Traction device of plastic bag compound machine

Abstract

The utility model discloses a traction device of a plastic bag compound machine. Comprising a rack of the plastic bag compounding machine, a first conveying roller, a second conveying roller, a tensioning roller, a long rotating shaft and an adjusting assembly, wherein the first conveying roller and the second conveying roller are rotationally arranged on the rack and are parallel to each other; the tensioning roller is rotationally arranged on the rack and is parallel to the first conveying roller; the long rotating shaft is rotationally arranged on the rack and is parallel to the tensioning roller; the two ends of the overturning arms are fixedly connected with the side wall of the rotating long shaft respectively, the rotating short shafts are rotationally connected with the other ends of the two overturning arms respectively and are symmetrical to each other, the two ends of the traction roller are detachably connected with the two rotating short shafts respectively, the driven gear is fixed to one rotating short shaft, and the driving gear is rotationally arranged on the rack and meshed with the driven gear. And the worm and gear speed reducing motor is fixedly mounted on the rack and drives the driving gear to rotate. The utility model has the following advantage and effect: the traction roller and the motor are easy and convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag compound processing equipment, in particular to a traction device of a plastic bag compound machine. Background Art

[0002] Plastic bags are currently widely used as a packaging material for fertilizers, chemical products, agricultural products, and other items. When used to package certain special items, plastic bags must be moisture-proof and heat-insulating. Therefore, a laminating machine is used to coat one or both sides of the plastic bag with a moisture-proof and heat-insulating material. This lamination is typically done using polypropylene or polyethylene as the base material, utilizing the adhesive properties of the molten coating material.

[0003] At present, in the actual operation of plastic bag compounding machines, in order to speed up the compounding efficiency, an actively rotating traction roller is usually set between the compounding structure and the unwinding structure to pull the plastic bag substrate to unwind quickly. However, the traction roller usually wears faster than other rollers and has a shorter lifespan under long-term traction work. At the same time, the motor connected to and driving the traction roller is also very prone to failure under long-term high-load work. Therefore, during the use of the compounding machine, staff are usually required to frequently manually disassemble and assemble the traction roller and motor for inspection and replacement. This manual disassembly and maintenance process is not only time-consuming, but also the traction roller and the motor output end are usually connected through a coupling. Therefore, when the motor or traction roller needs to be disassembled or reassembled separately, the coupling must also be disassembled and reassembled at the same time, resulting in extremely low efficiency of the disassembly and assembly process. Utility Model Content

[0004] The utility model aims to provide a traction device for a plastic bag compounding machine, which has the effect of easy and convenient disassembly of the traction roller and the motor.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a traction device for a plastic bag compounding machine, comprising a frame of the plastic bag compounding machine, a conveying roller 1 and a conveying roller 2 rotatably arranged on the frame and parallel to each other, a tensioning roller rotatably arranged on the frame and parallel to the conveying roller 1, a rotating long shaft rotatably arranged on the frame and parallel to the tensioning roller, an adjusting component for controlling and locking the rotation of the rotating long shaft, a pair of flip arms fixedly connected at one end to the side walls of the rotating long shaft, a pair of rotating short shafts rotatably connected to the other ends of the two flip arms and symmetrical to each other, a traction roller detachably connected to the two rotating short shafts at both ends, and a fixing The driven gear on the rotating short shaft, the driving gear rotatably set on the frame and meshing with the driven gear, the worm gear reduction motor fixedly installed on the frame and driving the driving gear to rotate, the conveying roller 1, tensioning roller, traction roller and conveying roller 2 are arranged on the frame in sequence, and the tensioning roller is located at a high position between the conveying roller 1 and the traction roller 2, the driving gear is located directly below the rotating long shaft, and when the flip arm is vertically downward, the driven gear is located below the driving gear and meshes with it, the driven gear and traction roller are located on both sides of the flip arm, the rotating short shaft rotates through the flip arm, and the two ends are respectively connected to the driven gear and traction roller.

