Air suction device for winding plastic bags

Abstract

The air suction device comprises a conveying component, a winding assembly and a separating assembly, the conveying component comprises a conveying frame and a conveying belt arranged on the conveying frame, the conveying and winding assembly comprises a connecting rotating shaft, a rotating disc and a winding rod, and a supporting frame is arranged on one side of the conveying frame; the connecting rotating shaft is horizontally and rotatably arranged on the supporting frame, the rotating disc is vertically arranged on the connecting rotating shaft, the multiple winding rods are arranged on the rotating disc in the circumferential direction and arranged above the conveying belt, a feeding station is arranged on the supporting frame, the winding station separation assembly is arranged on the conveying frame, and the separation assembly comprises a rotating plate and an air blowing box. The rotating plate is rotationally arranged on the conveying frame, one end of the rotating plate is connected with the blowing box, a blowing through hole is formed in the side, close to the conveying belt, of the blowing box, and an air source is arranged on the blowing box in a communicating mode. The plastic bag winding device has the effect of improving the plastic bag winding and production efficiency.

Description

Technical Field

[0001] This application relates to the technical field of plastic bag production, and in particular to an air suction device for rolling up plastic bags. Background Technology

[0002] Rolling up plastic bags is a core process in the later stages of the entire plastic bag processing flow. The rolling process at the finished product end is the last critical step before the plastic bag is formed, and it is adapted to the processing flow of different types of plastic bags (flat bags, vest bags, roll bags).

[0003] Currently, Chinese patent CN120004045A discloses a winding device for producing plastic self-sealing bags. In the prior art, an electrostatic adsorption roller is used to adsorb the plastic bag, so that the plastic bag adheres to the roller. The rotating electrostatic adsorption roller drives the plastic bag to rotate, thereby realizing the winding of the plastic bag.

[0004] However, the electrostatic adsorption roller operates under harsh environmental conditions. Moisture and impurities on the surface of the plastic bag can reduce the electrostatic adsorption strength, potentially preventing the plastic bag from being completely adsorbed by the roller. Furthermore, electrostatic adhesion can occur on the plastic bag, requiring subsequent static removal. This adds to the processing steps and reduces efficiency and effectiveness. Summary of the Invention

[0005] In order to improve the winding and production efficiency of plastic bags, this application provides an air suction device for winding plastic bags.

[0006] The air suction device for rolling up plastic bags provided in this application adopts the following technical solution: A suction device for rolling up plastic bags includes a conveying component, a winding assembly, and a separating assembly. The conveying component includes a conveyor frame and a conveyor belt mounted on the conveyor frame. The conveying and winding assembly includes a connecting shaft, a rotating disk, and winding rods. A support frame is provided on one side of the conveyor frame. The connecting shaft is horizontally rotatably mounted on the support frame. The rotating disk is vertically mounted on the connecting shaft. Several winding rods are horizontally arranged at equal angular intervals along the circumference of the rotating disk. The winding rods are positioned above the conveyor belt. The support frame has, in a clockwise direction, a loading station, a winding station, a unloading station, and a preparation station corresponding to the winding rods. The loading station and the winding station are respectively arranged corresponding to the top surface of the conveyor belt. The support frame is provided with a driving component for driving the connecting shaft to rotate. The separation component is arranged on the conveyor frame. The separation component includes a rotating plate and an air blowing box. The rotating plate is rotatably arranged on the conveyor frame. One end of the rotating plate extends above the conveyor belt and is connected to the air blowing box. The air blowing box is arranged parallel to the winding rod. The position of the air blowing box corresponds to the position of the loading station. The side of the air blowing box near the conveyor belt has several air blowing holes. An air source is connected to the air blowing box. The conveyor frame is provided with a driving component for driving the rotating plate to rotate.

[0007] By adopting the above technical solution, the continuous operation of the plastic bag production winding process is achieved through the cooperation of the conveying component, the winding component, and the separating component, which improves the winding and production efficiency of plastic bags.

