A high-strength double-wall corrugated paper core production and processing flattening device

Abstract

The application relates to the technical field of corrugated paper production, and particularly discloses a flattening equipment for high-strength double-corrugated paper core production and processing, which comprises an equipment cover, an upper core feeding mechanism arranged above the feeding side of the equipment cover, a middle paper feeding mechanism arranged in the middle of the feeding side of the equipment cover, a lower core feeding mechanism arranged below the feeding side of the equipment cover and used for feeding the lower layer paper core into the flattening equipment, a conveying belt arranged at the middle position of the equipment cover, a flattening mechanism arranged above the conveying belt, a self-adaptive gluing mechanism arranged between the flattening mechanism and the middle paper feeding mechanism, a lifting mechanism fixedly arranged at the bottom end of the equipment cover, and a control unit used for receiving an adjusting signal. The flattening equipment can realize thickness change sensing and linkage gluing position in the gluing stage, and can realize flattening height self-adaption and has high efficient solidification capacity in the pressing stage.

Description

Technical Field

[0001] This invention relates to the field of corrugated paper production technology, specifically to a flattening device for the production and processing of high-strength double-corrugated paper cores. Background Technology

[0002] High-strength double-walled paper cores are typically formed by laminating an upper core, a middle core, and a lower core. During production, adhesive needs to be stably and evenly applied to the corrugated surfaces of both the upper and lower cores. After multiple layers are stacked, they are flattened and pressed together to allow the adhesive layer to spread and cure under pressure. However, in actual continuous production, the thickness, flute height, and paper feeding conditions of different batches of paper cores vary according to customer requirements, placing different demands on the equipment. Existing equipment is prone to problems where the adhesive application position and contact pressure cannot be matched in real time with changes in thickness, leading to insufficient adhesive, adhesive buildup, or uneven application. Simultaneously, if the flattening height of the flattening mechanism cannot adaptively adjust with thickness changes, uneven pressure, corrugation crushing, or insufficient pressing may occur, thus affecting the strength and flatness of the finished product. In addition, if the curing of adhesives relies on an external air source or other curing methods, the structure is often complex and the energy consumption is high. Furthermore, the airflow is difficult to act on the corrugated channel in the appropriate direction during the pressing stage, which limits the curing efficiency and stability. Therefore, a flattening device is needed that can sense the thickness change and coordinate the adhesive application position during the adhesive application stage, while achieving adaptive flattening height and high-efficiency curing capability during the pressing stage. Summary of the Invention

[0003] This application provides a flattening device for the production and processing of high-strength double-corrugated paper cores. The main purpose is to provide a flattening device that can sense thickness changes and coordinate the glue application position during the glue application stage, while achieving adaptive flattening height and efficient curing capability during the pressing stage.

[0004] To achieve the above objectives, this application provides a flattening device for producing high-strength double-walled paper cores, comprising:

[0005] Equipment casing;

[0006] The upper core feeding mechanism is located above the feeding side of the equipment cover and is used to feed the upper paper core into the flattening equipment.

[0007] The paper feeding mechanism is located in the middle of the feed side of the equipment cover and is used to feed the paper entering the flattening equipment.

[0008] The lower core feeding mechanism is located below the feeding side of the equipment cover and is used to feed the lower paper cores that enter the flattening equipment.

[0009] The conveyor belt is located in the middle of the outer casing of the equipment;

[0010] A flattening mechanism is located above the conveyor belt and can flatten the composite corrugated paper layer on the conveyor belt and cure the adhesive through its own movement.

[0011] An adaptive gluing mechanism is located between the flattening mechanism and the middle paper feeding mechanism. It is used to apply glue to the corrugated surfaces of the upper and lower paper cores that enter the flattening mechanism, and to generate corresponding adjustment signals according to the different thicknesses of the corrugated paper cores.

[0012] A lifting mechanism is fixedly installed at the bottom of the equipment cover, and the top lifting end of the lifting mechanism is connected to the flattening mechanism.

[0013] The control unit is used to receive the adjustment signal and correspondingly control the lifting mechanism to drive the flattening mechanism to achieve a flattening height suitable for the current size of the corrugated cardboard.

[0014] In one feasible embodiment, the flattening mechanism includes: a base vertically movable on the telescopic end of the top of the lifting mechanism; a dual-axis motor located at the middle of the top of the base; two drive shafts rotatably mounted on the base on both sides of the dual-axis motor; two drive rods parallel to each other and locked to the ends of the drive shafts; a protruding rod fixed to the outer side of the ends of the drive shafts and at the same horizontal height as the axis of the drive shafts; a limiting rod rotatably connected to the protruding rod at its bottom end, and the length of the limiting rod being greater than that of the protruding rod; an actuating rod rotatably connected to the drive rod at its bottom end, and the middle part of the actuating rod rotatably connected to the top of the limiting rod; two ends of the flattening platform respectively connected to the tops of the four actuating rods; the bottom end face of the flattening platform being horizontal and located above the conveyor belt; and a cooling and curing assembly mounted on the flattening platform, the cooling and curing assembly having an air outlet located on the side of the laminated corrugated cardboard, with the air outlet direction parallel to the corrugated stripe direction.