[0006] The utility model is further configured as follows: a quick-release connection piece is provided between the rotating short shaft and the end of the traction roller, and the quick-release connection piece includes a connecting column with one end fixedly connected to the end of the rotating short shaft, a positioning column fixed to the other end of the connecting column and having an outer diameter smaller than the outer diameter of the connecting column, a pair of half-through key grooves 1 opened on the side wall of the positioning column and symmetrical in the upper and lower directions, a pair of half-through key grooves 2 opened at the end of the traction roller and aligned with the two half-through key grooves 1 respectively, a pair of half-through key grooves 1 respectively hingedly connected to the two half-through key grooves 1 at one end and capable of being simultaneously embedded in the half-through key grooves 1 and 2 A positioning key with two semi-through key slots, a rotating drum rotatably sleeved on the positioning column, a pair of movable notches opened on the side wall of the rotating drum and capable of respectively allowing the two positioning keys to move, a sliding drum sliding on the positioning column and located between the rotating drum and the connecting column, a pair of locking plates fixed to one end of the sliding drum, a pair of locking notches opened on one end of the rotating drum and for the locking plates to be inserted, a plurality of directional guide rods fixed to the other end of the sliding drum and evenly surrounding the positioning column, a plurality of directional holes opened on one end of the positioning column and respectively providing various directional holes, and a plurality of springs respectively arranged on the bottom of each directional hole.

[0007] When the positioning key is embedded in the half-through key groove one and the half-through key groove two, the missing outer contour surface of the positioning column or the traction roller end can be filled; a pair of arc-shaped baffles are fixedly provided on the side wall of the positioning column, and the two arc-shaped baffles are close to the end of the positioning column away from the connecting column, and are symmetrically located on both sides of the two half-through key grooves one; the rotating cylinder is located between the arc-shaped baffle and the sliding cylinder, and one end of the rotating cylinder is in close contact with the arc-shaped baffle, and the sliding length range of the sliding cylinder on the positioning column is not less than the length of the locking plate.

[0008] The utility model is further configured as follows: a sliding ring is fixedly provided on one end of the slide cylinder close to the connecting column, and the outer diameter of the sliding ring is consistent with the outer diameter of the connecting column, and the directional guide rods are respectively fixedly connected to the side of the sliding ring facing the connecting column.

[0009] The present invention is further configured as follows: a hinge seat is fixedly provided at one end of the positioning key, and a hinge shaft that rotates and passes through the hinge seat is fixedly provided at a middle portion of the half-through keyway.

[0010] The utility model is further configured such that when the turning arm is vertically downward, the traction roller and the second conveying roller are at the same height.

[0011] The present invention is further configured as follows: the adjustment assembly includes a worm wheel fixedly connected to one end of the rotating long shaft, and a worm rotatably arranged on the frame and meshing with the worm wheel.

[0012] The utility model is further configured as follows: one end of the worm is fixedly connected to a rotating handle.

[0013] The utility model is further configured as follows: the frame is fixedly provided with a pair of L-shaped support plates facing back to back, the two ends of the rotating long shaft are respectively rotatably connected to the vertical side walls of the two L-shaped support plates, the flip arm, the rotating short shaft and the traction roller are located between the two L-shaped support plates, and the driving gear and the driven gear are located between the vertical side walls of the L-shaped support plates and the flip arm.

[0014] The utility model is further configured as follows: the worm gear reduction motor is fixedly mounted on the side of the L-shaped support plate facing away from the flip arm, and the output end rotates through the vertical side wall of the L-shaped support plate to connect to the driving gear.

[0015] The utility model is further configured as follows: the worm gear is located on the side of the L-shaped support plate facing away from the flip arm, one end of the rotating long axis rotates through the vertical side wall of the L-shaped support plate and is fixedly connected to the worm gear, and the worm is rotatably arranged on the side of the L-shaped support plate facing away from the flip arm and engages with the worm gear.

