Corrugated board pressure roller molding production line

Abstract

This invention relates to the field of corrugated board processing technology, and more particularly to a corrugated board pressure roller forming production line. It includes a frame on which a primary pressure roller group, a secondary pressure roller group, and a tertiary pressure roller group are sequentially arranged. Each pressure roller group includes an upper pressure roller and a lower pressure roller. The two pressure rollers of the primary pressure roller group each have three sets of sequentially connected primary convex rings spaced apart. The primary convex rings of the upper pressure roller are concave at their joints, while the primary convex rings of the lower pressure roller are convex at their joints. The secondary pressure roller group has a set of secondary convex rings on both sides of the three sets of primary convex rings. The tertiary pressure roller group has a set of tertiary convex rings on the opposite sides of the two sets of secondary convex rings. The entire processing involves three sequential pressing and sorting processes without interference, achieving continuous production. Furthermore, batch forming significantly avoids the problem of increased defect rates in corrugated boards due to material shrinkage and deformation compared to single-stage forming, thus improving production efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of corrugated board processing technology, and in particular to a corrugated board pressure roller forming production line. Background Technology

[0002] Corrugated sheets, as a type of board material with good structural strength and lightweight properties, are widely used in various fields such as building decoration, transportation, and packaging protection. Their typical structure usually includes a flat base layer and an integrally formed corrugated protrusion structure on the flat base layer. This corrugated protrusion structure can significantly improve the bending and flexural strength of the sheet material, while effectively reducing the overall weight of the sheet material, achieving efficient material utilization.

[0003] In actual production and use, the processing of corrugated sheets typically involves core processes such as raw material feeding, forming, and length cutting. Among these, the forming process is the key to determining the quality of the corrugated sheet product. Traditional corrugated sheet forming equipment often uses an integrated pressure roller structure, meaning that the entire corrugated sheet is formed in one go using a set of pressure rollers. However, during the forming process, corrugated sheets undergo localized deformation and shrinkage, specifically at the protruding parts. These parts shrink into the mold grooves during forming, causing localized tension on the sheet when other protruding parts are formed simultaneously. In other words, the one-time forming method using integrated pressure rollers is difficult to adapt to the deformation characteristics of the material, easily leading to problems such as irregular corrugations and localized wrinkles in the formed corrugated sheet. Furthermore, the stress concentration during one-time forming, especially for thinner corrugated sheets, can cause tearing, significantly reducing the product yield.

[0004] In response to the problems existing in the forming and cutting processes of the above-mentioned corrugated board production, there is an urgent need for a corrugated board production equipment that can adapt to the deformation characteristics of materials such as thin plates and improve the forming quality. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art and to propose a corrugated board pressure roller molding production line.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A corrugated board pressure roller forming production line includes a frame, on which a primary pressure roller group for center pressing, a secondary pressure roller group for pressing between the center and the two side edges, and a tertiary pressure roller group for pressing the two side edges are arranged sequentially. Each pressure roller group includes an upper pressure roller and a lower pressure roller.

[0008] Each of the two pressure rollers in the first-stage pressure roller group has three sets of first-stage convex rings connected in sequence at intervals. The three sets of first-stage convex rings on the upper pressure roller are concave at the joint, while the three sets of first-stage convex rings on the lower pressure roller are convex at the joint.

[0009] Based on the first-stage pressure roller group, the two pressure rollers of the second-stage pressure roller group are provided with a set of second-stage convex rings on both sides of the three sets of first-stage convex rings. The diameter of the second-stage convex ring on the upper pressure roller is smaller than the diameter of the first-stage convex ring, and the diameter of the second-stage convex ring on the lower pressure roller is larger than the diameter of the first-stage convex ring.

[0010] The two pressure rollers of the three-stage pressure roller group are based on the two-stage pressure roller group. Each of the two sets of two sets of two-stage convex rings has a set of three-stage convex rings on the opposite side of the two sets of two-stage convex rings. The diameter of the three-stage convex ring on the upper pressure roller is larger than the diameter of the two-stage convex ring, and the diameter of the three-stage convex ring on the lower pressure roller is smaller than the diameter of the two-stage convex ring.

[0011] Preferably, the first-stage pressure roller group, the second-stage pressure roller group, and the third-stage pressure roller group are each provided with multiple groups;

[0012] The concave and convex amplitudes at the joint of the primary convex rings of multiple primary pressure roller groups increase sequentially.

[0013] The diameter of the secondary convex rings in multiple sets of secondary pressure rollers changes step by step;

[0014] The diameter of the three-stage convex rings in multiple sets of three-stage pressure rollers changes step by step.

[0015] Preferably, the primary pressure roller group has four groups, and the side angles of its concave and convex parts change to 10°, 30°, 50° and 80°; the dimensions of the secondary and tertiary convex rings on the multiple secondary and tertiary pressure roller groups change sequentially by an equal number.

[0016] Preferably, the maximum size difference between the secondary convex ring and the primary convex ring, and the maximum size difference between the tertiary convex ring and the secondary convex ring, are all equal to the maximum upward convex amplitude at the joint of the primary convex ring.

[0017] Preferably, starting from the second group, the intermediate primary convex ring of the multiple groups of secondary pressure rollers is removed.

[0018] Preferably, three sets of auxiliary pressure rollers are also provided, and the three sets of auxiliary pressure rollers are exactly the same as the last set of the first-level pressure roller set, the second-level pressure roller set, and the third-level pressure roller set, and are arranged adjacent to each other.

