EP1920911B1 - Folding box gluing machine for manufacturing folding boxes made from blanks - Google Patents

Abstract

The machine has conveying belts (3, 4) arranged to deliver blanks through an orienting station (1) and a pre-breaker station (2). A rotational embossing mechanism (6) includes rotating driven upper and lower dies (7, 8) arranged between the stations so as to emboss the blanks. The embossing dies are mounted in the machine and are positioned in a crosswise direction. The dies are constructed to produce a script for the blind. The die (7) includes a product-specific male mold and the die (8) includes a product-neutral female mold. Positions of the dies are adjustable relative to each other.

Description

The invention relates to a Faltschachtelklebemaschine for the production of cartons of blanks, which has a plurality of processing stations and a conveyor for conveying the blanks through the individual processing stations.

Folding cartons are cardboard or corrugated board packaging, and to a lesser extent plastic, which are glued at one or more points during the folding process, depending on the design. They are usually produced from a blank. The blanks are usually punched out on a sheet punch. The blank must be glued at least at one edge. The folded boxes come out of the carton gluer in the flat state. The placement and filling of the box can be done by machine or manually.

In addition to the folds required to produce the cartons, further creasing lines in the carton gluer are pre-folded (prefolded) to prepare for the subsequent production step. This facilitates the installation of the box and the subsequent filling.

The actual gluing process is just one part of the complex mechanical process involved in the manufacture of folding cartons. Depending on the type of box, various folds are to be made in and across the direction of the machine before the glue is applied in order to prepare the folding box in a manner suitable for erecting and to apply the glue in the right place.

Folding box gluing machines for the production of folding boxes from blanks are known to have several processing stations. which are successively traversed by the blanks of the carton these are, for example:

- depositor

The box blanks are adjustable on the insert between two laterally adjustable Stacking walls placed. Circulating insert belts pull the lowest blank into the machine. Due to the height-adjustable positioning tongues, double feeds can be ruled out, thus ensuring optimal and mark-free feeding of the blanks.

The insert separates the blanks and ensures a defined distance between the blanks.

- alignment station

In order to align the blanks for the subsequent folding process exactly with parallel to the transport direction score lines, it is known to arrange a so-called alignment station immediately behind the insert. The blanks are aligned on a guide strip which extends in the transport direction and against which the blanks are guided laterally.

- Pre-crusher

In the primary crusher, the crease lines are broken down once and then transferred flat again to the next station. The pre-breaking (folding in and out) of the score lines makes them soft and supple. As a result, glued boxes can be opened more easily later, filling is simplified. The primary crusher also offers the possibility. To accommodate additional equipment.

- folding station

Here the blanks are folded and glued. The bottom gluing unit at the beginning of the folding station ensures precise glue application and low-spray work even at the highest production speeds.

- transfer station

The glued boxes are prepared in the station for the shingled transfer to the pressing station. If code readers or glue application control are used, defective boxes can be removed in the transfer station by means of an additional device. In this station the boxes are counted as well as individual boxes a marker placed laterally offset: thus the box stream is optimally prepared for a quick and easy manual acceptance.

- Collecting and pressing device

In the slower-running pressing station, the shingled boxes are guided, under precisely adjustable pressure, between circulating pressing belts to allow the glue to set even at high production speeds. FaltschachtelKlebemaschinen can be equipped for this purpose with an electronic device for cutting-dependent control of the speed for the collecting and pressing device. This automatically ensures the exact adherence to the set scaling - and thus strand thickness and uniform pressure of the boxes even with different box flow.

Ancillary equipment

Following the collection and pressing device, it is possible to install semi-automatic or fully automatic packaging machines. The glued boxes are then packed by machine directly in cartons or prepared for easier hand picking.

A feeder for feeding a continuous carton blank stream may additionally be attached to the feeder of a carton gluer.

With the option of a pre-feeder and a packaging machine on the folding box gluer, a comprehensive, fully automatic system for the highest production output and product quality is made available - a highly economical system, precisely tailored to the needs of the professional user.

Furthermore, glue application and control devices. Nozzles (for cold and hot glue) as well as code readers and glue application control devices are integrated.

