A method for producing waterproof and flame-retardant corrugated paper box

Abstract

The invention discloses a method for producing a waterproof and flame-retardant corrugated paper box, and relates to the technical field of corrugated paper box production. The method comprises the following steps: S1, positioning the corrugated paper box: using four conveying and positioning mechanisms to be fixed at the four corners of the corrugated paper box, placing the corrugated paper box horizontally and vertically, and then putting the corrugated paper box and the four conveying and positioning mechanisms into a first track in a conveying device through an input port; S2, applying a waterproof coating; S3, primary drying; S4, applying a flame-retardant coating; S5, secondary drying; S6, thickness detection; S7, corrugated paper box forming; waterproof coating application, primary drying, flame-retardant coating application and secondary drying can be performed in one device, so that the waterproof and flame-retardant treatment of the corrugated paper box can be successful at one time, and by cooperating with a thickness sensor, the finally obtained corrugated paper box has no defective products, and has high efficiency and low labor cost, thereby greatly reducing the production cost of the corrugated paper box.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated paper box production, and in particular to a production method of a waterproof and flame-retardant corrugated paper box. Background Art

[0002] Corrugated paper boxes are widely used in commodity packaging and are also often used to store commodities. Therefore, the waterproof and flame-retardant function of corrugated paper boxes is very important. Corrugated paper boxes are made by folding, bending, cutting and nailing corrugated cardboard. Therefore, the production of waterproof and flame-retardant corrugated paper boxes must first produce waterproof and flame-retardant corrugated cardboard.

[0003] The existing publication number CN111136959A discloses a preparation process of a multi-layer waterproof and flame-retardant corrugated paperboard. In the preparation process of the waterproof and flame-retardant corrugated paperboard, a waterproof coating is first sprayed on the corrugated paperboard, and then the flame-retardant corrugated paper sprayed with the waterproof coating is transferred to a dryer for drying, and then transferred to another set of equipment for spraying of the flame-retardant layer. After completion, the paperboard is further transferred to a dryer for drying. During the entire production process of the waterproof and flame-retardant corrugated paperboard, the corrugated paperboard needs to be repeatedly transferred, the production efficiency of the corrugated paperboard is very low, and there is no monitoring mechanism, so the quality of the finished product of the waterproof and flame-retardant corrugated paperboard cannot be controlled. Summary of the invention

[0004] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a method for producing a waterproof and flame-retardant corrugated paper box, which can carry out waterproof coating coating, primary drying, flame-retardant coating coating and secondary drying in one device, so that the waterproof and flame-retardant treatment of the corrugated paper box can be successful at one time, and by cooperating with a thickness sensor, the final corrugated paper box has no defective products, and has high efficiency and low labor cost, which greatly reduces the production cost of the corrugated paper box.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A method for producing a waterproof and flame-retardant corrugated paper box, the method comprising the following steps:

[0007] S1. Positioning of corrugated cardboard: Use four conveying and positioning mechanisms to fix the four corners of the corrugated cardboard, place the corrugated cardboard horizontally and vertically, and then put the corrugated cardboard and the four conveying and positioning mechanisms into the first track of the conveying equipment through the input port;

[0008] S2, waterproof coating coating: a layer of waterproof coating is evenly coated on both sides of the corrugated paperboard. After the waterproof coating is applied, the corrugated paperboard is transported to the junction of the first track and the second track by the transport positioning mechanism, and the transport positioning mechanism is transferred to the second track by the rotating track, so that the corrugated paperboard enters the second track;

[0009] S3, primary drying: using a hot air dryer to dry the multiple pieces of corrugated cardboard on the second track for 45 minutes, and then conveying the dried multiple pieces of corrugated cardboard to the third track in sequence;

[0010] S4, flame retardant coating coating: a layer of flame retardant coating is evenly coated on both sides of the corrugated paperboard. After the flame retardant coating is applied, the corrugated paperboard is conveyed to the fourth track through the conveying and positioning mechanism, so that the corrugated paperboard enters the fourth track;

[0011] S5, secondary drying: using a hot air dryer to perform secondary drying treatment on the multiple pieces of corrugated cardboard on the fourth track for 30 minutes, and then conveying the dried multiple pieces of corrugated cardboard to the fourth track in sequence;

[0012] S6, thickness detection: detect the corrugated cardboard after secondary drying. For the corrugated cardboard with a coating thickness greater than or equal to 4 mm, the corrugated cardboard is transported to the fifth track through the transport positioning mechanism and transported out from the output port. A thickness sensor is installed on the side of the fourth track near the fifth track to detect the thickness of the corrugated cardboard. For the corrugated cardboard with a coating thickness less than 4 mm, it is transported back to the first track for cyclic processing;

[0013] S7, corrugated cardboard boxing: fold, bend, cut and nail the corrugated cardboard delivered from the output port to make it into corrugated paper boxes, and then pack the corrugated paper boxes.

