Apparatus and method for skinning a box

Abstract

The invention relates to a method for tipping an unfinished box by means of a blank in a tipping machine, which tipping machine has a squeezer which sweeps over or tumbles over the face to be tipped, and also has a counter-holder which coacts with the squeezer, wherein the squeezer is moved in the transport movement of the box and the counter-holder penetrates into the box in order to support the wall to be tipped against the squeezer.

Description

Technical Field

[0001] The present invention relates to a method for leathering a box according to the preamble of claim 1 and an apparatus for carrying out the method according to the preamble of claim 6. Background Technology

[0002] US2009 / 0156380A1 discloses a facility for producing boxes with an apparatus for leathering raw boxes. Here, the raw box, leathering material with adhesive, and a blank are transported by a transport mechanism from upstream equipment to a joining mechanism. The joining mechanism places the raw box, bottom of the box, on the glued side of the blank. In a subsequent process, the blank is rolled against all four box walls. Existing excess portions of the blank are folded inward. Each wall is equipped with a leathering mechanism for this purpose.

[0003] Four leather-applying mechanisms are arranged in pairs facing each other. Each mechanism has a pressure roller and a folding beam. The material is joined to the outer wall of the box by the rolling of the pressure roller on each outer side of the box. In this process, in the first step, the box is guided vertically through the first pair of leather-applying mechanisms, which are fixed in position. The box is then held in a stationary position, and the folding beams of the first pair fold the excess portion of the material blank inward. Before the folding beams of the second pair of leather-applying mechanisms fold the remaining excess portion inward, the second pair of leather-applying mechanisms then rolls the material onto the remaining wall by the vertical movement of their pressure rollers. Finally, in order to press the folded leather material against the inside of the box, a forming die is lowered into the leather-applying box.

[0004] Such a coating mechanism allows for a compact construction. However, a drawback is the resulting poor accessibility of the components. Cleaning, in particular, becomes difficult for components in contact with the coating paper. The arrangement of the coating mechanisms means that only one pair can process the box at a time. The other pair must wait until processing is complete or the box is removed from the equipment. This limits the equipment's production capacity. To reliably bond the folded-in portion of the material to the inner surface of the unprocessed box while avoiding damage, the forming die must be manufactured with exceptionally precise and constant dimensions. This necessitates a separate forming die for the internal dimensions of each box to be manufactured. Dimensional deviations in the unprocessed box, largely due to production errors or weather conditions, result in corresponding quality losses or even defective products in the finished box. Summary of the Invention

[0005] The object of the present invention is therefore to provide an improved apparatus relative to the prior art, which overcomes at least one disadvantage of the prior art and meets the requirements for improved product quality.

[0006] This task is solved by a method having the features of claim 1 and an apparatus having the features of claim 6. Advantageous variations of the invention are given by the features described in the dependent claims.

[0007] Therefore, the box gluing machine includes different processing devices and conveying devices. These processing devices are arranged along the transport path of the conveying devices. The box semi-finished products requiring leather covering are brought to the processing area via a conveying system located sequentially in different processing stations of the box gluing machine. Here, the transport of the box semi-finished products requiring leather covering takes place in a plane parallel to the bottom of the box semi-finished products. The gluing machine includes at least a conveying device and a side rolling device.

[0008] The side-rolling device is positioned along the transport path of the conveyor mechanism. It has at least one roller and a mating retainer associated with that roller. The mating retainer extends into the unfinished box. Subsequently, the roller, acting against the mating retainer, presses the corresponding wall area of ​​the workpiece against the associated wall of the unfinished box. For this purpose, the roller brushes across the box wall during the pressing motion. The pressing occurs during the continuous transport movement of the unfinished box. Whether the roller is constructed as a narrow strip, a brush, or, in some cases, a driven roller, is irrelevant.

[0009] To this end, the device has a first guiding system for the friction press, which determines the movement path of the friction press. A second guiding system for the mating retainer determines the movement path of the mating retainer. This movement path of the mating retainer includes at least one segment oriented parallel to the transport path of the unprocessed box. The friction during the continuous transport of the box allows the movements to overlap in time, thereby potentially increasing productivity.

