An automated production line for corrugated cardboard boxes

Abstract

This invention discloses an automated production line for corrugated cardboard boxes, comprising a steel structure support frame one and material rolls; a raw material conveying device arranged in a linear array on one side of the steel structure support frame one; a preheating zone located on the upper part of the steel structure support frame; and a second steel structure support frame located on one side of the steel structure support frame one. By incorporating a slitting device one, a single-face corrugating machine two, and a laminating device, compared with existing technologies, the single-face corrugating machine one and the single-face corrugating machine two can be used to separately form a corrugated paper core support layer one and a corrugated paper core support layer two. These layers are then hot-pressed together by the laminating device to form a 3-5-3 structure corrugated cardboard. This results in a five-layer reinforced structure at the bottom, sides, and other critical stress-bearing parts of the final corrugated cardboard box, increasing load-bearing strength without the need for additional support components, and reducing material costs and process complexity.

Description

Technical Field

[0001] This invention relates to the field of corrugated cardboard box production line technology, and in particular to an automated corrugated cardboard box production line. Background Technology

[0002] Corrugated cardboard boxes are a commonly used packaging material, and their production process usually involves multiple paper feeding, preheating, corrugating, laminating, and slitting processes.

[0003] Traditional production lines typically process corrugated cardboard with a fixed number of three or five layers. Using five layers of corrugated cardboard in areas where reinforcement is unnecessary leads to material waste and increased costs; while in areas requiring reinforcement, three layers of corrugated cardboard often provide insufficient support. Therefore, current reinforcement methods often involve adding supports to critical areas such as the load-bearing surfaces of the box to address stress concentration-induced deformation, damage, and insufficient structural strength. Current practices usually involve adding rivets and adhesives to these critical surfaces, but this requires additional steps such as drilling, gluing, and fixing, extending the production cycle and increasing material consumption. Furthermore, manual operation can easily lead to misalignment of the supports, affecting structural stability; adhesives are susceptible to delamination due to environmental temperature and humidity, and rivet connections may loosen due to paper fiber breakage, thus reducing the overall impact resistance and durability of the packaging structure. Therefore, designing an automated corrugated cardboard box production line to solve these problems is particularly important. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide an automated production line for corrugated cardboard boxes.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] An automated production line for corrugated cardboard boxes includes a steel structure support frame and a roll of material.

[0007] A raw material conveying device is arranged in a linear array on one side of the steel structure support frame;

[0008] A preheating zone is located on the upper part of the steel structure support frame one;

[0009] A second steel structure support frame is provided on one side of the first steel structure support frame. The second steel structure support frame is provided with a first single-sided corrugating machine, a second single-sided corrugating machine, a slitting device 1 located at the output end of the second single-sided corrugating machine, and a conveying assembly 1.

[0010] An overpass is installed on one side of the steel structure support frame II along the output direction. The overpass is equipped with a composite device, a cutting device II, an indentation device, and a conveying assembly II.

[0011] It also includes a PLC controller and a display touch screen, which are used to monitor the overall operation of the device and observe production information.

[0012] According to the aforementioned automated corrugated cardboard box production line, the number of raw material conveying devices is five sets. The five sets of raw material conveying devices are arranged in a linear array from left to right on one side of the steel structure support frame. Each raw material conveying device includes a base plate, a drive mechanism and a feeding rack disposed on the base plate, and the material rolls are installed on the feeding rack. The material rolls, from left to right, are the bottom paper roll, the first corrugated paper roll, the middle face paper roll, the second corrugated paper roll, and the top paper roll.

[0013] According to the aforementioned automated corrugated cardboard box production line, the preheating zone is provided with partitions arranged in a linear array. The partitions divide the preheating zone from left to right into a first preheating chamber, a second preheating chamber, a third preheating chamber, a fourth preheating chamber, and a fifth preheating chamber. The first, second, third, fourth, and fifth preheating chambers are provided with vertically penetrating conveying channels that allow the paper roll of material to pass through and enter the preheating zone.

