Three-dimensional folding forming manufacturing method of special-shaped paper box

Abstract

The invention discloses a three-dimensional folding forming manufacturing method for a special-shaped paper box. The three-dimensional folding forming manufacturing method comprises the steps that firstly, a product design stage is conducted; 2, a sample verification stage; 3, preparing materials and a process; step 4, folding and forming process; and step 5, quality inspection and packaging. According to the special-shaped box, the purpose of prolonging the service life of the special-shaped box is achieved by simulating the stress distribution of the box body, finding the supporting weak area and locally reinforcing the strength of the supporting weak area, and the reliability of the product is improved; according to the adaptability of a sample verification level and printing house communication equipment and according to suggestions fed back by customers, design details are continuously adjusted to continuously upgrade products, the quality of the products can be continuously improved, and continuous improvement is achieved according to market feedback; in the folding and forming process, a transparent PET sheet is pasted at the corresponding position of a split window, an edge anti-falling layer is pressed, a supporting lining needs to be synchronously assembled on a multi-layer nested box body, collapse in the transportation process is avoided, and the effect of protecting the special-shaped box in the transportation and carrying process can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of special-shaped paper box manufacturing methods, in particular to a three-dimensional folding and molding manufacturing method for a special-shaped paper box. Background Art

[0002] The 3D folding manufacturing method for special-shaped paper boxes not only meets diverse market demands but also provides both economic and environmental benefits. It can support highly customized designs, allowing the creation of paper boxes of various shapes and sizes, whether simple rectangles or complex geometric shapes, to be achieved through 3D folding technology. Compared with traditional injection molding or other rigid materials, paper is a low-cost raw material. At the same time, the die-cutting and folding process can achieve large-scale production, further reducing unit costs. Paper is a renewable resource and easy to recycle. Using paper boxes instead of non-degradable materials such as plastic helps reduce environmental pollution and meets the demand for green packaging in modern society. However, the 3D folding manufacturing method for special-shaped paper boxes currently on the market has obvious defects: first, the strength of the support weak area is not considered in the initial design, which can easily lead to the paper box having a lifespan less than expected; second, the technology cannot be continuously upgraded and improved; finally, the window design and multi-layer nested box body are not specially reinforced, which can easily cause damage during use and transportation. Therefore, it is necessary to design a 3D folding manufacturing method for special-shaped paper boxes. Summary of the Invention

[0003] The purpose of the present invention is to provide a three-dimensional folding and forming manufacturing method for special-shaped paper boxes to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a three-dimensional folding and forming manufacturing method for a special-shaped paper box, comprising the following steps: step 1, product design stage; step 2, sample verification stage; step 3, material and process preparation; step 4, folding and forming process; step 5, quality inspection and packaging;

[0005] In the above step 1, the actual purpose and function of the special-shaped box are clarified through the actual needs of the user, and then a plan is formulated according to the purpose and function, and three-dimensional drawing software is used for modeling and structural design;

[0006] In the above step 2, samples are produced and tested in multiple dimensions, including folding feasibility, load-bearing capacity, and visual effect verification. Design defects are corrected before mass production.

[0007] In the above step 3, appropriate materials are selected based on demand and cost. The selected materials need to meet national standards, and the process preparation before processing is completed according to the designed process route;

[0008] In the above step 4, folding and forming are completed through three processes: pre-folding, automated folding and bonding, and special structural reinforcement;

[0009] In the above step five, the processed special-shaped boxes are quality inspected, and qualified products are packaged and sent to customers according to the order requirements.

[0010] As a further technical solution of the present invention, in the step one, the three-dimensional structure of the special-shaped paper box is designed based on the product appearance, functional requirements and brand characteristics. Special shapes such as window openings, polygons or curved surfaces need to be considered, and combined with mechanical stability optimization, the basic box type is selected from front and back buckles, self-locking bottoms, top and bottom covers or customized special-shaped structures. Complex structures need to be equipped with lining supports to enhance stability. White cardboard, kraft paper or composite materials are selected, and the printing process and surface treatment are planned.

