Feeding device for plastic packaging bag production

Abstract

The invention discloses a feeding device for plastic packaging bag production, which comprises a frame body, a conveying assembly, a disinfection box and a turn-over mechanism, the conveying assembly is arranged on the top face of the frame body, and the disinfection box covers the top face of the frame body. The two ends of the top surface of the frame body are fixedly connected with supporting plates respectively, and the two supporting plates are located in the middle of the disinfection box; the turn-over mechanism comprises a first turn-over mechanism and a second turn-over mechanism, and the first turn-over mechanism and the second turn-over mechanism are arranged on the opposite side walls of the two supporting plates correspondingly; inner supporting mechanisms are arranged at the tops of the two side walls of the two supporting plates; lifting assemblies are arranged on the two supporting plates and used for driving the first turn-over mechanism and the second turn-over mechanism to ascend and descend. The automatic bagging machine is high in automation degree, the production efficiency is greatly improved, a large amount of manpower is saved, the defects that the manual bagging turning-over speed is low and errors are prone to occurring are overcome, the labor cost is effectively reduced, and the disinfection and sterilization effect of the plastic bags is improved.

Description

Technical Field

[0001] The invention relates to the technical field of packaging bag production, and in particular to a feeding device for producing plastic packaging bags. Background Art

[0002] Plastic packaging bags are bags made of plastic as the main raw material and used to package various items. Common materials include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), etc. It has the characteristics of low cost, light weight, good flexibility, moisture and water resistance, easy processing and molding, strong printing adaptability, etc. It can well protect products and extend the shelf life of products. It is widely used in many industries such as food, daily necessities, clothing, electronics, etc. During the production process, plastic packaging bags used in the food industry are susceptible to contamination by microorganisms in the air, residual pollutants in the equipment, and bacteria in the operating environment. Contaminated packaging bags are very likely to directly contaminate food due to contact, especially in the process of automated filling, which will cause batch safety problems. Therefore, during the production process of plastic packaging bags in the food industry, they need to be sterilized.

[0003] After the existing food packaging bags are produced and formed, they will be sent into the ultraviolet disinfection device one by one in an orderly manner with the help of a conveying device to implement the disinfection operation. However, the existing disinfection conveying device of this type is relatively simple in structure, generally composed of an ordinary conveyor belt with a driving mechanism, and its function is limited to achieving basic transmission. When the packaging bag enters the disinfection device, there is an obvious problem of uneven disinfection. For example, the invention patent with the authorization announcement number CN118323748B discloses a feeding device for the production of plastic packaging bags, including a frame, on which a disinfection box and a conveying mechanism are arranged, and the surface of the conveying mechanism is provided with a sleeve mechanism distributed at intervals along the conveying direction, and the sleeve mechanism includes a fixed seat and a sleeve roller. By setting the sleeve mechanism, the conveying mechanism, the gear and the tooth plate, when the sleeve mechanism enters the interior of the disinfection box, the gear moves along the tooth plate and rotates, and the sleeve roller connected to the gear rotates accordingly, thereby driving the packaging bag to rotate, so that the disinfection box can perform all-round disinfection on the packaging bag and improve the disinfection effect.

[0004] The technical solution of the above invention can solve the problem of uneven disinfection of the existing disinfection conveying device, perform all-round disinfection on the packaging bag, and improve the disinfection effect. However, when the device is actually used, the staff needs to continuously and manually put the packaging bag on the roller, which not only consumes a lot of manpower and significantly increases the labor cost, but also the speed of manual putting is relatively slow, which seriously limits the production efficiency and is difficult to meet the high-efficiency requirements of large-scale food packaging production. At the same time, during the manual operation, due to factors such as personnel fatigue and individual differences, it is easy to have irregular putting, resulting in some packaging bags being unable to rotate stably during the disinfection process, thereby affecting the uniformity and effect of disinfection and reducing the stability of product quality.