[0014] As a further solution of the present invention: the waterproof coating is a pure acrylic polymer emulsion.

[0015] As a further solution of the present invention: a thickness sensor is installed on the side of the fourth track near the fifth track to detect the thickness of the corrugated cardboard.

[0016] As a further solution of the present invention: the operating temperature of the hot air dryer in S3 is 110 degrees Celsius.

[0017] As a further solution of the present invention: the flame retardant coating is ammonium polyphosphatidic acid APP, modified tripolyammonium nitrogen MCA, decabromodiphenyl ether or antimony trioxide.

[0018] As a further solution of the present invention: the number of the rotating tracks is multiple groups, which are respectively arranged at the intersections between the first track, the second track, the third track, the fourth track and the fifth track.

[0019] As a further solution of the present invention: the operating temperature of the hot air dryer in S5 is 125 degrees Celsius.

[0020] As a further solution of the present invention: in S3 and S5, the plurality of corrugated cardboards are arranged at equal intervals in the horizontal direction on the second track and the fourth track.

[0021] As a further solution of the present invention: the time for the corrugated cardboard to move on the second track is 30 minutes to 60 minutes, and the time for the corrugated cardboard to move on the fourth track is 20 minutes to 40 minutes.

[0022] As a further solution of the present invention: the conveying and positioning mechanism includes a conveying base, track wheels are installed at both ends of the bottom surface of the conveying base through a rotating shaft, a positioning card is movably connected to the top of the conveying base, the positioning card is L-shaped and is used to be clamped in the corner position of the corrugated cardboard, and distance rods are fixedly connected at both ends of the conveying base, and a rubber head is fixedly connected to the end of the distance rod away from the conveying base.

[0023] As a further solution of the present invention: a limiting groove is opened in the middle position of the bottom surface of the conveying base, and a guide wheel is installed on the side wall of the limiting groove. A rotating seat is installed through a bearing at the bottom surface of the rotating track near the inside of the conveying equipment. The rotating seat is rotatably connected to the rotating track. The rotating seat is circular, and a driving rack is engaged on the side of the rotating seat. The driving rack is driven by a driving hydraulic cylinder. A limiting slider is fixedly connected on both sides of the rotating track. A limiting slide groove is opened inside the conveying equipment near the limiting slider, and the trajectory of the limiting slide groove is spiral.

[0024] Beneficial effects of the present invention:

[0025] 1. In the present invention, through the production method of waterproof and flame-retardant corrugated paper boxes, waterproof coating coating, primary drying, flame-retardant coating coating and secondary drying can be carried out in one device, so that the waterproof and flame-retardant treatment of the corrugated paper boxes can be successful at one time, and by cooperating with a thickness sensor, the final corrugated paperboard box has no defective products, and has high efficiency and low labor cost, which greatly reduces the production cost of the corrugated paperboard.

[0026] 2. In the present invention, the conveying equipment is provided, and since the first track, the second track, the third track, and the fourth track form a ring, the space occupied by the conveying equipment is saved, and through the cooperation of the conveying positioning mechanism and the rotating track, the corrugated cardboard can be automatically waterproofed and flame-retarded without manual adjustment, which greatly improves the production efficiency of the corrugated cardboard. A sealing plate is installed at the side of the conveying equipment at the position of the output port, and the sealing plate is driven horizontally by a hydraulic cylinder to seal the output port to prevent the corrugated cardboard from being radiated when the corrugated cardboard is dried on the fourth track, thereby saving energy loss.

[0027] 3. In the present invention, the time for putting the corrugated paperboards from the input port can be adjusted according to the number of corrugated paperboards on the second track and the fourth track, without adding an additional control mechanism, thus saving equipment investment and reducing the cost of producing waterproof and flame-retardant corrugated paperboard boxes.

