A folding corner for packaging protection and a method of making the same

Abstract

The application relates to the technical field of packaging box protection, and discloses a foldable corner guard for packaging box protection, which comprises a flexible surface layer and first and second hard protection layers connected with the flexible surface layer. The foldable corner guard for packaging box protection is connected with the first and second hard protection layers and the flexible surface layer, at least one of the first and second hard protection layers and the flexible surface layer is connected with a box, the above connection mode can randomly adjust the angle of the corner guard, and can be adapted to the edges and corners of various packaging boxes.

Description

Technical Field

[0001] This invention relates to the field of packaging box protection technology, specifically to a method for preparing a folding corner protector machine for packaging protection. Background Technology

[0002] Corner protectors, characterized by their low price, light weight, sturdiness, and compliance with environmental protection requirements, are also known as corner wraps, corner plates, edge plates, corners, or angle steel. They are an ideal new type of green packaging material. Corner protectors are made by laminating multiple layers of cowhide and then shaping and pressing them using a corner protector machine. They are mainly available in L-shape and U-shape. When used for stacking goods, they can strengthen the edge support of the packaging and protect its overall packaging strength. They can replace wood and are 100% recyclable.

[0003] Placing corner protectors at the four corners of a packaging box enhances its stacking strength, cushions impacts, and allows boxes to be stacked together without crushing the contents. Because corner protectors significantly reduce damage to goods during transport, they are considered an ideal packaging product that helps enhance the product's external image. Corner protectors have a wide range of applications depending on the mode of transport and environmental conditions.

[0004] In the existing technology, L-shaped corner protectors are non-foldable L-shaped corner protectors made of rigid board. The fixed angle design means that the packaging box must be folded before they can be installed. The existing corner protectors are rigid angles and are not suitable for other angles. They are okay if the angle difference is not large, but if the angle difference is too large, they cannot be assembled. Summary of the Invention

[0005] This invention provides a foldable corner protector for packaging box protection, which has the beneficial effect of adapting the assembly angle according to the specific assembly situation. It solves the problem mentioned in the background art that the L-shaped corner protector is a rigid, non-foldable L-shaped corner protector with a fixed angle design. During assembly, the packaging box must be folded first before it can be installed. The existing corner protectors have a rigid angle and are not suitable for other angles. It is acceptable if the angle difference is not large, but if the angle difference is too large, it cannot be assembled.

[0006] The present invention provides the following technical solution: a foldable corner protector for packaging box protection, comprising a flexible surface layer and a first rigid protective layer and a second rigid protective layer connected to the flexible surface layer;

[0007] The first rigid protective layer and the second rigid protective layer are separated by a flexible surface layer.

[0008] At least one of the first rigid protective layer, the second rigid protective layer, and the head-shaped surface layer is connected to the box.

[0009] As an optional solution for the foldable corner protector for packaging box protection described in this invention, the flexible surface layer is further provided with an elastic structure for adjusting the distance between the first rigid protective layer and the second rigid protective layer.

[0010] As an optional solution for the foldable corner protector for packaging box protection described in this invention, wherein: the elastic structure is a flexible corrugated plate disposed in the middle of the flexible surface layer;

[0011] The flexible surface layer includes a first connecting surface layer connected to a first rigid protective layer and a second connecting surface layer connected to a second rigid protective layer, wherein the first connecting surface layer and the second connecting surface layer are connected by a flexible corrugated plate.

[0012] As an optional solution for the foldable corner protectors for packaging box protection described in this invention, wherein: the elastic structure is a flexible buffer plate;

[0013] Both the first rigid protective layer and the second rigid protective layer are connected to the flexible surface layer through a flexible buffer plate, forming a buffer space between the first rigid protective layer and the flexible surface layer, and forming a buffer space between the second rigid protective layer and the flexible surface layer.

[0014] As an optional solution for the foldable corner protector for packaging box protection described in this invention, wherein: the elastic structure is a flexible corrugated plate disposed in the middle of the flexible surface layer;

[0015] The flexible surface layer includes a first connecting surface layer that is connected to the first rigid protective layer via a flexible buffer plate;

[0016] And a second connecting surface layer that is connected to the second rigid protective layer via a flexible buffer plate;

[0017] Furthermore, the first connecting surface layer and the second connecting surface layer are connected by a flexible corrugated plate;

[0018] As an optional solution for the foldable corner protector for packaging box protection described in this invention, the flexible buffer plate is connected to the first rigid protective layer, and the flexible buffer plate is connected to the second rigid protective layer.

