Automatic three-fold forming device for plastic woven fabric tube and folding method thereof

Abstract

The application discloses a kind of automatic three-fold forming device of plastic braided cloth tube and its folding method, belong to the equipment technical field of packing article or material, including composite folding mechanism, conveying mechanism, pressing mechanism and control unit;Dynamic positioning mechanism is installed on conveying mechanism, dynamic positioning mechanism is set in folding process area on conveying mechanism, conveying mechanism is cooperatively arranged with composite folding mechanism, and pressing mechanism is erected above conveying mechanism and composite folding mechanism;Conveying mechanism is used to convey finished product to folding process area, dynamic positioning mechanism is used to clamp and fix finished product at predetermined folding position, composite folding mechanism is used to fold fixed finished product, and pressing mechanism is used to compact fold mark at folding position;Control unit is electrically connected with conveying mechanism, dynamic positioning mechanism, composite folding mechanism and pressing mechanism respectively.The application realizes automatic positioning, folding and compacting of plastic braided cloth tube, with simple structure, high degree of automation, uniform folding size, and firm fold mark.

Description

Technical Field

[0001] This invention belongs to the technical field of equipment for packaging objects or materials, specifically relating to an automatic three-fold forming device for woven plastic tubes and its folding method, used to fold flat woven plastic tubes into multi-layer square packaging units; it is particularly suitable for positioning, folding and creasing woven plastic tubes in packaging production lines. Background Technology

[0002] Woven plastic tubes are a type of packaging bag. In the production process of finished woven plastic tubes, the unfolded tube typically needs to be folded three times along predetermined fold lines to form an approximately square shape, facilitating subsequent stacking, bundling, or shipping. Currently, this folding process is mostly done manually. Operators sequentially fold the finished woven plastic tube three times, applying pressure at the fold lines with their feet to shape it. However, this manual folding method is not only labor-intensive and inefficient, but also suffers from limitations in the repeatability of manual operations, leading to dimensional deviations in the folded product and inconsistent crease compaction. This negatively impacts the continuity of subsequent automated packaging processes and the quality of the packaged product.

[0003] To address the shortcomings of manual operations, some semi-automatic or fully automatic folding equipment has been put into use. However, in actual operation, these devices still exhibit several common problems. For example, when the woven fabric tube material enters the folding station, lateral or longitudinal positional deviations are prone to occur, resulting in discrepancies between the actual folding line and the preset folding line. In the folding execution stage, simple unidirectional pressure plate or push plate actions are often used, making it difficult to form a regular double-layer or multi-layer stacked structure in a single forming process. In the crease setting stage, there is a lack of structural design to apply differentiated pressing action to different crease positions, causing creases to easily spring back or flatten during subsequent conveying or stacking. In addition, the functional mechanisms in existing equipment are mostly discretely driven and operate independently, with insufficient coordination and work rhythm matching between them, making it difficult to form an efficient, stable, continuous, and automated cyclic operation process.

[0004] Therefore, in the field of machinery and equipment technology for packaging objects or materials, there is an urgent need for an automated folding processing device that can fully adapt to the characteristics of woven plastic tubes, achieve precise positioning, neat folding, reliable crease pressing, and continuous cyclic operation capability. How to complete the automatic three-fold forming of woven plastic tubes through the coordinated operation of a set of mechanical mechanisms, while ensuring consistent fold dimensions and crease stability, is a technical problem that needs further resolution. Summary of the Invention

[0005] The present invention addresses the above-mentioned problems and overcomes the shortcomings of the prior art by providing an automatic three-fold forming device for woven plastic tubes and its folding method.

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

[0007] This invention provides an automatic three-fold forming device for woven plastic tubes, comprising a composite folding mechanism, a conveying mechanism, a pressing mechanism, and a control unit. A dynamic positioning mechanism is installed on the conveying mechanism, which is located in the folding process area. The conveying mechanism cooperates with the composite folding mechanism. The pressing mechanism is positioned above the conveying mechanism and the composite folding mechanism and corresponds to the folding process area. The conveying mechanism transports the finished product to the folding process area. The dynamic positioning mechanism clamps and fixes the transported finished product at a predetermined folding position. The composite folding mechanism folds the fixed finished product. The pressing mechanism presses down the creases at the folded areas. The control unit is electrically connected to the conveying mechanism, the dynamic positioning mechanism, the composite folding mechanism, and the pressing mechanism, and controls the operating status of each mechanism.