[0008] Optionally, the support frame is provided with a negative pressure assembly, which includes an air receiving cylinder, a connecting air nozzle, and a negative pressure air source. The air receiving cylinder is laterally slidably disposed on the support frame and is located at the loading station of the support frame. The axial direction of the air receiving cylinder is parallel to the axial direction of the winding rod. The connecting air nozzle is connected to the end of the air receiving cylinder away from the winding rod, and the end of the connecting air nozzle away from the air receiving cylinder is connected to the negative pressure air source. The support frame is provided with a driving component for driving the air receiving cylinder to move along its axial direction. The winding rod is hollow inside, and the end of the winding rod near the support frame is open. The winding rod has several suction holes that communicate with its inner cavity.

[0009] Optionally, the support frame is provided with a drive assembly, which includes drive pulleys and drive belts. Several drive pulleys are rotatably arranged on the side of the support frame near the conveyor frame. The drive belt is simultaneously driven and sleeved on the outside of several drive pulleys. The support frame is provided with a drive source for driving the drive pulleys to rotate. One end of the take-up bar is connected to a rotating pulley. Several rotating pulleys and several drive pulleys are located on the same vertical plane. When the rotating disk rotates to the point where the two take-up bars correspond one-to-one with the feeding station and the take-up station, the rotating pulleys at the feeding station and the take-up station are fitted against the outer side of the drive belt.

[0010] Optionally, the unloading station of the support frame is provided with an unloading assembly, which includes an unloading spinning cylinder and a spinning push plate. The unloading spinning cylinder is horizontally arranged on the support frame, and the output shaft of the unloading spinning cylinder is arranged parallel to the winding rod. The spinning push plate is vertically driven connected to the output shaft of the unloading spinning cylinder, and the spinning push plate is provided with a clearance arc groove for accommodating the winding rod.

[0011] Optionally, the winding rod includes a winding section and a feeding section. The winding section is disposed on the rotating disk, and the feeding section is coaxially disposed at the end of the winding section away from the support frame. The diameter of the feeding section decreases along the direction away from the support frame.

[0012] Optionally, the air blowing box has a receiving arc groove on the side near the conveyor belt for accommodating the winding rod, and a filter screen is provided in the air blowing box, which covers several of the air blowing holes.

[0013] Optionally, the rotating disk is provided with a thickness detection component, and several sets of the thickness detection component are arranged on the rotating disk. The several sets of thickness detection components are arranged one-to-one with several of the winding rods. The thickness detection component includes a detection slide rod and an infrared sensor. The detection slide rod is horizontally connected to the side of the rotating disk near the conveyor belt. The detection slide rod is arranged parallel to the winding rod. The detection slide rod and the corresponding winding rod are arranged at intervals. One infrared sensor is provided on the side of each detection slide rod away from the rotating disk.

[0014] Optionally, the rotating disk has a plurality of adjusting grooves along the radial direction, and the plurality of adjusting grooves are arranged in a one-to-one correspondence with a plurality of detection slide rods. An adjusting slider is slidably arranged in each adjusting groove, and the adjusting slider is connected to the corresponding detection slide rod. The rotating disk is provided with an adjusting component for adjusting the position of the adjusting slider.

[0015] In summary, this application includes at least one of the following beneficial technical effects: By cooperating with the conveying components, winding components, and separating components, the continuous winding process of plastic bag production is achieved, which improves the winding and production efficiency of plastic bags. The thickness detection component enables the detection of the thickness of the wound plastic bag roll, facilitating the timely cutting of plastic bags that meet the required winding thickness. The feeding component enables timely feeding of the completed plastic bag rolls, achieving continuous production of plastic bag rolls by the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the structure of an air suction device for rolling up a plastic bag, as described in this application.

[0017] Figure 2 This is a schematic diagram illustrating the structure of the winding assembly in the embodiments of this application.

[0018] Figure 3 yes Figure 2 Enlarged view of section B in the middle.

[0019] Figure 4 This is a structural schematic diagram illustrating the negative pressure component in the embodiments of this application.

[0020] Figure 5 yes Figure 4 Enlarged view of section C.

[0021] Figure 6 yes Figure 1 Enlarged view of part A in the middle.

