Multi-cavity large plastic airtight packaging box

Abstract

The utility model discloses a multi-chamber large plastic airtight packaging box, which structurally comprises a box body, a box cover and the like, and is mainly characterized in that the box body consists of an inner box body and an outer box body which are integrated through rotational molding, and a PU (polyurethane) foaming material is filled between the inner box body and the outer box body; meanwhile, the inner box body is composed of a plurality of cavities which are connected into a whole, a cavity opening is formed in the top of each cavity, and the cavity opening in the top of each cavity is covered with an independent box cover; therefore, the PU foaming material is filled in the double-layer box body, and the multi-cavity structure which is integrally formed in a rotational molding manner is combined, so that the structural strength of the box body can be improved, the box body has enough buffering capacity when being subjected to large external impact, particularly, the independent box cover is adopted by the multiple cavities for covering, the volume of the box cover cannot be increased, the weight of the box cover cannot be increased, the structural reliability is improved, and the service life of the box body is prolonged. The use is more convenient, flexible and labor-saving; and meanwhile, the volume of the box cover does not need to be increased, the flatness of the contact surface can be ensured, and the rotational molding integrated structure can simplify the production process and improve the production efficiency.

Description

Technical Field

[0001] The utility model relates to an airtight packaging box, in particular to a large-scale plastic airtight packaging box with multiple chambers. Background Art

[0002] At present, large plastic airtight packaging boxes are mainly composed of a box body and a box cover on the top of the box body. The box body is usually a single-layer single-chamber box body, and there are many defects in actual use. First, the box body is a single-layer rotationally molded box body and is stuffed with cushioning materials to ensure the cushioning of the built-in items. This still cannot have sufficient cushioning capacity when subjected to a large external impact, so it cannot provide greater protection for the items stored inside; second, the single-chamber structure of the box body means that the built-in items can only be separated by a grid-like partition with multiple grids placed in the box body to separate the multiple chambers. Since this partition structure is not rotationally molded with the box body, it is easy to displace when subjected to a large external impact, and brings the risk of collision damage to the built-in items; third, the box body with a single-chamber structure has only one box cover. When the box body has a built-in grid-like partition to separate the multiple chambers, if the grid partition needs to be removed When an item is placed in the grid partition, the lid needs to be opened together, which is very inconvenient to use. In particular, as the volume of the box increases and the number of chambers with grid-like partitions inside increases, the volume of the lid often increases and becomes heavier, which not only makes it more laborious and troublesome to open the lid, but also requires more auxiliary accessories to be added between the lid and the box body. For example, more hinged parts need to be added on one side, which affects the reliability of the structure and makes the contact surface that is rotationally molded with the lid not smooth enough. That is, the larger the volume of the lid, the more deformation and unevenness will appear on the contact surface of the lid on the top of the box, thereby failing to ensure close contact of the contact surface and affecting the air tightness of the packaging box. Although some manufacturers also perform separate injection molding of the contact surface and embed it into the structure by assembly, there is still a certain inconvenience compared to one-piece rotation molding. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a large-scale plastic airtight packaging box with multiple chambers, which has high structural strength, reliable use, good impact buffering capacity, convenient and flexible use, and labor-saving, and the box cover and the box body can be integrally rotationally molded.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A multi-chamber large-scale plastic airtight packaging box, comprising a box body and a box cover on the top of the box body; the box body is composed of an inner box body and an outer box body which are rotationally molded as one, and PU foam material is filled between the inner and outer boxes; the inner box body is composed of a plurality of chambers connected as one, and a cavity opening is formed at the top of each chamber, and the cavity opening at the top of each chamber is covered by an independent box cover; a drainage hole is provided on the side or bottom of each chamber, and the drainage hole passes through the outer box body, and the hole wall of the drainage hole is rotationally molded as one with the inner and outer boxes.

[0006] An annular boss is provided on the outer circumference of the cavity opening at the top of each chamber, and the box cover is covered on the annular boss to seal the cavity opening.

[0007] The annular boss is formed by directly protruding upward from the top surface of the inner box body.

[0008] The annular boss is provided with a circle of outwardly protruding positioning protrusions, and the positioning protrusions are formed by the top surface of the annular boss directly protruding upwards.