[0005] Therefore, it is necessary to develop a feeding device for plastic packaging bag production to address the above-mentioned deficiencies. Summary of the Invention

[0006] The purpose of the present invention is to provide a feeding device for plastic packaging bag production, which has a high degree of automation, greatly improves production efficiency, not only saves a large amount of labor, but also avoids the disadvantages of slow speed and easy errors in manual bag sleeving and turning, effectively reduces labor costs, and improves the disinfection and sterilization effect of plastic bags.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions: A feeding device for plastic packaging bag production of the present invention includes a frame body, and also includes a conveying component, a disinfection box and a turning mechanism; the conveying component is arranged on the top surface of the frame body, and the disinfection box covers the top surface of the frame body; both ends of the top surface of the frame body are respectively fixedly connected with support plates, and the two support plates are located in the middle position of the disinfection box; the turning mechanism includes a first turning mechanism and a second turning mechanism, and the first turning mechanism and the second turning mechanism are respectively arranged on the opposite side walls of the two support plates; inner support mechanisms are arranged on the top of both side walls of the two support plates; lifting components are arranged on both support plates, and the lifting components are used to drive the first turning mechanism and the second turning mechanism to lift; Both the first turning mechanism and the second turning mechanism include a connecting plate, the side surface of the connecting plate is fixedly connected with the lifting component, one end of the top surface of the connecting plate is fixedly connected with an electric push rod, the telescopic end of the electric push rod is fixedly connected with a moving plate, a rotating component is arranged on the moving plate, and a vacuum suction cup is arranged on the rotating component; The inner support mechanism includes a mounting plate, the mounting plate is fixedly connected to the top side wall of the support plate, the end of the mounting plate away from the support plate is fixedly connected with a mounting frame, a driving component is arranged on the mounting frame, and the driving component is connected with two support rods.

[0008] Further, the lifting component includes a lead screw, a first motor and a first slider. Chutes are opened on the opposite inner walls of the two support plates, the lead screw is rotatably connected in the chute, the first motor is fixedly connected to the top surface of the support plate, and the output end of the first motor is coaxially fixedly connected with the lead screw; the first slider is threadedly sleeved on the lead screw, and the connecting plate is fixedly connected with the first slider.

[0009] Further, the conveying component includes conveying rollers, a conveyor belt and a second motor. The number of conveying rollers is two, and the two conveying rollers are respectively rotatably connected to both ends of the frame body. The conveyor belt is sleeved on the surfaces of the two conveying rollers, the second motor is fixedly connected to the frame body, and the second motor is in transmission connection with one of the conveying rollers.

[0010] Furthermore, the rotating assembly includes a third motor, a first gear, a second gear, a rotating shaft and a rotating cylinder, and a connecting block; a groove is formed in the moving plate, the third motor is installed in the groove, the first gear is rotatably connected to the side wall of the moving plate, the output end of the third motor is coaxially and fixedly connected to the first gear, the rotating shaft is rotatably connected to one end of the moving plate away from the connecting plate, the second gear is coaxially and fixedly connected to one end of the rotating shaft, and the first gear is meshed with the second gear; the rotating cylinder is fixedly sleeved on the outer wall of the rotating shaft, and the connecting block is fixedly connected to the outer wall of the rotating cylinder; the vacuum suction cup is fixedly connected to the side wall of the connecting block.

[0011] Furthermore, through holes are formed at both ends of the side wall of the connecting plate, and two sliding rods adapted to the through holes are fixedly connected to the side wall of the moving plate close to the connecting plate, and the sliding rods are slidably connected in the through holes.

[0012] Furthermore, the driving assembly includes a fourth motor, the fourth motor is fixedly connected to the mounting plate, slide rails are fixedly connected to the inner bottom surface and the inner top surface of the mounting frame, second sliders are slidably connected to the slide rails, racks are fixedly connected to the opposite side surfaces of the two second sliders, a third gear is rotatably connected to the side wall of the mounting frame, the output end of the fourth motor is coaxially and fixedly connected to the third gear, and the third gear is meshed with the two racks respectively; mounting blocks are fixedly connected to one ends of the two second sliders on different sides, and connecting rods are arranged on the mounting blocks; the two support rods are fixedly connected to the two connecting rods respectively.

