Plastic bag bottom pasting mechanism

Abstract

The utility model discloses a plastic bag bottom pasting mechanism which comprises a rack and a discharging roller, and a swing roller mechanism is installed on the rack. A brake mechanism is installed on the rack and located on one side of the swing roller mechanism. The rack is provided with a patch paper pulling mechanism, and one side of the patch paper pulling mechanism is provided with a conveying mechanism; the rack is provided with a patch gluing mechanism, and the patch gluing mechanism is located above the conveying mechanism; the rack is provided with a patch cut-off tool mechanism, the rack is provided with a patch vacuum mechanism, and the patch vacuum mechanism is located below the patch cut-off tool mechanism. The device solves the problem that the pocket bottom is manually attached at present, and full-automatic production is achieved. The device is accurate in laminating position, high in speed and safe. The device provides a brand-new bag bottom sealing mode for the bag making machine.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag bottom patch mechanisms, and more specifically, to a plastic bag bottom patch mechanism. Background Art

[0002] A bottom patch is a reinforcing or functional sheet added to the bottom of a plastic bag or other packaging bag, mainly used to enhance the load-bearing capacity of the bag, increase stability or achieve specific functional requirements.

[0003] Most of the existing bottom patches use the operation mode of manually pasting the bottom of the bag, which results in relatively low processing efficiency of the bottom patch and poor patch quality, thus deteriorating the quality of the bag and further affecting the use of the user.

[0004] Therefore, we propose a plastic bag bottom patch mechanism to solve the above problems. Content of the Utility Model

[0005] In order to overcome the above defects of the prior art, an embodiment of the utility model provides a plastic bag bottom patch mechanism to solve the problems raised in the above background art.

[0006] To achieve the above object, the utility model provides the following technical solution: a plastic bag bottom patch mechanism, including a frame and a material feeding roller, and a swing roller mechanism is installed on the frame;

[0007] A braking mechanism is installed on the frame, and the braking mechanism is on one side of the swing roller mechanism;

[0008] A patch paper pulling mechanism is installed on the frame, and a conveying mechanism is arranged on one side of the patch paper pulling mechanism;

[0009] A patch gluing mechanism is installed on the frame, and the patch gluing mechanism is above the conveying mechanism;

[0010] A patch cutting knife mechanism is installed on the frame, and a patch vacuum mechanism is installed on the frame, and the patch vacuum mechanism is below the patch cutting knife mechanism.

[0011] In a preferred embodiment, the swing roller mechanism includes a guide roller aluminum fixing block fixed on the frame, and a first rotating rod penetrates through the guide roller aluminum fixing block. A counterweight rod is sleeved on the first rotating rod, and multiple counterweight blocks are sleeved on the counterweight rod. An arc-shaped groove is arranged on the frame, and an axis connected to the guide roller aluminum fixing block penetrates through the arc-shaped groove, and an aluminum guide roller is sleeved on the axis.

[0012] In a preferred embodiment, the braking mechanism includes a second rotating rod penetrating through the frame. On one side of the second rotating rod, there is an air shaft. One end of the second rotating rod is connected to the air shaft through a flange sleeve. The other end of the second rotating rod is fixedly connected to a brake wheel. A brake belt is sleeved on the brake wheel. One end of the brake belt is fixedly connected to a tightening spring. One end of the tightening spring is hung on the guide roller aluminum fixing block. A fixing frame is installed on the frame. An adjusting handwheel penetrates through the fixing frame. One end of the adjusting handwheel is fixedly connected to a tightening wheel. One end of the brake belt is connected to the tightening wheel. A fixing screw rod in contact with the adjusting handwheel is threadedly connected to the side wall of the fixing frame.

[0013] In a preferred embodiment, the patch paper pulling mechanism includes a first servo motor fixedly connected to the frame. A third rotating rod penetrates through the frame. A fourth rotating rod is arranged below the third rotating rod. The fourth rotating rod is connected to the driving shaft of the first servo motor through a pulley group. An upper paper pulling roller is sleeved on the third rotating rod. A lower paper pulling roller is sleeved on the fourth rotating rod. Two fixing blocks are arranged on the frame. The two ends of the third rotating rod respectively extend into the fixing blocks. Adjusting nuts are arranged on both fixing blocks. Springs are arranged on both adjusting nuts. Two eccentric clamping rings are fixedly connected to the frame. A first connecting rod is arranged between the two eccentric clamping rings. A bolt is fixedly connected to one of the eccentric clamping rings. A handle is threadedly connected to the bolt.