[0015] In one feasible embodiment, the cooling and curing assembly includes: at least one automatic gas collection unit fixedly disposed at the end of the flattening platform and tractively connected to the end of the actuating rod, the gas collection unit being used to generate compressed gas during the pressing of the flattening platform; an airflow release unit disposed on the side of the flattening platform and positioned directly opposite the side of the corrugated cardboard when the flattening platform is fully pressed down, the airflow release unit being connected to the automatic gas collection unit; and an airflow switch unit including a push-button switch disposed below the airflow release unit and a linear trigger rod for triggering the push-button switch, the linear trigger rod being parallel to the conveying direction of the corrugated cardboard and fixedly disposed on the side of the conveyor belt.

[0016] In one feasible embodiment, the automatic air collection unit includes: a rotating rod fixedly locked to the end of one of the actuating rods and located inside the flattening platform; a telescopic rod linearly extendable and retractable, disposed inside the other end of the rotating rod away from the currently connected actuating rod, and the telescopic rod is provided with a helical drive groove, and a drive post movably engaged in the helical drive groove is provided on the inner wall of the rotating rod; an outer fixing cylinder is fixed to the flattening platform, the outer fixing cylinder is sleeved on the outside of the telescopic rod, and a moving piston is disposed in the inner cavity of the outer fixing cylinder, the moving piston being connected to the telescopic rod; an air intake one-way valve is fixedly disposed in the side wall of the outer fixing cylinder away from the telescopic rod; one end of an air supply pipe is connected to the inner cavity of the outer fixing cylinder next to the air intake one-way valve, and the other end is connected to the airflow release unit.

[0017] In one feasible implementation, the airflow release unit includes: an air collection cylinder fixedly disposed on one side of the flattening platform and connected to the other end of the air supply pipe; and an air release nozzle fixedly disposed on the side wall of the air collection cylinder facing the corrugated cardboard.

[0018] In one feasible embodiment, the adaptive gluing mechanism includes: two outer fixing plates fixedly disposed inside the equipment casing; two guide positioning plates respectively fixedly disposed in the inner cavities of the equipment casing on the upper and lower sides of the conveyor belt end; and respectively used to guide the upper paper core and the lower paper core; paper core pressing plates spaced apart and movably disposed outside the guide positioning plates, with arc-shaped guide ends provided on both sides of the paper core pressing plates; a gluing assembly fixedly disposed between the two outer fixing plates, the gluing assembly being used to apply glue to the corrugated surfaces of the passing upper and lower paper cores; a synchronous displacement assembly disposed on the outer wall of the outer fixing plates, used to control the gluing position of the gluing assembly to change synchronously with the movement of the paper core pressing plates; and a displacement signal generation assembly connected to the synchronous displacement assembly, used to output the displacement of the two paper core pressing plates to the control unit.

[0019] In one feasible embodiment, the glue coating assembly includes: two glue coating fixed end plates fixedly disposed on the inner sides of the two outer fixed plates; two glue coating rollers rotatably disposed on the upper and lower sides between the two glue coating fixed end plates; and a displacement groove formed on the glue coating fixed end plates so that the ends of the glue coating rollers pass through, and the displacement groove is perpendicular to the paper core pressure plate.

[0020] In one feasible embodiment, the synchronous displacement assembly includes: a synchronous moving track fixedly disposed on the outer end face of the outer fixed plate; a synchronous drive plate slidably disposed on the synchronous moving track, the synchronous drive plate having protrusions at both ends extending toward the paper core pressing plate and the glue coating roller, the protrusions having strip grooves; a first synchronous displacement clamping member fixedly disposed on the end of the paper core pressing plate and movably engaged in one of the strip grooves; and a second synchronous displacement clamping member fixedly disposed on the outer side of the end of the glue coating roller and movably engaged in the other strip groove.

[0021] In one feasible implementation, the displacement signal generating component includes: an end limiting block fixedly mounted on the outer fixing plate and located at the end of the synchronous moving track; a telescopic rack with one end fixedly connected to the synchronous drive plate and the other end capable of telescopically extending into the inner cavity of the end limiting block and meshing with a gear inside the end limiting block; a shaft damping element fixedly mounted on the side of the end limiting block and connected to the shaft of the gear; and a rotary encoder fixedly mounted on the other end of the end limiting block and drivenly connected to the shaft of the gear.

[0022] This application provides a high-strength double-walled paper core production and processing flattening device. During the coating stage, an adaptive gluing mechanism applies glue to the corrugated surfaces of both the upper and lower layers of the paper core. Based on changes in paper core thickness, an adjustment signal is output, and a control unit drives a lifting mechanism to adjust the flattening height of the flattening mechanism. This allows the flattening mechanism to match corrugated cardboard of different thicknesses, preventing crushing or insufficient pressing, and improving pressing consistency and finished product flatness. Simultaneously, the paper core pressure plate, synchronous displacement component, and gluing component within the adaptive gluing mechanism are linked, allowing the gluing position of the gluing component to change synchronously with the movement of the paper core pressure plate. This maintains a stable contact gluing state even with thickness fluctuations, reducing... This invention reduces glue shortages, glue accumulation, and uneven glue application, thereby improving composite strength. Furthermore, the cooling and curing components of the flattening mechanism generate compressed gas through an automatic gas collection unit during the pressing process of the flattening platform. After the flattening platform is fully pressed into place, the airflow switch triggers the airflow release unit for directional blowing. The air outlet is located on the side of the composite corrugated cardboard, and the airflow direction is parallel to the corrugated stripe direction, making the airflow more conducive to flow along the corrugated channel to accelerate glue curing and improve curing efficiency and stability. In summary, this application can achieve adaptive and coordinated control of glue application and flattening curing in continuous production. It has a compact structure, high curing efficiency, and stable finished product quality, and is particularly suitable for the production and processing of high-strength double-corrugated paper cores. Attached Figure Description

[0023] Figure 1 This invention provides a schematic diagram of the structure of a flattening device for producing high-strength double-corrugated paper cores according to an embodiment of this application.

