A waterproof packaging box and its preparation process

Abstract

The invention discloses a waterproof packaging box and a preparation process thereof, and relates to the technical field of packaging box preparation, and coating: a rotating motor drives a coating roller to rotate continuously, and the surface of the coating roller is adhered with waterproof coating in a waterproof coating storage box, and the coating is evenly coated on the top surface of a sheet material during rotation. The invention utilizes a rotating motor to drive the coating roller to rotate continuously, and the waterproof coating adheres to the surface of the coating roller from the penetration strip holes, and when the coating roller is tightly attached to the packaging box sheet material, the waterproof coating is evenly coated on its surface, forming a waterproof layer on the surface of the packaging box sheet material, and at the same time, an atomizing pump atomizes the liquid waterproof material in the waterproof liquid storage box, and sprays it on the bottom surface of the packaging box sheet material through a gas diversion box and an air jet nozzle to form another waterproof layer, and waterproof layers are prepared on both sides of the packaging box sheet material at the same time, thereby improving the preparation efficiency, and the waterproof production on both sides enables the interior and surface of the packaging box produced subsequently to have a waterproof effect, and the applicability is wider.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging box preparation, in particular to a waterproof packaging box and a preparation process thereof. Background Art

[0002] As the name implies, packaging boxes are boxes used to package products. They can be classified by material, such as paper boxes, iron boxes, wooden boxes, cloth boxes, leather boxes, acrylic boxes, corrugated packaging boxes, PVC boxes, etc. They can also be classified by product name, such as moon cake boxes, tea boxes, wolfberry boxes, candy boxes, exquisite gift boxes, local specialty boxes, wine boxes, chocolate boxes, food and medicine health products boxes, food packaging boxes, tea packaging boxes, pencil cases, etc. The function of packaging boxes is to ensure the safety of products in transportation and improve the grade of products. They are now widely used in electronics, food, beverages, alcohol, tea, cigarettes, medicine, health products, cosmetics, small appliances, clothing, toys, sporting goods and other industries and product packaging supporting industries. It is an indispensable industry. When packaging and transporting water-containing items, the packaging box needs to be waterproof to prevent moisture from penetrating outward during transportation. When preparing the packaging box, the sheet materials that make up the box body need to be waterproofed to form a waterproof layer on the surface of the sheet materials.

[0003] However, currently most waterproof layers are produced on one side, resulting in poor waterproof effect and low production efficiency. In addition, the waterproof coating is viscous and easily causes blockage during application, which causes the coating to be unable to be discharged normally, resulting in uneven production of the waterproof layer. Therefore, the present invention provides a waterproof packaging box and a preparation process thereof to meet people's needs. Summary of the invention

[0004] The present invention provides a waterproof packaging box and a preparation process thereof, which can effectively solve the problem proposed in the above background technology that the waterproof layer is mostly made on one side, the waterproof effect is poor, the production efficiency is low, and the waterproof coating is viscous and easily causes blockage during application, resulting in the coating being unable to be discharged normally, resulting in uneven application of the waterproof layer.

[0005] To achieve the above object, the present invention provides the following technical solution: a waterproof packaging box and a preparation process thereof, comprising the following steps:

[0006] S1. Placement: Place the packaging box sheet that needs waterproofing treatment between the upper conveyor roller and the lower conveyor roller. The conveying motor drives the lower conveyor roller to rotate and convey the sheet to the bottom of the coating roller.

[0007] S2, coating: the rotating motor drives the coating roller to rotate continuously, the surface of the coating roller is adhered with the waterproof coating inside the waterproof coating storage box, and the coating is evenly coated on the top surface of the sheet during rotation;

[0008] S3, spraying: the atomizing pump will extract the waterproof liquid in the waterproof liquid storage box and atomize it, and then spray it to the bottom surface of the sheet through the air nozzle;

[0009] S4. Monitoring: Use the height changes of the right supporting cylinder and the left supporting cylinder to compare the consumption of waterproof coating and waterproof liquid, and make timely inspection and adjustment when the movable horizontal frame is skewed;

[0010] S5, drying: the sheet material continues to move forward, and the axial flow fan will blow the hot air inside the upper drying box and the lower drying box to the top and bottom surfaces of the sheet material to dry the waterproof coating and waterproof liquid;

[0011] S6. Conveying: The dried sheet material moves forward from between the upper clamping roller and the lower clamping roller. Both sides of the dried sheet material have waterproof boxes, which are removed for splicing and installation to prepare a waterproof packaging box.

[0012] According to the above technical solution, upper conveying rollers are equidistantly installed at both ends of the top of the frame, lower conveying rollers are equidistantly installed at the top of the frame below the upper conveying rollers, a conveying motor is equidistantly installed at one end of the top of the frame, and a uniform spraying mechanism is provided in the middle of the frame;

[0013] The uniform spraying mechanism includes a rotating motor);

[0014] A rotating motor is fixedly installed in the middle of the frame, and a coating roller is fixedly connected to the output shaft of the rotating motor. A waterproof coating storage box is fixedly installed in the middle of the top of the frame, and a penetration strip hole is arranged at the bottom of the waterproof coating storage box. A gas diversion box is fixedly installed at the bottom of the middle of the frame, and air nozzles are fixedly installed at equal intervals at the top of the gas diversion box. A mounting frame is fixedly installed at the bottom of the frame, and an atomizing pump is fixedly installed in the middle of the top of the mounting frame. A waterproof liquid storage box is fixedly installed on one side of the bottom of the frame, and an infusion tube is fixedly connected to one end of the waterproof liquid storage box.

[0015] A movable connecting rod is movably installed through the bottom of the waterproof paint storage box, and a metal swing rod is equidistantly fixedly connected to the bottom end of the movable connecting rod. One end of the movable connecting rod is fixedly connected to an extrusion circular plate, and an extrusion spring is sleeved on the surface of one end of the movable connecting rod. An arc-shaped extrusion block is fixedly installed on the surface of one end of the coating roller.

[0016] According to the above technical solution, the number of the upper conveying rollers, the lower conveying rollers and the conveying motors are the same, the positions of the upper conveying rollers and the lower conveying rollers correspond one to one, and the output shaft of the conveying motor is fixedly connected to one end of the lower conveying roller;

[0017] The smear roller, the penetration strip hole and the air nozzle are located on the same vertical plane, the top surface of the smear roller extends to the bottom of the penetration strip hole, one end of the infusion tube is connected to the inlet end of the atomizer pump, and the discharge end of the atomizer pump and the bottom of the gas diversion box are connected by a pipeline.

