Preparation process of waterproof and breathable packaging box based on wax layer pore forming

Abstract

The application discloses a waterproof and breathable packaging box preparation process based on a wax layer pore-forming, which comprises the following steps: step one, accepting the raw paper; step two, storing and confirming the packaging paper; step three, coating the wax on the A surface of the packaging paper by spraying, and coating the wax on the B surface of the packaging paper by roller coating; step four, cutting the packaging paper according to the size of the packaging box, and forming the packaging paper with a standard size after cutting; step five, punching the wax layer on the A surface of the packaging paper; step six, cutting the packaging paper according to the shape of the packaging box, placing the packaging paper on a mold with a knife line and a flat pressing line, inserting the knife line and the flat pressing line into the packaging paper, and forming the packaging box after pressure folding. The application guarantees that the packaging box has excellent air permeability while meeting the waterproof performance, and the residual air in the packaged object is discharged out of the box after packaging, so that the packaged object is prevented from having residual air in the interior after being packaged and formed.

Description

Technical Field

[0001] This invention belongs to the field of food packaging material preparation, specifically relating to a process for preparing a waterproof and breathable packaging box based on wax layer pore formation. Background Technology

[0002] In the transportation of fresh and frozen foods, waterproof packaging boxes are often used. Current technology commonly involves coating the inner surface of the packaging box with a wax layer to achieve a waterproof effect. Typically, after the food fills the box, the lid is closed, and a hydraulic press is used to pressurize the lid to expel air. However, because the inner surface of the packaging box is coated with wax, some air remains between the lid and the box, located in the center, affecting the food's storage performance.

[0003] Chinese utility model patent application number 202120271536.2 discloses a packaging box for refrigerating fresh fish and meat. It includes an inflatable bag inside the box, into which nitrogen and carbon dioxide gases are injected to achieve food preservation. However, this method has high transportation costs and is unsuitable for mass production and transportation. Therefore, there is an urgent need for a manufacturing process for a waterproof and breathable packaging box to achieve low-cost, high-quality transportation of meat products. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a manufacturing process for a waterproof and breathable packaging box based on wax layer pore formation. This invention has low manufacturing cost, high process precision, and can achieve mass production of packaging boxes. The resulting packaging boxes have waterproof and breathable effects, enabling aseptic transportation of food.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a process for manufacturing a waterproof and breathable packaging box based on wax layer pore formation, comprising the following steps:

[0007] Step 1: Inspect the raw paper. Once it passes the inspection, the packaging paper is obtained.

[0008] Step 2: Store and confirm the packaging paper;

[0009] Step 3: After the packaging paper is loaded onto the machine, it is coated with wax. The A side of the packaging paper is coated with wax by spraying, and the B side is coated with wax by roller coating. The total thickness of the wax layer on the A side and the wax layer on the B side is 0.41±0.05mm, and the weight of wax per square meter of packaging paper is 340±5g.

[0010] Step 4: Cut the wrapping paper horizontally according to the size of the packaging box to form standard-sized wrapping paper;

[0011] Step 5: Use a punching device to punch a hole in the wax layer on side A of the packaging paper. The hole should penetrate the wax layer on side A without puncturing the packaging paper. The diameter of the hole should be less than 0.01 mm, and the gap between any two adjacent holes should be 1 mm.

[0012] The punching device includes:

[0013] The frame is a plate-like structure and is placed horizontally.

[0014] Gantry frame; the gantry frame is positioned above the frame;

[0015] Base plate; the base plate is placed on the frame, the base plate is used to place packaging paper, and the length and width of the base plate are smaller than the length and width of the frame;

[0016] Rollers; the rollers are mounted on the frame and located on both sides of the base plate for driving the packaging paper to move, and there is a gap between the rollers and the base plate;

[0017] Needle mounting plate; the needle mounting plate is mounted on the gantry frame via a servo mechanism and moves up and down under the drive of the servo mechanism; the needle mounting plate is located between the gantry frame and the base plate.

[0018] Perforating needles; the perforating needles are evenly installed on the side of the needle mounting plate facing the base plate for perforating the wax layer on side A of the packaging paper;

[0019] Pressure plate; the pressure plate is disposed between the needle mounting plate and the base plate, and the pressure plate and the needle mounting plate are connected by a telescopic spring;

[0020] Needle guide tube; the needle guide tube is disposed on the side of the pressure plate facing the needle mounting plate and passes through the needle mounting plate, the needle guide tube corresponds one-to-one with the punching needle and allows the punching needle to pass through;

[0021] The punching steps of the punching device are as follows: the packaging paper is placed on the base plate, the servo mechanism is activated, the needle mounting plate moves downward, and the punching needle moves downward to punch a hole in the wax layer on side A. When the punching needle breaks through the wax layer and touches the protective paper, the telescopic spring retracts, the servo mechanism drives the needle mounting plate to move upward, and the roller drives the packaging paper to move forward to complete one punching action.