[0019] Preferably, the rear end of the frame is provided with a cutting assembly, which includes an arch frame. Two sets of blade holders are vertically slidably mounted on the arch frame. Both sets of blade holders have blades on their opposite faces. The two sets of blade holders are driven by a drive structure to move synchronously relative to each other or in opposite directions.

[0020] Preferably, the drive structure includes a dual-output shaft drive motor fixed on the arch frame. Each output shaft of the dual-output shaft drive motor is equipped with a crank, and a rocker arm is rotatably mounted at the end of each crank. The end of the rocker arm is rotatably connected to the upper tool holder. A pulley is provided on the arch frame above the upper tool holder. A steel strand is provided on the upper tool holder, and the other end of the steel strand passes around the pulley and is connected to the lower tool holder.

[0021] Preferably, the two sets of cranks have different lengths, and the upper tool holder has a groove on the side of the longer crank, in which the crank and tool holder connector slide within the groove.

[0022] Preferably, the front end of the frame is provided with two sets of adjustable-spaced guide positioning plates for guiding the input of flat sheet metal.

[0023] Compared with the prior art, the present invention provides a corrugated board pressure roller forming production line, which has the following beneficial effects:

[0024] 1. This invention is equipped with a primary pressure roller group, a secondary pressure roller group, and a tertiary pressure roller group, which sequentially perform three pressing and classification processes without interference. This not only achieves the goal of continuous production, but also allows for batch molding. Compared with one-time molding, this greatly avoids the problem of increased defect rate of corrugated boards due to material shrinkage and deformation, thereby improving production efficiency and quality.

[0025] 2. In this invention, there are multiple first-stage pressure roller groups, second-stage pressure roller groups, and third-stage pressure roller groups. This process is carried out step by step, thereby dispersing the deformation amplitude of a single pressing, from shallow to deep. The amplitude of each subsequent group gradually increases, so that the corrugation depth in the central area of ​​the board gradually increases, avoiding the tearing of the material caused by a large-amplitude pressing at one time.

[0026] 3. This invention also includes three sets of auxiliary pressure rollers, which are identical to and adjacent to the last set of the primary, secondary, and tertiary pressure roller sets, respectively. These rollers perform a secondary pressing process on the corrugated surface after the three-stage molding process, ensuring the stability and regularity of the entire corrugated structure.

[0027] 4. In this invention, the tool holder can move synchronously relative to or opposite to each other. Even if the corrugated board settles due to gravity, the tool holder can adapt to the position of the corrugated board by moving, eliminating the need for manual adjustment of the tool spacing and greatly simplifying the operation process.

[0028] 5. The scissor-type cutting method of this invention can disperse the cutting force and reduce the impact force of a single cut. It is not only more labor-saving, but also avoids collisions when the upper and lower blades are in synchronous contact, effectively protecting the blade contact surface and extending the service life of the blade.

[0029] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0030] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 .

[0031] Figure 2 Schematic diagram of the three-dimensional structure of the present invention Figure 2 .

[0032] Figure 3 Schematic plan view of the side of the present invention

[0033] Figure 4 Schematic plan view of the top of the present invention

[0034] Figure 5 For all the first-stage roller groups, second-stage roller groups, and third-stage roller groups in the present invention Figure 4 Schematic plan view from above

[0035] Figure 6 Schematic diagram of the first set of first-stage roller groups of the present invention

[0036] Figure 7 Schematic diagram of the second set of first-stage roller groups of the present invention

[0037] Figure 8 Schematic diagram of the third set of first-stage roller groups of the present invention

[0038] Figure 9 Schematic diagram of the fourth set of first-stage roller groups of the present invention

[0039] Figure 10 Schematic diagram of the auxiliary roller group supporting the first-stage roller group of the present invention

[0040] Figure 11 Schematic diagram of the first set of second-stage roller groups of the present invention

[0041] Figure 12 Schematic diagram of the second set of second-stage roller groups of the present invention

[0042] Figure 13 Schematic diagram of the third set of second-stage roller groups of the present invention

[0043] Figure 14 Schematic diagram of the auxiliary roller group supporting the second-stage roller group of the present invention

[0044] Figure 15 Schematic diagram of the first set of third-stage roller groups of the present invention

[0045] Figure 16 Schematic diagram of the second set of third-stage roller groups of the present invention

[0046] Figure 17 Schematic diagram of the third set of third-stage rollers of the present invention

[0047] Figure 18 Schematic three-dimensional diagram of the introduction positioning plate and drive structure of the present invention

[0048] Figure 19This is a front view schematic diagram of the cutting component of the present invention.

[0049] Figure 20 This is a front view of the cutting assembly of the present invention after the arch frame has been removed.

[0050] Figure 21 This is a schematic diagram of the rotating installation structure of the upper and lower pressure rollers on the bracket of the present invention.

[0051] Figure 22 This is a schematic diagram of the two sets of tool holder cutting drive structure of the present invention.