[0014] According to the aforementioned automated corrugated cardboard box production line, a conveying assembly three is provided on the steel structure support frame one, inside the preheating zone, and above the preheating zone. The conveying assembly three includes a column, a cylinder bolted to the column, a U-shaped support located at the output end of the cylinder, a rotating shaft one overlapping the inner wall of the U-shaped support, a rotating shaft two rotatably connected to the column, and an upper conveying roller and a lower conveying roller respectively arranged vertically on the outer walls of the rotating shaft two and the rotating shaft one.

[0015] According to the aforementioned automated corrugated cardboard box production line, the working principle and structure of conveying component one and conveying component two are consistent with the working principle and structure of conveying component three.

[0016] According to the aforementioned automated production line for corrugated cardboard boxes, the slitting device includes a support truss guide rail, a cutter adjustment assembly 1 symmetrically mounted on the support truss guide rail, and a cutter adjustment assembly 2.

[0017] According to the aforementioned automated corrugated cardboard box production line, the working principle and structure of the second slitting device are consistent with those of the first slitting device.

[0018] The automated corrugated cardboard box production line also includes a temperature control system.

[0019] A production method, specifically including the following steps:

[0020] S1. The bottom paper roll, the first corrugated paper roll, the middle face paper roll, the second corrugated paper roll, and the top paper roll are respectively conveyed to the first preheating chamber, the second preheating chamber, the third preheating chamber, the fourth preheating chamber, and the fifth preheating chamber for preheating using the raw material conveying device.

[0021] S2. The preheated first corrugated paper roll and the middle face paper roll are both fed to the first single-face corrugator for corrugating, gluing and pressing, so that the first corrugated paper roll and the middle face paper roll are formed as one piece, that is, the first corrugated paper core support layer. At the same time, the preheated second corrugated paper roll and the top face paper roll are both fed to the second single-face corrugator for corrugating, gluing and pressing, so that the second corrugated paper roll and the top face paper roll are formed as one piece, that is, the second corrugated paper core support layer.

[0022] S3. The corrugated paper core support layer 2, which is formed as one piece after being processed by the single-sided corrugating machine 2, is output from the output end of the single-sided corrugating machine 2 and is conveyed to the slitting device 1 via the conveying assembly 1. The slitting device 1 cuts the two sides of the corrugated paper core support layer 2 formed as one piece to form a corrugated paper core support layer 2 of a certain width.

[0023] S4. The bottom paper roll, corrugated paper core support layer one, and corrugated paper core support layer two are all fed to the composite device for gluing and hot pressing to finally form a paperboard structure.

[0024] S5. After being coated with glue and hot-pressed, the cardboard structure is conveyed to the slitting device 2 via the conveying assembly 2. The slitting device 2 cuts the cardboard structure in length.

[0025] S6. The cardboard structure after being cut by the slitting device 2 is conveyed to the creasing device by the conveying assembly 2, and the creasing device creasing the cardboard structure.

[0026] S7. Finally, the cardboard structure is folded by an external folding device to form a corrugated carton.

[0027] The above-mentioned solution has the following beneficial effects:

[0028] 1. By setting up a slitting device, a single-face corrugating machine, and a composite device, compared with the existing technology, the single-face corrugating machine can form a corrugated paper core support layer 1 and a corrugated paper core support layer 2 respectively, and then heat-press them together through the composite device to form a 3-5-3 structure corrugated cardboard. This results in a five-layer reinforced structure at the bottom, sides, and other key stress-bearing parts of the final corrugated carton, which can improve load-bearing strength without the need for additional support components, and reduces material costs and process complexity.

[0029] 2. Compared with existing technologies, the slitting device on this production line uses a servo motor and a double-threaded screw to quickly adjust the cutting blade spacing, adapt to the production needs of different product specifications, and expand the applicability of the production line. At the same time, the overall structure of this production line is compact, and the connection between each process is smooth, which significantly improves the production efficiency, structural strength and cost advantage of corrugated boxes.

[0030] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0032] Figure 1 This is a schematic diagram of the overall structure of an automated corrugated cardboard box production line according to the present invention;

[0033] Figure 2 This is a top view schematic diagram of the overall structure of an automated corrugated cardboard box production line according to the present invention;

[0034] Figure 3 This is a schematic diagram of the overall front view structure of an automated corrugated cardboard box production line according to the present invention;

[0035] Figure 4 This is a structural schematic diagram of the steel structure support frame 2 of an automated corrugated cardboard box production line according to the present invention;

[0036] Figure 5 This invention relates to an automated production line for corrugated cardboard boxes. Figure 4 Enlarged structural diagram at point A in the middle;

[0037] Figure 6 This invention relates to an automated production line for corrugated cardboard boxes. Figure 4 Enlarged structural diagram at point B.