[0008] As a preferred embodiment of the present invention, the dynamic positioning mechanism includes at least one pair of positioning swing rods and at least one pair of positioning blocks corresponding to them. The positioning swing rods are swayably disposed above both sides of the folding process area of ​​the conveying mechanism, and the positioning blocks are slewingly disposed within the folding process area of ​​the conveying mechanism and located below the positioning swing rods. The positioning swing rods are configured to swing from a first position parallel to the conveying direction of the finished product to a second position perpendicular to the conveying direction of the finished product and located above the finished product. The positioning blocks are configured to rise to the lower surface of the finished product. When the positioning swing rods to the second position, the positioning blocks rise to the lower surface of the finished product and continue to push the finished product to abut against the positioning swing rods. The positioning blocks and the positioning swing rods work together to clamp and fix the finished product from bottom to top.

[0009] As another preferred embodiment of the present invention, the composite folding mechanism includes a horizontal tie rod, a lifting drive assembly, a horizontal drive assembly, and a first frame. The horizontal drive assembly is disposed on the first frame, the lifting drive assembly is connected to the horizontal drive assembly, and the horizontal tie rod is connected to the lifting drive assembly. The conveying mechanism passes through the space between the horizontal tie rod and the horizontal drive assembly and is mounted on the composite folding mechanism, with the folding process area of ​​the conveying mechanism corresponding to the position of the horizontal drive assembly. The horizontal tie rod is arranged perpendicular to the conveying direction of the finished product. The horizontal tie rod is raised to the lower surface position of the finished product under the drive of the lifting drive assembly to lift the finished product, and then pulled horizontally forward along the conveying direction under the drive of the horizontal drive assembly, so that the finished product forms a first crease at the clamping position of the dynamic positioning mechanism.

[0010] As another preferred embodiment of the present invention, the conveying mechanism is a belt conveyor, which includes a second frame and a drive belt that runs around the second frame; the folding process area of ​​the belt conveyor is provided with a guide plate and a limiting baffle. The guide plate is used to guide the finished product over the horizontal tie rod of the composite folding mechanism; the limiting baffle is telescopically provided on the second frame. When the finished product is conveyed to the limiting baffle by the drive belt, the limiting baffle rises to block the finished product, and the belt conveyor stops running at the same time; a second crease is formed when the horizontal tie rod drives the finished product to the position of the limiting baffle.

[0011] As another preferred embodiment of the present invention, the dynamic positioning mechanism further includes a swing arm drive cylinder and a positioning drive cylinder. The swing arm drive cylinder is symmetrically arranged on the left and right sides of the second frame of the belt conveyor, and is connected to the positioning swing arm to drive the positioning swing arm to swing. The positioning drive cylinder is symmetrically arranged on the inner side of the second frame of the belt conveyor, and is connected to the positioning block to drive the positioning block to rise and fall on the second frame. A baffle drive cylinder is also provided on the second frame, and is connected to the limit baffle to drive the limit baffle to rise and fall on the second frame.

[0012] In another preferred embodiment of the present invention, the horizontal drive assembly includes a servo motor, a synchronous shaft, a synchronous pulley set, a linear guide rail, and a synchronous belt. Two synchronous shafts are mounted parallel to each other on the first frame, and the two synchronous shafts are arranged perpendicular to the product conveying direction. The synchronous pulley set is respectively installed at the ends of the two synchronous shafts. One of the synchronous shafts is connected to the power output end of the servo motor. The synchronous belt is connected between the synchronous pulleys on the same side of the two synchronous shafts. The linear guide rail is arranged parallel to the product conveying direction on the first frame next to the synchronous belt. The lifting drive assembly is connected to the synchronous belt and the linear guide rail respectively. The servo motor drives the horizontal tie rod to move synchronously horizontally along the linear guide rail through the synchronous shaft, the synchronous pulley set, and the synchronous belt. The lifting drive assembly consists of two tie rod drive cylinders symmetrically arranged on the first frame, and the two ends of the horizontal tie rod are correspondingly connected to the two tie rod drive cylinders.