[0052] In the diagram: 1. Frame; 2. Primary pressure roller group; 3. Secondary pressure roller group; 4. Tertiary pressure roller group; 5. Primary convex ring; 501. Upper convex; 502. Inner concave; 6. Secondary convex ring; 7. Tertiary convex ring; 8. Smooth shaft roller; 9. Auxiliary pressure roller group; 10. Inlet positioning plate; 11. Arch frame; 12. Dual output shaft drive motor; 13. Crank; 14. Rocker arm; 15. Tool holder; 16. Tool; 17. Pulley; 18. Steel strand. Detailed Implementation

[0053] The following will refer to the appendices in the embodiments of the present invention. Figure 1-22 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0054] Example 1: There are various forms of corrugated board production. For example, a hydraulic press can press the boards together using upper and lower molds. This method integrates the equipment for the molding process, but it can only press one board at a time, resulting in low efficiency. Another method is roller pressing, but roller pressing cannot adapt to the deformation and shrinkage characteristics of thin boards. This will affect the processing quality of the corrugated board and ultimately affect the assembly quality of the final product - the tool room.

[0055] Therefore, even in order to achieve the continuity of the forming process, and to avoid the problem that one-time roller forming cannot adapt to the deformation and shrinkage characteristics of thinner materials such as corrugated boards, this embodiment provides a corrugated board roller forming production line, including a frame 1.

[0056] The frame 1 is an integral structure made of I-beams or square steel welded together, serving as the installation foundation for the entire molding production line and providing stable installation support for each pressure roller assembly and its supporting drive assembly.

[0057] The frame 1 is sequentially equipped with a primary pressure roller group 2 for center pressing, a tertiary pressure roller group 4 for pressing on both sides, and a secondary pressure roller group 3 for pressing between the center and both sides. Each pressure roller group includes an upper pressure roller and a lower pressure roller.

[0058] The primary pressure roller group 2 is located at the front end of the frame 1 and is used to press the center of the sheet material (the centerline or two symmetrical protrusions adjacent to the centerline). The primary pressure roller group 2 includes an upper pressure roller and a lower pressure roller. Both the upper and lower pressure rollers are provided with three sets of primary convex rings 5 ​​connected in sequence at intervals. The three sets of primary convex rings 5 ​​are distributed from the center of the pressure roller to both ends. The three sets of primary convex rings 5 ​​on the upper pressure roller are concave at the joint 502, while the three sets of primary convex rings 5 ​​on the lower pressure roller are convex at the joint 501. The convex rings of the upper and lower pressure rollers cooperate to press a corrugated structure in the center area of ​​the sheet material, which is called center-position shaping.

[0059] The secondary pressure roller group 3 is located behind the primary pressure roller group 2 and is used to press the area between the center and the two sides of the aluminum plate. Based on the structure of the primary pressure roller group 2, a secondary convex ring 6 is added to each side of the three primary convex rings 5. The diameter of the secondary convex ring 6 on the upper pressure roller is smaller than the diameter of the primary convex ring 5, while the diameter of the secondary convex ring 6 on the lower pressure roller is larger than the diameter of the primary convex ring 5. This structural design allows the plate to be pressed gradually towards both sides after the center is pressed. Since the center of the plate has already been pressed, and the formed area is held in place by the upper convex 501 and the inner concave 502 structure, when the sides are pressed, the empty plate on both sides will shrink inwards, while the already formed plate is unaffected or minimally affected. This adapts to the material's deformation and shrinkage characteristics.

[0060] The third-stage pressure roller group 4 is positioned behind the second-stage pressure roller group 3 and is used to press the two sides of the sheet material. Based on the structure of the second-stage pressure roller group 3, a third-stage convex ring 7 is added to each of the two sets of second-stage convex rings 6 on opposite sides. The diameter of the third-stage convex ring 7 on the upper pressure roller is larger than the diameter of the second-stage convex ring 6, while the diameter of the third-stage convex ring 7 on the lower pressure roller is smaller than the diameter of the second-stage convex ring 6, completing the full pressing of the sheet material from the center to both sides, forming the final corrugated structure. This process presses only the two sides of the sheet material, and the suspended parts are less likely to be affected by the already formed areas, also adapting to the shrinkage characteristics of material deformation.

[0061] Based on the above technical solution:

[0062] The raw sheet material is conveyed to the first-stage pressure roller group 2 via the conveying structure at the front end of the frame 1 (in reality, the conveying structure is a roller conveyor curtain, which consists of several upper and lower cooperating optical shafts rotating relative to each other to convey the sheet material, and also flattening the sheet material during the conveying process). The sheet material enters between the upper and lower pressure rollers of the first-stage pressure roller group 2. The first-stage pressure roller group 2 is started, and the concave part 502 of the upper pressure roller cooperates with the convex part 501 of the lower pressure roller to press the central area of ​​the sheet material, forming two sets of corrugated convexities. The sheet material with the center pressed continues to be conveyed to the second-stage pressure roller group 3. The second-stage convex ring 6 of the second-stage pressure roller group 3 cooperates with the first-stage convex ring 5 to press the area between the center and the two sides of the sheet material, causing the corrugated structure to extend to both sides, forming two more sets of corrugated convexities. Subsequently, the sheet material enters the three-stage pressure roller group 4. The third-stage convex ring 7 of the three-stage pressure roller group 4 cooperates with the second-stage convex ring 6 to press the two sides of the sheet material. The two sides are raised, and finally a complete and regular corrugated structure is formed on the sheet material, completing the pressing process.

[0063] The entire processing involves three sequential pressing operations that do not interfere with each other. This not only achieves continuous production but also allows for batch molding, which, compared to one-time molding, greatly avoids the problem of increased defect rates in corrugated boards caused by material shrinkage and deformation, thus improving production efficiency and quality.

[0064] Example 2: In reality, the depth of each protrusion on a corrugated sheet is relatively large, and the grooves in a tool shed corrugated sheet can reach 30mm. This size, during the forming process, can easily cause deformation or even tearing at the bending points.