[0022] Step 6: Die-cut the wrapping paper flat according to the shape of the packaging box. Place the wrapping paper on a mold with cutting lines and flat pressing lines, insert the cutting lines and flat pressing lines into the wrapping paper, and form the packaging box after pressure folding.

[0023] As a preferred technical solution, in step one, the maximum fluorescent area of ​​a single piece of the base paper is no greater than 5 cm². 2 .

[0024] As a preferred technical solution, in step three, the thickness of the wax layer on side B of the packaging paper is greater than the thickness of the wax layer on side A of the packaging paper.

[0025] As a preferred technical solution, in step three, a sprayer is used to spray the A side of the packaging paper, and an anilox roller is used to roll the B side of the packaging paper. During the waxing process, the sprayer, the anilox roller, and the packaging paper move simultaneously.

[0026] As a preferred technical solution, in step five, a paper arrival detection sensor is installed on the side of the base plate where the packaging paper enters.

[0027] As a preferred technical solution, in step five, the servo mechanism includes a drive cylinder and a height adjustment rod, and the fixed end of the drive cylinder is mounted on the gantry through the height adjustment rod.

[0028] As a preferred technical solution, guide rods are provided on both sides of the height adjustment rod, and the guide rods pass through the gantry frame.

[0029] As a preferred technical solution, in step six, after the packaging paper is die-cut into a flat sheet, the edges of the packaging paper are sealed.

[0030] Compared with the prior art, the present invention has the following technical effects:

[0031] (1) By controlling parameters such as wax layer thickness, pore size, and pore gap, this invention ensures that the packaging box has excellent air permeability while meeting waterproof performance. After packaging, the residual air inside the packaged item is discharged outside the box, avoiding the presence of residual air inside the packaged item after packaging.

[0032] (2) The present invention uses a specially designed punching device to punch holes in the wax layer, which improves the punching efficiency. By setting a spring as a buffer, it ensures that the punching needle can penetrate the wax layer but not puncture the packaging paper. Compared with the traditional carbon dioxide punching method, the success rate of punching is increased.

[0033] (3) In this invention, the A side of the packaging paper is coated with wax by spraying and the B side of the packaging paper is coated with wax by roller coating. This is because the wax layer on the sprayed side is relatively smooth. The smoother the wax layer surface, the less air permeability it has, so as to prevent the air permeability from being too high after the wax layer is perforated. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the drilling device of the present invention.

[0036] Figure 2 This is a flowchart of the manufacturing process of the waterproof and breathable packaging box of the present invention.

[0037] The specific descriptions of the attached drawings are as follows: 1. Frame; 2. Base plate; 3. Roller; 4. Paper arrival detection sensor; 5. Pressure plate; 6. Needle guide tube; 7. Gantry frame; 8. Needle mounting plate; 9. Punching needle; 10. Guide column; 11. Upper spring; 12. Lower spring; 13. Drive cylinder; 14. Height adjustment rod; 15. Guide rod. Detailed Implementation

[0038] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment provides a punching device for punching holes in the wax layer of packaging paper, including:

[0041] Frame 1; The frame 1 is a plate-shaped structure and is placed horizontally. In this embodiment, the frame 1 serves as a supporting structure for other structures.

[0042] Gantry 7; the gantry 7 is disposed above the frame 1, the bottom of the gantry 7 is installed on both sides of the frame 1, and the crossbar on the upper part of the gantry 7 is used to provide installation points.

[0043] Base plate 2; The base plate 2 is placed on the frame 1. The base plate 2 is used to place the packaging paper. The length and width of the base plate 2 are smaller than the length and width of the frame 1. A paper arrival detection sensor 4 is set on the side of the base plate 2 where the packaging paper enters.

[0044] Rollers 3; The rollers 3 are mounted on the frame 1 and located on both sides of the base plate 2 for driving the packaging paper to move. There is a gap between the rollers 3 and the base plate 2. In use, the packaging paper is placed between the rollers 3 on both sides and the packaging paper is driven to move forward by the rolling of the rollers 3.