[0019] As an optional solution for the foldable corner protectors for packaging box protection described in this invention, the first rigid protective layer and the second rigid protective layer are further provided with mounting parts for assembly.

[0020] As an alternative solution for the foldable corner protector for packaging box protection described in this invention, the mounting part is an embedded rod vertically disposed on the first rigid protective layer and the second rigid protective layer.

[0021] As an optional solution for the foldable corner protector for packaging box protection described in this invention, wherein: the mounting part is an insert plate vertically disposed on the first rigid protective layer and the second rigid protective layer;

[0022] The insert plate is also provided with a through plug, which is a triangular prism. One side of the through plug is connected to the insert plate and forms a barbed surface.

[0023] As an optional solution for the foldable corner protector for packaging box protection described in this invention, the insert plate is further provided with a V-shaped flexible blocking plate.

[0024] As an optional solution for the foldable corner protectors for packaging box protection described in this invention, it further includes a buffer layer;

[0025] Both the first and second rigid protective layers are connected to the box through the buffer layer.

[0026] As an optional solution for the foldable corner protectors for packaging box protection described in this invention, it further includes a buffer layer;

[0027] Both the first rigid protective layer and the second rigid protective layer are connected to the flexible surface layer through the buffer layer.

[0028] The present invention has the following beneficial effects:

[0029] 1. The foldable corner protector for packaging box protection, through a first rigid protective layer and a second rigid protective layer connected to the flexible surface layer, allows the angle of the corner protector to be adjusted at will, and can be adapted to the corners of various packaging boxes.

[0030] 2. The foldable corner protector used for packaging box protection has an elastic structure that can adjust the distance between the first and second rigid protective layers, that is, adjust the tensile pressure of the flexible surface layer, thereby mitigating the stretching of the flexible surface layer when the corner protector angle becomes smaller.

[0031] 3. The foldable corner protectors used for packaging box protection have an installation part that can be embedded into the box body and has a certain shear resistance. Combined with the adhesive method, the first and second hard protective layers can be more firmly assembled onto the surface of the packaging box. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0034] Figure 3 This is a schematic diagram of the structure of Embodiment 4 of the present invention.

[0035] Figure 4 This is a schematic diagram of the structure of Embodiment 5 of the present invention.

[0036] Figure 5 This is a schematic diagram of a structure according to Embodiment 6 of the present invention.

[0037] Figure 6 This is a schematic diagram of another structure in Embodiment 6 of the present invention.

[0038] Figure 7 This is an enlarged schematic diagram of the structure at point A in this invention.

[0039] Figure 8 This is a schematic diagram of the assembly structure of the foldable corner protector and the box (the box is in a three-dimensional state) according to the present invention.

[0040] Figure 9 This is a schematic diagram of the assembly structure of the foldable corner protector and the box (the box is in a folded state) according to the present invention.

[0041] Figure 10 This is a schematic diagram of the structure of the box in the flattened state and the corner protectors in Embodiment 1 of the present invention.

[0042] Figure 11 This is a schematic diagram of the structure of the box in the folded state and the corner protectors in Embodiment 1 of the present invention.

[0043] Figure 12 This is a schematic diagram of the structure of the box in the flattened state and the corner protectors in Embodiment 3 of the present invention.

[0044] Figure 13 This is a schematic diagram of the structure of the box in the folded state and the corner protectors in Embodiment 3 of the present invention.

[0045] Figure 14 This is a schematic diagram of an assembly structure of the buffer layer in Embodiment 7 of the present invention.

[0046] Figure 15 This is a schematic diagram of another assembly structure of the buffer layer in Embodiment 7 of the present invention.

[0047] In the diagram: 1. Flexible surface layer, 2. First rigid protective layer, 3. Second rigid protective layer, 5. Flexible corrugated plate, 6. Flexible buffer plate, 7. Embedded rod, 8. Insert plate, 9. Plug, 10. Flexible blocking plate, 11. First connecting surface layer, 12. Second connecting surface layer, 13. Buffer space, 14. Hooked surface, 15. Box, 16. Folded edge, 17. Buffer layer. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1

[0050] See Figure 1 and Figure 8-11 A foldable corner protector for packaging box protection includes a flexible surface layer 1 and a first rigid protective layer 2 and a second rigid protective layer 3 connected to the flexible surface layer 1.