[0065] Therefore, in this embodiment, the first-stage pressure roller group 2, the second-stage pressure roller group 3, and the third-stage pressure roller group 4 are all provided with multiple groups;

[0066] The concave 502 and convex 501 at the joint of the first-level convex ring 5 of the multiple first-level pressure roller group 2 increase in amplitude sequentially. The initial pressure roller group has a smaller amplitude, which performs preliminary low-stress pressing on the board. The amplitude of each subsequent group gradually increases, so that the corrugation depth in the central area of ​​the board gradually increases, avoiding material tearing caused by a large-amplitude pressing at one time.

[0067] The initial group of multiple secondary pressure rollers in group 3 has a smaller amplitude, which performs preliminary low-stress pressing on the board. The amplitude of each subsequent group gradually increases, so that the corrugation depth in the center area of ​​the board gradually increases, avoiding material tearing caused by a large-amplitude pressing at one time.

[0068] The diameter of the three-stage convex ring 7 in the multiple sets of three-stage pressure rollers 4 changes step by step. Similarly, by adjusting the diameter of the three-stage convex ring 7 step by step, the corrugation size on both sides of the sheet material gradually reaches the design requirements, reducing the material stress during the forming process.

[0069] Based on the above technical solution:

[0070] The sheet material first enters the first group of primary pressure rollers 2. At the joint of the convex rings in this group, the concave 502 and convex 501 angles are minimal, initially pressing the central area of ​​the sheet material to form shallow ripples. Subsequently, the sheet material enters each subsequent group of primary pressure rollers 2, with each group's angle increasing compared to the previous one, gradually deepening the ripple depth in the central area until the designed depth is reached. After the central area has been progressively pressed, the sheet material enters the first group of secondary pressure rollers 3. The diameter of the secondary convex ring 6 in this group is close to that of the primary convex ring 5, initially pressing the transition area. Then, it enters each subsequent group of secondary pressure rollers 3, with the diameter of the secondary convex ring 6 gradually adjusted, progressively shaping the ripple size in the transition area. Finally, the sheet material enters multiple groups of tertiary pressure rollers 4, with the diameter of the tertiary convex ring 7 adjusted step by step, gradually achieving the target ripple size on both sides, completing the overall progressive pressing process.

[0071] This step-by-step process disperses the deformation amplitude of a single press, gradually increasing the amplitude in subsequent groups, thus deepening the corrugation depth in the central area of ​​the sheet material and preventing the material from tearing due to a large-amplitude pressing at once.

[0072] In this embodiment, the first-stage pressure roller group 2 has four groups, the second-stage pressure roller group 3 has three groups, and the third-stage pressure roller group 4 has three groups.

[0073] The side angles of the four sets of primary pressure rollers 2 at the concave 502 and convex 501 vary to 10°, 30°, 50°, and 80°. The first set of pressure rollers at a 10° angle performs a very shallow pressing on the sheet material, allowing the material to initially adapt to the pressing state; the second set at a 30° angle further deepens the corrugations; the third set at a 50° angle continues to adjust; and the fourth set at an 80° angle completes the pressing of the target corrugation angle in the central area. The angles increase step by step to ensure uniform material deformation.

[0074] The dimensions of the secondary convex ring 6 and the tertiary convex ring 7 on the secondary pressure roller group 3 and the tertiary pressure roller group 4 change sequentially by an equal number. Taking a groove depth of 30mm as an example, the size difference between the secondary convex ring 6 and the primary convex ring 5 is 10mm, 20mm, and 30mm respectively. That is to say, the pressing depth of each group of secondary pressure rollers 3 is 10mm, so that the corrugation size in the transition area is uniformly transitioned.

[0075] Similarly, the number of groups is determined based on the target size difference, and the size difference of each group is increased equally to ensure that the corrugation size on both sides is formed uniformly.

[0076] Of course, the number of primary pressure roller group 2, secondary pressure roller group 3, and tertiary pressure roller group 4 can be appropriately increased or decreased as the depth of the corrugated board groove changes.

[0077] In Example 3, to ensure a smooth and continuous transition of corrugations in each area of ​​the corrugated sheet, and to avoid steps or unevenness on the surface of the corrugated sheet due to mismatch between the size difference of the convex rings in different areas and the amplitude of the convex 501 of the central convex ring, the maximum size difference between the secondary convex ring 6 and the primary convex ring 5, and the maximum size difference between the tertiary convex ring 7 and the secondary convex ring 6 are all equal to the maximum amplitude of the convex 501 at the joint of the primary convex ring 5. That is, the size difference of the convex 501 and concave 502 of the last group of primary pressure rollers 2, the size difference between the secondary convex ring 6 and the primary convex ring 5 of the last group of secondary pressure rollers 3, and the size difference between the tertiary convex ring 7 and the secondary convex ring 6 of the last group of tertiary pressure rollers 4 are the same. The corrugations in the transition area and the two side areas are also smoothly connected, ultimately forming a continuous and flat corrugated structure, improving the product's appearance and structural integrity.

[0078] In Example 4, starting from the second group, the intermediate primary convex ring 5 of the multiple sets of secondary pressure rollers 3 is removed. The first group of secondary pressure rollers 3 retains the intermediate primary convex ring 5 for the initial pressing transition area based on the central corrugations; from the second group onwards, since the central corrugations of the board have already been formed, removing the intermediate primary convex ring 5 can avoid secondary compression or scratching of the already formed central corrugations by the primary convex ring 5, and at the same time reduce the number of convex rings 501 on the pressure rollers, simplifying the structure.

