Double-layer hollow plate structure

Abstract

The invention discloses a double-layer hollow plate structure, and relates to the technical field of packaging materials. Comprising a hollow plate, the hollow plate is of a double-layer wall structure, a cavity is formed between the double-layer walls, a plurality of crisscrossed grooves corresponding in position are regularly formed in the two side walls of the hollow plate in a unit mode, and each unit groove is gradually deepened in an arc shape in the depth direction till the unit groove and the corresponding groove in the opposite side are connected together at the intersection point. The arc-shaped grooves which are distributed in a criss-cross mode in the depth direction have the reinforcing effect on the wall faces, the corresponding intersection points of the grooves in the two side walls are connected together, the two walls can be supported, the intersection points of the grooves in the two side walls are connected into a plurality of supporting points to support the whole two wall faces, the grooves in the two wall faces can be reinforced, and the supporting points between the two wall faces can be supported. The board with the hollow interior has high buffering performance and strength, the strength of the board can be adjusted by adjusting the wall thickness, and the board can replace a foam board, a pearl wool board, a honeycomb paperboard and a corrugated board to be used and is wide in application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of packaging materials, in particular to a double-layer hollow plate structure. Background Art

[0002] When transporting household appliances such as refrigerators, washing machines, air conditioners, range hoods, and furniture and cabinets, they are usually protected by foam boards, pearl cotton boards, honeycomb paperboards, and corrugated paperboards to prevent them from being damaged during transportation. However, foam boards, pearl cotton boards, honeycomb paperboards, and corrugated paperboards still have the following serious defects when used:

[0003] Foam board is not environmentally friendly and is brittle, and is easy to break during use. Pearl cotton board has low strength and cannot bear heavy weight. Honeycomb cardboard is easily crushed and not waterproof. Corrugated cardboard consumes a large number of trees, has a complicated processing process, produces a large amount of wastewater that pollutes the environment, and is not waterproof. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-layer hollow plate structure, comprising a hollow plate, wherein the hollow plate is a double-layer wall structure and a cavity is arranged between the double-layer walls, and a plurality of criss-cross grooves are arranged on both side walls of the hollow plate, and the grooves are arc-shaped and deepened toward the interior of the cavity to form an arch shape.

[0005] As a preferred technical solution of the present invention, the positions of the grooves on both sides of the hollow plate correspond to each other.

[0006] As a preferred technical solution of the present invention, a plurality of crisscrossing grooves form a grid.

[0007] As a preferred technical solution of the present invention, the cross section of the groove is V-shaped, U-shaped or arc-shaped, or a combination thereof.

[0008] As a preferred technical solution of the present invention, the arch-shaped groove is recessed into the interior of the cavity to the deepest point where the vertical and horizontal intersections meet.

[0009] As a preferred technical solution of the present invention, the arched grooves on both sides of the hollow plate gradually deepen toward the vertical and horizontal intersection points toward the inside of the cavity until they intersect and connect together at the vertical and horizontal intersection points.

[0010] As a preferred technical solution of the present invention, the crisscross grooves divide the two side walls of the hollow plate into a plurality of unit areas.

[0011] As a preferred technical solution of the present invention, the unit area is in the shape of a square, a circle, a triangle, a rhombus, a polygon, a line, or a combination of two or more thereof.

[0012] As a preferred technical solution of the present invention, the grid-like reinforcement composed of a plurality of crisscross grooves can also be replaced by a large number of blind hole grooves.

[0013] As a preferred technical solution of the present invention, the depth of the arch-shaped groove sunk into the interior of the cavity is one of greater than zero, equal to zero, or less than zero.

[0014] Compared with the prior art, the present invention provides a double-layer hollow plate structure, which has the following beneficial effects:

[0015] The double-layer hollow board structure has arc-shaped grooves in the depth direction that are criss-crossed and distributed, which have a reinforcing effect on the wall surface. The grooves on the two side walls are connected together at the corresponding intersections to support the two walls. Many intersections of the grooves on the two side walls are connected into many supporting points to support the entire two wall surfaces, so that the grooves on the two wall surfaces can be strengthened. The two wall surfaces are supported by many supporting points. The board with a hollow interior has strong cushioning performance and strength, and its strength can be adjusted by adjusting the wall thickness. It can replace foam boards, pearl cotton boards, honeycomb paperboards, and corrugated paperboards, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and enable those skilled in the relevant art to make and use the present disclosure:

[0017] Figure 1 This is a schematic structural diagram of a double-layer hollow plate structure proposed by the present invention;

[0018] Figure 2 This is a structural front view of a double-layer hollow plate structure proposed by the present invention;

[0019] Figure 3 A cross-sectional view of a unit area structure of a double-layer hollow plate structure proposed by the present invention;

[0020] Figure 4 A cross-sectional view of a groove structure of a double-layer hollow plate structure proposed by the present invention;

[0021] Figure 5 A cross-sectional view of a hollow plate structure of a double-layer hollow plate structure proposed by the present invention;

[0022] Figure 6 A schematic diagram of a double-layer hollow plate structure proposed by the present invention, in which a unit area is surrounded by grooves to form a circle;

[0023] Figure 7 This is a schematic diagram of a double-layer hollow plate structure proposed by the present invention, in which the unit area is surrounded by grooves to form a honeycomb shape;

[0024] Figure 8 This is a structural schematic diagram of a second embodiment of a double-layer hollow plate structure proposed by the present invention;

[0025] Fig. 9 A structural side view of a second embodiment of a double-layer hollow plate structure proposed by the present invention;

[0026] Fig.10 A cross-sectional view of the cavity structure of a second embodiment of a double-layer hollow plate structure proposed by the present invention;

[0027] Fig.11 This is a schematic diagram of the unit area structure of a second embodiment of a double-layer hollow plate structure proposed by the present invention;

[0028] Fig.12 This is a cross-sectional view of the groove structure of the second embodiment of a double-layer hollow plate structure proposed by the present invention;

[0029] Fig.13 This is a cross-sectional view of the unit area structure of Example 2 of a double-layer hollow plate structure proposed by the present invention;

[0030] Fig.14 This is a schematic structural diagram of a third embodiment of a double-layer hollow plate structure proposed by the present invention;

[0031] Fig.15 This is a rear view of the structure of the third embodiment of a double-layer hollow plate structure proposed by the present invention;

[0032] Fig.16 A schematic diagram of a groove structure of a third embodiment of a double-layer hollow plate structure proposed by the present invention;

[0033] Fig.17 This is a cross-sectional view of the structure of the unit area of ​​a third embodiment of a double-layer hollow plate structure proposed by the present invention;

[0034] Fig.18 This is a cross-sectional view of the groove structure of Example 3 of a double-layer hollow plate structure proposed by the present invention;

[0035] Fig.19 This is a cross-sectional view of the cavity structure of Example 3 of a double-layer hollow plate structure proposed by the present invention.

[0036] In the figure: 1, hollow plate; 11, cavity; 12, groove; 13, unit area.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] See also Figure 1-7 A double-layer hollow plate structure includes a hollow plate 1, the hollow plate 1 is a double-wall structure and a cavity 11 is arranged between the double walls, and a plurality of criss-cross grooves 12 are arranged on both side walls of the hollow plate 1, and the grooves 12 are arc-shaped and deepened toward the inner direction of the cavity 11 to form an arch shape.

[0041] As a specific technical solution of this embodiment, the positions of the grooves 12 on both sides of the hollow plate 1 correspond to each other, and the positions of the grooves 12 distributed on the inner and outer side walls of the hollow plate 1 correspond to each other. The depression of the grooves 12 makes the distance there the shortest. During blow molding, the wall thickness is thick at the place with a short distance, so that the wall thickness at the grooves 12 is the thickest and the strength is the strongest, just like a layer of staggered support skeleton connected together in a double-layer plate. When the wall is extruded, the contact distance between the inner and outer wall grooves 12 is the shortest, thereby generating the shortest impedance time and the strongest impedance to the impact of external force. Moreover, this corresponding distribution is easy to process and beautiful, which brings convenience to subsequent processing and use.

[0042] As a specific technical solution of this embodiment, a plurality of criss-crossed grooves 12 form a grid shape, and the cross-section of the grooves 12 is one of V-shaped, U-shaped or arc-shaped or a combination thereof. The grooves 12 are interwoven into a network, dividing the entire large area of ​​the wall into a large number of small units, thereby greatly increasing the wall strength. In this way, the required strength can be achieved and the wall thickness can be greatly reduced, thereby greatly reducing materials, reducing weight, saving material costs, and saving transportation costs.