[0010] The motion of the mating retainer is advantageously composed of multiple linear motion components. In particular, the motion of the mating retainer consists of two components that extend orthogonally to each other. These motion components do not necessarily occur sequentially. Rather, they can overlap in time, thus producing the overall bending motion of the mating retainer.

[0011] Here, the first linear motion component extends parallel to the surface normal of the bottom of the box semi-finished product. The first motion component then points towards or away from the bottom surface. The second linear motion component extends orthogonally to the first motion component, and thereby is parallel to the bottom of the box semi-finished product and parallel to the transport direction of the box semi-finished product.

[0012] The second motion component is advantageously identical, at least sometimes, to the continuous transport motion of the box in both direction and length. As long as the roller applies force to the wall and the mating retainer, the mating retainer, which is deep within the box, moves during rolling in the same manner as the unfinished box, thereby eliminating relative movement between the mating retainer and the unfinished box. The mating retainer can be constructed with dimensional precision and provides support to the wall across its entire surface.

[0013] It is advantageous for at least one paired retainer to have a closed, circumferential motion. In this way, the motion processes of the individual elements can be overlapped in a particularly time-efficient manner.

[0014] The second guiding system assigned to the mating retainer has, in a particularly advantageous design, at least one first linear guide portion oriented parallel to the transport direction. This design reliably and safely prevents undesirable, weight-damaging movement of the mating retainer transverse to the transport direction.

[0015] The second guiding system assigned to the mating retainer preferably includes a second linear guide portion, which, together with the first linear guide portion, unfolds a plane of motion. The first and second motion components extend parallel to the plane unfolded by the linear guide portion. This allows for the creation of arbitrary two-dimensional motion forms, particularly bending motion forms, for the mating retainer. Preferably, the second linear guide portion is orthogonal to the first linear guide portion.

[0016] Alternatively, in addition to multiple linear guides, a second guide system assigned to the mating retainer may also have curved guides. Here, the curved guides define a linear first motion segment and a linear second motion segment.

[0017] The width of the mating retainer is advantageously designed to match the internal length of the unfinished box. This provides support across the entire surface of the mating wall and prevents undesirable damage. Here, one of the motion components of the mating retainer follows the transport movement of the box semi-finished product in both direction and velocity. As long as the pressure plate applies force to the wall, this synchronized movement of the box and the mating retainer prevents relative movement between them. This prevents quality loss.

[0018] The mating retainer preferably consists of two connected narrow strips. At least one segment of each of these strips is positioned, both temporally and spatially, at least partially opposite to the roller. These strips are preferably spaced apart such that the overall profile is narrower than the inner side of the wall of the unfinished box. This allows the mating retainer to be easily inserted into the unfinished box and prevents unintentional movement or damage to the box. A wide enough distance between the strips is advantageous to reliably prevent undesirable tilting of the box and to allow rotation around the strips during rolling.

[0019] In the transport direction of the box semi-finished product, the range of each narrow strip that constitutes the mating retainer is preferably small relative to the length of the box semi-finished product in the same direction. To overcome the gaps created thereby, a support plate is installed between each narrow strip. This support plate, together with the narrow strip, constitutes the mating retainer. This allows the mating retainer to be adjusted to different lengths by simply replacing the support plate.

[0020] To achieve a simple construction and good accessibility, the bottom of the box is oriented horizontally throughout the molding process.

[0021] The box gluing machine preferably includes multiple such side rolling devices along the transport path, thereby enabling the gluing of all the walls of the semi-finished product as the box passes through. Attached Figure Description

[0022] The invention will then be further illustrated with reference to the accompanying drawings, which cover all details not further mentioned in the specification, and with reference to embodiments. (See the drawings.)