[0079] Example 5 also includes three sets of auxiliary pressure roller groups 9. These three sets of auxiliary pressure roller groups 9 are identical to and adjacent to the last set of the first-level pressure roller group 2, the second-level pressure roller group 3, and the third-level pressure roller group 4, respectively (the auxiliary pressure roller group 9 of the third-level pressure roller group 4 is not shown in the attached figures). The structural parameters of the auxiliary pressure roller groups 9 are consistent with the last set of the corresponding pressure roller groups. After the sheet material completes the pressing of the central area by multiple sets of first-level pressure roller groups 2, it enters the first-level auxiliary pressure roller group 9, which has the same structure as the last set of first-level pressure roller groups 2. The concave part 502 of the upper pressure roller and the convex part 501 of the lower pressure roller of the auxiliary pressure roller group 9 perform a secondary pressing of the central corrugations with the same amplitude as the last set of first-level pressure roller groups 2, eliminating any minor deformations that may occur during the pressing process and ensuring the stability of the central corrugation shape. Subsequently, after the sheet material completes the pressing of the transition area by multiple sets of second-level pressure roller groups 3, it enters the second-level auxiliary pressure roller group 9. The second-level auxiliary pressure roller group 9, with the same convex ring size as the last set of second-level pressure roller groups 3, performs a secondary shaping of the corrugations in the transition area, consolidating the connection between the transition area and the central area. Finally, the board is pressed by multiple sets of three-stage pressure rollers 4 on both sides and then enters the three-stage auxiliary pressure roller group 9. The three-stage auxiliary pressure roller group 9 presses the corrugations on both sides a second time according to the parameters of the last set of three-stage pressure roller group 4, so as to ensure the stability and regularity of the corrugated structure of the entire corrugated board.

[0080] There are 13 sets of pressure rollers on frame 1 from front to back:

[0081] The first set of pressure rollers at the front end consists of two upper and lower optical axis rollers 8. The two sets of optical axis rollers 8 are used to initially clamp the board. One is to receive the board, and the other is to press the board down, so as to avoid the board from lifting up when it is just received at the stress end and when it has just started to be formed.

[0082] The next four groups are the first-stage pressure roller group 2:

[0083] See attached document Figure 6 As shown, the first set of primary pressure rollers 2 includes an upper pressure roller and a lower pressure roller. Both the upper and lower pressure rollers have three sets of primary convex rings 5 ​​spaced apart, distributed outwards from the center of the roller. The three convex rings have the same diameter, and they cooperate to clamp the sheet material. The three primary convex rings 5 ​​on the upper and lower pressure rollers are sequentially joined end-to-end. The joint of the three sets of primary convex rings 5 ​​on the upper pressure roller is concave 502, while the joint of the three sets of primary convex rings 5 ​​on the lower pressure roller is convex 501. The convex 501 cooperates with the concave 502, thus initially pressing down along the center of the sheet material and on both sides, creating an indentation, which is the first step of the pressing process.

[0084] Subsequently, the second group of primary pressure rollers 2 (attached) Figure 7 ), the third group of primary pressure rollers 2 (attached) Figure 8 ), Fourth group of primary pressure rollers 2 (attached) Figure 9 The only difference is in size.

[0085] The secondary pressure roller group 3 is an auxiliary... Figure 10 - Appendix Figure 14 , three The fourth stage of pressure roller group is an auxiliary Figure 15 - Appendix Figure 18 .

[0086] In this scheme, the frame 1 is provided with U-shaped brackets on both sides, which correspond one-to-one with the primary pressure roller group 2, the secondary pressure roller group 3, and the tertiary pressure roller group 4. Each bracket has two sets of bearing seats vertically spaced inside. The upper pressure roller and the lower pressure roller are respectively inserted into the inner rings of the bearings in the two bearing seats at the same side, thus providing a basis for the rotational installation of the upper pressure roller and the lower pressure roller.

[0087] The upper bearing housing can move vertically within the bracket. The bearing housing has an n-shaped connecting seat with a through hole. The upper end of the bracket has a mounting hole corresponding to the through hole. Bolts are inserted through the mounting hole and the through hole. Each bolt has at least four sets of self-locking nuts, which abut against the lower end face of the connecting seat, the upper end face of the connecting seat, the lower end face of the upper side of the bracket, and the upper end face of the upper side of the bracket. This achieves the locking installation of the upper bearing and also allows for the vertical height adjustment of the upper pressure roller, thereby adjusting the distance between the upper and lower pressure rollers.

[0088] In this design, adjacent upper pressure rollers and adjacent lower pressure rollers are connected by chain drives (each set of pressure rollers has two sprockets, and adjacent and corresponding sprockets are connected by a chain), achieving sequential power transmission. All upper pressure rollers rotate in the same direction, and all lower pressure rollers rotate in the same direction, but the upper and lower pressure rollers rotate in opposite directions, thus achieving the conveying of the corrugated sheet. The upper and lower pressure rollers can be independently driven by separate drive motors, or a single drive motor can be used with a gearbox containing two sets of meshing gears. The gear shafts of these two sets of gears are then connected to the upper and lower pressure rollers respectively via couplings, achieving synchronous drive. The drive motor is a geared motor.

