Nail-free and glue-free self-locking type packaging box and preparation method thereof

Abstract

The invention provides a nail-free and glue-free self-locking type packaging box and a preparation method thereof.The nail-free and glue-free self-locking type packaging box comprises a box body part, a box bottom part and a box cover part, the box body part is inserted into the inner side of a wall plate from the outer side of the foremost wall plate through an insertion hole by means of a folding side plate at the tail, and the inner side of the box body part is fixedly inserted into a fixing hole, so that fixation is achieved; the box bottom part comprises two first bottom plates and two second bottom plates, the two first bottom plates are folded to form an insertion port, the tail ends of the second bottom plates are connected with third bottom plates, and the third bottom plates are inserted through the insertion port and are reversely folded and fixed; the box cover part comprises two first cover plates and two second cover plates, the first cover plates are provided with inserting openings, inserting lugs are arranged on the two sides of the second cover plates, and the inserting lugs of the second cover plates are fixedly inserted into the inserting openings, so that fixing is achieved, and a nail-free and glue-free self-locking structure is achieved.

Description

Technical Field

[0001] The invention relates to the field of packaging boxes, and in particular to a nail-free and glue-free self-locking packaging box and a preparation method thereof. Background Art

[0002] As an important protective tool for people in the process of transporting and storing goods, the main functions of packaging boxes cover many aspects. In the field of transportation packaging, it aims to minimize the damage to products caused by the transportation process, ensure product safety, facilitate storage and loading and unloading, and accelerate handover inspection. The outer packaging that is usually used for transportation and storage is not only to protect the goods and prevent damage and loss of goods during storage and transportation, but also to minimize the impact of various external conditions on the goods during transportation, while facilitating inspection, counting and distribution. In addition, in addition to the above practical functions, packaging boxes can also beautify and promote goods. Generally speaking, packaging boxes are made of green and environmentally friendly materials to facilitate environmental protection and loading and unloading.

[0003] However, most of the existing packaging boxes use 0201 slotted packaging boxes, which are traditional docking boxes. This type of packaging box has many shortcomings. Even if the material used is environmentally friendly (such as paper), it is still necessary to use glue or nails to seal one side of the outer box during the molding process. And when sealing the box, the bottom and lid of the packaging box must be sealed with sealing tape. The problem is that 1. The edge sealing with nails cannot or is difficult to disassemble; 2. The adhesive used in the edge sealing glue and sealing tape generally contains formaldehyde and other ingredients, which leads to environmentally unfriendly situations; in addition, the packaging box sealed with sealing tape must be cut or torn off when unpacking. This not only wastes a long time for assembly and disassembly, reduces assembly and disassembly efficiency, but also damages the outer box of the packaging, making it impossible to reuse the outer box of the packaging, thereby causing a waste of resources. Summary of the invention

[0004] To this end, the present invention aims to solve the following problems existing in the prior art: glue or nails are needed to seal the outer box during molding, and sealing tape is needed to seal the bottom and cover of the packaging box during sealing. The glue contained in the edge-sealing glue and the sealing tape generally contains formaldehyde and other components that are not environmentally friendly. Moreover, the sealing tape packaging causes time-consuming and low efficiency in unpacking, and also damages the outer box so that it cannot be reused, resulting in technical and resource waste. Provided is a nail-free and glue-free self-locking packaging box and a preparation method thereof.

[0005] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0006] A nail-free and glue-free self-locking packaging box, comprising a box body, a box bottom part connected to the bottom opening of the box body, and a box cover part connected to the top opening of the box body; in a sealed state: the box body comprises a plurality of wall panels connected end to end and folded to form a peripheral wall of the box body, and a folding side panel connected to the end of the last wall panel, the front wall panel of the plurality of wall panels is provided with an insertion hole and a fixing hole, the folding side panel is inserted into the inner side of the wall panel through the insertion hole on the outer side of the front wall panel and the inner side is fixedly inserted into the fixing hole to fix the box body; the box bottom part comprises a set of two first side panels which are arranged opposite to each other and folded inwardly A bottom plate and a group of two second bottom plates which are arranged opposite to each other and folded inwardly to the outside of the first bottom plate, the two first bottom plates are provided with corresponding insertion notches to form an insertion interface, the ends of the two second bottom plates are connected to the third bottom plates, the third bottom plates are inserted through the insertion interface and folded in reverse to be fixed, so as to fix the bottom part of the box; the box cover part includes a group of two first cover plates which are arranged opposite to each other and folded inwardly and a group of two second cover plates which are arranged opposite to each other and folded inwardly to the outside of the first cover plate, the first cover plate is provided with a socket, and ears are provided on both sides of the second cover plate, and the ears of the second cover plate are fixedly inserted into the socket to fix the box cover part.