[0011] As a further technical solution of the present invention, in step one, precise drawings are drawn using CAD or professional packaging design software, and folding lines, bonding sites and decorative areas are marked to ensure smooth transitions of the curved surface and processability through die-cutting. Special-shaped structures are achieved through oblique indentations, curved indentations or reverse press designs to simulate the force distribution of the box body, avoid supporting weak areas, and add local reinforcement structures when necessary.

[0012] As a further technical solution of the present invention, in the step 2, a preliminary sample box is cut by a die-cutting machine, the folding feasibility is checked by manual pre-folding, the fit of the special-shaped seams and the smoothness of opening and closing are tested in detail, and the completed sample is verified by filling with actual products or counterweights. The compressive strength of the box body is verified by a load-bearing test, a drop test is carried out, and the impact resistance is evaluated by simulated transportation. The printing effect is compared with the design draft, the die-cutting parameters are adjusted to optimize the folding accuracy, and the die-cutting plate parameters, folding sequence, glue dosage and assembly steps are marked on the process manual for execution by the production department. The equipment adaptability is communicated with the printing factory and based on the feedback suggestions, the design details are continuously adjusted to continuously upgrade the product.

[0013] As a further technical solution of the present invention, in step three, the process of material and process preparation is divided into: S1, material selection and verification; S2, printing process planning; S3, die cutting and creasing processing; S4, process parameter calibration; S5, glue and auxiliary material preparation.

[0014] As a further technical solution of the present invention, in S1, white cardboard, gray board or aluminum foil is selected according to functional requirements. For display requirements, hot stamping paper, laser film or transparent PET sheet is partially used to enhance visual appeal, and a balance needs to be struck between load-bearing capacity and cost-effectiveness.

[0015] In S2, UV printing, silk screen printing or digital printing are selected according to the complexity of the design to ensure color reproduction and wear resistance, and matte / gloss film coating, embossing or UV local varnish are used to enhance the texture;

[0016] In S3, custom-made special-shaped cutting dies are used to ensure smooth cutting edges. Complex curved areas require segmented die-cutting technology, and the indentation depth is set to one-third to one-half of the paper thickness to avoid folding cracks or loose molding.

[0017] In S4, the gap between the pressure roller and the fixed position of the die cutter are adjusted to ensure that the cutting and creasing accuracy error is ≤±0.3mm. The folding path of the folder-gluer is calibrated by the positioning sensor to match the angle of the special-shaped crease.

[0018] In S5, choose quick-drying environmentally friendly water-based glue or hot melt glue, which must pass the temperature resistance test. The gray board or EVA foam inner tray is cut according to the die-cutting drawing, and a tolerance of ±0.5mm is reserved for assembly and nesting.

[0019] As a further technical solution of the present invention, in step four, the folding and forming process is divided into: M1, pre-folding processing; M2, automatic folding and bonding; M3, special structure reinforcement.

[0020] As a further technical solution of the present invention, in the M1, pre-creases are made along the die-cutting line by mechanical or manual means to ensure uniform folding depth, thereby avoiding paper tearing or crease deviation during subsequent forming. For complex creases such as arcs and sharp angles, a step-by-step progressive folding technology is used to reduce stress concentration.

[0021] In the M2, the folding path for special-shaped boxes is set on the folder gluer, and the angle and speed of the robotic arm are controlled by a servo motor to adapt to polygonal edges or curved structures. The hexagonal box body requires multiple folding angle calibration to ensure seamless alignment at the intersection of adjacent panels. Water-based quick-drying adhesive is used for flat seams, and hot melt adhesive is used for special-shaped seams to enhance local bonding strength. After bonding, pressure is applied by rollers or vacuum suction cups to ensure that the seams are tightly fitted and free of bubbles. The window design requires the attachment of transparent PET sheets at the corresponding positions and the edges are pressed to prevent delamination. Multi-layer nested boxes require the simultaneous assembly of support linings to prevent collapse during transportation.

[0022] In M3, the curved box cover or wavy side needs to be manually fine-tuned for folding curvature, and the shape needs to be fixed with the shaping mold until the glue solidifies. When installing additional functional components such as magnetic buckles and ribbon perforations, positioning and punching are required and embedded parts need to be embedded to avoid damaging the overall structural strength.