[0018] According to the above technical solution, the bottom end of the metal swing rod extends to the inside of the penetration strip hole, the two ends of the extrusion spring are respectively connected to the surface wall of the waterproof paint storage box and the extrusion circular plate, the positions of the arc-shaped extrusion block and the extrusion circular plate correspond to each other, and the thickness between the two ends of the arc-shaped extrusion block shows an increasing trend.

[0019] According to the above technical solution, a hydraulic telescopic rod is fixedly installed on the top of the waterproof coating storage box, and a piston plate is fixedly connected to the bottom end of the hydraulic telescopic rod. An upper guide cylinder is fixedly installed on one end of the top of the waterproof coating storage box, and an upper lifting round rod is movably embedded in the middle of the upper guide cylinder. The top of the upper lifting round rod is fixedly connected to an upper lifting plate, and one end of the bottom of the upper lifting plate is fixedly connected to a right supporting cylinder.

[0020] A lower guide cylinder is fixedly installed at one end of the top of the waterproof liquid storage box, a lower lifting round rod is movably embedded in the middle of the lower guide cylinder, the bottom end of the lower lifting round rod is fixedly connected with a floating plate, the top of the lower lifting round rod is fixedly connected with a lower lifting plate, the middle of one end of the lower lifting plate is fixedly connected with a left supporting cylinder, a movable horizontal frame is movably installed between the middle parts of the right supporting cylinder and the left supporting cylinder, a horizontal frame is embedded in the middle part of the movable horizontal frame, pressure sensors are symmetrically fixedly installed at both ends of the horizontal frame, rubber sealing pads are fixedly connected to the ends of the pressure sensors, and extrusion blocks are fixedly bonded to the surface of the rubber sealing pads.

[0021] According to the above technical solution, the edge of the piston plate is tightly fitted with the inner wall of the waterproof coating storage box, and the bottom end of the upper lifting round rod is fixedly connected with the top end of the piston plate;

[0022] Movable grooves are symmetrically provided at both ends of the movable horizontal frame, and the right supporting cylinder and the left supporting cylinder respectively penetrate the two movable grooves. The right supporting cylinder and the left supporting cylinder are located at the same horizontal plane height, and a cavity is left between the two extrusion blocks, and the cavity is filled with water.

[0023] According to the above technical solution, a drying adjustment mechanism is installed at one end of the top of the frame;

[0024] The drying adjustment mechanism includes an upper drying box;

[0025] An upper drying box is fixedly installed on the top of the frame at a position on one side of the waterproof coating storage box, a lower drying box is fixedly installed on the bottom of the frame at a position corresponding to the upper drying box, blowing holes are provided on the bottom of the upper drying box and the top of the lower drying box, heating plates are equidistantly installed inside the upper drying box and the lower drying box, axial flow fans are fixedly installed on the middle of the top end of the upper drying box and the middle of the bottom end of the lower drying box, and a controller is fixedly installed on the top of the frame at a position on one side of the upper drying box;

[0026] The two sides of one end of the frame are symmetrically and rotatably installed with rotating rods, and a connecting shaft is rotatably installed between the two ends of the rotating rods at the same horizontal plane height, a lower clamping roller is fixedly installed in the middle of the connecting shaft located below, and an upper clamping roller is fixedly installed in the middle of the connecting shaft located above, and a support block is fixedly connected to the surface of the rotating rod, and the top and bottom of the two sides of the frame are fixedly installed with brackets, one end of the bracket is fixedly installed with a connecting spring, a protrusion is fixedly installed in the middle of one end of the connecting shaft located above, and a tension sensor is fixedly installed in the middle of one end of the connecting shaft located below, and the bottom end of the protrusion is fixedly connected with an elastic rope;

[0027] A ventilation cavity is opened in the middle of the movable connecting rod, and a partition is fixedly installed inside the ventilation cavity. An air inlet valve is fixedly installed on the top of one end of the upper drying box, and one end of the air inlet valve is fixedly connected to an air inlet pipe. An air outlet valve is fixedly installed on the bottom of one end of the upper drying box, and one end of the air outlet valve is fixedly connected to the air outlet pipe.

[0028] According to the above technical solution, the signal input end and the signal output end of the controller are respectively connected to the information output end of the tension sensor and the heating plate and the signal input end of the axial flow fan, and the heating plates are staggeredly distributed inside the upper drying box and the lower drying box, and one end of the heating plate has a gap with the inner wall of the upper drying box and the lower drying box;

[0029] The positions of the lower clamping roller and the upper clamping roller correspond to the upper conveying roller and the lower conveying roller respectively, a distance is left between the lower clamping roller and the upper clamping roller, the connecting spring is connected to the support block, and one end of the elastic rope is connected to the tension sensor.

[0030] According to the above technical solution, one end of the partition is in contact with the inner wall of the ventilation cavity, and a gap is left between the other end of the partition and the inner wall of the ventilation cavity. One end of the air inlet pipe extends to the interior of the ventilation cavity and is located on one side of the partition, and one end of the air outlet pipe extends to the interior of the ventilation cavity and is located on the other side of the partition.

[0031] According to the above technical solution, a waterproof packaging box is provided, and a box body is obtained according to the above-mentioned waterproof packaging box preparation process.

[0032] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0033] 1. A uniform spraying mechanism is provided, and a rotating motor is used to drive the coating roller to rotate continuously. The waterproof coating adheres to the surface of the coating roller from the penetration strip holes. When the coating roller is close to the packaging box sheet, the waterproof coating will be evenly applied on its surface to form a waterproof layer on the surface of the packaging box sheet. At the same time, the atomizing pump will atomize the liquid waterproof material inside the waterproof liquid storage box, and spray it on the bottom surface of the packaging box sheet through the gas diversion box and the air nozzle to form another waterproof layer. The waterproof layer is prepared on both sides of the packaging box sheet at the same time, which improves the preparation efficiency. The waterproof production on both sides makes the interior and surface of the packaging box produced subsequently have a waterproof effect, which is more applicable. The preparation of the waterproof layer is adjusted according to the placement direction of the packaging box sheet and the position during installation and preparation. The top surface is prepared in the form of smearing, which is more compact and has better effect. The bottom surface is prepared in the form of spraying, which is more convenient and will not produce paint dripping.