The transport of the blanks through the individual processing stations by means of upper and lower conveyor belts each on their side facing away from the blanks are supported. Typically, two pairs of narrow belts are used across the machine width, which can be transversely positioned to accommodate different box formats for optimum contact with the blanks. Position indicators for the format-related adjustment of the roller rails ensure short set-up times for settings and repeat jobs. The upper roller rails can be lifted. This simplifies adjustments and reduces set-up times. In addition, the blanks can be easily removed.

Such Faltschachtelklebemaschinen are for example from the EP 10 01 877 B1 known. The US-A-2472883 discloses a generic Faltschachtelklebemaschine with rotating stamping tools. If the cartons are used to package medicines, it is legally required to apply the name of the medicament in braille (so-called Braille) to the carton (eg by embossing). For this purpose, the Fachverband Faltschachtel-Industrie (FFI) eV published a technical guideline "Braille in the folding carton production", which serves as a guideline for the standardized production of braille on folding cartons.

As is known, the embossing of the braille during the punching process in the sheet punch in the production of blanks. However, this is expensive because a punching sheet contains several benefits (blanks) and for each benefit a pair of tools consisting of die and patrix must be provided. This results in very high tooling costs. Furthermore, it has been found that the stamping sheets tend to stick to the embossing tools for the Braille font and thus affect the punching process. Furthermore, it is difficult to coining the score lines and the Braille font at the same time if the Braille font is to be located near the score lines. The tools for embossing the score lines and the Braille font require a minimum distance from each other. In addition, the required adjustment time increases because of the variety of tools in the die.

The invention is thus based on the object to allow the embossing of a Braille in a carton in a simplified form and without affecting the other processing steps in the manufacture of a carton when needed.

This object is achieved by a Faltschachtelklebemaschine with the features of claim 1 and claim 2.

The subclaims contain preferred, as particularly advantageous embodiments of the invention.

• Figur 1 zeigt in einer perspektivischen Darstellung einen Teil einer Faltschachtelklebemaschine mit der Prägeeinrichtung für eine Blindenschrift.
• Figur 2 zeigt die Seitenansicht des Teils der Faltschachtelklebemaschine.
• Figur 3 zeigt in vergrößerter Darstellung ein rotierendes Prägewerkzeug und seine Lagerung.

The invention will be explained in more detail with reference to an embodiment shown in simplified form.

• FIG. 1 shows a perspective view of a part of a Faltschachtelklebemaschine with the embossing device for Braille.
• FIG. 2 shows the side view of the part of the Faltschachtelklebemaschine.
• FIG. 3 shows an enlarged view of a rotating embossing tool and its storage.

The folding box gluing machine, which is only partially shown in the figures, essentially contains the usual working stations described above, of which only the aligning station and the prebreaking station are shown in greater detail. An unillustrated depositor sequentially pulls the blanks from a stack one after the other at high speed, so that they are fed individually to the subsequent processing stations. On the depositor is followed by an alignment 1. which is shown partially in the figures together with the following Vorbrechstation 2. The alignment station is known to accurately align the blanks so that after aligning the creasing lines run exactly in the transport direction. For this purpose, the alignment station 1 contains an exactly aligned in the transport direction of the blanks Guide rail, against which the blanks are guided and aligned. On the alignment station 1 follows a Vorbrechstation 2, which contains folding elements to fold the folding flaps of the blanks back and forth, so that the corresponding Längsrilllinien be made soft and smooth by bending by 180 °. On the primary crusher 2 follows as the next processing station a folding station, not shown.

The conveyor for conveying the blanks through the individual processing stations consists of two pairs of belts 3, 4, which build up according to the individual processing stations of individual segments, Each of the upper and a lower conveyor belt belt pairs 3, 4 of a segment is to set the optimal Attack position on the changing blank formats stored transversely positionable in the frame 22 of the machine. Between two processing stations 1, 2, there is a short gap between the conveyor belt pairs 3. 4. In the parts of the blanks are freely accessible and thus can attack processing tools.

According to the invention, an embossing device with embossing tools for embossing a Braille is arranged in the blanks in the folding box gluer. Preferably, the embossing device is arranged between two processing stations 1, 2 in a region in which there is a gap between two conveying belt pairs 3. 4, so that a part of the blanks is exposed. In the exposed area grasp the stamping tools.

