A step-by-step automatic tying machine for woven bags

Abstract

The present invention discloses a step-by-step automatic tying machine for woven bags, comprising: a frame, a rotating mechanism is arranged on the top of the frame, the output end of the rotating mechanism is connected to a rope winding drum, a first rope mixing mechanism, a rope stripping mechanism and a closing mechanism are arranged inside the rope winding drum, a rope cutting mechanism, a second rope mixing mechanism and a rope end fixing mechanism are arranged on one side of the frame, a first rope digging mechanism and a second rope digging mechanism are arranged on one side of the second rope mixing mechanism, a rope feeding mechanism is arranged on the other side of the second rope mixing mechanism, and a rope threading hole is arranged on the top of the frame. The present invention can complete the processes of closing, rope winding, knotting, tying, cutting, and rope extension in one operation through the cooperation of the rotating mechanism, the rope winding drum, the first rope mixing mechanism, the rope stripping mechanism, the closing mechanism, the rope cutting mechanism, the second rope mixing mechanism, the rope end fixing mechanism, the first rope digging mechanism, the second rope digging mechanism and the rope feeding mechanism, thereby realizing the automatic continuous operation of tying and knotting the woven bag, and effectively improving the knotting efficiency and knotting rate.

Description

Technical Field

[0001] The invention relates to the technical field of woven bag tying equipment, and more specifically to a step-by-step automatic tying machine for woven bags. Background Art

[0002] Woven bags (also known as snakeskin bags) are the most commonly used packaging bags in many industries such as agricultural and sideline product packaging, logistics and transportation industry, and construction material bundling packaging. Automatic packaging and bundling with ropes can greatly save human resources and improve production efficiency. However, existing woven bag tying machines generally have problems such as low knotting rate and low knotting efficiency, and cannot achieve continuous operation. Therefore, there is an urgent need to develop an automatic woven bag tying machine with stable knotting quality and high knotting efficiency. Summary of the invention

[0003] In view of this, the present invention provides a step-by-step automatic tying machine for woven bags, the purpose of which is to solve the problems existing in the prior art.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A step-by-step automatic tying machine for woven bags comprises: a frame; a rotating mechanism is provided on the top of the frame; the output end of the rotating mechanism is connected to a rope winding drum; a first rope mixing mechanism, a rope removing mechanism and a closing mechanism are provided inside the rope winding drum; a rope cutting mechanism, a second rope mixing mechanism and a rope end fixing mechanism opposite to the rope winding drum are provided on one side of the frame from top to bottom; a first rope pulling mechanism and a second rope pulling mechanism are provided on one side of the second rope mixing mechanism, and a rope feeding mechanism is provided on the other side of the second rope mixing mechanism; the first rope pulling mechanism, the second rope pulling mechanism and the rope feeding mechanism are all arranged on the frame; a rope threading hole corresponding to the rope end fixing mechanism is provided on the top of the frame.

[0006] Preferably, the rotating mechanism includes a motor, a hollow rotating platform and a hollow rotating shaft; the hollow rotating platform is fixedly connected to the top of the frame through a connecting flange; the output end of the motor is connected to the input end of the hollow rotating platform; the hollow rotating shaft is connected to the output end of the hollow rotating platform; and the rope drum is connected to the bottom of the hollow rotating shaft.

[0007] Preferably, the closing mechanism includes a lifting cylinder, a lifting column, a two-way cylinder, a first closing splint and a second closing splint; the lifting cylinder is connected to the top of the hollow rotating platform through a cylinder bracket; one end of the lifting column is connected to the output end of the lifting cylinder; the other end of the lifting column passes through the middle cavity of the hollow rotating platform and the hollow rotating shaft and is connected to the top of the two-way cylinder; the first closing splint and the second closing splint are respectively connected to the output ends on both sides of the two-way cylinder.

