Full-automatic M-shaped folding machine

Abstract

The utility model relates to a full-automatic M-shaped folding machine. According to the technical scheme, the full-automatic M-shaped folding machine is characterized by comprising a rack; the machine frame is provided with a bag opening mechanism used for carrying out bag opening treatment on packaging bags, a bag opening mechanism used for further opening bag openings of the opened packaging bags, and a bag collecting mechanism used for being matched with the bag opening mechanism to fold the bag openings of the opened packaging bags into M-shaped structures. The driving mechanism is used for driving the bag opening mechanism and the bag collecting mechanism to synchronously move up and down; the control mechanism is electrically connected with the bag opening mechanism, the bag opening mechanism, the bag collecting mechanism and the driving mechanism. The full-automatic M-shaped bag opening folding device is stable in overall structure and convenient to install, full-automatic M-shaped bag opening folding operation of packaging bag openings can be achieved, the production and processing efficiency is effectively improved, and the manual labor cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and more specifically, it relates to a fully automatic M-type folding machine. Background Technology

[0002] Most new energy powder and granular materials are packaged using straight-open bags and M-shaped open bags. Currently, the bag opening folding of M-shaped bags in automated packaging equipment for new energy materials on the market is all done manually. In the new energy material packaging industry, elements such as copper, zinc, and nickel must be strictly prohibited. Therefore, after the main machine unloads and bags the materials, the bag opening is manually folded and then sealed to prevent contamination by foreign objects. Manual bag handling often results in material contamination due to unavoidable human factors such as worker carelessness, leading to product quality problems. At the same time, manual labor is labor-intensive, costly, and has low production efficiency. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fully automatic M-type folding machine to solve the technical problems existing in the background technology.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a fully automatic M-type folding machine, comprising: a frame; the frame is provided with an opening mechanism for opening a packaging bag, a supporting mechanism for further expanding the opening of the opened packaging bag, a closing mechanism for cooperating with the supporting mechanism to fold the opening of the expanded packaging bag into an M-shaped structure, a driving mechanism for driving the supporting mechanism and the closing mechanism to move up and down synchronously, and a control mechanism; the control mechanism is electrically connected to the opening mechanism, the supporting mechanism, the closing mechanism and the driving mechanism respectively.

[0005] Optionally, the bag-supporting mechanism includes: a fixed plate, two first pusher cylinders, two first support columns, two second support columns, and two second pusher cylinders; the fixed plate is fixedly connected to the bag-collecting mechanism; a square elongated hole is provided on the fixed plate along its length; a first guide rail and a second guide rail are arranged in parallel from the inside to the outside on one side of the elongated hole;

[0006] Two first pusher cylinders are respectively fixedly installed in the middle of the first guide rail and the second guide rail, and the output ends of the two first pusher cylinders are arranged opposite to each other; each output end of the first pusher cylinder is provided with a first connecting block; the two first connecting blocks are respectively fixedly connected to the two first support columns; the two first support columns are respectively slidably installed in the elongated hole, and are respectively located at both ends of the side of the elongated hole near the first pusher cylinder; a first permanent magnet is provided on the first guide rail and the second guide rail along their length direction; a second permanent magnet adapted to the first permanent magnet is provided at the bottom of the two first connecting blocks, so that the two first connecting blocks are magnetically levitated above the first guide rail and the second guide rail respectively; a third guide rail and a second guide rail are arranged in parallel from the inside to the outside on the other side of the elongated hole. Two guide rails; two second pusher cylinders are respectively fixedly installed in the middle of the third and fourth guide rails, and the output ends of the two second pusher cylinders are arranged opposite to each other; each output end of the second pusher cylinder is provided with a second connecting block; the two second connecting blocks are respectively fixedly connected to the two second support columns; the two second support columns are respectively slidably installed in the elongated hole, and are respectively located at both ends of the elongated hole near the second pusher cylinder; a third permanent magnet is provided on the third and fourth guide rails along their length direction; a fourth permanent magnet adapted to the third permanent magnet is provided at the bottom of the two second connecting blocks, so that the two second connecting blocks are magnetically levitated above the third and fourth guide rails respectively; the first pusher cylinder and the second pusher cylinder are respectively connected to the control mechanism.