[0089] In this design, to prevent misalignment during input that could lead to deviations in the forming position, a bracket is provided at the front end of the frame 1. A double-threaded screw is rotatably mounted on the bracket; that is, two sets of screws with opposite directions of rotation are symmetrically arranged. Each threaded section is threaded with an inlet positioning plate 10. The inlet positioning plate 10 can slide along the vertical length (left-right) of the frame 1 via a guide assembly. By driving the double-threaded screw, the two sets of inlet positioning plates 10 can move relative to or away from each other, thus limiting and clamping the sheet material to achieve stable conveying position. Alternatively, through-hole positioning grooves can be provided on the opposite surfaces of the two inlet positioning plates 10, with both ends of the sheet material embedded in the positioning grooves for conveying, providing even stronger restraint.

[0090] Preferably, to avoid the problem of unstable position affecting cutting accuracy when the formed corrugated sheet is conveyed to the cutting assembly, two sets of adjustable-spaced guide positioning plates (the drive structure is connected to the inlet positioning plate 10) can be provided at the rear end of the frame 1 between the three-stage pressure roller group 4 and the cutting assembly for guiding the corrugated sheet towards the cutting assembly. Of course, at this time, double-sided grooved wheels are rotatably mounted on the opposite surfaces of the two sets of guide positioning plates, and the side of the shaped corrugated sheet is pressed against the double-sided grooved wheels, reducing output friction through the double-sided grooved wheels.

[0091] In this design, the lower pressure rollers can be optimized. For example, the lower pressure roller corresponding to the first-stage pressure roller group 2 has a first-stage collar on both sides of the first-stage convex ring 5, and the diameter of the first-stage collar is the same as that of the first-stage convex ring 5. The lower pressure roller corresponding to the second-stage pressure roller group 3 has a second-stage collar on both sides of the second-stage convex ring 6, and the diameter of the second-stage collar is the same as that of the corresponding second-stage convex ring 6. The lower pressure roller corresponding to the third-stage pressure roller group 4 has a third-stage collar on both sides of the third-stage convex ring 7, and the diameter of the third-stage collar is the same as that of the corresponding third-stage convex ring 7. In this way, the edges of the board always have a contact surface to support them, preventing the edges of the board from sagging.

[0092] In this scheme, the connection method between the third-level convex ring 7 and the second-level convex ring 6 can also be the connection method between the first-level convex ring 5.

[0093] In Example 6, after the corrugated board is shaped, it needs to be cut to a fixed size according to the height of the tool room. Therefore, a cutting assembly is set on the rear side of the frame 1. Traditional cutting structures mostly use hydraulic equipment to drive the upper cutter 16 to descend and the lower cutter 16 to be fixed, cutting the corrugated board by "pressing". However, when the corrugated board is conveyed to the cutting equipment after shaping, the end of the corrugated board is prone to sinking due to its own weight and other factors. At this time, the corrugated board may be pressed against the side of the lower cutter 16, which requires a specialist to adjust and repair it, which is troublesome, affects production efficiency, and has high labor costs.

[0094] To avoid the aforementioned problems, the cutting assembly of this solution includes an arch frame 11 mounted on a frame 1. Vertical guide posts are provided on both sides of the arch frame 11, and guide sleeves are fitted onto each guide post. A blade holder 15 is fixedly connected between the two guide sleeves on the same layer. Blades 16 are detachably mounted on opposite sides of the blade holder 15. Through the cooperation of the guide posts and guide sleeves, the two sets of blades 16 can move vertically, which is the first step in preventing the corrugated sheet ends from settling and contacting each other. The cutting surface of the blade 16 matches the plastic cross-section of the corrugated sheet.

[0095] The two sets of tool holders 15 are driven by a drive structure to move synchronously relative to each other or in opposite directions. The drive structure includes a dual-output shaft drive motor 12 fixed on the arch frame 11. Each output shaft of the dual-output shaft drive motor 12 is equipped with a crank 13. A rocker arm 14 is rotatably mounted at the end of each crank 13. The end of the rocker arm 14 is rotatably connected to the upper tool holder 15. A pulley 17 is provided on the arch frame 11 above the upper tool holder 15. A steel strand 18 is provided on the upper tool holder 15. The other end of the steel strand 18 passes around the pulley 17 and is connected to the lower tool holder 15.

[0096] Based on the above technical solution:

[0097] When the corrugated sheet, after being formed, is conveyed to the cutting assembly via the guide positioning plate (equipped with detection equipment to monitor the conveying interval of the corrugated sheet, i.e., the required cutting size), the drive structure is activated. The dual-shaft drive motor 12 drives two sets of cranks 13 to rotate synchronously. When the cranks 13 rotate to the side closer to the rocker arm 14, they push the rocker arm 14 to swing downwards, causing the upper cutter holder 15 to slide vertically downwards along the arch frame 11. As the upper cutter holder 15 moves downwards, it pulls the lower cutter holder 15 to slide vertically upwards along the arch frame 11 via the steel strand 18. At this time, the upper and lower cutters 16 move closer together to cut the corrugated sheet. When the cranks 13 rotate to the side away from the rocker arm 14, they pull the rocker arm 14 to swing upwards, causing the upper cutter holder 15 to slide upwards. Under the action of gravity, the lower cutter holder 15 slides downwards with the steel strand 18, and the upper and lower cutters 16 move away simultaneously, completing the reset. Throughout the transmission process, the dual-output shaft motor ensures that the cranks 13 on both sides rotate synchronously, and the steel strand 18 and pulley 17 work together to achieve reverse power transmission, ensuring that the two sets of blade holders 15 always move synchronously, thus improving the stability of the cutting process.