[0022] Explanation of reference numerals in the attached drawings: 1. Support frame; 2. Rewinding assembly; 21. Connecting shaft; 22. Rotating disc; 221. Adjusting slide; 23. Rotating pulley; 24. Rewinding rod; 241. Air extraction hole; 242. Rewinding section; 243. Unloading section; 3. Thickness detection assembly; 31. Infrared sensor; 32. Detection slide; 33. Adjusting slider; 34. Adjusting screw; 35. Rotating lever; 4. Separation assembly; 41. Connecting frame; 42. Rotating plate; 43. Air blowing box; 431. Receiving arc groove; 43 2. Air inlet; 433. Air blowing hole; 434. Filter screen; 44. Pressing plate; 45. Rotating shaft; 5. Drive assembly; 51. Drive pulley; 53. Drive ring belt; 6. Negative pressure assembly; 61. Air inlet cylinder; 62. Connecting air nozzle; 63. Fixing base; 64. Extension plate; 65. Connecting pipe; 66. Negative pressure air source; 67. Drive cylinder; 7. Feeding assembly; 71. Feeding spinning cylinder; 72. Spinning push plate; 721. Clearance arc groove; 73. Feeding inclined plate; 8. Conveyor frame; 9. Conveyor belt. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-6 This application will be further described in detail below. Embodiments of this application provide a suction device for winding plastic bags, which improves the winding efficiency of plastic bags and increases production efficiency.

[0024] Reference Figure 1 and Figure 2 A suction device for rolling up plastic bags includes a support frame 1, a winding assembly 2, a thickness detection assembly 3, a separation assembly 4, a drive assembly 5, a negative pressure assembly 6, and a feeding assembly 7. The support frame 1 is vertically arranged, and a conveyor frame 8 for conveying plastic bags is arranged next to the support frame 1. A conveyor belt 9 is arranged on the conveyor frame 8, and a drive source for driving the conveyor belt 9 to rotate is arranged on the conveyor frame 8.

[0025] Reference Figure 1 and Figure 2 The winding assembly 2 is mounted on the support frame 1. The winding assembly 2 includes a connecting shaft 21, a rotating disk 22, a rotating pulley 23, and winding rods 24. The connecting shaft 21 is horizontally rotatable on the support frame 1, and the support frame 1 is equipped with a drive source for driving the connecting shaft 21 to rotate. The rotating disk 22 is vertically mounted on the side of the support frame 1 near the conveyor belt 9, and the connecting shaft 21 is connected to the center point of the rotating disk 22. Four winding rods 24 are rotatably mounted at equal angular intervals along the circumference of the rotating disk 22 on the side near the conveyor belt 9. Several winding rods 24 are located above the conveyor belt 9, and are arranged along the width direction of the conveyor belt 9. The support frame 1 has a loading station, a winding station, an unloading station, and a preparation station arranged clockwise along the circumference of the rotating disk 22. When the turntable 22 rotates to a certain angle, the four winding rods 24 are set in a horizontal direction corresponding to the loading station, winding station, unloading station and preparation station. The loading station and winding station are both set in a horizontal direction corresponding to the top surface of the conveyor belt 9.

[0026] Reference Figure 2-4 The separation component 4 is mounted on the conveyor frame 8 and includes a connecting frame 41, a rotating plate 42, an air blowing box 43, a pressing plate 44, and a rotating shaft 45. The connecting frame 41 is mounted on the conveyor frame 8, and one rotating plate 42 is rotatably mounted at each end of the length of the connecting frame 41. The air blowing box 43 is positioned above the conveyor belt 9 along its width, and its position corresponds to the loading station position on the support plate. Both ends of the air blowing box 43 correspond one-to-one with the two rotating plates 42 and are connected via connectors. A rotating shaft 45 is horizontally mounted on the connecting frame 41 along the width of the conveyor belt 9, and the rotating shaft 45 is connected to both rotating plates 42. A drive source for driving the rotating shaft 45 is mounted on the connecting frame 41.

[0027] Reference Figure 1 , Figure 3 and Figure 4 The air blowing box 43 has a receiving groove 431 on the side near the top surface of the conveyor belt 9 to accommodate the take-up rod 24. The radius of the receiving groove 431 is larger than the radius of the take-up rod 24. An air inlet 432 communicating with its inner cavity is provided at the end of the air blowing box 43. During use, an air source is connected to the air inlet 432. Several air blowing holes 433 communicating with its inner cavity are obliquely opened on the side of the air blowing box 43 near the conveyor belt 9. The opening ends of the air blowing holes 433 are obliquely oriented towards the take-up rod 24 located at the loading station. A filter screen 434 is provided in the air blowing box 43, which also covers the air blowing holes 433. A pressing plate 44 is connected to the air blowing box 43 via a connector. A contact slope is provided on the bottom edge of the pressing plate 44 near the conveyor belt 9.