[0014] In a preferred embodiment, the conveying mechanism includes a power shaft penetrating through the frame. One end of the power shaft is connected to a pulley group. Two driven shafts are rotatably connected to the frame. The same conveyor belt is sleeved on the two driven shafts and the power shaft. One end of one of the driven shafts is connected to an eccentric flange. A vacuum box is fixedly connected to the frame and is located in the middle of the conveyor belt.

[0015] In a preferred embodiment, the patch gluing mechanism includes two slide rails fixedly connected to the frame. Sliders are slidably connected to both slide rails. A stabilizing frame is fixedly connected to the frame. Two adjusting handles are connected to the stabilizing frame. The lower ends of the two adjusting handles are connected to a moving seat connected to the two sliders. A gluing block is fixedly connected to the lower end of the moving seat.

[0016] In a preferred embodiment, the patch cutting knife mechanism includes a second servo motor fixedly connected to the frame. The driving shaft of the second servo motor is fixedly connected to a speed reducer. One end of the speed reducer is fixedly connected to a coupling. One end of the coupling is fixedly connected to a second connecting rod. A cutting knife is arranged on the second connecting rod. A sleeve rod is fixedly connected to the frame. A brush roller is sleeved on the sleeve rod.

[0017] In a preferred embodiment, the patch vacuum mechanism includes a fifth rotating rod, which is connected to a second servo motor through a synchronous pulley. A vacuum cylinder is sleeved on the fifth rotating rod. A vacuum interface is provided on the vacuum cylinder. A knife rest matching the cutter is provided on the vacuum cylinder, and a plurality of sucker mounting holes are provided on the vacuum cylinder.

[0018] The technical effects and advantages of the present utility model are as follows:

[0019] 1. This device solves the problem of currently relying on manual pasting of the bag bottom and realizes full-automatic production.

[0020] 2. The fitting position of this device is accurate, the speed is fast, and it is safe.

[0021] 3. This device provides a brand-new way to close the bag bottom for the bag-making machine. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is a schematic diagram of the partial sectional connection structure of the present utility model;

[0024] Figure 3 is Figure 2 the front view connection structure diagram of

[0025] Figure 4 is a schematic connection structure diagram of the swing roller mechanism in the present utility model;

[0026] Figure 5 is a schematic connection structure diagram of the braking mechanism in the present utility model;

[0027] Figure 6 is a schematic connection structure diagram of the patch paper pulling mechanism in the present utility model;

[0028] Figure 7 is a schematic connection structure diagram of the conveying mechanism in the present utility model;

[0029] Figure 8 is a schematic connection structure diagram of the patch gluing mechanism in the present utility model;

[0030] Figure 9 is a schematic connection structure diagram of the patch cutting knife mechanism in the present utility model;

[0031] Figure 10 is a schematic connection structure diagram of the patch vacuum mechanism in the present utility model.

[0032] The reference numerals are: 1 frame, 2 unwinding roller;

[0033] 3 Swing roller mechanism, 31 Guide roller aluminum fixing block, 32 First rotating rod, 33 Counterweight rod, 34 Counterweight block, 35 Arc groove, 36 Axis center, 37 Aluminum guide roller;

[0034] 4 Brake mechanism, 41 Second rotating rod, 42 Flange sleeve, 43 Air shaft, 44 Brake wheel, 45 Brake belt, 46 Tightening spring, 47 Fixed bracket, 48 Tightening wheel, 49 Adjusting handwheel;

[0035] 5 Patch paper pulling mechanism, 51 First servo motor, 52 Third rotating rod, 53 Fourth rotating rod, 54 Pulley set, 55 Upper paper pulling roller, 56 Lower paper pulling roller, 57 Fixed block, 58 Adjusting nut, 59 Spring, 510 Eccentric clamping ring, 511 First connecting rod, 512 Bolt, 513 Handle;

