Corner studs for the production of packaging boxes

Abstract

Corner studs (1), with a longitudinal edge (c) and two adjacent corner stud cross-sectional outer edges (a; b), for connecting side walls (5) of a packaging box, comprising • two rectangular grooves (2) extending in the direction of the longitudinal edge (c) of the corner stud, each with a groove axis (3) along the groove depth, which is perpendicular to the longitudinal edge (c) of the corner stud (1), wherein both groove axes (3) span an angle α of 30° to 150° to each other, - wherein the distance of the grooves (2) from the nearest outer edge (a; b) of the corner stud cross-section is at least 5 mm, and - the distance (4c) between the two opposing, internal corner edges (4a; 4b) of the two grooves (2) is between 3 and 10 mm, and - the groove depth of the two grooves (2) is 5-20 mm each, and - with a ratio of groove depth to the length of the adjacent corner stud cross-section outer edges (a; b) of 5 / 45 to 20 / 45.

Description

[0001] The invention relates to the manufacture of boxes for packaging goods using a corner stud provided for connecting the side walls in the corners between edges.

[0002] In current technology, packaging boxes for heavy or bulky items can only be nailed or screwed together, which necessitates relatively thick side walls or reinforcement through structural elements such as strips. A disadvantage of this method is the considerable weight of the packaging boxes. Furthermore, metal remnants remain in the packaging waste. Alternatively, simply gluing the side walls without additional structural reinforcements offers insufficient stability.

[0003] DE 29 00 348 A1 discloses a container with a bottom and side walls which are folded upwards from the bottom and are held together at their ends by extruded profiles as corner posts, forming the container corners.

[0004] DE 85 26 838 U1 describes a demountable container which has a floor, a roof and side walls, and optionally also a loading and unloading opening which can be closed by means of a flexible cover instead of one of the side walls.

[0005] DE 203 17 128 U1 discloses a small animal box, in particular for the rearing or exhibition of birds, with a body which has a viewing grid or viewing window on the front and otherwise consists of panels which serve as the floor, side walls, back wall, front panel and roof of the small animal box.

[0006] The object of the invention is to provide a solution that overcomes the disadvantages of the prior art. It should enable the production of stable packaging boxes. The invention should allow for the glue-free production of packaging boxes. The boxes should be lightweight. Ideally, cardboard should be used as the material for the side walls of the packaging box to create stable packaging boxes.

[0007] The boxes should be lightweight, yet highly stable.

[0008] They should be easy to manufacture and easy to use. Metal residues in packaging waste should be reduced.

[0009] Suitability for disposable packaging for heavy machinery and machine parts should be ensured as far as possible.

[0010] According to the invention, the problem is solved by the features of the independent main claims. Advantageous embodiments of the invention are specified in the dependent dependent claims.

[0011] The invention relates to a corner stud, comprising a longitudinal edge and two adjacent corner stud cross-sectional outer edges (the stud thus has three dimensions in spatial terms: longitudinal edge, first corner stud cross-sectional outer edge and second corner stud cross-sectional outer edge; here the two corner stud cross-sectional outer edges are perpendicular to the longitudinal edge, as is the case with a cross-sectional surface), for connecting side walls of a packaging box, comprising • Two rectangular grooves running along the direction of the longitudinal edge (i.e., the length; i.e., parallel to the longitudinal edge) of the corner stud, each with a groove axis along the groove depth, which is perpendicular to the longitudinal edge of the corner stud, wherein both groove axes form an angle α of 30° to 150° with each other, - wherein the distance of the grooves from the nearest outer edge of the corner stud cross-section is at least 5 mm, and - the distance between the two opposing, inner corner edges of the two grooves is between 3 and 10 mm, and - the groove depth of both grooves is between 5 and 20 mm, and - with a ratio of groove depth to the length of the adjacent corner stud cross-section outer edges of 5 / 45 to 20 / 45.

[0012] The two adjacent outer edges of the corner tunnel cross-section are both perpendicular to the longitudinal edge.