[0013] As another preferred embodiment of the present invention, the pressing mechanism includes a third frame, a first pressing plate, and a second pressing plate. The first pressing plate is mounted on the third frame in a height-adjustable manner corresponding to the first crease position, and the second pressing plate is mounted on the third frame in a height-adjustable manner corresponding to the second crease position. After the composite folding mechanism completes the folding action, the first pressing plate and the second pressing plate press the first crease and the second crease sequentially or simultaneously.

[0014] As another preferred embodiment of the present invention, the pressing mechanism further includes a first pressing plate cylinder and a second pressing plate cylinder mounted on the third frame. The first pressing plate cylinder is connected to the first pressing plate, and the second pressing plate cylinder is connected to the second pressing plate. The first pressing plate cylinder and the second pressing plate cylinder are controlled by the control unit, so that the first pressing plate is pressed down after the dynamic positioning mechanism releases the clamp, and the second pressing plate is pressed down when the horizontal pull rod of the composite folding mechanism returns to the middle part between the first crease and the second crease and pauses to wait.

[0015] As another preferred embodiment of the present invention, after the pressing mechanism completes the pressing action, the control unit controls the dynamic positioning mechanism to release the clamp, the horizontal tie rod of the composite folding mechanism to retract horizontally and descend to the initial position, and the first pressure plate and the second pressure plate of the pressing mechanism to rise and reset.

[0016] In addition, the present invention also provides a folding method for an automatic three-fold forming device for woven plastic tubes, which is implemented using the aforementioned automatic three-fold forming device for woven plastic tubes, and includes the following steps:

[0017] S1. Positioning step: The control unit controls the conveying mechanism to transport the finished product to the dynamic positioning mechanism, and controls the dynamic positioning mechanism to clamp and fix the finished product from top to bottom at the predetermined folding position.

[0018] S2, Folding Step: The control unit controls the horizontal pull rod of the composite folding mechanism to rise to lift the clamped finished product; the control unit controls the horizontal drive component to drive the horizontal pull rod to pull it horizontally forward along the conveying direction, so that the finished product forms a first crease at the clamping position of the dynamic positioning mechanism, and forms a second crease when the horizontal pull rod drives the finished product to the position of the limit baffle.

[0019] S3, Pressing and Resetting Steps: The control unit controls the pressing mechanism to press the first crease and the second crease, controls the dynamic positioning mechanism to release the clamp, controls the horizontal pull rod of the composite folding mechanism to retract horizontally and lower to reset, and controls the pressing mechanism to reset.

[0020] S4. Output Step: The folded and compacted finished product is output by controlling the conveying mechanism through the control unit.

[0021] Beneficial effects of this invention:

[0022] This invention provides an automatic three-fold forming device and folding method for woven plastic tubes. Through a structural design combining an automated folding system mainly composed of a dynamic positioning mechanism, a composite folding mechanism, and a pressing mechanism with a conveying mechanism and a control unit, it achieves automatic positioning, folding, and compaction of the woven plastic tubes, effectively solving the problems existing in the prior art. This invention features a simple structure, high degree of automation, uniform folding dimensions, and strong creases, creating favorable conditions for automated production in subsequent packaging processes. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of an automatic three-fold forming device for a plastic woven fabric tube according to the present invention.

[0025] Figure 2 This is a schematic diagram of the connection between the limiting baffle and the baffle driving cylinder of the automatic three-fold forming device for plastic woven fabric tubes according to the present invention.

[0026] Figure 3 This is a schematic diagram of the connection between the positioning block and the positioning drive cylinder in the automatic three-fold forming device for woven plastic tubes according to the present invention.

[0027] Figure 4 This is a schematic diagram of the structure of an automatic three-fold forming device for woven plastic tubes according to the present invention. The positioning swing rod swings to a second position perpendicular to the conveying direction of the finished product and cooperates with the positioning block to clamp and position the finished product.

[0028] Figure 5 This is a schematic diagram of the composite folding mechanism of the automatic three-fold forming device for plastic woven fabric tubes of the present invention, which completes the three-folding of the finished product.

