Automatic identification and adjustment device for plastic woven bag wrinkles

Abstract

This invention relates to the field of plastic woven bag production equipment technology, and discloses an automatic identification and adjustment device for plastic woven bags with wrinkles, solving the problem of poor adjustment effect. It includes a conveying mechanism, an adsorption mechanism, an adjustment mechanism, and an identification mechanism. The conveying mechanism is used to convey woven bags with inner membranes. The adsorption mechanism includes symmetrically arranged sponge suction cups that can actively open the bag opening before operation, allowing the inner membrane to be in a free and relaxed state. The adjustment mechanism includes an integrated air blowing component that can move laterally and has adjustable tilt angle and air outlet direction, integrating a correction nozzle and a flat tangential air nozzle. The identification mechanism includes symmetrically arranged diffuse reflection photoelectric sensors for identifying the position and defect status of the woven bag. This invention solves the problems of poor inner membrane correction effect, easy damage to the inner membrane, and ineffective wrinkle removal in the prior art, and is suitable for the automated production of woven bags with inner membranes of various specifications.

Description

Technical Field

[0001] This invention belongs to the technical field of plastic woven bag production equipment, specifically an automatic recognition and adjustment device for plastic woven bag pleats. Background Technology

[0002] Woven plastic bags with inner linings are the primary packaging material for industries such as chemicals, grains, feed, and building materials. Their production process typically includes weaving, coating, applying the inner lining, and heat sealing. With the rapid development of industrial automation, woven bag production lines have gradually achieved continuous and automated operations, leading to increasingly higher demands for production efficiency and product quality. Among these, the inner lining correction and wrinkle removal after the inner lining process are crucial steps affecting the subsequent heat sealing quality and product appearance, directly impacting the packaging's airtightness and safety.

[0003] In existing technologies, the correction and wrinkle removal of the inner film of woven bags mostly use fixed-position air nozzles, directly blowing air into the bag while it is naturally collapsed. Because the inner film and outer bag are tightly bonded after the outer bag collapses, there is significant friction between them. Weak airflow cannot effectively push the inner film to correct its alignment, while increasing the airflow pressure easily tears the ultra-thin PE inner film, which is only 0.02-0.05mm thick, leading to product scrap. Furthermore, the fixed position of the air nozzles in existing devices only allows blowing air into a localized area at the bag opening, failing to effectively remove wrinkles within the bag's layers. Residual wrinkles can cause problems such as incomplete welding and leaks during heat sealing, and in severe cases, material leakage. In addition, existing devices cannot adapt to woven bags of different sizes and specifications. Changing product specifications requires manual adjustment of the air nozzle position, a cumbersome process with low automation, hindering the overall efficiency of the production line. Therefore, this invention proposes an automatic wrinkle recognition and adjustment device for plastic woven bags to solve the above problems. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides an automatic recognition and adjustment device for pleats in plastic woven bags, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic identification and adjustment device for pleats in plastic woven bags, comprising a conveying mechanism, an adsorption mechanism at the top of the conveying mechanism, an adjustment mechanism on the outside of the adsorption mechanism, and identification mechanisms at both ends of the adsorption mechanism; The conveying mechanism includes a fold recognition and adjustment frame, and several adjustment frame conveyor belts are rotatably connected inside the fold recognition and adjustment frame via rollers; The top of the wrinkle recognition adjustment frame is fixedly connected to several positioning frames of the adjustment mechanism. Each positioning frame has a moving block at its bottom. Each moving block is hinged to an angle adjustment block. A connecting rod is fixed inside each angle adjustment block. Each of the connecting rods is provided with a correction nozzle on its inner side, each correction nozzle is provided with a flat tangential air nozzle at its end, each correction nozzle is fixed with a correction solenoid valve on its outer side, and each flat tangential air nozzle is fixed with a flat tangential air nozzle solenoid valve on its outer side. The top of the positioning frame is fixedly connected to several fixed plates of the identification mechanism, and several diffuse reflection photoelectric sensors are fixed at the bottom of each fixed plate; This device also includes a control unit; The diffuse reflection photoelectric sensor collects the real-time position information of the woven bag, and transmits the signal to the control unit after conversion and timing matching. The diffuse reflection photoelectric sensor emits and receives diffuse reflection infrared light. Based on the difference in the intensity of the reflected light signal, it helps to determine the inner membrane offset state and the woven bag wrinkle defect, and uploads the detection signal to the control unit. After receiving the data, the control unit first controls the correction solenoid valve to operate, causing the correction nozzle to output pulsed airflow to complete the inner membrane correction operation. After the correction is completed, the control unit drives the solenoid valve of the flat tangential air nozzle to open and close, controls the flat tangential air nozzle to spray air, discharges the trapped air in the interlayer between the woven bag and the inner membrane, and smooths out the wrinkles in the interlayer.

[0006] Preferably, the conveying mechanism further includes an end conveyor frame, the top of which is detachably connected to a controller, the control unit being located inside the controller, and a plurality of end conveyor belts being rotatably connected inside the end conveyor frame via rollers; The conveying structure also includes an end conveyor frame, with an end positioning frame fixed to the top of the end conveyor frame, and several end conveyor belts rotatably connected inside the end conveyor frame via rollers; The side walls of the end conveyor, the end conveyor, and the fold recognition and adjustment frame are all detachably connected to a box door, and the bottoms of the end conveyor, the end conveyor, and the fold recognition and adjustment frame are all detachably connected to several support legs.

[0007] Preferably, the bottom of the end positioning frame is detachably connected to two slide rails, each slide rail is provided with a slide groove, and a plurality of sliders are slidably connected inside each slide groove, and a bolt is engaged inside each slider; Each slider is externally slidably connected to a connecting frame, and a nut is tightly fitted to the outside of each connecting frame. Each bolt is engaged with the nut on its outside. Each of the connecting frames at both ends is hinged to a main moving wheel at its bottom, and the remaining connecting frames are hinged to a balance moving wheel at their bottom.

[0008] Preferably, both the end positioning frame and the end conveying frame are fixed to the inner side of their top ends, each fixed frame has a positioning shaft hinged inside, each positioning shaft has at least two positioning plates hinged on it, and each positioning plate has a moving auxiliary wheel hinged to its bottom.

[0009] Preferably, the wrinkle recognition adjustment frame has several bottom sponge suction cups detachably connected inside. The bottom of the several bottom sponge suction cups is fixedly connected through bottom suction cup air supply pipes. Each bottom sponge suction cup is provided with a bottom suction cup solenoid valve and fixedly connected to the bottom suction cup air supply pipe. Each bottom suction cup air supply pipe is fixedly equipped with a bottom suction cup air pump.