[0051] In this embodiment, the flexible surface layer 1 can be a tension support with a certain degree of bendability. The first rigid protective layer 2 and the second rigid protective layer 3 are both made of rigid board and serve to protect the packaging box. The flexible surface layer 1 is connected to the first rigid protective layer 2 and the second rigid protective layer 3 by adhesive bonding.

[0052] When assembling the corner protectors into the stacked packaging boxes, align the foldable corner protectors with the vertical folded edge 16 of the packaging box, stick the first hard protective layer 2 of the corner protectors to one side of the packaging box, and then stick the second hard protective layer 3 to the adjacent packaging box surface.

[0053] If the packaging box is not yet opened and is in a flattened state, the foldable corner protector can also be installed on the packaging box in the same way as described above. Moreover, the angle of the corner protector can be adjusted at will to adapt to the corners of various packaging boxes.

[0054] The flexible surface layer 1, the first rigid protective layer 2, and the second rigid protective layer 3 are all made of elastic and environmentally friendly materials, such as polyethylene and polyurethane.

[0055] Example 2

[0056] Please see Figure 2-4 This embodiment is an improvement on embodiment 1. The flexible surface layer 1 is further provided with an elastic structure for adjusting the spacing between the first hard protective layer 2 and the second hard protective layer 3.

[0057] To prevent excessive tension on the flexible surface layer 1 when the angle between the first rigid protective layer 2 and the second rigid protective layer 3 needs to be reduced after the corner protector is assembled, the elastic structure can adjust the distance between the first rigid protective layer 2 and the second rigid protective layer 3, thereby mitigating the aforementioned tension.

[0058] Example 3

[0059] Please see Figure 2 and Figure 12-13 This embodiment is a structural form of embodiment 2, and the elastic structure is a flexible corrugated plate 5 located in the middle of the flexible surface layer 1;

[0060] The flexible surface layer 1 includes a first connecting surface layer 11 connected to the first rigid protective layer 2 and a second connecting surface layer 12 connected to the second rigid protective layer 3. The first connecting surface layer 11 and the second connecting surface layer 12 are connected by a flexible corrugated plate 5.

[0061] In this embodiment, the flexible corrugated plate 5 is formed by pressing the middle part of the flexible surface layer 1 into a molding device. After being pressed, the flexible surface layer 1 forms the flexible corrugated plate 5, the first connecting surface layer 11, and the second connecting surface layer 12.

[0062] When the included angle of the corner protector is small, the flexible corrugated plate 5 will stretch adaptively to accommodate the change in the angle.

[0063] Example 4

[0064] Please see Figure 3 This embodiment is another structural form of Embodiment 2, and the elastic structure is a flexible buffer plate 6;

[0065] Both the first rigid protective layer 2 and the second rigid protective layer 3 are connected to the flexible surface layer 1 through the flexible buffer plate 6. A buffer space 13 is formed between the first rigid protective layer 2 and the flexible surface layer 1, and a buffer space 13 is formed between the second rigid protective layer 3 and the flexible surface layer 1.

[0066] When the corner protector is installed on the edge of the box and the angle of the corner protector needs to be reduced, the flexible surface layer 1 will be stretched. At this time, the flexible buffer plate 6 will adaptively tilt and change the shape of the buffer space 13 to adapt to the above-mentioned stretching state.

[0067] Example 5

[0068] Please see Figure 4 This embodiment is a combination of embodiments 3 and 4, and the elastic structure is a flexible corrugated plate 5 located in the middle of the flexible surface layer 1;

[0069] The flexible surface layer 1 includes a first connecting surface layer 11 that is connected to the first rigid protective layer 2 via a flexible buffer plate 6;

[0070] And a second connecting surface layer 12 connected to the second rigid protective layer 3 via a flexible buffer plate 6;

[0071] Furthermore, the first connecting surface layer 11 and the second connecting surface layer 12 are connected by a flexible corrugated plate 5;

[0072] The flexible buffer plate 6 is connected to the first rigid protective layer 2, and the flexible buffer plate 6 is connected to the second rigid protective layer 3.

[0073] The flexible buffer plate 6 and the flexible corrugated plate 5 work together to further improve the angle variation range of the corner protector.

