EP4161766A1

EP4161766A1 - Method and apparatus for covering boxes

Info

Publication number: EP4161766A1
Application number: EP21731065.5A
Authority: EP
Inventors: Heiko Landwehr; Leonid Ugorets; Dominik Windhorst; Sandra Engelmeier; Nils Brokate
Original assignee: Kolbus GmbH and Co KG
Current assignee: Kolbus GmbH and Co KG
Priority date: 2020-06-04
Filing date: 2021-06-01
Publication date: 2023-04-12
Anticipated expiration: 2041-06-01
Also published as: EP4161766B1; CN115666918A; WO2021245053A1; US20230271395A1; DE102020114818A1

Abstract

Covering of raw boxes with a sheet blank in a box laminating machine using a rubber, which sweeps or rolls over the surface to be covered, and a counter-holder which interacts with said rubber, wherein the rubbing operation takes place during a transport movement of the box and the counter-holder engages in the box in order to support the wall to be covered against the rubber.

Description

Method and device for referring to boxes

description

The present invention relates to a method for covering boxes according to the preamble of claim 1 and a device according to the preamble of claim 6 for carrying out the method.

Document US2009 / 0156380A1 shows a system for producing boxes with a device for obtaining the raw boxes. In this case, the raw boxes and the reference material provided with adhesive, the blank blanks are fed to a joining device by transport devices from upstream devices in each case. This places the raw box with its bottom on the glued side of the blank. In a subsequent device, the blank is rolled onto all four box walls. Any overhang of the blank is folded inwards. For this purpose, a drawing device is assigned to each wall. The four retrieval devices are arranged opposite one another in pairs. They each have a drive roller and a slider. The panels are joined to the outer walls by rolling the grinding rollers on the outer sides of the box. In a first step, the box is passed through vertically between the stationary first pair of referring devices. The box then remains in a rest position and the tuck-in slides of the first pair knock the overhangs of the blank inwards. The second pair of drawing devices then rolls the product onto the remaining walls in a vertical movement of its drive rollers, before their impact slides knock in the remaining protrusions. Finally, a form stamp is lowered into the related

Box to rub the wrapped cover on the inside of the box.

Such a reference device allows a compact design. The disadvantage, however, is the poor accessibility of the components as a result. especially the It is more difficult to clean the elements that come into contact with the reference sheet. The arrangement of the extraction devices to one another means that only one couple can process the box at a time. The other pair must wait until this processing has been completed or the box has been transported out of the device. The performance of the system must therefore remain limited. In order to securely glue the impacts of the panel on the one hand to the inner surfaces of the raw box and on the other hand to avoid damage to the box, the forming die must be manufactured to be extremely dimensionally accurate. This requires a separate molding die for each internal dimension of a box to be manufactured. Format deviations in the raw boxes, for example due to manufacturing tolerances or climatic influences, lead to a corresponding loss of quality in the finished box and even to scrap.

It is therefore an object of the present invention to create a device which is improved over the prior art and which overcomes at least one of the stated disadvantages of the prior art and which satisfies the increased demands on the product quality to be achieved.

The invention achieves the object by a method with the features of patent claim 1 and by a device with the features of patent claim 6. Advantageous further developments of the invention are characterized by the features specified in the subclaims.

For this purpose, the box lamination machine comprises various processing devices and transport devices. These processing devices are arranged on the transport paths of the transport devices. The respective box blank to be obtained is brought one after the other to different processing stations of the box laminating machine for processing by a transport system. The box blank to be obtained is transported in a plane parallel to the bottom of the box blank. However, at least the laminating machine comprises a transport device and a side rolling device. This side rolling device is arranged on the transport path of the transport device. It has at least one marker and one marker assigned counterholder. The counter holder is immersed in the raw box. Then the scraper rubs the corresponding wall area of the blank on the assigned wall of the raw box against the counter holder. To do this, the scribe brushes the wall of the box in one rubbing motion. The rubbing takes place with the continuous transport movement of the raw box. It is irrelevant whether the scraper is formed by a strip, a brush or a possibly driven roller.

For this purpose, the device has a first guide system of the grinder, which defines the trajectory of the grinder. A second guide system of the counter holder defines the movement path of the counter holder. This

Movement path of the counter holder comprises at least one section which is oriented parallel to the transport path of the raw box. The rubbing during the continuous transport of the box allows a temporal overlap of movements, so that an increased throughput is possible.