[0010] Preferably, each of the bottom sponge suction cups is provided with a top sponge suction cup, each of the top sponge suction cups is fixed with a top connecting frame, a plurality of the top connecting frames are fixed with a connecting plate, a plurality of connecting plate positioning shafts are fixed with a plurality of connecting plate positioning shafts, and a positioning rod is slidably connected to the top of the plurality of connecting plate positioning shafts, and the positioning rod is detachably connected to the positioning frame; A lifting rod is fixed to the top of the connecting plate, and the other end of the lifting rod is fixedly connected to the positioning rod. The bottom of the connecting plate is also fixed with a top suction cup air pump, the bottom of the top suction cup air pump is fixed with a top air supply pipe, two top suction cup solenoid valves are fixed on the top air supply pipe, and the end of the top air supply pipe is fixedly connected to the top sponge suction cup.

[0011] Preferably, each positioning frame is provided with a positioning frame slide groove, a lifting slider is slidably connected inside each positioning frame slide groove, an adjusting frame lifting rod is fixed to the top of each lifting slider, and the top of each adjusting frame lifting rod is fixedly connected to the top wall of the positioning frame; Each of the lifting sliders has a movable screw hinged inside, and a rotation timer is fixed at the end of each movable screw. A movable motor is fixed inside each of the lifting sliders, and the output shaft of each movable motor is fixedly connected to the movable screw at one end. Each movable screw is engaged with the movable block outside.

[0012] Preferably, each of the moving blocks is fixed with a tilt adjustment motor at its end, the output shaft of each tilt adjustment motor is fixedly connected to the tilt adjustment block at one end, and a tilt adjustment block angle sensor is fixed outside the output shaft of each tilt adjustment motor; Each of the connecting rods is internally hinged with a reversing block, each of the end reversing blocks is fixedly connected to the correction nozzle on its inner side, and each of the end reversing blocks is fixedly connected to the flat tangential air nozzle on its inner side. At least two commutator motors are fixedly connected to the top of each connecting rod, the output shaft of each commutator motor is fixedly connected to the commutator block at its bottom, and an output shaft angle sensor of each commutator motor is fixedly attached to the outside of the output shaft of each commutator motor.

[0013] Preferably, one end of the wrinkle recognition adjustment frame is provided with an air compressor, an air pump is fixed on the top of the air compressor, a main valve is fixed on the top of the air pump, a delivery pipe is fixed on the top of the main valve, and the delivery pipe is detachably connected to the positioning rod through a positioning clamp; Positioning clips are detachably connected to both ends of the delivery pipe. One end of each positioning clip is detachably connected to the correction solenoid valve, and the other end of each positioning clip is detachably connected to the flat tangential air nozzle solenoid valve.

[0014] The present invention also provides a method for using the automatic recognition and adjustment device for pleats in plastic woven bags, which includes the following steps: Step 1: Install the entire device and perform a self-inspection. Then, place the inner film into the woven bag through the film-wrapping device upstream of the end conveyor and convey it to the end conveyor belt. The end conveyor belt moves the woven bag to the top of the pleat recognition and adjustment frame. Step 2: Start the adjusting frame conveyor belt so that the woven bag can move with the adjusting frame conveyor belt. At this time, the moving auxiliary wheel will initially flatten the woven bag. At this time, the diffuse reflection photoelectric sensor will collect the woven bag's movement position information in real time and transmit the information to the control unit. At the same time, the diffuse reflection photoelectric sensor will help to judge the inner film offset state and the woven bag wrinkle defects based on the difference in the intensity of the reflected light signal. When the control unit inside the controller controls the adjusting frame conveyor belt to stop working, if the diffuse reflection photoelectric sensor does not identify the inner film offset and wrinkle defects, the control unit will not perform the air blowing operation, but will directly drive the adjusting frame conveyor belt to continue rotating and transport the woven bag to the end conveyor belt. Step 3: The control unit drives the bottom suction cup air pump and the bottom suction cup solenoid valve to work together, so that the bottom sponge suction cup can be attached to the bottom of the woven bag. At the same time, the control unit drives the lifting rod to extend, so that the connecting plate is lowered, and the top sponge suction cup is close to the top of the woven bag. At this time, the control unit controls the top suction cup air pump and the top suction cup solenoid valve to work together, so that the top sponge suction cup can be attached to the top of the woven bag. The control unit further drives the lifting rod to retract a certain length, so that the top sponge suction cup and the bottom sponge suction cup can open up the woven bag. Step 4: The control unit controls the extension of the lifting rod according to the extension amount of the lifting rod, so that the lifting slider descends to the middle of the space opened by the woven bag; Step 5: If a misalignment is detected between the inner membrane and the woven bag, the control unit controls the moving motor to rotate the moving screw according to the misalignment position, driving the moving block to the opposite side of the exposed inner membrane. The control unit drives the tilt adjustment motor to change the tilt angle of the tilt adjustment block, so that the orientation of the correction nozzle is perpendicular to the exposed inner membrane. At this time, the air inside the air compressor is delivered to the positioning clamp through the air pump and the main valve. The correction solenoid valve is activated to make the correction nozzle output pulse airflow, which impacts the inner membrane at a fixed frequency, causing the inner membrane to deviate and completing the inner membrane correction operation. Step 6: After completing the correction, drive the moving screw to move, and at the same time close the correction solenoid valve, so that the flat tangential air nozzle solenoid valve is activated. At this time, the flat tangential air nozzle blows air between the inner membrane and the woven bag, blowing out the gas between the woven bag and the inner membrane, and completing the wrinkle removal work. Step 7: After the correction and wrinkle smoothing are completed, the control unit drives the adjustment frame conveyor belt to continue rotating and transports the bag to the end conveyor belt. The end conveyor belt transports the woven bag to the next station. The balancing moving wheel and the main moving wheel can compact the woven bag and the inner film, while ensuring the stability of the woven bag movement.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) This device actively opens the woven bag opening before correction by using sponge suction cups arranged symmetrically on the top and bottom, so that the inner film and the outer bag are separated and in a free and relaxed state, which completely eliminates the friction between the inner film and the outer bag. Only a low-pressure pulse airflow is needed to easily push the offset or overflowing inner film back to its original position, avoiding damage to the ultra-thin inner film by strong airflow, while ensuring the accuracy of correction. The flat tangential air nozzle outputs continuous laminar airflow. With the bag opening kept open, the airflow can smoothly enter the interlayer between the inner and outer bags and flow along the axial direction of the bag body, evenly discharging the stagnant air in the interlayer, so that the inner film is flat and adhered to the inner wall of the outer bag. This not only removes the wrinkles at the bag opening, but also effectively eliminates the wrinkles in the middle of the bag body, thereby ensuring the adjustment effect and fundamentally solving the problem of poor heat sealing caused by wrinkles. (2) The air blowing component of this device can move laterally along the bag opening by moving the screw. With the tilt adjustment motor to adjust the pitch angle and the reversing motor to adjust the air outlet direction, it can accurately target the defect area at any position. It can be adapted to woven bags of different widths without replacing any parts, meeting the needs of multi-variety and small-batch production. (3) This device integrates the correction nozzle and the flat tangential air nozzle on the same connecting rod, and shares a set of moving drive mechanism and air source system. Compared with the split device, it greatly reduces the number of parts, simplifies the equipment structure, and reduces manufacturing costs. At the same time, the device can be directly installed on the existing woven bag production line without the need for large-scale modification of the original equipment. The modification cost is low and the installation cycle is short. (4) The device automatically identifies the position and defect status of the woven bag through diffuse reflection photoelectric sensor throughout the process. The control unit automatically completes the entire process of bag opening, air blowing correction, wrinkle removal, and defective product sorting without manual intervention. The end is equipped with adjustable main moving wheel and balance moving wheel, which can evenly press the processed inner film and outer bag together to ensure tight adhesion and improve the quality stability of subsequent heat sealing. (5) This device mainly adopts pneumatic and mechanical structure, with few moving parts and high reliability; all vulnerable parts are detachable and easy to replace; the air circuit system is equipped with a filter and pressure regulating unit, which can effectively filter dust and moisture in compressed air, prevent air nozzle blockage, and extend the service life of the equipment. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the overall device; Figure 2 This is a top view of the entire device; Figure 3 This is a schematic diagram of the overall back of the device; Figure 4 This is a schematic diagram of the top of the air compressor in this device; Figure 5 This is a schematic diagram of the top of the end conveyor frame of this device; Figure 6 This is a schematic diagram of the top of the conveyor belt at the end of this device; Figure 7 This is a schematic diagram of the bottom of the slide rail of this device; Figure 8 This is a schematic diagram of the bottom of the positioning rod of this device; Figure 9 This is a schematic diagram of the top of the wrinkle recognition adjustment frame of this device; Figure 10 This is a cross-sectional schematic diagram of the fold recognition adjustment frame of this device; Figure 11 This is a schematic diagram of the top of the conveyor belt of the adjusting frame in this device; Figure 12 This is a schematic diagram of the bottom of the positioning frame of this device; Figure 13 This is a schematic diagram of the internal structure of the lifting slider of this device; Figure 14 This is a schematic diagram of the top of the moving block of this device.