[0034] The arc-shaped extrusion block rotates continuously with the coating roller, and the extrusion circular plate is squeezed and fitted during the rotation. The arc-shaped extrusion block pushes and presses the extrusion circular plate from the narrower end to the thicker end, and the extrusion spring has a certain pressure-resettling effect, so that the movable connecting rod and the metal swing rod can reciprocate left and right. The metal swing rod moves the waterproof coating at the penetration strip hole to prevent the waterproof coating from being deposited and causing the penetration strip hole to be blocked, affecting the penetration of the coating and sticking to the surface of the coating roller.

[0035] 2. Use the hydraulic telescopic rod to drive the piston plate to rise and fall. The piston plate is pressed tightly on the surface of the waterproof coating. According to the consumption of the waterproof coating, the waterproof coating is pressed to push down the residual coating adhering to the inner wall of the waterproof coating storage box to prevent the coating from sticking and condensing, which will cause inconvenience in subsequent cleaning. At the same time, the upper lifting rod and the upper lifting plate will be pulled down together;

[0036] The floating plate floats on the liquid surface inside the waterproof liquid storage box and drops as the waterproof liquid is consumed. The lower lifting rod and the lower lifting plate drop accordingly, while the right supporting cylinder and the left supporting cylinder support the movable horizontal frame. The two drop at the same time, and the consumption progress and proportion of the waterproof coating and waterproof liquid correspond, so that the movable horizontal frame always remains horizontal. The placement position of the movable horizontal frame is used to monitor the consumption and remaining amount of the waterproof coating and waterproof liquid. The water stored inside the horizontal frame will squeeze the extrusion block and rubber sealing pad on one side when it is skewed. The pressure sensor is used to feel the pressure when it is skewed, so that the monitoring data is more accurate. When the consumption of waterproof coating and waterproof liquid is uneven, information can be obtained in time to inspect the equipment to prevent the equipment from being blocked, which will cause uneven thickness of the waterproof material applied and sprayed.

[0037] 3. A drying adjustment mechanism is provided, and a heating plate is used to heat the air entering the upper drying box and the lower drying box, and an axial flow fan generates airflow. The hot air is discharged to the surface of the packaging box sheet through the blowing holes to dry the sprayed and applied waterproof materials and accelerate the formation of the waterproof layer. There is a gap between the heating plate and the inner wall of the upper drying box and the lower drying box, and the air supply flows, which extends the distance of the airflow and makes it heated thoroughly.

[0038] 4. The lower clamping roller and the upper clamping roller are supported and limited by the connecting spring and the rotating rod. The dried packaging box sheet moves between the lower clamping roller and the upper clamping roller. The lower clamping roller and the upper clamping roller detect the thickness of the packaging box sheet after the waterproof layer is prepared. When the thickness of the packaging box sheet changes, the lower clamping roller and the upper clamping roller will separate and approach each other, and the elastic rope will be deformed, and then the tension sensor will be subjected to different pressures. The power of the heating plate and the axial flow fan will be adjusted according to its pressure data. After the thickness of the waterproof layer on the surface of the packaging box sheet increases, the information will be transmitted to the controller to increase the power of the heating plate and the axial flow fan. After the thickness of the waterproof layer on the surface of the packaging box sheet decreases, the controller will reduce the power of the heating plate and the axial flow fan. It will be adjusted according to the coating of the waterproof layer to prevent unnecessary waste of power and energy. The adjustment is more convenient and accurate, and a certain energy-saving concept is reflected.

[0039] To summarize, by combining the uniform spraying mechanism and the drying adjustment mechanism, the heated air inside the upper drying box is injected into the ventilation cavity from the outlet valve and the outlet pipe, and the ventilation cavity is divided by partitions, so that the hot air flow flows in the ventilation cavity for a period of time and then is re-injected into the upper drying box from the inlet pipe and the inlet valve. The hot air flow will heat and insulate the movable connecting rod and the metal swing rod, and use its heat to heat the waterproof coating that seeps into the waterproof coating storage box, so that the coating always remains in a molten state, preventing the coating from being affected by external environmental factors and causing agglomeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0041] In the attached picture:

[0042] Figure 1 It is a process flow chart of the present invention;

[0043] Figure 2 It is a structural schematic diagram of the frame of the present invention;

[0044] Figure 3 It is a schematic diagram of the installation structure of the rotating motor of the present invention;

[0045] Figure 4 It is a schematic diagram of the installation structure of the conveying motor of the present invention;

[0046] Figure 5 It is a schematic diagram of the installation structure of the extrusion spring of the present invention;

[0047] Figure 6 Schematic diagram of the installation structure of the air nozzle of the present invention;

[0048] Figure 7 It is a structural schematic diagram of the uniform spraying mechanism of the present invention;

[0049] Figure 8 It is a schematic diagram of the installation structure of the pressure sensor of the present invention;

[0050] Fig. 9 It is a structural schematic diagram of the drying adjustment mechanism of the present invention;

[0051] Fig.10 It is a schematic diagram of the installation structure of the partition of the present invention;

[0052] Numbers in the figure: 1, frame; 2, upper conveying roller; 3, lower conveying roller; 4, conveying motor;

[0053] 5. Uniform spraying mechanism; 501. Rotating motor; 502. Coating roller; 503. Waterproof coating storage box; 504. Penetration strip hole; 505. Gas diversion box; 506. Air jet nozzle; 507. Mounting frame; 508. Atomizing pump; 509. Waterproof liquid storage box; 510. Infusion tube; 511. Active connecting rod; 512. Metal swing rod; 513. Extrusion circular plate; 514. Extrusion spring; 515. Arc extrusion block; 516, hydraulic telescopic rod; 517, piston plate; 518, upper guide cylinder; 519, upper lifting rod; 520, upper lifting plate; 521, right supporting cylinder; 522, lower guide cylinder; 523, lower lifting rod; 524, floating plate; 525, lower lifting plate; 526, left supporting cylinder; 527, movable horizontal frame; 528, horizontal frame; 529, pressure sensor; 530, rubber sealing pad; 531, extrusion block;

[0054] 6. Drying adjustment mechanism; 601. Upper drying box; 602. Lower drying box; 603. Blowing hole; 604. Heating plate; 605. Axial flow fan; 606. Controller; 607. Rotating rod; 608. Connecting shaft; 609. Lower clamping roller; 610. Upper clamping roller; 611. Support block; 612. Bracket; 613. Connecting spring; 614. Bump; 615. Tension sensor; 616. Elastic rope; 617. Ventilation cavity; 618. Partition; 619. Inlet valve; 620. Inlet pipe; 621. Exit valve; 622. Exit pipe. DETAILED DESCRIPTION

[0055] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0056] Example: Figure 1 As shown, the present invention provides a technical solution, a waterproof packaging box and a preparation process thereof, comprising the following steps:

[0057] S1. Placement: Place the packaging box sheet that needs waterproofing treatment between the upper conveyor roller 2 and the lower conveyor roller 3. The conveying motor 4 drives the lower conveyor roller 3 to rotate and convey the sheet to the bottom of the coating roller 502.