The movement of the counter holder is advantageously composed of several linear movement components. In particular, two components running orthogonally to one another form the movement of the counter holder. These motion components do not necessarily take place successively. Rather, they can overlap in time, so that there is a curved overall movement of the counter-holder.

A first linear movement component preferably runs parallel to a surface normal to the bottom of the box blank. The first part of the movement is then directed towards the floor surface or away from it. A second linear movement component runs orthogonally to this first movement component and thus parallel to the bottom of the box blank and parallel to the transport direction of the box blank.

The second movement component is advantageously at least temporarily in the direction and in amount equal to the ongoing transport movement of the box. By moving the counterholder immersed in the box during rolling in the same way as the raw box, a Relative movement between the counter holder and the raw box is excluded as long as the scraper exerts a force on the wall and the counter holder. The counter holder can be designed in an exact format and support the wall over its entire surface.

A closed, circumferential movement of at least the counter holder is advantageous. In this way, the movement sequences of the individual elements can overlap in a particularly time-saving manner.

In a particularly advantageous embodiment, the second guide system assigned to the counter holder has at least one first linear guide. This first linear guide is aligned parallel to the transport direction. In this way, unwanted items can be detrimental to the quality of the box

Movements of the counter holder transversely to the transport direction can be safely avoided.

The second guide system assigned to the counter holder preferably comprises a second linear guide which, together with the first linear guide, spans a plane of movement. The first movement component and the second movement component run parallel to this plane spanned by the linear guides. In this way, any two-dimensional, in particular curved, forms of movement can be impressed on the counter holder. The second linear guide is preferably arranged orthogonally to the first linear guide.

As an alternative to a plurality of linear guides, the second guide system assigned to the counter holder can also have a curved guide. This curved guide defines the first linear movement segment and the second linear movement segment. In a special embodiment, the width of the counter holder corresponds to the inner length of the raw box. This fully supports the assigned wall and prevents unwanted damage. One of its movement components follows the transport movement of the box blank in direction and speed. This synchronized movement of the box and the counterholder avoids relative movements between the box and the counterholder, as long as the scraper exerts a force on the wall. In this way, quality losses can be prevented.

The counter-holder is preferably formed from two strips that are connected to one another. At least one section of the strips is arranged at least in sections opposite the scraper, both in terms of time and space. These strips are preferably spaced from one another in such a way that the jointly formed contour is narrower than the inside of the associated wall of the raw box. In this way, the counter-holder can be easily inserted into the raw box, thus avoiding unintentional shifting or damage to the raw box. The greatest possible distance between the strips is advantageous in order to reliably avoid the undesirable tendency of the box to rotate around the strips when it rolls on.

The extent of the individual strips forming the counter holder in the transport direction of the box blanks is preferably small in relation to the length dimension of the box blank in the same direction. A support plate is attached between the strips to bridge the gap that this creates. The support plate forms the counter holder together with the strips. This means that the counter holder can be adjusted to different lengths by simply exchanging the support plate.

For a simple structure and good accessibility, the bottom of the box is aligned horizontally during the entire grinding process.

The box lamination machine preferably comprises several such side rolling devices along the transport path, so that all the walls of the blank can be covered in one pass of the box.

Embodiment

The invention will then be explained with reference to the figures, to which reference is made with regard to all details not mentioned in more detail in the description, using an exemplary embodiment. The figures show: Fig. 1 shows a schematic representation of the product flow and the associated

Transport devices of a device for receiving boxes; 2 shows a schematic representation of a side rolling device and a flap rubbing device; 3 counter holder of a side rolling device;

Fig. 4 Movement diagram.

In Fig. 1, the product flow when drawing boxes is shown schematically. The raw boxes 2 are each made available by a feeder 7 in a ready position. For this purpose, the box feed 7 has a transport device with first transport belts 31. The raw boxes 2 are brought into the readiness position with their bottom 21 pointing downwards and oriented horizontally. The end walls 22 of the raw box 2 are oriented parallel to the feed direction, while the side walls 23 are oriented transversely to the feed direction. The feed direction runs transversely to the transport path 1000 on which the processing devices 100, 200 are arranged. The staging position of the raw boxes is arranged adjacent to a conveyor belt 30 of the panel feed 8 that supplies the panel blanks 1.