[0013] The corner tunnel sensibly has the same cross-section at all positions along the longitudinal direction, i.e. along the longitudinal edge of the corner tunnel.

[0014] Suitable materials for the "side walls" of a packaging box include, for example, high-pressure laminate (HPL) panels, plastic panels (such as PVC or acrylic sheets), OSB or plywood panels, or sandwich panels with a foam core. There are no restrictions regarding the materials used for the side walls.

[0015] A "groove" within the meaning of the invention is an elongated depression or milled recess having a groove axis. These grooves project into the corner stud but do not pierce it. Each groove has a width (perpendicular to the longitudinal edge of the corner stud), with two corner edges of the groove located at its inner end, one of which is closer to the center of the corner stud and the other further from the center.

[0016] The "mutually facing, internal corner edges" of the two grooves refer to a pair of two corner edges (in the longitudinal direction, i.e., parallel to the longitudinal axis of the corner stud), one of which belongs to the first groove and the other to the second groove. Each pair is formed from the two of the four corner edges that are closest to each other.

[0017] The “rectangular grooves” run (in the sense of a longitudinal milling) along the length of the corner stud and serve to insert the side walls of the packaging box into this groove.

[0018] "Length of the corner tunnel" is therefore the direction of the longitudinal edge of the corner tunnel.

[0019] The groove axis thus has a "groove depth" (in the sense of milling the groove), which could also be described as the penetration depth. The groove axis therefore runs along the groove depth. Both groove axes lie together in a plane that corresponds to the cross-section of the corner lug. The outer edges of the corner lug's cross-section also lie in this plane. The corner edges of the first and second grooves, however, are perpendicular to this cross-sectional plane; they run parallel to the longitudinal edge of the corner lug.

[0020] The "groove depth" within the meaning of the invention is the depth of the groove starting from an imaginary outer edge perpendicular to the outer edge of the corner stud cross-section (reference numeral a or b) – when considering the cross-section of the corner stud. This also applies in the case of a corner stud cross-section diagonal outer edge intersecting the cross-section (see reference numeral d, for example, in [reference numeral d]). Fig. 10 / left) the groove depth is determined at an imaginary outer edge, perpendicular to a or b (reference symbol in Fig. 10 / left) as the distance between this imaginary outer edge and the inside of the groove. In the two different versions in Fig. Therefore, the depth of the grooves is the same for 10.

[0021] From the feature according to the invention of this distance (between the two opposing, inner corner edges of the two grooves) of at least 3 mm, the maximum groove depth (depth of the groove) can be derived (by simple considerations). Several factors influence this distance: the depth of the groove, the distance of the groove from the respective nearest outer edge of the corner stud, and the angle α. A person skilled in the art can determine by simple calculation which combination results in such a distance of at least 3 mm.

[0022] The two adjacent outer edges of the corner studs also form an angle, which can have the same value as angle α (in which case the outer edges of the corner studs would be parallel to one of the groove axes), or a different value, such as 90°. The two adjacent outer edges of the corner studs are continuous and not interrupted by the grooves; that is, the two longest edges on the corner stud (in cross-section) are the outer edges of the corner studs. However, these are not the longitudinal edges of the corner stud, but rather edges of the cross-section.

[0023] The invention further relates to a packaging box comprising at least three of the corner studs according to the invention and side walls arranged between these corner studs.

[0024] The invention also relates to a method for producing the corner stub according to the invention, wherein the angle between the two adjacent corner stub cross-sectional outer edges is 90° ±10%, preferably 90°, comprising the steps: - Milling two rectangular grooves (each with a groove axis along the groove depth) into a rectangular bar along the length of the rectangular bar (relating to the milling), wherein both groove axes are perpendicular to the longitudinal edge of the rectangular bar, and wherein both groove axes form an angle α of 30° to 150° with each other, with a distance between the two opposing, inner corner edges of the two grooves of at least 3 mm, for example with a pin cutter, to maintain the corner stud according to the invention.

