Packaging folding hollow plate with hot pressing marks

Abstract

The utility model relates to the technical field of packaging hollow plates, in particular to a packaging folding hollow plate with hot pressing marks, which comprises a plate body, a supporting plate is arranged inside the plate body, the supporting plate enables the inside of the plate body to form a hollow structure, and the outer surface of the plate body is extruded by two groups of opposite heating pressing knives to form a plurality of groups of pressing marks. The indentations and the hollow structures are crossed to facilitate folding and rolling of the plate body, the distance between each group of indentations is 5 cm, the thickness of each indentation is 2-5 mm, and the width of each indentation is 5 mm. Through the crossed layout and gradient depth design of the indentations and the hollow structures, a bidirectional enhancement effect is integrally formed, the toughness is remarkably improved while high rigidity is kept, and the service life of the plate body is prolonged. The problems that a traditional hollow plate is prone to breakage and poor in impact resistance when folded are effectively solved. And through the combination of the differentiated design of the hydrophobic coating and the thermal response supporting plate, the synergistic function of rapid flow guiding and local shaping of liquid is achieved, and the risks of weight increase and structural failure caused by additional waterproof layers or connecting pieces are avoided.

Description

Technical Field

[0001] This utility model relates to the field of packaging hollow board technology, specifically a packaging folding hollow board with heat indentation. Background Technology

[0002] Hollow core board is a lightweight, high-strength board material with a hollow internal structure, typically made of plastic or composite materials. It is needed because it significantly reduces weight and cost while maintaining load-bearing and impact resistance, and possesses properties such as moisture resistance and corrosion resistance. Suitable for packaging, construction, advertising, and other fields, it combines functionality and economy.

[0003] However, traditional hollow boards use homogeneous indentation or unidirectional reinforcement structures, which leads to stress concentration when folded. They are also prone to brittleness when the hardness is too high and permanent deformation when the toughness is insufficient. At the same time, conventional waterproof or shaped designs rely on external functional components (such as adhesive waterproof membranes or metal hinges), which not only increases the complexity of the process but also reduces product reliability due to material interface compatibility issues. Utility Model Content

[0004] The purpose of this invention is to provide a folding hollow packaging board with heat indentation to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A heat-pressed folding hollow packaging board includes a board body with a support plate inside. The support plate creates a hollow structure inside the board body. Multiple indentations are formed on the outer surface of the board body by two sets of opposing heated pressure knives. The indentations and the hollow structure are intersected to facilitate folding and rolling of the board body. The spacing between each set of indentations is 5 cm, and the thickness and width of the indentations are 2-5 mm and 5 mm respectively.

[0007] Preferably, the indentation is a wavy or sawtooth structure, which disperses stress through elastic deformation when folded, and automatically rebounds after unfolding to maintain the flatness of the board.

[0008] Preferably, the support plate is a honeycomb or mesh-shaped integrally molded structure, and its edges are directly bonded to the inner wall of the plate through hot melting or molding processes to form a seamless reinforced frame.

[0009] Preferably, the cross-section of the indentation is trapezoidal or semi-circular, and its depth gradually decreases from the outside to the inside, forming a transition buffer area to reduce stress concentration during folding.

[0010] Preferably, the outer surface of the plate is provided with a hydrophobic coating, and the coating thickness in the indented area is less than that in the non-indented area, forming a flow channel to quickly drain liquid or condensate.

[0011] Preferably, the support plate is embedded with a thermally responsive material, which softens locally when heated, allowing for manual bending and shaping, and then re-solidifies and sets after cooling.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This is a type of packaging folding hollow board with heat indentation. Through the cross layout of indentation and hollow structure and the gradient depth design, a bidirectional reinforcement effect is formed in the polypropylene substrate, which significantly improves the toughness of the board while maintaining high rigidity, effectively solving the problems of easy breakage and poor impact resistance of traditional hollow boards when folded.

[0014] 2. This type of packaging folding hollow board with heat indentation achieves the synergistic function of rapid liquid flow and local plasticity through the combination of a hydrophobic coating with a thermally responsive support plate, avoiding the risk of increased weight and structural failure caused by the addition of waterproof layers or connectors in traditional solutions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the planar structure of the plate body of this utility model;

[0017] Figure 3 This utility model Figure 1 Enlarged diagram of point A in the middle.