[0036] 6 Conveying mechanism, 61 Power shaft, 62 Driven shaft, 63 Vacuum box, 64 Conveyor belt, 65 Eccentric flange;

[0037] 7 Patch gluing mechanism, 71 Slide rail, 72 Slide block, 73 Moving frame, 74 Adjusting handle, 75 Moving seat, 76 Gluing block;

[0038] 8 Patch cutting knife mechanism, 81 Second servo motor, 82 Reducer, 83 Coupling, 84 Second connecting rod, 85 Cutting knife, 86 Sleeve rod, 87 Brush roller;

[0039] 9 Patch vacuum mechanism, 91 Synchronous belt pulley, 92 Fifth rotating rod, 93 Vacuum cylinder, 94 Vacuum interface, 95 Knife rest, 96 Suction cup mounting hole. Detailed implementation manners

[0040] 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 creative efforts shall fall within the protection scope of the present invention.

[0041] Refer to Figure 1 、 Figure 2 and Figure 3 , the plastic bag bottom patch mechanism, including a frame 1, on which a feeding roller 2 is installed. It should be particularly noted that the feeding roller 2 is the source paper roll for patches;

[0042] Refer to Figure 4, a swing roller mechanism 3 is installed on the frame 1. The swing roller mechanism 3 includes a guide roller aluminum fixing block 31 fixed on the frame 1. A first rotating rod 32 penetrates through the guide roller aluminum fixing block 31. A counterweight rod 33 is sleeved on the first rotating rod 32. Multiple counterweight blocks 34 are sleeved on the counterweight rod 33. An arc-shaped groove 35 is provided on the frame 1. An axis 36 connected to the guide roller aluminum fixing block 31 penetrates through the arc-shaped groove 35. An aluminum guide roller 37 is sleeved on the axis 36.

[0043] It should be particularly noted that the swing roller mechanism 3 is set for stable tension to prevent the sudden acceleration of the patch paper pulling mechanism 5 or the sudden deceleration of the sticker. The counterweight rod will swing to a certain extent under the action of gravity and the gravity of the counterweight of the swing roller mechanism 3, absorbing the fluctuations caused by the sudden elongation or shortening of the paper.

[0044] Refer to Figure 5 , a braking mechanism 4 is installed on the frame 1. The braking mechanism is on one side of the swing roller mechanism 3. The braking mechanism 4 includes a second rotating rod 41 penetrating through the frame 1. An air shaft 43 is provided on one side of the second rotating rod 41. One end of the second rotating rod 41 is connected to the air shaft 43 through a flange sleeve 42. The other end of the second rotating rod 41 is fixedly connected to a brake wheel 44. A brake belt 45 is sleeved on the brake wheel 44. One end of the brake belt 45 is fixedly connected to a tightening spring 46. One end of the tightening spring 46 is hung on the guide roller aluminum fixing block 31. A fixing frame 47 is installed on the frame 1. An adjusting handwheel 49 penetrates through the fixing frame 47. One end of the adjusting handwheel 49 is fixedly connected to a tightening wheel 48. One end of the brake belt 45 is connected to the tightening wheel 48. A fixing screw rod in contact with the adjusting handwheel 49 is threadedly connected to the side wall of the fixing frame 47.

[0045] Refer to Figure 6 , a patch paper pulling mechanism 5 is installed on the frame 1. The patch paper pulling mechanism 5 is on one side of the braking mechanism 4. The patch paper pulling mechanism 5 includes a first servo motor 51 fixedly connected to the frame 1. A third rotating rod 52 penetrates through the frame 1. A fourth rotating rod 53 is provided below the third rotating rod 52. The fourth rotating rod 53 is connected to the drive shaft of the first servo motor 51 through a pulley group 54. An upper paper pulling roller 55 is sleeved on the third rotating rod 52. A lower paper pulling roller 56 is sleeved on the fourth rotating rod 53. Two fixing blocks 57 are provided on the frame 1. The two ends of the third rotating rod 52 respectively extend into the fixing blocks 57. Adjusting nuts 58 are provided on the two fixing blocks 57. Springs 59 are provided on the two adjusting nuts 58. Two eccentric clamping rings 510 are fixedly connected to the frame 1. A first connecting rod 511 is provided between the two eccentric clamping rings 510. A bolt 512 is fixedly connected to one of the eccentric clamping rings 510. A handgrip 513 is threadedly connected to the bolt 512.