[0009] A hinge shaft and a hinge seat for hinged installation are respectively arranged between the box cover and the annular boss, and the box cover is opened and closed relative to the annular boss via the hinge shaft and the hinge seat for hinged installation.

[0010] A plurality of mounting grooves are arranged between the box cover and the annular boss, each of the mounting grooves is provided with a lock, and the box cover and the annular boss are locked by the lock.

[0011] The box cover is composed of an inner cover and an outer cover. The outer circumference of the inner cover is provided with an inner edge extending downwardly, and the outer circumference of the outer cover is provided with an outer edge extending downwardly. The inner and outer edges are connected by groove sheets to make the inner and outer covers integrally formed by rotational molding.

[0012] The groove sheet is provided with a circle of inwardly concave positioning grooves, which are formed by directly inwardly concavely forming the bottom surface of the groove sheet; the box cover is closed on the annular boss, and the positioning protrusion is fitted in the positioning groove, thereby forming a positioning and close fit between the groove sheet and the top surface of the annular boss.

[0013] The outer surface of the outer box body is provided with a plurality of circumferentially distributed and integrally rotationally molded reinforcement grooves, and the bottom surface of the outer box body is provided with a plurality of integrally rotationally molded support feet.

[0014] The top surface of the outer cover is provided with a plurality of top grooves, which are parallel to each other and extend along the axial direction, and each top groove is formed by directly concavely forming the top surface of the outer cover.

[0015] Compared with the prior art, the utility model mainly adopts a box body composed of an inner box body and an outer box body that are integrally formed by rotational molding, and fills PU foam material between the inner and outer boxes; at the same time, the inner box body is composed of a plurality of chambers connected into one body, and a cavity opening is formed on the top of each cavity, and the cavity opening on the top of each cavity is covered by an independent box cover; in this way, by filling the double-layer box body with PU foam material and combining the integral rotationally molded multi-chamber structure, not only the structural strength of the box body can be increased, but also sufficient buffering capacity can be provided when the box body is subjected to a large external impact, especially the independent box cover adopted by the multi-chamber Even if the box body increases in size and the number of chambers increases, the box cover will not increase in size or become heavier, thus avoiding the trouble of adding more auxiliary accessories to the covering structure between a single box cover and a multi-chamber box body in the traditional structure, improving structural reliability, and making it more convenient, flexible, and labor-saving to use; at the same time, the box cover does not need to increase in size, and can ensure the flatness of the contact surface that is rotationally molded with the box cover, so that the contact surface can form a close contact, thereby avoiding affecting the airtightness of the packaging box; in addition, the double-layer multi-chamber box body and the double-layer box cover can be integrally formed by rotational molding, which simplifies the production process and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1 A-A section enlarged view.

[0018] Figure 3 for Figure 2 Enlarged view of point B.

[0019] Figure 4 for Figure 2 Enlarged view of point C.

[0020] Figure 5 for Figure 1 Top view of the .

[0021] Figure 6 for Figure 5 D-D section view.

[0022] Figure 7 for Figure 1 Bottom view of .

[0023] Figure 8 for Figure 1 Enlarged left view of .

[0024] Fig. 9 for Figure 1 The first viewing stereogram of .

[0025] Fig.10 for Figure 1Second viewing stereogram of .

[0026] Fig.11 for Figure 1 The third viewing stereogram of .

[0027] Fig.12 for Figure 1 The fourth viewing angle of the stereogram. DETAILED DESCRIPTION

[0028] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

[0029] like Figure 1 to Figure 12 As shown, 1. box body, 11. inner box body, 111. chamber, 12. outer box body, 121. reinforcement groove, 122. support foot, 13. annular boss, 131. positioning boss, 132. opening groove, 14. hinge seat, 2. box cover, 21. inner cover, 211. inner edge, 22. outer cover, 221. outer edge, 222. top groove, 23. groove sheet, 231. positioning groove, 24. hinge shaft, 3. lock, 4. installation groove, 5. drainage hole.

[0030] A large multi-chamber plastic airtight packaging box, such as Figure 9~Figure 12 As shown, it is mainly used for the airtight storage of articles, and its structure includes a box body 1 and a box cover 2 on the top of the box body.

[0031] The box body 1 is composed of an inner box body 11 and an outer box body 12 which are rotationally molded as one, that is, the top outer circumference of the inner box body 11 is connected with the top outer circumference of the outer box body 12 by rotational molding, and the interlayer formed between the inner and outer boxes is filled with PU foam material.