[0024] Figure 2 This paper shows a schematic diagram of the location of the cooling and curing component provided in an embodiment of this application;

[0025] Figure 3 A schematic diagram of the adaptive adhesive application mechanism provided in an embodiment of this application is shown;

[0026] Figure 4 A schematic diagram of the adhesive coating assembly provided in an embodiment of this application is shown;

[0027] Figure 5 A schematic diagram of the flattening mechanism provided in an embodiment of this application is shown;

[0028] Figure 6 A schematic diagram of the structure of the dual-axis motor provided in an embodiment of this application is shown;

[0029] Figure 7 A schematic diagram of the structure of the cooling and curing assembly provided in an embodiment of this application is shown;

[0030] Figure 8 A schematic diagram of the displacement signal generation component provided in an embodiment of this application is shown;

[0031] Figure 9 A schematic diagram of the airflow switch unit provided in an embodiment of this application is shown.

[0032] In the diagram: 10. Equipment casing; 20. Upper core feeding mechanism; 30. Middle paper feeding mechanism; 40. Lower core feeding mechanism; 50. Flattening mechanism; 60. Adaptive gluing mechanism; 70. Conveyor belt; 80. Control unit; 90. Lifting mechanism; 51. Base; 52. Dual-axis motor; 53. Drive shaft; 54. Drive rod; 55. Protruding rod; 56. Limiting rod; 57. Action rod; 58. Flattening platform; 59. Cooling and curing assembly; 591. Automatic air collection unit; 592. Airflow release unit; 593. Airflow switch unit; 5911. Rotating rod; 5912. Telescopic rod; 5913. Outer fixing cylinder; 5914. 5915. Inlet check valve; 5921. Air supply pipe; 5922. Air collection cylinder; 5923. Air vent; 61. Paper core pressure plate; 611. Arc-shaped guide end; 62. Guide positioning plate; 63. Glue application assembly; 64. Synchronous displacement assembly; 65. Displacement signal generation assembly; 66. Outer fixing plate; 631. Glue application fixing end plate; 632. Glue application roller; 633. Displacement groove; 641. Synchronous drive plate; 642. Synchronous moving track; 643. First synchronous displacement clamp; 644. Second synchronous displacement clamp; 651. End limit block; 652. Rotary shaft damping component; 653. Rotary encoder; 654. Telescopic rack. Detailed Implementation

[0033] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0034] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0035] Please see Figures 1 to 9 As shown in the figure, this application provides a flattening device for producing and processing high-strength double corrugated paper cores, including: an outer cover 10, an upper core feeding mechanism 20, a middle paper feeding mechanism 30, a lower core feeding mechanism 40, a flattening mechanism 50, an adaptive gluing mechanism 60, a conveyor belt 70, a control unit 80, and a lifting mechanism 90.

[0036] Specifically, the upper core feeding mechanism 20 is located above the feed side of the equipment cover 10 and is used to feed the upper paper cores entering the flattening device; the middle paper feeding mechanism 30 is located in the middle of the feed side of the equipment cover 10 and is used to feed the middle paper entering the flattening device; the lower core feeding mechanism 40 is located below the feed side of the equipment cover 10 and is used to feed the lower paper cores entering the flattening device; the conveyor belt 70 is located in the middle of the equipment cover 10; and the flattening mechanism 50 is located above the conveyor belt 70 and can press the composite corrugated board on the conveyor belt 70 in the conveying state through its own movement. The paper layers are flattened and the glue is cured; the adaptive glue coating mechanism 60 is set between the flattening mechanism 50 and the middle paper feeding mechanism 30, and is used to coat the upper and lower corrugated surfaces of the paper core entering the flattening mechanism 50 with glue, and to generate corresponding adjustment signals according to the corrugated paper cores of different thicknesses and sizes; the lifting mechanism 90 is fixedly set at the bottom of the equipment cover 10, and the top lifting end of the lifting mechanism 90 is connected to the flattening mechanism 50; the control unit 80 is used to receive the adjustment signals and correspondingly control the lifting mechanism 90 to drive the flattening mechanism 50 to achieve a flattening height suitable for the current size of the corrugated cardboard.