[0007] Optionally, the bag-collecting mechanism includes: a first support frame, a drive motor, a ball screw, two ball nuts, two connecting seats, and two blades; the first support frame is fixedly connected to the output end of the drive mechanism; the first support frame is fixedly connected to the fixed plate via four columns and is located above the fixed plate; the ball screw is rotatably mounted on the first support frame; the drive motor is fixedly mounted on the first support frame, and its output end is drively connected to the input end of the ball screw; the two ball nuts are arranged in a relative position on the output end of the ball screw; the two ball nuts are respectively fixedly connected to one end of each of the two connecting seats; the first support frame... The bottom of the first support frame is provided with a groove that communicates with the elongated hole; the bottom of the first support frame is provided with two limiting guide rails on both sides of the groove to form a sliding track; the other ends of the two connecting seats pass through the groove and are placed in the two sliding tracks, and are respectively fixedly connected to one end of the two blades; a plurality of fifth permanent magnets are provided on the inner side of the sliding track; a plurality of sixth permanent magnets corresponding to the plurality of fifth permanent magnets are provided on the connecting seats, so that the end of the connecting seat near the blade is magnetically levitated and housed in the sliding track; the other ends of the two blades pass through the elongated hole and are placed below the fixing plate; the drive motor is electrically connected to the control mechanism.

[0008] Optionally, the bag opening mechanism includes: two bag opening arms; the two bag opening arms are symmetrically installed on both sides of the frame; the operating ends of both bag opening arms are located below the fixed plate; each bag opening arm includes: a first drive cylinder, a fixed base, a second support frame, a second drive cylinder, a mounting base, and at least one suction cup; the fixed base is fixedly connected to the frame; the first drive cylinder is mounted on the fixed base, and its output end passes through the fixed base and is fixedly connected to the second support frame; the mounting base is slidably connected to the second support frame; the second drive cylinder is mounted on the second support frame, and its output end passes through the second support frame and is slidably connected to the mounting base; the suction cup is mounted on the mounting base; the first drive cylinder and the second drive cylinder are respectively electrically connected to the control mechanism.

[0009] Optionally, the drive mechanism includes: a third drive cylinder and a mounting plate; the cylinder is mounted on the frame and its output end is fixedly connected to the mounting plate; the mounting plate is fixedly connected to the first support frame; the mounting plate is slidably connected to the frame via four guide columns; the third drive cylinder is electrically connected to the control mechanism.

[0010] This utility model has a stable overall structure and is easy to install. It can realize fully automatic M-shaped bag opening folding operation, effectively improving production and processing efficiency and reducing labor costs. At the same time, the magnetic levitation installation method is used to assemble the support column of the bag-supporting mechanism and the blade of the bag-opening mechanism, which can avoid the metal friction generated during the M-shaped bag opening folding process, which can cause foreign object contamination and lead to product quality problems. Attached Figure Description

[0011] Figure 1 This is an assembly drawing of this utility model;

[0012] Figure 2 yes Figure 1 The front view;

[0013] Figure 3 yes Figure 2 Enlarged image in the image;

[0014] Figure 4 yes Figure 1 Side view;

[0015] Figure 5 This is a schematic diagram of the bag opening mechanism and its components of this utility model.

[0016] In the diagram: 1. Frame; 2. Bag opening mechanism; 21. Bag opening arm; 2101. First drive cylinder; 2102. Fixed base; 2103. Second support frame; 2104. Second drive cylinder; 2105. Mounting base; 2106. Suction cup; 3. Bag supporting mechanism; 301. Fixed plate; 302. First push cylinder; 303. First support column; 304. Second support column; 305. Second push cylinder; 306. First guide rail; 307. Second guide rail; 308. First connecting block; 309. First permanent magnet; 3010. 3011. Second permanent magnet; 3012. Third guide rail; 3013. Fourth guide rail; 3014. Third permanent magnet; 3015. Fourth permanent magnet; 3016. Second connecting block; 4. Bag collecting mechanism; 401. First support frame; 402. Drive motor; 403. Ball screw; 404. Ball nut; 405. Connecting seat; 406. Blade; 407. Sliding rail; 408. Fifth permanent magnet; 409. Sixth permanent magnet; 4010. Transmission belt; 5. Drive mechanism; 501. Third drive cylinder; 502. Mounting plate. Detailed Implementation