[0025] The subject matter also includes a method for manufacturing the corner stud according to the invention in a preferred embodiment in which it is made of extrudable plastic, comprising the step: - Extrusion of the corner stud in the direction of its longitudinal edge.

[0026] The penultimate subject matter of the invention is a method for manufacturing a packaging box, comprising the steps of: a) Providing at least three corner studs according to the invention (preferably identical), b) Applying an adhesive along all grooves (for example, as adhesive dots spaced 5-20cm apart or continuously), and c) Inserting side walls into the grooves. It makes sense to include at least one bottom panel.

[0027] Finally, the invention also relates to the use of the corner stud according to the invention for the manufacture of packaging boxes; in particular the packaging boxes according to the invention or in the method according to the invention.

[0028] Statements relating to the corner stud according to the invention also apply to all methods and uses according to the invention and vice versa. Advantages

[0029] The advantage of the invention is that, for the first time, the use of adhesives can be eliminated in the production of packaging boxes. The invention allows for the adhesive-free production of a packaging box, particularly with materials (for the side walls of such a box) such as high-pressure laminate (HPL) panels, plastic panels (for example, PVC panels or acrylic glass panels), or sandwich panels with a foamed core.

[0030] The invention allows for a lighter weight compared to conventional boxes made of solid wood or plywood, while maintaining the same load-bearing capacity, lid load capacity, and stackability.

[0031] It is possible to manufacture packaging boxes with thin side walls and sturdy corner joints that do not require nails or screws as fasteners. In contrast, conventional packaging boxes use nails or screws for corner joints, which necessitates thicker side walls.

[0032] The corner studs even allow the use of materials as light as cardboard.

[0033] Advantageously, the corner stud according to the invention is constructed in one piece and is therefore stable, provides support itself and, above all, is easy to manufacture and easy to use.

[0034] Another advantage is that the corner stud according to the invention can be manufactured from bar stock, namely corner profile bars. It is therefore easy to produce and cost-effective.

[0035] Furthermore, no nail remnants remain in the packaging waste.

[0036] The corner stud according to the invention is suitable, for example, for disposable packaging for heavy machine parts. Preferred embodiments

[0037] Preferably the distance (between the two opposing, inner corner edges) is at least 5mm.

[0038] Preferably, the corner stud is made from a square profile bar. This design results in a corner stud with two adjacent outer edges a and b that are perpendicular to each other and of equal length.

[0039] Preferably, the two adjacent corner stud cross-section outer edges each have a length of 40-50mm, preferably if the corner stud is made of WPC (wood-plastic composite, i.e., an extrudable plastic).

[0040] In a preferred embodiment, the angle α is between 45° and 135°, particularly preferably between 80° and 100°, or even between 90°.

[0041] In another preferred embodiment of the invention, the two adjacent outer edges of the corner stud cross-section are at an angle to each other corresponding to angle α. This embodiment, with grooves running parallel to these outer edges of the corner stud cross-section, is advantageous because it saves material and eliminates any sloping surfaces on the outside of a packaging box manufactured in this way.

[0042] Another preferred embodiment is in which both adjacent outer edges of the corner stud cross-section are of equal length, and the longitudinal edge is at least as long as one outer edge of the corner stud cross-section. Advantageously, such a square cross-sectional profile can be easily manufactured from meter-long material. Particularly preferred is the longitudinal edge being equal to the outer edges of both corner stud cross-sections, so that the corner stud essentially has a cube shape (with or without a diagonal outer edge, as described below), or it is longer. In the cube shape, for example, such a cube could be attached to each corner of a packaging box (i.e., at 8 corners). In a longer embodiment of the corner stud, it can be attached along the vertical side edges of a packaging box, ideally along the entire height of the packaging box, with a total of four such elongated corner studs.