[0098] After cutting, the drive structure drives the two sets of tool holders 15 to move synchronously in opposite directions. The upper tool 16 returns to its original position upwards, and the lower tool 16 returns to its original position downwards, preventing the corrugated board from colliding with the tool 16 during subsequent conveying. Since the tool holders 15 can move synchronously relative to or in opposite directions, even if the corrugated board settles due to gravity, the movement of the tool holders 15 can adapt to the position of the corrugated board, eliminating the need for manual adjustment of the tool spacing 16 and greatly simplifying the operation process.

[0099] Example 7 modifies the cutting equipment by installing two sets of cranks 13 with different lengths: one set of long cranks 13 and one set of short cranks 13, which are respectively mounted on the two output shafts of the dual-output shaft drive motor 12. The rotation radius of the long crank 13 is larger than that of the short crank 13, which allows the rocker arm 14 on the corresponding side to swing more, thus driving the corresponding end of the upper tool holder 15 to move a longer distance.

[0100] At this time, the upper tool holder 15 is not directly fixedly connected to the guide sleeves on both sides. Instead, a bushing is rotatably installed on the side of the guide sleeve. The upper tool holder 15 has insert rods on both sides, which are inserted into the corresponding bushings to achieve the deflectable installation of the tool holder 15.

[0101] The lower tool holder 15 has a groove on the side of the longer crank 13, and a pin (connector) is provided in the groove. The pin can slide in the groove. The end of the pin is rotatably connected to the end of the longer crank 13, ensuring that the rocker arm 14 can stably transmit motion when the longer crank 13 rotates, and avoiding jamming. The movement of the pin in the groove can compensate for the motion deviation caused by the difference in length between the longer and shorter cranks 13. This deviation is the displacement trajectory of the upper tool holder 15.

[0102] Based on the above technical solution:

[0103] The dual-output shaft drive motor 12 is started, and the two sets of cranks 13 rotate synchronously. Because the longer crank 13 is longer than the shorter crank 13, during rotation, the rocker arm 14 on the corresponding side of the longer crank 13 swings at a greater amplitude than the rocker arm 14 on the corresponding side of the shorter crank 13. This causes one end of the upper blade holder 15 (the end connected to the rocker arm 14 on the longer crank 13 side) to move downwards a greater distance, allowing that end of the upper blade 16 to contact the lower blade 16 first. As the dual-output shaft drive motor 12 continues to rotate, the end of the upper blade 16 on the corresponding side of the shorter crank 13 gradually moves downwards, forming a gradual cutting motion from one end to the other with the lower blade 16, i.e., scissor-type cutting. During the rotation of the longer crank 13, the connecting piece slides within the straight groove, compensating for the movement deviation between the longer and shorter cranks 13, ensuring that the upper blade holder 15 remains horizontal and avoids tilting.

[0104] This scissor-style cutting method can disperse the cutting force and reduce the impact of a single cut. It is not only more labor-saving, but also avoids the upper and lower blades 16 from making synchronous contact and bumping, effectively protecting the contact surface of the blades 16 and extending the service life of the blades 16.

[0105] Alternatively, the joystick 14 can be set to a lever of different lengths, with the same effect.

[0106] System overall operation steps:

[0107] (1) Preliminary preparation: Adjust the spacing of the front end of the frame 1 to match the width of the raw material; adjust the spacing of the rear end of the frame 1 to match the width of the corrugated board; check the size and angle of the convex rings of each pressure roller group and auxiliary pressure roller group 9 to ensure that they meet the design requirements; check the sharpness of the cutting tool 16 and the smoothness of the sliding of the tool holder 15.

[0108] (2) Sheet material input and center pressing: Place the sheet material on the conveying structure (such as a conveyor belt) at the front end of the frame 1, start the conveying structure, and the sheet material enters the first set of primary pressure rollers 2 under the guidance of the inlet positioning plate 10. The primary pressure rollers 2 perform preliminary pressing on the center area of ​​the sheet material at a side angle of 10° to form shallow ripples; then the sheet material passes through the primary pressure rollers 2 with side angles of 30°, 50° and 80° in sequence, and the depth and angle of the ripples in the center area gradually reach the design requirements; finally, it enters the primary auxiliary pressure rollers 9 to perform secondary shaping of the center ripples.

[0109] (3) Transition area pressing: The board material that has completed the center pressing enters the first group of secondary pressing rollers 3 (retaining the middle primary convex ring 5). The secondary convex ring 6 initially presses the transition area between the center and the two sides according to the set size difference. Then it passes through the secondary pressing roller group 3 in sequence (removing the middle primary convex ring 5 from the second group). The corrugation size of the transition area is gradually formed. Finally, it enters the secondary auxiliary pressing roller group 9 to reshape the corrugation of the transition area to ensure a smooth connection with the center area.

[0110] (3) Side pressing: The board enters multiple sets of three-stage pressure rollers 4, and the three-stage convex rings 7 press the two sides step by step according to the size difference of equal number, and the corrugations on both sides gradually reach the design size; finally, it enters the three-stage auxiliary pressure rollers 9 to reshape the corrugations on both sides, forming a complete and regular corrugated board structure.

