Compression-resistant environment-friendly corrugated paper box

Abstract

The utility model relates to the technical field of packaging engineering equipment, in particular to a compression-resistant environment-friendly corrugated paper box which comprises a paper box shell, a supporting assembly is arranged at the bottom of the paper box shell, and a paper box top cover is movably installed on the top of the paper box shell. Through the arrangement of the paper box base, the supporting cylinder, the fence paperboard, the cylindrical paperboard and other components in the supporting assembly, the supporting cylinder can uniformly disperse vertical pressure through a conical cylinder wall structure by means of the orthogonal corrugated structure matching relation of the supporting cylinder and the fence paperboard; the fence paperboard buffers lateral pressure through the three orthogonal corrugated layers, and then the effect that the device can conduct all-directional compression resistance protection on borne goods through the three-dimensional supporting structure is achieved. And meanwhile, the arc-shaped clamping grooves of the limiting paperboards are accurately matched with the cylindrical paperboards, so that the cargoes can be effectively prevented from displacing in the transportation process, and the stability of the packaging structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of packaging engineering equipment technology, and in particular to a pressure-resistant and environmentally friendly corrugated cardboard box. Background Technology

[0002] In the packaging industry, traditional corrugated cardboard boxes are widely used, but with the increasing complexity of transportation environments and rising environmental awareness, their drawbacks are becoming increasingly apparent. Ordinary corrugated cardboard boxes have limited compressive strength; when stacked or subjected to external impacts, they are prone to deformation and damage, resulting in damage to the contents, especially for fragile or valuable items. At the same time, increasingly stringent environmental requirements mean that traditional cardboard boxes, if not designed with sustainability in mind in terms of materials and structure, can easily lead to resource waste and environmental pollution. Therefore, developing a corrugated cardboard box that possesses both good compressive strength and meets environmental standards has become a critical issue that the packaging industry urgently needs to address.

[0003] A search revealed Chinese Patent Publication No. CN222203355U, which discloses a pressure-resistant and environmentally friendly corrugated cardboard box, relating to the field of corrugated cardboard box technology. The box includes: a box body with an opening at the top; a top cover on the top of the box body; an insert plate adapted to the opening at the bottom of the top cover; claws fixedly connected to the side of the top cover; a waterproof box fixedly connected to the bottom of the box body; a handle hole on the upper part of the side wall of the box body; and a fixing groove in the middle of the long side of the box body, within which a pressure-resistant component is fixedly connected. The waterproof box increases the overall waterproof performance of the bottom; the pressure-resistant component improves the overall pressure resistance; the opening allows ropes to pass through for easy securing of internal items; and the claws, top cover, and insert plate facilitate closing and sealing for packaging.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: The pressure-resistant components of these devices are mostly single-structure designs, making it difficult to achieve uniform stress distribution. When the cardboard box is subjected to external pressure, localized stress concentration can easily lead to the failure of the supporting structure. The waterproof boxes used are mostly made of plastic, which, while waterproof, does not conform to the trend of green packaging. The fit between the clips and the embedded plate is prone to loosening after long-term use, affecting the sealing performance. The pressure-resistant components are mostly fixed structures, making it difficult to adapt to contents of different sizes. Utility Model Content

[0005] To overcome the technical defects of existing technologies, this utility model provides a pressure-resistant and environmentally friendly corrugated cardboard box.

[0006] The technical solution adopted by this utility model is: a pressure-resistant and environmentally friendly corrugated cardboard box, including a cardboard box shell, a support component at the bottom of the cardboard box shell, and a cardboard box top cover movably installed on the top of the cardboard box shell; the support component includes a cardboard box base, a support cylinder, a guardrail cardboard, a limiting cardboard, and a cylindrical cardboard. The cardboard box base is fixedly connected to the bottom of the cardboard box shell, the support cylinder is fixedly connected to the center of the top of the cardboard box base, the guardrail cardboard is fixedly connected to the top edge of the cardboard box base, multiple inwardly protruding limiting cardboards are evenly distributed on the inner side of the guardrail cardboard, and a cylindrical cardboard is fixedly installed between the limiting cardboard and the guardrail cardboard, with the lower end of the cylindrical cardboard fixedly connected to the top of the cardboard box base. The multi-layer composite support structure forms a three-dimensional support system, and the support cylinder and the honeycomb paper core work together to effectively disperse vertical pressure by more than 90%.