[0038] Legend:

[0039] 1. Steel structure support frame one; 2. Material rolls; 201. Bottom paper roll; 202. First corrugated paper roll; 203. Middle face paper roll; 204. Second corrugated paper roll; 205. Top paper roll; 3. Raw material conveying device; 31. Base plate; 32. Drive mechanism; 33. Loading rack; 4. Preheating zone; 41. First preheating chamber; 42. Second preheating chamber; 43. Third preheating chamber; 44. Fourth preheating chamber; 45. Fifth preheating chamber; 5. Steel structure support frame two; 6. Single-face corrugating machine one; 7. Single-face corrugating machine two; 8. Slitting and packing unit. 81. Support truss guide rail; 82. Cutter adjustment assembly one; 83. Cutter adjustment assembly two; 9. Conveying assembly one; 10. Overpass; 11. Composite device; 12. Slitting device two; 13. Indentation device; 14. Conveying assembly two; 15. Display touch screen; 16. Divider plate; 17. PLC controller; 18. Conveying assembly three; 181. Column; 182. Cylinder; 183. U-shaped support; 184. Rotating shaft one; 185. Rotating shaft two; 186. Upper conveyor roller; 187. Lower conveyor roller; 19. Conveying channel. Detailed Implementation

[0040] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Reference Figures 1-6 An automated corrugated carton production line includes a steel structure support frame 1 and material rolls 2; a raw material conveying device 3, which is arranged in a linear array on one side of the steel structure support frame 1; a preheating zone 4, which is located on the upper part of the steel structure support frame 1; a second steel structure support frame 5, which is located on one side of the steel structure support frame 1, and is equipped with a single-face corrugator 6, a second single-face corrugator 7, a slitting device 8 located at the output end of the second single-face corrugator 7, and a conveying assembly 9; and a bridge 10, which is located on one side of the steel structure support frame 2 along the output direction, and is equipped with a composite device 11, a second slitting device 12, a creasing device 13, and a second conveying assembly 14.

[0044] In this embodiment, it should be noted that both the single-face corrugating machine 6 and the single-face corrugating machine 7 are existing technologies, therefore, their structures will not be described in detail. The single-face corrugating machine 6 has an upper corrugating roller and a lower corrugating roller inside, and a glue-applying roller is located below the lower corrugating roller. The upper and lower corrugating rollers can press the first corrugated paper roll 202 together, thus pressing the first corrugated paper roll 202 into a wavy corrugated shape. The glue-applying roller can apply adhesive to the corrugated peaks of the pressed first corrugated paper roll 202. Then, the first corrugated paper roll 202 and the intermediate facing paper roll 203 are conveyed to the gap between the upper and lower pressure rollers inside the single-face corrugating machine 6. The intermediate facing paper roll 203 is located on top of the first corrugated paper roll 202. Finally, the two are hot-pressed by the single-face corrugator 6 to form an integral corrugated paper core support layer 1. The working principle and structure of the single-face corrugator 7 are the same as those of the single-face corrugator 6. The second corrugated paper roll 204 and the top paper roll 205 are hot-pressed by the single-face corrugator 7 to form an integral corrugated paper core support layer 2 according to the same process. The bottom paper roll 201, the first corrugated paper roll 202, the middle paper roll 203, the second corrugated paper roll 204 and the top paper roll 205 can be conveyed to the preheating zone 4 for preheating through the raw material conveying device 3. After being preheated in the preheating zone 4, the bottom paper roll 201, the first corrugated paper roll 202, the middle paper roll 203, the second corrugated paper roll 204 and the top paper roll 205 are conveyed separately.

[0045] It also includes a PLC controller 17 and a display touch screen 15, which are used to monitor the overall operation of the device and observe production information.