[0074] Example 6

[0075] Please see Figure 5-7 This embodiment is an improvement based on embodiment 1. The first hard protective layer 2 and the second hard protective layer 3 are also provided with mounting parts for assembly.

[0076] The bonding method can be either double-sided adhesive or spot bonding. Regardless of the bonding method, the shear force that the bonding joint can withstand is relatively small. That is, when the first hard protective layer 2 or the second hard protective layer 3 slides relative to the surface of the packaging box under the action of external force, the bonding joint is easy to fall off. The mounting part can be embedded in the box body and has a certain shear resistance. Combined with the bonding method, the first hard protective layer 2 and the second hard protective layer 3 can be more firmly assembled on the surface of the packaging box.

[0077] Specifically, such as Figure 5 As shown, the mounting part can be an embedded rod 7 vertically set on the first rigid protective layer 2 and the second rigid protective layer 3.

[0078] The embedded rod 7 can be integrally molded with the rigid protective layer.

[0079] Specifically, such as Figure 6-7 As shown, the mounting part can be an insert plate 8 that is vertically mounted on the first rigid protective layer 2 and the second rigid protective layer 3;

[0080] The insert plate 8 is also provided with a plug 9, which is a triangular prism. One face of the plug 9 is connected to the insert plate 8 and forms a barbed face 14.

[0081] During assembly, the plug 9 can penetrate the surface of the packaging box, while the barbed surface 14 can abut against the inside of the packaging box to minimize the risk of the plug plate 8 detaching from the packaging box.

[0082] Preferably, the insert plate 8 is also provided with a V-shaped flexible baffle plate 10.

[0083] The V-shaped flexible baffle 10 has two sides. One side is connected to the insert plate 8. When the insert plate 8 is inserted into the packaging box, the other side of the flexible baffle 10 is pressed, and its V-angle becomes smaller, ensuring that the insert plate 8 can be inserted smoothly. When the insert plate 8 is fully inserted, the other side of the V-shaped flexible baffle 10 rebounds and abuts against the plug 9. The plug 9 abuts against the inner wall of the packaging box through this side, increasing the contact area with the inner wall of the packaging box and further preventing the insert plate 8 from falling off.

[0084] Example 7

[0085] Based on Example 1, refer to Figure 14-15 This embodiment is an improvement based on embodiment 1, and also includes a buffer layer 17;

[0086] One way to connect the buffer layer 17 is that both the first rigid protective layer 2 and the second rigid protective layer 3 are connected to the box 15 through the buffer layer 17.

[0087] Another way to connect the buffer layer 17 is that both the first rigid protective layer 2 and the second rigid protective layer 3 are connected to the flexible surface layer 1 through the buffer layer 17.

[0088] In the descriptions and illustrations of embodiments 1 to 7 above, when the foldable corner protector protects the packaging box, the flexible surface layer 1 is always on the periphery of the foldable corner protector and is in a semi-enclosed state. This usage method is only one of the usage methods in the embodiments. Other different usage methods that use the technical features of the foldable corner protector described in this embodiment are also considered to be within the scope of protection of the present invention and do not depart from the technical principle of the present invention. For example, in actual use, the flexible surface layer 1 of the foldable corner protector is directly connected to the packaging box, while the first rigid protective layer 2 and the second rigid protective layer 3 are placed outside the flexible surface layer 1.

[0089] The differences between this foldable corner protector and traditional corner protectors lead to differences in its manufacturing method. Therefore, the manufacturing method of this foldable corner protector is disclosed here, including the following processes:

[0090] Process 1: Cut the sheets of flexible surface layer and rigid protective layer into predetermined widths;

[0091] Process 2: The sheets cut to a predetermined width are conveyed to the lamination area via a conveying device to laminate multiple layers of raw materials;

[0092] Process 3: The sheet of the flexible surface layer and the sheet of the rigid protective layer are compositely connected in the composite area, and the connection method includes: bonding and / or hot pressing;

[0093] Process 4: The composite area is also provided with a positioning device to fix the sheet of the flexible surface layer and the sheet of the rigid protective layer at a predetermined position, and the positioning device is provided before and / or during the connecting composite process;

[0094] Process 5: The equipment for preparing the foldable corner protector is also equipped with a cutting device. The cutting device is set after the composite connection process. The cutting device presets the time interval for each cut according to the conveying speed of the conveying device, so as to obtain a corner protector of preset length.