[0037] This application integrates the lamination process of the upper paper core, middle paper, and lower paper core into a single device. The upper paper core feeding mechanism 20 is positioned above the feed side of the device cover 10 to stably feed the upper paper core. The middle paper feeding mechanism 30 is located in the middle of the feed side of the device cover 10 to convey the middle paper. The lower paper core feeding mechanism 40 is located below the feed side of the device cover 10 to convey the lower paper core. The conveyor belt 70 is positioned in the middle of the device cover 10 to carry and continuously convey the composite corrugated paper layer into the flattening station and continue its outgoing operation. An adaptive gluing mechanism 60 is positioned between the flattening mechanism 50 and the middle paper feeding mechanism 30 to apply glue to the corrugated surfaces of the upper and lower paper cores before they enter the flattening mechanism 50, and outputs corresponding adjustment signals when the paper core thickness changes. The flattening mechanism 50 is positioned above the conveyor belt 70 and flattens and cures the glue on the composite corrugated paper layer during its conveying process through its own movement. The lifting mechanism 90 is fixed to the bottom of the equipment cover 10, and its top lifting end is connected to the flattening mechanism 50. It is used to change the flattening height of the flattening mechanism 50 to adapt to the height of the material entering the flattening mechanism 50. The control unit 80 receives the adjustment signal and controls the lifting mechanism 90 to drive the flattening mechanism 50 to match the current size of the corrugated cardboard, thereby directly converting the thickness change sensed at the glue coating station into adaptive flattening height, ensuring stable pressing quality when completing different types of corrugated strips.

[0038] like Figure 5As shown, in some examples, the flattening mechanism 50 further includes: a base 51, a dual-axis motor 52, two drive shafts 53, two drive rods 54, a protruding rod 55, a limiting rod 56, an actuating rod 57, a flattening platform 58, and a cooling and curing assembly 59. The base 51 is vertically and vertically mounted on the telescopic end of the lifting mechanism 90; the dual-axis motor 52 is located at the center of the top of the base 51; the two drive shafts 53 are rotatably mounted on the base 51 on both sides of the dual-axis motor 52; the two drive rods 54 are parallel to each other and locked to the ends of the drive shafts 53; the protruding rods 55 are fixed to the outer sides of the ends of the drive shafts 53, and... The axis of the drive shaft 53 is at the same horizontal height; the bottom end of the limiting rod 56 is rotatably connected to the protruding rod 55, and the length of the limiting rod 56 is greater than that of the protruding rod 55; the bottom end of the actuating rod 57 is rotatably connected to the drive rod 54, and the middle part of the actuating rod 57 is rotatably connected to the top end of the limiting rod 56; the two ends of the flattening platform 58 are respectively connected to the top ends of the four actuating rods 57; the bottom end face of the flattening platform 58 is horizontal and located above the conveyor belt 70; the cooling and curing assembly 59 is set on the flattening platform 58, and the cooling and curing assembly 59 has an air outlet end, which is located on the side of the composite corrugated cardboard, and the air outlet direction is parallel to the direction of the corrugated stripes.

[0039] To ensure smooth and synchronized flattening action and keep the flattening platform 58 level, the base 51 is vertically adjustable on the telescopic end of the lifting mechanism 90, allowing the flattening mechanism 50 to adjust up and down with the lifting mechanism 90. A dual-axis motor 52 is positioned at the center of the top of the base 51, driving two transmission shafts 53 via dual outputs. These two transmission shafts 53 are rotatably mounted on the base 51 on either side of the dual-axis motor 52, symmetrically distributing power to the left and right sides. Two drive rods 54 are parallel to each other and locked to the ends of the transmission shafts 53. A protruding rod 55 is fixed to the outer side of both ends of the transmission shafts 53 and at the same horizontal level as the axis of the transmission shafts 53, fixed and non-rotating. The protruding rod 55 forms a restricted linkage with the limiting rod 56 and the actuating rod 57. The bottom end of the limiting rod 56 is rotatably connected to the protruding rod 55, and the length of the limiting rod 56 is greater than that of the protruding rod 55, constraining the movement trajectory of the actuating rod 57. The bottom end of the actuating rod 57 is rotatably connected to the drive rod 54, and its middle part is rotatably connected to the top of the limiting rod 56, ensuring synchronized action on both sides. The flattening platform 58 is connected to the tops of four actuating rods 57 at both ends. The bottom surface of the flattening platform 58 is horizontal and located above the conveyor belt 70, thus providing uniform flattening pressure as the composite corrugated paper layer passes over it, pressing it onto the composite cardboard. Then, it continues to move parallel to the conveyor belt 70 at a synchronized speed, keeping the cardboard pressed, before returning to its original position and moving downwards again, completing the overall cycle. The cooling and curing assembly 59 is located on the flattening platform 58, with its air outlet located on the side of the composite corrugated cardboard, and the air outlet direction parallel to the corrugated stripe direction. This creates an effective lateral airflow for the adhesive curing during the pressing and translation phase, quickly promoting the flattened corrugated paper cores to remain fixed in a flat position.

[0040] like Figure 7 and Figure 9 As shown, in some examples, the cooling and curing assembly 59 further includes: at least one automatic gas collection unit 591, an airflow release unit 592, and an airflow switch unit 593. The at least one automatic gas collection unit 591 is fixedly disposed at the end of the flattening platform 58 and is drively connected to the end of the actuating rod 57. The gas collection unit is used to generate compressed gas during the pressing of the flattening platform 58. The airflow release unit 592 is disposed on the side of the flattening platform 58 and is positioned directly opposite the side of the corrugated cardboard when the flattening platform 58 is fully pressed down. The airflow release unit 592 is connected to the automatic gas collection unit 591. The airflow switch unit 593 includes a push-button switch disposed below the airflow release and a linear trigger rod that triggers the push-button switch. The linear trigger rod is parallel to the conveying direction of the corrugated cardboard and is fixedly disposed on the side of the conveyor belt 70.