[0046] In this embodiment, all equipment on the production line is electrically connected to the PLC controller 17 and the display touch screen 15. The PLC controller 17 can automatically control the operation of the production line, effectively improving the automation and integration of the device.

[0047] There are five sets of raw material conveying devices 3. The five sets of raw material conveying devices 3 are arranged in a straight array from left to right on one side of the steel structure support frame 1. The raw material conveying device 3 includes a base plate 31, a drive mechanism 32 set on the base plate 31 and a feeding rack 33. The material roll 2 is installed on the feeding rack 33. The material roll 2 from left to right are the bottom paper roll 201, the first corrugated paper roll 202, the middle face paper roll 203, the second corrugated paper roll 204 and the top paper roll 205.

[0048] The preheating zone 4 is equipped with partition plates 16 arranged in a linear array. The partition plates 16 divide the preheating zone 4 into a first preheating chamber 41, a second preheating chamber 42, a third preheating chamber 43, a fourth preheating chamber 44, and a fifth preheating chamber 45 from left to right. The first preheating chamber 41, the second preheating chamber 42, the third preheating chamber 43, the fourth preheating chamber 44, and the fifth preheating chamber 45 are provided with vertically connected conveying channels 19, which allow the paper roll 2 to pass through and enter the preheating zone 4.

[0049] In this embodiment, the raw material conveying device 3 can respectively convey the bottom paper roll 201, the first corrugated paper roll 202, the middle face paper roll 203, the second corrugated paper roll 204, and the top paper roll 205 to the first preheating chamber 41, the second preheating chamber 42, the third preheating chamber 43, the fourth preheating chamber 44, and the fifth preheating chamber 45 for preheating. Since the roll characteristics of the bottom paper roll 201, the first corrugated paper roll 202, the middle face paper roll 203, the second corrugated paper roll 204, and the top paper roll 205 are different... Therefore, the required preheating temperatures also differ. The first preheating chamber 41, the second preheating chamber 42, the third preheating chamber 43, the fourth preheating chamber 44, and the fifth preheating chamber 45 are heated by heating pipes or other heating methods, and the heating temperature is controlled by the PLC controller 17, effectively improving the convenience of heating and thus enhancing the practicality of the device. Initially, there are five conveying routes, respectively conveying the bottom paper roll 201, the middle paper roll 203, the first corrugated paper roll 202, the second corrugated paper roll 204, and the top paper roll 205. Figure 3 As shown, the conveying route of the paper roll 201 is as follows: For ease of description, the five sets of raw material conveying devices are described from left to right as raw material conveying devices 1, 2, 3, 4, and 5 respectively. Raw material conveying device 1 conveys the paper roll 201. The paper roll 201 first enters the first preheating chamber 41 for preheating. After being preheated in the first preheating chamber 41, the paper roll 201 passes through the side wall opening of the first preheating chamber 41 and is conveyed by the guide components set on the steel structure support frame 1 and the steel structure support frame 2 to one of the conveying components 2 14 set on the overpass 10. Finally, the paper roll 201 is conveyed to the composite device 11. It should be noted that the working principle and structure of the guide components are the same as the working principle and structure of the conveying component 3 18.

[0050] The No. 2 raw material conveying device 3 conveys the first corrugated paper roll 202. The first corrugated paper roll 202 enters the second preheating chamber 42 for preheating through the conveying channel 19 that runs vertically through the conveying component 3 18 and the preheating zone 4. After being preheated in the second preheating chamber 42, the first corrugated paper roll 202 passes through the conveying channel 19 above the second preheating chamber 42, and passes through the conveying component 3 18 arranged on the preheating zone 4 and the multiple conveying components 1 9 arranged on the steel structure support frame 2 5, and is then conveyed to the single-face corrugating machine 1 6 for corrugation pressing.

[0051] The No. 3 raw material conveying device 3 conveys the middle face paper roll 203 paper in the same way as the No. 2 raw material conveying device 3, so it will not be described in detail. The middle face paper roll 203 paper is finally conveyed to the single-sided corrugating machine 6 and hot-pressed with the pressed corrugated paper to form the corrugated paper core support layer 1. The middle face paper roll 203 paper is located on top of the corrugated paper.