[0016] The beneficial effect of the utility model is that by adopting the above-mentioned traction device, when it is necessary to disassemble the worm gear reduction motor, first the rotating handle is turned by hand to rotate the worm to engage the worm wheel, and then the worm wheel drives the rotating long shaft to rotate, so that the flip plate flips with the rotating long shaft as the center, and finally, the traction roller detachably connected between the rotating short shafts will flip along with the flip plate and move from just below the rotating long shaft to one side of the rotating shaft. Since the flip arm is vertically downward, the driven gear is located below the driving gear and meshes with it. Therefore, after the traction roller moves to one side of the rotating long shaft, the driven gear and the driving gear will automatically disengage and move away from each other, thereby disconnecting the transmission structure between the worm gear reduction motor and the rotating short shaft, so that the staff can disassemble the worm gear reduction motor together with the driving gear separately.

[0017] When the traction roller needs to be disassembled, the above operation is repeated again. The traction roller is moved to one side of the rotating long shaft. Then, the slide in the quick-release connector is manually moved to make the locking plate at one end of the slide exit the locking notch at one end of the rotating drum, thereby locking the rotation of the rotating drum. Then, the rotating drum is manually rotated to align the two movable notches on the rotating drum with the two half-through key slots, so that the positioning key inside the hinged half-through key slot at one end can be moved and flipped. Finally, the positioning key is pulled out of the two half-through key slots at the end of the traction roller, and the connection between the rotating short shaft and the end of the traction roller is released. In this way, the traction roller can be easily disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 2 is a schematic diagram of the operation of this embodiment;

[0020] Figure 2 This is a schematic diagram of the connection and positional relationship of components on the L-shaped support plate of this embodiment;

[0021] Figure 3 2 is a schematic structural diagram of the quick-release connector of this embodiment;

[0022] Figure 4 is a structural cross-sectional view of the quick-release connector of this embodiment;

[0023] In the figure, 1. frame; 1a. L-shaped support plate; 2. conveying roller 1; 3. conveying roller 2; 4. tensioning roller; 5. rotating long shaft; 6. adjusting assembly; 6a. worm gear; 6b. worm; 6c. rotating handle; 7. flip arm; 8. rotating short shaft; 9. traction roller; 10. driven gear; 11. driving gear; 12. worm gear reduction motor; 13. quick-release connector; 13a. connecting column; 13b. positioning column; 13c. arc baffle; 13d. half-through keyway 1; 13e. half-through keyway 2; 13f. positioning key; 13g. rotating cylinder; 13h. movable notch; 13i. slide cylinder; 13j. locking plate; 13k. locking notch; 13l. directional guide rod; 13m. directional hole; 13n. spring; 13o. sliding ring; 13p. articulated seat; 13q. articulated shaft. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0025] Example: A traction device for a plastic bag compounding machine, such as Figure 1-4 As shown, it includes a frame 1 of a plastic bag compounding machine, a conveying roller 2 and a conveying roller 3 rotatably arranged on the frame 1 and parallel to each other, a tensioning roller 4 rotatably arranged on the frame 1 and parallel to the conveying roller 2, a rotating long shaft 5 rotatably arranged on the frame 1 and parallel to the tensioning roller 4, an adjusting component 6 for controlling and locking the rotation of the rotating long shaft 5, a pair of flip arms 7 respectively fixedly connected to the side walls of the rotating long shaft 5 at one end, a pair of rotating short shafts 8 respectively rotatably connected to the other ends of the two flip arms 7 and symmetrical to each other, a traction roller 9 respectively detachably connected to the two rotating short shafts 8 at both ends, a driven gear 10 fixed on one rotating short shaft 8, a driving gear 11 rotatably arranged on the frame 1 and meshing with the driven gear 10, and a driving gear 11 fixedly installed on the frame 1 and driving the driving gear 1 1 rotates the worm gear reduction motor 12, the conveying roller 2, the tensioning roller 4, the traction roller 9 and the conveying roller 2 3 are arranged on the frame 1 in sequence, and the tensioning roller 4 is located at a high position between the conveying roller 2 and the traction roller 9. The driving gear 11 is located directly below the rotating long shaft 5, and when the flip arm 7 is vertically downward, the driven gear 10 is located below the driving gear 11 and meshes with it. The driven gear 10 and the traction roller 9 are located on both sides of the flip arm 7. The rotating short shaft 8 rotates through the flip arm 7, and the two ends are respectively connected to the driven gear 10 and the traction roller 9. The adjusting component 6 includes a worm wheel 6a fixedly connected to one end of the rotating long shaft 5, a worm 6b rotatably set on the frame 1 and meshing with the worm wheel 6a, and one end of the worm 6b is fixedly connected to a rotating handle 6c.