[0017] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0019] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "vertical," "horizontal," "left," "right," "above," "below," and similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] This utility model provides a fully automatic M-type folding machine, such as Figure 1-5 As shown, it includes: a frame 1; the frame 1 is provided with an opening mechanism 2 for opening the packaging bag, a bag-supporting mechanism 3 for further expanding the opening of the opened packaging bag, a bag-closing mechanism 4 for cooperating with the bag-supporting mechanism 3 to fold the opening of the expanded packaging bag into an M-shaped structure, a driving mechanism 5 for driving the bag-supporting mechanism 3 and the bag-closing mechanism 4 to move up and down synchronously, and a control mechanism; the control mechanism is electrically connected to the opening mechanism 2, the bag-supporting mechanism 3, the bag-closing mechanism 4 and the driving mechanism 5 respectively.

[0022] In this embodiment, as Figure 1-5As shown, the control mechanism includes a controller and a control cabinet, wherein the controller can be a microcontroller, MCU, PLC, or other controller capable of controlling the orderly operation of various electrical components. In this embodiment, an MCU is selected. During assembly, the fully automatic M-type folding machine is installed on a fully automatic production line. During operation, when the packaging bag to be folded in an M-shape is conveyed to the station of the fully automatic M-type folding machine by the gripper mechanism on the production line, the bag opening mechanism 2 first operates to perform a suction opening operation on the bag opening. After the bag is opened, the drive mechanism 5 drives the bag supporting mechanism 3 and the bag collecting mechanism 4 to move downward synchronously, pushing the bag supporting mechanism 3 into the bag opening, while the bag collecting mechanism 4 is located on the outside of the bag opening. Then, the bag supporting mechanism 3 and the bag collecting mechanism 4 cooperate to fold the bag opening of the packaging bag into an M-shaped structure. The overall structure is stable and easy to install, and can realize fully automatic M-type bag opening folding operation of the packaging bag, effectively improving production efficiency and reducing labor costs.

[0023] Further, the bag-supporting mechanism 3 includes: a fixed plate 301, two first pushing cylinders 302, two first support columns 303, two second support columns 304, and two second pushing cylinders 305; the fixed plate 301 is fixedly connected to the bag-collecting mechanism 4; a square elongated hole is formed on the fixed plate 301 along its length; a first guide rail 306 and a second guide rail 307 are arranged in parallel from the inside to the outside on one side of the elongated hole; the two first pushing cylinders 302 are respectively fixedly installed in the middle of the first guide rail 306 and the second guide rail 307, and the output ends of the two first pushing cylinders 302 are... The two first pusher cylinders 302 are arranged opposite to each other; each of the output ends of the two first pusher cylinders 302 is provided with a first connecting block 308; the two first connecting blocks 308 are respectively fixedly connected to the two first support columns 303 one-to-one; the two first support columns 303 are respectively slidably installed in the elongated hole, and are respectively located at both ends of the side of the elongated hole near the first pusher cylinder 302; the first guide rail 306 and the second guide rail 307 are each provided with a first permanent magnet 309 along their length direction; the bottom of each of the two first connecting blocks 308 is provided with a second permanent magnet 3010 adapted to the first permanent magnet 309, so that the first connecting blocks can be connected. Block 308 and the second connecting block 3015 are magnetically levitated and mounted above the first guide rail 306 and the second guide rail 307; on the other side of the elongated hole, a third guide rail 3011 and a fourth guide rail 3012 are arranged in parallel from the inside out; two second pusher cylinders 305 are respectively fixedly installed in the middle of the third guide rail 3011 and the fourth guide rail 3012, and the output ends of the two second pusher cylinders 305 are arranged opposite to each other; each output end of the two second pusher cylinders 305 is provided with a second connecting block 3015; the two second connecting blocks 3015 are respectively paired with the two second support columns 304. The connection should be fixed; the two second support columns 304 are slidably installed in the elongated hole and are located at both ends of the elongated hole near the second pusher cylinder 305; the third guide rail 3011 and the fourth guide rail 3012 are each provided with a third permanent magnet 3013 along their length direction; the bottom of the two second connecting blocks 3015 is provided with a fourth permanent magnet 3014 adapted to the third permanent magnet 3013, so that the two second connecting blocks are magnetically suspended above the third guide rail 3011 and the fourth guide rail 3012; the first pusher cylinder 302 and the second pusher cylinder 305 are respectively connected to the control mechanism.

