CN217754573U - Hollow structural member, container and mold - Google Patents

Abstract

The utility model discloses a cavity structure, container and mould, this cavity structure includes: the laminated plate comprises a first laminated plate and a second laminated plate, wherein the first laminated plate and the second laminated plate are oppositely arranged, the periphery of the first laminated plate is a first periphery, the periphery of the second laminated plate is a second periphery, the first periphery and the second periphery are mutually attached and connected, and at least partial areas of the middle area of the first laminated plate and the middle part of the second laminated plate are mutually separated to form a hollow area; the first periphery and the second periphery extend towards a first direction, and the first direction is a direction from the first layer plate to the second layer plate or a direction from the second layer plate to the first layer plate. Since both the first periphery of the first sheet and the second periphery of the second sheet extend in the first direction, which is the direction from the first sheet to the second sheet or the direction from the second sheet to the first sheet, the first periphery and the second periphery do not extend horizontally along the hollow structural member, and therefore the effective usable area of the container can be increased.

Description

Hollow structural member, container and mold

Technical Field

The embodiment of the utility model provides a relate to the container field, in particular to cavity structure, container and mould.

Background

The turnover container is used as a container for storing or transferring goods and is more and more widely applied in the current times of more and more developed logistics.

The existing turnover container is generally formed by splicing a plurality of hollow structural members, and the upper layer and the lower layer around the hollow structural members are required to be completely connected together in order to prevent liquid and dust from entering the hollow structural members. Currently, a circle of horizontal extension outwards on the side wall around the hollow structural member is mostly adopted for the connection around the hollow structural member. Because such a connection requires a round of outward horizontal extension of the peripheral side walls of the hollow structural member, the effective usable area of the turnaround vessel is reduced.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model aims to provide a cavity structure, container and mould can increase the effective usable floor area of container.

In order to solve the above technical problem, an embodiment of the present invention provides a hollow structural member, which includes: the laminated plate comprises a first laminated plate and a second laminated plate, wherein the first laminated plate and the second laminated plate are oppositely arranged, the periphery of the first laminated plate is a first periphery, the periphery of the second laminated plate is a second periphery, the first periphery and the second periphery are mutually attached and connected, and at least partial areas of the middle areas of the first laminated plate and the middle parts of the second laminated plate are mutually separated to form a hollow area;

wherein the first perimeter and the second perimeter each extend in a first direction, the first direction being a direction from the first ply to the second ply or a direction from the second ply to the first ply.

The utility model discloses embodiment is for prior art, because the first periphery of first plywood and the second periphery of second plywood all extend towards the first direction, this first direction is from the direction of first plywood to second plywood or from the direction of second plywood to first plywood, consequently first periphery and second periphery are not the horizontal extension along hollow structure spare, consequently can improve the effective usable floor area of container.

In one embodiment, the direction perpendicular to the first layer plate and the second layer plate is a second direction, and an included angle between the first direction and the second direction is any angle of 0 to 45 degrees.

In one embodiment, a portion of at least one of the first and second plies near the respective periphery is recessed to form a recessed groove toward a third direction, the third direction being a direction from the first ply to the second ply or a direction from the second ply to the first ply, and the third direction being opposite to the first direction.

In one embodiment, the recessed groove is an annular recessed groove extending along the periphery of the hollow structural member.

In an embodiment, after the portion of the first layer board close to the first periphery and the portion of the second layer board close to the second periphery are attached to each other, the first layer board and the second layer board are both recessed towards the third direction to form the recessed groove.

In one embodiment, a portion of the first ply between the first periphery and the trough bottom of the recessed trough is a first intermediate portion, and a portion of the second ply between the second periphery and the trough bottom of the recessed trough is a second intermediate portion;

the first intermediate portion is located radially outward of the second intermediate portion in a radial direction of the hollow structural member, the first intermediate portion projecting in a direction away from the second intermediate portion;

or, in the radial direction of the hollow structural member, the second intermediate portion is located radially outside the first intermediate portion, and the second intermediate portion protrudes in a direction away from the first intermediate portion.

In an embodiment, the first periphery is bent toward the second layer board, and the first periphery is located outside the periphery of the second layer board, and a portion of the second layer board close to the second periphery is recessed toward a direction from the second layer board to the first layer board to form the recessed groove.