[0008] Preferably, the rope-off mechanism includes a rope-off cylinder and a rope-off pressure plate; the rope-off cylinder is connected to the inner wall of the rope winding drum; the rope-off pressure plate is connected to the output end of the rope-off cylinder; a rope-off groove corresponding to the rope-off pressure plate is provided on the rope winding drum; the rope-off pressure plate passes through the rope-off groove and extends to the outside of the rope winding drum.

[0009] Preferably, the first rope mixing mechanism comprises a telescopic cylinder and a dynamic rope mixing frame; the telescopic cylinder is connected to the inner top wall of the rope winding drum; the dynamic rope mixing frame is connected to the output end of the telescopic cylinder; the bottom of the dynamic rope mixing frame extends out of the rope winding drum.

[0010] Preferably, the second rope mixing mechanism comprises a second lifting cylinder and a fixed rope mixing frame; the second lifting cylinder is connected to the frame; and the fixed rope mixing frame is connected to the output end of the second lifting cylinder.

[0011] Preferably, the rope feeding mechanism comprises a first lifting cylinder and a first pneumatic clamping finger; the first lifting cylinder is connected to the frame; and the first pneumatic clamping finger is connected to the output end of the first lifting cylinder.

[0012] Preferably, the first rope-pulling mechanism includes a first rope-pulling cylinder, a rotating finger cylinder and a first rope-pulling clamping finger; the first rope-pulling cylinder is connected to the frame; the first rope-pulling cylinder is arranged obliquely to the central axis of the rope winding drum; the rotating finger cylinder is connected to the output end of the first rope-pulling cylinder; the first rope-pulling clamping finger is connected to the output end of the rotating finger cylinder.

[0013] Preferably, the second rope-pulling mechanism is arranged on a side of the first rope-pulling mechanism close to the rope winding drum; the second rope-pulling mechanism includes a second rope-pulling cylinder, a second pneumatic clamping finger and a second rope-pulling clamping finger; the second rope-pulling cylinder is connected to the frame; the second rope-pulling cylinder is arranged perpendicular to the central axis of the rope winding drum; the second pneumatic clamping finger is connected to the output end of the second rope-pulling cylinder; the second rope-pulling clamping finger is connected to the output end of the second pneumatic clamping finger.

[0014] Preferably, the rope cutting mechanism is a pneumatic scissors; and the rope end fixing mechanism is a third pneumatic clamping finger.

[0015] Preferably, a pneumatic slip ring is sleeved on the outer side of the hollow rotating shaft; the top of the pneumatic slip ring fixed part is connected to the bottom of the connecting flange; and the bottom of the pneumatic slip ring rotating part is connected to the top of the rope drum.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] 1) The present invention can complete the processes of closing, winding, knotting, tightening, cutting, and rope extension in one operation through the cooperation of the rotating mechanism, the rope winding drum, the first rope mixing mechanism, the rope stripping mechanism, the closing mechanism, the rope cutting mechanism, the second rope mixing mechanism, the rope end fixing mechanism, the first rope digging mechanism, the second rope digging mechanism, and the rope feeding mechanism, thereby realizing the automated and continuous operation of tying and knotting the woven bag, and effectively improving the knotting efficiency and knotting rate;

[0018] 2) The step-by-step automatic tying machine designed by the present invention can adapt to different types of ropes and flexible woven bags, solving the problem of low adaptability of previous tying machines. It can be promoted and used in different industries such as agricultural and sideline food packaging industry, logistics and transportation industry, etc., which can greatly improve the production efficiency of enterprises, save labor costs, and promote rapid economic development;

[0019] 3) The present invention solves the problem that the rope is not easy to automatically thread into a knot during the knotting process, optimizes the process of threading and knotting, and performs reliable constraint processing on the flexible body, providing valuable research and development experience support for other similar studies;

[0020] 4) The knot tied by the tying machine of the present invention is a slipknot, and enterprises and users can conveniently open the bag mouth according to their own needs, and the subsequent order can be manually tied in the same way, which does not affect the transportation and packaging of the goods, has high flexibility, and solves the one-time tying problem of common tying machines;