[0052] The No. 4 raw material conveying device 3 conveys the second corrugated paper roll 204. The second corrugated paper roll 204 enters the fourth preheating chamber 44 through the vertically penetrating conveying channel 19 opened by the conveying component 3 18 and the preheating zone 4 for preheating. After being preheated in the fourth preheating chamber 44, the second corrugated paper roll 204 passes through the conveying channel 19 opened above the fourth preheating chamber 44, and passes through the conveying component 3 18 arranged on the preheating zone 4 and the multiple conveying components 1 9 arranged on the steel structure support frame 2 5, and is conveyed to the single-face corrugating machine 2 7 for corrugation pressing.

[0053] The No. 5 raw material conveying device 3 conveys the top paper roll 205 paper. The conveying method is the same as the steps of the No. 4 raw material conveying device 3, so it will not be described in detail. The top paper roll 205 paper is finally conveyed to the single-sided corrugating machine 7 and is hot-pressed with the pressed corrugated paper to form the corrugated paper core support layer 2. The top paper roll 205 paper is located on top of the corrugated paper.

[0054] It should be noted that the upper conveying rollers 186 of conveying component 1 9, conveying component 2 14, and conveying component 3 18 are all driven by external servo motors to achieve the purpose of conveying paper. The drive mechanism 32 of the raw material conveying device 3 is a servo motor or other drive components. By setting multiple independent drive mechanisms 32, the rotation of the bottom paper roll 201, the first corrugated paper roll 202, the middle face paper roll 203, the second corrugated paper roll 204, and the top paper roll 205 can be realized to achieve the purpose of conveying five types of paper at the same time, which effectively improves the practicality and conveying convenience of the device.

[0055] Conveying assembly 3 18 is installed on the steel structure support frame 1, inside the preheating zone 4, and above the preheating zone 4. Conveying assembly 3 18 includes a column 181, a cylinder 182 bolted to the column 181, a U-shaped support 183 located at the output end of the cylinder 182, a rotating shaft 184 overlapping the inner wall of the U-shaped support 183, a rotating shaft 2 185 rotatably connected to the column 181, and an upper conveying roller 186 and a lower conveying roller 187 respectively arranged in the upper and lower directions on the outer walls of the rotating shaft 2 185 and the rotating shaft 184.

[0056] The working principle and structure of conveying component 19 and conveying component 214 are consistent with those of conveying component 318.

[0057] In this embodiment, the distance between the upper conveyor roller 186 and the lower conveyor roller 187 can be adjusted according to actual usage requirements. When it is necessary to adjust the distance between the upper conveyor roller 186 and the lower conveyor roller 187, the cylinder 182 is activated to drive the U-shaped support 183 to move up and down. While the U-shaped support 183 moves up and down, it drives the rotating shaft 185 to move up and down on the inner wall of the slot hole opened on the column 181. Holes corresponding to the slot hole positions are also opened on the preheating zone 4, which facilitates the adjustment of the distance between the upper conveyor roller 186 and the lower conveyor roller 187 and effectively improves the convenience of adjustment.

[0058] The slitting device 8 includes a support truss guide rail 81, a cutter adjustment assembly 82 and a cutter adjustment assembly 83 symmetrically mounted on the support truss guide rail 81.

[0059] The cutter adjustment assembly 82 includes a vertical lifting component slidably connected to the support truss guide rail 81 and a cutter located at the output end of the vertical lifting component. The cutter can be rotated by a servo motor and conveyed to the corrugated paper core support layer 2, which is hot-pressed by the single-sided corrugating machine 7, in the direction of the slitting device 8. A conveying guide rail is provided below the slitting device 8. The conveying guide rail is existing technology and is equipped with a guiding unit and a clamping unit on its upper part. It is a common piece of equipment on the production line and will not be described in detail here. The support truss guide rail 81 can adjust the distance between the cutter adjustment assembly 82 and the cutter adjustment assembly 83 by the cooperation of the servo motor and the double-threaded screw, thereby cutting the corrugated paper core support layer 2 on the conveying guide rail into a certain width.

[0060] The working principle and structure of the slitting device 212 are consistent with those of the slitting device 18.