[0018] In the diagram: 1-End conveyor frame; 2-End conveyor frame; 3-Fold recognition adjustment frame; 4-Balance moving wheel; 5-Positioning frame; 6-Positioning rod; 7-Adjustment frame lifting rod; 8-Air compressor; 9-Tilting adjustment block; 101-Controller; 102-Outrigger; 103-Box door; 104-Fixed frame; 105-Positioning shaft; 106-Positioning plate; 107-Moving auxiliary wheel; 108-End conveyor belt; 201-End conveyor belt; 202-End positioning frame; 203-Slide rail; 204-Slide groove; 301-Adjustment frame conveyor belt; 302-Fixed plate; 303-Diffuse reflection photoelectric sensor; 304-Bottom sponge suction cup; 305-Bottom suction cup solenoid valve; 306-Bottom suction cup air supply pipe; 307-Bottom suction cup air pump; 401-Main moving wheel; 402-Connecting frame; 403-Bolt; 404-Slider; 405-Thread Mother; 501-Positioning frame slide rail; 601-Lifting rod; 602-Connecting plate positioning shaft; 603-Connecting plate; 604-Top suction cup air pump; 605-Top suction cup solenoid valve; 606-Top air supply pipe; 607-Top connecting frame; 608-Top sponge suction cup; 701-Lifting slider; 801-Air pump; 802-Main valve; 803-Conveying pipe; 804-Positioning clamp; 805-Hose; 806- Correction solenoid valve; 807-Correction nozzle; 808-Flat tangential air nozzle solenoid valve; 809-Flat tangential air nozzle; 901-Moving block; 902-Tilt adjustment motor; 903-Connecting rod; 904-Reversing motor; 905-Reversing block; 906-Moving screw; 907-Moving motor; 908-Revolution timer; 909-Reversing motor output shaft angle sensor; 910-Tilt adjustment block angle sensor. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1, by Figures 1-14The present invention provides an automatic pleat recognition and adjustment device for plastic woven bags, comprising a conveying mechanism, an adsorption mechanism at the top of the conveying mechanism, an adjustment mechanism on the outside of the adsorption mechanism, and recognition mechanisms at both ends of the adsorption mechanism; the conveying mechanism includes a pleat recognition and adjustment frame 3, and a plurality of adjustment frame conveyor belts 301 are rotatably connected inside the pleat recognition and adjustment frame 3 via rollers; the top of the pleat recognition and adjustment frame 3 is fixedly connected to a plurality of positioning frames 5 of the adjustment mechanism, each positioning frame 5 has a moving block 901 at its bottom, each moving block 901 is hinged to an inclination adjustment block 9, and each inclination adjustment block 9 is hinged to an inclination adjustment block 9. A connecting rod 903 is fixed inside the angle adjustment block 9; each connecting rod 903 has a correction nozzle 807 inside, each correction nozzle 807 has a flat tangential air nozzle 809 at its end, each correction nozzle 807 has a correction solenoid valve 806 fixed outside, and each flat tangential air nozzle 809 has a flat tangential air nozzle solenoid valve 808 fixed outside; the top of the positioning frame 5 is fixedly connected to several fixing plates 302 of the identification mechanism, and several diffuse reflection photoelectric sensors 303 are fixed at the bottom of each fixing plate 302; the device also includes a control unit; the diffuse reflection photoelectric sensors 303... The system collects real-time information on the movement position of the woven bag, converts and matches the signals for timing, and then transmits them to the control unit. The diffuse reflection photoelectric sensor 303 emits and receives diffuse reflection infrared light. Based on the difference in the intensity of the reflected light signal, it assists in determining the inner membrane offset state and woven bag wrinkles, and uploads the detection signal to the control unit. After receiving the data, the control unit first controls the correction solenoid valve 806 to activate, causing the correction nozzle 807 to output pulsed airflow to complete the inner membrane correction operation. After the correction is completed, the control unit drives the flat tangential air nozzle solenoid valve 808 to open and close, controlling the flat tangential air nozzle 809 to eject airflow, expelling trapped air in the interlayer between the woven bag and the inner membrane, and smoothing out the interlayer wrinkles. In this embodiment, the conveying mechanism is used to convey woven bags, the adsorption mechanism can open the woven bags to facilitate the correction of the inner membrane and smooth out the wrinkles between the woven bags and the inner membrane, the adjustment mechanism can correct the inner membrane by blowing air and blow out the residual gas between the inner membrane and the woven bag, the identification mechanism can identify the position of the woven bag, the exposed inner membrane, and the wrinkles of the woven bag, the wrinkle identification adjustment frame 3 is used to support the positioning frame 5, and the adjustment frame conveyor belt 301 can drive the woven bag at its top by rotating. The bag moves, the positioning frame 5 is used to support the fixing plate 302, the moving block 901 is used to position the tilt adjustment block 9, the connecting rod 903 is used to position the reversing block 905, the correction solenoid valve 806 can control the correction nozzle 807 to emit pulse airflow by emitting pulse signal, thereby blowing the inner film to move, thereby achieving the purpose of correction, and the flat tangential air nozzle solenoid valve 808 controls the flat tangential air nozzle 809 to continuously blow out airflow, which can blow out the residual gas between the inner film and the woven bag, thereby smoothing out wrinkles; The diffuse reflection photoelectric sensors 303, symmetrically arranged at both ends, collect reflected infrared light signals from the left and right sides of the bag opening. The control unit stores the reference light intensity value of a flat and defect-free woven bag. When the light intensity value collected by a single sensor is 15% lower than the reference light intensity value, it is determined that there is inner film overflow on that side. When the light intensity value collected by any sensor fluctuates continuously and the fluctuation amplitude exceeds 10% of the reference light intensity value, it is determined that there is wrinkle in the corresponding area. The control unit calculates the inner film offset direction and relative offset by comparing the light intensity difference between the two sensors. The control unit determines the inner membrane offset direction by comparing the light intensity difference between the sensors on both sides, and employs a closed-loop feedback control strategy: the offset direction is determined based on the sign of the light intensity difference, driving the moving motor 907 to move the moving block 9 to the opposite side of the offset inner membrane; during the movement, the changes in light intensity on both sides are monitored in real time, and when the light intensity difference between the two sides decreases to within 5% of the reference light intensity value, it is considered that the inner membrane has returned to the centered position, completing the correction. This control method does not require precise calculation of the offset distance; accurate centering can be achieved through real-time feedback.