[0021] 5) The tying machine designed by the present invention can complete the processes of closing, rope winding, knotting, tightening, cutting, and rope extension in one operation. It has rich functions and can meet the needs of most users, thus solving the defect of the original tying machine with single function. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an axonometric diagram of a step-by-step automatic tying machine for woven bags of the present invention;

[0023] Figure 2 It is a side view of a step-by-step automatic tying machine for woven bags of the present invention;

[0024] Figure 3 It is a plan view of the rope feeding mechanism, the second rope mixing mechanism, the first rope pulling mechanism and the second rope pulling mechanism on the frame;

[0025] Figure 4 It is a stereoscopic diagram of the rope feeding mechanism, the second rope mixing mechanism, the first rope pulling mechanism and the second rope pulling mechanism on the frame;

[0026] Figure 5 It is a schematic diagram of the internal structure of the rope drum;

[0027] Figure 6 It is a structural schematic diagram of a bidirectional cylinder, a first closing clamping plate and a second closing clamping plate;

[0028] In the figure: 1, frame; 2, rotating mechanism; 201, motor; 202, hollow rotating platform; 203, hollow rotating shaft; 3, rope feeding mechanism; 301, first lifting cylinder; 302, first pneumatic clamping finger; 4, first rope mixing mechanism; 401, telescopic cylinder; 402, dynamic rope mixing frame; 5, rope stripping mechanism; 501, rope stripping cylinder; 502, rope stripping pressure plate; 6, closing mechanism; 601, lifting cylinder; 602, lifting column; 603, two-way cylinder; 604, first closing clamping plate; 605, second Closing splint; 7. Second rope mixing mechanism; 701. Second lifting cylinder; 702. Fixed rope mixing frame; 8. First rope pulling mechanism; 801. First rope pulling cylinder; 802. Rotating finger cylinder; 803. First rope pulling clamping finger; 9. Second rope pulling mechanism; 901. Second rope pulling cylinder; 902. Second pneumatic clamping finger; 903. Second rope pulling clamping finger; 10. Rope winding drum; 11. Rope threading hole; 12. Pneumatic scissors; 13. Third pneumatic clamping finger; 14. Connecting flange; 15. Cylinder bracket; 16. Pneumatic slip ring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example

[0031] Reference Figure 1-6 As shown, the present invention discloses a step-by-step automatic tying machine for woven bags, comprising: a frame 1; a rotating mechanism 2 is arranged on the top of the frame 1; the output end of the rotating mechanism 2 is connected to a rope drum 10 with a bottom opening; a first rope mixing mechanism 4, a rope removing mechanism 5 and a closing mechanism 6 are arranged inside the rope drum 10; a rope cutting mechanism, a second rope mixing mechanism 7 and a rope end fixing mechanism opposite to the rope drum 10 are arranged on one side of the frame 1 from top to bottom; a first rope pulling mechanism 8 and a second rope pulling mechanism 9 are arranged on one side of the second rope mixing mechanism 7, and a rope feeding mechanism 3 is arranged on the other side of the second rope mixing mechanism 7; the second rope pulling mechanism 9 is arranged on the side of the first rope pulling mechanism 8 close to the rope drum 10; the first rope pulling mechanism 8, the second rope pulling mechanism 9 and the rope feeding mechanism 3 are all arranged on the frame 1; a rope threading hole 11 corresponding to the rope end fixing mechanism is arranged on the top of the frame 1.

[0032] In this embodiment, the rotating mechanism 2 includes a motor 201, a hollow rotating platform 202 and a hollow rotating shaft 203; the hollow rotating platform 202 is fixedly connected to the top of the frame 1 through a connecting flange 14; the output end of the motor 201 is connected to the input end of the hollow rotating platform 202; the hollow rotating shaft 203 is connected to the output end of the hollow rotating platform 202; the rope drum 10 is connected to the bottom of the hollow rotating shaft 203, and the hollow rotating shaft 203 is coaxially arranged with the rope drum 10; when in use, the motor 201 drives the hollow rotating shaft 203 to rotate through the hollow rotating platform 202, and the hollow rotating shaft 203 drives the rope drum 10 to rotate, thereby completing the rotating rope winding operation.