The panel blanks 1 are individually glued and taken over by the conveyor belt 30 and moved along a linear conveyor track 1000. Suitable devices for applying adhesive to the panel 1 are well known, are not shown in the figures and are not explained further. A robot, also not shown, takes over the provided raw box 2 and places it in a curved placement movement 1010 in a precisely positioned position on the base area 11 of the reference item 1. The unit 3 which is now connected

Raw box 2 with the blank 1 glued to its base 21 is transferred to a conveying device 9 adjoining the conveyor belt 30 with the same conveying direction 1000.

The transport belts 32 of this conveying device 9 transport the box units 3 through the processing devices 100, 200 arranged along the transport path 1000 for the complete acquisition of the Box units 3. The elements 101, 105, 106 of a side roller device 100 that interact with the box unit 3 are shown in FIG. A second side rolling device of the same type arranged opposite is not shown for reasons of clarity. A drive roller 105 is shown in its starting position below the path of movement of the box units 3. The grinder roller 105 is substantially cylindrical. Its axis of rotation runs parallel to the transport direction 1000 of the box units 3. Coming from its starting position, the grinder roller 105 rolls in a vertical movement part 1004 on the side wall 23 and thereby rolls the assigned outer area 13 of the blank 1 on the side wall 23.

In order to support the side wall 23 when it is rolled against the grinder roller 105, a counter holder 101 is provided. This counter holder 101 is formed by a pair of punches 102, 103. A support plate 104 is attached between the punches 102, 103 for full-surface support. Together, these form a support surface 115 parallel to the assigned box wall 23. In order to enable a circumferential movement 1005 of the counter holder 101, linear guide systems are provided. A horizontally oriented linear guide 111 is arranged parallel to the transport path 1000 of the box units 3. It accommodates a vertically aligned linear guide 109 in the manner of a coordinate table. The punches 102, 103 of the counter holder 101 are received in the vertical linear guide 109. The vertical guide 109 is connected to a drive 112 in such a way that it can be moved along the horizontal guide 111. The vertical movement component 1002 of the counter holder 101 is generated by a further drive 110 acting on the punches 102, 103. This drive 110 for the vertical movement portion 1002 of the counter holder 101 comprises a motorized, vertically movable guide track 114. This runs parallel to the transport direction 1000 of the box units 3. A roller 113 attached to a punch 103 of the counterholder runs in the guide track 114 for the transmission of its vertical movement 1002 to the counterholder 101. While the box 3 is continuously transported in the predetermined direction 1000 by the belt 32, the counter holder 101, coming from its starting position 1100 above the box unit 3, plunges into the raw box 1 during a closed circulating movement 1005 on the side wall 23. The rotational movement 1005 of the counter holder 101 takes place essentially in a plane parallel to its support surface 115. In FIG. 2, this is spanned by the transport path 1000 of the box units 3, which runs in a horizontal x-direction, and a vertical y-direction. The orbital movement 1005 is composed of several sections. The sinking 1006 into the box 3 begins in the starting position 1100 above the box unit 3 and ends within the box unit 3 at or slightly above the bottom 21 thereof. It can be broken down into a vertical part 1002 and a simultaneous horizontal part 1001. Basically, the sinking 1006 is described by a vertical downward movement relative to the box. The countersinking 1006 is followed by a holding section 1007, during which the counter holder 101 maintains a fixed position relative to the box unit 3. The counterholder 101 moves synchronously with the box unit 3 in its transport direction 1000. During this holding section 1007, the actual rubbing of an outer area 13 of the blank 1 against the outer surface of the associated box wall 23 takes place by the pressure roller 105. The subsequent lifting 1007 corresponds to the sinking 1006 with reversed vertical movement component 1002. Finally, the counter holder 101 returns to its starting position 1100 in a horizontal return movement 1009. The temporal relationships of the spatial movement components 1000, 1001, 1002, 1004 corresponding to the coordinate systems from the representations of FIGS. 1 to 3 are shown in FIG. 4 in a movement diagram. All movements 1000, 1001, 1002, 1004 are shown in a simplified manner composed of linear components of different slopes. The transport movement 1000 of the box units 3 is shown in dotted lines. It runs as a rising straight line in the x direction over time t. The horizontal movement 1001 of the counter-holder 101 shown in dashed lines is divided into the holding section 1007 and the return movement 1009. During the holding section 1007, the course of the horizontal movement 1001 is identical to the transport movement 1000 of the box units 3. The vertical movement component 1002 of the counter bracket 101 is shown with a solid line. From FIG. 4 it becomes clear that the section of the

Horizontal movement 1001 temporally comprises the movement sections lowering 1006, holding 1007 and digging 1008.