[0028] 4. In the present invention, by setting up a rotating track, the driving hydraulic cylinder is opened, the driving hydraulic cylinder will push the driving rack, the driving rack drives the rotating seat to rotate, and the rotating rotating seat drives the rotating track to rotate. During the rotation of the rotating track, the limiting slider will cooperate with the limiting slide groove to make the rotating track rotate in an inclined manner, so that the rotating track rotates ninety degrees, ensuring that the rotating track can be aligned with another track. Under the action of inertia, the conveying positioning mechanism can realize automatic track conversion.

[0029] 5. In the present invention, the distance between multiple pieces of corrugated cardboard can be ensured by setting the distance rods and rubber heads. For the second track and the fourth track, the distance rods and rubber heads on both sides of the conveying base can ensure the horizontal spacing between multiple pieces of corrugated cardboard. When the hot air dryer is working, it can ensure that the hot air is evenly distributed among the multiple pieces of corrugated cardboard, thereby improving the drying efficiency of the corrugated cardboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Figure 1 This is a process flow chart for producing a waterproof and flame-retardant corrugated paper box in the present invention;

[0032] Figure 2 It is a structural schematic diagram of the equipment for producing waterproof and flame-retardant corrugated paper boxes in the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the conveying track in the present invention;

[0034] Figure 4 It is a structural schematic diagram of the rotating track in the present invention;

[0035] Figure 5 is a top view of the rotating track in the present invention;

[0036] Figure 6 It is a front view of the conveying and positioning mechanism in the present invention.

[0037] In the figure: 1. conveying equipment; 11. first track; 12. second track; 13. third track; 14. fourth track; 15. fifth track; 2. input port; 3. output port; 4. sealing plate; 5. conveying positioning mechanism; 51. conveying base; 52. track wheel; 53. positioning card; 531. connecting rod; 532. connecting ball; 54. distance rod; 55. rubber head; 56. limiting groove; 57. guide wheel; 6. rotating seat; 7. driving rack; 71. driving hydraulic cylinder; 8. rotating track; 81. limiting slider; 82. telescopic block. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1-Figure 6 As shown, a method for producing a waterproof and flame-retardant corrugated paper box is provided. When it is necessary to produce a waterproof and flame-retardant corrugated paper box, the corrugated paperboard can be produced and processed according to the following steps:

[0040] S1. Positioning of corrugated cardboard: Take a piece of corrugated cardboard, and use four conveying and positioning mechanisms 5 to fix it at the four corners of the corrugated cardboard, that is, use positioning cards 53 to clamp the edge of the corrugated cardboard. Since the strength of the corrugated cardboard is not high, the connecting rod 531 is used as the supporting skeleton of the conveying and positioning mechanism 5 to ensure that the corrugated cardboard is bent and deformed during the movement. The corrugated cardboard is placed horizontally and vertically, and then the corrugated cardboard and the four conveying and positioning mechanisms 5 are placed on the first track 11 in the conveying device 1 through the input port 2, so that the track wheel 52 cooperates with the first track 11 to fix the four conveying and positioning mechanisms 5. Since a limiting groove 56 is provided in the middle position of the bottom surface of the conveying base 51, the shifting rod can be driven by a belt, and the shifting rod is inserted into the limiting groove 56 to drive the conveying base 51, providing power for the movement of the conveying base 51;

[0041] S2, waterproof coating: a layer of pure acrylic polymer emulsion coating is evenly coated on both sides of the corrugated paperboard. After the pure acrylic polymer emulsion coating is applied, the corrugated paperboard is conveyed to the junction of the first track 11 and the second track 12 by the conveying and positioning mechanism 5, and then the hydraulic push rod driving the telescopic block 82 is opened to make the telescopic block 82 snap into the limiting groove 56, fix the position of the conveying base 51, and transfer the conveying and positioning mechanism 5 to the second track 12 by the rotating track 8, so that the corrugated paperboard enters the second track 12;

[0042] S3, primary drying: using a hot air dryer to dry the multiple corrugated cardboards on the second track 12 at 45°C, the working temperature of the hot air dryer is 110°C, and then the dried multiple corrugated cardboards are sequentially transported to the third track 13;