[0026] Furthermore, a quick-release connector 13 is provided between the end of the rotating short shaft 8 and the traction roller 9. The quick-release connector 13 includes a connecting column 13a fixedly connected to the end of the rotating short shaft 8 at one end, a positioning column 13b fixed to the other end of the connecting column 13a and having an outer diameter smaller than the outer diameter of the connecting column 13a, a pair of half-through key grooves 13d opened on the side walls of the positioning column 13b and symmetrical in the upper and lower directions, and a pair of half-through key grooves 13d opened at the end of the traction roller 9 and aligned with the two half-through key grooves 13d respectively. 3e, a pair of positioning keys 13f, each of which is hingedly connected to the two half-through key slots 13d at one end and can be inserted into both the half-through key slot 13d and the half-through key slot 2 13e at the same time, a rotating cylinder 13g rotatably sleeved on the positioning column 13b, a pair of movable notches 13h provided on the side walls of the rotating cylinder 13g and capable of respectively allowing the two positioning keys 13f to move, a sliding cylinder 13i sliding on the positioning column 13b and located between the rotating cylinder 13g and the connecting column 13a, and a pair of locking plates 13f fixed to one end of the sliding cylinder 13i. 3j, a pair of locking notches 13k provided at one end of the rotating drum 13g and for inserting the locking plate 13j, a plurality of directional guide rods 13l fixed to the other end of the slide 13i and uniformly surrounding the positioning column 13b, a plurality of directional holes 13m provided at one end of the positioning column 13b, and a plurality of springs 13n provided on the bottom of each directional hole 13m; when the locating key 13f is inserted into the half-through keyway 13d and the half-through keyway 2 13e, the locating column 13b or the pulling roller 9 can be supplemented. The outer contour surface is missing at the end; a pair of arc-shaped baffles 13c are fixedly provided on the side wall of the positioning column 13b, and the two arc-shaped baffles 13c are close to the end of the positioning column 13b away from the connecting column 13a, and are symmetrically located on both sides of the two half-through key grooves 13d, the rotating cylinder 13g is located between the arc-shaped baffle 13c and the slide cylinder 13i, and one end of the rotating cylinder 13g is in close contact with the arc-shaped baffle 13c, and the sliding length range of the slide cylinder 13i on the positioning column 13b is not less than the length of the locking plate 13j.

[0027] The use of the quick-release connector 13 not only enables rapid assembly and disassembly of the traction roller 9, but also smoothly transmits the rotation of the rotating stub shaft 8 to the traction roller 9, ensuring stable rotation of the traction roller 9. The directional guide rod 131 and directional hole 13m not only prevent the slide 13i from rotating, but also cooperate with the elastic force of the spring 13n inside the positioning hole to push the locking plate 13j on the slide 13i into the locking notch 13k for stable insertion. The arc-shaped baffle 13c limits the displacement of the rotating drum 13g, preventing it from slipping off the positioning post 13b.