[0021] The corrective nozzle 807 outputs a pulsed airflow pressure of 0.22-0.25 MPa, a single pulse duration of 20-25 ms, and a pulse frequency of 5 Hz; the flat tangential nozzle 809 outputs a continuous laminar airflow pressure of 0.25-0.3 MPa and a continuous blowing duration of 100-150 ms, wherein the fluid flows in layers and the airflow pattern between the layers does not mix, which has the characteristics of stable flow and uniform impact force; all airflow parameters can be adjusted through the human-machine interface of the controller 101. The flat tangential nozzle 809 integrates a honeycomb-shaped flow-rectifying structure, which consists of multiple hexagonal tubes arranged in parallel. The ratio of the tube length to its inner diameter is not less than 10, ensuring that the airflow forms a laminar flow pattern at the outlet where the layers do not mix, resulting in stable flow and uniform impact force. This flow-rectifying structure is integrally formed with the nozzle shell, guaranteeing that the delivered airflow remains in a laminar state within the effective operating distance. To verify the ability of a flat tangential nozzle blowing air from the bag opening to remove wrinkles in the middle of the bag body, the applicant conducted a simulation test. For a standard woven bag with an inner lining and a length of 800mm, with the bag opening opened to 20mm, a continuous laminar airflow at a pressure of 0.25MPa was blown into the inner layer of the bag through the flat tangential nozzle. A hot-wire anemometer was used to measure the airflow velocity at a distance of 400mm from the bag opening (middle of the bag body). The measured wind speed was stable at 1.8–2.2 m / s, which is sufficient to expel trapped air from the inner layer. After repeated testing, the inner lining in the middle of the bag body was smooth and adhered without any visible wrinkles. For woven bags longer than 1000mm, the same effect of removing wrinkles in the middle of the bag body could be achieved by extending the blowing time to 200ms or appropriately increasing the airflow pressure to 0.35MPa.

[0022] Furthermore, the conveying mechanism also includes an end conveyor frame 1, with a controller 101 detachably connected to the top of the end conveyor frame 1. The control unit is located inside the controller 101. Several end conveyor belts 108 are rotatably connected inside the end conveyor frame 1 via rollers. The conveying structure also includes an end conveyor frame 2, with an end positioning frame 202 fixed to the top of the end conveyor frame 2. Several end conveyor belts 201 are rotatably connected inside the end conveyor frame 2 via rollers. The side walls of the end conveyor frame 1, the end conveyor frame 2, and the pleat recognition and adjustment frame 3 are all detachably connected to a door 103. Several support legs 102 are detachably connected to the bottom of the end conveyor frame 1, the end conveyor frame 2, and the pleat recognition and adjustment frame 3. The bottom of the end positioning frame 202 is detachably connected to two slide rails 203, each of which... The 03 is provided with a sliding groove 204, and a plurality of sliders 404 are slidably connected inside each sliding groove 204. Each slider 404 is internally engaged with a bolt 403. Each slider 404 is externally slidably connected with a connecting frame 402. Each connecting frame 402 is tightly fitted with a nut 405 on its outer side. Each bolt 403 is engaged with the nut 405 on its outer side. Each connecting frame 402 at both ends is hinged to a main moving wheel 401 at its bottom. The bottom of the remaining connecting frames 402 is hinged to a balance moving wheel 4. The end positioning frame 202 and the end conveying frame 1 are both fixed with a fixing frame 104 on their top inner side. Each fixing frame 104 is internally hinged with a positioning shaft 105. At least two positioning plates 106 are hinged to each positioning shaft 105. Each positioning plate 106 is hinged to a moving auxiliary wheel 107 at its bottom. In this embodiment, the end conveyor 1 is used to convey woven bags filled with inner film to the pleat recognition and adjustment frame 3. The controller 101 is used to control the entire device. The end conveyor belt 108 is used to convey woven bags. The end positioning frame 202 is used to position the slide rail 203. The end conveyor belt 201 is used to convey woven bags that have completed the correction downstream. The box door 103 facilitates maintenance. The support leg 102 is used to support the entire device. The slide rail 203 is used to position the slider 404. The bolt 403 can lock the slider 404 and the slide groove 204 by rotation, thereby ensuring that the connecting frame 40 For stability of 2, the connecting frame 402 can rotate around the axis of the bolt 403. The connecting frame 402 is used to position the main moving wheel 401 and the balance moving wheel 4. The nut 405 is used to position the connecting frame 402. The main moving wheel 401 and the balance moving wheel 4 cooperate to compact the woven bag while ensuring the stability of the woven bag during transportation. The fixing frame 104 is used to position the positioning shaft 105. The positioning shaft 105 is used to position the positioning plate 106. The positioning plate 106 is used to position the moving auxiliary wheel 107. The moving auxiliary wheel 107 can ensure the stability of the woven bag during movement. In use, the entire device is installed and self-tested. The inner film is then placed into the woven bag via the film-coating device upstream of the end conveyor frame 1 and conveyed to the end conveyor belt 108. The rotation of the end conveyor belt 108 moves the woven bag to the top of the crease recognition and adjustment frame 3. The adjustment frame conveyor belt 301 is then activated, allowing the woven bag to move along with it. At this point, the moving auxiliary wheel 107 initially flattens the woven bag. After correction and crease smoothing are completed, the control unit drives the adjustment frame conveyor belt 301 to continue rotating, conveying the bag to the end conveyor belt 201. The end conveyor belt 201 then transports the woven bag to the next workstation, where the balancing moving wheel 4 and the main moving wheel 401 further compress the bag. The woven bag and inner film are combined to ensure stable movement of the woven bag. The slider 404 can be loosened by rotating the bolt 403, allowing it to move along the groove 204. Furthermore, it facilitates changing the distance between the balance wheel 4 and the main wheel 401 to accommodate woven bags of different sizes. During use, the connecting frame 402 can rotate around the axis of the bolt 403. That is, when the balance wheel 4 and the main wheel 401 are not subjected to external force, they are frictionally connected to the end conveyor belt 201. When the woven bag reaches the bottom of the balance wheel 4 and the main wheel 401, they are supported, allowing the balance wheel 4 and the main wheel 401 to move on top of the woven bag.