[0032] The inner box body 11 is composed of a plurality of chambers 111 connected in one body. In this embodiment, the inner box body is composed of four chambers 111 connected in one body, that is, the four chambers are formed into a connected structure with the rotational molding of the inner box body 11. Figure 2 , Figure 6 As shown, each chamber 111 is in the shape of an inverted quadrangular pyramid with a large mouth and a small bottom. The top of each chamber 111 forms a rectangular cavity opening. The outer circumference of each cavity opening is provided with a rectangular annular boss 13, which is formed by the top surface of the inner box body 11 directly protruding upward. The cavity opening on the top of each chamber 111 is covered by an independent box cover 2, usually by directly covering the annular boss 13 to close the cavity opening.

[0033] A drainage hole 5 is provided on the side or bottom of each chamber 111, and the drainage hole passes through the outer box body 12. The hole wall of the drainage hole 5 is rotationally molded with the inner and outer boxes. Therefore, each chamber 111 of the inner box body 11 can directly drain the internal accumulated water out of the outer box body 12 through the drainage hole 5, and the drainage hole 5 set in each chamber 111 can also support the connection between the inner and outer boxes and increase the structural strength.

[0034] Of course, each of the four chambers 111 in this embodiment has at least one side that is adjacent to the side of the outer box body 12, so the drainage hole 5 can be directly penetrated from the outer surface of the outer box body 12. When the number of chambers 111 is designed to be large, causing some chambers 111 to be surrounded in the middle and unable to be adjacent to the side of the outer box body 12, it is necessary to penetrate the drainage hole 5 from the bottom surface of the outer box body 12.

[0035] The box cover 2 is composed of an inner cover 21 and an outer cover 22. The outer circumference of the inner cover 21 is provided with an inner edge 211 that bends downward and extends, and the outer circumference of the outer cover 2 is provided with an outer edge 221 that bends downward and extends. The inner and outer edges are connected by a groove piece 23 to make the inner and outer covers rotationally molded as one.

[0036] At the same time, the groove sheet 23 is provided with a circle of inwardly concave positioning grooves 231, which are formed by directly concavely forming the bottom surface of the groove sheet 23, and the corresponding annular boss 13 is provided with a circle of outwardly convex positioning protrusions 131, which are formed by directly convexly protruding upwardly from the top surface of the annular boss 13, so the box cover 2 is closed on the annular boss 13, and the positioning protrusion 131 is fitted in the positioning groove 231, so that the groove sheet 23 and the top surface of the annular boss 13 can be positioned tightly.

[0037] A hinge shaft 24 and a hinge seat 14 for forming a hinged installation are respectively provided between the box cover 2 and the annular boss 13. Usually, a single-sided design is adopted. Therefore, the box cover 2 can be opened and closed on one side relative to the annular boss 13 through the hinge shaft 24 and the hinge seat 14 for forming a hinged installation. A plurality of mounting grooves 4 are also provided between the box cover 2 and the annular boss 13. Usually, the plurality of mounting grooves are distributed in a circle, and a lock 3 is provided in each mounting groove 4, so that the closed box cover 2 and the annular boss 13 are locked by the lock to prevent the box cover 2 from being opened.

[0038] An opening groove 132 is provided on the top side of the annular boss 13, which allows a finger to be inserted into the box cover 2 to open it easily. The opening groove 132 is usually designed to be opposite to the hinge structure.

[0039] In addition, the outer surface of the outer box body 12 is provided with a plurality of circumferentially distributed and integrally rotationally molded reinforcement grooves 121, which can be used to enhance the structural strength of the outer box body 12, and the bottom surface of the outer box body 12 is provided with a plurality of integrally rotationally molded support feet 122 for support.

[0040] The top surface of the outer cover 22 is provided with a plurality of top grooves 222 which are parallel to each other and extend axially, that is, extend along the length direction of the rectangular box cover. Each top groove 222 is directly concavely formed by the top surface of the outer cover 22, which can enhance the structural strength of the outer cover 22.