[0028] Reference Figure 2 The drive assembly 5 is located on the side of the support frame 1 near the conveyor frame 8. The drive assembly 5 includes drive pulleys 51 and drive belts 53. Several drive pulleys 51 are rotatably connected to the support frame 1 near the conveyor frame 8, and the drive belts 53 are simultaneously driven and sleeved on the outside of several drive pulleys 51. The support frame 1 is provided with a drive source that is driven and connected to one of the drive pulleys 51. Each take-up bar 24 has a rotating pulley 23 fixedly sleeved on one end near the rotating disk 22. The rotating pulleys 23 located at the loading station and the take-up station are all pressed against and driven and connected to the outside of the drive belts 53.

[0029] Reference Figure 4 and Figure 5 The negative pressure assembly 6 is mounted on the support plate and includes an air inlet 61, a connecting nozzle 62, a fixed base 63, an extension plate 64, a connecting pipe 65, and a negative pressure air source 66. The inner cavity of the winding rod 24 is hollow, and several air extraction holes 241 communicating with its inner cavity are opened on the winding rod 24. The end of the winding rod 24 near the support frame 1 is open. The air inlet 61 extends horizontally through the support frame 1 and is slidably connected to it. The air inlet 61 is mounted on the loading station of the support frame 1. The end of the air inlet 61 away from the rotating disk 22 is connected to the connecting nozzle 62. The fixed base 63 is located on the side of the support plate away from the conveyor frame 8. A drive cylinder 67 is mounted on the fixed base 63. The output shaft of the drive cylinder 67 extends horizontally toward the support frame 1 and is parallel to the air inlet 61. The extension plate 64 is connected to the output shaft of the drive cylinder 67 and is connected to the air inlet 61. One end of the connecting pipe 65 is connected to the connecting nozzle 62, and the other end is connected to the negative pressure air source 66.

[0030] Reference Figure 1 and Figure 2The unloading assembly 7 is installed on the unloading station of the support frame 1. The unloading assembly 7 includes an unloading spinning cylinder 71, a spinning push plate 72, and an unloading inclined plate 73. The cylinder of the unloading spinning cylinder 71 is horizontally connected to the side of the support frame 1 near the conveyor frame 8, and the output shaft of the unloading spinning cylinder 71 extends horizontally and is connected to the spinning push plate 72 for transmission. The spinning push plate 72 is vertically arranged and parallel to the support frame 1. The spinning push plate 72 is provided with a clearance arc groove 721 for accommodating the take-up rod 24 at the unloading station. The take-up rod 24 includes a take-up section 242 and an unloading section 243. The take-up section 242 is connected to the rotating disk 22, and the unloading section 243 is coaxially arranged at the end of the take-up rod 24 away from the support frame 1. The end of the unloading section 243 connected to the take-up section 242 has the same diameter as the take-up section 242, and the diameter of the unloading section 243 gradually decreases along the direction away from the support frame 1. The unloading ramp 73 is inclined and set on the side of the conveyor belt 9 away from the support frame 1. The top of the unloading ramp 73 is set in the same horizontal direction as the unloading station of the support frame 1.

[0031] Reference Figure 1 and Figure 6 Several sets of thickness detection components 3 are arranged on the rotating disk 22, with each set corresponding to a number of take-up rods 24. Each thickness detection component 3 includes an infrared sensor 31, a detection slide bar 32, an adjusting slider 33, an adjusting screw 34, and a rotating block 35. Several adjusting grooves 221 are formed along the radial direction of the rotating disk 22, each corresponding to a number of take-up rods 24. One adjusting slider 33 is slidably disposed in each adjusting groove 221. One detection slide bar 32 is connected to each adjusting slider 33. The detection slide bar 32 is located on the side of the rotating disk 22 near the conveyor frame 8 and is parallel to the take-up rod 24. The detection slide bars 32 and take-up rods 24 are spaced apart. One infrared sensor 31 is located at the end of the detection slide bar 32 furthest from the rotating disk 22. One adjusting screw 34 is disposed along the length direction of each adjusting groove 221, and the adjusting screw 34 is threadedly connected to the adjusting slider 33. The rotating block 35 is connected to one end of the adjusting screw 34, and a part of the rotating block 35 extends out of the adjusting groove 221.