[0111] (4) Corrugated board conveying and cutting: Under the guidance of the guide plate, the formed corrugated board is conveyed to the bottom of the cutting assembly. The dual output shaft drive motor 12 is started, and the long crank 13 and the short crank 13 rotate synchronously, driving one end of the upper blade holder 15 to move downward first. The upper blade 16 and the lower blade 16 form a scissor-like cutting to cut the corrugated board to a fixed length. After the cutting is completed, the drive motor drives the blade holder 15 to reset, and the cut corrugated board is conveyed to the finished product collection area through the conveying structure (such as a conveyor belt) at the rear end of the frame 1.

[0112] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0113] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0114] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A corrugated board press roller plastic forming production line comprising a frame (1), characterized in that, The rack (1) is sequentially provided with a first pressing roller group (2) for center pressing, a second pressing roller group (3) for pressing between the center and two sides, and a third pressing roller group (4) for pressing the two sides, each of the pressing roller groups comprising an upper pressing roller and a lower pressing roller; The two pressing rollers of the first pressing roller group (2) are each provided with three groups of first convex rings (5) connected in sequence, the abutment of the three groups of first convex rings (5) on the upper pressing roller is concave (502), and the abutment of the three groups of first convex rings (5) on the lower pressing roller is convex (501); The two pressing rollers of the second pressing roller group (3) are each provided with a group of second convex rings (6) on the two sides of the three groups of first convex rings (5) on the basis of the first pressing roller group (2), the caliber of the second convex rings (6) on the upper pressing roller is smaller than that of the first convex rings (5), and the caliber of the second convex rings (6) on the lower pressing roller is larger than that of the first convex rings (5); The two pressing rollers of the third pressing roller group (4) are each provided with a group of third convex rings (7) on the two sides of the two groups of second convex rings (6) on the basis of the second pressing roller group (3), the caliber of the third convex rings (7) on the upper pressing roller is larger than that of the second convex rings (6), and the caliber of the third convex rings (7) on the lower pressing roller is smaller than that of the second convex rings (6); The first pressing roller group (2), the second pressing roller group (3), and the third pressing roller group (4) are each provided with multiple groups; The amplitude of the concave (502) and the convex (501) of the abutment of the first convex rings (5) of the multiple first pressing roller groups (2) increases in sequence; The caliber of the second convex rings (6) of the multiple second pressing roller groups (3) changes in stages; The caliber of the third convex rings (7) of the multiple third pressing roller groups (4) changes in stages; The maximum size difference between the second convex rings (6) and the first convex rings (5) and the maximum size difference between the third convex rings (7) and the second convex rings (6) are equal to the maximum amplitude of the convex (501) of the abutment of the first convex rings (5); The lower pressing roller corresponding to the first pressing roller group (2) is further provided with a first sleeve ring on the two sides of the first convex ring (5), the caliber of the first sleeve ring is the same as that of the first convex ring (5); the lower pressing roller corresponding to the second pressing roller group (3) is provided with a second sleeve ring on the two sides of the second convex ring (6), the caliber of the second sleeve ring is the same as that of the corresponding second convex ring (6); and the lower pressing roller corresponding to the third pressing roller group (4) is provided with a third sleeve ring on the two sides of the third convex ring (7), the caliber of the third sleeve ring is the same as that of the corresponding third convex ring (7).

2. The corrugated board press roller molding production line according to claim 1, characterized in that, The first pressing roller group (2) is provided with four groups, the side angle changes of the concave (502) and the convex (501) are 10°, 30°, 50°, and 80°; the sizes of the second convex rings (6) and the third convex rings (7) of the multiple second pressing roller groups (3) and the multiple third pressing roller groups (4) change in sequence.

3. The corrugated board press roller molding production line according to claim 1, characterized in that, The second pressing roller group (3) is provided with multiple groups, and the first convex ring (5) in the middle is removed from the second group.

4. The corrugated board press roller molding production line according to claim 1, characterized in that, Three groups of auxiliary pressing roller groups (9) are further provided, and the three groups of auxiliary pressing roller groups (9) are completely the same as and adjacent to the last group of the first pressing roller group (2), the second pressing roller group (3), and the third pressing roller group (4).

5. The corrugated board press roller molding production line according to claim 1, characterized in that, The rear end of the rack (1) is provided with a cutting assembly, the cutting assembly comprises an arch frame (11), two groups of knife holders (15) are vertically slidably installed on the arch frame (11), the opposite surfaces of the two groups of knife holders (15) are provided with cutters (16), and the two groups of knife holders (15) are driven to synchronously move oppositely or in opposite directions by a driving structure.

6. The corrugated board press roller molding production line according to claim 5, characterized in that, The driving structure comprises a double-output-shaft driving motor (12) fixed on the arch frame (11), a crank (13) is arranged on each output shaft of the double-output-shaft driving motor (12), a rocker (14) is rotatably installed at the end of the crank (13), the rocker (14) is rotatably connected to the upper knife holder (15), a pulley (17) is arranged on the arch frame (11) and located above the upper knife holder (15), a steel strand (18) is arranged on the upper knife holder (15), and the other end of the steel strand (18) is connected to the lower knife holder (15) after passing through the pulley (17).

7. The corrugated board press roller molding production line according to claim 6, characterized in that, The lengths of the two groups of cranks (13) are different, a sliding groove is arranged on the upper knife holder (15) and located on the side of the longer crank (13), and the connecting piece of the crank (13) and the knife holder (15) is slidably arranged in the sliding groove.

8. The corrugated board press roller molding production line according to claim 7, characterized in that, The front end of the rack (1) is provided with two groups of spacing-adjustable guiding positioning plates (10) for guiding the input of the planar plate.

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