[0043] In one embodiment, which (like all other embodiments) can be combined in various combinations with other embodiments: - the distance of the grooves from the respective nearest outer edge of the corner stud (viewed in cross-section of the corner stud) is 5-10 mm, particularly preferably 9 mm ± 1 mm, and / or - the distance between the two opposing, inner corner edges of the two grooves is particularly preferably 3-5 mm, or 3-3.5 mm, and / or - are the two adjacent outer edges of the corner stud cross-section each 45mm ±5mm long, and / or - the width of the two grooves (viewed in cross-section of the corner stud) is 2-10mm each (2-6mm or even 3-4mm are particularly preferred, but a version with thicker side walls is also possible, in which the width of the grooves is 9-10mm).

[0044] According to the invention, the groove depth of both grooves is 5-20mm.

[0045] The width of the rectangular grooves corresponds to the distance between the two corner edges of the grooves.

[0046] In a further preferred embodiment of the invention, the angle between the two adjacent corner stud cross-sectional outer edges is 90° ±10%, particularly preferably at 90°, so that they could be perpendicular to each other.

[0047] In a preferred embodiment of the invention, the corner tunnel according to the invention comprises a corner tunnel cross-section diagonal outer edge which diagonally intersects (and delimits) the corner tunnel cross-section, leaving at least the two corner tunnel cross-section outer edges uncut. The cut need not run centrally through, for example, a square, right-angled profile of the corner tunnel, but can also be made at an offset position, as shown by way of example in Fig. 10 / right.

[0048] Even afterwards, the corner tunnel clearly has the same cross-section at all points.

[0049] A combination of these two embodiments is particularly preferred, i.e., a rectangular cross-sectional profile which has been cut diagonally, as exemplified in Fig. 10 or Fig. 3 shown.

[0050] In a further preferred embodiment of the invention, both grooves have a toothed profile with fastening projections on at least 50% of the inner surface of both (opposite) grooves. These projections are selected from teeth, lamellae, and radii (such as hemispheres) pointing inwards. This embodiment is particularly well suited for the glue-free production of a packaging box, as the side panels, which are inserted into the grooves, are held firmly in place by the fastening projections. The toothed profile with fastening projections is preferably made of the same material as the corner stud itself.

[0051] In the case of a corner stud made of extrudable plastic, these fastening projections can easily be extruded with the corner stud and are then integrally connected to the corner stud.

[0052] Alternatively, the corner stud according to the invention can also include: two dowels that can be inserted into the grooves, which have a rectangular longitudinal cross-sectional shape (i.e., a U-shape that fits into the grooves) and which, on the two opposing surfaces (i.e., the sides of the profile in the longitudinal cross-section), have a toothed profile with fastening projections, selected from teeth, lamellae, and radii, extending over at least 50% of the surface area. "External" means that the fastening projections exert force into the interior of the groove of the corner stud during assembly of the packaging box.

[0053] The dowel is thus a kind of rectangular U-shaped rail, which is pushed onto the side walls of a packaging box and then or beforehand inserted into the grooves.

[0054] The surfaces of the dowel (the cheeks) are made of a thin material, 0.2 to 2 mm thick, preferably 0.8 to 1.2 mm thick, and particularly also approximately 1 mm ±5%. The fastening projections are preferably made of plastic, aluminum, or polyethylene (PE).

[0055] These dowels, because they have a U-shape and therefore resemble a U-shaped rail, can also be extruded as meter-long stock, or, if they are made of wood, for example, milled.

[0056] Alternatively, it is also possible that the fastening protrusions on the dowel protrude inwards and thus press against the side walls when the packaging boxes are assembled.

[0057] However, one version of this dowel design does not require such a toothed profile. For example, in another version, such a dowel consists of an adhesive which activates its bonding properties when the end is inserted into the groove, and has no fastening projections.

[0058] “At least 50%” means that complete coverage of the respective area with fastening protrusions is also possible.

[0059] The dowel designs described here can have, for example, the following dimensions: length of the two opposing surfaces (cheeks) 20mm±10%, or length of the end face (inner length) 9mm±10%, or width of the dowel (i.e., outer length of the end face) 10.4mm±10%, or material thickness 0.7mm±10%.