[0041] To ensure a stable air supply to the cooling and curing assembly 59 without relying on an external air source, and to effectively blow air onto the cardboard only when it is fully flattened, this embodiment defines the cooling and curing assembly 59 as at least one automatic air collection unit 591, an airflow release unit 592, and an airflow switch unit 593. At least one automatic air collection unit 591 is fixed to the end of the flattening platform 58 and is drively connected to the end of the actuating rod 57, so that the automatic air collection unit 591 can be activated when the flattening platform 58 is pressed down, thereby generating compressed gas during the pressing process. The airflow release unit 592 is located on the side of the flattening platform 58, and when the flattening platform 58 is fully pressed down, it faces the side of the corrugated cardboard and communicates with the automatic air collection unit 591 to guide the compressed gas to the side of the cardboard. The airflow switch unit 593 adopts a push-button switch and a linear trigger rod triggering logic. The push-button switch is located at the bottom of the airflow release, and the linear trigger rod is parallel to the corrugated cardboard conveying direction and fixed to the side of the conveyor belt 70, so that the airflow release and the flattening into place form a clear timing relationship, avoiding ineffective curing or airflow interference caused by premature air release.

[0042] like Figure 7 As shown, in some examples, the automatic air collection unit 591 further includes: a rotating rod 5911, a telescopic rod 5912, an outer fixed cylinder 5913, an air inlet check valve 5914, and an air supply pipe 5915. The rotating rod 5911 is fixedly locked to the end of one of the actuating rods 57 and is located inside the flattening platform 58. The telescopic rod 5912 is linearly telescopically arranged inside the other end of the rotating rod 5911 away from the currently connected actuating rod 57, and the telescopic rod 5912 is provided with a helical drive groove. The inner wall of the rotating rod 5911 is provided with... A drive column is provided that is movably engaged in the spiral drive groove; an outer fixed cylinder 5913 is fixed on the flattening platform 58 and is sleeved on the outside of the telescopic rod 5912. A moving piston is provided in the inner cavity of the outer fixed cylinder 5913 and is connected to the telescopic rod 5912; an air intake check valve 5914 is fixedly installed in the outer fixed cylinder 5913 at one end of the side wall away from the telescopic rod 5912; one end of the air supply pipe 5915 is connected to the inner cavity of the outer fixed cylinder 5913 next to the air intake check valve 5914, and the other end is connected to the airflow release part 592.

[0043] To reliably convert the motion of the actuating rod 57 into output compressed gas, a rotating rod 5911 is fixedly locked to the end of one of the actuating rods 57 and located inside the flattening platform 58, causing the rotating rod 5911 to rotate relative to the flattening platform. A telescopic rod 5912 is linearly telescopically positioned inside the rotating rod 5911 at the end furthest from the currently connected actuating rod 57. The telescopic rod 5912 has a helical drive groove, while the inner wall of the rotating rod 5911 has a drive post that is movably engaged in the helical drive groove, thus converting the rotational motion into the reciprocating linear motion of the telescopic rod 5912. An outer fixed cylinder 5913 is fixed to the flattening platform 58 and sleeved on the outside of the telescopic rod 5912. The inner cavity of the outer fixed cylinder 5913 has a moving piston connected to the telescopic rod 5912, causing the telescopic rod 5912 to reciprocate and drive the moving piston to compress the gas. An intake check valve 5914 is fixed in the side wall of the outer fixed cylinder 5913 away from the telescopic rod 5912, and is used for return air replenishment and to suppress backflow during the compression stage. One end of the air supply pipe 5915 is connected to the inner cavity of the outer fixed cylinder 5913 next to the intake check valve 5914, and the other end is connected to the airflow release part 592, which stably delivers compressed gas to the release position.

[0044] like Figure 7 As shown, in some examples, the airflow release unit 592 further includes: an air collection cylinder 5921 and an air release nozzle 5922. The air collection cylinder 5921 is fixedly disposed on one side of the flattening platform 58 and connected to the other end of the air supply pipe 5915; the air release nozzle 5922 is fixedly disposed on the side wall of the air collection cylinder 5921 facing the corrugated cardboard side.

[0045] To ensure a clear and stable jet outlet for compressed gas on the side of the cardboard, this embodiment defines the airflow release unit 592 as a gas collecting cylinder 5921 and a venting nozzle 5922. The gas collecting cylinder 5921 is fixed to one side of the flattening platform 58 and connected to the other end of the air supply pipe 5915, used to collect and smoothly output the compressed gas supplied by the automatic gas collecting unit 591. The venting nozzle 5922 is fixed to the side wall of the gas collecting cylinder 5921 facing the corrugated cardboard, allowing gas to be ejected from the side of the corrugated cardboard. Combined with the arrangement logic of the cooling and curing assembly 59, where the air outlet direction is parallel to the corrugated stripe direction, the venting nozzle 5922 can guide the airflow along the corrugated channel direction, thereby more effectively removing moisture and heat from the adhesive layer, improving curing speed and consistency.