[0028] Furthermore, a sliding ring 13o is fixedly mounted on one end of the slide 13i near the connecting post 13a. The outer diameter of the sliding ring 13o matches that of the connecting post 13a. A directional guide rod 13l is fixedly attached to the side of the sliding ring 13o facing the connecting post 13a. The use of the sliding ring 13o not only makes it easier for operators to manipulate the slide 13i, but also increases the usable surface area at the end of the slide 13i, allowing for connection to thicker and more robust positioning guide rods.

[0029] Furthermore, a hinge seat 13p is fixedly mounted on one end of the positioning key 13f, and a hinge shaft 13q is fixedly mounted in the middle of the semi-through keyway 13d, which rotates through the hinge seat 13p. The use of this hinge seat 13p and hinge shaft 13q not only achieves an articulated connection between the positioning key 13f and the semi-through keyway 13d, but also indirectly increases the range of rotational movement of the positioning key 13f.

[0030] Furthermore, when the flip arm 7 is vertically downward, the traction roller 9 and the conveyor roller 2 3 are at the same height. By adopting the above height position relationship, the traction roller 9 can be quickly put into traction work when it is installed and returned to its initial position from the side of the rotating shaft 5.

[0031] Furthermore, the frame 1 is fixedly provided with a pair of L-shaped support plates 1aL facing back to back, and the two ends of the rotating long shaft 5 are respectively rotatably connected to the vertical side walls of the two L-shaped support plates 1aL, the flip arm 7, the rotating short shaft 8 and the traction roller 9 are located between the two L-shaped support plates 1aL, and the driving gear 11 and the driven gear 10 are located between the vertical side walls of the L-shaped support plate 1aL and the flip arm 7; the worm gear reduction motor 12 is fixedly installed on the side of the L-shaped support plate 1aL facing away from the flip arm 7, and the output end rotates through the vertical side wall of the L-shaped support plate 1aL to connect to the driving gear 11; the worm gear 6a is located on the side of the L-shaped support plate 1aL facing away from the flip arm 7, one end of the rotating long shaft 5 rotates through the vertical side wall of the L-shaped support plate 1aL and is fixedly connected to the worm gear 6a, and the worm 6b is rotatably arranged on the side of the L-shaped support plate 1aL facing away from the flip arm 7 and engages with the worm gear 6a. By adopting the above-mentioned L-shaped support plate 1aL, not only can stable support be provided for parts such as the rotating long shaft 5, the driving gear 11, the worm gear reduction motor 12, and the worm 6b, but it can also facilitate the staff to disassemble the entire structure connecting and driving the traction roller 9 from the compound machine frame 1 for inspection and maintenance.

[0032] The working principle of this embodiment is as follows:

[0033] When it is necessary to disassemble the worm gear reduction motor 12, first manually turn the rotating handle 6c to make the worm 6b rotate and engage the worm wheel 6a, and then the worm wheel 6a drives the rotating long shaft 5 to rotate, so that the flip plate flips with the rotating long shaft 5 as the center, and finally, the traction roller 9 detachably connected between the rotating short shaft 8 will flip with the flip plate and move from just below the rotating long shaft 5 to one side of the rotating shaft. Since the flip arm 7 is vertically downward, the driven gear 10 is located below the driving gear 11 and meshes with it. Therefore, after the traction roller 9 moves to the side of the rotating long shaft 5, the driven gear 10 and the driving gear 11 will automatically disengage and move away from each other, thereby disconnecting the transmission structure between the worm gear reduction motor 12 and the rotating short shaft 8, so that the staff can remove the worm gear reduction motor 12 together with the driving gear 11 separately;