[0032] Reference Figure 1 , Figure 3 and Figure 5During the plastic bag winding operation, the plastic bag is placed on the conveyor belt 9 for conveying. When the disconnected plastic bag moves to the loading station, the open end of the winding rod 24 located at the loading station is coaxially aligned with the air receiving cylinder 61. The output shaft of the drive cylinder 67 extends and drives the air receiving cylinder 61 to move towards the winding rod 24 near the unloading station until the winding rod 24 is connected to the air receiving cylinder 61. The negative pressure air source 66 is activated, drawing air through several suction holes 241 on the winding rod 24. At the same time, the air source connected to the blowing box 43 is activated, and the blowing box 43 blows air onto the top surface of the conveyor belt 9 through several blowing holes 433. The filter screen 434 reduces the possibility of impurities and dust in the blowing box 43 being blown onto the plastic bag by the airflow, affecting its production quality. Under the combined action of the blowing air from the blowing box 43 and the suction air from the winding rod 24, the end of the plastic bag is quickly adsorbed onto the winding rod 24 at the loading station. The drive source starts, causing the drive pulley 51 and drive belt 53 to rotate. The rotating pulley 23 at the loading station abuts against the drive belt 53, and the rotating pulley 23 and the take-up rod 24 rotate synchronously. The rotating pulley 23 drives the plastic bags adsorbed on it to continuously wind around the take-up rod 24 at the loading station. When the plastic bags on the take-up rod 24 have been wound a certain number of times, the connecting shaft 21 rotates 90° under the drive of the drive source. At this time, the air blowing box 43 rotates to a vertical position away from the conveyor belt 9 under the drive of the drive source to avoid obstructing the rotation of the take-up rod 24. The rotating disk 22 drives the take-up rod 24, which was originally located at the loading station, to the take-up station. At this time, the rotating pulley 23 is always in transmission contact with the drive belt 53 and rotates, driving the take-up rod 24 at the take-up station to continuously wind up the plastic bags.

[0033] Reference Figure 6 An infrared sensor 31 mounted on the detection slide bar 32 detects the thickness of the rolled plastic bag. When the plastic bag is wound to the point where it blocks the infrared sensor 31, it indicates that the thickness of the plastic bag roll has reached the specified standard. At this time, the rotating shaft 45 rotates under the drive of the drive source, causing the air blowing box 43 to move towards the top surface of the conveyor belt 9 until it is pressed against the conveyor belt 9. The pressing plate 44 connected to the air blowing box 43 presses against the plastic bag. Since the conveyor belt 9 is still continuously conveying, the plastic bag with the break point is torn off under the action of friction, realizing the automatic separation of the break point plastic bag. The plastic bag at the winding station completes the winding operation, so that the device can start the winding operation of the next roll of plastic bag. The end of the plastic bag at the feeding station repeats the above operation, adsorbing onto the winding rod 24 at the feeding station for winding.

[0034] Reference Figure 1 , Figure 6To accommodate different plastic bag roll thickness requirements, the distance between the detection slide bar 32 and the winding bar 24 can be adjusted. Turning the dial 35 rotates the adjusting screw 34, causing the adjusting slider 33 to move within the adjusting groove 221 under the limit of the adjusting groove 221 and the drive of the adjusting screw 34. This allows for adjustment of the distance between the winding bar 24 and the detection slide bar 32, expanding the applicability of the device. Once the plastic bag roll is wound up, it rotates with the winding bar 24 to the unloading station. The unloading spinning cylinder 71 is activated, first rotating the spinning push plate 72 until the winding shaft is embedded in the clearance arc groove 721. At this point, the spinning push plate 72 is located on the side of the plastic bag roll away from the unloading inclined plate 73. The unloading spinning cylinder 71 is activated, driving the spinning push plate 72 to move along the axial direction of the winding rod 24, pushing the plastic strip roll off the winding rod 24. The pushed-off plastic bag roll falls onto the unloading inclined plate 73 and slides along the unloading inclined plate 73 to perform the unloading operation. The diameter of the unloading section 243 gradually shortens in the direction away from the support frame 1, which facilitates the separation of the plastic bag roll from the winding rod 24 during the unloading process. After the unloading operation of the plastic bag roll is completed, the rotating disk 22 continues to rotate 90°, and the empty winding rod 24 rotates to the preparation position to prepare for the next round of winding processing.