[0023] As a further technical solution of the present invention, in the step five, a three-dimensional scanner is used to compare the finished product with the design model to detect the folding angle deviation and key dimension tolerance. The folding angle deviation error is ≤±1°, and the key dimension tolerance is ±0.5mm. The focus is on verifying the matching degree between the curvature of the special-shaped curved surface and the tongue lock buckle. A caliper is used to measure the tongue depth, bonding seam width and other parameters to ensure that the process meets the standards. The stacking load is simulated to detect whether the box body is deformed or the lining collapses. The robotic arm simulates the opening and closing action more than 200 times to verify the fatigue resistance of the hinge crease and the attenuation degree of the magnetic buckle adsorption force. For the window design, the flatness of the transparent PET sheet is checked, and the transparency is verified by a transmittance meter. The anti-counterfeiting hot stamping / laser film needs to be tested for color consistency with a colorimeter, and the scratch resistance of the wear-resistant coating is verified to be ≥500 times.

[0024] As a further technical solution of the present invention, in step five, during packaging, the surface of the finished product is covered with a protective film or bubble bag to avoid scratches during transportation, corrugated partitions are inserted between the multi-layer nested boxes to prevent extrusion and deformation, and anti-collision corner guards are added to special-shaped boxes.

[0025] Compared with the prior art, the beneficial effects of the present invention are: by simulating the force distribution of the box body, the weak support area is found, and by locally strengthening the strength of the weak support area, the barrel effect can be avoided, the purpose of increasing the life of the special-shaped box is achieved, and the reliability of the product is improved; in the sample verification stage, the equipment adaptability is communicated with the printing factory and based on customer feedback, the design details are continuously adjusted to continuously upgrade the product, which can continuously improve the quality of the product and continuously improve according to market feedback; in the folding and forming process, transparent PET sheets are pasted at the corresponding positions of the windows, and the edges are pressed to prevent delamination, and the multi-layer nested boxes need to be assembled with support linings at the same time to avoid collapse during transportation, which can protect the special-shaped boxes during transportation and handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Please see the attached Figure 1 The present invention provides an embodiment of a three-dimensional folding and forming manufacturing method for a special-shaped paper box, comprising the following steps: step 1, product design stage; step 2, sample verification stage; step 3, material and process preparation; step 4, folding and forming process; step 5, quality inspection and packaging;

[0029] In the above step 1, the actual purpose and function of the special-shaped box are clarified through the actual needs of the user, and then a plan is formulated according to the purpose and function, and three-dimensional drawing software is used for modeling and structural design;

[0030] In the above step 2, samples are produced and tested in multiple dimensions, including folding feasibility, load-bearing capacity, and visual effect verification. Design defects are corrected before mass production.

[0031] In the above step 3, appropriate materials are selected based on demand and cost. The selected materials need to meet national standards, and the process preparation before processing is completed according to the designed process route;

[0032] In the above step 4, folding and forming are completed through three processes: pre-folding, automated folding and bonding, and special structural reinforcement;