[0033] In this embodiment, the closing mechanism 6 includes a lifting cylinder 601, a lifting column 602, a two-way cylinder 603, a first closing clamp 604 and a second closing clamp 605; the lifting cylinder 601 is connected to the top of the hollow rotating platform 202 through a cylinder bracket 15; one end of the lifting column 602 is connected to the output end of the lifting cylinder 601; the other end of the lifting column 602 passes through the middle cavity of the hollow rotating platform 202 and the hollow rotating shaft 203 and is connected to the top of the two-way cylinder 603; the lifting column 602 is coaxially arranged with the hollow rotating shaft 203; the first closing clamp 604 and the second closing clamp 605 are respectively connected to the output ends on both sides of the two-way cylinder 603.

[0034] In this embodiment, the first closing clamping plate 604 and the second closing clamping plate 605 are respectively provided with a first V-shaped clamping opening and a second V-shaped clamping opening at opposite ends thereof, for clamping the opening of the woven bag.

[0035] In this embodiment, the first closing clamp 604 is located above the second closing clamp 605; a second V-shaped clamp block is provided at the bottom of the first closing clamp 604 and is adapted to the second V-shaped clamp on the second closing clamp 605; a first V-shaped clamp block is provided at the top of the second closing clamp 605 and is adapted to the first V-shaped clamp on the first closing clamp 604, so as to improve the effect of clamping the bag opening of the woven bag.

[0036] In this embodiment, the rope-off mechanism 5 includes a rope-off cylinder 501 and a rope-off pressure plate 502; the rope-off cylinder 501 is connected to the inner wall of the rope drum 10; the rope-off pressure plate 502 is connected to the output end of the rope-off cylinder 501; a rope-off groove corresponding to the rope-off pressure plate 502 is opened on the side wall of the rope drum 10 to facilitate the up and down movement of the rope-off pressure plate 501; the rope-off pressure plate 502 passes through the rope-off groove and extends to the outside of the rope drum 10.

[0037] In this embodiment, there are three rope-removing mechanisms 5 , which are evenly distributed on the inner wall of the rope drum 10 in a circumferential direction, so as to improve the rope-removing efficiency and effect.

[0038] In this embodiment, the first rope mixing mechanism 4 includes a telescopic cylinder 401 and a dynamic rope mixing frame 402; the telescopic cylinder 401 is connected to the inner top wall of the rope winding drum 10; the dynamic rope mixing frame 402 is connected to the output end of the telescopic cylinder 401; the bottom of the dynamic rope mixing frame 402 extends out of the rope winding drum 10.

[0039] In this embodiment, the dynamic mixing rope frame 402 includes a vertical rod and two horizontal rods; the top of the vertical rod is connected to the output end of the telescopic cylinder 401; the two horizontal rods are arranged side by side on the side of the top of the vertical rod away from the rope drum 10; a mixing rope groove corresponding to the two horizontal rods is opened on the side wall of the rope drum 10; the two horizontal rods pass through the mixing rope groove and extend to the outside of the rope drum 10.

[0040] In this embodiment, the second rope mixing mechanism 7 includes a second lifting cylinder 701 and a fixed rope mixing frame 702 ; the second lifting cylinder 701 is connected to the frame 1 ; the fixed rope mixing frame 702 is connected to the output end of the second lifting cylinder 701 .

[0041] In this embodiment, the fixed mixing rope frame 702 is configured as a U-shaped structure; the distance between the two cross bars of the dynamic mixing rope frame 402 is smaller than the width of the opening of the fixed mixing rope frame 702.

[0042] In this embodiment, a rope limiting groove is provided on one side of the fixed mixing rope frame 702 close to the rope, which can not only play a certain limiting role on the rope, but also provide a certain movement space for the rope.