[0046] like Figure 3 and Figure 4As shown, in some examples, the adaptive gluing mechanism 60 further includes: a paper core pressing plate 61, two guide positioning plates 62, a gluing assembly 63, a synchronous displacement assembly 64, a displacement signal generation assembly 65, and two outer fixing plates 66. The two outer fixing plates 66 are fixedly disposed inside the equipment cover 10; the two guide positioning plates 62 are respectively fixedly disposed in the inner cavity of the equipment cover 10 on the upper and lower sides of the end of the conveyor belt 70; and are respectively used to guide the upper paper core and the lower paper core; the paper core pressing plate 61 is spaced apart and movably disposed in the guide positioning... On the outer side of the plate 62, arc-shaped guide ends 611 are provided on both sides of the paper core pressing plate 61; the glue application assembly 63 is fixedly installed between the two outer fixing plates 66, and the glue application assembly 63 is used to apply glue to the corrugated surfaces of the upper and lower paper cores; the synchronous displacement assembly 64 is installed on the outer wall of the outer fixing plate 66, and is used to control the glue application position of the glue application assembly 63 to change synchronously with the movement of the paper core pressing plate 61; the displacement signal generation assembly 65 is connected to the synchronous displacement assembly 64, and is used to output the displacement of the two paper core pressing plates 61 to the control unit 80.

[0047] To simultaneously guide, press, and sense the displacement of the upper and lower paper cores at the gluing station, and output the displacement to the control unit 80 for subsequent flattening height matching, this embodiment configures the adaptive gluing mechanism 60 as a paper core pressing plate 61, two guide positioning plates 62, a gluing assembly 63, a synchronous displacement assembly 64, a displacement signal generation assembly 65, and two external fixing plates 66. The two external fixing plates 66 are fixed inside the equipment casing 10 as a support and installation base. The two guide positioning plates 62 are fixed inside the equipment casing 10 on the upper and lower sides of the conveyor belt 70 end, guiding the upper and lower paper cores respectively, ensuring stable positioning when entering the gluing area. The paper core pressing plates 61 are spaced apart and movably arranged outside the guide positioning plates 62. Arc-shaped guide ends 611 are provided on both sides of the paper core pressing plates 61 to facilitate smoother paper core entry and to push the paper core pressing plates 61 to generate controllable displacement when the thickness changes. The gluing assembly 63 is fixed between two outer fixing plates 66, applying glue to the corrugated surfaces of the upper and lower paper cores. A synchronous displacement assembly 64 is mounted on the outer wall of the outer fixing plates 66, controlling the glue application position of the gluing assembly 63 to change synchronously with the movement of the paper core pressing plates 61, maintaining stable contact glue application conditions. Regardless of the height of the corrugated paper core, the glue application position, area, and amount remain relatively constant. A displacement signal generation assembly 65 is connected to the synchronous displacement assembly 64, outputting the displacement of the two paper core pressing plates 61 to the control unit 80, thus converting thickness changes into a directly controllable signal input, supporting subsequent flattening position adjustment of the flattening assembly.

[0048] like Figure 4As shown, in some examples, the glue coating assembly 63 further includes: two glue coating fixed end plates 631, two glue coating rollers 632, and a displacement groove 633. The two glue coating fixed end plates 631 are fixedly disposed on the inner side of the two outer fixed plates 66; the two glue coating rollers 632 are rotatably disposed on the upper and lower sides between the two glue coating fixed end plates 631; the displacement groove 633 is formed on the glue coating fixed end plate 631 so that the end of the glue coating roller 632 passes through, and the displacement groove 633 is perpendicular to the paper core pressure plate 61.

[0049] To ensure uniform glue application between the upper and lower paper cores and to allow the glue application position to be adjusted according to the displacement of the paper core pressure plate 61, this embodiment further defines the glue application assembly 63 as two glue application fixed end plates 631, two glue application rollers 632, and a displacement groove 633. The two glue application fixed end plates 631 are fixed inside the two outer fixed plates 66, forming the support frame of the glue application assembly 63. The two glue application rollers 632 are rotatably disposed on the upper and lower sides between the two glue application fixed end plates 631 and are connected to a constant glue supply channel, so that the corrugated surfaces of the upper and lower paper cores respectively contact the corresponding glue application rollers 632 for glue application when passing through. The displacement groove 633 is formed on the glue-coating fixed end plate 631 and passes through the end of the glue-coating roller 632. The displacement groove 633 is perpendicular to the paper core pressure plate 61, so that the end of the glue-coating roller 632 has a controlled displacement space in the vertical direction. This provides a structural basis for the synchronous displacement component 64 to drive the glue-coating roller 632 to change its position, and avoids insufficient glue coating or glue piling caused by changes in flute height.

[0050] like Figure 4 As shown, in some examples, the synchronous displacement assembly 64 further includes: a synchronous drive plate 641, a synchronous moving track 642, a first synchronous displacement clamp 643, and a second synchronous displacement clamp 644. The synchronous moving track 642 is fixedly disposed on the outer end face of the outer fixed plate 66. The synchronous drive plate 641 is slidably disposed on the synchronous moving track 642. Both ends of the synchronous drive plate 641 have protrusions extending toward the paper core pressure plate 61 and the glue coating roller 632, and the protrusions are provided with strip grooves. The first synchronous displacement clamp 643 is fixedly disposed on the end of the paper core pressure plate 61 and is movably engaged in one of the strip grooves. The second synchronous displacement clamp 644 is fixedly disposed on the outer side of the end of the glue coating roller 632 and is movably engaged in the other strip groove.