[0007] Preferably, the support assembly further includes an adhesive layer and locking posts. The adhesive layer is uniformly coated on the overlapping joints of the perimeter cardboard, and the locking posts are fixedly connected to the bottom center of the cardboard box top cover, and the locking posts are movably fitted into the internal cavity of the cylindrical cardboard. The environmentally friendly starch adhesive layer and the self-locking locking post design achieve nail-free assembly, ensuring structural stability while improving the convenience of disassembly and recycling.

[0008] Preferably, the limiting cardboard is a corrugated paper component with an arc-shaped bending structure, the bending arc of which is adapted to the outer wall of the cylindrical cardboard, and the top of the limiting cardboard is provided with an arc-shaped groove that matches the diameter of the cylindrical cardboard. The biomimetic arc-shaped structure, combined with the positioning flange, makes the stress distribution more uniform and improves the lateral impact resistance by 40%.

[0009] Preferably, the fence board is composed of at least three layers of vertically arranged corrugated cardboard, with the flute directions of each layer orthogonally distributed. The height of the fence board is 2 / 3 of the total height of the carton shell. The orthogonal flute lamination structure increases the lateral bending strength to 3.2 times that of a traditional single layer, while reducing material usage by 15%.

[0010] Preferably, the wall thickness of the supporting cylinder decreases from bottom to top, forming a conical structure. Its bottom diameter is equal to the diameter of the central opening in the cardboard box base. The outer surface of the supporting cylinder has a positioning flange that matches the inner diameter of the cylindrical cardboard. The gradual wall thickness design matches the pressure transmission path, and the top thinning treatment reduces the overall weight while maintaining support efficiency.

[0011] Preferably, the locking post is a hollow cylindrical structure with spirally distributed reinforcing ribs on its outer wall. The lower end of the locking post extends to form a conical guide portion, the taper of which matches the taper of the inner wall of the cylindrical cardboard. The spiral reinforcing ribs and the conical guide portion work together to ensure precise positioning of the cover and improve torsional resistance by 50%.

[0012] Preferably, the inner edge of the cardboard box top cover is provided with an annular sealing strip. The sealing strip has a trapezoidal cross-section and is made of biodegradable EPE foam. The sealing strip forms an interference fit with the top of the perimeter cardboard. The EPE foam sealing strip forms a double protective interface, improving moisture resistance by 80% while maintaining environmentally friendly compostable characteristics.

[0013] Preferably, the cylindrical paperboard is filled with a honeycomb paper core structure, wherein the cell diameter of the honeycomb paper core is 3-5 mm, and its arrangement direction is perpendicular to the axis of the cylindrical paperboard. The axially perpendicular honeycomb core layer achieves anisotropic reinforcement, and the longitudinal compressive strength reaches more than 28 MPa.

[0014] Preferably, the bottom surface of the cardboard box base is provided with an anti-slip textured layer, which is composed of staggered wave-shaped protrusions with a spacing of 5-8 mm between adjacent protrusions and a protrusion height of 1-2 mm. The biomimetic wave pattern design increases the static friction coefficient to 0.85, effectively preventing sliding and displacement during transportation.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model, through the inclusion of components such as a cardboard box base, a supporting cylinder, a perimeter corrugated cardboard, and a cylindrical cardboard in its support assembly, utilizes the orthogonal corrugated structure of the supporting cylinder and the perimeter corrugated cardboard. This allows the supporting cylinder to evenly distribute vertical pressure through its conical wall structure, while the perimeter corrugated cardboard, with its three layers of orthogonal corrugated material, buffers lateral pressure. Thus, the device achieves comprehensive pressure protection for the carried goods through a three-dimensional support structure. Simultaneously, the precise fit between the arc-shaped groove of the limiting cardboard and the cylindrical cardboard effectively prevents displacement of the goods during transportation, enhancing the stability of the packaging structure.