In an embodiment, the recess depth of the recess groove is greater than the sum of the thicknesses of the first and second peripheries.

In one embodiment, the first periphery covers the second periphery, and the outer surface of the first periphery on the side far away from the second periphery is an arc surface;

or the second periphery covers the first periphery, and the outer surface of one side of the second periphery, which is far away from the first periphery, is an arc surface.

In one embodiment, the distance between the first and second perimeters at which the conformable connection is made is greater than the sum of the thicknesses of the first and second perimeters;

and/or a part of the middle part of any one of the first layer plate and the second layer plate is sunken towards the opposite direction until the other layer plate of the first layer plate and the second layer plate is abutted;

and/or the hollow structural part is formed by adopting a double-layer blow molding process;

and/or the hollow structural member is any one of a bottom plate, a cover plate, a bottom support and a bottom foot in the container;

and/or the first periphery and the second periphery are bonded with each other;

and/or the first layer plate and the second layer plate are both plastic plates.

The utility model also provides a container, the container includes:

a base;

the side frame extends upwards from the periphery of the base;

the cover plate is arranged opposite to the base and covers one side of the side frame, which is far away from the base;

wherein, the apron is any one hollow structure spare of above-mentioned.

In one embodiment, the base includes:

a bottom plate supporting the side frame;

the connecting columns are arranged at intervals and extend from one side of the bottom plate, which deviates from the side frame, to the direction far away from the side frame;

the bottom plate is provided with a plurality of connecting columns, each connecting column is arranged on one side of the bottom plate, and each connecting column is connected with at least two connecting columns;

wherein at least one of the bottom plate and the feet is the hollow structural member of one of the above items.

The utility model discloses still provide a volume mould, the mould includes: the inner surface of the first template has the same shape as the outer surface of the first laminate, which is away from the second laminate, and the structure of the inner side of the second template has the same structure as the outer surface of the second laminate, which is away from the first laminate;

wherein the first and second templates are operable to be brought together or separated.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic structural view of a first embodiment of the present invention in which the hollow structural member is a bottom plate;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view at A in FIG. 2;

fig. 4 is a schematic structural view of a hollow structural member as a footing according to a second embodiment of the present invention;

FIG. 5 is a rear view of the foot of a second embodiment of the present invention;

figure 6 is a cross-sectional view of a foot in a second embodiment of the invention;

FIG. 7 is an enlarged view at B in FIG. 6;

fig. 8 is a schematic structural view of a container according to a third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a base in a third embodiment of the present invention.

Description of the reference numerals:

1. a first laminate; 11. a first perimeter; 12. a first intermediate portion; 13. a protrusion; 2. a second laminate; 21. a second perimeter; 22. a second intermediate portion; 3. a hollow zone; a. a first direction; b. a second direction; 4. a recessed groove; 41. the bottom of the tank; 5. a hollow part; 6. a groove; 7. flashing; 101. a base; 1011. a base plate; 1012. connecting columns; 1013. footing; 102. a side frame; 103. and (7) a cover plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will explain in detail each embodiment of the present invention with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solutions of the present invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

The following describes a hollow structural member according to a first embodiment of the present invention with reference to the accompanying drawings, and as shown in fig. 1 to 3, the hollow structural member includes a first laminate 1 and a second laminate 2, and the first laminate 1 and the second laminate 2 are disposed opposite to each other. The periphery of the first layer board 1 is a first periphery 11, the periphery of the second layer board 2 is a second periphery 21, and the first periphery 11 and the second periphery 21 are attached to each other, specifically, in the embodiment, the first periphery 11 and the second periphery 21 are bonded together, and of course, in some embodiments, the first periphery 11 and the second periphery 21 can also be welded together.

The middle part of the first layer plate 1 and the middle part of the second layer plate 2 are partially separated from each other to form a hollow area 3. That is, in some embodiments, the medial portions of the first ply 1 and the medial portions of the second ply 2 are spaced apart completely, forming a large cavity between the first ply 1 and the second ply 2, but in some embodiments, the medial portions of the first ply 1 and the second ply 2 are only partially spaced apart.