[0007] Furthermore, the box body part has four wall panels, and the four wall panels constitute a square box frame; the two first bottom plates of the box bottom part are connected to two oppositely arranged wall panels, and the two second bottom plates are connected to another two oppositely arranged wall panels; the two first cover plates of the box cover part are connected to two oppositely arranged wall panels, and the two second cover plates are connected to another two oppositely arranged wall panels.

[0008] Furthermore, the fixing hole on the frontmost wall panel is located in front of the insertion hole, and the folding side panel is inserted into the inner side of the wall panel through the insertion hole and then folded in the reverse direction until it is inserted into the fixing hole from the inner side.

[0009] Furthermore, the folding side panel includes a first side panel connected to the end of the last wall panel, a second side panel connected to the end of the first side panel, and a fixing ear connected to the end of the second side panel, the first side panel is located on the outer side of the first wall panel, the second side panel is inserted through the insertion hole and folded reversely to fit the inner side of the wall panel, and the fixing ear is fixedly inserted in the fixing hole.

[0010] Furthermore, the head end of the foremost wall panel is also connected to a wing plate, the wing plate abuts against the inner side of the last wall panel, and the fixing hole is arranged at the connection position between the foremost wall panel and the wing plate.

[0011] Furthermore, the third bottom plate of the box bottom part is folded in reverse and fixedly abutted against the inner side of the wall plate of the box body part in the form of interference fit.

[0012] Furthermore, a gap is formed at the end of the third bottom plate where it abuts against the wall plate.

[0013] A method for preparing a nail-free and glue-free self-locking packaging box comprises the following steps:

[0014] S1, prepare a box flat plate, the box flat plate having a plurality of wall panels connected end to end, a folding side panel connected to the end of the last wall panel, two first bottom panels and two second bottom panels connected to one side of the plurality of wall panels, and two first cover panels and two second cover panels connected to the other side of the plurality of wall panels; the front wall panel of the plurality of wall panels is provided with an insertion hole and a fixing hole; the two first bottom panels and the two second bottom panels are arranged alternately, the two first bottom panels are provided with insertion notches, and the end of the second bottom panel is connected to the third bottom panel; the two first cover panels and the two second cover panels are arranged alternately, the first cover panels are provided with sockets, and the second cover panels are provided with plug ears;

[0015] S2, folding a plurality of wall panels and splicing them end to end to obtain a hollow box body portion, then folding the folded side panels to the outside of the front wall panel, and inserting them into the inside of the wall panel through the insertion hole, and then inserting them into the fixing hole from the inside of the wall panel in reverse direction to obtain the box body portion;

[0016] S3, first fold the two first bottom plates inwardly so that the insertion notches of the two first bottom plates correspond to each other and form an insertion port, then fold the two second bottom plates inwardly, and align the third bottom plate with the insertion port and insert it into the box body; finally, fold the third bottom plate in the box body in the opposite direction and fix it to seal the bottom opening of the box body;

[0017] S4, when the top opening needs to be sealed, first fold the two first cover plates inward, and then fold the two second cover plates inward, and at the same time align the ears with the sockets and insert and fix them; complete the sealing of the top opening of the box body.

[0018] The technical solution provided by the present invention has the following beneficial effects:

[0019] 1. Environmental advantages: The packaging box of the present application completely abandons the glue, nails and sealing tape containing formaldehyde and other ingredients used in the molding and sealing process of traditional packaging boxes, fundamentally avoiding the environmentally unfriendly problems such as formaldehyde release caused by these materials, and meets modern environmental protection requirements.