[0017] 2. This utility model, by incorporating components such as an adhesive layer, retaining posts, and a honeycomb paper core, utilizes the spiral reinforcing ribs of the retaining posts and the cylindrical cardboard to guide and position the top cover closure via a conical guide section. The adhesive layer reinforces and seals the enclosure cardboard through overlapping joints, thereby achieving a pressure-resistant and sealed internal space through structural mechanics optimization. The honeycomb paper core filling structure reduces weight while increasing the axial compressive strength of the cylindrical cardboard. Combined with the interference seal design of the biodegradable sealing strip, it achieves a dual improvement in environmental performance and structural strength. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partial structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the main structure of the support component of this utility model;

[0021] Figure 4 This is a partial structural diagram of the support component of this utility model;

[0022] Figure 5 This is a schematic diagram of a partial structure installation of the support component of this utility model;

[0023] Explanation of reference numerals in the attached drawings: 1. Outer shell of the cardboard box; 2. Top cover of the cardboard box; 3. Support component; 301. Base of the cardboard box; 302. Support cylinder; 303. Enclosure cardboard; 304. Limiting cardboard; 305. Cylindrical cardboard; 306. Adhesive layer; 307. Locking post. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figures 1 to 5 As shown, this embodiment provides a pressure-resistant and environmentally friendly corrugated cardboard box, including a cardboard box shell 1. A support component 3 is provided at the bottom of the cardboard box shell 1, and a cardboard box top cover 2 is movably installed on the top of the cardboard box shell 1. The support component 3 includes a cardboard box base 301, a support cylinder 302, a guardrail cardboard 303, a limiting cardboard 304, and a cylindrical cardboard 305. The cardboard box base 301 is fixedly connected to the bottom of the cardboard box shell 1. The support cylinder 302 is fixedly connected to the center of the top of the cardboard box base 301. The guardrail cardboard 303 is fixedly connected to the top edge of the cardboard box base 301. Multiple inwardly protruding limiting cardboards 304 are evenly distributed on the inner side of the guardrail cardboard 303. A cylindrical cardboard 305 is fixedly installed between the limiting cardboard 304 and the guardrail cardboard 303. The lower end of the cylindrical cardboard 305 is fixedly connected to the top of the cardboard box base 301. The support cylinder 302 adopts a gradually thickened wall design, with a thickened bottom to concentrate the longitudinal pressure and a thinner top to reduce the overall weight. The combination of the guardrail cardboard 303 and the limiting cardboard 304 forms a multi-point support system. The arc-shaped bending structure of the limiting cardboard 304 radially constrains the cylindrical cardboard 305, preventing lateral displacement under pressure. The cylindrical cardboard 305 serves as the core load-bearing column, and its internal cavity, in conjunction with the locking post 307, forms an axial force transmission path, which can evenly distribute the top load to the cardboard box base 301.

[0026] The support component 3 also includes an adhesive layer 306 and a retaining post 307. The adhesive layer 306 is uniformly coated on the overlapping joint of the fence cardboard 303. The retaining post 307 is fixedly connected to the bottom center of the top cover 2 of the carton and is movably fitted into the internal cavity of the cylindrical cardboard 305. The adhesive layer 306 uses a bio-based water-soluble adhesive, which ensures interlayer bonding strength and meets environmental protection requirements. The spiral reinforcing rib design of the retaining post 307 can improve torsional stiffness and prevent structural deformation caused by rotational friction when the top cover is closed. The fitting gap between the retaining post 307 and the cylindrical cardboard 305 is controlled within the range of 0.5-1mm to ensure guiding accuracy while allowing for thermal expansion and contraction deformation. The self-centering function of the tapered guide simplifies the assembly process and improves production line efficiency.

[0027] The limiting cardboard 304 is a corrugated paper component with an arc-shaped bending structure. Its bending radius matches the outer wall of the cylindrical cardboard 305. The top of the limiting cardboard 304 has an arc-shaped groove that matches the diameter of the cylindrical cardboard 305. The arc-shaped bending of the limiting cardboard 304 is formed using a die-cutting and creasing process, with a bending radius error of ≤0.2mm compared to the outer diameter of the cylindrical cardboard 305, achieving surface contact fixation. The top arc-shaped groove design includes a 3° angled hook structure, forming a mechanical interlock with the outer wall of the cylindrical cardboard 305, and achieving double fixation with environmentally friendly adhesive. The C-shaped flutes of the corrugated paper are arranged along the bending axis, fully utilizing the bending resistance of the corrugated structure.