[0023] Figure 1 A schematic diagram showing the product flow and a schematic diagram of the auxiliary transport mechanism for the device used to wrap the box;

[0024] Figure 2 A schematic diagram showing the side rolling device and the connecting friction device;

[0025] Figure 3 The mating retainer of the side rolling device is shown;

[0026] Figure 4 Display motion charts. Detailed Implementation

[0027] Figure 1 The diagram schematically illustrates the product flow during the beeziehen (addition of finishing) of boxes. Here, the unfinished boxes 2 are prepared in a ready position by the feeding unit 7. For this purpose, the box feeding unit 7 has a transport device including a first transport belt 31. The unfinished box 2 is brought into the ready position with its bottom 21 pointing downwards and oriented horizontally. The front wall 22 of the unfinished box 2 is oriented parallel to the feeding direction, while the side wall 23 is oriented transversely to the feeding direction. The feeding direction extends transversely to the transport route 1000, on which the processing devices 100 and 200 are arranged. The ready position of the unfinished box is located adjacent to the transport belt 30 of the material feeding unit 8, which is used to feed the material blank 1.

[0028] The blank material 1 is individually glued, received by the conveyor belt 30, and moved along a linear transport path 1000. Apparatus suitable for applying adhesive to the blank material 1 is well known and is therefore not shown in the figures and will not be further elaborated upon. A robot, also not shown, receives the prepared unfinished box 2 and precisely positions it on the bottom region 11 of the coated blank material 1 in a curved placement motion 1010. The connected unit 3, consisting of the unfinished box 2 and the blank material 1 glued to its bottom 21, is then transferred to a conveyor mechanism 9 having the same transport direction 1000, which is immediately adjacent to the conveyor belt 30.

[0029] The transport belt 32 of the conveying mechanism 9 transports the box unit 3 through the processing devices 100 and 200 arranged along the transport route 1000 so as to fully leather the box unit 3. Figure 2 Elements 101, 105, and 106 of the side rolling mechanism 100 that interact with the box unit 3 are shown. For overview purposes, a second, oppositely arranged side rolling device of the same type is not shown.

[0030] The pressure roller 105, shown below the movement path of the box unit 3, is in its starting position. The pressure roller 105 is substantially cylindrical. Its axis of rotation extends parallel to the transport direction 1000 of the box unit 3. Starting from its starting position, the pressure roller 105 rolls on the side wall 23 with a vertical movement component 1004, and hereby rolls on the side wall 23 the associated outer region 13 of the blank 1.

[0031] To support the sidewall 23 against the friction roller 105 during rolling, a mating retainer 101 is provided. This mating retainer 101 is constructed from a pair of supports 102, 103. A support plate 104 is mounted between the supports 102, 103 to provide support across the entire surface. Together, they form a support surface 115 parallel to the mating box wall 23. To enable the mating retainer 101 to move circumferentially, a linear guide system is provided. A horizontally oriented linear guide 111 is arranged parallel to the transport path 1000 of the box unit 3. It houses a vertically oriented linear guide 109 in the form of a coordinate worktable. The supports 102, 103 of the mating retainer 101 are housed within the vertical linear guide 109. The vertical guide 109 is connected to a drive unit 112, enabling it to move along the horizontal guide 111. Another drive unit 110 acting on the supports 102, 103 generates a vertical motion component 1002 of the mating retainer 101. The drive unit 110 for the vertical motion component 1002 of the mating retainer 101 includes a motor-driven, vertically movable guide rail 114. This guide rail extends parallel to the transport path 1000 of the box unit 3. To transmit the vertical motion 1002 of the guide rail to the mating retainer 101, a roller 113 mounted on the support column 103 of the mating retainer moves within the guide rail 114.

[0032] When the box 3 is continuously transported in a predetermined direction 1000 via the drive belt 32, the mating retainer 101, starting from its starting position 1100 above the box unit 3, penetrates into the unprocessed box 1 during a closed-loop motion 1005 on the side wall 23. This loop motion 1005 of the mating retainer 101 takes place substantially in a plane parallel to the support surface 115 of the mating retainer. Figure 2In this process, the plane extends along the transport path 1000 in the horizontal x-direction and the vertical y-direction of the box unit 3. The circumferential motion 1005 consists of multiple segments. The activity of penetrating the box 3 begins at a starting position 1100 above the box unit 3 and terminates on the bottom 21 of the box unit inside the box unit 3, or at a position slightly above the bottom 21 of the box unit. The activity of penetrating the box can be decomposed into a vertical component 1002 and a simultaneously horizontal component 1001. The penetrating activity 1006 is basically described by a downward movement vertically relative to the box. The penetrating activity 1006 is followed by a holding segment 1007, during which the mating retainer 101 is held in a fixed position relative to the box unit 3. The mating retainer 101 moves synchronously with the box unit 3 in its transport direction 1000. During the holding segment 1007, the outer region 13 of the blank 1 is actually rubbed against the outer surface of the attached box wall 23 by the friction roller 105. The subsequent pull-out movement 1007 corresponds to the deep movement 1006 with a reverse vertical motion component 1002. Finally, the mating retainer 101 returns to its starting position 1100 with a horizontal return movement 1009.