In addition, specifically, as shown in fig. 2 to 3, the first periphery 11 and the second periphery 21 both extend in a first direction a, which may be a direction from the first layer board 1 to the second layer board 2 or a direction from the second layer board 2 to the first layer board 1. In the present embodiment, as shown in fig. 1 to 3, the first periphery 11 and the second periphery 21 extend from the second layer board 2 to the first layer board 1, specifically, the hollow structural member in the present embodiment is a bottom board 1011 of the container, the first periphery 11 and the second periphery 21 extend upward, and the second periphery 21 covers the outside of the first periphery 11.

Preferably, as shown in fig. 2 to 3, the direction perpendicular to the first layer board 1 and the second layer board 2 is the second direction b, and the included angle between the first direction a and the second direction b is any one of 0 to 45 degrees, for example, 0 degree (i.e. the direction in which the first periphery 11 and the second periphery 21 extend is completely perpendicular to the first layer board 1 and the second layer board 2), and of course, 20 degrees, 30 degrees or 45 degrees. Of course, in some embodiments, the included angle between the first direction a and the second direction b may be greater than 45 degrees.

In addition, for some hollow structural members (such as trays, bounding wall boxes, cardboard boxes and the like) with severe working environments, the products are often impacted by external force in the using process and even can fall off from a high place directly.

Therefore, as shown in fig. 2 to 3, at least one of the first and second laminate sheets 1 and 2 is recessed toward the third direction at a portion near the respective peripheries to form a recessed groove 4. The third direction is the direction from the first layer plate 1 to the second layer plate 2, but may of course be the direction from the second layer plate 2 to the first layer plate 1, and is opposite to the first direction a described above. Specifically, in the present embodiment, the portion of the first sheet 1 near the first periphery 11 and the portion of the second sheet 2 near the second periphery 21 are recessed toward the third direction after being attached to each other to form the recessed groove 4.

The concave groove 4 can deform inwards when the product bears external force impact or falls from a high position, so that the external force is released, and the side wall is prevented from being broken and damaged.

Preferably, the recess 4 is a ring-shaped recess 4 extending along the periphery of the hollow structural member, but in some embodiments, the recess 4 may not be ring-shaped, but may be a section of the recess 4 extending along the periphery of the hollow structural member. In the present embodiment, as shown in fig. 1, the recessed groove 4 is an annular recessed groove 4.

In the present embodiment, as shown in fig. 8 and 9, the hollow structural member in the present embodiment is a bottom plate 1011 of the container, and the side frame 102 of the container is snapped into the recessed slot 4 of the bottom plate 1011, so that the side frame 102 and the bottom plate 1011 are snapped together. Of course, in some implementations, the recessed groove 4 is not used for mounting other components.

In addition, in the present embodiment, since the side frame 102 is engaged with the concave groove 4, the side wall outside the concave groove 4 is deformed and easily damages the component located in the concave groove 4, and thus, as shown in fig. 2, the portion of the first layer board 1 between the first peripheral edge 11 and the groove bottom 41 of the concave groove 4 is the first intermediate portion 12, and the portion of the second layer board 2 between the second peripheral edge 21 and the groove bottom 41 of the concave groove 4 is the second intermediate portion 22. In some embodiments, the first intermediate portion 12 is located radially outward of the second intermediate portion 22 in a radial direction of the hollow structural member, and the first intermediate portion 12 protrudes away from the second intermediate portion 22, forming a hollow portion 5 between the first intermediate portion 12 and the second intermediate portion 22. Of course, in another embodiment, the second intermediate portion 22 is located radially outside the first intermediate portion 12 in the radial direction of the hollow structural member, the second intermediate portion 22 projecting away from the first intermediate portion 12, and the hollow portion 5 is formed between the first intermediate portion 12 and the second intermediate portion 22. Whereas in the present embodiment the second intermediate portion 22 is located radially outwardly. Thus, when the hollow structural member is subjected to an external impact, the second intermediate portion 22 is deformed inward to release the external impact.

In addition, a part of the middle part of any one of the first layer board 1 and the second layer board 2 is recessed towards the opposite direction until the middle part abuts against the other one of the first layer board 1 and the second layer board 2, and specifically, the two layers can be bonded together, but in some embodiments, the two layers are not bonded with each other. In the present embodiment, as shown in fig. 2, a part of the middle portion of the second layer board 2 is recessed toward the first layer board 1 and is abutted against the first layer board 1, and the recessed part of the second layer board 2 forms a groove 6 on the surface of the second layer board 2, and of course, there may be a plurality of such grooves 6 as required.