[0013] Furthermore, a first limiting hole is formed in the side wall of the mounting block, a second sliding hole adapted to the connecting rod is formed in the mounting block along its length direction, and the connecting rod is slidably connected in the second sliding hole; a plurality of second limiting holes are formed in the side wall of the connecting rod along its length direction, and the connecting rod is fixed in the second sliding hole through a limiting rod passing through the first limiting hole and the second limiting holes.

[0014] Furthermore, the bottom surfaces of the two support rods on each inner support mechanism are at the same height, and the surfaces of the support rods are coated with a silica gel layer.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are: The present invention conveys the plastic packaging bag into the disinfection box through the conveying component, first disinfects and sterilizes one side of the plastic packaging bag, and when the plastic packaging bag moves to the middle position of the disinfection box, the lifting component on the support plate near the bottom of the plastic packaging bag drives the first flipping mechanism to move downward, and cooperates with the rotating component and the vacuum suction cup to suck up the plastic packaging bag on the conveying component. The other side of the plastic packaging bag is sucked by the vacuum suction cup on the second flipping mechanism, and the electric push rods on the first flipping mechanism and the second flipping mechanism are simultaneously contracted to pull the plastic packaging bag open. The plastic packaging bag is then propped open by the inner support mechanism at the top of the support plate, and the disinfection box is cooperated to achieve disinfection and sterilization of the inside of the plastic bag. Then, the plastic packaging bag is loosened by the vacuum suction cup on the first flipping mechanism, and the second flipping mechanism flips the plastic packaging bag 90° and places it on the conveying component, so that the other side of the packaging bag faces the disinfection box, and it is disinfected and sterilized. This achieves full disinfection and sterilization of both sides and the inside of the plastic packaging bag. The entire process is highly automated, greatly improving production efficiency. It not only saves a lot of manpower, but also avoids the drawbacks of slow and error-prone manual bagging and turning over, effectively reducing labor costs and improving the disinfection and sterilization effect of plastic bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a feeding device for producing plastic packaging bags of the present invention; Figure 2 This is a schematic diagram of the internal structure of the sterilization box of the feeding device for producing plastic packaging bags of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the turning mechanism and the inner supporting mechanism of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the lifting assembly of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the turning mechanism of the present invention; Figure 6 Schematic diagram of the top view of the internal support mechanism of the present invention Figure 7 It is a three-dimensional structural schematic diagram of the driving assembly of the present invention; Figure 8 for Figure 7 A partial enlarged view of part A.

[0018] Description of reference numerals: 1, frame body; 2, conveying assembly; 201, conveying roller; 202, conveyor belt; 203, second motor; 3, disinfection box; 4, support plate; 5, turning mechanism; 51, first turning mechanism; 52, second turning mechanism; 501, connecting plate; 502, moving plate; 503, electric push rod; 504, vacuum suction cup; 505, third motor; 506, first gear; 507, second gear; 508, rotating shaft; 509, rotating cylinder; 510, connecting block; 511, first sliding hole; 512, sliding rod; 6, inner support mechanism; 601, mounting plate; 602, mounting frame; 603, support rod; 604, fourth motor; 605, slide rail; 606, second slider; 607, rack; 608, third gear; 609, mounting block; 610, connecting rod; 611, first limiting hole; 612, second sliding hole; 613, limiting rod; 614, second limiting hole; 7, lifting assembly; 701, lead screw; 702, first motor; 703, first slider; 704, chute. Detailed implementation manners

[0019] The core of the present invention is to provide a feeding device for plastic packaging bag production, which has a high degree of automation, greatly improves production efficiency, not only saves a large amount of labor, but also avoids the disadvantages of slow and error-prone manual bag turning, effectively reduces labor costs, and improves the disinfection and sterilization effect of plastic bags.