[0061] In this embodiment, the first slitting device 8 cuts the second corrugated paper core support layer into a certain width, while the second slitting device 12 mainly cuts the length of the cardboard that has been hot-pressed into an integral structure by the composite device 11. That is, the second slitting device 12 determines the size of the final corrugated carton.

[0062] It also includes a temperature control system.

[0063] In this embodiment, a temperature control system can heat the equipment that needs to be heated on the production line to meet the production requirements of corrugated cardboard boxes.

[0064] A production method, specifically including the following steps:

[0065] S1. Using the raw material conveying device 3, the bottom paper roll 201, the first corrugated paper roll 202, the middle face paper roll 203, the second corrugated paper roll 204 and the top paper roll 205 are respectively conveyed to the first preheating chamber 41, the second preheating chamber 42, the third preheating chamber 43, the fourth preheating chamber 44 and the fifth preheating chamber 45 for preheating;

[0066] S2. The preheated first corrugated paper roll 202 and the middle face paper roll 203 are both fed to a single-face corrugator 6 for corrugating, gluing and pressing, so that the first corrugated paper roll 202 and the middle face paper roll 203 are integrally formed, that is, the first corrugated paper core support layer. At the same time, the preheated second corrugated paper roll 204 and the top face paper roll 205 are both fed to a single-face corrugator 7 for corrugating, gluing and pressing, so that the second corrugated paper roll 204 and the top face paper roll 205 are integrally formed, that is, the second corrugated paper core support layer.

[0067] S3. The corrugated paper core support layer 2, which is formed as one piece after being processed by the single-sided corrugating machine 2 7, is output from the output end of the single-sided corrugating machine 2 7 and is conveyed to the slitting device 1 8 via the conveying assembly 1 9. The slitting device 1 8 cuts the two sides of the corrugated paper core support layer 2 formed as one piece to form a corrugated paper core support layer 2 of a certain width.

[0068] S4. The paper roll 201, corrugated paper core support layer one, and corrugated paper core support layer two are all conveyed to the composite device 11 for gluing and hot pressing to finally form a paperboard structure.

[0069] S5. After being coated with glue and hot-pressed, the cardboard structure is conveyed to the slitting device 12 via the second conveying assembly 14. The slitting device 12 cuts the cardboard structure in length.

[0070] S6. The cardboard structure after being cut by the slitting device 2 12 is conveyed to the creasing device 13 by the conveying assembly 2 14, and the creasing device 13 creasing the cardboard structure.

[0071] S7. Finally, the cardboard structure is folded by an external folding device to form a corrugated carton.

[0072] After the above steps, the final corrugated cardboard structure is a 3-5-3 structure, that is, the two sides have a 3-layer corrugated paper structure (from bottom to top, bottom linerboard roll 201, first corrugated paper roll 202, and middle linerboard roll 203), and the middle has a 5-layer corrugated paper structure (from bottom to top, bottom linerboard roll 201, first corrugated paper roll 202, middle linerboard roll 203, second corrugated paper roll 204, and top linerboard roll 205). Finally, the corrugated cardboard is crimped by the crimping device 13 and folded by the external device to form the corrugations. The corrugated cardboard box features a reinforced 5-layer corrugated cardboard structure at the bottom, sides, and two top closures. Compared to existing technologies, this effectively enhances the support strength of the corrugated cardboard box's load-bearing surfaces. Compared to existing methods that require rivets or glue to reinforce the corrugated cardboard box, this production line produces corrugated cardboard boxes using less material, saving on operating costs. Furthermore, the thermoforming structure ensures a stronger connection between the corrugated cardboard pieces, improving connection strength and thus effectively enhancing the practicality and convenience of the production line.

[0073] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An automated production line for corrugated cardboard boxes, characterized in that, Includes steel structure support frame and material rolls: A raw material conveying device is arranged in a linear array on one side of the steel structure support frame; A preheating zone is located on the upper part of the steel structure support frame one; A second steel structure support frame is provided on one side of the first steel structure support frame. The second steel structure support frame is provided with a first single-sided corrugating machine, a second single-sided corrugating machine, a slitting device 1 located at the output end of the second single-sided corrugating machine, and a conveying assembly 1. An overpass is installed on one side of the steel structure support frame II along the output direction. The overpass is equipped with a composite device, a cutting device II, an indentation device, and a conveying assembly II. It also includes a PLC controller and a display touch screen, which are used to monitor the overall operation of the device and observe production information.