[0024] In this embodiment, as Figure 1-3As shown, two first pusher cylinders 302 and two second pusher cylinders 305 are symmetrically arranged on both sides of the elongated hole. During assembly, the output ends (i.e., piston ends) of the two first pusher cylinders 302 are set to opposite directions so as to synchronously drive the two first support columns 303 to move relative to each other. Similarly, the output ends (i.e., piston ends) of the two second pusher cylinders 305 are also set to opposite directions so as to synchronously drive the two second support columns 304. Relative movement; two first support columns 303 and two second support columns 304 are respectively set on both sides of the two ends of the elongated hole to form two sets of end-opening structures for opening the bag opening of the packaging bag. The gap between the first support column 303 and the second support column 304 located at the same end of the elongated hole is greater than the thickness of the blade 406 of the bag-collecting mechanism 4, so that when the two blades 406 of the bag-collecting mechanism 4 perform the bag-collecting action, they respectively pass through the gap between the two sets of opening structures to perform a contraction action, so as to cooperate with the two sets of opening structures to realize the M-shaped folding operation of the bag opening of the packaging bag. The structure is stable and easy to install. At the same time, using the principle of like poles repelling and unlike poles attracting, corresponding permanent magnets are set on the connecting block and the guide rail connected to the supporting column, so that the connecting block is magnetically levitated and installed on the guide rail of the fixed plate 301. So that when the bag is opened, the friction between the connecting block and the guide rail will cause the generation of foreign objects, thereby affecting the product production quality.

[0025] Further, the bag-collecting mechanism 4 includes: a first support frame 401, a drive motor 402, a ball screw 403, two ball nuts 404, two connecting seats 405, and two blades 406; the first support frame 401 is fixedly connected to the output end of the drive mechanism 5; the first support frame 401 is fixedly connected to the fixing plate 301 through four columns and is located above the fixing plate 301; the ball screw 403 is rotatably mounted on the first support frame 401; the drive motor 402 is fixedly mounted on the first support frame 401, and its output end is connected to the input end of the ball screw 403; the two ball nuts 404 are arranged in a relative state on the output end of the ball screw 403; the bottom of the first support frame 401 is provided with a groove communicating with the elongated hole; the two ball nuts 404 are connected to the output end of the ball screw 403. Nuts 404 are fixedly connected to one end of each of the two connecting seats 405; the bottom of the first support frame 401 is provided with two limiting guide rails on both sides of the slide groove to form a sliding track 407; the other ends of the two connecting seats 405 pass through the slide groove and are placed in the two sliding tracks 407, and are fixedly connected to one end of each of the two blades 406; a plurality of fifth permanent magnets are provided on the inner side of the sliding track 407; a plurality of sixth permanent magnets 409 are provided on the connecting seat 405 corresponding to the plurality of fifth permanent magnets, so that the end of the connecting seat 405 near the blade 406 is magnetically levitated and housed in the sliding track 407; the other ends of the two blades 406 pass through the elongated hole and are placed below the fixing plate 301; the drive motor 402 is electrically connected to the control mechanism.

[0026] In this embodiment, as Figure 1-3As shown, the other ends of the two blades 406 pass through the two ends of the elongated hole and are positioned below the fixing plate 301, and are located within the gap between the two support columns at the same end of the elongated hole; the thickness of the blades 406 is smaller than the gap between the first support column 303 and the second support column 304 in the bag-supporting mechanism 3, so that the blades 406 can pass through the gap between them for folding operation; during assembly, the two ball nuts 404 on the ball screw 403 are mounted on the ball screw 403 in opposite directions and are located at both ends of the output end of the ball screw 403; during operation, the drive motor 402 drives the ball screw 403 to rotate through the transmission belt 4010, thereby driving the two ball nuts 404 on the ball screw 403 to move towards or away from each other, so that the two blades 406 can move towards or away from each other through the connecting seat 405; when performing bag-collecting operation, the drive motor 402 operates. The ball screw 403 rotates forward, which in turn drives the two ball nuts 404 to move relative to each other, thereby moving the two blade seats 406 relative to each other. With the cooperation of the bag support mechanism 3, the bag opening is folded in an M-shape. The operation is convenient and quick. At the same time, by using the principle of like poles repelling and unlike poles attracting, permanent magnets are installed on the bottom of the connecting seat 405 and the two slide rails, respectively, so that the blades 406 are connected to the first support frame 401 in a magnetic levitation manner. This avoids friction between the connecting seat 405 and the slide rail during the bag collection process, which would generate foreign matter and affect the production quality of the product.