[0058] S2, coating: the rotating motor 501 drives the coating roller 502 to rotate continuously, and the surface of the coating roller 502 is adhered with the waterproof coating inside the waterproof coating storage box 503, and the coating is evenly coated on the top surface of the sheet during rotation;

[0059] S3, spraying: the atomizing pump 508 will draw out the waterproof liquid in the waterproof liquid storage box 509 and atomize it, and then the air nozzle 506 will spray it onto the bottom surface of the sheet;

[0060] S4, monitoring: using the height changes of the right supporting cylinder 521 and the left supporting cylinder 526 to compare the consumption of the waterproof coating and the waterproof liquid, and timely perform maintenance and adjustment when the movable horizontal frame 527 is skewed;

[0061] S5, drying: the sheet material continues to move forward, and the axial flow fan 605 blows the hot air inside the upper drying box 601 and the lower drying box 602 to the top and bottom surfaces of the sheet material to dry the waterproof coating and the waterproof liquid;

[0062] S6. Conveying: The dried sheet material moves forward between the upper clamping roller 610 and the lower clamping roller 609. Both sides of the dried sheet material have waterproof boxes, which are removed for splicing and installation to prepare a waterproof packaging box.

[0063] like Figure 2-10 As shown, upper conveying rollers 2 are equidistantly installed at both ends of the top of the frame 1, lower conveying rollers 3 are equidistantly installed at the top of the frame 1 below the upper conveying rollers 2, and a conveying motor 4 is equidistantly installed at one end of the top of the frame 1. The number of upper conveying rollers 2, lower conveying rollers 3 and conveying motors 4 are the same, and the positions of upper conveying rollers 2 and lower conveying rollers 3 correspond one to one. The output shaft of the conveying motor 4 is fixedly connected to one end of the lower conveying roller 3, and a uniform spraying mechanism 5 is provided in the middle of the frame 1;

[0064] The uniform spraying mechanism 5 includes a rotating motor 501, a coating roller 502, a waterproof coating storage box 503, a penetration strip hole 504, a gas diversion box 505, an air nozzle 506, a mounting frame 507, an atomizing pump 508, a waterproof liquid storage box 509, an infusion tube 510, a movable connecting rod 511, a metal swing rod 512, an extrusion circular plate 513, an extrusion spring 514, an arc extrusion block 515, a hydraulic telescopic rod 516, a piston plate 517, an upper guide cylinder 518, an upper lifting circular rod 519, an upper lifting plate 520, a right supporting cylinder 521, a lower guide cylinder 522, a lower lifting circular rod 523, a floating plate 524, a lower lifting plate 525, a left supporting cylinder 526, a movable horizontal frame 527, a horizontal frame 528, a pressure sensor 529, a rubber sealing pad 530 and an extrusion block 531;

[0065] A rotating motor 501 is fixedly installed in the middle of the frame 1, and a coating roller 502 is fixedly connected to the output shaft of the rotating motor 501. A waterproof coating storage box 503 is fixedly installed in the middle of the top of the frame 1. The bottom of the waterproof coating storage box 503 is provided with a penetration strip hole 504. A gas diversion box 505 is fixedly installed at the bottom of the middle of the frame 1. Air nozzles 506 are fixedly installed at the top of the gas diversion box 505 at equal intervals. A mounting frame 507 is fixedly installed at the bottom of the frame 1. The middle of the top of the mounting frame 507 is fixed. An atomizing pump 508 is installed, a waterproof liquid storage box 509 is fixedly installed on one side of the bottom of the frame 1, and an infusion tube 510 is fixedly connected to one end of the waterproof liquid storage box 509. The smear roller 502, the penetration strip hole 504 and the air nozzle 506 are located on the same vertical plane. The top surface of the smear roller 502 extends to the bottom of the penetration strip hole 504. One end of the infusion tube 510 is connected to the inlet end of the atomizing pump 508, and the discharge end of the atomizing pump 508 and the bottom of the gas diversion box 505 are connected through a pipeline.

[0066] A movable connecting rod 511 is movably installed through the bottom of the waterproof coating storage box 503, and a metal swing rod 512 is equidistantly fixedly connected to the bottom end of the movable connecting rod 511, and one end of the movable connecting rod 511 is fixedly connected to an extrusion circular plate 513, and an extrusion spring 514 is sleeved on the surface of one end of the movable connecting rod 511. An arc-shaped extrusion block 515 is fixedly installed on the surface of one end of the coating roller 502, and the bottom end of the metal swing rod 512 extends to the inside of the penetration strip hole 504. The two ends of the extrusion spring 514 are respectively connected to the surface wall of the waterproof coating storage box 503 and the extrusion circular plate 513. The positions of the arc-shaped extrusion block 515 and the extrusion circular plate 513 correspond to each other, and the thickness between the two ends of the arc-shaped extrusion block 515 shows an increasing trend. The rotating motor 501 is used to drive the coating roller 502 to rotate continuously, and the waterproof coating is extruded from the penetration strip hole 504. The coating roller 502 is stuck to the surface of the coating roller 502. When the coating roller 502 is close to the packaging box sheet, the waterproof coating will be evenly applied on its surface to form a waterproof layer on the surface of the packaging box sheet. At the same time, the atomizing pump 508 will atomize the liquid waterproof material inside the waterproof liquid storage box 509, and spray it on the bottom surface of the packaging box sheet through the gas diversion box 505 and the air nozzle 506 to form another waterproof layer. The waterproof layer is prepared on both sides of the packaging box sheet at the same time, which improves the preparation efficiency. The waterproof production on both sides makes the interior and surface of the packaging box produced subsequently have a waterproof effect, which has a wider applicability. The preparation of the waterproof layer is adjusted according to the placement direction of the packaging box sheet and the position during installation and preparation. The top surface is prepared in the form of coating, which is more compact and has a better effect. The bottom surface is prepared in the form of spraying, which is more convenient and will not produce paint dripping.