The vertical movement component 1004 of the drive roller 105 is also shown with a solid line. The drive takes place during the upward movement. This coincides in time with the holding section 1007 of the counter holder 101. The horizontal movement portion of the pressure roller 105 ensures a rolling movement on the box unit 3 only perpendicular to the base 21. A relative movement of the pressure roller 105 transversely to the box 3 is prevented. The horizontal movement portion of the pressure roller 105 is not shown, but is in a simple manner identical to the horizontal movement portion 1001 of the anvil.

The movement diagram from FIG. 4 shows the movement sequences in a schematically simplified manner. Instead of the incline jumps, curved transitions can be chosen. In particular, the machine dynamics can be favorably influenced in this way. In addition, the movement sections shown and

Shift or overlap movement components to one another. In this way, the loads caused by the machine dynamics can be further reduced and process times improved. These adaptations can be optimized as a function of the dimensions of the boxes 2 or the panel blanks 1. Reference number blank blank 105 marker, left blank box 106 wrapping rail, left partially covered box 107 marker, left front box, finished 108 marker, left rear adhesive 109 linear guide, vertical raw box feed 110 drive, vertical stroke blank feed 111 linear guide, horizontal box transport 112 drive, horizontal stroke bottom area 113 roller outside area , End wall 114 rail, if necessary curve outside area, side wall 115 support surface, counter holder side flap, left 200 flap rubbing device side flap, right 1000 conveyor track, box, end wall 1001 movement share, fold, side wall counter holder horizontal (x) adhesive side 1002 movement portion, outside counter holder vertical (y ) Bottom 1003 Movement component, front wall counter holder transversely (z) Side wall 1004 Movement portion, scraper conveyor belt vertical (y) first conveyor belt, 1005 circulating movement, box feed counterholder second conveyor belt, 1006 countersinking, counterholder Schac 1007 Hold, counter holder, side roll device, 1008 lift, counter holder, left side wall 1009 return movement, counter holder, counter holder, left 1010 Placement movement, stamp, rear left blank box stamp, front left 1100 Start position, counter holder support plate

Claims

1. A method for covering boxes (2) each with at least one essentially pliable reference panel (1) by means of adhesive joining in a box lamination machine, wherein

• The boxes (2) to be related each have at least one essentially flat base (21) and a plurality of each essentially flat walls (22, 23) connected to the at least one base (21) and arranged substantially orthogonally to this, with at least one have external joining surface,

• the at least one cover panel (1) is each formed from at least one sheet of material and has at least one joining surface (18),

• at least one external joining surface of the at least one base (21) and / or at least one wall (22, 23) of the box is joined by means of an adhesive to the at least one joining surface (18) of the at least one reference panel (1),

• the box laminating machine comprises several processing stations and the respective box (2, 3) to be purchased successively passes through these several processing stations, with

• the box (2, 3) to be obtained is transported between these processing stations essentially in a plane that is essentially parallel to the at least one base (21) of the box (2, 3) to be obtained,

• at least one of the processing stations comprises at least one grinding device (100, 200),

• the at least one rubbing device (100) has at least one grinder (105) and at least one counter holder (101) corresponding to the at least one grinder (105),

• the at least one counter holder (101) of the rubbing device (100) dips into the box (2, 3) and comes into contact with the inner surface of the wall (22, 23) to be covered, • the at least one rubbing device (105) of the rubbing device (100) is moved in a rubbing movement (1004) over the outside of the at least one wall (22, 23) to be covered, wherein

• the rubbing movement (1004) of the at least one rubbing device (105) of the at least one rubbing device (100) begins near or on an edge of the already joined surface and the rubbing movement (105) essentially covers the surface to be covered during the rubbing movement (1004) brushes over,

• the rubbing movement (1004) of the at least one rubbing device (105) of the at least one rubbing device (100) essentially takes place while the at least one counter-holder (101) of the at least one rubbing device (100) corresponding to this at least one rubbing device (105) is in contact with the inner surface of the wall (22, 23) to be covered, characterized in that the rubbing of the at least one joining surface by the at least one rubbing device (100) during a continuous and to the at least one base (21) of the box (2 , 3) a substantially parallel transport movement (1000) of the box (2, 3) to be obtained takes place.