[0043] As a specific technical solution of this embodiment, the arched groove 12 is recessed into the cavity 11 to the deepest point at the intersection of the vertical and horizontal directions, and the arched grooves 12 on both sides of the hollow plate 1 gradually deepen toward the direction of the vertical and horizontal intersections toward the inside of the cavity 11 until they intersect and connect at the vertical and horizontal intersections. The grooves 12 are wavy or arched in the depth direction. This structure is just like the principle of an arch bridge. When the wall is impacted by external force, the arched groove 12 can transmit the external force to the supporting point to achieve a good shock absorption effect. At the same time, the arched groove 12 makes the inner and outer walls except for the intersection. Except for being connected together at the points, other places are not connected together, so that the blowing gas can pass through, thereby ensuring that the hollow plate 1 can be blow-molded, and ensuring that the inner and outer walls are not bonded together, which greatly increases the strength and improves the molding performance. The inner and outer walls are connected together at the intersection of the grooves 12, which can play the role of supporting points for the inner and outer walls. The intersections of many inner and outer wall grooves 12 are connected into many supporting points to support the entire two wall surfaces, so that the inner and outer walls are supported and strengthened, so as to achieve the required strength. This structure can further reduce the wall thickness, save materials and reduce weight.

[0044] As a specific technical solution of this embodiment, the criss-cross grooves 12 divide the two side walls of the hollow board 1 into a number of unit areas 13, and the unit areas 13 are in the shape of a square, a circle, a triangle, a rhombus, a polygon, or a line, or a combination of two or more thereof. A square, a circle, a triangle, a rhombus, a polygon, or a line may be provided in the plane of the unit area 13 surrounded by the grooves 12, and different patterns of the grooves 12 may produce different distributions of the grooves 12, so that the density of the grooves 12 and the arrangement direction of the grooves 12 may change to cope with different usage scenarios. For example, when the hollow board 1 needs to be bent, a linear pattern groove 12 may be used. If better surface strength is required, it may be provided as a regular hexagonal honeycomb curve that is not easy to bend; different patterns may be provided in the plane of the unit area 13 surrounded by the grooves 12, and the plane may be strengthened or decorated.

[0045] As a specific technical solution of this embodiment, the material of the hollow plate 1 is PP, PE or nylon, etc., and is blow-molded using plastics such as PP, PE, nylon or other materials with equal effects and easy to blow-mold. The feed port mold uses a wall thickness controller to control the uniformity of the wall thickness, and large-scale blow molding equipment (up to several meters in length and width) is used to blow-mold into a double-layer hollow structural plate with uniform wall thickness of commonly used specifications and sizes.

[0046] As a specific technical solution of this embodiment, the hollow plate 1 is formed by blow molding or rotational molding. By adjusting the blow molding die and controlling the wall thickness of the wall thickness controller, hollow plates 1 with various wall thicknesses and strengths can be obtained without re-opening the mold or changing the blow molding mold to cope with scenarios with different strength requirements, which greatly simplifies the processing tooling equipment and the processing process, and has great economic benefits. During the rotational molding process, plastic particles are first put into the mold cavity of the rotational molding machine, and the plastic particles are gradually melted, thinned and attached to the mold cavity through heating, rotation, pressurized blowing and stretching processes, and a hollow plate 1 is formed after cooling. Rotational molding can produce large-sized hollow plates 1, which can supplement large-sized processing that cannot be completed by blow molding.

[0047] As a specific technical solution of this embodiment, the grid-like reinforcement composed of a plurality of criss-cross grooves 12 can also be replaced by a large number of blind hole grooves.

[0048] As a specific technical solution of this embodiment, the depth of the arch-shaped groove 12 sunken into the interior of the cavity 11 is greater than zero, equal to zero, or less than zero, and some grooves can be selectively deepened or shallower or cancelled, and the strength and cushioning performance of the hollow board can be adjusted to meet different application requirements of the softness and strength of the hollow board.

[0049] Embodiment 2:

[0050] See also Figure 8-13 A double-layer hollow plate structure includes a hollow plate 1, wherein the hollow plate 1 is a double-wall structure and a cavity 11 is arranged between the double walls, and a plurality of criss-cross grooves 12 are arranged on one side wall of the hollow plate 1, wherein the grooves 12 are arc-shaped and deepen toward the interior of the cavity 11 to form an arch shape.

[0051] As a specific technical solution of this embodiment, a plurality of crisscrossing grooves 12 form a grid shape.

[0052] In this embodiment, the grooves 12 are interwoven into a network, dividing the entire large area of ​​the wall into numerous small units, thereby greatly increasing the wall strength. In this way, the wall thickness can be greatly reduced to achieve the required strength, thereby greatly reducing materials, reducing weight, saving material costs, and saving transportation costs.