[0045] Needle mounting plate 8; The needle mounting plate 8 is mounted on the gantry frame 7 via a servo mechanism and moves up and down under the drive of the servo mechanism. The needle mounting plate 8 is located between the gantry frame 7 and the base plate 2. The servo mechanism includes a drive cylinder 13 and a height adjustment rod 14. The fixed end of the drive cylinder 13 is mounted on the gantry frame 7 via the height adjustment rod 14. The telescopic end of the drive cylinder 13 drives the needle mounting plate 8 to move up and down to achieve drilling. Guide rods 15 are provided on both sides of the height adjustment rod 14, and the guide rods 15 pass through the gantry frame 7.

[0046] The punching needle 9 is evenly installed on the side of the needle mounting plate 8 facing the base plate 2 for punching holes in the wax layer on side A of the packaging paper. The diameter of the punching needle 9 is less than 0.01 mm.

[0047] Pressure plate 5; The pressure plate 5 is disposed between the needle mounting plate 8 and the base plate 2. The pressure plate 5 and the needle mounting plate 8 are connected by a telescopic spring. In this embodiment, a guide post 10 is provided between the pressure plate 5 and the needle mounting plate 8. Specifically, the lower end of the guide post 10 is fixedly installed on the pressure plate 5, and the upper end of the guide post 10 passes through the needle mounting plate 8. A lower spring 12 is provided on the part of the guide post 10 between the needle mounting plate 8 and the pressure plate 5, and an upper spring 11 is provided on the part between the upper end of the guide post 10 and the needle mounting plate 8. By setting the upper spring 11 and the lower spring 12, the punching needle 9 has a certain buffer when punching, so as to avoid the punching needle 9 puncturing the packaging paper. The extension and elasticity of the lower spring 12 and the upper spring 11 can be determined according to the actual use, which will not be described in detail here.

[0048] Needle guide tube 6; The needle guide tube 6 is disposed on the side of the pressure plate 5 facing the needle mounting plate 8 and passes through the needle mounting plate 8. The needle guide tube 6 corresponds one-to-one with the punching needle 9 and allows the punching needle 9 to pass through. By setting the needle guide tube 6, the punching needle 9 can maintain vertical movement, which improves the punching effect.

[0049] Example 2

[0050] like Figure 2 As shown, this embodiment provides a manufacturing process for a waterproof and breathable packaging box based on wax layer pore formation, including the following steps:

[0051] Step 1: Inspect the base paper of the packaging box. The largest fluorescent area of ​​a single piece of base paper should not exceed 5cm². 2The width of the packaging paper is 625±5mm. After acceptance, the packaging paper is obtained.

[0052] Step 2: Store and verify the packaging paper. The warehouse environment should be clean, with a suitable temperature, good ventilation, sufficient lighting, and equipped with air conditioning, exhaust fans, window screens, ultraviolet insect traps, mouse traps, mouse barriers, and thermometers and hygrometers.

[0053] Step 3: After the packaging paper is loaded onto the machine, it is waxed. Side A of the packaging paper is waxed using a spray method, while side B is waxed using a roller coating method. The total thickness of the wax layer on both sides is 0.41±0.05mm, and the weight of wax per square meter of packaging paper is 340±5g. The thickness of the wax layer on side B is greater than that on side A. Specifically, the waxing method involves spraying side A with a sprayer and roller coating side B with an anilox roller. During the waxing process, the sprayer, anilox roller, and packaging paper move simultaneously.

[0054] Step 4: Cut the wrapping paper into horizontal pieces according to the size of the packaging box. The horizontal cut length is 685±5mm. After cutting, the wrapping paper will be of standard size.

[0055] Step 5: Drill a hole in the wax layer on side A of the packaging paper. The hole should penetrate the wax layer without puncturing the packaging paper. The diameter of the hole should be less than 0.01 mm, and the gap between any two adjacent holes should be 1 mm. The drilling method is as follows: The packaging paper is placed on the base plate 2. After the paper positioning sensor 4 detects that the paper has reached its position, the drive cylinder 13 is activated, the needle mounting plate 8 moves downward, and the drilling needle 9 moves downward to drill a hole in the wax layer on side A. When the drilling needle 9 penetrates the wax layer and touches the packaging paper, the pressure on the drilling needle 9 increases, the lower spring 12 retracts to a certain extent, the drive cylinder 13 receives the signal and activates, driving the needle mounting plate 8 upward. The roller 3 drives the packaging paper forward, completing one drilling action.

[0056] Step 6: Die-cut the packaging paper into flat sheets according to the shape of the packaging box. After die-cutting, seal the edges of the packaging paper. Place the packaging paper on a mold with cutting lines and flat pressing lines. Insert the cutting lines and flat pressing lines into the packaging paper. After pressure folding, the packaging box is formed. The air permeability of the packaging box is measured by an air permeability tester and the value is 100±20s / 100ml.