[0060] It is in accordance with the invention if, in the corner stud according to the invention, the ratio of the groove depth to the adjacent corner stud's outer cross-sectional edge (i.e., the length of the corner stud's outer cross-sectional edge that is closest to the respective groove) is between 5 / 45 and 20 / 45. This ratio has proven to be the most stable for packaging boxes with adhesive bonding that does not require nails or screws.

[0061] In a preferred embodiment of the invention, the material of the corner stud is selected from iron, aluminum, wood-plastic composite (WPC), and wood. Aluminum and WPC are among these materials that are easy to extrude. WPC can, for example, have a filling of 70% wood (such as spruce or beech) and 30% plastic.

[0062] In a preferred embodiment of the packaging box according to the invention, the longitudinal edge of the corner stud according to the invention corresponds to the outer height of the packaging box. It is then clearly an elongated corner stud which, due to its single-piece construction, gives the box particular stability, especially stability against the compression of the side walls when the packaging boxes are stacked, i.e., force from above.

[0063] In a preferred embodiment of the packaging box, the side walls are made of a material selected from cardboard, wood-based materials, laminated panels, fiberboard, plastic panels, and sandwich panels with a foamed core. Examples of wood-based materials include: solid wood panels, plywood, particleboard, OSB, and fiberboard (MDF, HDF); cardboard, for example: corrugated cardboard or honeycomb panels; mineral-bonded panels, for example: gypsum-bonded fiberboard and cement-bonded particleboard; and sandwich panels, for example: with a foamed core, optionally also laminated with a thin layer of aluminum or a layer of plywood. This means they are essentially made of this material, in particular at least 80% by weight, preferably at least 95%. These materials are advantageously suited for constructing particularly lightweight packaging boxes using the corner studs according to the invention.

[0064] It is also preferred if the packaging boxes according to the invention comprise a box base which has a recess in each corner area the size of the corner stud projecting into the interior of the packaging. Advantageously, to prevent the box base from sliding freely up and down, the box base is held in place by slots in the side walls and clamped in place by them. The slots can be continuous (i.e., completely cutting through the side walls and having a gap) or can simply be notches in the side walls. Such an embodiment is described in Fig. Figure 11 is sketched. The weight of the floor then rests on the side walls.

[0065] In a preferred embodiment of the inventive method for producing the corner stub (in the variant in which the angle between the two adjacent corner stub cross-sectional outer edges is 90° ±10% and with the milling step), the method comprises the additional step - as a step preceding milling: sawing a rectangular bar along the diagonal of the rectangular profile (and parallel to the longitudinal edge of the rectangular bar) or along a parallel to this diagonal (also parallel to the longitudinal edge of the rectangular bar), to obtain two parts, so that the subsequent milling takes place on the larger or the equally sized of the two parts, or - as a step following milling: sawing the corner tunnel obtained during milling along the diagonal of the corner tunnel cross-section (and parallel to the longitudinal edge of the corner tunnel) or along a parallel to this diagonal (and parallel to the longitudinal edge of the corner tunnel).

[0066] In a preferred embodiment of the invention, the grooves are milled by milling the groove (for example, in solid wood, e.g., on a table router or on a tenon joiner) and then profile milling with a pin cutter (profile cutter for routers or CNC machines). The tooth profile with the fastening projections mentioned above can also be milled (as a profile in the groove).

[0067] For the realization of the invention, it is also advantageous to combine the aforementioned inventive configurations, embodiments and features of the claims.