[0067] The arc-shaped extrusion block 515 is used to continuously rotate with the smear roller 502, and the extrusion circular plate 513 is pressed and adhered during the rotation process. The arc-shaped extrusion block 515 pushes and presses the extrusion circular plate 513 from the narrower end to the thicker end, and the extrusion spring 514 has a certain pressure reset function, so that the movable link 511 and the metal swing rod 512 can reciprocate left and right, and the metal swing rod 512 moves the waterproof coating at the penetration strip hole 504 to prevent the waterproof coating from being deposited and causing the penetration strip hole 504 to be blocked, which affects the penetration of the coating and sticks to the surface of the smear roller 502;

[0068] A hydraulic telescopic rod 516 is fixedly installed on the top of the waterproof paint storage box 503, and a piston plate 517 is fixedly connected to the bottom end of the hydraulic telescopic rod 516. An upper guide cylinder 518 is fixedly installed on one end of the top of the waterproof paint storage box 503. An upper lifting rod 519 is movably embedded in the middle of the upper guide cylinder 518. The edge of the piston plate 517 is tightly fitted with the inner wall of the waterproof paint storage box 503. The bottom end of the upper lifting rod 519 is fixedly connected to the top of the piston plate 517. The top of the upper lifting rod 519 is fixedly connected to an upper lifting plate 520, and one end of the bottom of the upper lifting plate 520 is fixedly connected to a right supporting cylinder 521.

[0069] A lower guide cylinder 522 is fixedly installed at one end of the top of the waterproof liquid storage box 509, a lower lifting rod 523 is movably embedded in the middle of the lower guide cylinder 522, the bottom end of the lower lifting rod 523 is fixedly connected with a floating plate 524, the top of the lower lifting rod 523 is fixedly connected with a lower lifting plate 525, a left supporting cylinder 526 is fixedly connected to the middle of one end of the lower lifting plate 525, a movable horizontal frame 527 is movably installed between the middle of the right supporting cylinder 521 and the left supporting cylinder 526, a horizontal frame 528 is embedded in the middle of the movable horizontal frame 527, pressure sensors 529 are symmetrically fixedly installed at both ends of the horizontal frame 528, and rubber sealing pads 530 are fixedly connected to the ends of the pressure sensors 529. The surface of 30 is fixedly bonded with an extrusion block 531, and both ends of the movable horizontal frame 527 are symmetrically provided with movable grooves, and the right supporting cylinder 521 and the left supporting cylinder 526 respectively penetrate the two movable grooves, and the right supporting cylinder 521 and the left supporting cylinder 526 are located at the same horizontal plane height, and a cavity is left between the two extrusion blocks 531, and the cavity is filled with water. The hydraulic telescopic rod 516 is used to drive the piston plate 517 to rise and fall, and the piston plate 517 is pressed tightly on the surface of the waterproof coating. The waterproof coating is pressed according to the consumption of the waterproof coating, and the residual coating adhering to the inner wall of the waterproof coating storage box 503 is pushed down to prevent the coating from sticking and condensing, which makes it inconvenient to clean up later, and at the same time, the upper lifting rod 519 and the upper lifting plate 520 are pulled down together;

[0070] The floating plate 524 floats on the liquid surface inside the waterproof liquid storage box 509, and descends as the waterproof liquid is consumed. The lower lifting rod 523 and the lower lifting plate 525 descend together, and the right supporting cylinder 521 and the left supporting cylinder 526 support the movable horizontal frame 527. The two descend at the same time, and the progress and proportion of the consumption of the waterproof coating and the waterproof liquid correspond, so that the movable horizontal frame 527 always remains horizontal. The placement position of the movable horizontal frame 527 is used to monitor the consumption and remaining amount of the waterproof coating and the waterproof liquid. When the horizontal frame 528 is tilted, the water stored inside will squeeze the squeezing block 531 and the rubber sealing pad 530 on one side. The pressure sensor 529 is used to feel the pressure when it is tilted, so that the monitoring data is more accurate, and information can be obtained in time when the consumption of the waterproof coating and the waterproof liquid is uneven, so that the equipment can be repaired to prevent the equipment from being blocked and causing uneven thickness of the waterproof material applied and sprayed.

[0071] A drying adjustment mechanism 6 is installed at one end of the top of the frame 1;

[0072] The drying adjustment mechanism 6 includes an upper drying box 601, a lower drying box 602, an air blowing hole 603, a heating plate 604, an axial flow fan 605, a controller 606, a rotating rod 607, a connecting shaft 608, a lower clamping roller 609, an upper clamping roller 610, a supporting block 611, a bracket 612, a connecting spring 613, a protrusion 614, a tension sensor 615, an elastic rope 616, a ventilation cavity 617, a partition 618, an air inlet valve 619, an air inlet pipe 620, an air outlet valve 621 and an air outlet pipe 622;

[0073] The top of the frame 1 is fixedly installed with an upper drying box 601 at a position on one side of the waterproof coating storage box 503, and the bottom of the frame 1 is fixedly installed with a lower drying box 602 at a position corresponding to the upper drying box 601. The bottom of the upper drying box 601 and the top of the lower drying box 602 are both provided with blowing holes 603, and the interiors of the upper drying box 601 and the lower drying box 602 are evenly installed with heating plates 604, and the middle of the top end of the upper drying box 601 and the middle of the bottom end of the lower drying box 602 are both fixedly installed with Axial flow fan 605, a controller 606 is fixedly installed at the top of the frame 1 at one side of the upper drying box 601, and the signal input end and the signal output end of the controller 606 are respectively connected to the information output end of the tension sensor 615 and the heating plate 604 and the signal input end of the axial flow fan 605, and the heating plates 604 are staggeredly distributed inside the upper drying box 601 and the lower drying box 602, and one end of the heating plate 604 has a gap with the inner wall of the upper drying box 601 and the lower drying box 602;

[0074] The two sides of one end of the frame 1 are symmetrically rotatably installed with rotating rods 607, and a connecting shaft 608 is rotatably installed between the ends of the two rotating rods 607 at the same horizontal plane height. A lower clamping roller 609 is fixedly installed in the middle of the lower connecting shaft 608, and an upper clamping roller 610 is fixedly installed in the middle of the upper connecting shaft 608. The surfaces of the rotating rods 607 are fixedly connected with support blocks 611. The top and bottom of both sides of the frame 1 are fixedly installed with brackets 612, and one end of the bracket 612 is fixedly installed with a connecting spring 613. A protrusion 614 is fixedly installed in the middle of one end of the upper connecting shaft 608, and a tension sensor 615 is fixedly installed in the middle of one end of the lower connecting shaft 608. The bottom end of the protrusion 614 is fixedly connected with an elastic rope 61 6. The positions of the lower clamping roller 609 and the upper clamping roller 610 correspond to the upper conveying roller 2 and the lower conveying roller 3 respectively. There is a gap between the lower clamping roller 609 and the upper clamping roller 610. The connecting spring 613 is connected to the support block 611. One end of the elastic rope 616 is connected to the tension sensor 615. The heating plate 604 is used to heat the air entering the upper drying box 601 and the lower drying box 602, and the axial flow fan 605 generates airflow. The hot air will be discharged to the surface of the packaging box sheet through the blowing hole 603 to dry the sprayed and applied waterproof material and accelerate the formation of the waterproof layer. There is a gap between the heating plate 604 and the inner wall of the upper drying box 601 and the lower drying box 602, and the air supply flows, which extends the distance of the airflow and makes it heated thoroughly.