[0020] 2. Improved assembly and disassembly efficiency: Due to the adoption of a self-locking structure, during the packing and unpacking process, there is no need to spend a lot of time tearing or cutting the sealing tape, nor is there a need to use tools to remove nails, etc. You only need to follow the corresponding self-locking structure to quickly complete the assembly and disassembly process, greatly improving the assembly and disassembly efficiency.

[0021] 3. Reusable: Because the outer box of the packaging box will not be damaged during the assembly and disassembly process, the packaging box of the present application can still maintain its complete structure after completing a transportation or storage task, and can be conveniently used next time, thereby realizing the effective use of resources and reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure shows a schematic structural diagram of a nail-free and glue-free self-locking packaging box in an embodiment after it is fully unfolded;

[0023] Figure 2 The figure shows a schematic structural diagram of the box body assembly of a self-locking packaging box without nails or glue in an embodiment;

[0024] Figure 3 The figure shows the interior of the box body of the self-locking packaging box without nails or glue in the embodiment;

[0025] Figure 4 The figure shows a schematic diagram of the structure of the bottom part of the self-locking packaging box without nails or glue in the embodiment;

[0026] Figure 5 The figure shows the structure of the cover assembly part of the self-locking packaging box without nails or glue in the embodiment. DETAILED DESCRIPTION

[0027] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0028] In the description of the present invention, terms such as "up", "down", "left", "right", "front", "back", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0029] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0030] Reference Figures 1 to 5 As shown, the present embodiment provides a nail-free and glue-free self-locking packaging box, comprising a box body 10, a box bottom 20 connected to the bottom opening of the box body 10, and a box cover 30 connected to the top opening of the box body 10, wherein in the sealed state:

[0031] The box body portion 10 includes a plurality of wall panels 11 which are connected end to end and folded to form the peripheral wall of the box body, and a folded side panel 14 connected to the end of the last wall panel 11. In the present specific embodiment, there are four wall panels 11, which are, from front to back, the first wall panel 111, the second wall panel 112, the third wall panel 113 and the fourth wall panel 114, the first wall panel 111 being the front wall panel 11, and the fourth wall panel 114 being the last wall panel 11; the first wall panel 111 is provided with an insertion hole 12 and a fixing hole 13, wherein the insertion hole 12 is a long strip slot, and the number of the fixing holes 13 is two.

[0032] In the constructed box wall structure, the head end of the first wall panel 111 and the end of the fourth wall panel 114 are butt-jointed; the folding side panel 14 is inserted into the inner side of the wall panel 11 (referring to the first wall panel 111) through the insertion hole 12 on the outer side of the first wall panel 111 and is fixedly inserted into the fixing hole 13 on the inner side to fix the box part 10.

[0033] As in this embodiment, and in this embodiment, the fixing hole 13 is located at the front side of the insertion hole 12, the folding side panel 14 is inserted into the inner side of the wall panel 11 (specifically the first wall panel 111) through the insertion hole 12, and then folded back until it is inserted into the fixing hole 13 from the inside. The specific implementation method is: the folding side panel 14 includes a first side panel 141 connected to the end of the fourth wall panel 114, a second side panel 142 connected to the end of the first side panel 141, and a fixing ear 143 connected to the end of the second side panel 142, the first side panel 141 is located on the outer side of the first wall panel 111, the second side panel 142 is inserted through the insertion hole 12 and folded back to fit the inner side of the wall panel 11 (referring to the first wall panel 111), and the fixing ear 143 is fixedly inserted into the fixing hole 13, so that the folding side panel 14 is fixed to the first wall panel 111, especially the front end of the first wall panel 111 is fixed to prevent the front end of the first wall panel 111 from separating inward.

[0034] Specifically, in this embodiment, the head end of the first wall plate 111 is further connected to a wing plate 15, the wing plate 15 abuts against the inner side of the fourth wall plate 114, and the fixing hole 13 is provided at the connection position between the first wall plate 111 and the wing plate 15. Of course, in other embodiments, the fixing hole 13 may also be provided on the body of the first wall plate 111, and the structure of the wing plate 15 may not be adopted.