[0018] In the figure: 101, plate; 102, support plate; 103, hollow structure; 104, indentation; 1011, hydrophobic coating. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-3 As shown, this utility model provides a technical solution:

[0021] A heat-pressed folding hollow packaging board includes a board body 101. A support plate 102 is provided inside the board body 101, which forms a hollow structure 103 inside the board body 101. Multiple indentations 104 are formed on the outer surface of the board body 101 by two sets of opposing heated pressure knives. The indentations 104 and the hollow structure 103 are intersected to facilitate folding and rolling of the board body 101. The spacing between each set of indentations 104 is 5cm, and the thickness and width of the indentations 104 are 2-5mm.

[0022] The above scheme enhances overall rigidity and reduces the weight of the board by forming a hollow structure through the internal support plate. The material mechanical path can be reconstructed by the cross-distribution of multiple sets of indentations on the outer surface and the hollow structure to achieve smooth folding. The quantitative design of 5cm indentation spacing, 2-5mm thickness and 5mm width can precisely control the stress distribution range and ensure uniform stress transmission during folding.

[0023] In this embodiment, preferably, the indentation 104 is a wavy or sawtooth structure, which disperses stress through elastic deformation when folded, and automatically rebounds after unfolding to maintain the flatness of the plate 101.

[0024] The above solutions utilize a wave-shaped or sawtooth-shaped indentation structure to generate elastic deformation during folding, which can disperse localized concentrated stress. The elastic rebound characteristics of the indentation can automatically restore the flatness of the board surface after unfolding. The waveform design of the indentation can increase the deformation allowance to extend the fatigue life.

[0025] In this embodiment, preferably, the support plate 102 is a honeycomb or grid-shaped integrally formed structure, and its edges are directly bonded to the inner wall of the plate body 101 through hot melting or molding processes to form a seamless reinforced frame.

[0026] The above solutions can form a uniformly stressed internal frame by using a honeycomb or grid-like support plate integral molding structure. The hot-melt / molding bonding of the support plate edge with the inner wall of the plate can eliminate interface weakness points to improve overall strength. The seamless connection process can prevent delamination and improve impact resistance.

[0027] In this embodiment, preferably, the cross-section of the indentation 104 is trapezoidal or semi-circular, and its depth gradually decreases from the outside to the inside, forming a transition buffer area to reduce stress concentration during folding.

[0028] The above schemes can form a gradual contact surface by indenting with trapezoidal or semi-circular cross sections to reduce sudden changes in folding stress. A gradual buffer zone can be formed by designing an indentation depth that gradually decreases from the outside to the inside. The combination of cross-sectional shape and depth variation can suppress crack propagation paths.

[0029] In this embodiment, preferably, the outer surface of the plate 101 is provided with a hydrophobic coating 1011, and the coating thickness in the indentation 104 area is less than that in the non-indentation 104 area, forming a flow channel to quickly discharge liquid or condensate.

[0030] The above solutions reduce liquid adhesion and maintain packaging dryness through a hydrophobic coating on the board surface. Differentiated coating thickness in the indentation area creates directional flow channels to accelerate liquid drainage. The combination of the coating and the indentation structure prevents water seepage from affecting structural stability.

[0031] In this embodiment, preferably, the support plate 102 is embedded with a thermally responsive material. When heated, the support plate 102 softens locally, allowing for manual bending and shaping, and then solidifies and sets after cooling.

[0032] The above solution utilizes the thermally responsive material inside the support plate, which softens upon heating, to achieve adaptability to artificial shaping. A stable irregular structure can be formed through the process of local heating followed by cooling and solidification. The thermoforming function can meet the needs of complex packaging shapes without the need for mechanical connection structures.