[0051] To synchronously, proportionally, and with low clearance, transmit the displacement of the paper core plate 61 to the glue coating roller 632, this embodiment defines the synchronous displacement assembly 64 as a synchronous drive plate 641, a synchronous moving track 642, a first synchronous displacement clamp 643, and a second synchronous displacement clamp 644. The synchronous moving track 642 is fixed to the outer end face of the outer fixed plate 66, providing a linear sliding guide for the synchronous drive plate 641. The synchronous drive plate 641 is slidably mounted on the synchronous moving track 642, with protrusions extending towards the paper core plate 61 and the glue coating roller 632 at both ends, and slots are formed on the protrusions to provide clearance space for movement. The first synchronous displacement clamp 643 is fixed to the end of the paper core plate 61 and movably engaged in one of the slots, allowing the displacement of the paper core plate 61 to directly drive the synchronous drive plate 641 to slide. The second synchronous displacement clamp 644 is fixed to the outer side of the end of the coating roller 632 and movably engaged in another strip groove, so that the sliding of the synchronous drive plate 641 further drives the coating roller 632 to generate synchronous displacement. In this way, the movement of the paper core pressure plate 61 that changes with thickness can be converted into the position of the coating roller 632 following the movement, thus ensuring the self-adaptation of the coating position and contact state from a mechanical point of view.

[0052] like Figure 8 As shown, in some examples, the displacement signal generation component 65 further includes: an end limiting block 651, a shaft damping element 652, a rotary encoder 653, and a telescopic rack 654. The end limiting block 651 is fixedly mounted on the outer fixed plate 66 and located at the end of the synchronous moving track 642. One end of the telescopic rack 654 is fixedly connected to the synchronous drive plate 641, and the other end can extend telescopically into the inner cavity of the end limiting block 651 and mesh with the gear inside the end limiting block 651. The shaft damping element 652 is fixedly mounted on the side of the end limiting block 651 and connected to the shaft of the gear. The rotary encoder 653 is fixedly mounted on the other end of the end limiting block 651 and is drively connected to the shaft of the gear.

[0053] To stably convert the displacement of the synchronous drive plate 641 into a quantifiable and jitter-resistant signal output, this embodiment defines the displacement signal generation component 65 as an end limit block 651, a shaft damping component 652, a rotary encoder 653, and a telescopic rack 654. The end limit block 651 is fixed to the outer fixed plate 66 and located at the end of the synchronous moving track 642, forming the installation and limiting space for the detection mechanism. One end of the telescopic rack 654 is fixedly connected to the synchronous drive plate 641, and the other end extends telescopically into the inner cavity of the end limit block 651, meshing with a gear within the end limit block 651, thus converting the linear displacement of the synchronous drive plate 641 into gear rotation. The shaft damping component 652 is fixed to the side of the end limit block 651 and connected to the gear shaft, used to suppress springback and transient jitter, improving signal stability. The rotary encoder 653 is fixed to the other end of the end limit block 651 and is connected to the gear shaft for transmission. It outputs an encoded signal corresponding to the displacement, thereby stably outputting the displacement of the two paper core pressure plates 61 to the control unit 80 in the form of an electrical signal, ensuring that the lifting mechanism 90 has a reliable input basis for controlling and matching the flattening height.

[0054] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A flattening device for producing and processing high-strength double-walled paper cores, characterized in that, include: Equipment casing; The upper core feeding mechanism is located above the feeding side of the equipment cover and is used to feed the upper paper core into the flattening equipment. The paper feeding mechanism is located in the middle of the feed side of the equipment cover and is used to feed the paper entering the flattening equipment. The lower core feeding mechanism is located below the feeding side of the equipment cover and is used to feed the lower paper cores that enter the flattening equipment. The conveyor belt is located in the middle of the outer casing of the equipment; A flattening mechanism is located above the conveyor belt and can flatten the composite corrugated paper layer on the conveyor belt and cure the adhesive through its own movement. An adaptive gluing mechanism is located between the flattening mechanism and the middle paper feeding mechanism. It is used to apply glue to the corrugated surfaces of the upper and lower paper cores that enter the flattening mechanism, and to generate corresponding adjustment signals according to the different thicknesses of the corrugated paper cores. A lifting mechanism is fixedly installed at the bottom of the equipment cover, and the top lifting end of the lifting mechanism is connected to the flattening mechanism. The control unit is used to receive the adjustment signal and correspondingly control the lifting mechanism to drive the flattening mechanism to achieve a flattening height suitable for the current size of the corrugated cardboard.

2. The flattening equipment for producing high-strength double-corrugated paper cores according to claim 1, characterized in that: The flattening mechanism includes: A base, which is vertically movable and mounted on the telescopic end at the top of the lifting mechanism; A dual-axis motor is located at the top center of the base; Two drive shafts are rotatably mounted on the base on both sides of the dual-axis motor; The two drive rods are both parallel to each other and locked to the two ends of the drive shaft; The protruding rod is fixed to the outer side of both ends of the drive shaft and is at the same horizontal height as the axis of the drive shaft; A limiting rod is rotatably connected to the protruding rod at its bottom end, and the length of the limiting rod is greater than that of the protruding rod. An actuating rod, the bottom end of which is rotatably connected to the driving rod, and the middle part of which is rotatably connected to the top end of the limiting rod; The flattening platform has its two ends connected to the tops of the four actuating rods respectively; the bottom end face of the flattening platform is horizontal and located above the conveyor belt; A cooling and curing assembly is disposed on the flattening platform. The cooling and curing assembly has an air outlet located on the side of the laminated corrugated cardboard, and the air outlet direction is parallel to the direction of the corrugated stripes.