[0043] S4, flame retardant coating: a layer of ammonium polyphosphatidic acid APP coating is evenly coated on both sides of the corrugated paperboard. After the ammonium polyphosphatidic acid APP coating is completed, the corrugated paperboard is conveyed to the fourth track 14 by the conveying and positioning mechanism 5, so that the corrugated paperboard enters the fourth track 14;

[0044] S5, secondary drying: using a hot air dryer to perform secondary drying treatment on the multiple pieces of corrugated cardboard on the fourth track 14 for 30 minutes, the working temperature of the hot air dryer is 130 degrees Celsius, and then the dried multiple pieces of corrugated cardboard are sequentially conveyed to the fourth track 14;

[0045] S6, thickness detection: detect the corrugated cardboard after secondary drying. For the corrugated cardboard with a coating thickness greater than or equal to 4 mm, the corrugated cardboard is transported to the fifth track 15 through the transport positioning mechanism 5 and transported out from the output port 3. A thickness sensor is installed on the side of the fourth track 14 near the fifth track 15 to detect the thickness of the corrugated cardboard. For the corrugated cardboard with a coating thickness less than 4 mm, it is transported back to the first track 11 and re-waterproofed and flame-retarded by the first track 11;

[0046] S7, corrugated cardboard boxing: fold, bend, cut and nail the corrugated cardboard delivered from the output port 3 to make it into a corrugated cardboard box, and then pack the corrugated cardboard box. The final corrugated cardboard box has no defective products, high efficiency and low labor cost, which greatly reduces the production cost of the corrugated cardboard.

[0047] like Figure 2-Figure 6As shown, the conveying device 1 is composed of a first track 11, a second track 12, a third track 13, a fourth track 14 and a fifth track 15, wherein the first track 11, the third track 13 and the fifth track 15 are double-layer single tracks, and the second track 12 and the fourth track 14 are double-layer double tracks. An input port 2 is provided on the side of the conveying device 1 near the first track 11, and an output port 3 is provided near the fifth track 15. The input port 2 is used to convey the unprocessed corrugated cardboard to the conveying device 1 for waterproof and flame retardant treatment, and the output port 3 is used to output the processed waterproof and flame retardant corrugated cardboard. Since the first track 11, the second track 12, the third track 13, and the fourth track 14 form a ring, the space occupied by the conveying device 1 is saved, and through the cooperation of the conveying positioning mechanism 5 and the rotating track 8, the corrugated cardboard can be automatically waterproofed and flame-retardant, without manual adjustment, which greatly improves the production efficiency of the corrugated cardboard. A sealing plate 4 is installed at the position of the output port 3 on the side of the conveying device 1. The sealing plate 4 is driven horizontally by a hydraulic cylinder to seal the output port 3 to prevent the corrugated cardboard from emitting heat when the corrugated cardboard is dried on the fourth track 14, thereby saving energy loss.

[0048] A thickness sensor is installed on the side of the fourth track 14 near the fifth track 15 to detect the thickness of the corrugated cardboard. The number of rotating tracks 8 is multiple, which are respectively arranged at the intersections between the first track 11, the second track 12, the third track 13, the fourth track 14 and the fifth track 15. Multiple pieces of corrugated cardboard are arranged at equal intervals in the horizontal direction on the second track 12 and the fourth track 14. The time for the corrugated cardboard to move on the second track 12 is 30 minutes to 60 minutes, and the time for the corrugated cardboard to move on the fourth track 14 is 20 minutes to 40 minutes.

[0049] Preferably, the moving time on the second track 12 is 45 minutes, and the moving time on the fourth track 14 is 30 minutes. Therefore, the time for putting the corrugated cardboard from the input port 2 can be adjusted according to the number of corrugated cardboards on the second track 12 and the fourth track 14. There is no need to add additional control mechanisms, which saves equipment investment and reduces the cost of producing waterproof and flame-retardant corrugated cardboard boxes.

