that the common drive motor, the chains and the feed and Drives feed means in front position: i.e. 909823/0640 -21- "", ...-; ...- ORiGi ^ ALiNSPECTED the tensile force acts for all means, with the exception of the lower caterpillar chain, in the exit area of the tubular body. 11. Apparatus according to claim 8, characterized in that the means are pressed to the tubular body and in the To keep the desired position, after the glue feeder consist of stiff side cages, which are supported by feed arms which are adjustable by the coupling on the frame with bolts acting in elongated holes. 12. Apparatus according to claim 8, characterized in that the means that the sheet to stop around the Tubular core to lay out consists of a first pair of guide entry plates, which after lifting the edges of the sheet put the same partially around the tubular core, from a second pair of parallel Legs that serve to keep the edges in the desired position and finally made of a third pair upper converging guides to complete the envelope and to close the tubular body, wherein the long edges overlap at the point where they meet. 13. Apparatus according to claim 8, characterized in that the tubular core on which the tubular body is to the
is formed, about up to / half the length has a continuous groove to enable the pressure between the outer bead and the inner bead. 14. Apparatus according to claim 8, characterized in that 909823/0640 the means for advancing the stored sheets ORiGiNAL INSPECTED There are a number of conveyor belts that place the sheets under the device that initiates the rolling process bring where the leading edge of the sheet is captured by a lower central caterpillar track which advances the sheet along the entire tube forming core to the end of the exit. 15. Apparatus according to claim 14, characterized in that the inner central caterpillar chain during its entrainment movement cooperates with another outer caterpillar chain and also the tubular body, with the assistance of Cages, pressed against the tubular core. 16. Apparatus according to claim 15, characterized in that the top with pieces of rubber, apply glue to the caterpillars from the feed area to the exit area presses on the edges when gluing the pipe body and that the same under pressure, through an upper longitudinal groove of the pipe core, a caterpillar chain with pieces of rubber is opposite, which lies within the pipe core. 17.Gerät according to claim 15, characterized in that the means are pressed around the pipe body and to hold it in the desired position, except for a row of cages and a row of feed rods, which comprise driving caterpillars which are arranged after the glue application device along the circumference of the pipe core.
18. Apparatus according to claim 8, characterized in that 90982 37% /, 0 the means of guiding the leaves so that these uki lay the tubular core, consist of a first pair of lateral guide lead-in plates that follow Lifting the edge of the sheet to partially wrap the sheet around the tubular core, off a second pair of upper parallel guides to keep the edges in the desired position, especially the edge on which the glue is applied or activated v / earth, and finally from a third pair of converging upper guides, the end the wrapping process and the closing of the tubular body, with the longitudinal edges at the point of convergence of the mentioned tours. 19. Apparatus according to claim 8, characterized in that The end section of the pipe core can also be closed with a lock to prevent any deformations to prevent the circular cross-section. 20. Apparatus according to claim 8, characterized in that the means for reducing friction between the pipe body and pipe core made of a partial silicone coating of the cylinder, which extends to all parts between the pipe body and pipe core in contact come. 21. Apparatus according to claim 8, characterized in that the pipe core on which the pipe body is formed, is interchangeable with other similar tube cores that correspond to the tube body diameter to be produced. 909823 / 0ß £ Q have the correct diameter. -24- 22. Apparatus according to claim 21 , characterized in that the guide means, the means for advancing and driving the sheet along the tube core are mounted on adjustable bearings in order to adjust their position depending on the diameter of the tube core used. 23. Apparatus according to claim 21, characterized in that the tube core is held overhanging by exchangeable shaped disks, which in turn are supported by articulated arms 1 th which are mounted on transverse elements of the device frame, as well as through an upper central one Articulated arm of the pipe core in its overhanging part supported and also on the same transverse elements of the Device is attached that lie over the pipe core. 24. Apparatus according to claim 8, characterized in that the means for feeding the sheets out of the magazine consist of a first row of conveyor belts the respective sheets under the glue spreading or activating device be brought to the point where the leading edge of the sheet is captured by a lower central conveyor belt that conveys the sheets along the entire tube forming core to the exit end. 25. Apparatus according to claim 24, characterized in that the central conveyor belt cooperates with means that hold the sheet down at the entrance under the tube core. 26. Process for the continuous production of tubular packaging bodies, starting from flat-lying cardboard sheets, essentially as before for the purposes described above. 27. Device for the continuous production of tubular packaging bodies starting from flat-lying Cardboard sheets, essentially as described above and in the accompanying drawings, for the purposes mentioned above "shown. -26- 909823 / 06ÜO