2. The automated production line for corrugated cardboard boxes according to claim 1, characterized in that, The number of raw material conveying devices is five sets. The five sets of raw material conveying devices are arranged in a straight array from left to right on one side of the steel structure support frame. The raw material conveying device includes a base plate, a drive mechanism and a feeding rack set on the base plate. The material roll is installed on the feeding rack. The material rolls from left to right are the bottom paper roll, the first corrugated paper roll, the middle face paper roll, the second corrugated paper roll and the top paper roll.

3. The automated production line for corrugated cardboard boxes according to claim 2, characterized in that, The preheating zone is equipped with partitions arranged in a linear array, which divide the preheating zone into a first preheating chamber, a second preheating chamber, a third preheating chamber, a fourth preheating chamber, and a fifth preheating chamber from left to right. The first, second, third, fourth, and fifth preheating chambers are provided with vertically penetrating conveying channels that allow the paper roll to pass through and enter the preheating zone.

4. The automated production line for corrugated cardboard boxes according to claim 1, characterized in that, Conveying assembly three is provided on the steel structure support frame one, inside the preheating zone, and above the preheating zone. Conveying assembly three includes a column, a cylinder bolted to the column, a U-shaped support located at the output end of the cylinder, a rotating shaft one overlapping the inner wall of the U-shaped support, a rotating shaft two rotatably connected to the column, and an upper conveying roller and a lower conveying roller respectively arranged in the upper and lower directions on the outer walls of the rotating shaft two and the rotating shaft one.

5. The automated production line for corrugated cardboard boxes according to claim 1, characterized in that, The working principle and structure of the first and second conveying components are consistent with those of the third conveying component.

6. The automated production line for corrugated cardboard boxes according to claim 1, characterized in that, The slitting device includes a support truss guide rail, a cutter adjustment assembly 1 and a cutter adjustment assembly 2 symmetrically installed on the support truss guide rail.

7. The automated production line for corrugated cardboard boxes according to claim 1, characterized in that, The working principle and structure of the second slitting device are consistent with those of the first slitting device.

8. The automated production line for corrugated cardboard boxes according to claim 1, characterized in that, It also includes a temperature control system.

9. A production method, employing an automated corrugated cardboard box production line according to any one of claims 1-7, comprising the following steps: S1. The bottom paper roll, the first corrugated paper roll, the middle face paper roll, the second corrugated paper roll, and the top paper roll are respectively conveyed to the first preheating chamber, the second preheating chamber, the third preheating chamber, the fourth preheating chamber, and the fifth preheating chamber for preheating using the raw material conveying device. S2. The preheated first corrugated paper roll and the middle face paper roll are both fed to the first single-face corrugator for corrugating, gluing and pressing, so that the first corrugated paper roll and the middle face paper roll are formed as one piece, that is, the first corrugated paper core support layer. At the same time, the preheated second corrugated paper roll and the top face paper roll are both fed to the second single-face corrugator for corrugating, gluing and pressing, so that the second corrugated paper roll and the top face paper roll are formed as one piece, that is, the second corrugated paper core support layer. S3. The corrugated paper core support layer 2, which is formed as one piece after being processed by the single-sided corrugating machine 2, is output from the output end of the single-sided corrugating machine 2 and is conveyed to the slitting device 1 via the conveying assembly 1. The slitting device 1 cuts the two sides of the corrugated paper core support layer 2 formed as one piece to form a corrugated paper core support layer 2 of a certain width. S4. The bottom paper roll, corrugated paper core support layer one, and corrugated paper core support layer two are all fed to the composite device for gluing and hot pressing to finally form a paperboard structure. S5. After being coated with glue and hot-pressed, the cardboard structure is conveyed to the slitting device 2 via the conveying assembly 2. The slitting device 2 cuts the cardboard structure in length. S6. The cardboard structure after being cut by the slitting device 2 is conveyed to the creasing device by the conveying assembly 2, and the creasing device creasing the cardboard structure. S7. Finally, the cardboard structure is folded by an external folding device to form a corrugated carton.

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