[0035] Reference Figure 1 By setting up a feeding station, a winding station, a unloading station, and a preparation station, the feeding, winding, cutting, and unloading operations of plastic bags are carried out synchronously and continuously without interruption, which helps to improve the winding efficiency of plastic bags and reduce the labor intensity of workers.

[0036] The implementation principle of the suction device for rolling up plastic bags in this embodiment is as follows: When rolling up the plastic bag, the plastic bag is conveyed on the conveyor belt 9, and the winding rod 24 is connected to the air receiving cylinder 61. The negative pressure air source 66 is activated, and air is drawn through several air extraction holes 241 on the winding rod 24. At the same time, the air blowing box 43 blows air onto the top surface of the conveyor belt 9 through the air blowing holes 433. Under the combined action of the air blowing from the air blowing box 43 and the suction of the winding rod 24, the end of the plastic bag is quickly adsorbed onto the winding rod 24. When the plastic bag on the winding rod 24 is wound a certain number of times, the connecting shaft 21 rotates 90°, and the rotating disk 22 drives the winding rod 24, which was originally located at the loading station, to the winding station. The winding rod 24 at the winding station continues to roll up the plastic bag.

[0037] Infrared sensor 31 detects the thickness of the rolled plastic bag. When the thickness of the plastic bag roll reaches the specified standard, the pressing plate 44 connected to the air blowing box 43 presses against the plastic bag, and the plastic bag is torn apart under the action of friction, realizing the automatic separation of the broken plastic bag. The end of the plastic bag located at the feeding station repeats the above operation and is adsorbed onto the winding rod 24 at the feeding station for winding.

[0038] By setting up a feeding station, a winding station, a unloading station, and a preparation station, the feeding, winding, cutting, and unloading operations of plastic bags are carried out synchronously and continuously without interruption, which helps to improve the winding efficiency of plastic bags and reduce the labor intensity of workers.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A suction device for rolling up plastic bags, characterized in that: The system includes a conveying component, a winding assembly (2), and a separating assembly (4). The conveying component includes a conveyor frame (8) and a conveyor belt (9) mounted on the conveyor frame (8). The conveying and winding assembly (2) includes a connecting shaft (21), a rotating disk (22), and winding rods (24). A support frame (1) is provided on one side of the conveyor frame (8). The connecting shaft (21) is horizontally rotatably mounted on the support frame (1). The rotating disk (22) is vertically mounted on the connecting shaft (21). Several winding rods (24) are horizontally arranged at equal angular intervals along the circumference of the rotating disk (22). The winding rods (24) are positioned above the conveyor belt (9). The support frame (1) is arranged clockwise with a loading station, a winding station, a unloading station, and a preparation station corresponding to several winding rods (24). The loading station and the winding... The winding station is arranged corresponding to the top surface of the conveyor belt (9). The support frame (1) is provided with a driving component for driving the connecting shaft (21) to rotate. The separation component (4) is arranged on the conveyor frame (8). The separation component (4) includes a rotating plate (42) and an air blowing box (43). The rotating plate (42) is rotatably arranged on the conveyor frame (8). One end of the rotating plate (42) extends above the conveyor belt (9) and is connected to the air blowing box (43). The air blowing box (43) is arranged parallel to the winding rod (24). The position of the air blowing box (43) corresponds to the position of the loading station. The side of the air blowing box (43) near the conveyor belt (9) is provided with several air blowing holes (433). An air source is connected to the air blowing box (43). The conveyor frame (8) is provided with a driving component for driving the rotating plate (42) to rotate.