In the present embodiment, the first periphery 11 is overlaid on the second periphery 21, and the outer surface 111 of the first periphery 11 on the side away from the second periphery 21 is an arc surface. Thus, the periphery of the hollow structural part is smooth without cutting hands.

Specifically, in this embodiment, the first laminate 1 and the second laminate 2 are formed by a double-layer blow molding process, so that the first laminate 1 and the second laminate 2 are both plastic sheets. The principle of the double-layer plastic uptake forming process is as follows: heating two flat plastic hard sheets to soften, respectively adsorbing the two flat plastic hard sheets on the surfaces of an upper mold and a lower mold by vacuum, then closing the upper mold and the lower mold to enable bonding points of the upper layer and the lower layer to be bonded with each other, and cooling and forming. The formed product is formed by stretching and bonding an upper layer and a lower layer, the interior of the product is of a hollow structure, and a circle of flash 7 on the periphery of the formed product needs to be cut off in a subsequent procedure.

In both the blow molding process and the double-layer plastic molding process, the upper layer and the lower layer around the product are required to be completely adhered. It is thus seen that the bond structure around the product has this critical effect on both quality and lifetime. Therefore, a novel and reliable bonding structure is needed, so that the force can be effectively removed when the product is impacted by external force, and the upper bonding layer and the lower bonding layer are prevented from cracking; meanwhile, the appearance of the product is not affected, and the periphery of the product is smooth and does not cut hands after the peripheral flash 7 is cut off through the subsequent process.

The distance D1 of the fit connection between the first periphery 11 and the second periphery 21 is greater than the sum D2 of the thicknesses of the first periphery 11 and the second periphery 21, and computer simulation and actual production summarization: after the first layer plate 1 and the second layer plate 2 are molded, the flash 7 is generated at the periphery of the product, and the flash 7 is cut off in the subsequent process, because D1 is larger than or equal to D2, when the flash 7 is cut off, a section of the bonding part in front of the first periphery 11 and the second periphery 21 is completely bonded together, the first periphery 11 and the second periphery 21 are not separated due to the cutting off of the flash 7, and the bonding strength of the first layer plate 1 and the second layer plate 2 is ensured.

In addition, it should be noted that in the present embodiment, the hollow structural member is the bottom plate 1011 of the container, but in some embodiments, the hollow structural member may also be the cover plate 103, bottom plate or foot 1013, etc. of the container.

The second embodiment of the present invention also relates to a hollow structural member, which is substantially the same as the first embodiment, and is mainly different in that the first direction a in the first embodiment is a direction from the second laminate 2 to the first laminate 1, and the first direction a in the present embodiment is a direction from the first laminate 1 to the second laminate 2.

The hollow structural member in this embodiment is the bottom foot 1013 of the container.

Specifically, as shown in fig. 4 to 7, in the present embodiment, the first sheet 1 and the second sheet 2 are disposed oppositely, the first periphery 11 and the second periphery 21 extend in a direction from the first sheet 1 to the second sheet 2, and the first direction a substantially coincides with the second direction b.

In addition, as shown in the figure, in the embodiment, the first periphery 11 is bent toward the second layer board 2, the first periphery 11 is located outside the periphery of the second layer board 2, and the portion of the second layer board 2 near the second periphery 21 is recessed toward the direction from the second layer board 2 to the first layer board 1 to form the recessed groove 4. The concave groove 4 can deform inwards when the product bears external force impact or falls from a high position, so that the external force is released, and the side wall is prevented from being broken and damaged.

Further preferably, as shown in fig. 7, the recess depth D3 of the recess groove 4 is larger than the sum D4 of the thicknesses of the first periphery 11 and the second periphery 21. In addition, in the present embodiment, the second periphery 21 covers the first periphery 11, and the outer surface 111 of the second periphery 21 away from the first periphery 11 is an arc surface.