[0033] In this embodiment, a heat-indented packaging folding hollow board is used. During use, a stable hollow structure 103 is formed by an integrally molded honeycomb or mesh support plate 102 inside the board body 101. The edges of the support plate 102 are seamlessly bonded to the inner wall of the board body 101 through a hot-melt or molding process, ensuring overall rigidity and reducing weight. When folding and rolling are required, multiple sets of indentations 104, pre-formed by two sets of opposing heated pressure knives on the outer surface of the board body 101, come into play. These indentations 104 are distributed in a crisscross pattern with the hollow structure 103, changing the hollow board (PP polypropylene). The oriented molecular direction of polypropylene (PP) creates a multi-directional reinforcing structure within the material: maintaining the inherent high hardness of polypropylene while imparting polyethylene-like toughness through molecular chain recombination at the cross-indentations 104. Simultaneously, the mesh support formed by the cross nodes significantly enhances compressive strength. The indentations 104 are evenly distributed at 5cm intervals, with trapezoidal or semi-circular cross-sections and gradually decreasing depth from the outside to the inside, forming a gradient transition buffer zone that effectively disperses concentrated stress during folding, preventing sheet breakage. The indentations 104 themselves are designed with a wavy or serrated structure, which, during folding... By absorbing stress through elastic deformation and automatically rebounding to restore flatness after unfolding, combined with the micro-protrusion wear-resistant structure generated by the cross-indentation 104, the hollow board possesses multiple folding cycle resistance and excellent surface wear resistance. If the environment contains liquid splashes or condensation, the hydrophobic coating 1011 on the outer surface of the board 101 can quickly guide the liquid. Due to the thin coating thickness in the indentation 104 area, a directional flow channel is formed to accelerate liquid drainage and prevent water accumulation from affecting packaging performance. When the user needs to adjust the shape of the board, the support plate 102 can be locally heated, and the internally embedded thermal response... The material (which can be SEBS-based thermoplastic elastomer (TPE)) softens when heated, allowing for manual bending and shaping. After cooling, it is re-cured and shaped, achieving personalized designs without additional connectors. Throughout the process, the cross-layout of the indentation 104 and the gradient direction correction work together to give the product both the hardness of PP sheets and the toughness of PE materials. Through elastic deformation characteristics and an integrated support structure, it ensures smooth folding operations and fatigue resistance, while maintaining load-bearing strength, pressure and wear resistance, and surface waterproofing properties after unfolding. It also expands the application scenarios for irregularly shaped packaging.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A folding hollow packaging board with heat-pressed indentations, comprising a board body (101), characterized in that: The plate (101) is provided with a support plate (102) inside, and the support plate (102) makes the plate (101) form a hollow structure (103). The outer surface of the plate (101) is pressed by two sets of opposing heating pressure knives to form multiple sets of indentations (104). The indentations (104) and the hollow structure (103) are intersecting to facilitate the folding and rolling of the plate (101). The spacing between each set of indentations (104) is 5cm, and the thickness of the indentation (104) is 2-5mm and the width of the indentation (104) is 5mm.

2. A packaging folding hollow board with hot-pressed marks according to claim 1, characterized in that: The indentation (104) is a wavy or sawtooth structure. When folded, it disperses stress through elastic deformation and automatically rebounds after unfolding to maintain the flatness of the plate (101).

3. A packaging folding hollow board with hot-pressed marks according to claim 1, characterized in that: The support plate (102) is a honeycomb or grid-shaped integral molded structure, and its edge is directly bonded to the inner wall of the plate body (101) through hot melting or molding process to form a seamless reinforced frame.

4. A packaging folding hollow board with hot-pressed marks according to claim 1, characterized in that: The cross-section of the indentation (104) is trapezoidal or semi-circular, and its depth gradually decreases from the outside to the inside, forming a transition buffer area to reduce stress concentration during folding.

5. A folding hollow packaging board with heat indentation according to claim 1, characterized in that: The outer surface of the plate (101) is provided with a hydrophobic coating (1011), and the coating thickness in the indentation (104) area is smaller than that in the non-indentation (104) area, forming a flow channel to quickly discharge liquid or condensate.

6. A packaging folding hollow board with hot score according to claim 1, characterized in that: The support plate (102) is embedded with a thermally responsive material. When heated, the support plate (102) softens locally, allowing for manual bending and shaping. After cooling, it is re-cured and reshaped.

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