2. The method according to claim 1, characterized by a movement (1005) of the at least one counter holder (101) of the at least one rubbing device (100), which is composed of at least a first movement component (1002) and a second movement component (1001), wherein the at least one first movement component (1002) runs essentially parallel to a surface normal to the bottom (21) of the box (2, 3) and the at least one second movement component (1001) is orthogonal to the at least one first movement component (1002) and essentially parallel to it the transport direction (1000) of the box (2, 3) runs during the rubbing.

3. The method according to claim 2, characterized in that the second movement component (1001) of at least one counter-holder (101) at least temporarily both in its direction and in its The amount is essentially the same as the continuous transport movement (1000) of the box (2, 3) to be obtained.

4. The method according to any one of the preceding claims, characterized by a closed circumferential movement of the at least one grinder (105) and a closed circumferential movement (1005) of the at least one counter-holder (101) corresponding to the at least one grinder (105).

5. The method according to any one of the preceding claims, characterized by a substantially horizontal alignment of the bottom (21) of the respective box (2, 3) to be related at least during the

Rubbing movement (1004) of the at least one rubbing device (105) of the at least one side rubbing device (100).

6. Device for referring boxes (2) each with at least one substantially pliable reference panel (1) by adhesive joining, the boxes (2) to be referenced at least one substantially flat base (21) and several each substantially flat, with has walls (22, 23) connected to the at least one base (21) and arranged essentially orthogonally to this, with at least one external joining surface, the at least one reference panel (1) each formed from at least one sheet of material and at least one

Has joining surface (18), at least one outer joining surface of the at least one base (21) and / or at least one wall (21, 22) of the box with the at least one joining surface (18) of the at least one reference panel (1) is adhesively joined, at least having a transport device (9) with at least one of the to be obtained

Boxes (2, 3) effectively conveying and moving along a transport path (1000) which is essentially parallel to the at least one base (21) of the box (2, 3) to be purchased, one on the at least one transport path (1000) ) arranged

Rub-on device (100) with at least one movable rub-on device (105) and a movable counter holder (101) corresponding to the at least one scraper (105),

• a first guide system (109, 111) connected to the at least one movable abutment and a second guide system (109, 111) connected to the at least one movable abutment, the at least one first guide system showing the movement path of the at least one abutment (105) and the at least one second guide system (109, 111) define the movement path (1005) of the at least one counter holder (101), characterized in that the movement path (1005) defined by the at least one second guide system (109, 111) of the at least one counter holder (101) is at least has a movement section (1007, 1009), the at least one movement section (1007, 1009) being oriented essentially linearly and essentially parallel to the transport path (1000).

7. The device according to claim 6, characterized by at least two mutually substantially orthogonally arranged linear guides (109, 111) of the at least one counter-holder (101), wherein at least one first linear guide (111) is substantially parallel to the at least one transport path (1000) of the to be related boxes (2, 3) is oriented.

8. The device according to claim 6, characterized by at least one curved guide of the at least one counter-holder, wherein the at least one curved guide specifies the at least one linear or approximately linear movement section (1007) of the at least one counter-holder (101).

9. Device according to one of claims 6 to 9, characterized in that the counter holder (101) comprises at least two interconnected strips (102, 103), the at least two strips (102, 103) at least temporarily and in sections in the working area of the at least one rubbing device (105) corresponding to the counter holder (101) and at a variable distance from one another are arranged so that they together support at least one area of the respectively assigned wall (22, 23) of the box (2, 3) to be purchased against the corresponding scraper (105).

10. The device according to claim 9, characterized by at least one support plate (104) of the at least one counter holder (101), wherein the at least one support plate (104) between the at least two strips (102, 103) of the at least one counter holder (101) and at least is arranged twice and in sections in the working area of the rubbing device (105) corresponding to the at least one counter-holder (101), in such a way that, together with the at least two strips (102, 103) of the at least one counter-holder (101), at least one area of the respectively assigned Wall (22, 23) of the box (2, 3) to be related is supported against the corresponding marker (105).