[0043] In this embodiment, the rope feeding mechanism 3 includes a first lifting cylinder 301 and a first pneumatic clamping finger 302 ; the first lifting cylinder 301 is connected to the frame 1 ; and the first pneumatic clamping finger 302 is connected to the output end of the first lifting cylinder 301 .

[0044] In this embodiment, the first rope-pulling mechanism 8 includes a first rope-pulling cylinder 801, a rotating finger cylinder 802 and a first rope-pulling clamping finger 803; the first rope-pulling cylinder 801 is connected to the frame 1; the first rope-pulling cylinder 801 is arranged obliquely to the central axis of the rope winding drum 10; the rotating finger cylinder 802 is connected to the output end of the first rope-pulling cylinder 801; the first rope-pulling clamping finger 803 is connected to the output end of the rotating finger cylinder 802.

[0045] In this embodiment, the first rope-picking clamping finger 803 includes a first rope-picking upper clamping finger and a first rope-picking lower clamping finger respectively connected to the two clamping jaws of the rotating finger cylinder 802; arc-shaped clamping grooves are provided at the relative positions of the front ends of the first rope-picking upper clamping finger and the first rope-picking lower clamping finger.

[0046] In this embodiment, the number of the first rope-picking upper clamping fingers and the first rope-picking lower clamping fingers are both two; the two first rope-picking upper clamping fingers and the two first rope-picking lower clamping fingers are both connected to the two clamping claws of the rotating finger cylinder 802 through a T-shaped plate.

[0047] In this embodiment, the second rope-pulling mechanism 9 includes a second rope-pulling cylinder 901, a second pneumatic clamping finger 902 and a second rope-pulling clamping finger 903; the second rope-pulling cylinder 901 is connected to the frame 1; the second rope-pulling cylinder 901 is arranged perpendicular to the central axis of the rope winding drum 10; the second pneumatic clamping finger 902 is connected to the output end of the second rope-pulling cylinder 901; the second rope-pulling clamping finger 903 is connected to the output end of the second pneumatic clamping finger 902.

[0048] In this embodiment, the rope cutting mechanism is a pneumatic scissors 12 ; the rope end fixing mechanism is a third pneumatic clamping finger 13 .

[0049] In this embodiment, a pneumatic slip ring 16 is sleeved on the outer side of the hollow rotating shaft 203; the top of the fixed part of the pneumatic slip ring 16 is connected to the bottom of the connecting flange 14; the bottom of the rotating part of the pneumatic slip ring 16 is connected to the top of the rope drum 10; the pneumatic slip ring 16 is connected to the external air source, and the telescopic cylinder 401 and the rope-releasing cylinder 501 are both connected to the pneumatic slip ring 16 through an air line. The pneumatic slip ring 16 can supply air to the telescopic cylinder 401 and the rope-releasing cylinder 501 while avoiding air line entanglement.

[0050] In this embodiment, the first lifting cylinder 301, the second lifting cylinder 701, the first rope-pulling cylinder 801 and the second rope-pulling cylinder 901 are all rodless cylinders.