[0023] Furthermore, the wrinkle recognition adjustment frame 3 is detachably connected to several bottom sponge suction cups 304. The bottoms of the several bottom sponge suction cups 304 are fixedly connected via bottom suction cup air supply pipes 306. Each bottom sponge suction cup 304 is provided with a bottom suction cup solenoid valve 305, which is fixedly connected to the bottom suction cup air supply pipe 306. Each bottom suction cup air supply pipe 306 is fixedly equipped with a bottom suction cup air pump 307. Each bottom sponge suction cup 304 is provided with a top sponge suction cup 608 at its top. Each top sponge suction cup 608 is fixedly equipped with a top connecting frame 607 at its top. Several top connecting frames 607 are fixedly equipped with connecting plates 6 at their tops. 03. Several connecting plate positioning shafts 602 are fixed to the top of the connecting plate 603. Positioning rods 6 are slidably connected to the top of the several connecting plate positioning shafts 602. The positioning rods 6 are detachably connected to the positioning frame 5. A lifting rod 601 is fixed to the top of the connecting plate 603. The other end of the lifting rod 601 is fixedly connected to the positioning rod 6. A top suction cup air pump 604 is also fixed to the bottom of the connecting plate 603. A top air supply pipe 606 is fixed to the bottom of the top suction cup air pump 604. Two top suction cup solenoid valves 605 are fixed on the top air supply pipe 606. The end of the top air supply pipe 606 is fixedly connected to the top sponge suction cup 608. In this embodiment, the bottom sponge suction cup 304 is used for negative pressure adsorption of the bottom of the woven bag. The bottom suction cup air pump 307 and the bottom suction cup solenoid valve 305 cooperate to extract the air from the top of the bottom sponge suction cup 304. The top sponge suction cup 608 is used for negative pressure adsorption of the top of the woven bag. The top connecting frame 607 is used to position the top sponge suction cup 608. The connecting plate 603 is used to position the top connecting frame 607. The connecting plate positioning shaft 602 is used to position the connecting plate 603, thereby ensuring the stability of the top sponge suction cup 608 when it is raised and lowered, thus preventing the woven bag from shaking. The positioning rod 6 is used to position the connecting plate positioning shaft 602. The lifting rod 601 is telescopic, thereby driving the connecting plate 603 to rise and fall. The top suction cup air pump 604 and the top suction cup solenoid valve 605 cooperate to extract the air between the top sponge suction cup 608 and the top of the woven bag through the top air supply pipe 606, thereby facilitating the opening of the woven bag. The lifting rod 601 initially extends by 100mm, causing the top sponge suction cup 608 to descend close to the top of the woven bag; after adsorption is completed, the lifting rod 601 retracts by 10-20mm, increasing the distance between the top sponge suction cup 608 and the bottom sponge suction cup 304, and opening the woven bag opening to a standard opening of 15-20mm. When the diffuse reflection photoelectric sensor 303 fails to detect inner membrane displacement or wrinkle defects in at least two consecutive signal acquisitions, the control unit directly drives the adjustment frame conveyor belt 301 to continue rotating and transport the woven bag to the next station; when the blowing operation is completed and the sensor detects that there are still defects, the control unit triggers an audible and visual alarm and drives the adjustment frame conveyor belt 301 to transport the woven bag to the preset defective product collection area. The top sponge suction cup 608 and the bottom sponge suction cup 304 are porous sponge vacuum suction cups with wear-resistant rubber lips, which can adapt to the rough surface and slight deformation of the woven bag and are suitable for negative pressure adsorption of breathable woven bags. When the woven bag moves to the top of the adjusting frame conveyor belt 301, the diffuse reflection photoelectric sensor 303 collects the woven bag's position information in real time and transmits the information to the control unit. At the same time, the diffuse reflection photoelectric sensor 303 assists in judging the inner film offset state and woven bag wrinkle defects based on the difference in the intensity of the reflected light signal. When this happens, the control unit inside the controller 101 controls the adjusting frame conveyor belt 301 to stop working. Furthermore, the control unit drives the bottom suction cup air pump 307 and the bottom suction cup solenoid valve 305 to work together, so that the bottom sponge suction cup 304 adheres to the bottom of the woven bag. At the same time, the control unit drives the lifting rod 601 to extend, so that the connecting plate 603 descends, so that the top sponge suction cup 608 is close to the top of the woven bag. At this time, the control unit controls the top suction cup air pump 604 and the top suction cup solenoid valve 605 to work together, so that the top sponge suction cup 608 adheres to the top of the woven bag. Furthermore, the control unit drives the lifting rod 601 to retract a certain length, so that the top sponge suction cup 608 and the bottom sponge suction cup 304 open up the woven bag.