[0029] The markings in the diagram are as follows: 1 is the belt conveyor, 2 is the guide plate, 3 is the limit baffle, 4 is the baffle drive cylinder, 5 is the positioning swing rod, 6 is the swing rod drive cylinder, 7 is the positioning block, 8 is the positioning drive cylinder, 9 is the horizontal tie rod, 10 is the tie rod drive cylinder, 11 is the linear guide rail, 12 is the synchronous belt, 13 is the synchronous shaft, 14 is the servo motor, 15 is the first pressure plate, 16 is the first pressure plate drive cylinder, 17 is the second pressure plate, 18 is the second pressure plate drive cylinder, 19 is the finished product, 20 is the conveying mechanism, 21 is the pressing mechanism, 22 is the composite folding mechanism, 23 is the first frame, 24 is the second frame, 25 is the third frame, and 26 is the synchronous belt pulley set. Detailed Implementation

[0030] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] like Figures 1 to 5As shown in the figure, an automatic three-fold forming device for woven plastic tubes provided in this embodiment of the invention includes a composite folding mechanism 22, a conveying mechanism 20, a pressing mechanism 21, and a control unit. A dynamic positioning mechanism is installed on the conveying mechanism 20, and the dynamic positioning mechanism is disposed in the folding process area on the conveying mechanism 20. The conveying mechanism 20 and the composite folding mechanism 22 are configured to cooperate. The pressing mechanism 21 is mounted above the conveying mechanism 20 and the composite folding mechanism 22 and corresponds to the folding process area. The conveying mechanism 20 is used to convey the finished product 19 to the folding process area. The dynamic positioning mechanism is used to clamp and fix the conveyed finished product 19 at a predetermined folding position. The composite folding mechanism 22 is used to fold the fixed finished product 19. The pressing mechanism 21 is used to press the creases at the folded areas. The control unit is electrically connected to the conveying mechanism 20, the dynamic positioning mechanism, the composite folding mechanism 22, and the pressing mechanism 21, respectively. The control unit is used to control the operating status of the conveying mechanism 20, the dynamic positioning mechanism, the composite folding mechanism 22, and the pressing mechanism 21, respectively. In this embodiment, the control unit can be a programmable logic controller (PLC) to achieve precise control of the timing of each mechanism's actions, ensuring the stability and reliability of the coordinated actions of each mechanism.

[0032] The conveying mechanism 20 is a belt conveyor 1, which includes a second frame 24 and a drive belt that runs around the second frame 24. The folding process area of ​​the belt conveyor 1 is equipped with a guide plate 2 and a limiting baffle 3. The guide plate 2 guides the finished product 19 over the horizontal tie rod 9 of the composite folding mechanism 22, preventing interference between the finished product 19 and the horizontal tie rod 9 during conveying and ensuring smooth conveying. The limiting baffle 3 is retractably mounted on the second frame 24. When the finished product 19 is conveyed to the limiting baffle 3 by the drive belt, the limiting baffle 3 rises to block the finished product 19, and the belt conveyor 1 stops running. To accurately detect the arrival status of the finished product 19, a proximity sensor (not shown in the figure) is installed near the limiting baffle 3 on the second frame 24. The proximity sensor is electrically connected to the control unit. When the finished product 19 is conveyed by the drive belt to the detection range of the proximity sensor, the proximity sensor generates a detection signal and sends it to the control unit. Upon receiving the signal, the control unit controls the baffle drive cylinder 4 to actuate, driving the limit baffle 3 to rise and block the finished product 19, while simultaneously controlling the belt conveyor 1 to stop running. By setting up the proximity sensor, the detection of the finished product 19's arrival is automated, improving positioning accuracy and response speed, and avoiding positioning deviation problems caused by excessive or insufficient conveying.