[0033] Figure 4 The motion components 1000, 1001, 1002, and 1004 in the spatial plane are represented by a motion diagram. Figures 1 to 3 The coordinate system is related in time. Here, all the motions 1000, 1001, 1002, and 1004 are shown together in a simplified manner, consisting of linear components with different slopes. The transport motion 1000 of the box unit 3 is shown as a dotted line. It extends as a straight line climbing in the x-direction with time t.

[0034] The horizontal movement 1001 of the mating retainer 101, shown in dashed lines, is divided into a holding segment 1007 and a return movement 1009. During the holding segment 1007, the trajectory of the horizontal movement 1001 is the same as the transport movement 1000 of the box unit 3. The vertical movement component 1002 of the mating retainer 101 is shown in solid lines. The simultaneous abrupt change in slope of the vertical movement component 1002 of the mating retainer 101, along with the horizontal movement component 1001, indicates its starting position 1100. The holding segment 1007 is determined by the final lower position of the vertical movement 1002. Figure 4 It is clear that the segments of the horizontal movement 1001 synchronized with the transport movement 1000 in time include the movement segments of the inward movement 1006, the holding segment 1007, and the pulling-out segment 1008.

[0035] Also shown in solid lines is the vertical motion component 1004 of the friction roller 105. Friction occurs during the upward movement. This friction occurs simultaneously with the holding section 1007 of the mating retainer 101. The horizontal motion component of the friction roller 105 causes a tumbling motion on the box unit 3 that is only perpendicular to the bottom 21. The relative movement of the friction roller 105 to the box 3 is prevented. The horizontal motion component of the friction roller 105 is not shown, but it is simply the same as the horizontal motion component of the mating retainer.

[0036] Figure 4 The motion diagram schematically simplifies the motion trajectory. A curved transition can be chosen instead of abrupt slope changes. This can particularly benefit machine dynamics. Furthermore, the motion segments and components shown can be delayed or overlapped relative to each other. This can further reduce the load on machine dynamics and improve process time. These adaptive adjustments can be optimized in relation to the dimensions of the box 2 or the blank 1.

[0037] List of reference numerals

[0038] 1. Material blank

[0039] 2 Unprocessed boxes

[0040] 3-part leather-lined box

[0041] 4. Boxes of finished products

[0042] 5. Adhesive materials

[0043] 7 Raw box feeding section

[0044] 8 Material supply department

[0045] 9 boxes of shipping department

[0046] 11 bottom area

[0047] 12. External Area (Front Wall)

[0048] 13. External area (sidewalls)

[0049] 14 Side connectors (left)

[0050] 15. Side connector (right)

[0051] 16. Fold-over section (front wall)

[0052] 17. Fold-over section (side wall)

[0053] 18 Adhesive side

[0054] 19 Outer side

[0055] 21st end

[0056] 22 Anterior wall

[0057] 23 Sidewalls

[0058] 30 conveyor belts

[0059] 31 First transport belt (box supply section)

[0060] 32 Second transport belt (box with leather section)

[0061] 100 Side Rolling Device (Left Side Wall)

[0062] 101 Pairing Holder (left)

[0063] 102. Pillar (Rear Left)

[0064] 103 Pillar (Front Left)

[0065] 104 Support Plate

[0066] 105 Grinding Mill (Left)

[0067] 106 Folding Track (Left)

[0068] 107 Grinding tool (front left)

[0069] 108 Grinding Mill (Rear Left)

[0070] 109 Linear Guide (Vertical)

[0071] 110 Drive unit, vertical stroke

[0072] 111 Linear Guide Section (Horizontal)

[0073] 112 Drive unit, horizontal stroke

[0074] 113 rollers

[0075] 114 orbits, which are curves under certain conditions.