[0027] Further, the bag opening mechanism 2 includes: two bag opening arms 21; the two bag opening arms 21 are symmetrically installed on both sides of the frame 1; the operating ends of the two bag opening arms 21 are both located below the fixed plate 301; each bag opening arm 21 includes: a first drive cylinder 2101, a fixed base 2102, a second support frame 2103, a second drive cylinder 2104, a mounting base 2105, and at least one suction cup 2106; the fixed base 2102 is fixedly connected to the frame 1; the first drive cylinder 2101 is mounted on the fixed plate 301. The first drive cylinder 2101 is mounted on the fixed seat 2102, and its output end passes through the fixed seat 2102 and is fixedly connected to the second support frame 2103; the mounting seat 2105 is slidably connected to the second support frame 2103; the second drive cylinder 2104 is mounted on the second support frame 2103, and its output end passes through the second support frame 2103 and is slidably connected to the mounting seat 2105; the suction cup 2106 is mounted on the mounting seat 2105; the first drive cylinder 2101 and the second drive cylinder 2104 are respectively electrically connected to the control mechanism.

[0028] In this embodiment, as Figure 1-5The two bag-opening arms 21 shown are symmetrically arranged on the frame 1. During operation, the two bag-opening arms 21 respectively suck up both ends of the bag opening, and then the bag opening operation is realized by the cooperation of cylinders. The suction cup 2106 is a suction cup 2106 with an external vacuum adsorption device. The working process of the two bag-opening arms 21 is as follows: During operation, the first drive cylinders 2101 on the two bag-opening arms 21 work synchronously to push the second support frame 2103 at its output end to move downward, pushing the two support frames down to both sides of the bag opening of the packaging bag to be folded in an M-shape. Then, the two second drive cylinders 2104 are activated synchronously to push the suction cups 2106 on the two mounting bases 2105 to the bag opening of the packaging bag and suck up both ends of the bag opening. Then, the two second push cylinders 305 retract synchronously to realize the bag opening operation. The operation is convenient and quick.

[0029] Furthermore, the driving mechanism 5 includes: a third driving cylinder 501 and a mounting plate 502; the cylinder is mounted on the frame 1, and its output end is fixedly connected to the mounting plate 502; the mounting plate 502 is fixedly connected to the first support frame 401; the mounting plate is slidably connected to the frame 1 through four guide columns; the third driving cylinder 501 is electrically connected to the control mechanism; specifically, during operation, the third driving cylinder 501 drives the mounting plate 502 to move up and down, thereby realizing the up and down reciprocating movement of the bag collecting mechanism 4 and the bag supporting mechanism 3, which has a stable structure and is easy to install.

[0030] This utility model discloses a fully automatic M-type folding machine with a stable overall structure and convenient installation. It can realize fully automatic M-type folding operation of packaging bag opening, effectively improving production and processing efficiency and reducing labor costs. At the same time, the support column of the bag supporting mechanism 3 and the blade 406 of the bag opening mechanism 2 are assembled by magnetic levitation, which can avoid the metal friction generated during the M-type bag opening folding process, which can cause foreign object contamination and lead to product quality problems.

[0031] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A fully automatic M-type folding machine, characterized in that, include: frame; The frame is equipped with an opening mechanism for opening the packaging bag, a bag-supporting mechanism for further expanding the opening of the opened packaging bag, a bag-closing mechanism for folding the opening of the expanded packaging bag into an M-shaped structure in cooperation with the bag-supporting mechanism, a drive mechanism for driving the bag-supporting mechanism and the bag-closing mechanism to move up and down synchronously, and a control mechanism; the control mechanism is electrically connected to the opening mechanism, the bag-supporting mechanism, the bag-closing mechanism and the drive mechanism respectively.