Meanwhile, the concave groove 4 is formed in the side wall of the product, so that when the product is impacted by external force or falls from a high position, the groove wall of the concave groove 4 deforms inwards to release the external force, and the service life of the product is prolonged; meanwhile, when the flash 7 is cut off along the outer side wall of the product in the next procedure, the appearance of the product is not affected, and the periphery of the product is smooth and does not cut hands. In particular, as shown in fig. 7, since the recess depth D3 of the recess groove 4 is greater than the sum D4 of the thicknesses of the first periphery 11 and the second periphery 21, the design is advantageous in that: since the first laminate 1 and the second laminate 2 are formed to generate the flash 7 around the hollow structural member and the flash 7 is cut off in the subsequent process, since D3 is larger than D4, when the flash 7 is cut off, a part of the bonding portion between the first periphery 11 and the second periphery 21 is completely bonded together, and the first periphery 11 and the second periphery 21 of the hollow structural member are not separated due to the cut-off of the flash 7.

The utility model discloses a hollow structural member, skillfully designs the bonding part around the product in the vertical direction of the side wall, which can improve the effective area of the product to the maximum extent; meanwhile, the arched steps are arranged on the peripheral side wall of the product, so that energy can be effectively absorbed and the force can be effectively removed, the product is prevented from being damaged, and the service life of the product is prolonged.

In addition, it should be noted that, in the present embodiment, the hollow structural member is the bottom 1013 of the container, but in other embodiments, the hollow structural member may be other plates, and the shapes of the first layer board 1 and the second layer board 2 may also be adjusted according to actual needs, for example, as shown in fig. 4 and fig. 6, since the hollow structural member in the present embodiment is the bottom 1013, in order to facilitate the connection with the connection column 1012, the middle part of the first layer board 1 protrudes away from the second layer board 2 to form a plurality of protrusions 13, and the connection column 1012 is correspondingly installed on each protrusion 13. Meanwhile, the middle portion of the second laminate 2 is also recessed toward the first laminate 1, and a plurality of grooves 6 are formed in the second laminate 2.

In summary, according to practical situations, the shapes of the first layer board 1 and the second layer board 2 can be adjusted according to practical needs.

A third embodiment of the present invention relates to a container, as shown in fig. 8 and 9, comprising: the base 101, the side frame 102 and the cover plate 103, the side frame 102 extends upwards from the periphery of the base 101. The cover plate 103 is disposed opposite to the base 101 and covers a side of the side frame 102 facing away from the base 101, and specifically, the cover plate 103 may be a hollow structural member in the first embodiment.

In addition, the base 101 includes: a bottom plate 1011, a plurality of connecting posts 1012 and a plurality of feet 1013, wherein the bottom plate 1011 supports the side frame 102. The connecting columns 1012 are spaced from each other, and each connecting column 1012 extends from a side of the bottom plate 1011 away from the side frame 102 to a direction away from the side frame 102. Each of the feet 1013 is disposed on a side of each of the connecting columns 1012 away from the base plate 1011, and each of the feet 1013 is connected to at least two of the connecting columns 1012.

Specifically, base plate 1011 can be a hollow structure as described above in the first embodiment, and foot 1013 can be a hollow structure as described above in the second embodiment.

The utility model discloses the third embodiment relates to a mould, and this mould includes: first and second forms, in particular, because the first layer 1 is formed within the first form, the inner surface of the first form is shaped in the same manner as the outer surface 14 of the first layer 1 facing away from the second layer 2. And since the second laminate 2 is formed in the second template, the shape of the inner surface of the second template is the same as the shape of the outer surface 23 of the second laminate 2 facing away from the second laminate 2. The first and second templates can be moved apart or together.

Specifically, the molding process of the hollow structural member is as follows: the method comprises the steps of firstly separating a first template from a second template, heating and softening two flat plastic hard sheets, respectively adsorbing the two flat plastic hard sheets on the inner surfaces of the first template and the second template by vacuum, then folding the first template and the second template to bond the peripheries of a first layer plate 1 and a second layer plate 2, and cooling and forming. And after the first laminate 1 and the second laminate 2 are cooled and formed, cutting off a circle of flash 7 on the periphery of the hollow structural member.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It is to be understood that, in the above embodiments, there is a connection, and details of related technologies mentioned in one embodiment are still valid in other embodiments, and are not described again in order to reduce repetition.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims (13)

1. A hollow structural member, comprising: the laminated plate comprises a first laminated plate and a second laminated plate, wherein the first laminated plate and the second laminated plate are oppositely arranged, the periphery of the first laminated plate is a first periphery, the periphery of the second laminated plate is a second periphery, the first periphery and the second periphery are mutually attached and connected, and the middle parts of the first laminated plate and the second laminated plate are partially separated from each other to form a hollow area;

wherein the first perimeter and the second perimeter each extend in a first direction, the first direction being a direction from the first ply to the second ply or a direction from the second ply to the first ply.