[0075] The lower clamping roller 609 and the upper clamping roller 610 are supported and limited by the connecting spring 613 and the rotating rod 607. The dried packaging box sheet moves between the lower clamping roller 609 and the upper clamping roller 610. The lower clamping roller 609 and the upper clamping roller 610 detect the thickness of the packaging box sheet after the waterproof layer is prepared. When the thickness of the packaging box sheet changes, the lower clamping roller 609 and the upper clamping roller 610 will separate and approach each other, the elastic rope 616 will be deformed, and then the tension sensor 615 will be subjected to different pressures. The pressure data adjusts the power of the heating plate 604 and the axial flow fan 605. When the thickness of the waterproof layer on the surface of the packaging box sheet increases, the information is transmitted to the controller 606 to increase the power of the heating plate 604 and the axial flow fan 605. When the thickness of the waterproof layer on the surface of the packaging box sheet decreases, the controller 606 will reduce the power of the heating plate 604 and the axial flow fan 605. The adjustment is made according to the application of the waterproof layer to prevent unnecessary power and energy waste. The adjustment is more convenient and accurate, which reflects a certain energy-saving concept.

[0076] A ventilation cavity 617 is provided in the middle of the movable connecting rod 511, and a partition 618 is fixedly installed inside the ventilation cavity 617. An air inlet valve 619 is fixedly installed on the top of one end of the upper drying box 601, and one end of the air inlet valve 619 is fixedly connected to an air inlet pipe 620. An air outlet valve 621 is fixedly installed on the bottom of one end of the upper drying box 601, and one end of the air outlet valve 621 is fixedly connected to an air outlet pipe 622. One end of the partition 618 is in contact with the inner wall of the ventilation cavity 617, and a gap is left between the other end of the partition 618 and the inner wall of the ventilation cavity 617. One end of the air inlet pipe 620 extends to the inside of the ventilation cavity 617 and is located on one side of the partition 618. One end of the air outlet pipe 622 extends to the ventilation cavity 617. The interior of the air cavity 617 is located on the other side of the partition 618. The heated air inside the upper drying box 601 is injected into the ventilation cavity 617 from the outlet valve 621 and the outlet pipe 622. The ventilation cavity 617 is separated by the partition 618, so that the hot air flow flows in the ventilation cavity 617 for a period of time and then is re-injected into the upper drying box 601 from the inlet pipe 620 and the inlet valve 619. The hot air flow will heat and keep the movable connecting rod 511 and the metal swing rod 512 warm, and use the heat to heat the waterproof coating that seeps into the waterproof coating storage box 503, so that the coating always remains in a molten state to prevent the coating from being agglomerated due to the influence of external environmental factors.

[0077] According to the above technical solution, a waterproof packaging box is provided, and a box body is obtained according to the above-mentioned waterproof packaging box preparation process.

[0078] The working principle and use process of the present invention are as follows: first, when preparing a sheet material into a waterproof packaging box, a waterproof layer needs to be made on the surface of the sheet material. The sheet material to be made into a waterproof layer is placed between the upper conveying roller 2 and the lower conveying roller 3 on the top of the frame 1. The conveying motor 4 drives the lower conveying roller 3 to rotate continuously to convey the sheet material so that it moves close to the bottom of the coating roller 502. The rotating motor 501 continuously drives the coating roller 502 to rotate. The waterproof coating inside the waterproof coating storage box 503 is evenly adhered to the inside of the coating roller 502 through the penetration strip holes 504. When the coating roller 502 rotates, the waterproof coating will be applied to the top surface of the conveyed packaging box sheet material. At the same time, the atomizing pump 508 will extract and atomize the waterproof liquid inside the waterproof liquid storage box 509, and spray it upward on the bottom surface of the packaging box sheet material through the gas diversion box 505 and the air nozzle 506;

[0079] The arc-shaped extrusion block 515 rotates together with the smear roller 502. During the rotation, the narrower part first fits with the extrusion circular plate 513. As the arc-shaped extrusion block 515 gradually rotates, the thicker part gradually squeezes the extrusion circular plate 513, and the extrusion spring 514 is compressed, pushing the movable link 511 and the metal swing rod 512 to move to one side until the arc-shaped extrusion block 515 no longer fits with the extrusion circular plate 513. The extrusion spring 514 resets and stretches, pushing the movable link 511 and the metal swing rod 512 to move in the opposite direction back to the original position. Then, under the action of the arc-shaped extrusion block 515 and the extrusion spring 514, the movable link 511 and the metal swing rod 512 will scratch the waterproof coating inside the penetration strip hole 504 to prevent it from sticking and clogging.

[0080] The amount of waterproof coating consumed is in a certain proportion. The hydraulic telescopic rod 516 is extended downward at a certain time, driving the piston plate 517 to descend, pressing the waterproof coating inside the waterproof coating storage box 503, pushing down the coating adhered to its inner wall, and preventing condensation and waste caused by long-term adhesion. The upper lifting rod 519 descends together with the piston plate 517, and the upper lifting plate 520 and the right supporting cylinder 521 descend synchronously. The waterproof liquid inside the waterproof liquid storage box 509 is continuously consumed, and the floating plate 524 floats on the surface of the liquid. As the liquid is consumed, it descends, and the lower lifting rod 523 descends therewith, and the lower lifting plate 525 and the left supporting cylinder 526 descend synchronously. The left supporting cylinder 526 and the right supporting cylinder 521 press against the movable horizontal frame 527. The two ends of the horizontal frame 528 are supported. When the heights of the two change, the horizontal height of the movable horizontal frame 527 will change. When the consumption of waterproof coating and waterproof liquid presents a certain ratio, the left supporting cylinder 526 and the right supporting cylinder 521 drop to the same height, and the movable horizontal frame 527 remains horizontal. If the amount of waterproof liquid consumption and extraction changes abnormally, the movable horizontal frame 527 will tilt to one side, and the water inside the horizontal frame 528 will tilt to one side, squeezing the squeezing block 531 and the rubber sealing pad 530 on one side. The pressure sensor 529 feels the pressure, that is, the surface waterproof liquid consumption is abnormal, reminding the staff to carry out maintenance in time to prevent the air nozzle 506 from being blocked or the atomizing pump 508 from being damaged and blocked, resulting in errors in the spraying of the atomized waterproof material.