[0033] Among them, in the above step five, the processed special-shaped boxes are quality inspected, and qualified products are packaged and sent to customers according to the order requirements; in step one, the three-dimensional structure of the special-shaped paper box is designed based on the product appearance, functional requirements and brand characteristics. Special shapes such as window openings, polygons or curved surfaces need to be considered, and combined with mechanical stability optimization, the basic box type is selected from front and back buckles, self-locking bottoms, top and bottom covers or customized special-shaped structures. Complex structures need to be matched with lining supports to enhance stability. White cardboard, kraft paper or composite materials are selected, and the printing process and surface treatment are planned; in step one, CAD or professional packaging design software is used to draw precise drawings, mark folding lines, bonding sites and decorative areas, ensure that the curved surface transition is smooth and die-cuttable, and the special-shaped structure is realized through oblique indentation, curved indentation or reverse press design, simulate the force distribution of the box body, avoid supporting weak areas, and add local reinforcement structures when necessary; in step two, the preliminary sample box is cut by a die-cutting machine, the folding feasibility is checked by manual pre-folding, and the special-shaped The fit of the seams and the smoothness of opening and closing are verified by filling the finished samples with actual products or counterweights. The compressive strength of the box is verified through load-bearing tests, drop tests are conducted, and impact resistance is evaluated through simulated transportation. The printing effect is compared with the design draft, and the die-cutting parameters are adjusted to optimize folding accuracy. The die-cutting plate parameters, folding sequence, glue dosage and assembly steps are marked on the process instructions for the production department to implement. Communicate with the printing factory about the adaptability of the equipment and, based on feedback, continuously adjust the design details to continuously upgrade the product. In step three, the process of material and process preparation is divided into: S1, material selection and verification; S2, printing process planning; S3, die-cutting and creasing processing; S4, process parameter calibration; S5, glue and auxiliary material preparation. In S1, white cardboard, gray board or aluminum foil-coated paper are selected according to functional requirements. For display needs, hot stamping paper, laser film or transparent PET sheet are used locally to enhance visual appeal. It is necessary to balance load-bearing capacity and cost-effectiveness.

[0034] In S2, UV printing, silk screen printing or digital printing are selected according to the complexity of the design to ensure color reproduction and wear resistance, and matte / gloss film coating, embossing or UV local varnish are used to enhance the texture;

[0035] In S3, custom-made special-shaped cutting dies are used to ensure smooth cutting edges. Complex curved areas require segmented die-cutting technology, and the indentation depth is set to one-third to one-half of the paper thickness to avoid folding cracks or loose molding.

[0036] In S4, the gap between the pressure roller and the fixed position of the die cutter are adjusted to ensure that the cutting and creasing accuracy error is ≤±0.3mm. The folding path of the folder-gluer is calibrated by the positioning sensor to match the angle of the special-shaped crease.

[0037] In S5, a quick-drying, environmentally friendly water-based adhesive or hot-melt adhesive is selected, which must pass a temperature resistance test. Gray cardboard or EVA foam inserts are cut according to the die-cutting drawing, with a tolerance of ±0.5mm for assembly and nesting. In step 4, the folding and forming process is divided into: M1, pre-folding; M2, automated folding and gluing; M3, special structural reinforcement. In M1, pre-folding and indentation along the die-cutting line is performed mechanically or manually to ensure uniform fold line depth to avoid paper tearing or crease offset during subsequent forming. For complex creases such as arcs and sharp angles, a step-by-step progressive folding technique is used to reduce stress concentration.

[0038] In the M2, the folding path for special-shaped boxes is set on the folder gluer, and the angle and speed of the robotic arm are controlled by a servo motor to adapt to polygonal edges or curved structures. The hexagonal box body requires multiple folding angle calibration to ensure seamless alignment at the intersection of adjacent panels. Water-based quick-drying adhesive is used for flat seams, and hot melt adhesive is used for special-shaped seams to enhance local bonding strength. After bonding, pressure is applied by rollers or vacuum suction cups to ensure that the seams are tightly fitted and free of bubbles. The window design requires the attachment of transparent PET sheets at the corresponding positions and the edges are pressed to prevent delamination. Multi-layer nested boxes require the simultaneous assembly of support linings to prevent collapse during transportation.

[0039] Among them, in M3, the arc-shaped box cover or wavy side needs to be manually fine-tuned for folding curvature, and the shape needs to be fixed with the shaping mold until the glue solidifies. When installing additional functional components such as magnetic buckles and ribbon perforations, it is necessary to locate the holes and embed the embedded parts to avoid damaging the overall structural strength; in step five, a three-dimensional scanner is used to compare the finished product with the design model to detect the folding angle deviation and key dimension tolerance. The folding angle deviation error is ≤±1°, and the key dimension tolerance is ±0.5mm. The focus is on verifying the matching degree between the curvature of the special-shaped surface and the tongue lock buckle, and using a caliper to measure the tongue depth, bonding seam width and other parameters to ensure The process meets the standards, simulates stacking load, detects whether the box body is deformed or the lining collapses, and the robotic arm simulates opening and closing actions for more than 200 times to verify the fatigue resistance of the hinge crease and the attenuation of the magnetic buckle adsorption force. For window design, check the flatness of the transparent PET sheet and verify the transparency with a transmittance meter. The anti-counterfeiting hot stamping / laser film needs to be tested for color consistency with a colorimeter, and verify that the wear-resistant coating can withstand scratches ≥500 times. When packaging, the finished product is covered with protective film or bubble bag to avoid scratches during transportation. Corrugated partitions are inserted between multi-layer nested boxes to prevent extrusion and deformation, and special-shaped boxes are equipped with anti-collision corner guards.