[0051] Working principle: 1) Preparation process: the rope released from the rope drum passes through the rope threading hole 11, the pneumatic scissors 12, the first pneumatic clamping finger 302, and the fixed rope frame 702, and is clamped by the third pneumatic clamping finger 13, that is, the rope is fixed in a straight line in the vertical direction, and its head end is clamped. After being pulled, the rope can be released from the rope drum; 2) Closing process: put the woven bag filled with items into the middle of the first closing splint 604 and the second closing splint 605, the two-way cylinder 603 drives the first closing splint 604 and the second closing splint 605 to move relative to each other and clamp the bag mouth, the lifting cylinder 601 lifts the bag mouth of the woven bag through the lifting column 602 and the two-way cylinder 603, and puts it into the winding 3) Rope winding process: the motor 201 drives the hollow rotating platform 202 to rotate one circle, and then drives the rope winding drum 10 to rotate one circle. As the rope winding drum 10 rotates, the dynamic mixing rope frame 402 fixed inside it also rotates; when the dynamic mixing rope frame 402 rotates, it hangs on the rope from the opening of the fixed mixing rope frame 702 and drives it to rotate together. The rope forms a double-strand rope under the action of the dynamic mixing rope frame 402 and the fixed mixing rope frame 702. The double-strand rope is wound on the outer surface of the rope winding drum 10, completing the rope winding process; 4) Rope pulling and knotting process: after the rope is wound around the rope winding drum 10, the fixed mixing rope frame 702 is driven downward by the second lifting cylinder 701. Movement, then, the rotating finger cylinder 802 is extended out under the drive of the first rope-pulling cylinder 801, and then the rotating finger cylinder 802 clamps the upper strand of the double-strand rope through the first rope-pulling clamping finger 803, the first rope-pulling cylinder 801 drives the rotating finger cylinder 802 to retreat, drives the upper strand of the rope to pass through the rope ring and form an upper strand rope ring, the rotating finger cylinder 802 drives the first rope-pulling clamping finger 803 to rotate 90°, the second lifting cylinder 701 resets and drives the fixed mixing rope frame 702 to move upward, finally, the second rope-pulling air 901 drives the second pneumatic clamping finger 903 to extend out, the second pneumatic clamping finger 903 drives the second rope-pulling clamping finger 903 to clamp the lower strand of the double-strand rope, the second rope-pulling air 901 The second pneumatic clamping finger 903 is driven to retract and drive the lower strand rope to pass through the rope ring of the upper strand rope. At the same time, the rotating finger cylinder 802 controls the first rope-picking clamping finger 803 to loosen the upper strand rope and reset it, completing the rope-picking and knotting process; 5) Tightening process: the telescopic cylinder 401 drives the dynamic rope mixing frame 402 to retract into the interior of the rope winding drum 10, and the three rope-removing cylinders 501 extend to drive the three rope-removing pressure plates 502 to press downward, driving the rope to come off the outer wall of the rope winding drum 10 and fall onto the bag mouth. Then, the first pneumatic clamping finger 302 clamps the rope and moves upward driven by the first lifting cylinder 301 to complete the tightening process; 6) Cutting process: the rope is cut by the pneumatic scissors 12 to complete the cutting process;7) Rope-renewing process: The first pneumatic clamping finger 302 clamps the rope end and drives the rope end to move downward to a preset position through the first lifting cylinder 301, and then the third pneumatic clamping finger 13 and the first pneumatic clamping finger 302 act alternately (the third pneumatic clamping finger 13 clamps the rope end, while the first pneumatic clamping finger 302 releases the rope end) to complete the fixing of the rope end, thereby completing the rope-renewing process, and thus completing all processes. ;