[0034] When it is necessary to disassemble the traction roller 9, the above operation is repeated again. The traction roller 9 is moved to one side of the rotating shaft 5. Then, the slide 13i in the quick-release connector 13 is manually moved, so that the locking plate 13j at one end of the slide 13i is removed from the locking notch 13k at one end of the rotating drum 13g, thereby locking the rotation of the rotating drum 13g. Then, the rotating drum 13g is manually rotated by the other hand, so that the two movable notches 13h on the rotating drum 13g are aligned with the two half-through key grooves 13d, respectively, so that the positioning key 13f inside the hinged half-through key groove 13d at one end can be moved and flipped. Finally, the positioning key 13f is pulled out of the two half-through key grooves 13e at the end of the traction roller 9, thereby releasing the connection between the rotating short shaft 8 and the end of the traction roller 9. In this way, the traction roller 9 can be conveniently disassembled. Among them, the directional guide rod 131 and the directional hole 13m can not only prevent the slide 13i from rotating, but also cooperate with the elastic force of the spring 13n inside the positioning hole to push the locking plate 13j on the slide 13i to be stably inserted into the locking notch 13k.

Claims

1. A traction device for a plastic bag compounding machine, characterized in that: The invention comprises a frame (1) of a plastic bag compounding machine, a conveying roller (2) and a conveying roller (3) rotatably arranged on the frame (1) and parallel to each other, a tensioning roller (4) rotatably arranged on the frame (1) and parallel to the conveying roller (2), a rotating long shaft (5) rotatably arranged on the frame (1) and parallel to the tensioning roller (4), an adjusting component (6) for controlling and locking the rotation of the rotating long shaft (5), a pair of flipping arms (7) each fixedly connected at one end to a side wall of the rotating long shaft (5), a pair of rotating short shafts (8) each symmetrically connected to the other ends of the two flipping arms (7), a traction roller (9) each detachably connected at both ends to the two rotating short shafts (8), a driven gear (10) fixed on one rotating short shaft (8), and a rotating gear (10) rotatably arranged on the frame (1) and meshing with the driven gear (10). The invention relates to a driving gear (11) and a worm gear reduction motor (12) fixedly mounted on the frame (1) and driving the driving gear (11) to rotate. The conveying roller (2), the tensioning roller (4), the traction roller (9) and the conveying roller (3) are arranged on the frame (1) in sequence, and the tensioning roller (4) is located at a high position between the conveying roller (2) and the traction roller (9). The driving gear (11) is located directly below the rotating long shaft (5). When the turning arm (7) is vertically downward, the driven gear (10) is located below the driving gear (11) and meshes with it. The driven gear (10) and the traction roller (9) are located on both sides of the turning arm (7). The rotating short shaft (8) rotates through the turning arm (7) and is connected to the driven gear (10) and the traction roller (9) at both ends.

2. The traction device of the plastic bag compounding machine according to claim 1, characterized in that: A quick-release connector (13) is provided between the ends of the rotating short shaft (8) and the traction roller (9), and the quick-release connector (13) comprises a connecting column (13a) fixedly connected to the end of the rotating short shaft (8), a positioning column (13b) fixed to the other end of the connecting column (13a) and having an outer diameter smaller than the outer diameter of the connecting column (13a), a pair of half-through key grooves (13d) opened on the side wall of the positioning column (13b) and symmetrical in the upper and lower directions, a pair of half-through key grooves (13e) opened on the ends of the traction roller (9) and aligned with the two half-through key grooves (13d), a pair of positioning keys (13f) hingedly connected to the two half-through key grooves (13d) at one end and capable of being simultaneously embedded in the half-through key groove (13d) and the half-through key groove (13e), and a rotating sleeve on the positioning column ( a rotating cylinder (13g) on ​​the rotating cylinder (13b), a pair of movable notches (13h) provided on the side wall of the rotating cylinder (13g) and capable of respectively allowing two positioning keys (13f) to move, a sliding cylinder (13i) sliding on the positioning column (13b) and located between the rotating cylinder (13g) and the connecting column (13a), a pair of locking plates (13j) fixed to one end of the sliding cylinder (13i), a pair of locking notches (13k) provided at one end of the rotating cylinder (13g) and for the locking plates (13j) to be inserted, a plurality of directional guide rods (13l) fixed to the other end of the sliding cylinder (13i) and uniformly surrounding the positioning column (13b), a plurality of directional holes (13m) provided at one end of the positioning column (13b) and respectively providing for each directional hole, and a plurality of springs (13n) respectively provided on the bottom of each directional hole (13m). When the positioning key (13f) is embedded in the half-through keyway 1 (13d) and the half-through keyway 2 (13e), the outer contour surface missing at the end of the positioning column (13b) or the traction roller (9) can be supplemented; a pair of arc-shaped baffles (13c) are fixedly provided on the side wall of the positioning column (13b), and the two arc-shaped baffles (13c) are close to one end of the positioning column (13b) away from the connecting column (13a), and are symmetrically located on both sides of the two half-through keyways (13d); the rotating cylinder (13g) is located between the arc-shaped baffle (13c) and the sliding cylinder (13i), and one end of the rotating cylinder (13g) is in close contact with the arc-shaped baffle (13c); the sliding length range of the sliding cylinder (13i) on the positioning column (13b) is not less than the length of the locking plate (13j).