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] In a specific implementation manner, such as Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown in the figure, it includes a frame body 1, and also includes a conveying component 2, a disinfection box 3 and a turning mechanism 5; the conveying component 2 is arranged on the top surface of the frame body 1, and the disinfection box 3 covers the top surface of the frame body 1; both ends of the top surface of the frame body 1 are fixedly connected with support plates 4, and the two support plates 4 are located at the middle position of the disinfection box 3; the turning mechanism 5 includes a first turning mechanism 51 and a second turning mechanism 52, and the first turning mechanism 51 and the second turning mechanism 52 are respectively arranged on the opposite side walls of the two support plates 4; inner support mechanisms 6 are arranged on the top of both side walls of the two support plates 4; lifting components 7 are arranged on both support plates 4, and the lifting components 7 are used to drive the first turning mechanism 51 and the second turning mechanism 52 to lift; Both the first turning mechanism 51 and the second turning mechanism 52 include a connecting plate 501, the side surface of the connecting plate 501 is fixedly connected with the lifting component 7, one end of the top surface of the connecting plate 501 is fixedly connected with an electric push rod 503, the telescopic end of the electric push rod 503 is fixedly connected with a moving plate 502, a rotating component is arranged on the moving plate 502, and a vacuum suction cup 504 is arranged on the rotating component; The inner support mechanism 6 includes a mounting plate 601, the mounting plate 601 is fixedly connected to the top side wall of the support plate 4, one end of the mounting plate 601 away from the support plate 4 is fixedly connected with a mounting frame 602, a driving component is arranged on the mounting frame 602, and the driving component is connected with two support rods 603.

[0023] It should be noted that several ultraviolet disinfection lamps are fixedly installed on the inner top surface of the disinfection box 3, which is the prior art and will not be elaborated here.

[0024] In a specific embodiment of the present invention, as Figure 4 shown, the lifting component 7 includes a lead screw 701, a first motor 702 and a first slider 703. Chute grooves 704 are opened on the opposite inner walls of the two support plates 4, the lead screw 701 is rotatably connected in the chute grooves 704, the first motor 702 is fixedly connected to the top surface of the support plate 4, and the output end of the first motor 702 is coaxially and fixedly connected with the lead screw 701; the first slider 703 is threadedly sleeved on the lead screw 701, and the connecting plate 501 is fixedly connected with the first slider 703.

[0025] In a specific embodiment of the present invention, as Figure 1 and Figure 2As shown, the conveying assembly 2 includes conveying rollers 201, a conveyor belt 202, and a second motor 203. The number of the conveying rollers 201 is two, and the two conveying rollers 201 are respectively rotatably connected to both ends of the frame 1. The conveyor belt 202 is sleeved on the surfaces of the two conveying rollers 201. The second motor 203 is fixedly connected to the frame 1, and the second motor 203 is in transmission connection with one of the conveying rollers 201.

[0026] In a specific embodiment of the present invention, as Figure 5 shown, the rotating assembly includes a third motor 505, a first gear 506, a second gear 507, a rotating shaft 508, a rotating cylinder 509, and a connecting block 510; a groove is formed in the moving plate 502, the third motor 505 is installed in the groove, the first gear 506 is rotatably connected to the side wall of the moving plate 502, the output end of the third motor 505 is coaxially and fixedly connected to the first gear 506, the rotating shaft 508 is rotatably connected to one end of the moving plate 502 away from the connecting plate 501, the second gear 507 is coaxially and fixedly connected to one end of the rotating shaft 508, and the first gear 506 is meshed with the second gear 507; the rotating cylinder 509 is fixedly sleeved on the outer wall of the rotating shaft 508, and the connecting block 510 is fixedly connected to the outer wall of the rotating cylinder 509; the vacuum suction cup 504 is fixedly connected to the side wall of the connecting block 510.

[0027] By rotating the third motor 505, the first gear 506 is driven to rotate, further driving the meshed second gear 507 to rotate. The second gear 507 drives the rotating shaft 508, the rotating cylinder 509, the connecting block 510, and the vacuum suction cup 504 to rotate, thereby realizing the control of the orientation of the vacuum suction cup 504.

[0028] In a specific embodiment of the present invention, as Figure 5 shown, through holes 511 are formed through both ends of the side wall of the connecting plate 501, and two sliding rods 512 adapted to the through holes 511 are fixedly connected to the side wall of the moving plate 502 close to the connecting plate 501. The sliding rods 512 are slidably connected in the through holes 511.