[0046] Refer to Figure 7, a conveying mechanism 6 is installed on the frame 1. The conveying mechanism 6 includes a power shaft 61 penetrating through the frame 1, and one end of the power shaft 61 is connected to a pulley group 54. Two driven shafts 62 are rotatably connected to the frame 1, and the same conveyor belt 64 is sleeved on the two driven shafts 62 and the power shaft 61. One end of one of the driven shafts 62 is connected to an eccentric flange 65. A vacuum box 63 is fixedly connected to the frame 1, and the vacuum box 63 is located in the middle of the conveyor belt 64.

[0047] Refer to Figure 8 , a patch gluing mechanism 7 is installed on the frame 1. The patch gluing mechanism 7 is located on one side of the conveying mechanism 6. The patch gluing mechanism 7 includes two slide rails 71 fixedly connected to the frame 1. Sliders 72 are slidably connected to both of the two slide rails 71. A stabilizing frame is fixedly connected to the frame 1. Two adjusting handles 74 are connected to the stabilizing frame. The lower ends of the two adjusting handles 74 are connected to a moving seat 75 connected to the two sliders 72, and a gluing block 76 is fixedly connected to the lower end of the moving seat 75.

[0048] Refer to Figure 9 , a patch cutting knife mechanism 8 is installed on the frame 1. The patch cutting knife mechanism 8 includes a second servo motor 81 fixedly connected to the frame 1. A driving shaft of the second servo motor 81 is fixedly connected to a speed reducer 82. One end of the speed reducer 82 is fixedly connected to a coupling 83. One end of the coupling 83 is fixedly connected to a second connecting rod 84. A cutting knife 85 is provided on the second connecting rod 84. A sleeve rod 86 is fixedly connected to the frame 1, and a brush roller 87 is sleeved on the sleeve rod 86.

[0049] Refer to Figure 10 , a patch vacuum mechanism 9 is installed on the frame 1. The patch vacuum mechanism 9 is located below the patch cutting knife mechanism 8. The patch vacuum mechanism 9 includes a fifth rotating rod 92. The fifth rotating rod 92 is connected to the second servo motor 81 through a synchronous pulley 91. A vacuum cylinder 93 is sleeved on the fifth rotating rod 92. A vacuum interface 94 is provided on the vacuum cylinder 93. A knife rest 95 matching the cutting knife 85 is provided on the vacuum cylinder 93, and a plurality of sucker mounting holes 96 are provided on the vacuum cylinder 93.

[0050] The patch paper roll is slowly conveyed to the conveying mechanism 6 under the traction of the upper paper pulling roller 55 and the lower paper pulling roller driven by the first servo motor 51 in the patch paper pulling mechanism 5. Among them, the braking mechanism 4 (generates a braking effect through the friction between the braking belt 45 and the braking wheel 44) can prevent the patch paper roll from continuously feeding. And there is a swing roller mechanism 3 between the patch paper roll feeding position and the patch paper pulling mechanism 5.

[0051] The swing roller mechanism 3 is set for stable tension to prevent the sudden acceleration of the patch paper pulling mechanism 5 or the sudden deceleration at the patch paper roll feeding place. The counterweight rod 33 will swing within a certain range under the action of gravity and the gravity of the counterweight of the swing roller mechanism 3 to absorb the fluctuations caused by the sudden elongation or shortening of the paper.

[0052] After being pulled by the patch paper pulling mechanism 5, the paper will be sent to the conveying mechanism 6. The conveying mechanism 6 will catch the paper through the conveyor belt 64 and suck the paper on the conveyor belt 64 through the vacuum box 63. The power shaft of the conveyor belt 64 is connected to the first servo motor 51 in the patch paper pulling mechanism 5 through the pulley group 54 to obtain power and drive the conveyor belt 64. While the conveyor belt 64 is driving, the paper can be stably sucked on the conveyor belt 64 and driven together with the conveyor belt 64.