[0050] The conveying and positioning mechanism 5 includes a conveying base 51, and track wheels 52 are installed at both ends of the bottom surface of the conveying base 51 through a rotating shaft. A positioning card 53 is movably connected to the top of the conveying base 51. The positioning card 53 is in an L-shaped shape and is used to be stuck in the corner position of the corrugated cardboard. The two ends of the conveying base 51 are fixedly connected to a distance rod 54, and the end of the distance rod 54 away from the conveying base 51 is fixedly connected to a rubber head 55. The inner side of the positioning card 53 is provided with a card groove that fits with the corrugated cardboard. The side of the positioning card 53 is fixedly connected to a connecting rod 531, and the connecting rod 531 is used to dock with another group of positioning cards 53 to ensure that the four positioning cards 53 can form a whole. The center position of the bottom surface of the positioning card 53 is fixedly connected to a connecting ball 532, and the top surface of the conveying base 51 is close to the connecting rod 531. A spherical groove that fits with the connecting ball 532 is provided near the connecting ball 532, and a ball is installed inside the spherical groove to reduce the friction between the connecting ball 532 and the spherical groove. A limiting groove 56 is provided in the middle of the bottom surface of the conveying base 51, and a guide wheel 57 is installed on the side wall of the limiting groove 56. A rotating seat 6 is installed through a bearing at the bottom surface of the rotating track 8 inside the conveying device 1. The rotating seat 6 is rotatably connected to the rotating track 8. The rotating seat 6 is circular, and a driving rack 7 is meshed on the side of the rotating seat 6. The driving rack 7 is driven by a driving hydraulic cylinder 71. A limiting slider 81 is fixedly connected to both sides of the rotating track 8. A limiting slide groove is provided near the limiting slider 81 inside the conveying device 1, and the trajectory of the limiting slide groove is spiral.

[0051] When working, the driving hydraulic cylinder 71 is turned on, the driving hydraulic cylinder 71 will push the driving rack 7, the driving rack 7 drives the rotating seat 6 to rotate, and the rotating rotating seat 6 drives the rotating track 8 to rotate. During the rotation of the rotating track 8, the limiting slider 81 will cooperate with the limiting slide groove to make the rotating track 8 rotate in an inclined manner, so that the rotating track 8 rotates ninety degrees, ensuring that the rotating track 8 can be aligned with another track. Under the action of inertia, the conveying positioning mechanism 5 can realize automatic track switching;

[0052] In addition, two groups of telescopic blocks 82 perpendicular to the track direction are installed on the top surface of the rotating track 8. The telescopic blocks 82 are driven by a hydraulic push rod. The width of the telescopic blocks 82 is equal to the distance between the two groups of guide wheels 57. Before rotating the rotating track 8, the telescopic blocks 82 are first driven by the hydraulic push rod to make the telescopic blocks 82 stuck in the limit groove 56 to fix the position of the conveying base 51. When the rotating track 8 is rotated to the inclined position, the telescopic blocks 82 can be opened to ensure that the conveying base 51 can slide along the inclined direction of the rotating track 8.

[0053] For the first track 11, the third track 13 and the fifth track 15, the distance rods 54 and the rubber heads 55 on both sides of the conveying base 51 can ensure the distance between the multiple pieces of corrugated cardboards. For the second track 12 and the fourth track 14, the distance rods 54 and the rubber heads 55 on both sides of the conveying base 51 can ensure the horizontal spacing between the multiple pieces of corrugated cardboards. When the hot air dryer is working, it can ensure that the hot air is evenly distributed among the multiple pieces of corrugated cardboards, thereby improving the drying efficiency of the corrugated cardboards.