[0029] By setting like this, when the electric push rod 503 expands and contracts, the sliding rods 512 can linearly move along the through holes 511, ensuring the stable movement track of the moving plate 502.

[0030] In a specific embodiment of the present invention, as Figure 6 、 Figure 7 and Figure 8As shown in the figure, the driving assembly includes a fourth motor 604, the fourth motor 604 is fixedly connected to the mounting plate 601, slide rails 605 are fixedly connected to both the inner bottom surface and the inner top surface of the mounting frame 602, second sliders 606 are slidably connected to the slide rails 605, racks 607 are fixedly connected to the opposite side surfaces of the two second sliders 606, a third gear 608 is rotatably connected to the side wall of the mounting frame 602, the output end of the fourth motor 604 is coaxially and fixedly connected to the third gear 608, and the third gear 608 meshes with the two racks 607 respectively; one ends of the two second sliders 606 on different sides are respectively fixedly connected to mounting blocks 609, and connecting rods 610 are arranged on the mounting blocks 609; the two support rods 603 are respectively fixedly connected to the two connecting rods 610.

[0031] By rotating the fourth motor 604, the third gear 608 can be driven to rotate. When the third gear 608 rotates, it drives the two racks 607 to approach or move away from each other simultaneously, so as to control the distance between the two support rods 603 and expand the plastic packaging bag from its inside.

[0032] Specifically, a first limiting hole 611 is formed in the side wall of the mounting block 609, a second sliding hole 612 adapted to the connecting rod 610 is formed through the mounting block 609 along its length direction, and the connecting rod 610 is slidably connected in the second sliding hole 612; a plurality of second limiting holes 614 are formed in the side wall of the connecting rod 610 along its length direction, and the connecting rod 610 is fixed in the second sliding hole 612 by a limiting rod 613 passing through the first limiting hole 611 and the second limiting holes 614.

[0033] By setting it in this way, the position of the connecting rod 610 on the mounting block 609 can be controlled, and the connecting rod 610 can be fixed on the mounting block 609 by inserting the limiting rod 613 into the first limiting hole 611 and the second limiting holes 614. Thus, the distance between the support rods 603 on the two inner support mechanisms 6 can be adjusted, so that it is applicable to plastic packaging bags of different sizes and the applicability of the device is improved.

[0034] Specifically, the bottom surfaces of the two support rods 603 on each inner support mechanism 6 are at the same height, and a silica gel layer is coated on the surface of the support rod 603.

[0035] By setting it in this way, it can be ensured that the plastic packaging bag is evenly stressed during inner support, so as to fully expand the plastic packaging bag. The setting of the silica gel layer prevents scratching the surface of the bag body.

[0036] Working principle of the present invention: When the feeding device for plastic packaging bag production of the present invention is in use, the plastic packaging bag is placed at one end of the conveyor belt 202 manually or by a machine device, with the open end of the plastic packaging bag facing the side of the second turning mechanism 52. As the conveyor belt 202 moves, the plastic packaging bag is conveyed into the disinfection box 3, and the ultraviolet disinfection lamp on the inner top surface of the disinfection box 3 sterilizes the upward-facing side of the plastic packaging bag.