[0053] As a specific technical solution of this embodiment, the cross section of the groove 12 is V-shaped, U-shaped or arc-shaped, or a combination thereof.

[0054] As a specific technical solution of this embodiment, the arch-shaped groove 12 is recessed into the cavity 11 to the deepest point where the vertical and horizontal intersections meet.

[0055] As a specific technical solution of this embodiment, the arched groove 12 on one side of the hollow plate 1 gradually deepens toward the inside of the cavity 11 in the direction of the vertical and horizontal intersection until it contacts and connects with the other side wall of the hollow plate 1.

[0056] In the present embodiment, the groove 12 is arch-shaped in the depth direction. This structure is just like the principle of an arch bridge. When the wall surface is impacted by external force, the arch-shaped groove 12 can transmit the external force to the supporting point, thereby achieving a good shock-absorbing effect. The two side walls are connected together at the intersection of the groove 12, which can play the role of supporting points of the two side walls. The intersections of many grooves 12 on the two side walls are connected into many supporting points to support the entire two wall surfaces, thereby strengthening the support between the two side walls, thereby achieving the required strength. This structure can further reduce the wall thickness, save materials, and reduce weight.

[0057] As a specific technical solution of this embodiment, the criss-crossed grooves 12 divide one side wall of the hollow plate 1 into a plurality of unit areas 13 .

[0058] As a specific technical solution of this embodiment, the unit area 13 is in the shape of a square, a circle, a triangle, a rhombus, a polygon, or a line, or a combination of two or more thereof.

[0059] In this embodiment, different patterns of the grooves 12 will produce different distributions of the grooves 12, so that the density of the grooves 12 and the arrangement direction of the grooves 12 will change to cope with different usage scenarios. For example, when the hollow board 1 needs to be bent, a straight pattern groove 12 can be used. If better surface strength is required, it can be set to a regular hexagonal honeycomb curve that is not easy to bend, etc.; and different patterns are set in the plane of the unit area 13 surrounded by the grooves 12, so that the plane can be strengthened or decorated. The hollow board 1 is formed by blow molding or rotational molding.

[0060] Compared with the above-mentioned embodiment, the hollow plate 1 in this embodiment has a plurality of criss-cross grooves 12 only on one side wall. Through this structure, the criss-cross grooves 12 on one side wall have a reinforcing effect on the wall surface. The grooves 12 deepen in an arc shape toward the inside of the cavity until they are connected together at the intersection of the other side wall to support the two side walls. The intersections of the grooves 12 between the many side walls are connected into a large number of support points to support the entire two wall surfaces, so that the grooves 12 on the two wall surfaces can be strengthened. The two wall surfaces are supported by many support points, and the internal hollow plate has light weight and high strength, which greatly saves materials and reduces manufacturing costs.

[0061] Embodiment three:

[0062] See also Figure 14-19A double-layer hollow plate structure includes a hollow plate 1, the hollow plate 1 is a double-wall structure and a cavity 11 is arranged between the double walls, a plurality of grooves 12 are arranged on one side wall of the hollow plate 1, the grooves 12 are segmented and each segment is arc-shaped and deepened toward the inside of the cavity at both ends to form an arch shape.

[0063] As a specific technical solution of this embodiment, the intersection of the two sections of the groove 12 is the deepest and is connected to the other side wall of the hollow plate 1 at the intersection.

[0064] In the present embodiment, the groove 12 is arched in the depth direction. This structure is just like the principle of an arch bridge. When the wall surface is impacted by external force, the arched groove 12 can transmit the external force to the supporting point, thereby achieving a good shock absorbing effect. The two side walls are connected together at the intersection of the groove 12, which can play the role of supporting points of the two side walls. The intersections of the grooves 12 on the two side walls are connected into a large number of supporting points to support the entire two wall surfaces, thereby strengthening the support between the two side walls. This structural design strengthens the two side walls while ensuring that the internal hollow cavity is formed, which can meet the gas flow during blow molding and obtain good cushioning performance. In this way, the required strength is achieved. This structure can further reduce the wall thickness, save materials, and reduce weight.

[0065] As a specific technical solution of this embodiment, the grooves 12 on the wall surface of one side of the hollow plate 1 can be distributed in a straight line, or in a broken line or a curve.