[0068] The invention will now be explained in more detail using several exemplary embodiments. These examples should describe the invention without limiting its scope. Fig. 1 to Fig. Figure 4 shows various preferred embodiments of the corner tunnel (1) in a cross-sectional view, with or without a corner tunnel cross-section diagonal outer edge (d). Regarding this diagonal outer edge, Fig. 10 (left and right) two different preferred arrangements. Fig. Figure 5 shows (in sketch form) a preferred manufacturing variant of the corner stud in a version made from a square bar by means of the two steps "sawing the bar along a diagonal" and subsequent "milling of two rectangular grooves". This yields a corner stud of the type shown. Fig. 10 / left; in particular, this makes it possible to obtain two long corner studs from a square bar. Fig. Figure 6 shows the use of a preferred design of the corner stud in a standard transport crate, in a top view. It is evident that there is a corner stud in each corner of the crate, either the length of the crate's height or, for example, in a cube shape. Fig. Figure 7 shows in part the parts of the corner stud according to the invention in a preferred embodiment, wherein the groove axes (3) of the two grooves (2) have each been indicated by dashed lines. In Fig. 8 The distance (4c) between the two mutually facing corner points (4a; 4b) of the two grooves is indicated by a dashed line. Fig. Figure 9 shows the use of the corner stud in an elongated embodiment for connecting side walls of a packaging box (oblique top view of the packaging box), wherein an axis along the longitudinal edge (c) of the corner stud (1) is marked and the two groove axes (3; 3) perpendicular to it are also marked. Fig. Figure 10 shows (left and right) two different embodiments with the same depth of the groove (in accordance with the invention). Fig. Figure 11 shows a design of a packaging box (in side view) in which the box base has recesses in the area of ​​the corner stud, but is not freely movable up and down, but is held in place by continuous slots in the four side walls and clamped by them. The weight of the base is clearly resting on the side walls. Fig. Figure 12 shows various embodiments of a dowel described in a preferred embodiment, which can be inserted into the grooves and has a rectangular longitudinal cross-sectional shape. Various types of fastening projections are also shown. Examples of implementation

[0069] The following four examples show corner studs made of extruded WPC plastic.

[0070] Example 1 ( Fig. 1): made of WPC plastic, with rectangular cross-section, with tooth profile. Example 2 ( Fig. 2): made of WPC plastic, with a rectangular cross-section, without a tooth profile

[0071] Example 3 ( Fig. 3): made of WPC plastic, with diagonal outer edge (d), with tooth profile, embodiment 4 ( Fig. 4): made of WPC plastic, with diagonal outer edge (d), without tooth profile

[0072] Regarding the two embodiments 3 and 4 from the Fig. 3 and Fig. 4 shows Fig. 5. A possible way to manufacture the profile from a square rod is shown in outline.

[0073] In particular, the four embodiments 1-4 made of WPC plastic can also be easily manufactured by means of extrusion.

[0074] Example of implementation No. 6: Box with corner studs according to Fig. 6 or Fig. 3

[0075] Example No. 10: Fig. 10 / left

[0076] Fig. 10 / left shows one of the Fig. 4 similar versions of the corner stud, but with a differently positioned diagonal outer edge (d). Reference sign 1 corner stud 2 grooves (elongated, with one groove axis) 3. Slot axis (of the slot) 4a Corner edge of the first groove (the one closest to the second groove) 4b Corner edge of the second groove (the one closest to the first groove) 4c distance (between the two opposing, inner corner edges) a, b Corner stud cross-section outer edges (continuous, i.e. without groove) c Longitudinal edge (of the corner stud) d Corner stud cross-section diagonal outer edge 5 side panels (of a packaging box) 6 crate bottoms (of one packaging crate)