[0053] At the same time, the patch gluing mechanism 7 above the conveyor belt 64 will evenly apply glue (hot melt glue or other adhesives) on the surface of the paper as needed (the gluing length can be adjusted by controlling the gluing time).

[0054] The conveyor belt 64 will convey the paper to the patch vacuum mechanism 9. The patch vacuum mechanism 9 obtains power by connecting to the patch cutting knife mechanism 8 through the synchronous belt pulley 91.

[0055] The suction cups on the patch vacuum mechanism 9 will firmly suck the paper when the conveyor belt 64 conveys the paper. At the same time, it rotates together with the patch cutting knife mechanism 8 driven by the second servo motor 81.

[0056] When rotated to a certain angle, the cutting knife 85 on the patch cutting knife mechanism 8 and the knife rest 95 on the patch vacuum mechanism 9 will form a scissor-like mechanism to cut the paper into the required length patches (the length can be adjusted by the speed ratio between the second servo motor 81 and the first servo motor 51).

[0057] At the same time, the suction cups on the patch vacuum mechanism 9 will always suck the cut patches. They are always sucked and rotated to the drum of the bag-making machine receiving unit. At this time, the motor is required to transfer the patches to the required bottom position of the bag according to the position of the bags on the bag-making machine receiving unit.

[0058] If the distance is too large, the position of the patch vacuum mechanism 9 and the drum on the bag-making machine receiving unit can be adjusted to a suitable position by adjusting the adjusting nuts on the frame 1.

[0059] When pasted to the appropriate position, the suction cups on the patch vacuum mechanism 9 will cut off the vacuum, so that the patches are firmly pasted to the bottom of the bag under the action of the glue.

[0060] Bag-making machine receiving unit: The mechanism used to collect the produced bags when the bag-making machine produces bags, located at the tail of the device.

[0061] Bottom patch unit: A mechanism that attaches a patch to the bottom of a paper bag or plastic bag to bond the bottom of the bag together.

[0062] Patch paper roll: That is, the unwinding roller 2, which is the source paper roll of the patch in the bottom patch unit.

[0063] Swinging roller mechanism 3: Provides stable tension for the paper path of the bottom patch unit.

[0064] Patch pulling mechanism 5: Provides stable power for the patch paper in the bottom patch unit.

[0065] Patch cutting knife mechanism 8: In the bottom patch unit, it cuts a roll of paper into the required patch length. There is a cutting knife on it to cut the paper into individual patches we need.

[0066] Conveyor mechanism 6: Conveys the paper stably, keeps the paper close to the conveyor belt, and provides a flat gluing environment for the patch gluing mechanism 7.

[0067] Frame 1: Mounts and fixes all the mechanisms in the bottom patch unit together. At the same time, the angle of the entire mechanism can be adjusted through nuts to facilitate the stable attachment of the patch to the bottom of the bag.

[0068] Patch vacuum mechanism 9: A mechanism that conveys the patch and uses a suction cup to hold the patch and convey it to the bottom position of the bag. It has a knife rest 95 and suction cups.

[0069] Adjusting handle 74: Rotating the handle can drive the screw rod, and the rotation of the screw rod will drive the entire patch gluing mechanism 7 to move up and down, so as to reach the required gluing position.

[0070] Slider 72: A movable part that enables the mechanism to move up and down.

[0071] Slide rail 71: Used in conjunction with the slider 72 to enable the patch gluing mechanism 7 to move up and down within a limited position.

[0072] Patch gluing mechanism 7: Applies glue to the patch to stably attach the patch to the bottom of the bag. Hot melt glue or other glues can be used.

[0073] Brake belt 45: Provides braking to prevent rotation through friction.

[0074] Air shaft 43: The position where the patch paper roll is installed. It has an inflation hole, and inflation will expand and clamp the paper roll tightly. At the same time, it can rotate because bearings are installed.

[0075] Flange sleeve 42: A part that installs the bearing and connects to the frame 1.

[0076] Brake wheel 45: Provides a braking effect by friction with the brake belt 45.