[0052] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A step-by-step automatic tying machine for woven bags, characterized in that: include: A frame (1); a rotating mechanism (2) is provided on the top of the frame (1); an output end of the rotating mechanism (2) is connected to a rope drum (10); a first rope mixing mechanism (4), a rope removing mechanism (5) and a closing mechanism (6) are provided inside the rope drum (10); a rope cutting mechanism, a second rope mixing mechanism (7) and a rope end fixing mechanism are provided on one side of the frame (1) from top to bottom, which are opposite to the rope drum (10); a first rope pulling mechanism (8) and a second rope pulling mechanism (9) are provided on one side of the second rope mixing mechanism (7), and a rope feeding mechanism (3) is provided on the other side of the second rope mixing mechanism (7); the first rope pulling mechanism (8), the second rope pulling mechanism (9) and the rope feeding mechanism (3) are all arranged on the frame (1); a rope threading hole (11) corresponding to the rope end fixing mechanism is provided on the top of the frame (1); The rotating mechanism (2) comprises a motor (201), a hollow rotating platform (202) and a hollow rotating shaft (203); the hollow rotating platform (202) is fixedly connected to the top of the frame (1) via a connecting flange (14); the output end of the motor (201) is connected to the input end of the hollow rotating platform (202); the hollow rotating shaft (203) is connected to the output end of the hollow rotating platform (202); the rope drum (10) is connected to the bottom of the hollow rotating shaft (203); The closing mechanism (6) comprises a lifting cylinder (601), a lifting column (602), a two-way cylinder (603), a first closing clamp (604) and a second closing clamp (605); the lifting cylinder (601) is connected to the top of the hollow rotating platform (202) via a cylinder bracket (15); one end of the lifting column (602) is connected to the output end of the lifting cylinder (601); the other end of the lifting column (602) passes through the middle cavity of the hollow rotating platform (202) and the hollow rotating shaft (203) and is connected to the top of the two-way cylinder (603); the first closing clamp (604) and the second closing clamp (605) are respectively connected to the output ends on both sides of the two-way cylinder (603); The first rope mixing mechanism (4) comprises a telescopic cylinder (401) and a dynamic rope mixing frame (402); the telescopic cylinder (401) is connected to the inner top wall of the rope winding drum (10); the dynamic rope mixing frame (402) is connected to the output end of the telescopic cylinder (401); the bottom of the dynamic rope mixing frame (402) extends out of the rope winding drum (10); The second rope mixing mechanism (7) comprises a second lifting cylinder (701) and a fixed rope mixing frame (702); the second lifting cylinder (701) is connected to the frame (1); and the fixed rope mixing frame (702) is connected to the output end of the second lifting cylinder (701).

2. The step-by-step automatic tying machine for woven bags according to claim 1 is characterized in that: The rope-off mechanism (5) comprises a rope-off cylinder (501) and a rope-off pressure plate (502); the rope-off cylinder (501) is connected to the inner wall of the rope-winding drum (10); the rope-off pressure plate (502) is connected to the output end of the rope-off cylinder (501); the rope-winding drum (10) is provided with a rope-off groove corresponding to the rope-off pressure plate (502); the rope-off pressure plate (502) passes through the rope-off groove and extends to the outside of the rope-winding drum (10).

3. The step-by-step automatic tying machine for woven bags according to claim 1 is characterized in that: The rope feeding mechanism (3) comprises a first lifting cylinder (301) and a first pneumatic clamping finger (302); the first lifting cylinder (301) is connected to the frame (1); and the first pneumatic clamping finger (302) is connected to the output end of the first lifting cylinder (301).

4. The step-by-step automatic tying machine for woven bags according to claim 1 is characterized in that: The first rope-pulling mechanism (8) comprises a first rope-pulling cylinder (801), a rotating finger cylinder (802) and a first rope-pulling clamping finger (803); the first rope-pulling cylinder (801) is connected to the frame (1); the first rope-pulling cylinder (801) is arranged obliquely to the central axis of the rope winding drum (10); the rotating finger cylinder (802) is connected to the output end of the first rope-pulling cylinder (801); and the first rope-pulling clamping finger (803) is connected to the output end of the rotating finger cylinder (802).

5. A step-by-step automatic tying machine for woven bags according to any one of claims 1 or 4, characterized in that: The second rope-pulling mechanism (9) is arranged on a side of the first rope-pulling mechanism (8) close to the rope drum (10); the second rope-pulling mechanism (9) comprises a second rope-pulling cylinder (901), a second pneumatic clamping finger (902) and a second rope-pulling clamping finger (903); the second rope-pulling cylinder (901) is connected to the frame (1); the second rope-pulling cylinder (901) is arranged perpendicular to the central axis of the rope drum (10); the second pneumatic clamping finger (902) is connected to the output end of the second rope-pulling cylinder (901); and the second rope-pulling clamping finger (903) is connected to the output end of the second pneumatic clamping finger (902).

6. The step-by-step automatic tying machine for woven bags according to claim 1, characterized in that: The rope cutting mechanism is a pneumatic scissors (12); and the rope end fixing mechanism is a third pneumatic clamping finger (13).

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