[0028] The guardrail cardboard 303 is composed of at least three layers of vertically arranged corrugated cardboard, with the flute directions of each layer orthogonally distributed. The height of the guardrail cardboard 303 is 2 / 3 of the total height of the outer shell 1. The three-layer orthogonal structure of the guardrail cardboard 303 includes combinations of three flute types: B-flute (3mm), E-flute (1.5mm), and F-flute (0.8mm), respectively addressing the requirements for vertical pressure, lateral impact, and surface abrasion resistance. The 2 / 3 height design ensures support strength while reserving 15-20mm of buffer space for goods on top. The layers are connected by serrated interlocking joints, improving interlayer shear strength by 40% compared to traditional flat bonding.

[0029] The wall thickness of the supporting cylinder 302 decreases from bottom to top, forming a tapered structure. Its bottom diameter is equal to the diameter of the central opening in the cardboard base 301. The outer surface of the supporting cylinder 302 has positioning flanges that match the inner diameter of the cylindrical cardboard 305. The taper of the supporting cylinder 302 is controlled at 1:12 (vertical height to diameter ratio), conforming to the optimal compressive curvature of a columnar structure. The positioning flanges adopt an intermittent ring array design, with 3mm protrusions every 120°, ensuring assembly guidance while avoiding material waste. The bottom and the cardboard base 301 use an embedded insertion structure, with 8 sets of triangular reinforcing ribs on the contact surface, significantly improving the peel strength of the joint.

[0030] The retaining post 307 is a hollow cylindrical structure with spirally distributed reinforcing ribs on its outer wall. The lower end of the retaining post 307 extends to form a conical guide section, the taper of which matches the inner wall taper of the cylindrical cardboard 305. The spiral reinforcing ribs of the retaining post 307 are arranged equidistantly at 45° angles, with a rib height 1.2 times the wall thickness, effectively improving circumferential stiffness. A cross-shaped support frame is installed inside the hollow structure, increasing the axial compressive strength to 85% of that of a solid structure while reducing weight by 60%. The conical guide section adopts a graded transition design, with an upper cone angle of 15° for rapid coarse positioning and a lower cone angle of 5° for precise alignment.

[0031] The inner edge of the cardboard box top cover 2 is equipped with an annular sealing strip. The sealing strip has a trapezoidal cross-section and is made of biodegradable EPE foam. The sealing strip forms an interference fit with the top of the guardrail cardboard 303. The trapezoidal cross-section design of the annular sealing strip (3mm at the top / 5mm at the bottom / 4mm in height) creates a progressive compression contact surface, generating 3-5 N / cm² with an interference fit of 0.5-0.8mm. 2 Contact pressure. The density of EPE foam material is controlled at 28-32 kg / m³. 3 It features a 60% compression resilience and a >90% closed-cell rate, effectively preventing water vapor penetration. A V-shaped guide groove at the bottom of the sealing strip directs condensate to the outside of the fence cardboard 303.

[0032] The cylindrical paperboard 305 is internally filled with a honeycomb paper core structure. The cell diameter of the honeycomb paper core is 3-5 mm, and its arrangement direction is perpendicular to the axis of the cylindrical paperboard 305. The honeycomb paper core adopts a regular hexagonal cell structure, and the cell diameter gradient distribution (4 mm at the bottom / 3 mm at the top) matches the axial pressure gradient. The arrangement direction of the paper core is perpendicular to the axis, which increases the radial compressive strength to 2.3 times that of the longitudinal strength. A 0.2 mm buffer gap is set between the core and the tube wall, filled with starch-based foamed particles, which dissipate energy through particle displacement during impact.

[0033] The bottom surface of the cardboard box base 301 features an anti-slip textured layer composed of staggered, wavy protrusions. The spacing between adjacent protrusions is 5-8 mm, and the protrusion height is 1-2 mm. The wavy protrusions of the anti-slip textured layer employ an asymmetrical toothed design, with a tooth pitch of 6 mm / tooth height in the forward direction and a tooth pitch of 8 mm / tooth height of 2 mm in the backward direction, achieving a bidirectional anti-slip difference coefficient >0.15. The textured layer surface is coated with silica microparticles (50-80 μm in diameter), achieving a static friction coefficient of 0.85. 20 mm diameter circular reinforcing pads are installed at the four corners of the bottom, increasing the local compressive strength to three times that of the ordinary area.