2. The hollow structural member of claim 1, wherein the direction perpendicular to the first and second plies is a second direction, and the angle between the first and second directions is any angle from 0 to 45 degrees.

3. The hollow structural member according to claim 1, wherein a portion of at least one of the first and second sheets near the respective peripheries is recessed to form a recess groove in a third direction, the third direction being a direction from the first sheet to the second sheet or a direction from the second sheet to the first sheet, and the third direction being opposite to the first direction.

4. The hollow structural member of claim 3, wherein the recessed groove is an annular recessed groove extending along a periphery of the hollow structural member.

5. The hollow structural member of claim 3, wherein the portion of the first sheet adjacent to the first perimeter and the portion of the second sheet adjacent to the second perimeter are both recessed in the third direction to form the recessed channel when the first sheet and the second sheet are attached to each other.

6. The hollow structural member of claim 5 wherein the portion of the first laminate between the first perimeter and the floor of the recessed channel is a first intermediate portion and the portion of the second laminate between the second perimeter and the floor of the recessed channel is a second intermediate portion;

the first intermediate portion is located radially outward of the second intermediate portion in a radial direction of the hollow structural member, the first intermediate portion projecting in a direction away from the second intermediate portion;

or, in the radial direction of the hollow structural member, the second intermediate portion is located radially outside the first intermediate portion, and the second intermediate portion protrudes in a direction away from the first intermediate portion.

7. The hollow structural member of claim 3, wherein the first perimeter is bent toward the second sheet, and the first perimeter is located outside the perimeter of the second sheet, and the portion of the second sheet near the second perimeter is recessed toward the first sheet from the second sheet to form the recessed groove.

8. The hollow structural member of claim 7, wherein the recessed groove has a recess depth greater than the sum of the thicknesses of the first and second peripheral edges.

9. The hollow structural member of claim 1 wherein said first perimeter overlies said second perimeter, an outer surface of said first perimeter on a side remote from said second perimeter being a circular arc;

or the second periphery covers the first periphery, and the outer surface of one side of the second periphery, which is far away from the first periphery, is an arc surface.

10. The hollow structural member of claim 1 wherein the distance of the snug connection between the first and second peripheral edges is greater than the sum of the thicknesses of the first and second peripheral edges;

and/or a part of the middle part of any one of the first laminate and the second laminate is sunken towards the opposite direction until the other laminate abuts against the other laminate;

and/or the hollow structural part is formed by adopting a double-layer blow molding process;

and/or the hollow structural member is any one of a bottom plate, a cover plate, a bottom support and a bottom foot in the container;

and/or the first periphery and the second periphery are bonded with each other;

and/or the first layer plate and the second layer plate are both plastic plates.

11. A container, characterized in that it comprises:

a base;

the side frame extends upwards from the periphery of the base;

the cover plate is arranged opposite to the base and covers one side of the side frame, which is far away from the base;

wherein the cover plate is a hollow structural member as claimed in any one of claims 1 to 9.

12. The container of claim 11, wherein the base comprises:

a bottom plate supporting the side frame;

the connecting columns are arranged at intervals and extend from one side of the bottom plate, which deviates from the side frame, to the direction far away from the side frame;

the bottom plate is provided with a plurality of connecting columns, each connecting column is arranged on one side of the bottom plate, and each connecting column is connected with at least two connecting columns;

wherein at least one of the base plate and the foot is the hollow structural member of any one of claims 1 to 9.

13. A mold, characterized in that the mold comprises: a first template and a second template, the shape of the inner surface of the first template being the same as the shape of the outer surface of the first ply facing away from the second ply in any of claims 1 to 9, and the structure of the inner side of the second template being the same as the structure of the outer surface of the second ply facing away from the first ply in any of claims 1 to 9;

wherein the first and second templates are operable to be brought together or separated.

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