[0057] Although the above embodiments have provided a detailed description of the present invention, it should be understood by those skilled in the art that modifications or improvements can be made based on the disclosure of the present invention without departing from the spirit and scope of the invention, and such modifications and improvements are all within the spirit and scope of the present invention.

Claims

1. A manufacturing process for a waterproof and breathable packaging box based on wax layer pore formation, characterized in that, Includes the following steps: Step 1: Inspect the raw paper. Once it passes the inspection, the packaging paper is obtained. Step 2: Store and confirm the packaging paper; Step 3: After the packaging paper is loaded onto the machine, it is coated with wax. The A side of the packaging paper is coated with wax by spraying, and the B side is coated with wax by roller coating. The total thickness of the wax layer on the A side and the wax layer on the B side is 0.41±0.05mm, and the weight of wax per square meter of packaging paper is 340±5g. In step three, the thickness of the wax layer on side B of the packaging paper is greater than the thickness of the wax layer on side A of the packaging paper. Step 4: Cut the wrapping paper horizontally according to the size of the packaging box to form standard-sized wrapping paper; Step 5: Use a punching device to punch a hole in the wax layer on side A of the packaging paper. The hole should penetrate the wax layer on side A without puncturing the packaging paper. The diameter of the hole should be less than 0.01 mm, and the gap between any two adjacent holes should be 1 mm. The punching device includes: The frame is a plate-like structure and is placed horizontally. Gantry frame; the gantry frame is positioned above the frame; Base plate; the base plate is placed on the frame, the base plate is used to place packaging paper, and the length and width of the base plate are smaller than the length and width of the frame; Rollers; the rollers are mounted on the frame and located on both sides of the base plate for driving the packaging paper to move, and there is a gap between the rollers and the base plate; Needle mounting plate; the needle mounting plate is mounted on the gantry frame via a servo mechanism and moves up and down under the drive of the servo mechanism; the needle mounting plate is located between the gantry frame and the base plate. Perforating needles; the perforating needles are evenly installed on the side of the needle mounting plate facing the base plate for perforating the wax layer on side A of the packaging paper; A pressure plate; the pressure plate is disposed between the needle mounting plate and the base plate, and the pressure plate and the needle mounting plate are connected by a telescopic spring; a guide post is disposed between the pressure plate and the needle mounting plate, the lower end of the guide post is fixedly mounted on the pressure plate, the upper end of the guide post passes through the needle mounting plate, a lower spring is disposed on the guide post portion between the needle mounting plate and the pressure plate, and an upper spring is disposed on the portion between the upper end of the guide post and the needle mounting plate; Needle guide tube; the needle guide tube is disposed on the side of the pressure plate facing the needle mounting plate and passes through the needle mounting plate, the needle guide tube corresponds one-to-one with the punching needle and allows the punching needle to pass through; The punching steps of the punching device are as follows: the packaging paper is placed on the base plate, the servo mechanism is activated, the needle mounting plate moves downward, and the punching needle moves downward to punch a hole in the wax layer on side A. When the punching needle breaks through the wax layer and touches the protective paper, the telescopic spring retracts, the servo mechanism drives the needle mounting plate to move upward, and the roller drives the packaging paper to move forward to complete one punching action. In step five, the servo mechanism includes a drive cylinder and a height adjustment rod. The fixed end of the drive cylinder is mounted on the gantry through the height adjustment rod. Guide rods are provided on both sides of the height adjustment rod, and the guide rods pass through the gantry. Step 6: Die-cut the wrapping paper flat according to the shape of the packaging box. Place the wrapping paper on a mold with cutting lines and flat pressing lines, insert the cutting lines and flat pressing lines into the wrapping paper, and form the packaging box after pressure folding.

2. The manufacturing process of a waterproof and breathable packaging box based on wax layer pore formation as described in claim 1, characterized in that, In step one, the maximum fluorescent area of ​​a single piece of the original paper is no greater than 5 cm². 2 .

3. The manufacturing process of a waterproof and breathable packaging box based on wax layer pore formation as described in claim 1, characterized in that, In step three, a sprayer is used to spray the A side of the packaging paper, and an anilox roller is used to roll the B side of the packaging paper. During the waxing process, the sprayer, the anilox roller, and the packaging paper move simultaneously.

4. The manufacturing process of a waterproof and breathable packaging box based on wax layer pore formation as described in claim 1, characterized in that, In step five, a paper arrival detection sensor is installed on the side of the base plate where the packaging paper enters.

5. The manufacturing process of a waterproof and breathable packaging box based on wax layer pore formation as described in claim 1, characterized in that, In step six, after the packaging paper is die-cut into a flat sheet, the edges of the packaging paper are sealed.

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