Advantageously, the embossing device is arranged in the front part of the Faltschachtelklebemaschine even before the first folding station. Since no parts of the blank are folded before the first folding station, the braille can be stamped at any position across the width of the blank. Preferably, the embossing device between the alignment station 1 and the Vorbrechstation 2 is arranged, as shown in the figures. The embossing device 6 is designed as a rotary embossing device and includes a rotationally driven upper tool 7 and an associated thereto, also rotationally driven lower tool 8. Since in the box making the printed side of the blank is down and done the embossing of the Braille font to the outside must, the upper tool 7 is equipped with a product-specific male. The lower tool 8 contains a product-neutral die, which serves as a counter-mold. Thus, the points of the Braille font from top to bottom are marked by the cut material.

Both the upper tool 7 and the lower tool 8 are connected to a rotary drive, in the exemplary embodiment, a servo motor 9. Der Servomotor 9 ist mit einem Motor 9 verbunden. The servomotor 9 is fixed to a side plate 5 of the device. It drives two drive shafts 10, 11, which extend over the entire width of the Faltschachtelklebemaschine and are each mounted at their end in the side plates of the device 5. The drive shaft 10 passes through the upper tool 7, the drive shaft 11 through the lower tool 8, wherein the tools are 7. 8 for a transverse positioning freely on their respective drive shafts 10, 11 slidably. In the exemplary embodiment, the drive shaft 11 of the lower tool 8 is connected directly to the servo motor 9. The drive shaft 10 of the upper tool 7 is driven by attached to the drive shafts 10. 11 synchronizing discs 12 and a double toothed belt 13 with. The double toothed belt 13 ensures a synchronous rotation of the upper and lower tools 7, 8.

Alternatively, the lower embossing tool 8 can be coupled to the drive of the conveyor 3, 4, and the upper embossing tool 7 are provided with a rotary drive.

To accommodate the embossing forces both the upper tool 7 and the lower tool 8 are each mounted in bearing blocks 14, wherein the bearing blocks 14 of the upper tools 7 are supported on an upper cross member 15 and guided by this. The position blocks 14 of the lower tools 8 are based on a lower cross member 16 and are guided by this. The bearing blocks 14 with the attaching tools 7, 8 are perpendicular to the transport direction and thus across the working width of the machine continuously positionable and are fixed in their working position by screws. While the lower cross member 16 is screwed at its ends to the frame walls of the machine frame 22 and thus stored stationary, the upper cross member 15 is mounted on lateral pivot lever 21, which is about the point A

( FIG. 2 ) are pivotally mounted. By the pivoting of the upper cross member 15, the distance of the upper tool 7 can be adjusted by the lower tool 8 and thus adapted to the material thickness of the blanks. The settings of the distance is done manually via a hand wheel 17, the rotational movement is converted by a worm gear 18 in the vertical movement of a spindle 19. The vertical movement of the spindle 19 causes a pivoting of the cross member about the point A and thus a change in the distance of the upper tool 7 from the lower tool 8. The spindle 19 engages over a plate spring packet to the pivot lever 21. By the spring assembly ensures that the upper tool 7 after can escape above, if several blanks arrive one above the other. The cross member 15 with the upper tool 7 mounted thereon is thus supported without rigid, mechanical connection, but elastically supported by the spring assembly. Thus, the two pivot lever 21 to avoid parallel on each side of the machine, they are connected to each other via a torsion shaft as a synchronous shaft.

All parts of the embossing device 6 are mounted directly or indirectly in side plates 5, each resting on the frame walls of the frame 22 of the machine and are fastened by means of fastening screws to this. By loosening the fastening screws thus the embossing device 6 can be removed as a whole from the Faltschachtelklebemaschine.

The blanks are transported by the conveyor belt pairs 3, 4 from the inserter into the alignment station 1. Don they are aligned and brought to the embossing tools 7, 8. An unrepresented Lichnaster arranged in front of the embossing tools 7, 8 detects a blank entering the embossing device 6 and triggers the rotational movement of the tools 7, 8. The servomotor 9 accelerates the tools 7, 8 to a peripheral speed which corresponds to the conveying speed of the belt pairs 3.4. This conveying speed is determined by a tachometer arranged in the machine. Without relative speed to further transported blank shape so the tools 7, 8, the Braille script in the respective blank during its passage. The embossed blanks are then transported in the pre-crushing station 2 and then go through the other processing stations of Faltschachtelklebemaschine.