[0054] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for producing a waterproof and flame-retardant corrugated paper box, characterized in that: The following steps are involved: S1. Corrugated cardboard positioning: four conveying and positioning mechanisms (5) are fixed at the four corners of the corrugated cardboard, the corrugated cardboard is placed horizontally and vertically, and then the corrugated cardboard and the four conveying and positioning mechanisms (5) are placed on the first track (11) in the conveying device (1) through the input port (2); the conveying and positioning mechanisms (5) include a conveying base (51), the bottom ends of the conveying base (51) are provided with track wheels (52) via a rotating shaft, the top of the conveying base (51) is movably connected with a positioning card (53), the positioning card (53) is L-shaped and is used to be clamped at the corner of the corrugated cardboard, and the two ends of the conveying base (51) are fixedly connected with A distance rod (54), wherein one end of the distance rod (54) away from the conveying base (51) is fixedly connected to a rubber head (55); a card slot that fits with the corrugated cardboard is provided on the inner side of the positioning card (53); a connecting rod (531) is fixedly connected to the side of the positioning card (53); the connecting rod (531) is used to connect with another set of positioning cards (53); a connecting ball (532) is fixedly connected to the center of the bottom surface of the positioning card (53); a round ball groove that fits with the connecting ball (532) is provided on the top surface of the conveying base (51) near the connecting ball (532); a ball is also installed inside the round ball groove to reduce the friction between the connecting ball (532) and the round ball groove; S2. Waterproof coating: a layer of waterproof coating is uniformly coated on both sides of the corrugated paperboard. After the waterproof coating is applied, the corrugated paperboard is transported to the intersection of the first track (11) and the second track (12) by the transport positioning mechanism (5), and the transport positioning mechanism (5) is transferred to the second track (12) by the rotating track (8), so that the corrugated paperboard enters the second track (12); the number of the rotating tracks (8) is a plurality of groups, which are respectively arranged at the intersections between the first track (11), the second track (12), the third track (13), the fourth track (14) and the fifth track (15); the transport device (1) is composed of the first track (11), the second track (12), the third track (13), the fourth track (14) and the fifth track (15). The conveying device (1) is composed of four tracks (14) and a fifth track (15), wherein the first track (11), the second track (12), the third track (13) and the fourth track (14) form a ring; wherein the first track (11), the third track (13) and the fifth track (15) are double-layer single tracks, and the second track (12) and the fourth track (14) are double-layer double tracks; an input port (2) is provided on the side of the conveying device (1) near the first track (11), and an output port (3) is provided near the fifth track (15); the input port (2) is used to convey unprocessed corrugated paperboard to the conveying device (1) for waterproof and flame-retardant treatment, and the output port (3) is used to output the processed waterproof and flame-retardant corrugated paperboard; S3, primary drying: using a hot air dryer to dry the plurality of corrugated cardboards on the second track (12) for 30 to 60 minutes, and then sequentially conveying the dried plurality of corrugated cardboards to the third track (13); S4, flame retardant coating: a layer of flame retardant coating is evenly coated on both sides of the corrugated paperboard. After the flame retardant coating is applied, the corrugated paperboard is conveyed to the fourth track (14) by the conveying and positioning mechanism (5), so that the corrugated paperboard enters the fourth track (14); a thickness sensor is installed on the side of the fourth track (14) near the fifth track (15) for detecting the thickness of the corrugated paperboard; S5, secondary drying: using a hot air dryer to perform secondary drying treatment on the plurality of corrugated paperboards on the fourth track (14) for 20 minutes to 40 minutes; the time for the corrugated paperboards to move on the second track (12) is 30 minutes to 60 minutes, and the time for the corrugated paperboards to move on the fourth track (14) is 20 minutes to 40 minutes; S6, thickness detection: detect the corrugated cardboard after secondary drying. For the corrugated cardboard with a coating thickness greater than or equal to 4 mm, the corrugated cardboard is transported to the fifth track (15) through the transport positioning mechanism (5) and transported out from the output port (3). For the corrugated cardboard with a coating thickness less than 4 mm, it is transported back to the first track (11) for cyclic processing; S7, corrugated cardboard boxing: folding, bending, cutting and nailing the corrugated cardboard delivered from the output port (3) to make a corrugated cardboard box, and then packing the corrugated cardboard box.

2. The method for producing a waterproof and flame-retardant corrugated paper box according to claim 1, characterized in that: The waterproof coating is pure acrylic polymer emulsion.

3. The method for producing a waterproof and flame-retardant corrugated paper box according to claim 1, characterized in that: The working temperature of the hot air dryer in S3 is 100 degrees Celsius to 120 degrees Celsius.

4. The method for producing a waterproof and flame-retardant corrugated paper box according to claim 1, characterized in that: The flame retardant coating is ammonium polyphosphatidic acid APP, modified tripolyammonium nitrogen MCA, decabromodiphenyl ether or antimony trioxide.

5. The method for producing a waterproof and flame-retardant corrugated paper box according to claim 1, characterized in that: The operating temperature of the hot air dryer in S5 is 120 degrees Celsius to 130 degrees Celsius.

6. The method for producing a waterproof and flame-retardant corrugated paper box according to claim 1, characterized in that: In S3 and S5, the plurality of corrugated cardboards are arranged at equal intervals in the horizontal direction on the second track (12) and the fourth track (14).

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