[0066] In this embodiment, the grooves 12 are distributed in different shapes, so that the density of the grooves 12 and the arrangement direction of the grooves 12 change to cope with different usage scenarios. For example, when the hollow plate 4 needs to be bent, a linear distribution groove 12 can be used. If better surface strength is required, it can be set to a broken line or curve distribution that is not easy to bend.

[0067] As a specific technical solution of this embodiment, the cross section of the groove 12 is V-shaped, U-shaped or arc-shaped, or a combination thereof.

[0068] As a specific technical solution of this embodiment, a plurality of grooves 12 divide a side wall of the hollow plate 1 into a plurality of unit areas 13 .

[0069] In this embodiment, a large number of grooves 12 are arranged on the wall surface of one side of the hollow plate 1. The grooves 12 divide the entire large area of ​​the wall surface into a large number of small units, thereby greatly increasing the wall strength. In this way, the wall thickness can be greatly reduced to achieve the required strength, thereby greatly reducing materials, reducing weight, saving material costs, and saving transportation costs. The hollow plate 1 is formed by blow molding or rotational molding, which is the same as the molding process in the above embodiment.

[0070] Compared with the above-mentioned embodiments, the grooves 12 on one side wall of the hollow plate 1 in this embodiment are arranged longitudinally or transversely, and the grooves 12 distributed on one side wall have a reinforcing effect on the wall surface. The grooves 12 deepen in an arc shape toward the inside of the cavity 11 until they are connected together at the other side wall at the intersection, which can support the two side walls. The intersections of the numerous grooves 12 between the two side walls are connected into numerous support points to support the entire two wall surfaces, so that the wall grooves 12 can be strengthened, and the two wall surfaces are supported by numerous support points. The hollow plate inside is light in weight and strong in strength, which greatly saves materials.

[0071] To sum up, the double-layer hollow board structure and the criss-cross distributed grooves 12 have a reinforcing effect on the wall surface. The corresponding intersections of the grooves 12 on the inner and outer side walls of the hollow board 1 are connected together, which can support the inner and outer walls. The intersections of many inner and outer wall grooves 12 are connected into many supporting points to support the entire two wall surfaces, which can be strengthened by the grooves 12 on the two wall surfaces. The two wall surfaces are supported by many supporting points. The internal hollow board is light in weight and strong in strength, which greatly saves materials and has strong cushioning performance and strength. The wall thickness can be conveniently adjusted to adjust the cushioning performance and strength without re-opening the mold. It can replace foam board, pearl cotton board, honeycomb paperboard, and can also be used instead of corrugated paperboard. It has a recyclable function, improves economic benefits, and has broad application prospects.

[0072] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer hollow plate structure, comprising a hollow plate (1), characterized in that: The hollow plate (1) is a double-wall structure and a cavity (11) is provided between the double-walls. A plurality of crisscrossing grooves (12) are provided on both side walls of the hollow plate (1), and the grooves (12) are arc-shaped and deepen toward the inside of the cavity (11) to form an arch shape.

2. A double-layer hollow plate structure according to claim 1, characterized in that: The positions of the grooves (12) on both sides of the hollow plate (1) correspond to each other.

3. The double-layer hollow plate structure according to claim 1, characterized in that: A plurality of crisscross grooves (12) form a grid shape.

4. The double-layer hollow plate structure according to claim 1, characterized in that: The cross section of the groove (12) is V-shaped, U-shaped or arc-shaped, or a combination thereof.

5. The double-layer hollow plate structure according to claim 1, characterized in that: The arch-shaped groove (12) is sunken into the cavity (11) to the deepest point where the vertical and horizontal intersections are located.

6. The double-layer hollow plate structure according to claim 1, characterized in that: The arch-shaped grooves (12) on both sides of the hollow plate (1) gradually deepen towards the vertical and horizontal intersection points and towards the inside of the cavity (11) until they intersect and connect together at the vertical and horizontal intersection points.

7. The double-layer hollow plate structure according to claim 1, characterized in that: The crisscross grooves (12) divide the two side walls of the hollow plate (1) into a plurality of unit areas (13).

8. The double-layer hollow plate structure according to claim 7, characterized in that: The unit area (13) is in the shape of one of square, circle, triangle, rhombus, polygon and line, or a combination of two or more of the above.

9. The double-layer hollow plate structure according to claim 1, characterized in that: The depth of the arch-shaped groove (12) recessed into the cavity (11) is one of greater than zero, equal to zero, or less than zero.

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