[0095] Process 6: The cutting methods used by the cutting device include: laser, heating wire, and cutting tool;

[0096] Process 7: The equipment for preparing the foldable corner protector is also equipped with a printing device, in which the printing content is preset and printed on the foldable corner protector; the printing content includes: letters, patterns, text, and numbers; the printing methods include: embossing, screen printing, pad printing, transfer printing, inkjet printing, and steel stamping.

[0097] The process steps are not sequential and can be used partially or entirely during production.

[0098] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0099] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A foldable corner protector for packaging box protection, characterized in that: It includes a flexible surface layer (1) and a first rigid protective layer (2) and a second rigid protective layer (3) connected to the flexible surface layer (1); The first rigid protective layer (2) and the second rigid protective layer (3) are separated by a flexible surface layer (1); The first rigid protective layer (2), the second rigid protective layer (3), and the flexible surface layer (1) are at least one of which are connected to the box (15); The flexible surface layer (1) is also provided with an elastic structure for adjusting the distance between the first hard protective layer (2) and the second hard protective layer (3); The elastic structure is a flexible buffer plate (6); the first hard protective layer (2) and the second hard protective layer (3) are both connected to the flexible surface layer (1) through the flexible buffer plate (6), and a buffer space (13) is formed between the first hard protective layer (2) and the flexible surface layer (1), and a buffer space (13) is formed between the second hard protective layer (3) and the flexible surface layer (1).

2. The foldable corner protector for packaging box protection according to claim 1, characterized in that: The flexible surface layer (1), the first rigid protective layer (2), and the second rigid protective layer (3) are made of environmentally friendly and biodegradable materials.

3. The foldable corner protector for packaging box protection according to claim 1, characterized in that: The first hard protective layer (2) and the second hard protective layer (3) are also provided with mounting parts for assembly.

4. The foldable corner protector for packaging box protection according to claim 3, characterized in that: The mounting part is an embedded rod (7) that is vertically set on the first hard protective layer (2) and the second hard protective layer (3).

5. The foldable corner protector for packaging box protection according to claim 3, characterized in that: The mounting part is an insert plate (8) that is vertically installed on the first rigid protective layer (2) and the second rigid protective layer (3). The insert plate (8) is also provided with a plug (9), which is a triangular prism. One side of the plug (9) is connected to the insert plate (8) and forms a barbed surface (14).

6. The foldable corner protector for packaging box protection according to claim 5, characterized in that: The insert plate (8) is also provided with a V-shaped flexible baffle plate (10).

7. The foldable corner protector for packaging box protection according to claim 1, characterized in that: It also includes a buffer layer (17); The first hard protective layer (2) and the second hard protective layer (3) are both connected to the box (15) through the buffer layer (17).

8. The foldable corner protector for packaging box protection according to claim 1, characterized in that: It also includes a buffer layer (17); The first rigid protective layer (2) and the second rigid protective layer (3) are both connected to the flexible surface layer (1) through the buffer layer (17).

9. A packaged product, characterized in that: The packaging product uses corner protectors as described in any one of claims 1 to 8.

10. A method for producing a foldable corner protector for packaging box protection as described in claim 1, comprising the following processes: Process 1: Cut the sheets of flexible surface layer and rigid protective layer into predetermined widths; Process 2: The sheets cut to a predetermined width are conveyed to the lamination area via a conveying device to laminate multiple layers of raw materials; Process 3: The sheet of the flexible surface layer and the sheet of the rigid protective layer are compositely connected in the composite area, and the connection method includes: bonding and / or hot pressing; Process 4: The composite area is also provided with a positioning device to fix the sheet of the flexible surface layer and the sheet of the rigid protective layer at a predetermined position, and the positioning device is provided before and / or during the connecting composite process; Process 5: The equipment for preparing the foldable corner protector is also equipped with a cutting device. The cutting device is set after the composite connection process. The cutting device presets the time interval for each cut according to the conveying speed of the conveying device, so as to obtain a corner protector of preset length. Process 6: The cutting methods used by the cutting device include: laser, heating wire, and cutting tool; Process 7: The equipment for preparing the foldable corner protector is also equipped with a printing device, in which the printing content is preset and printed on the foldable corner protector; the printing content includes: letters, patterns, text, and numbers; the printing methods include: embossing, screen printing, pad printing, transfer printing, inkjet printing, and steel stamping. The steps in the process are not in any particular order.

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