3. The traction device of the plastic bag compounding machine according to claim 2, characterized in that: A sliding ring (13o) is fixedly provided at one end of the slide cylinder (13i) close to the connecting column (13a), and the outer diameter of the sliding ring (13o) is consistent with the outer diameter of the connecting column (13a). The directional guide rods (13l) are respectively fixedly connected to the side of the sliding ring (13o) facing the connecting column (13a).

4. The traction device of the plastic bag compounding machine according to claim 2, characterized in that: One end of the positioning key (13f) is fixedly provided with a hinge seat (13p), and the middle part of the half-through keyway (13d) is fixedly provided with a hinge shaft (13q) that rotates and passes through the hinge seat (13p).

5. The traction device of the plastic bag compounding machine according to claim 1, characterized in that: When the turning arm (7) is vertically downward, the traction roller (9) and the second conveying roller (3) are at the same height.

6. The traction device of the plastic bag compounding machine according to claim 1, characterized in that: The adjustment assembly (6) comprises a worm wheel (6a) fixedly connected to one end of the rotating long shaft (5), and a worm (6b) rotatably arranged on the frame (1) and meshing with the worm wheel (6a).

7. The traction device of the plastic bag compounding machine according to claim 6, characterized in that: One end of the worm (6b) is fixedly connected to a rotating handle (6c).

8. The traction device of the plastic bag compounding machine according to claim 6, characterized in that: The frame (1) is fixedly provided with a pair of L-shaped support plates (1aL) facing away from each other; the two ends of the rotating long shaft (5) are respectively rotatably connected to the vertical side walls of the two L-shaped support plates (1aL); the turning arm (7), the rotating short shaft (8) and the traction roller (9) are located between the two L-shaped support plates (1aL); and the driving gear (11) and the driven gear (10) are located between the vertical side walls of the L-shaped support plate (1aL) and the turning arm (7).

9. The traction device of the plastic bag compounding machine according to claim 8, characterized in that: The worm gear reduction motor (12) is fixedly mounted on a side of the L-shaped support plate (1aL) facing away from the flip arm (7), and the output end rotates through the vertical side wall of the L-shaped support plate (1aL) to connect to the driving gear (11).

10. The traction device of the plastic bag compounding machine according to claim 8, characterized in that: The worm gear (6a) is located on the side of the L-shaped support plate (1aL) facing away from the flip arm (7); one end of the rotating long axis (5) rotates through the vertical side wall of the L-shaped support plate (1aL) and is fixedly connected to the worm gear (6a); the worm (6b) is rotatably arranged on the side of the L-shaped support plate (1aL) facing away from the flip arm (7) and engages with the worm gear (6a).

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