[0077] Adjusting handwheel 49: When rotated, it can adjust the tension of the brake belt 45, thereby adjusting the magnitude of the braking force.

[0078] Handle 513: It can be rotated. When threading the paper, rotate it. Through the eccentric clamping ring 510 and bolt 512, the upper paper pulling roller 55 is lifted away from the lower paper pulling roller 56 to thread the paper.

[0079] Spring 59: Provides a dumbbell for the upper paper pulling roller 55 to press the paper.

[0080] Adjusting nut 58: Adjusts the elastic force of the spring 59, thereby adjusting the magnitude of the paper pressing pressure of the upper paper pulling wheel.

[0081] Pulley group 54: Power transmission parts.

[0082] First servo motor 51: Provides power for the mechanism.

[0083] Upper paper pulling roller 55: Presses the paper, obtains power from the first servo motor 55, and pulls the paper.

[0084] Lower paper pulling roller 56: Presses the paper, obtains power from the first servo motor 55, and pulls the paper.

[0085] Brush roller 87: Eliminates static electricity through friction.

[0086] Reducer 82: Reduces the rotational speed and increases the torque.

[0087] Coupling 83: Connects the power source.

[0088] Cutting knife 85: A tool for cutting the paper roll.

[0089] Knife rest 95: A tool for cutting the paper roll.

[0090] Vacuum interface 94: An interface for connecting to a vacuum device.

[0091] Suction cup mounting hole 96: A hole for mounting a suction cup, which sucks the patch through a vacuum device.

[0092] Synchronous pulley 91: Transmission parts.

[0093] First rotating rod 32: A driven wheel for the rotation of paper threading transmission.

[0094] Counterweight 34: An adjustment part for adjusting and stabilizing the paper tension. It can slide up and down on the counterweight rod 34 of the swing roller mechanism 3 to adjust the paper tension.

[0095] Aluminum guide roller fixing block 31: A part connecting the shaft center 36 and the counterweight rod 33.

[0096] Shaft center 36: A shaft for installing the first rotating rod 32 to enable the first rotating rod 32 to rotate.

[0097] Conveyor belt 64: It conveys and sucks the patch paper to facilitate glue application.

[0098] Eccentric flange 65: Rotation can adjust the tightness of the conveyor belt 64.

[0099] Driven shaft 62: Approach the conveyor belt 64 to enable the conveyor belt 64 to transmit power.

[0100] Vacuum box 63: Through vacuum, suck the patch paper through the holes of the conveyor belt 64.

[0101] Finally, the following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the internal communication of two components. It can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0102] Second: In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0103] Finally: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Plastic bag bottom patch mechanism, including a frame (1) and a feeding roller (2), characterized in that; A swing roller mechanism (3) is installed on the frame (1); A braking mechanism (4) is installed on the frame (1), and the braking mechanism (4) is located on one side of the swing roller mechanism (3); A patch paper pulling mechanism (5) is installed on the frame (1), and a conveying mechanism (6) is arranged on one side of the patch paper pulling mechanism (5); A patch gluing mechanism (7) is installed on the frame (1), and the patch gluing mechanism (7) is located above the conveying mechanism (6); A patch cutting knife mechanism (8) is installed on the frame (1), and a patch vacuum mechanism (9) is installed on the frame (1). The patch vacuum mechanism is located below the patch cutting knife mechanism (8).

2. The plastic bag bottom patch mechanism according to claim 1, characterized in that: The swing roller mechanism (3) includes a guide roller aluminum fixing block (31) fixed on the frame (1). A first rotating rod (32) penetrates through the guide roller aluminum fixing block (31). A counterweight rod (33) is sleeved on the first rotating rod (32). Multiple counterweight blocks (34) are sleeved on the counterweight rod (33). An arc-shaped groove (35) is provided on the frame (1). An axis (36) connected to the guide roller aluminum fixing block (31) penetrates through the arc-shaped groove (35). An aluminum guide roller (37) is sleeved on the axis (36).