[0024] Furthermore, each positioning frame 5 is provided with a positioning frame slide groove 501, and a lifting slider 701 is slidably connected inside each positioning frame slide groove 501. An adjusting frame lifting rod 7 is fixed to the top of each lifting slider 701, and the top of each adjusting frame lifting rod 7 is fixedly connected to the top wall of the positioning frame 5. A moving screw 906 is hinged inside each lifting slider 701, and a rotation timer 908 is fixed to the end of each moving screw 906. A moving motor 907 is fixed inside each lifting slider 701. The output shaft of each of the moving motors 907 is fixedly connected to one end of the moving screw 906, and each moving screw 906 is engaged with the external moving block 901; a tilt adjustment motor 902 is fixedly fixed to the end of each moving block 901, and the output shaft of each tilt adjustment motor 902 is fixedly connected to one end of the tilt adjustment block 902, and a tilt adjustment block angle sensor 910 is fixedly fixed to the outside of the output shaft of each tilt adjustment motor 902; a reversing block 90 is hinged inside each connecting rod 903. 5. Each of the end reversing blocks 905 is fixedly connected to the inner side of the correction nozzle 807, and each of the end reversing blocks 905 is fixedly connected to the inner side of the flat tangential air nozzle 809; at least two reversing motors 904 are fixedly connected to the top of each connecting rod 903, the output shaft of each reversing motor 904 is fixedly connected to the bottom reversing block 905, and a reversing motor output shaft angle sensor 909 is fixedly fixed to the outside of the output shaft of each reversing motor 904; one end of the wrinkle recognition adjustment frame 3 is provided with An air compressor 8 is provided, and an air pump 801 is fixed to the top of the air compressor 8. A main valve 802 is fixed to the top of the air pump 801. A delivery pipe 803 is fixed to the top of the main valve 802. The delivery pipe 803 is detachably connected to the positioning rod 6 via positioning clamps 804. Positioning clamps 804 are detachably connected to both ends of the delivery pipe 803. One end of each positioning clamp 804 is detachably connected to the correction solenoid valve 806, and the other end of each positioning clamp 804 is detachably connected to the flat tangential air nozzle solenoid valve 808. In this embodiment, the positioning frame groove 501 is used to position the lifting slider 701, the lifting slider 701 is used to position the moving block 901, the adjusting frame lifting rod 7 is telescopic, thereby driving the lifting slider 701 to rise and fall, so that the connecting rod 903 can be moved to the middle position of the opened woven bag. The moving screw 906 can drive the moving block 901 to move by rotating, thereby driving the connecting rod 903 to move, thereby changing the position of the correction nozzle 807 and the flat tangential air nozzle 809, so that air can be blown at any position of the woven bag opening, thereby flattening the woven bag opening at any position. The tilt adjustment motor 902 can drive the tilt adjustment block 9 to rotate, thereby adjusting the tilt angle of the correction nozzle 807 and the flat tangential air nozzle 809. The tilt adjustment block angle sensor 910 can monitor the tilt adjustment block 9. The rotation angle is measured by the rotation timer 908, which measures the number of rotations of the moving screw 906. The lead of the moving screw 906 is 5mm, meaning that for every rotation of the screw, the moving block 901 meshing with it moves 5mm along the screw axis. The rotation timer 908 records the number of rotations of the moving screw 906 in real time. The control unit accurately calculates the real-time position of the moving block 901 through the conversion relationship of "moving distance = number of rotations × lead". The reversing motor 904 can drive the reversing block 905 to rotate, thereby changing the angle of the flat tangential nozzle 809 and the correction nozzle 807, thus changing the blowing direction. The reversing motor output shaft angle sensor 909 is used to monitor the rotation angle of the reversing block 905. The positioning clamp 804 is used to deliver the required airflow to the correction nozzle 807 and the flat tangential nozzle 809. After the woven bag is opened, the control unit controls the extension of the adjusting frame lifting rod 7 according to the extension and retraction of the lifting rod 601, so that the lifting slider 701 descends to the middle of the space where the woven bag is opened; if a misalignment between the inner membrane and the woven bag is detected, the control unit controls the moving motor 907 to rotate the moving screw 906 according to the misalignment position, driving the moving block 901 to move to the opposite side of the exposed inner membrane. The control unit drives the tilt adjustment motor 902 to change the tilt angle of the tilt adjustment block 9, so that the orientation of the correction nozzle 807 is perpendicular to the exposed inner membrane. At this time, through the air... Pump 801 and the main valve 802 deliver the gas inside the air compressor 8 to the positioning clamp 804. The correction solenoid valve 806 is activated, causing the correction nozzle 807 to output pulsed airflow, which impacts the inner membrane at a fixed frequency, causing the inner membrane to shift and completing the inner membrane correction operation. After the correction is completed, the moving screw 906 is driven to move, and the correction solenoid valve 806 is closed, causing the flat tangential air nozzle solenoid valve 808 to activate. At this time, the flat tangential air nozzle 809 blows airflow between the inner membrane and the woven bag, blowing out the gas between the woven bag and the inner membrane, completing the wrinkle removal operation.