2. The air suction device for rolling up plastic bags according to claim 1, characterized in that: A negative pressure assembly (6) is provided on the support frame (1). The negative pressure assembly (6) includes an air receiving cylinder (61), a connecting air nozzle (62), and a negative pressure air source (66). The air receiving cylinder (61) is slidably disposed on the support frame (1) and is located at the loading station of the support frame (1). The axial direction of the air receiving cylinder (61) is parallel to the axial direction of the winding rod (24). The connecting air nozzle (62) and the air receiving cylinder (61) are located away from the winding rod. One end of (24) is connected to the air inlet (62), and the end of the air inlet (62) away from the air inlet (61) is connected to the negative pressure air source (66). The support frame (1) is provided with a driving member for driving the air inlet (61) to move along its axial direction. The inside of the winding rod (24) is hollow. The end of the winding rod (24) near the support frame (1) is open. The winding rod (24) has several air extraction holes (241) connected to its inner cavity.

3. The air suction device for rolling up plastic bags according to claim 1, characterized in that: A drive assembly (5) is provided on the support frame (1). The drive assembly (5) includes drive pulleys (51) and drive belts (53). Several drive pulleys (51) are rotatably arranged on the side of the support frame (1) near the conveyor frame (8). The drive belts (53) are simultaneously driven and sleeved on the outside of several drive pulleys (51). A drive source for driving the drive pulleys (51) to rotate is provided on the support frame (1). One end of the winding rod (24) is connected to a rotating pulley (23). Several rotating pulleys (23) and several drive pulleys (51) are located on the same vertical plane. When the rotating disk (22) rotates to the point where two winding rods (24) correspond one-to-one with the loading station and the winding station, the rotating pulleys (23) on the loading station and the winding station are fitted to the outside of the drive belts (53).

4. The air suction device for rolling up plastic bags according to claim 1, characterized in that: The support frame (1) is provided with a feeding assembly (7) at the feeding station. The feeding assembly (7) includes a feeding spinning cylinder (71) and a spinning push plate (72). The feeding spinning cylinder (71) is horizontally arranged on the support frame (1). The output shaft of the feeding spinning cylinder (71) is arranged parallel to the winding rod (24). The spinning push plate (72) is vertically connected to the output shaft of the feeding spinning cylinder (71). The spinning push plate (72) is provided with a clearance arc groove (721) for accommodating the winding rod (24).

5. The air suction device for rolling up plastic bags according to claim 4, characterized in that: The winding rod (24) includes a winding section (242) and a feeding section (243). The winding section (242) is disposed on the rotating disk (22). The feeding section (243) is coaxially disposed at one end of the winding section (242) away from the support frame (1). The diameter of the feeding section (243) decreases along the direction away from the support frame (1).

6. The air suction device for rolling up plastic bags according to claim 1, characterized in that: The air blowing box (43) has a receiving groove (431) for accommodating the winding rod (24) on one side near the conveyor belt (9). The air blowing box (43) is provided with a filter screen (434) which covers a plurality of the air blowing holes (433).

7. The air suction device for rolling up plastic bags according to claim 1, characterized in that: A thickness detection component (3) is provided on the rotating disk (22). Several sets of the thickness detection component (3) are provided on the rotating disk (22). Several sets of the thickness detection component (3) are provided in correspondence with several winding rods (24). The thickness detection component (3) includes a detection slide rod (32) and an infrared sensor (31). The detection slide rod (32) is horizontally connected to the side of the rotating disk (22) near the conveyor belt (9). The detection slide rod (32) is arranged parallel to the winding rod (24). The detection slide rod (32) and the corresponding winding rod (24) are arranged at intervals. One infrared sensor (31) is provided on the side of each detection slide rod (32) away from the rotating disk (22).

8. The air suction device for rolling up plastic bags according to claim 7, characterized in that: The rotating disk (22) has a plurality of adjusting grooves (221) along the radial direction. The plurality of adjusting grooves (221) are arranged in a corresponding manner to a plurality of detection rods (32). An adjusting slider (33) is slidably arranged in each adjusting groove (221). The adjusting slider (33) is connected to the corresponding detection rod (32). The rotating disk (22) is provided with an adjusting member for adjusting the position of the adjusting slider (33).

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