[0076] 115 Support surface (pairing retainer)

[0077] 200 Connector Friction Press Device

[0078] 1000 Transportation Routes (Boxes)

[0079] 1001 Motion component of the horizontal (x) direction of the paired retainer

[0080] 1002 Vertical (y) motion component of the mating retainer

[0081] 1003 Lateral (z) motion component of the mating retainer

[0082] 1004 Vertical (y) motion component of the friction press

[0083] Circular motion of 1005 mating retainer

[0084] 1006 In-depth activity of the mating retainer

[0085] 1007 Holding section of the mating retainer

[0086] 1008 Pull-out section of mating retainer

[0087] 1009 Return motion of the mating retainer

[0088] 1010 Placement movement of unprocessed boxes

[0089] 1100 Starting position of the mating retainer

Claims

1. A method for covering boxes (2, 3) to be covered by means of at least one substantially flexible covering material (1) by adhesive bonding in a box gluing machine, wherein • the boxes to be covered (2, 3) each have at least one substantially flat bottom (21) and a plurality of substantially flat walls (22, 23) each connected to the at least one bottom (21) and arranged substantially orthogonally to the bottom, the walls having at least one externally located bonding surface, • the at least one covering material (1) each consists of at least one material sheet and has at least one bonding surface (18), • at least one externally located bonding surface of the at least one bottom (21) of the box to be covered and / or at least one externally located bonding surface of the at least one wall (22, 23) of the box to be covered is adhesively bonded to at least one bonding surface (18) of the at least one covering material (1), • the box gluing machine comprises a plurality of processing stations, and the boxes to be covered (2, 3) each successively pass through the plurality of processing stations in succession, wherein • the boxes to be covered (2, 3) are transported substantially between the processing stations in a plane substantially parallel to the at least one bottom (21) of the boxes to be covered (2, 3), • at least one of the processing stations comprises at least one pressure device (100, 200), • the at least one pressure device (100) has at least one pressure roller (105) and at least one counter holder (101) corresponding to the at least one pressure roller (105), • the at least one counter holder (101) of the pressure device (100) penetrates into the box to be covered (2, 3) and contacts the inner surface of the wall to be covered (22, 23), • the at least one pressure roller (105) of the pressure device (100) is moved onto the outside of the at least one wall to be covered (22, 23) in a pressure movement (1004), wherein • the pressure movement (1004) of the at least one pressure roller (105) of the at least one pressure device (100) starts on or near the edge of the already bonded surface, and the pressure roller (105) substantially brushes over the surface to be covered during the pressure movement (1004), • the pressure movement (1004) of the at least one pressure roller (105) of the at least one pressure device (100) is carried out substantially during the contact of the at least one counter holder (101) of the at least one pressure device (100) corresponding to the at least one pressure roller (105) with the inner surface of the wall to be covered (22, 23), characterized in that the pressure on the at least one bonding surface is carried out by means of the at least one pressure device (100) during the continuous and substantially parallel transport movement (1000) of the box to be covered (2, 3) to the at least one bottom (21) of the box to be covered (2, 3). wherein the movement (1005) of the at least one counter-holder (101) of the at least one calendering device (100) consists at least of a first movement component (1002) and a second movement component (1001), wherein the at least one first movement component (1002) takes place essentially parallel to the surface normal of the bottom (21) of the box (2, 3) to be covered, and the at least one second movement component (1001) is orthogonal to the at least one first movement component (1002) and takes place essentially parallel to the transport direction of the box (2, 3) to be covered during calendering.

2. The method of claim 1, wherein, The second movement component (1001) of the at least one counter-holder (101) is at least sometimes essentially identical to the continuous transport movement (1000) of the box (2, 3) to be covered both in terms of its direction and in terms of its length.