[0033] The dynamic positioning mechanism includes at least one pair of positioning swing rods 5 and at least one pair of corresponding positioning blocks 7. The positioning swing rods 5 are swayably positioned above both sides of the folding process area of ​​the belt conveyor 1, and the positioning blocks 7 are vertically and vertically positioned within the folding process area of ​​the belt conveyor 1 and below the positioning swing rods 5. The positioning swing rods 5 are configured to swing from a first position parallel to the conveying direction of the finished product 19 to a second position perpendicular to the conveying direction of the finished product 19 and above the finished product 19. The positioning blocks 7 are configured to rise to the lower surface of the finished product 19. When the positioning swing rods 5 swing to the second position, the positioning blocks 7 rise to the lower surface of the finished product 19 and continue to push the finished product 19 to abut against the positioning swing rods 5. The positioning blocks 7 and the positioning swing rods 5 work together to clamp and fix the finished product 19 from bottom to top. This bottom-to-top clamping and positioning method uses the upward force of the positioning blocks 7 to push the finished product 19 upward and tightly fit it against the positioning swing rods 5, effectively overcoming the problem of inaccurate positioning caused by the sag of the plastic woven fabric tube due to its own weight, and ensuring the accuracy and consistency of the folding position.

[0034] The dynamic positioning mechanism also includes a swing arm drive cylinder 6 and a positioning drive cylinder 8. The swing arm drive cylinder 6 is symmetrically arranged on the left and right sides of the second frame 24 of the belt conveyor 1, and is connected to the positioning swing arm 5 to drive the positioning swing arm 5 to swing. The positioning drive cylinder 8 is symmetrically arranged inside the second frame 24 of the belt conveyor 1, and is connected to the positioning block 7 to drive the positioning block 7 to move up and down on the second frame 24. A baffle drive cylinder 4 is also provided on the second frame 24, and is connected to the limit baffle 3 to drive the limit baffle 3 to move up and down on the second frame 24. By driving each actuator with cylinders, it has the advantages of fast response speed, reliable operation, and convenient maintenance, and is suitable for continuous production environments in industrial sites.

[0035] The composite folding mechanism 22 includes a horizontal tie rod 9, a lifting drive assembly, a horizontal drive assembly, and a first frame 23. The horizontal drive assembly is mounted on the first frame 23, the lifting drive assembly is connected to the horizontal drive assembly, and the horizontal tie rod 9 is connected to the lifting drive assembly. The conveying mechanism 20 passes through the space between the horizontal tie rod 9 and the horizontal drive assembly and is mounted on the composite folding mechanism 22. The folding process area of ​​the conveying mechanism 20 corresponds to the position of the horizontal drive assembly. The horizontal tie rod 9 is arranged perpendicular to the conveying direction of the finished product 19. Driven by the lifting drive assembly, the horizontal tie rod 9 rises to the lower surface of the finished product 19 to lift it. Then, driven by the horizontal drive assembly, it is pulled horizontally forward along the conveying direction, causing the finished product 19 to form a first crease at the clamping position of the dynamic positioning mechanism. A second crease is formed when the horizontal tie rod 9 drives the finished product 19 to the position of the limiting baffle 3. This composite folding method of first lifting and then pulling forward ensures that the finished product 19 remains flat during the folding process, avoiding the wrinkles and deviations that are easily caused by traditional pressing folding. The resulting creases are clear and neat, creating favorable conditions for the subsequent compaction process.

[0036] The horizontal drive assembly includes a servo motor 14, synchronous shafts 13, synchronous pulley sets 26, a linear guide rail 11, and a synchronous belt 12. Two synchronous shafts 13 are mounted parallel to each other on the first frame 23, perpendicular to the conveying direction of the finished product 19. Synchronous pulley sets 26 are respectively installed at the ends of the two synchronous shafts 13. One synchronous shaft 13 is connected to the power output end of the servo motor 14. The synchronous belt 12 connects the synchronous pulley sets 26 on the same side of the two synchronous shafts 13. The linear guide rail 11 is parallel to the conveying direction of the finished product 19 and is mounted on the first frame 23 to the side of the synchronous belt 12. The lifting drive assembly is connected to the synchronous belt 12 and the linear guide rail 11. The servo motor 14 drives the horizontal tie rod 9 to move synchronously horizontally along the linear guide rail 11 via the synchronous shafts 13, synchronous pulley sets 26, and synchronous belt 12. The lifting drive assembly consists of two symmetrically arranged lever drive cylinders 10 on the first frame 23, with the two ends of the horizontal lever 9 correspondingly connected to the two lever drive cylinders 10. A servo motor combined with synchronous belt drive is used for horizontal drive, achieving precise position control and uniform speed movement of the horizontal lever 9, ensuring the accuracy and consistency of the two folding positions. Simultaneously, the synchronous shaft 13 ensures that the two ends of the horizontal lever 9 move synchronously, avoiding the problem of the finished product 19 being skewed due to asynchrony between the two ends.