[0035] The box bottom portion 20 includes a group of two first bottom plates 21 that are oppositely arranged and folded inwardly, and a group of two second bottom plates 22 that are oppositely arranged and folded inwardly to the outside of the first bottom plates 21. Specifically, the two first bottom plates 21 are connected to two oppositely arranged wall plates 11, and the two second bottom plates 22 are connected to another two oppositely arranged wall plates 11; as in this embodiment, the two first bottom plates 21 are connected to the first wall plate 111 and the third wall plate 113; the two second bottom plates 22 are connected to the second wall plate 112 and the fourth wall plate 114. The two first bottom plates 21 are provided with corresponding insertion notches 211 to form an insertion interface, and the ends of the two second bottom plates 22 are connected to the third bottom plates 23, and the third bottom plates 23 are inserted through the insertion interface and folded in reverse to fix the box bottom part 20; as in this embodiment, the third bottom plate 23 of the box bottom part 20 is folded in reverse and fixedly abutted against the inner side of the wall plate 11 of the box body part 10 in the form of interference fit, that is, after the third bottom plate 23 is inserted through the insertion interface, it is folded in reverse to the second bottom plate 22 connected thereto. The bottom plate 22 is folded in the direction of the bottom plate 22, and finally the end abuts against the wall plate 11. Taking the second bottom plate 22 connected to the second wall plate 112 as an example, the third bottom plate 23 connected to the second bottom plate 22 is inserted through the plug interface, and then folded toward the second bottom plate 22, and finally abutted and fixed with the second wall plate 112. The fixed abutment in the form of interference fit means that the length of the third bottom plate 23 is slightly longer than the distance from the plug interface to the wall plate 11 (such as the second wall plate 112), so that the third bottom plate 23 can be well fixed after being folded in the opposite direction.

[0036] Furthermore, a clearance notch 24 is provided at the end where the third bottom plate 23 abuts against the wall plate 11. The function of the clearance notch 24 is to allow fingers or tools to be inserted through the clearance notch 24 when disassembly is required, thereby pulling out the third bottom plate 23 and disengaging it from the abutment with the wall plate 11, thereby facilitating the disassembly operation.

[0037] The box cover part 30 includes a group of two first cover plates 31 that are arranged opposite to each other and folded inwardly, and a group of two second cover plates 32 that are arranged opposite to each other and folded inwardly to the outside of the first cover plates 31. For example, in this specific embodiment, the two first cover plates 31 are respectively connected to the first wall plate 111 and the third wall plate 113; the two second cover plates 32 are respectively connected to the second wall plate 112 and the fourth wall plate 114; the first cover plate 31 is provided with a socket 33, and both sides of the second cover plate 32 are provided with plug ears 34, and the plug ears 34 of the second cover plate 32 are fixedly inserted into the socket 33 to fix the box cover part 30. It can be understood that the plug ears 34 and the socket 33 are also matched in an interference fit manner to achieve the effect of self-damping, and the box cover part 30 is kept fixed by relying on the damping force.

[0038] Specifically, when packing, the box body 10 and the box bottom 20 can be assembled. After the packing is completed, the box cover 30 can be assembled and fixed. The fixation is achieved through its own structure, and a self-locking fixation without nails or glue is realized. When unpacking, the two second cover plates 32 are flipped open by applying external force, and the plug ears 34 are naturally pulled out to complete the disassembly of the box cover 30, so that the items in the box can be removed. When it is necessary to disassemble and store, the two third bottom plates 23 are continuously pulled out to disengage from the abutment with the wall plate 11, and then the third bottom plates 23 are withdrawn from the plug interface formed by the two first bottom plates 21 to complete the disassembly of the box bottom 20; subsequently, the fixed ear 143 is pulled out from the fixing hole 13 of the first wall plate 111, and then the second side plate 142 of the folding side plate 14 is withdrawn from the insertion hole 12 of the first wall plate 111, so that the disassembly of the box body 10 is completed; the complete disassembly of the packaging box is also completed, and the following is obtained. Figure 1 The flat plate structure of the box is shown in a flat state.