[0040] Based on the above, the advantages of the present invention are: by simulating the force distribution of the box body, the weak support area is found, and by locally strengthening the strength of the weak support area, the barrel effect can be avoided, the purpose of increasing the life of the special-shaped box is achieved, and the reliability of the product is improved; in the sample verification stage, the equipment adaptability is communicated with the printing factory and based on customer feedback, the design details are continuously adjusted to continuously upgrade the product, which can continuously improve the quality of the product and continuously improve according to market feedback; in the folding and forming process, transparent PET sheets are pasted at the corresponding positions of the windows, and the edges are pressed to prevent delamination, and the multi-layer nested box bodies need to be assembled with support linings at the same time to avoid collapse during transportation, which can protect the special-shaped boxes during transportation and handling.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for manufacturing a three-dimensional folding and forming irregular paper box, comprising the following steps:

1. product design; 2. sample verification; 3. material and process preparation; 4. folding and forming process; 5. quality inspection and packaging; characterized by: In the above step 1, the actual purpose and function of the special-shaped box are clarified through the actual needs of the user, and then a plan is formulated according to the purpose and function, and three-dimensional drawing software is used for modeling and structural design; In the above step 2, samples are produced and tested in multiple dimensions, including folding feasibility, load-bearing capacity, and visual effect verification. Design defects are corrected before mass production. In the above step 3, appropriate materials are selected based on demand and cost. The selected materials need to meet national standards, and the process preparation before processing is completed according to the designed process route; In the above step 4, folding and forming are completed through three processes: pre-folding, automated folding and bonding, and special structural reinforcement; In the above step five, the processed special-shaped boxes are quality inspected, and qualified products are packaged and sent to customers according to the order requirements.

2. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 1, characterized in that: In the step one, the three-dimensional structure of the special-shaped paper box is designed based on the product appearance, functional requirements and brand characteristics. Special shapes such as window openings, polygons or curved surfaces need to be considered. Combined with mechanical stability optimization, the basic box type is selected from front and back buckles, self-locking bottoms, top and bottom covers or customized special-shaped structures. Complex structures need to be equipped with lining supports to enhance stability. White cardboard, kraft paper or composite materials are selected, and the printing process and surface treatment are planned.

3. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 2, characterized in that: In the first step, a precise drawing is drawn using CAD or professional packaging design software, and folding lines, bonding points, and decorative areas are marked to ensure smooth transitions of the curved surface and processability through die-cutting. Special-shaped structures are achieved through oblique indentations, curved indentations, or reverse pressing designs to simulate the force distribution of the box body, avoid supporting weak areas, and add local reinforcement structures when necessary.

4. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 1, characterized in that: In the step 2, a preliminary sample box is cut by a die-cutting machine, and the folding feasibility is tested by manual pre-folding. The fit and opening and closing smoothness of the special-shaped seams are tested in detail, and the completed sample is verified by filling with actual products or counterweights. The compressive strength of the box body is verified by a load-bearing test, a drop test is carried out, and the impact resistance is evaluated by simulated transportation. The printing effect is compared with the design draft, and the die-cutting parameters are adjusted to optimize the folding accuracy. The die-cutting plate parameters, folding sequence, glue dosage and assembly steps are marked on the process manual for execution by the production department. The equipment adaptability is communicated with the printing factory and based on the feedback suggestions, the design details are continuously adjusted to continuously upgrade the product.

5. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 1, characterized in that: In step three, the material and process preparation process is divided into: S1, material selection and verification; S2, printing process planning; S3, die cutting and creasing processing; S4, process parameter calibration; S5, glue and auxiliary material preparation.

6. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 5, characterized in that: In S1, white cardboard, gray board or aluminum foil is selected according to functional requirements. For display needs, hot stamping paper, laser film or transparent PET sheet is used locally to enhance visual appeal. It is necessary to balance the load-bearing capacity and cost-effectiveness. In S2, UV printing, silk screen printing or digital printing are selected according to the complexity of the design to ensure color reproduction and wear resistance, and matte / gloss film coating, embossing or UV local varnish are used to enhance the texture; In S3, custom-made special-shaped cutting dies are used to ensure smooth cutting edges. Complex curved areas require segmented die-cutting technology, and the indentation depth is set to one-third to one-half of the paper thickness to avoid folding cracks or loose molding. In S4, the gap between the pressure roller and the fixed position of the die cutter are adjusted to ensure that the cutting and creasing accuracy error is ≤±0.3mm. The folding path of the folder-gluer is calibrated by the positioning sensor to match the angle of the special-shaped crease. In S5, choose quick-drying environmentally friendly water-based glue or hot melt glue, which must pass the temperature resistance test. The gray board or EVA foam inner tray is cut according to the die-cutting drawing, and a tolerance of ±0.5mm is reserved for assembly and nesting.

7. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 1, characterized in that: In step 4, the folding and forming process is divided into: M1, pre-folding processing; M2, automatic folding and bonding; M3, special structure reinforcement.

8. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 7, characterized in that: In M1, mechanical or manual pre-creases are made along the die-cutting line to ensure uniform fold depth, thereby avoiding paper tearing or crease deviation during subsequent forming. For complex creases such as arcs and sharp angles, a step-by-step progressive folding technology is used to reduce stress concentration. In the M2, the folding path for special-shaped boxes is set on the folder gluer, and the angle and speed of the robotic arm are controlled by a servo motor to adapt to polygonal edges or curved structures. The hexagonal box body requires multiple folding angle calibration to ensure seamless alignment at the intersection of adjacent panels. Water-based quick-drying adhesive is used for flat seams, and hot melt adhesive is used for special-shaped seams to enhance local bonding strength. After bonding, pressure is applied by rollers or vacuum suction cups to ensure that the seams are tightly fitted and free of bubbles. The window design requires the attachment of transparent PET sheets at the corresponding positions and the edges are pressed to prevent delamination. Multi-layer nested boxes require the simultaneous assembly of support linings to prevent collapse during transportation. In M3, the curved box cover or wavy side needs to be manually fine-tuned for folding curvature, and the shape needs to be fixed with the shaping mold until the glue solidifies. When installing additional functional components such as magnetic buckles and ribbon perforations, positioning and punching are required and embedded parts need to be embedded to avoid damaging the overall structural strength.

9. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 1, characterized in that: In the step five, a three-dimensional scanner is used to compare the finished product with the design model to detect the folding angle deviation and key dimension tolerance. The folding angle deviation error is ≤±1°, and the key dimension tolerance is ±0.5mm. The focus is on verifying the matching degree between the curvature of the special-shaped curved surface and the tongue lock buckle. A caliper is used to measure the tongue depth, bonding seam width and other parameters to ensure that the process meets the standards. The stacking load is simulated to detect whether the box body is deformed or the lining collapses. The robotic arm simulates the opening and closing action for more than 200 times to verify the fatigue resistance of the hinge crease and the attenuation degree of the magnetic buckle adsorption force. For the window design, the flatness of the transparent PET sheet is checked, and the transparency is verified by a transmittance meter. The anti-counterfeiting hot stamping / laser film needs to be tested for color consistency with a colorimeter, and it is verified that the wear-resistant coating can withstand scratches ≥500 times.

10. The three-dimensional folding and forming manufacturing method of a special-shaped paper box according to claim 9, characterized in that: In the step 5, during packaging, the surface of the finished product is covered with a protective film or bubble bag to avoid scratches during transportation, corrugated partitions are inserted between the multi-layer nested boxes to prevent squeezing and deformation, and anti-collision corner guards are added to the special-shaped boxes.

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