[0037] The pressing mechanism 21 includes a third frame 25, a first pressing plate 15, and a second pressing plate 17. The first pressing plate 15 is vertically mounted on the third frame 25 corresponding to the first crease position, and the second pressing plate 17 is vertically mounted on the third frame 25 corresponding to the second crease position. After the composite folding mechanism 22 completes the folding action, the first pressing plate 15 and the second pressing plate 17 sequentially or simultaneously press the first crease and the second crease. By setting two independent pressing plates to press the two creases respectively, it is ensured that each crease is fully pressed, the creases are firm and not easy to spring back, and the folded finished product 19 maintains good shape stability, which is convenient for subsequent packaging and stacking.

[0038] The pressing mechanism 21 also includes a first pressing plate drive cylinder 16 and a second pressing plate drive cylinder 18 mounted on the third frame 25. The first pressing plate drive cylinder 16 is connected to the first pressing plate 15, and the second pressing plate drive cylinder 18 is connected to the second pressing plate 17. The first pressing plate drive cylinder 16 and the second pressing plate drive cylinder 18 are controlled by a control unit, so that the first pressing plate 15 is pressed down after the dynamic positioning mechanism releases the clamp, and the second pressing plate 17 is pressed down when the horizontal pull rod 9 of the composite folding mechanism 22 returns to the middle part between the first crease and the second crease and pauses to wait. This sequential pressing control method ensures that the pressing action and the folding action are closely connected, which not only ensures the pressing effect but also shortens the time of a single work cycle and improves the overall production efficiency of the machine.

[0039] After the pressing mechanism 21 completes the compaction action, the control unit controls the dynamic positioning mechanism to release the clamp, the horizontal tie rod 9 of the composite folding mechanism 22 to retract horizontally and descend to its initial position, and the first pressure plate 15 and the second pressure plate 17 of the pressing mechanism 21 to rise and reset. Each mechanism automatically resets according to a preset sequence, preparing for the next work cycle, realizing continuous automated operation, greatly improving production efficiency and reducing manual labor intensity.

[0040] In addition, the present invention also provides a folding method for an automatic three-fold forming device for woven plastic tubes, which is implemented using the aforementioned automatic three-fold forming device for woven plastic tubes, and includes the following steps:

[0041] S1. Positioning Step: The control unit controls the conveying mechanism 20 to transport the finished product 19 to the dynamic positioning mechanism, and controls the dynamic positioning mechanism to clamp and fix the finished product 19 from top to bottom at a predetermined folding position. Specifically, when the finished product 19 is conveyed by the drive belt to the detection range of the proximity sensor, the proximity sensor sends a signal to the control unit. The control unit controls the baffle drive cylinder 4 to rise the limit baffle 3 to block the finished product 19, and at the same time controls the belt conveyor 1 to stop running. Subsequently, the positioning swing rod 5 swings from a first position parallel to the conveying direction to a second position perpendicular to the conveying direction and above the finished product 19. The positioning block 7 rises to the lower surface of the finished product 19 and continues to push the finished product 19 to abut against the positioning swing rod 5. The positioning block 7 and the positioning swing rod 5 work together to clamp and fix the finished product 19 from bottom to top.

[0042] S2, Folding Step: The control unit controls the horizontal pull rod 9 of the composite folding mechanism 22 to rise to lift the clamped finished product 19; the control unit controls the horizontal drive assembly to drive the horizontal pull rod 9 to pull horizontally forward along the conveying direction, so that the finished product 19 forms a first crease at the clamping position of the dynamic positioning mechanism, and forms a second crease when the horizontal pull rod 9 drives the finished product 19 to the position of the limit baffle 3.