[0039] Furthermore, this embodiment also provides a method for preparing the above-mentioned nail-free and glue-free self-locking packaging box, comprising the following steps:

[0040] S1, prepared as Figure 1 The box flat plate shown in the figure has four wall panels 11 connected end to end, a folding side panel 14 connected to the end of the last wall panel 11, two first bottom panels 21 and two second bottom panels 22 connected to one side of the plurality of wall panels 11, and two first cover panels 31 and two second cover panels 32 connected to the other side of the plurality of wall panels 11; specifically, the four wall panels 11 are the first wall panel 111, the second wall panel 112, the third wall panel 113 and the fourth wall panel 114 from front to back, the first wall panel 111 is the front wall panel 11, and the fourth wall panel 114 is the last wall panel 11; the first wall panel 111 is provided with an insertion hole 12 and a fixing hole 13; the two first bottom panels 21 and the second bottom panels 22 are connected to one side of the plurality of wall panels 11; 1 and two second bottom plates 22 are staggered. In this embodiment, the two first bottom plates 21 are connected to the first wall plate 111 and the third wall plate 113; the two second bottom plates 22 are connected to the second wall plate 112 and the fourth wall plate 114; the two first bottom plates 21 are provided with insertion notches 211, and the ends of the second bottom plates 22 are connected to the third bottom plates 23; the two first cover plates 31 and the two second cover plates 32 are staggered. In this embodiment, the two first cover plates 31 are respectively connected to the first wall plate 111 and the third wall plate 113; the two second cover plates 32 are respectively connected to the second wall plate 112 and the fourth wall plate 114; the first cover plate 31 is provided with a socket 33, and the second cover plate 32 is provided with an insert ear 34.

[0041] Specifically, in this embodiment, the box body flat plate is made of a paper flat plate with a corrugated structure.

[0042] S2, such as Figure 2 and Figure 3 As shown, four wall panels 11 are folded and spliced ​​end to end to obtain a hollow box portion, and then the folded side panel 14 is folded to the outside of the first wall panel 111, and inserted into the inside of the wall panel 11 (referring to the first wall panel 111) through the insertion hole 12, and then inserted into the fixing hole 13 from the inside of the wall panel 11 (referring to the first wall panel 111) in reverse direction to obtain the box portion 10;

[0043] S3, such as Figure 4 As shown, the two first bottom plates 21 are first folded inwardly so that the insertion notches 211 of the two first bottom plates 21 correspond to each other and form an insertion interface, and then the two second bottom plates 22 are folded inwardly, and the third bottom plate 23 is aligned with the insertion interface and inserted into the box body; finally, the third bottom plate 23 located in the box body is folded in the opposite direction and fixed to seal the bottom opening of the box body part 10;

[0044] At this point, the packaging box can be filled with items.

[0045] S4, when the top opening needs to be sealed, first fold the two first cover plates 31 inwards, then fold the two second cover plates 32 inwards, and at the same time align the ear 34 with the socket 33 and insert and fix it. Figure 5 As shown; the top opening of the box body portion 10 is sealed.

[0046] The solution provided by this application has the following beneficial effects:

[0047] 1. The packaging box of the present application completely abandons the glue, nails and sealing tape containing formaldehyde and other ingredients used in the molding and sealing process of traditional packaging boxes, fundamentally avoiding the environmentally unfriendly problems such as formaldehyde release caused by these materials, and meets modern environmental protection requirements.

[0048] 2. Due to the adoption of the self-locking structure, during the packing and unpacking process, there is no need to spend a lot of time to tear or cut the sealing tape, nor is there a need to use tools to remove nails, etc. You only need to follow the corresponding self-locking structure to quickly complete the assembly and disassembly process, which greatly improves the assembly and disassembly efficiency.

[0049] 3. Because the outer box of the packaging box will not be damaged during the assembly and disassembly process, after completing a transportation or storage task, the packaging box of the present application can still maintain its complete structure, including the box body 10, the box cover 30 and the box bottom 20, so that it can be conveniently used next time, thus realizing the effective use of resources and reducing resource waste.