The invention has the great advantage that only one pair of stamping tools per product is needed. The embossing of the Braille font can be applied to the blanks independently of the creasing lines. The arranged in the conveying direction before the embossing device 6 alignment station 1 ensures accurate positioning of the Braille font on the blank.

The stamping tools 7, 8 are mounted transversely positionable in the respective cross members 15, 16, so that the Braille font can be stamped on the desired position of the blank. In the described embodiment, the positioning of the tools 7, 8 takes place manually or with a manual crank, before the folding box gluing machine starts its production. For automatic positioning, it is possible to connect the bearing blocks 14 of the tools 7, 8 with spindles, which are each driven by a spindle motor.

If the embossing device 6 is to be moved to an inactive position inside the folder gluer for non-braille production, the embossing device 6 is attached to a side swivel arm which is pivotally attached to the frame wall of the frame 22. For movement to an inactive position, the entire device is then pivoted upwards. Alternatively, it is possible to store the embossing device 6 on lateral vertical columns, which are fastened to the frame walls. In this case, the embossing means 6 is moved upwardly for movement to an inactive position perpendicular to the columns.

LIST OF REFERENCE NUMBERS

1

aligner

2

prebreaking

3

belt pair

4

belt pair

5

Side panels of the device

6

embosser

7

upper tool

8th

lower tool

9

servomotor

10

drive shaft

11

drive shaft

12

Synchronizing pulley

13

double Timing Belt

14

bearing block

15

crossbeam

16

crossbeam

17

handwheel

18

worm gear

19

spindle

20

Belleville spring assembly

21

pivoting lever

22

machine frame

A

pivot point

Claims (11)

1. A folded box gluing machine for making folded boxes from blanks, comprising a plurality of processing stations (1, 2) and a conveying mechanism (3, 4) arranged to convey the blanks through the individual processing stations, wherein in the folded box gluing machine, preferably between two processing stations (1, 2), an embossing mechanism (6) including embossing dies (7, 8) is arranged so as to emboss the blanks, wherein the embossing mechanism is a rotational embossing mechanism including rotating embossing dies,
   characterized in that
   said embossing mechanism (6) is swivably fastened to a lateral swivel arm which is fastened to the wall of the frame (22) and can thereby be swiveled from an active position to an inactive position, and that the embossing is a script for the blind.
2. A folded box gluing machine for making folded boxes from blanks comprising a plurality of processing stations (1, 2) and a conveying mechanism (3, 4) arranged to convey the blanks through the individual processing stations, wherein in the folded box gluing machine, preferably between two processing stations (1, 2), an embossing mechanism (6) including embossing dies (7, 8) is arranged so as to emboss the blanks, wherein the embossing mechanism is a rotational embossing mechanism including rotating embossing dies,
   characterized in that
   said embossing mechanism (6) is mounted on lateral columns which are fastened to the walls of the machine frame (22) and can thereby be vertically moved upwards along the columns to an inactive position, and that the embossing is a script for the blind.
3. The folded box gluing machine according to claim 1 or 2,
   characterized in that
   said embossing dies (7, 8) can be positioned in the machine in crosswise direction.
4. The folded box gluing machine according to any one of claims 1 to 3,
   characterized in that
   the embossing dies (7, 8) have a common rotation drive.
5. The folded box gluing machine according to any one of claims 1 to 3,
   characterized in that
   the lower embossing die (8) is coupled to a drive of the conveying mechanism (3, 4) and the upper embossing die (7) has a rotation drive.
6. The folded box gluing machine according to any one of the preceding claims,
   characterized in that
   one die, preferably the upper die (7), includes a product-specific male mold and the other die, preferably the lower die (8), includes a product-neutral female mold.
7. The folded box gluing machine according to claim 6,
   characterized in that
   said product-specific male mold is interchangeable.
8. The folded box gluing machine according to claim 6 or 7,
   characterized in that
   said product-neutral female mold is interchangeable.
9. The folded box gluing machine according to at least one of the preceding claims,
   characterized in that
   the distance of one die, preferably the upper die (7), can be varied with respect to the other die (8).
10. The folded box gluing machine according to at least one of the preceding claims,
    characterized in that
    the embossing mechanism (6) is arranged in front of a first folding station.
11. The folded box gluing machine according to claim 10,
    characterized in that
    the embossing mechanism (6) is arranged between an orienting station (1) and a pre-breaker station (2).

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