3. The flattening equipment for producing high-strength double-corrugated paper cores according to claim 2, characterized in that: The cooling and curing assembly includes: At least one automatic gas collection unit is fixedly installed at the end of the flattening platform and is drively connected to the end of the actuating rod. The gas collection unit is used to generate compressed gas during the pressing process of the flattening platform. An airflow release unit is located on the side of the flattening platform and is positioned directly opposite the side of the corrugated cardboard when the flattening platform is fully pressed down. The airflow release unit is connected to the automatic air collection unit. The airflow switch includes a push-button switch located below the airflow release and a linear trigger rod that triggers the push-button switch. The linear trigger rod is parallel to the conveying direction of the corrugated cardboard and is fixedly located on the side of the conveyor belt.

4. The flattening equipment for producing high-strength double-corrugated paper cores according to claim 3, characterized in that: The automatic gas collection unit includes: A rotating rod is fixedly locked to the end of one of the actuating rods and located inside the flattening platform; A telescopic rod is linearly telescopically arranged on the inner side of the other end of the rotating rod, away from the currently connected actuating rod, and the telescopic rod is provided with a helical drive groove, and the inner wall of the rotating rod is provided with a drive post that is movably engaged in the helical drive groove; An outer fixing cylinder is fixed on the flattening platform. The outer fixing cylinder is sleeved on the outside of the telescopic rod. A moving piston is provided in the inner cavity of the outer fixing cylinder. The moving piston is connected to the telescopic rod. An intake check valve is fixedly installed in the outer fixed cylinder at one end of the side wall away from the telescopic rod. The air supply pipe has one end connected to the inner cavity of the outer fixed cylinder next to the air inlet one-way valve, and the other end connected to the airflow release part.

5. The flattening equipment for producing high-strength double-corrugated paper cores according to claim 4, characterized in that: The airflow release unit includes: An air collection cylinder is fixedly installed on one side of the flattening platform and connected to the other end of the air supply pipe. The vent is fixedly installed on the side wall of the air collection cylinder facing the corrugated cardboard.

6. The flattening equipment for producing high-strength double-corrugated paper cores according to claim 1, characterized in that: The adaptive adhesive application mechanism includes: Two external fixing plates are fixedly installed on the inside of the equipment casing; Two guide positioning plates are respectively fixedly installed in the inner cavity of the equipment cover on the upper and lower sides of the end of the conveyor belt; and are used to guide the upper paper core and the lower paper core respectively. Paper core pressure plates are spaced apart and movably arranged on the outside of the guide positioning plate, and arc-shaped guide ends are provided on both sides of the paper core pressure plates; An adhesive application assembly is fixedly disposed between the two outer fixing plates. The adhesive application assembly is used to apply adhesive to the corrugated surfaces of the upper and lower paper cores as they pass through. A synchronous displacement component is disposed on the outer wall of the outer fixing plate and is used to control the glue application position of the glue application component to change synchronously with the movement of the paper core pressure plate. A displacement signal generation component, connected to the synchronous displacement component, is used to output the displacement of the two paper core pressure plates to the control unit.

7. The flattening equipment for producing high-strength double-corrugated paper cores according to claim 6, characterized in that: The adhesive coating assembly includes: Two glued fixing end plates are fixedly installed on the inner side of the two outer fixing plates; Two glue-applying rollers are rotatably mounted on the upper and lower sides between the two glue-applying fixed end plates; A displacement groove is formed on the glue-coating fixed end plate so that the end of the glue-coating roller passes through it, and the displacement groove is perpendicular to the paper core pressure plate.

8. The flattening equipment for producing high-strength double-corrugated paper cores according to claim 7, characterized in that: The synchronous displacement component includes: A synchronous moving track is fixedly mounted on the outer end face of the outer fixing plate; A synchronous drive plate is slidably mounted on the synchronous moving track. Both ends of the synchronous drive plate have protrusions extending toward the paper core pressure plate and the glue coating roller. The protrusions are provided with strip grooves. The first synchronous displacement clamp is fixedly installed on the end of the paper core pressure plate and is movably engaged in one of the strip grooves; The second synchronous displacement clamp is fixedly disposed on the outer side of the end of the coating roller and movably engaged in another of the strip grooves.

9. A flattening device for producing and processing high-strength double-corrugated paper cores according to claim 8, characterized in that: The displacement signal generation component includes: An end limiting block is fixedly mounted on the outer fixing plate and located at the end of the synchronous moving track; The telescopic rack has one end fixedly connected to the synchronous drive plate, and the other end can extend telescopically into the inner cavity of the end limiting block and mesh with the gear in the end limiting block; A shaft damping component is fixedly disposed on the side of the end limiting block and connected to the shaft of the gear; A rotary encoder is fixedly mounted on the other end of the end limit block and is drively connected to the shaft of the gear.

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