[0043] S3. Pressing and Resetting Steps: The control unit controls the pressing mechanism 21 to press the first crease and the second crease, controls the dynamic positioning mechanism to release the clamp, controls the horizontal pull rod 9 of the composite folding mechanism 22 to retract horizontally and lower to reset, and controls the pressing mechanism 21 to reset. Specifically, the second pressure plate 17 presses down to press the second crease when the horizontal pull rod 9 of the composite folding mechanism 22 returns to the middle part of the first crease and the second crease and pauses to wait, and the first pressure plate 15 presses down to press the first crease after the dynamic positioning mechanism releases the clamp.

[0044] S4. Output Step: The folded and compacted finished product 19 is output by controlling the conveying mechanism 20 through the control unit.

[0045] Using the above method, the entire process of automatic positioning, folding, and compaction of woven plastic tubes is automated. The folding size is uniform, the creases are firm and reliable, the single work cycle time is short, and the production efficiency is significantly improved, creating favorable conditions for subsequent packaging processes.

[0046] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. An automatic three-fold forming device for woven plastic tubes, characterized in that: The system includes a composite folding mechanism, a conveying mechanism, a pressing mechanism, and a control unit. A dynamic positioning mechanism is mounted on the conveying mechanism and is located in the folding process area. The conveying mechanism cooperates with the composite folding mechanism. The pressing mechanism is positioned above the conveying mechanism and the composite folding mechanism and corresponds to the folding process area. The conveying mechanism transports the finished product to the folding process area. The dynamic positioning mechanism clamps and fixes the transported finished product at a predetermined folding position. The composite folding mechanism folds the fixed finished product. The pressing mechanism presses down the creases at the folded areas. The control unit is electrically connected to the conveying mechanism, the dynamic positioning mechanism, the composite folding mechanism, and the pressing mechanism, and controls the operating status of each mechanism. The dynamic positioning mechanism includes at least one pair of positioning swing rods and at least one pair of corresponding positioning blocks. The positioning swing rods are swayably disposed above both sides of the folding process area of ​​the conveying mechanism, and the positioning blocks are slewingly disposed within the folding process area of ​​the conveying mechanism and located below the positioning swing rods. The positioning swing rods are configured to swing from a first position parallel to the conveying direction of the finished product to a second position perpendicular to the conveying direction of the finished product and located above the finished product. The positioning blocks are configured to rise to the lower surface of the finished product. When the positioning swing rod swings to the second position, the positioning blocks rise to the lower surface of the finished product and continue to push the finished product to abut against the positioning swing rod. The positioning blocks and the positioning swing rods work together to clamp and fix the finished product from bottom to top. The composite folding mechanism includes a horizontal tie rod, a lifting drive assembly, a horizontal drive assembly, and a first frame. The horizontal drive assembly is mounted on the first frame, the lifting drive assembly is connected to the horizontal drive assembly, and the horizontal tie rod is connected to the lifting drive assembly. The conveying mechanism passes through the space between the horizontal tie rod and the horizontal drive assembly and is mounted on the composite folding mechanism. The folding process area of ​​the conveying mechanism corresponds to the position of the horizontal drive assembly. The horizontal tie rod is arranged perpendicular to the conveying direction of the finished product. The horizontal tie rod rises to the lower surface of the finished product under the drive of the lifting drive assembly to lift the finished product. Then, under the drive of the horizontal drive assembly, it is pulled horizontally forward along the conveying direction, so that the finished product forms a first crease at the clamping position of the dynamic positioning mechanism. The dynamic positioning mechanism further includes a swing arm drive cylinder and a positioning drive cylinder. The swing arm drive cylinder is symmetrically arranged on the left and right sides of the second frame of the belt conveyor, and is connected to the positioning swing arm to drive the positioning swing arm to swing. The positioning drive cylinder is symmetrically arranged on the inner side of the second frame of the belt conveyor, and is connected to the positioning block to drive the positioning block to rise and fall on the second frame. A baffle drive cylinder is also provided on the second frame, and is connected to the limit baffle to drive the limit baffle to rise and fall on the second frame.