[0037] When the plastic packaging bag moves to the middle position of the disinfection box 3, the first motor 702 near one side of the bottom end of the plastic packaging bag rotates, driving the connected lead screw 701 to rotate, causing the first slider 703 to move downward. Further, the moving plate 502 and the vacuum suction cup 504 of the first turning mechanism 51 move downward, making the vacuum suction cup 504 of the first turning mechanism 51 away from the vacuum suction cup 504 of the second turning mechanism 52 to avoid affecting the rotation of this vacuum suction cup 504. At the same time, the third motor 505 of the first turning mechanism 51 is started, driving the vacuum suction cup 504 to rotate until it faces the plastic packaging bag on the conveyor belt 202. When the vacuum suction cup 504 contacts the plastic packaging bag, control the vacuum suction cup 504 to suck it. Then control the first motor 702 on this side to reverse, driving the vacuum suction cup 504 of the first turning mechanism 51 and the plastic packaging bag away from the conveyor belt 202 until they are at the same height as the vacuum suction cup 504 of the second turning mechanism 52. At the same time, control the third motor 505 to reverse, driving the vacuum suction cup 504 of the first turning mechanism 51 to rotate 90°, making the vacuum suction cup 504 and the plastic packaging bag in a vertical state with the opening of the plastic packaging bag facing upward. Then control the electric push rods 503 of the first turning mechanism 51 and the second turning mechanism 52 to extend, making the two vacuum suction cups 504 approach each other until the vacuum suction cup 504 of the second turning mechanism 52 contacts the other side of the plastic packaging bag, and control it to suck the other side of the plastic packaging bag. Then control the two electric push rods 503 to shorten to open the opening of the plastic packaging bag. At the same time, start the two first motors 702, driving the turning mechanism 5 to move upward and approach the two inner support mechanisms 6 until the four support rods 603 are inserted into the plastic packaging bag from the top opening of the plastic bag. Then start the fourth motor 604 to adjust the distance between the two support rods 603 on the same side to expand the plastic packaging bag from the inside, cooperating with the disinfection box 3 to disinfect and sterilize the inside of the plastic packaging bag for a certain period of time.

[0038] After the internal disinfection and sterilization of the plastic packaging bag, control the two first motors 702 to drive the turning mechanism 5 to move downward away from the inner support mechanism 6 until the support rod 603 is removed from the plastic packaging bag. Control the two electric push rods 503 to extend, so that the two vacuum suction cups 504 approach each other until the opening of the plastic packaging bag is closed. Then control the vacuum suction cup 504 of the first turning mechanism 51 to release the plastic packaging bag, start the first motor 702 on one side of the second turning mechanism 52, drive the vacuum suction cup 504 of the second turning mechanism 52 to move downward, and at the same time start the third motor 505 of the second turning mechanism 52 to rotate, driving the vacuum suction cup 504 of the second turning mechanism 52 to rotate 90°, so that it faces the conveyor belt 202. Control the vacuum suction cup 504 to release the plastic packaging bag, so that it falls on the conveyor belt 202, thereby realizing the turning of the plastic packaging bag and disinfecting and sterilizing the other side of the plastic packaging bag.

[0039] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts between the various embodiments, reference can be made to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0040] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention. Various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A feeding device for producing plastic packaging bags, comprising a frame (1), characterized in that: It also comprises a conveying assembly (2), a disinfection box (3) and a turning mechanism (5); the conveying assembly (2) is arranged on the top surface of the frame (1), and the disinfection box (3) cover is arranged on the top surface of the frame (1); the two ends of the top surface of the frame (1) are respectively fixedly connected with support plates (4), and the two support plates (4) are located in the middle of the disinfection box (3); the turning mechanism (5) comprises a first turning mechanism (51) and a second turning mechanism (52), and the first turning mechanism (51) and the second turning mechanism (52) are respectively arranged on the side walls directly facing the two support plates (4); the tops of the two side walls of the two support plates (4) are both provided with inner support mechanisms (6); the two support plates (4) are both provided with lifting assemblies (7), and the lifting assemblies (7) are used to drive the first turning mechanism (51) and the second turning mechanism (52) to rise and fall; The first flipping mechanism (51) and the second flipping mechanism (52) both comprise a connecting plate (501), the side surface of the connecting plate (501) being fixedly connected to the lifting assembly (7), one end of the top surface of the connecting plate (501) being fixedly connected to an electric push rod (503), the telescopic end of the electric push rod (503) being fixedly connected to a moving plate (502), the moving plate (502) being provided with a rotating assembly, and the rotating assembly being provided with a vacuum suction cup (504); The inner support mechanism (6) comprises a mounting plate (601), wherein the mounting plate (601) is fixedly connected to the top side wall of the support plate (4), and an end of the mounting plate (601) away from the support plate (4) is fixedly connected to a mounting frame (602), wherein a driving assembly is arranged on the mounting frame (602), and the driving assembly is connected to two support rods (603).