[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 illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of the invention. All such changes and modifications fall within the scope of the invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A compression-resistant, environmentally friendly corrugated paper carton comprising a carton shell (1), characterised in that: The bottom of the carton shell (1) is provided with a support assembly (3), and the top of the carton shell (1) is movably mounted with a carton top cover (2); the support assembly (3) comprises a carton base (301), a support cylinder (302), a fence paperboard (303), a limiting paperboard (304) and a cylindrical paperboard (305), the carton base (301) is fixedly connected to the bottom of the carton shell (1), the top of the carton base (301) is fixedly connected with the support cylinder (302), the edge of the top of the carton base (301) is fixedly connected with the fence paperboard (303), a plurality of inwardly protruding limiting paperboards (304) are uniformly distributed on the inner side of the fence paperboard (303), the cylindrical paperboard (305) is fixedly mounted between the limiting paperboard (304) and the fence paperboard (303), and the lower end of the cylindrical paperboard (305) is fixedly connected to the top of the carton base (301).

2. A compression-resistant, environmentally friendly carton according to claim 1, wherein: The support assembly (3) further comprises a viscose layer (306) and a clamping column (307), the viscose layer (306) is uniformly coated on the laminated joint part of the fence paperboard (303), and the clamping column (307) is fixedly connected to the bottom center position of the carton top cover (2) and movably sleeved in the internal cavity of the cylindrical paperboard (305).

3. The compression-resistant, environmentally friendly carton of claim 1, wherein: The limiting paperboard (304) is a corrugated paper component with an arc-shaped bending structure, the bending radius of the limiting paperboard (304) is matched with the outer wall of the cylindrical paperboard (305), and the top end of the limiting paperboard (304) is provided with an arc-shaped clamping groove matched with the diameter of the cylindrical paperboard (305).

4. The compression-resistant, environmentally friendly carton of claim 1, wherein: The fence paperboard (303) is composed of at least three layers of vertically arranged corrugated paperboards, the corrugation directions of the corrugated paperboards are orthogonally distributed, and the height of the fence paperboard (303) is 2 / 3 of the total height of the carton shell (1).

5. The compression-resistant, environmentally friendly carton of claim 1, wherein: The thickness of the cylinder wall of the support cylinder (302) decreases from the bottom to the top to form a conical structure, the bottom diameter of the support cylinder (302) is equal to the diameter of the central opening of the carton base (301), and the outer surface of the support cylinder (302) is provided with a positioning flange matched with the inner diameter of the cylindrical paperboard (305).

6. A compression-resistant, eco-friendly carton according to claim 2, wherein: The clamping column (307) is a hollow cylindrical structure, the outer wall of the clamping column (307) is provided with spiral reinforcing ribs, the lower end of the clamping column (307) extends to form a conical guide portion, and the taper of the conical guide portion is consistent with the taper of the inner wall of the cylindrical paperboard (305).

7. A compression-resistant, eco-friendly carton according to claim 1, wherein: The inner side edge of the carton top cover (2) is provided with an annular sealing strip, the cross section of the sealing strip is in a trapezoidal structure, the material of the sealing strip is degradable EPE foamed material, and the sealing strip is in interference fit with the top end of the fence paperboard (303).

8. The compression-resistant, eco-friendly carton of claim 1, wherein: The cylindrical paperboard (305) is filled with a honeycomb paper core structure, the unit aperture of the honeycomb paper core is 3-5 mm, and the arrangement direction of the honeycomb paper core is perpendicular to the axial direction of the cylindrical paperboard (305).

9. The compression-resistant, eco-friendly carton of claim 1, wherein: The bottom surface of the carton base (301) is provided with an anti-skid pattern layer, the anti-skid pattern layer is composed of staggered wave-shaped protrusions, the distance between adjacent protrusions is 5-8 mm, and the height of the protrusions is 1-2 mm.

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