[0025] The method of using the automatic recognition and adjustment device for plastic woven bag wrinkles in this embodiment, based on the automatic recognition and adjustment device for plastic woven bag wrinkles as described above, includes the following steps: Step 1: Install the entire device and perform a self-inspection. Then, place the inner film into the woven bag through the film-covering device upstream of the end conveyor 1 and convey it to the end conveyor belt 108. The end conveyor belt 108 moves the woven bag to the top of the pleat recognition and adjustment frame 3. Step 2: Start the adjusting frame conveyor belt 301 so that the woven bag can move with the adjusting frame conveyor belt 301. At this time, the moving auxiliary wheel 107 initially flattens the woven bag. At this time, the diffuse reflection photoelectric sensor 303 collects the woven bag's movement position information in real time and transmits the information to the control unit. At the same time, the diffuse reflection photoelectric sensor 303 assists in judging the inner film offset state and woven bag wrinkle defects based on the difference in the intensity of the reflected light signal. When the control unit inside the controller 101 controls the adjusting frame conveyor belt 301 to stop working, if the diffuse reflection photoelectric sensor 303 does not identify the inner film offset and wrinkle defects, the control unit does not perform the air blowing operation and directly drives the adjusting frame conveyor belt 301 to continue rotating, conveying the woven bag to the end conveyor belt 201. Step 3: The control unit drives the bottom suction cup air pump 307 and the bottom suction cup solenoid valve 305 to work together, so that the bottom sponge suction cup 304 can adhere to the bottom of the woven bag. At the same time, the control unit drives the lifting rod 601 to extend, so that the connecting plate 603 can descend, so that the top sponge suction cup 608 can come close to the top of the woven bag. At this time, the control unit controls the top suction cup air pump 604 and the top suction cup solenoid valve 605 to work together, so that the top sponge suction cup 608 can adhere to the top of the woven bag. Further, the control unit drives the lifting rod 601 to retract a certain length, so that the top sponge suction cup 608 and the bottom sponge suction cup 304 can open up the woven bag. Step 4: The control unit controls the extension of the lifting rod 7 of the adjusting frame according to the extension amount of the lifting rod 601, so that the lifting slider 701 descends to the middle of the space opened by the woven bag; Step 5: If a misalignment is detected between the inner membrane and the woven bag, the control unit controls the moving motor 907 to rotate the moving screw 906 according to the misalignment position, driving the moving block 901 to move to the opposite side of the exposed inner membrane. The control unit drives the tilt adjustment motor 902 to change the tilt angle of the tilt adjustment block 9, so that the orientation of the correction nozzle 807 is perpendicular to the exposed inner membrane. At this time, the air inside the air compressor 8 is delivered to the positioning clamp 804 through the air pump 801 and the main valve 802. The correction solenoid valve 806 is activated, causing the correction nozzle 807 to output pulse airflow, which impacts the inner membrane at a fixed frequency, causing the inner membrane to deviate, thus completing the inner membrane correction operation. Step 6: After completing the correction, drive the moving screw 906 to move, and at the same time close the correction solenoid valve 806, so that the flat tangential air nozzle solenoid valve 808 is activated. At this time, the flat tangential air nozzle 809 blows air between the inner membrane and the woven bag, blowing out the gas between the woven bag and the inner membrane, and completing the wrinkle removal work. Step 7: After the correction and wrinkle smoothing are completed, the control unit drives the adjustment frame conveyor belt 301 to continue rotating and transports the bag to the end conveyor belt 201. The end conveyor belt 201 transports the woven bag to the next station. The balancing moving wheel 4 and the main moving wheel 401 can compact the woven bag and the inner film, while ensuring the stability of the woven bag movement.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic pleat recognition and adjustment device for plastic woven bags, characterized in that: The system includes a conveying mechanism, an adsorption mechanism at the top of the conveying mechanism, an adjustment mechanism on the outside of the adsorption mechanism, and identification mechanisms at both ends of the adsorption mechanism. The conveying mechanism includes a pleat recognition adjustment frame (3), and a number of adjustment frame conveyor belts (301) are rotatably connected inside the pleat recognition adjustment frame (3) via rollers. The top of the wrinkle recognition adjustment frame (3) is fixedly connected to several positioning frames (5) of the adjustment mechanism. Each positioning frame (5) has a moving block (901) at its bottom. Each moving block (901) is hinged to an angle adjustment block (9). Each angle adjustment block (9) has a connecting rod (903) fixed inside its inner side. Each of the connecting rods (903) has a correction nozzle (807) on its inner side, a flat tangential air nozzle (809) at the end of each correction nozzle (807), a correction solenoid valve (806) fixed on the outer side of each correction nozzle (807), and a flat tangential air nozzle solenoid valve (808) fixed on the outer side of each flat tangential air nozzle (809). The top of the positioning frame (5) is fixedly connected to several fixing plates (302) of the identification mechanism, and several diffuse reflection photoelectric sensors (303) are fixed at the bottom of each fixing plate (302). This device also includes a control unit; The diffuse reflection photoelectric sensor (303) collects the real-time position information of the woven bag, converts and matches the signal to the timing, and then transmits it to the control unit. The diffuse reflection photoelectric sensor (303) emits and receives diffuse reflection infrared light. Based on the difference in the intensity of the reflected light signal, it helps to determine the inner membrane offset state and the woven bag wrinkle defect, and uploads the detection signal to the control unit. After receiving the data, the control unit first controls the correction solenoid valve (806) to operate, so that the correction nozzle (807) outputs pulse airflow to complete the inner membrane correction operation. After the correction is completed, the control unit drives the flat tangential air nozzle solenoid valve (808) to open and close, and controls the flat tangential air nozzle (809) to spray airflow, expelling the trapped air in the woven bag and inner membrane interlayer, and smoothing out the interlayer wrinkles.

2. The automatic identification and adjustment device for pleats in plastic woven bags according to claim 1, characterized in that: The conveying mechanism also includes an end conveyor frame (1), and a controller (101) is detachably connected to the top of the end conveyor frame (1). The control unit is located inside the controller (101), and several end conveyor belts (108) are rotatably connected inside the end conveyor frame (1) via rollers. The conveying structure also includes an end conveyor frame (2), with an end positioning frame (202) fixed on the top of the end conveyor frame (2), and several end conveyor belts (201) are rotatably connected inside the end conveyor frame (2) via rollers. The side walls of the end conveyor (1), the end conveyor (2), and the fold recognition adjustment frame (3) are all detachably connected with a box door (103), and the bottom of the end conveyor (1), the end conveyor (2), and the fold recognition adjustment frame (3) are all detachably connected with several support legs (102).

3. The automatic identification and adjustment device for pleats in plastic woven bags according to claim 2, characterized in that: The end positioning frame (202) has two slide rails (203) detachably connected to its bottom. Each slide rail (203) is provided with a slide groove (204). Several sliders (404) are slidably connected inside each slide groove (204). Each slider (404) is engaged with a bolt (403). Each slider (404) is externally slidably connected to a connecting frame (402), and a nut (405) is tightly fitted to the outside of each connecting frame (402). Each bolt (403) is engaged with the nut (405) on its outside. Each of the connecting frames (402) at both ends is hinged to a main moving wheel (401) at its bottom, and the remaining connecting frames (402) are hinged to a balance moving wheel (4) at their bottom.

4. The automatic identification and adjustment device for pleats in plastic woven bags according to claim 3, characterized in that: The end positioning frame (202) and the end conveying frame (1) are both fixed with a fixing frame (104) on the inner side of the top. Each fixing frame (104) has a positioning shaft (105) hinged inside. Each positioning shaft (105) has at least two positioning plates (106) hinged on it. Each positioning plate (106) has a moving auxiliary wheel (107) hinged at the bottom.

5. The automatic recognition and adjustment device for pleats in plastic woven bags according to claim 4, characterized in that: The wrinkle recognition adjustment frame (3) has several bottom sponge suction cups (304) detachably connected inside. The bottom of the several bottom sponge suction cups (304) is fixedly connected through bottom suction cup air supply pipes (306). Each bottom sponge suction cup (304) is provided with a bottom suction cup solenoid valve (305) which is fixedly connected to the bottom suction cup air supply pipe (306). Each bottom suction cup air supply pipe (306) is fixed with a bottom suction cup air pump (307).