[0081] After the waterproof layer is applied and sprayed, the lower conveyor roller 3 will continue to convey the sheet forward, the heating plate 604 will heat the air inside the upper drying box 601 and the lower drying box 602, and the axial flow fan 605 will start to generate airflow, blowing the heated gas to the surface of the sheet, drying the waterproof coating applied on the top surface of the sheet and the waterproof liquid sprayed on the bottom surface, accelerating the formation of the waterproof layer, and at the same time, part of the hot air inside the upper drying box 601 is injected into the ventilation inside the movable connecting rod 511 through the outlet valve 621 and the outlet pipe 622. In the cavity 617, the airflow travels along the partition 618 in the ventilation cavity 617, and is discharged into the interior of the upper drying box 601 through the air inlet pipe 620 and the air inlet valve 619, and is heated again to dry the waterproof material of the sheet material. The hot air heats the movable connecting rod 511 and the metal swing rod 512 when it is inside the ventilation cavity 617, and the heat is transferred outward to heat the surrounding waterproof coating. The shape of the waterproof coating is maintained by the heat to prevent the waterproof coating from being affected by external environmental factors and agglomerating.

[0082] The dried sheet material continues to move forward and passes through the middle of the lower clamping roller 609 and the upper clamping roller 610. The lower clamping roller 609 and the upper clamping roller 610 are respectively tightly attached to the bottom and top of the sheet material. The connecting spring 613 and the rotating rod 607 play a role of limiting support for the lower clamping roller 609 and the upper clamping roller 610. When the thickness of the waterproof material applied and sprayed on the surface of the sheet material increases or decreases, the connecting spring 613 is compressed or stretched, and the gap between the lower clamping roller 609 and the upper clamping roller 610 changes. The tension of the elastic rope 616 on the tension sensor 615 will be generated. Changes, according to the increase or decrease in the value of the tension change, the signal is transmitted to the controller 606, and the power of the heating plate 604 and the axial flow fan 605 are adjusted. When the thickness of the waterproof layer increases, the power is increased to make the drying more thorough to prevent the inside from not being thoroughly dried. When the thickness of the waterproof layer decreases, the power is reduced to prevent waste of resources. Then the staff splices and installs the sheets with the waterproof layer prepared to make the corresponding waterproof packaging box, and the sheets used for the packaging box are waterproof on both sides, so that the surface and the inside of the packaging box are waterproof.

[0083] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A process for preparing a waterproof packaging box, characterized in that: The steps include: S1, placing: placing the packaging box sheet material that needs waterproofing treatment at the middle position between the upper conveying roller (2) and the lower conveying roller (3), and the conveying motor (4) drives the lower conveying roller (3) to rotate, so as to convey the sheet material to the bottom of the coating roller (502); S2, coating: the rotating motor (501) drives the coating roller (502) to rotate continuously, the surface of the coating roller (502) is adhered with the waterproof coating inside the waterproof coating storage box (503), and the coating is evenly coated on the top surface of the sheet material during rotation; S3, spraying: the atomizing pump (508) draws out the waterproof liquid in the waterproof liquid storage box (509) and atomizes it, and then sprays it onto the bottom surface of the sheet through the air nozzle (506); S4, monitoring: using the height changes of the right supporting cylinder (521) and the left supporting cylinder (526) to compare the consumption of the waterproof coating and the waterproof liquid, and timely perform maintenance and adjustment when the movable horizontal frame (527) is skewed; S5, drying: the sheet material continues to move forward, and the axial flow fan (605) blows the hot air inside the upper drying box (601) and the lower drying box (602) toward the top and bottom surfaces of the sheet material to dry the waterproof coating and the waterproof liquid; S6, conveying: the dried sheet material moves forward between the upper clamping roller (610) and the lower clamping roller (609), and both sides of the dried sheet material have waterproof boxes, which are removed and spliced ​​and assembled to prepare a waterproof packaging box; Upper conveying rollers (2) are equidistantly mounted on both ends of the top of the frame (1) so as to be rotatably mounted, lower conveying rollers (3) are equidistantly mounted on the top of the frame (1) below the upper conveying rollers (2), a conveying motor (4) is equidistantly mounted on one end of the top of the frame (1), and a uniform spraying mechanism (5) is disposed in the middle of the frame (1); The uniform spraying mechanism (5) comprises a rotating motor (501)); A rotating motor (501) is fixedly mounted in the middle of the frame (1), and a coating roller (502) is fixedly connected to the output shaft of the rotating motor (501); a waterproof coating storage box (503) is fixedly mounted in the middle of the top of the frame (1), and a penetration strip hole (504) is arranged at the bottom of the waterproof coating storage box (503); a gas diversion box (505) is fixedly mounted at the bottom of the middle of the frame (1), and air nozzles (506) are fixedly mounted at equal intervals at the top of the gas diversion box (505); a mounting frame (507) is fixedly mounted at the bottom of the frame (1), and an atomizing pump (508) is fixedly mounted in the middle of the top of the mounting frame (507); a waterproof liquid storage box (509) is fixedly mounted on one side of the bottom of the frame (1), and an infusion tube (510) is fixedly connected to one end of the waterproof liquid storage box (509); A movable connecting rod (511) is movably installed through the bottom of the waterproof coating storage box (503); a metal swing rod (512) is fixedly connected to the bottom end of the movable connecting rod (511) at equal distances; an extrusion circular plate (513) is fixedly connected to one end of the movable connecting rod (511); an extrusion spring (514) is sleeved on one end surface of the movable connecting rod (511); and an arc-shaped extrusion block (515) is fixedly installed on one end surface of the coating roller (502); A hydraulic telescopic rod (516) is fixedly installed on the top of the waterproof coating storage box (503), and a piston plate (517) is fixedly connected to the bottom end of the hydraulic telescopic rod (516). An upper guide cylinder (518) is fixedly installed on one end of the top of the waterproof coating storage box (503), and an upper lifting round rod (519) is movably embedded in the middle of the upper guide cylinder (518). The top of the upper lifting round rod (519) is fixedly connected to an upper lifting plate (520), and one end of the bottom of the upper lifting plate (520) is fixedly connected to a right supporting cylinder (521); A lower guide cylinder (522) is fixedly installed at one end of the top of the waterproof liquid storage box (509); a lower lifting rod (523) is movably embedded in the middle of the lower guide cylinder (522); a floating plate (524) is fixedly connected to the bottom end of the lower lifting rod (523); a lower lifting plate (525) is fixedly connected to the top of the lower lifting rod (523); a left supporting cylinder (526) is fixedly connected to the middle of one end of the lower lifting plate (525); a movable horizontal frame (527) is movably installed between the middle of the right supporting cylinder (521) and the left supporting cylinder (526); a horizontal frame (528) is embedded in the middle of the movable horizontal frame (527); pressure sensors (529) are symmetrically fixedly installed at both ends of the interior of the horizontal frame (528); a rubber sealing pad (530) is fixedly connected to the end of the pressure sensor (529); an extrusion block (531) is fixedly bonded to the surface of the rubber sealing pad (530).