[0050] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A nail-free and glue-free self-locking packaging box, comprising a box body, a box bottom connected to the bottom opening of the box body, and a box cover connected to the top opening of the box body, characterized in that: In the sealed state: The box body portion includes a plurality of wall panels connected end to end and folded to form the peripheral wall of the box body, and a folded side panel connected to the end of the last wall panel, the front wall panel of the plurality of wall panels is provided with an insertion hole and a fixing hole, the folded side panel is inserted into the inner side of the wall panel through the insertion hole on the outer side of the front wall panel and is fixedly inserted into the fixing hole on the inner side to fix the box body portion; The box bottom portion includes a set of two first bottom plates that are arranged opposite to each other and folded inwardly, and a set of two second bottom plates that are arranged opposite to each other and folded inwardly to the outside of the first bottom plates. The two first bottom plates are provided with corresponding insertion notches to form an insertion interface. The ends of the two second bottom plates are both connected to a third bottom plate. The third bottom plate is inserted through the insertion interface and folded in reverse to be fixed, so as to fix the box bottom portion. The box cover part includes a group of two first cover plates that are arranged opposite to each other and folded inwardly, and a group of two second cover plates that are arranged opposite to each other and folded inwardly to the outside of the first cover plates. The first cover plates are provided with sockets, and ears are provided on both sides of the second cover plates. The ears of the second cover plates are fixedly inserted into the sockets to fix the box cover part.

2. The nail-free and glue-free self-locking packaging box according to claim 1, characterized in that: The box body part has four wall panels, and the four wall panels constitute a square box frame; the two first bottom plates of the box bottom part are connected to two oppositely arranged wall panels, and the two second bottom plates are connected to another two oppositely arranged wall panels; the two first cover plates of the box cover part are connected to two oppositely arranged wall panels, and the two second cover plates are connected to another two oppositely arranged wall panels.

3. The nail-free and glue-free self-locking packaging box according to claim 1, characterized in that: The fixing hole on the frontmost wall panel is located in front of the insertion hole, and the folding side panel is inserted into the inner side of the wall panel through the insertion hole and then folded in the reverse direction until it is inserted into the fixing hole from the inner side.

4. The nail-free and glue-free self-locking packaging box according to claim 3 is characterized in that: The folding side panel includes a first side panel connected to the end of the last wall panel, a second side panel connected to the end of the first side panel, and a fixing ear connected to the end of the second side panel, the first side panel is located on the outer side of the first wall panel, the second side panel is inserted through the insertion hole and folded reversely to fit the inner side of the wall panel, and the fixing ear is fixedly inserted in the fixing hole.

5. The nail-free and glue-free self-locking packaging box according to claim 1 or 4, characterized in that: The head end of the foremost wall panel is also connected with a wing panel, and the wing panel abuts against the inner side of the last wall panel. The fixing hole is arranged at the connection position between the foremost wall panel and the wing panel.

6. The nail-free and glue-free self-locking packaging box according to claim 1, characterized in that: The third bottom plate of the box bottom part is folded in reverse and fixedly abutted against the inner side of the wall plate of the box body part in the form of interference fit.

7. The nail-free and glue-free self-locking packaging box according to claim 6, characterized in that: The end of the third bottom plate abutting against the wall plate is provided with a clearance gap.

8. A method for preparing a nail-free and glue-free self-locking packaging box, characterized in that: The steps include: S1, prepare a box flat plate, the box flat plate having a plurality of wall panels connected end to end, a folding side panel connected to the end of the last wall panel, two first bottom panels and two second bottom panels connected to one side of the plurality of wall panels, and two first cover panels and two second cover panels connected to the other side of the plurality of wall panels; the front wall panel of the plurality of wall panels is provided with an insertion hole and a fixing hole; the two first bottom panels and the two second bottom panels are arranged alternately, the two first bottom panels are provided with insertion notches, and the end of the second bottom panel is connected to the third bottom panel; the two first cover panels and the two second cover panels are arranged alternately, the first cover panels are provided with sockets, and the second cover panels are provided with plug ears; S2, folding a plurality of wall panels and splicing them end to end to obtain a hollow box body portion, then folding the folded side panels to the outside of the front wall panel, and inserting them into the inside of the wall panel through the insertion hole, and then inserting them into the fixing hole from the inside of the wall panel in reverse direction to obtain the box body portion; S3, first fold the two first bottom plates inwardly so that the insertion notches of the two first bottom plates correspond to each other and form an insertion port, then fold the two second bottom plates inwardly, and align the third bottom plate with the insertion port and insert it into the box body; finally, fold the third bottom plate in the box body in the opposite direction and fix it to seal the bottom opening of the box body; S4, when the top opening needs to be sealed, first fold the two first cover plates inward, and then fold the two second cover plates inward, and at the same time align the ears with the sockets and insert and fix them; complete the sealing of the top opening of the box body.

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