3. The method according to claim 1 or 2, characterized in that, The at least one calender (105) moves in a closed loop, and the at least one counter- holder (101) corresponding to the at least one calender (105) moves (1005) in a closed loop.

4. The method according to claim 1 or 2, characterized in that, The bottom (21) of the box (2, 3) to be covered is oriented essentially horizontally at least during the calendering movement (1004) of the at least one calender (105) of the at least one side calendering device (100).

5. The method of claim 3, wherein, The bottom (21) of the box (2, 3) to be covered is oriented essentially horizontally at least during the calendering movement (1004) of the at least one calender (105) of the at least one side calendering device (100).

6. A device for covering a box (2, 3) to be covered by means of at least one substantially flexible covering material (1) by means of adhesive bonding, wherein The box (2, 3) to be covered has at least one essentially flat bottom (21) and a plurality of essentially flat walls (22, 23) connected to the at least one bottom (21) and arranged essentially orthogonally to the bottom, the walls having at least one externally located joint surface, the at least one covering material (1) consisting of at least one material paper, respectively, and having at least one joint surface (18), the at least one externally located joint surface of the at least one bottom (21) of the box to be covered and / or the at least one externally located joint surface of the at least one wall (22, 23) of the box to be covered being adhesively joined to the at least one joint surface (18) of the at least one covering material (1), the device having at least • a transport device (9) with at least one transport element (32) holding the box (2, 3) to be covered in a conveying effect and moving along a transport path (1000) essentially parallel to the at least one bottom (21) of the box (2, 3) to be covered, • a calendering device (100) arranged on the at least one transport path (1000), the calendering device having at least a movable calender (105) and a movable counter- holder (101) corresponding to the at least one calender (105), • a calendering device (100) arranged on the at least one transport path (1000), the calendering device having at least a movable calender (105) and a movable counter- holder (101) corresponding to the at least one calender (105), • a first guiding system connected to the at least one movable calendering device (105) and a second guiding system (109, 111) connected to the at least one movable counter holder, wherein the at least one first guiding system determines the movement path of the at least one calendering device (105) and the at least one second guiding system (109, 111) determines the movement path of the at least one counter holder (101), characterized in that the movement path of the at least one counter holder (101) determined by the at least one second guiding system (109, 111) has at least one movement section (1007, 1009), wherein the at least one movement section (1007, 1009) is essentially linear and is oriented essentially parallel to the transport path (1000), wherein the movement (1005) of the at least one movable counter holder (101) of the calendering device (100) 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) is essentially parallel to the surface normal of the bottom (21) of the box (2, 3) to be covered and the at least one second movement component (1001) is orthogonal to the at least one first movement component (1002) and is essentially parallel to the transport direction of the box (2, 3) to be covered during calendering.

7. The apparatus of claim 6, wherein, The at least one counter holder (101) has two linear guides which are essentially orthogonal to each other, wherein at least one first linear guide is oriented essentially parallel to the at least one transport path (1000) of the box (2, 3) to be covered.

8. The apparatus of claim 6, wherein, The at least one counter holder has at least one curved guide, wherein the at least one curved guide predefines at least one linear or essentially linear movement section (1007) of the at least one counter holder (101).

9. The apparatus of any one of claims 6-8, wherein, The counter holder (101) comprises at least two strips (102, 103) which are connected to each other, wherein the at least two strips (102, 103) are at least sometimes and locally arranged in the working area of the at least one calendering device (105) corresponding to the counter holder (101) and the strips are variable in their mutual spacing, so that they jointly support at least one area of the respectively assigned wall (22, 23) of the box (2, 3) to be covered against the corresponding calendering device (105).

10. The apparatus of claim 9, wherein, Said at least one counter-holder (101) has at least one support plate (104), wherein said at least one support plate (104) is arranged between said at least two strips (102, 103) of said at least one counter-holder (101) and is at least sometimes and locally arranged in the working area of the corresponding rubbing block (105) corresponding to said at least one counter-holder (101), so that it, together with said at least two strips (102, 103) of said at least one counter-holder (101), supports at least one area of the respective associated wall (22, 23) of said box (2, 3) to be skinned against said corresponding rubbing block (105).

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