2. The fully automatic M-type folding machine according to claim 1, characterized in that, The bag-supporting mechanism includes: a fixed plate, two first pusher cylinders, two first support columns, two second support columns, and two second pusher cylinders; the fixed plate is fixedly connected to the bag-collecting mechanism; a square elongated hole is provided on the fixed plate along its length; a first guide rail and a second guide rail are arranged in parallel from the inside to the outside on one side of the elongated hole; Two first pusher cylinders are fixedly installed in the middle of the first guide rail and the second guide rail respectively, and the output ends of the two first pusher cylinders are arranged opposite to each other; each output end of the first pusher cylinder is provided with a first connecting block; the two first connecting blocks are fixedly connected to the two first support columns respectively; the two first support columns are slidably installed in the elongated hole and are located at both ends of the side of the elongated hole near the first pusher cylinder; a first permanent magnet is provided on the first guide rail and the second guide rail along their length direction; a second permanent magnet adapted to the first permanent magnet is provided at the bottom of the two first connecting blocks, so that the two first connecting blocks are magnetically levitated above the first guide rail and the second guide rail respectively. On the other side of the elongated hole, a third guide rail and a second guide rail are arranged in parallel from the inside out. Two second pusher cylinders are fixedly installed in the middle of the third and fourth guide rails respectively, with their output ends facing away from each other. Each output end of the second pusher cylinder is provided with a second connecting block. The two second connecting blocks are fixedly connected to the two second support columns respectively. The two second support columns are slidably installed in the elongated hole and are located at both ends of the side of the elongated hole closest to the second pusher cylinder. A third permanent magnet is provided on the third and fourth guide rails along their length. A fourth permanent magnet adapted to the third permanent magnet is provided at the bottom of each of the two second connecting blocks, so that the two second connecting blocks are magnetically levitated above the third and fourth guide rails respectively. The first and second pusher cylinders are respectively connected to the control mechanism.

3. The fully automatic M-type folding machine according to claim 2, characterized in that, The bag-collecting mechanism includes: a first support frame, a drive motor, a ball screw, two ball nuts, two connecting seats, and two blades; the first support frame is fixedly connected to the output end of the drive mechanism; the first support frame is fixedly connected to the fixed plate via four columns and is located above the fixed plate; the ball screw is rotatably mounted on the first support frame; the drive motor is fixedly mounted on the first support frame, and its output end is drively connected to the input end of the ball screw; the two ball nuts are arranged opposite each other on the output end of the ball screw; the two ball nuts are respectively fixedly connected to one end of each of the two connecting seats; the bottom of the first support frame... The first support frame has a groove communicating with the elongated hole; the bottom of the first support frame is provided with two limiting guide rails on both sides of the groove to form a sliding track; the other ends of the two connecting seats pass through the groove and are placed in the two sliding tracks, and are respectively fixedly connected to one end of the two blades; a plurality of fifth permanent magnets are provided on the inner side of the sliding track; a plurality of sixth permanent magnets corresponding to the plurality of fifth permanent magnets are provided on the connecting seats, so that the end of the connecting seat near the blade is magnetically levitated and housed in the sliding track; the other ends of the two blades pass through the elongated hole and are placed below the fixing plate; the drive motor is electrically connected to the control mechanism.

4. A fully automatic M-type folding machine according to claim 2, characterized in that, The bag-opening mechanism includes: two bag-opening arms; the two bag-opening arms are symmetrically installed on both sides of the frame; the operating ends of both bag-opening arms are located below the fixed plate; each bag-opening arm includes: a first drive cylinder, a fixed base, a second support frame, a second drive cylinder, a mounting base, and at least one suction cup; the fixed base is fixedly connected to the frame; the first drive cylinder is installed on the fixed base, and its output end passes through the fixed base and is fixedly connected to the second support frame; the mounting base is slidably connected to the second support frame; the second drive cylinder is installed on the second support frame, and its output end passes through the second support frame and is slidably connected to the mounting base; the suction cup is installed on the mounting base; the first drive cylinder and the second drive cylinder are electrically connected to the control mechanism respectively.

5. A fully automatic M-type folding machine according to claim 3, characterized in that, The drive mechanism includes: a third drive cylinder and a mounting plate; the cylinder is mounted on the frame and its output end is fixedly connected to the mounting plate; the mounting plate is fixedly connected to the first support frame; the mounting plate is slidably connected to the frame through four guide columns; the third drive cylinder is electrically connected to the control mechanism.

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