3. The plastic bag bottom patch mechanism according to claim 1, characterized in that: The braking mechanism (4) includes a second rotating rod (41) penetrating through the frame (1). An air shaft (43) is arranged on one side of the second rotating rod (41). One end of the second rotating rod (41) is connected to the air shaft (43) through a flange sleeve (42). The other end of the second rotating rod (41) is fixedly connected to a brake wheel (44). A brake belt (45) is sleeved on the brake wheel (44). One end of the brake belt (45) is fixedly connected to a tightening spring (46). One end of the tightening spring (46) is hung on the guide roller aluminum fixing block (31). A fixing frame (47) is installed on the frame (1). An adjusting handwheel (49) penetrates through the fixing frame (47). One end of the adjusting handwheel (49) is fixedly connected to a tightening wheel (48). One end of the brake belt (45) is connected to the tightening wheel (48). A fixing screw rod in contact with the adjusting handwheel (49) is threadedly connected to the side wall of the fixing frame (47).

4. The plastic bag bottom patch mechanism according to claim 1, characterized in that: The patch paper pulling mechanism (5) includes a first servo motor (51) fixedly connected to the frame (1). A third rotating rod (52) penetrates through the frame (1). A fourth rotating rod (53) is arranged below the third rotating rod (52). The fourth rotating rod (53) is connected to the driving shaft of the first servo motor (51) through a pulley group (54). An upper paper pulling roller (55) is sleeved on the third rotating rod (52), and a lower paper pulling roller (56) is sleeved on the fourth rotating rod (53). Two fixing blocks (57) are arranged on the frame (1), and both ends of the third rotating rod (52) extend into the fixing blocks (57) respectively. Adjusting nuts (58) are arranged on both fixing blocks (57), and springs (59) are arranged on both adjusting nuts (58). Two eccentric clamping rings (510) are fixedly connected to the frame (1). A first connecting rod (511) is arranged between the two eccentric clamping rings (510). A bolt (512) is fixedly connected to one of the eccentric clamping rings (510), and a handle (513) is threadedly connected to the bolt (512).

5. The plastic bag bottom patch mechanism according to claim 1, characterized in that: The conveying mechanism (6) includes a power shaft (61) penetrating through the frame (1), and one end of the power shaft (61) is connected to the pulley group (54). Two driven shafts (62) are rotatably connected to the frame (1). The same conveyor belt (64) is sleeved on the two driven shafts (62) and the power shaft (61). One end of one of the driven shafts (62) is connected to an eccentric flange (65). A vacuum box (63) is fixedly connected to the frame (1), and the vacuum box (63) is located in the middle of the conveyor belt (64).

6. The plastic bag bottom patch mechanism according to claim 5, characterized in that: The patch gluing mechanism (7) includes two slide rails (71) fixedly connected to the frame (1). Sliders (72) are slidably connected to both slide rails (71). A stabilizing frame is fixedly connected to the frame (1). Two adjusting handles (74) are connected to the stabilizing frame. The lower ends of the two adjusting handles (74) are connected to a moving seat (75) connected to the two sliders (72). A gluing block (76) is fixedly connected to the lower end of the moving seat (75).

7. The plastic bag bottom patch mechanism according to claim 1, characterized in that: The patch cutting knife mechanism (8) includes a second servo motor (81) fixedly connected to the frame (1). The driving shaft of the second servo motor (81) is fixedly connected to a speed reducer (82). One end of the speed reducer (82) is fixedly connected to a coupling (83). One end of the coupling (83) is fixedly connected to a second connecting rod (84). A cutting knife (85) is arranged on the second connecting rod (84). A sleeve rod (86) is fixedly connected to the frame (1), and a brush roller (87) is sleeved on the sleeve rod (86).

8. The plastic bag bottom patch mechanism according to claim 7, characterized in that: The patch vacuum mechanism (9) includes a fifth rotating rod (92). The fifth rotating rod (92) is connected to the second servo motor (81) through a synchronous pulley (91). A vacuum cylinder (93) is sleeved on the fifth rotating rod (92). A vacuum interface (94) is arranged on the vacuum cylinder (93). A knife rest (95) matching the cutting knife (85) is arranged on the vacuum cylinder (93), and a plurality of sucker mounting holes (96) are arranged on the vacuum cylinder (93).

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