[0041] The utility model fills a double-layer box with PU foam material and combines it with an integrally rotationally molded multi-chamber structure, which not only increases the structural strength of the box body 1, but also has sufficient buffering capacity when the box body is subjected to a large external impact. In particular, the multi-chamber adopts an independent box cover 2 for closing. Even if the volume of the box body increases and the number of chambers increases, the volume of the box cover will not increase or become heavier, thereby avoiding the trouble of adding more auxiliary accessories in the covering structure between the single box cover and the multi-chamber box body in the traditional structure, thereby improving the structural reliability and being more convenient, flexible and labor-saving to use.

[0042] Moreover, the volume of the box cover does not need to be increased, and the flatness of the contact surface with the box cover can be ensured, so that the contact surface can form a close contact, thereby avoiding affecting the airtightness of the packaging box. The original double-layer multi-chamber box body and double-layer box cover can also be integrally formed by rotational molding, which greatly simplifies the production process and improves production efficiency.

[0043] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included in the protection scope of the present invention.

Claims

1. A large-scale multi-chambered plastic airtight packaging box, comprising a box body (1) and a box cover (2) on the top of the box body, characterized in that: The box body (1) is composed of an inner box body (11) and an outer box body (12) which are rotationally molded as one body, and a PU foam material is filled between the inner and outer box bodies; The inner box body (11) is composed of a plurality of chambers (111) connected together as one body, the top of each chamber forms a cavity opening, and the cavity opening at the top of each chamber (111) is covered by an independent box cover (2); A drainage hole (5) is provided on the side or bottom of each chamber (111), the drainage hole passes through the outer box body (12), and the hole wall of the drainage hole (5) is rotationally molded as one with the inner and outer box bodies.

2. A multi-chamber large plastic airtight packaging box according to claim 1, characterized in that An annular boss (13) is provided on the outer circumference of the cavity opening at the top of each chamber (111), and the box cover (2) covers the annular boss (13), thereby sealing the cavity opening.

3. A multi-chamber large plastic airtight packaging box according to claim 2, characterized in that The annular boss (13) is formed by directly protruding upward from the top surface of the inner box body (11).

4. A multi-chamber large plastic airtight packaging box according to claim 2, characterized in that The annular boss (13) is provided with a circle of outwardly protruding positioning protrusions (131), and the positioning protrusions are formed by directly protruding upwards from the top surface of the annular boss (13).

5. A multi-chamber large plastic airtight packaging box according to claim 2, characterized in that A hinge shaft (24) and a hinge seat (14) for hinged installation are respectively provided between the box cover (2) and the annular boss (13), and the box cover (2) is opened and closed relative to the annular boss (13) via the hinge shaft (24) and the hinge seat (14) for hinged installation.

6. A multi-chamber large plastic airtight packaging box according to claim 2, characterized in that A plurality of mounting grooves (4) are provided between the box cover (2) and the annular boss (13), each of the mounting grooves being provided with a lock (3), and the box cover (2) and the annular boss (13) are locked by the lock after they are closed.

7. A multi-chamber large plastic airtight packaging box according to claim 4, characterized in that The box cover (2) is composed of an inner cover (21) and an outer cover (22); the outer circumference of the inner cover (21) is provided with an inner edge (211) that bends downward and extends; the outer circumference of the outer cover (22) is provided with an outer edge (221) that bends downward and extends; the inner and outer edges are connected by a groove sheet (23) so that the inner and outer covers are rotationally molded into one piece.

8. A multi-chamber large plastic airtight packaging box according to claim 7, characterized in that The groove sheet (23) is provided with a circle of inwardly concave positioning grooves (231), which are formed by directly concavely forming the bottom surface of the groove sheet (23); the box cover (2) is covered on the annular boss (13), and the positioning boss (131) is fitted in the positioning groove (231), thereby forming a positioning and close contact between the groove sheet (23) and the top surface of the annular boss (13).

9. The multi-chamber large plastic airtight packaging box according to claim 1, characterized in that The outer surface of the outer box body (12) is provided with a plurality of circumferentially distributed and integrally rotationally molded reinforcement grooves (121), and the bottom surface of the outer box body (12) is provided with a plurality of integrally rotationally molded support feet (122).

10. A multi-chamber large plastic airtight packaging box according to claim 7, characterized in that The top surface of the outer cover (22) is provided with a plurality of top grooves (222), the plurality of top grooves are parallel to each other and extend along the axial direction, and each top groove (222) is formed by directly concavely forming the top surface of the outer cover (22).

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