Claims

[1] Corner studs (1), with a longitudinal edge (c) and two adjacent corner stud cross-sectional outer edges (a; b), for connecting side walls (5) of a packaging box, comprising • two rectangular grooves (2) extending in the direction of the longitudinal edge (c) of the corner stud, each with a groove axis (3) along the groove depth, which is perpendicular to the longitudinal edge (c) of the corner stud (1), wherein both groove axes (3) span an angle α of 30° to 150° to each other, - wherein the distance of the grooves (2) from the nearest outer edge (a; b) of the corner stud cross-section is at least 5 mm, and - the distance (4c) between the two opposing, internal corner edges (4a; 4b) of the two grooves (2) is between 3 and 10 mm, and - the groove depth of the two grooves (2) is 5-20 mm each, and - with a ratio of groove depth to the length of the adjacent corner stud cross-section outer edges (a; b) of 5 / 45 to 20 / 45. [2] Corner tunnel according to claim 1, wherein the two adjacent corner tunnel cross-sectional outer edges (a; b) are at an angle to each other corresponding to the angle α. [3] Corner tunnel according to one of claims 1 or 2, wherein both adjacent corner tunnel cross-sectional outer edges (a; b) are of equal length and wherein the longitudinal edge (c) is at least as long as a corner tunnel cross-sectional outer edge (a; b). [4] Corner studs according to one of claims 1 to 3 - where - the two adjacent corner stud cross-section outer edges (a; b) are each 45mm ±5mm long, and / or -the width of both grooves is 2-10mm each. [5] Corner tunnel according to any one of claims 1 to 4, wherein the angle between the two adjacent corner tunnel cross-sectional outer edges (a; b) is 90° ±10%. [6] Corner tunnel according to claim 5, with a corner tunnel cross-section diagonal outer edge (d) which cuts the corner tunnel cross-section diagonally. [7] Corner studs according to one of claims 1 to 6, wherein both grooves (2) have a tooth profile with fastening projections, selected from teeth, lamellae and radii, on at least 50% of the inner surface of the grooves on both opposing inner surfaces, or wherein two dowels that can be inserted into the grooves (2) are included, which have a rectangular longitudinal cross-sectional shape and have such a tooth profile with fastening projections, selected from teeth, lamellae and radii, on the outside of at least 50% of the surface of the two opposing surfaces. [8] Corner stud according to any one of claims 1 to 7, wherein it is made of a material selected from iron, aluminium, wood-plastic composite WPC and wood. [9] Packaging box comprising at least three of the corner studs (1) according to any one of claims 1 to 8 and side walls (5) arranged between these corner studs. [10] Packaging box according to claim 9, wherein the longitudinal edge (c) of the corner stud (1) corresponds to the outer height of the packaging box. [11] Packaging box according to one of claims 9 to 10, wherein the side walls (5) are made of a material selected from cardboard, wood-based materials, laminated panels, fiberboard, plastic panels and sandwich panels with a foamed core. [12] Packaging box according to one of claims 9 to 11, wherein the packaging box comprises a box base (6) which has a recess in the respective corner area in the size of the corner stud (1) projecting into the interior of the packaging. [13] Method for producing a corner tunnel (1) according to any one of claims 1 to 8, wherein the angle between the two adjacent corner tunnel cross-sectional outer edges (a; b) is 90° ±10%, comprising the step: - Milling two rectangular grooves (2), each with a groove axis (3) along the groove depth, into a rectangular bar along the length of the rectangular bar, wherein both groove axes (3) are perpendicular to the longitudinal edge (c) of the rectangular bar, and wherein both groove axes (3) form an angle α of 30° to 150° with each other, with a distance (4c) between the two mutually facing, internal corner edges (4a; 4b) of the two grooves (2) of at least 3 mm. [14] The method of claim 13 with the additional step: - as a step preceding milling: sawing a rectangular bar along the diagonal of the rectangular profile or along a parallel to this diagonal, to obtain two parts, so that the subsequent milling takes place on the larger or the equally sized of the two parts, or - as a step following milling: sawing the corner tunnel obtained during milling along the diagonal of the corner tunnel cross-section or along a parallel to this diagonal. [15] Method for producing a corner stud according to any one of claims 1 to 8 wherein the corner stud is made of extrudable plastic, comprising the step: - Extrusion of the corner stud (1) in the direction of its longitudinal edge (c). [16] Method for manufacturing a packaging box, comprising the steps: a) Providing at least three corner studs (1) according to any one of claims 1 to 8, b) Applying an adhesive along all grooves (2), and c) Inserting side walls (5) into the grooves. [17] Use of the corner stud according to any one of claims 1 to 8 for the manufacture of packaging boxes.

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