2. The process for preparing a waterproof packaging box according to claim 1, characterized in that: The number of the upper conveying rollers (2), the lower conveying rollers (3) and the conveying motor (4) are the same, the positions of the upper conveying rollers (2) and the lower conveying rollers (3) correspond one to one, and the output shaft of the conveying motor (4) is fixedly connected to one end of the lower conveying roller (3); The smear roller (502), the penetration strip hole (504) and the air nozzle (506) are located on the same vertical plane, the top surface of the smear roller (502) extends to the bottom of the penetration strip hole (504), one end of the infusion tube (510) is connected to the inlet end of the atomizing pump (508), and the outlet end of the atomizing pump (508) and the bottom of the gas diversion box (505) are connected via a pipeline.

3. The process for preparing a waterproof packaging box according to claim 2, characterized in that: The bottom end of the metal swing rod (512) extends to the inside of the penetration strip hole (504), the two ends of the extrusion spring (514) are respectively connected to the surface wall of the waterproof coating storage box (503) and the extrusion circular plate (513), the positions of the arc-shaped extrusion block (515) and the extrusion circular plate (513) correspond to each other, and the thickness between the two ends of the arc-shaped extrusion block (515) tends to increase.

4. The process for preparing a waterproof packaging box according to claim 3, characterized in that: The edge of the piston plate (517) is tightly fitted to the inner wall of the waterproof coating storage box (503), and the bottom end of the upper lifting rod (519) is fixedly connected to the top end of the piston plate (517); The movable horizontal frame (527) has movable grooves symmetrically formed at both ends, the right supporting cylinder (521) and the left supporting cylinder (526) respectively penetrate the two movable grooves, the right supporting cylinder (521) and the left supporting cylinder (526) are located at the same horizontal plane height, and a cavity is left between the two extrusion blocks (531), and the cavity is filled with water.

5. The process for preparing a waterproof packaging box according to claim 3, characterized in that: A drying adjustment mechanism (6) is installed at one end of the top of the frame (1); The drying adjustment mechanism (6) comprises an upper drying box (601); An upper drying box (601) is fixedly installed on the top of the frame (1) at a position on one side of the waterproof coating storage box (503); a lower drying box (602) is fixedly installed on the bottom of the frame (1) at a position corresponding to the upper drying box (601); air blowing holes (603) are provided at the bottom of the upper drying box (601) and the top of the lower drying box (602); heating plates (604) are equidistantly installed inside the upper drying box (601) and the lower drying box (602); an axial flow fan (605) is fixedly installed at the middle of the top end of the upper drying box (601) and the middle of the bottom end of the lower drying box (602); and a controller (606) is fixedly installed on the top of the frame (1) at a position on one side of the upper drying box (601); Rotating rods (607) are symmetrically mounted on both sides of one end of the frame (1); a connecting shaft (608) is rotatably mounted between the ends of the two rotating rods (607) at the same horizontal plane height; a lower clamping roller (609) is fixedly mounted in the middle of the lower connecting shaft (608); an upper clamping roller (610) is fixedly mounted in the middle of the upper connecting shaft (608); a support block (611) is fixedly connected to the surface of the rotating rod (607); brackets (612) are fixedly mounted on the top and bottom of both sides of the frame (1); a connecting spring (613) is fixedly mounted on one end of the bracket (612); a protrusion (614) is fixedly mounted on the middle of one end of the upper connecting shaft (608); a tension sensor (615) is fixedly mounted on the middle of one end of the lower connecting shaft (608); and an elastic rope (616) is fixedly connected to the bottom end of the protrusion (614); A ventilation cavity (617) is provided in the middle of the movable connecting rod (511), a partition (618) is fixedly installed inside the ventilation cavity (617), an air inlet valve (619) is fixedly installed on the top of one end of the upper drying box (601), one end of the air inlet valve (619) is fixedly connected to an air inlet pipe (620), and an air outlet valve (621) is fixedly installed on the bottom of one end of the upper drying box (601), one end of the air outlet valve (621) is fixedly connected to an air outlet pipe (622).

6. The process for preparing a waterproof packaging box according to claim 5, characterized in that: The signal input end and the signal output end of the controller (606) are respectively connected to the information output end of the tension sensor (615) and the heating plate (604) and the signal input end of the axial flow fan (605); the heating plates (604) are staggeredly distributed inside the upper drying box (601) and the lower drying box (602); one end of the heating plate (604) leaves a gap with the inner wall of the upper drying box (601) and the lower drying box (602); The positions of the lower clamping roller (609) and the upper clamping roller (610) correspond to the upper conveying roller (2) and the lower conveying roller (3) respectively, a distance is left between the lower clamping roller (609) and the upper clamping roller (610), the connecting spring (613) and the supporting block (611) are connected, and one end of the elastic rope (616) is connected to the tension sensor (615).

7. The process for preparing a waterproof packaging box according to claim 5, characterized in that: One end of the partition (618) is in contact with the inner wall of the ventilation cavity (617), and a gap is left between the other end of the partition (618) and the inner wall of the ventilation cavity (617); one end of the air inlet pipe (620) extends to the inside of the ventilation cavity (617) and is located at a position on one side of the partition (618); and one end of the air outlet pipe (622) extends to the inside of the ventilation cavity (617) and is located at a position on the other side of the partition (618).

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