6. The automatic recognition and adjustment device for pleats in plastic woven bags according to claim 5, characterized in that: Each of the bottom sponge suction cups (304) is provided with a top sponge suction cup (608) at the top, and a top connecting frame (607) is fixed at the top of each of the top sponge suction cups (608). A connecting plate (603) is fixed at the top of several of the top connecting frames (607), and a number of connecting plate positioning shafts (602) are fixed at the top of the connecting plate (603). A positioning rod (6) is slidably connected at the top of the number of connecting plate positioning shafts (602), and the positioning rod (6) is detachably connected to the positioning frame (5). A lifting rod (601) is fixed to the top of the connecting plate (603), and the other end of the lifting rod (601) is fixedly connected to the positioning rod (6); The bottom of the connecting plate (603) is also fixed with a top suction cup air pump (604), the bottom of the top suction cup air pump (604) is fixed with a top air supply pipe (606), two top suction cup solenoid valves (605) are fixed on the top air supply pipe (606), and the end of the top air supply pipe (606) is fixedly connected to the top sponge suction cup (608).

7. The automatic wrinkle recognition and adjustment device for plastic woven bags according to claim 6, characterized in that: Each of the positioning frames (5) is provided with a positioning frame slide groove (501), and a lifting slider (701) is slidably connected inside each of the positioning frame slide grooves (501). An adjustment frame lifting rod (7) is fixed on the top of each of the lifting sliders (701), and the top of each adjustment frame lifting rod (7) is fixedly connected to the top wall of the positioning frame (5). Each of the lifting sliders (701) has a movable screw (906) hinged inside, and a rotation timer (908) is fixed at the end of each movable screw (906). Each of the lifting sliders (701) has a movable motor (907) fixed inside, and the output shaft of each movable motor (907) is fixedly connected to the movable screw (906) at one end of it. Each movable screw (906) is engaged with the movable block (901) outside it.

8. The automatic wrinkle recognition and adjustment device for plastic woven bags according to claim 7, characterized in that: Each of the moving blocks (901) is fixed with a tilt adjustment motor (902) at its end. The output shaft of each tilt adjustment motor (902) is fixedly connected to the tilt adjustment block (9) at one end of it. An angle sensor (910) of the tilt adjustment block is fixed outside the output shaft of each tilt adjustment motor (902). Each of the connecting rods (903) has a reversing block (905) hinged inside. Each of the reversing blocks (905) at the end is fixedly connected to the correction nozzle (807) on its inner side, and each of the reversing blocks (905) at the end is fixedly connected to the flat tangential air nozzle (809) on its inner side. At least two commutator motors (904) are fixedly connected to the top of each connecting rod (903), the output shaft of each commutator motor (904) is fixedly connected to the commutator block (905) at its bottom, and a commutator motor output shaft angle sensor (909) is fixedly attached to the outside of the output shaft of each commutator motor (904).

9. The automatic identification and adjustment device for pleats in plastic woven bags according to claim 8, characterized in that: One end of the wrinkle recognition adjustment frame (3) is equipped with an air compressor (8), the top of the air compressor (8) is fixed with an air pump (801), the top of the air pump (801) is fixed with a main valve (802), the top of the main valve (802) is fixed with a delivery pipe (803), and the delivery pipe (803) is detachably connected to the positioning rod (6) through a positioning clamp (804); Positioning clips (804) can be detachably connected to both ends of the delivery pipe (803). One end of each positioning clip (804) is detachably connected to the correction solenoid valve (806), and the other end of each positioning clip (804) is detachably connected to the flat tangential air nozzle solenoid valve (808).

10. A method of using the automatic pleat recognition and adjustment device for plastic woven bags, based on the automatic pleat recognition and adjustment device for plastic woven bags as described in claim 9, characterized in that: Includes the following steps: Step 1: Install the entire device and perform a self-inspection. Then, place the inner film into the woven bag through the film-making device upstream of the end conveyor (1) and convey it to the end conveyor belt (108). The woven bag is moved to the top of the pleat recognition adjustment frame (3) by the end conveyor belt (108). Step 2: Start the adjustment frame conveyor belt (301) so that the woven bag can move with the adjustment frame conveyor belt (301). At this time, the woven bag is initially flattened due to the action of the moving auxiliary wheel (107). At this time, the diffuse reflection photoelectric sensor (303) collects the woven bag's movement position information in real time and transmits the information to the control unit. At the same time, the diffuse reflection photoelectric sensor (303) assists in judging the inner film offset state and woven bag wrinkle defects based on the difference in the intensity of the reflected light signal. When the control unit inside the controller (101) controls the adjustment frame conveyor belt (301) to stop working, if the diffuse reflection photoelectric sensor (303) does not identify the inner film offset and wrinkle defects, the control unit does not perform the air blowing operation and directly drives the adjustment frame conveyor belt (301) to continue rotating, conveying the woven bag to the end conveyor belt (201). Step 3: The control unit drives the bottom suction cup air pump (307) and the bottom suction cup solenoid valve (305) to work together, so that the bottom sponge suction cup (304) adsorbs the bottom of the woven bag. At the same time, the control unit drives the lifting rod (601) to extend, so that the connecting plate (603) descends, so that the top sponge suction cup (608) is close to the top of the woven bag. At this time, the control unit controls the top suction cup air pump (604) and the top suction cup solenoid valve (605) to work together, so that the top sponge suction cup (608) adsorbs the top of the woven bag. The control unit further drives the lifting rod (601) to retract a certain length, so that the top sponge suction cup (608) and the bottom sponge suction cup (304) open the woven bag. Step 4: The control unit controls the extension of the lifting rod (7) of the adjustment frame according to the extension amount of the lifting rod (601), so that the lifting slider (701) descends to the middle of the space opened by the woven bag; Step 5: If the inner membrane is found to be misaligned with the woven bag, the control unit controls the moving motor (907) to rotate the moving screw (906) according to the misalignment position, which drives the moving block (901) to move to the opposite side of the exposed inner membrane. The control unit drives the tilt adjustment motor (902) to change the tilt angle of the tilt adjustment block (9), so that the orientation of the correction nozzle (807) is perpendicular to the exposed inner membrane. At this time, the air compressor (8) delivers the gas inside to the positioning clamp (804) through the air pump (801) and the main valve (802). The correction solenoid valve (806) is activated to make the correction nozzle (807) output pulse airflow to impact the inner membrane at a fixed frequency, causing the inner membrane to deviate and completing the inner membrane correction operation. Step 6: After completing the correction, drive the moving screw (906) to move, and at the same time close the correction solenoid valve (806) to make the flat tangential air nozzle solenoid valve (808) act. At this time, the flat tangential air nozzle (809) blows air between the inner membrane and the woven bag, blowing out the gas between the woven bag and the inner membrane, and completing the wrinkle removal work. Step 7: After the correction and wrinkle smoothing are completed, the control unit drives the adjustment frame conveyor belt (301) to continue rotating and transports it to the end conveyor belt (201). The end conveyor belt (201) transports the woven bag to the next station. The woven bag and inner film can be compacted by the action of the balance moving wheel (4) and the main moving wheel (401), while ensuring the stability of the woven bag movement.

Images