2. The automatic three-fold forming device for woven plastic tubes according to claim 1, characterized in that: The conveying mechanism is a belt conveyor, which includes a second frame and a drive belt that runs around the second frame. The folding process area of ​​the belt conveyor is equipped with a guide plate and a limiting baffle. The guide plate is used to guide the finished product over the horizontal tie rod of the composite folding mechanism. The limiting baffle is telescopically mounted on the second frame. When the finished product is conveyed to the limiting baffle by the drive belt, the limiting baffle rises to block the finished product, and the belt conveyor stops running. A second crease is formed when the horizontal tie rod drives the finished product to the position of the limiting baffle.

3. The automatic three-fold forming device for woven plastic tubes according to claim 1, characterized in that: The horizontal drive assembly includes a servo motor, synchronous shafts, synchronous pulley sets, linear guide rails, and a synchronous belt. Two synchronous shafts are mounted parallel to each other on the first frame, perpendicular to the product conveying direction. Synchronous pulley sets are respectively installed at the ends of the two synchronous shafts. One of the synchronous shafts is connected to the power output end of the servo motor. The synchronous belt is connected between the synchronous pulleys on the same side of the two synchronous shafts. The linear guide rail is set parallel to the product conveying direction on the first frame next to the synchronous belt. The lifting drive assembly is connected to the synchronous belt and the linear guide rail respectively. The servo motor drives the horizontal tie rod to move synchronously horizontally along the linear guide rail through the synchronous shafts, synchronous pulley sets, and synchronous belt. The lifting drive assembly consists of two symmetrically arranged tie rod drive cylinders on the first frame, with the two ends of the horizontal tie rod correspondingly connected to the two tie rod drive cylinders.

4. The automatic three-fold forming device for woven plastic tubes according to claim 1, characterized in that: The pressing mechanism includes a third frame, a first pressure plate, and a second pressure plate. The first pressure plate is mounted on the third frame in a liftable manner corresponding to the first crease position, and the second pressure plate is mounted on the third frame in a liftable manner corresponding to the second crease position. After the composite folding mechanism completes the folding action, the first pressure plate and the second pressure plate press the first crease and the second crease sequentially or simultaneously.

5. The automatic three-fold forming device for woven plastic tubes according to claim 4, characterized in that: The pressing mechanism also includes a first pressing plate cylinder and a second pressing plate cylinder mounted on the third frame. The first pressing plate cylinder is connected to the first pressing plate, and the second pressing plate cylinder is connected to the second pressing plate. The first pressing plate cylinder and the second pressing plate cylinder are controlled by the control unit, so that the first pressing plate is pressed down after the dynamic positioning mechanism releases the clamp, and the second pressing plate is pressed down when the horizontal pull rod of the composite folding mechanism returns to the middle part between the first crease and the second crease and pauses to wait.

6. The automatic three-fold forming device for woven plastic tubes according to claim 4, characterized in that: After the pressing mechanism completes the pressing action, the control unit controls the dynamic positioning mechanism to release the clamp, the horizontal tie rod of the composite folding mechanism to retract horizontally and descend to the initial position, and the first and second pressure plates of the pressing mechanism to rise and reset.

7. A folding method for an automatic three-fold forming device for woven plastic tubes, characterized in that: The automatic three-fold forming device for woven plastic tubes as described in any one of claims 1 to 6 is used, comprising the following steps: S1. Positioning step: The control unit controls the conveying mechanism to transport the finished product to the dynamic positioning mechanism, and controls the dynamic positioning mechanism to clamp and fix the finished product from top to bottom at the predetermined folding position. S2, Folding Step: The control unit controls the horizontal pull rod of the composite folding mechanism to rise to lift the clamped finished product; the control unit controls the horizontal drive component to drive the horizontal pull rod to pull it horizontally forward along the conveying direction, so that the finished product forms a first crease at the clamping position of the dynamic positioning mechanism, and forms a second crease when the horizontal pull rod drives the finished product to the position of the limit baffle. S3, Pressing and Resetting Steps: The control unit controls the pressing mechanism to press the first crease and the second crease, controls the dynamic positioning mechanism to release the clamp, controls the horizontal pull rod of the composite folding mechanism to retract horizontally and lower to reset, and controls the pressing mechanism to reset. S4. Output Step: The folded and compacted finished product is output by controlling the conveying mechanism through the control unit.

Images