2. The feeding device for producing plastic packaging bags according to claim 1, characterized in that: The lifting assembly (7) comprises a lead screw (701), a first motor (702) and a first slider (703); a slide groove (704) is provided on the inner walls of the two support plates (4) facing each other; the lead screw (701) is rotatably connected in the slide groove (704); the first motor (702) is fixedly connected to the top surface of the support plate (4); the output end of the first motor (702) is coaxially fixedly connected to the lead screw (701); the first slider (703) is threadedly sleeved on the lead screw (701); and the connecting plate (501) is fixedly connected to the first slider (703).

3. The feeding device for producing plastic packaging bags according to claim 1, characterized in that: The conveying assembly (2) comprises a conveying roller (201), a conveying belt (202) and a second motor (203); the number of the conveying rollers (201) is two, the two conveying rollers (201) are rotatably connected to two ends of the frame (1) respectively, the conveying belt (202) is sleeved on the surfaces of the two conveying rollers (201), the second motor (203) is fixedly connected to the frame (1), and the second motor (203) is drivingly connected to one of the conveying rollers (201).

4. The feeding device for producing plastic packaging bags according to claim 1, characterized in that: The rotating assembly comprises a third motor (505), a first gear (506), a second gear (507), a rotating shaft (508), a rotating drum (509) and a connecting block (510); a groove is provided on the movable plate (502), the third motor (505) is installed in the groove, the first gear (506) is rotatably connected to the side wall of the movable plate (502), the output end of the third motor (505) is coaxially fixedly connected to the first gear (506), the rotating shaft (508) is rotatably connected to the side wall of the movable plate (502), the output end of the third motor (505) is coaxially fixedly connected to the first gear (506), and the rotating shaft (508) is rotatably connected to the first gear (506). The first gear (506) and the second gear (507) are coaxially and fixedly connected to one end of the rotating shaft (508); the first gear (506) and the second gear (507) are meshed with each other; the rotating cylinder (509) is fixedly sleeved on the outer wall of the rotating shaft (508); the connecting block (510) is fixedly connected to the outer wall of the rotating cylinder (509); and the vacuum suction cup (504) is fixedly connected to the side wall of the connecting block (510).

5. The feeding device for producing plastic packaging bags according to claim 1, characterized in that: First sliding holes (511) are formed through both ends of the side wall of the connecting plate (501), and two sliding rods (512) adapted to the first sliding holes (511) are fixedly connected to the side wall of the movable plate (502) close to the connecting plate, and the sliding rods (512) are slidably connected in the first sliding holes (511).

6. The feeding device for producing plastic packaging bags according to claim 1, characterized in that: The driving assembly comprises a fourth motor (604), the fourth motor (604) is fixedly connected to the mounting plate (601), the inner bottom surface and the inner top surface of the mounting frame (602) are fixedly connected to the slide rail (605), the slide rail (605) is slidably connected to the second slider (606), the sides directly facing the two second sliders (606) are fixedly connected to the racks (607), the side wall of the mounting frame (602) is rotatably connected to the third gear (608), the output end of the fourth motor (604) is coaxially fixedly connected to the third gear (608), and the third gear (608) is respectively meshed with the two racks (607); one end of the two second sliders (606) on different sides is respectively fixedly connected to the mounting blocks (609), and the mounting blocks (609) are each provided with a connecting rod (610); the two support rods (603) are respectively fixedly connected to the two connecting rods (610).

7. The feeding device for producing plastic packaging bags according to claim 6, characterized in that: A first limiting hole (611) is provided on the side wall of the mounting block (609); a second sliding hole (612) adapted to the connecting rod (610) is provided through the mounting block (609) along its length direction; the connecting rod (610) is slidably connected in the second sliding hole (612); a plurality of second limiting holes (614) are provided on the side wall of the connecting rod (610) along its length direction; the connecting rod (610) is fixed in the second sliding hole (612) by a limiting rod (613) passing through the first limiting hole (611) and the second limiting hole (614).

8. The feeding device for producing plastic packaging bags according to claim 6, characterized in that: The bottom surfaces of the two support rods (603) on each of the inner support mechanisms (6) are located at the same height, and the surfaces of the support rods (603) are coated with a silica gel layer.

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