A film blowing machine receiving device for express bag production and its process

Abstract

The present invention relates to the technical field of winding devices, and specifically discloses a material receiving device of a film blowing machine for express bag production and a process thereof, comprising a support frame, two winding rollers arranged at two ends of the support frame, a cutting knife and an open-loop track coaxially arranged with the winding roller, protrusions are arranged at both ends of the open-loop track, and a rotatable rolling shaft that travels along the open-loop track is provided on the open-loop track, and when the rolling shaft moves from one end of the open-loop track to the other end, the cut film is adhered to the rolling shaft for winding, and when the rolling shaft enters the open-loop track from the protrusion, the film is pressed against the winding roller, and when the rolling shaft enters the protrusion from the open-loop track, the rolling shaft is out of contact with the film; when the present invention cuts the film, the cut end of the film can be pressed and wound on the winding drum, and when the winding drum that has been wound is exchanged with the winding drum to be wound, the diameter of the winding roller that has been wound is reduced to facilitate the disassembly of the film roll.

Description

Technical Field

[0001] The present invention relates to the technical field of winding devices, and in particular to a material receiving device of a film blowing machine for producing express bags and a process thereof. Background Art

[0002] Courier bags refer to bags used for packaging documents, receipts, materials, goods, etc. in the express delivery industry. They are also called express bags, mailing bags, and express packaging bags. Among them, plastic courier bags made of polyethylene are more commonly used. They are low cost, easy to use, and have good waterproof properties. In the prior art, during the production process of courier bags, the staff will reel up the finished courier bags through a reeling and unreeling mechanism.

[0003] For example, a Chinese patent document with the announcement number CN117342315B discloses a winding device of a film blowing machine, including a spare roller frame, a winding roller frame, a tension roller and a plurality of guide rollers. The spare roller frame is provided with a film cutting tool, the spare roller frame is provided with a roller pushing rod, the winding roller frame is provided with a positioning groove, and the winding roller frame is provided with a fan. The patent document installs the tool and the roller pushing rod on the spare roller frame. By pulling down the spare roller frame, the winding roller can be pushed away from the tension roller and the film can be cut at the same time. The wind force of the fan is used to lift the cut end surface of the film and wrap it around the spare roller, which reduces the difficulty of manual roll changing. The tool falls from the top of the film to avoid the head and tail tilting caused by side cutting.

[0004] In the above patent document, by setting up components such as a spare roller frame, a winding roller frame, a tension roller and several guide rollers, the film is wound around the winding roller during the winding process. After the film is cut, the above technical solution uses the wind force of the fan to wind the film around the winding roller. In the actual production process, if the tension of the film is large, at the moment the film is cut, the film will move rapidly to both sides from the cutting point due to its own elastic force. When the film is blown by the blowing force of the fan, the film may not be lifted up in time and wound around the drum. Summary of the invention

[0005] The present invention provides a material receiving device of a film blowing machine for producing express bags and a process thereof, aiming to solve the problem in the prior art that a film may fall off a winding roller when the winding roller is replaced in a winding device.

[0006] A film blowing machine receiving device for express bag production, comprising a support frame, two winding rollers and a cutting knife arranged at both ends of the support frame, and also comprising: an open-loop track coaxially arranged with the winding roller, protrusions are arranged at both ends of the open-loop track, and a rotatable rolling shaft is arranged on the open-loop track and moves along the open-loop track, when the rolling shaft moves from one end of the open-loop track to the other end, the cut film is attached to the rolling shaft for winding, when the rolling shaft enters the open-loop track from the protrusion, the film is pressed on the winding roller, when the rolling shaft enters the protrusion from the open-loop track, the rolling shaft is out of contact with the film, and a driving component is also installed on the support frame, which is used to move the rolling shaft in the front-rear direction;

[0007] A support rod slides in the radial direction of the winding roller, and two pushing members rotatably arranged on the support frame for driving the rotating wheel to rotate; a groove extending from the axis to the edge is provided on the rotating wheel, and the end of the support rod slides in the groove. The support rod rotates around its own center to exchange the positions of the two winding rollers. During this process, the rotating wheel on the winding roller that has been wound up contacts the two pushing members in turn, so that the rotating wheel rotates clockwise and then counterclockwise.

[0008] The beneficial effects of the present invention are as follows: when the film is cut, the cut end of the film can be pressed and rolled up on the winding drum, and when the wound winding drum is exchanged with the winding drum to be wound up, the diameter of the wound winding roller is reduced to facilitate the disassembly of the film roll.

[0009] Preferably, the pushing member comprises two arcuate rods, an arcuate rack is provided on the outer arcuate surface of the arcuate rod, and a gear ring meshing with the arcuate rack is provided on the rotating wheel; the rotating wheel rotates through the meshing of the arcuate rack and the rotating wheel.

[0010] Preferably, the driving assembly includes a driving motor installed on a support frame, a screw is installed at the movable end of the driving motor, the screw is arranged along the front-to-back direction, the open-loop track is threadedly connected to the screw, and a guide rod is also installed on the support frame, which is arranged along the front-to-back direction and passes through the open-loop track; the rolling shaft is driven to move forward and backward by the driving assembly.

[0011] Preferably, a walking mechanism is provided on the open-loop track, the walking mechanism includes a support frame and electric walking wheels clamped on the inner and outer side walls of the open-loop track, and the rolling shaft is installed on the support frame; the rolling shaft is driven to move by the walking mechanism.

[0012] Preferably, the support frame is arranged on a support platform, and a servo motor is also installed on the support platform. The support frame is installed at the output end of the servo motor, and the support frame is driven to rotate by the servo motor; the support frame is driven to rotate by the rotation of the servo motor.

[0013] Preferably, the support platform is also equipped with an electric telescopic rod, and the cutting knife is installed at the output end of the electric telescopic rod. The cutting knife is driven by the extension and retraction of the electric telescopic rod to cut the film; the cutting knife is driven by the telescopic rod to cut the film.

[0014] Preferably, a flexible coupling is connected between the rotating wheel and the support frame; when the rotating wheel is not subjected to force, the rotating wheel can remain relatively still with the support frame.

[0015] Preferably, movable rods are fixedly provided on both the front and rear sides of the winding roller, a slot is provided at the output end of the servo motor, a spring that can abut against the slot is installed on the movable rod, and both the movable rod and the slot are square; thus, the winding roller can be easily disassembled.

[0016] A material receiving process of a film blowing machine for producing express bags, using the above-mentioned material receiving device of the film blowing machine for producing express bags, comprises the following steps:

[0017] S1, rewinding is performed by the rewinding roller on the left, and the rewinding roller on the right is in a state of waiting for rewinding;

[0018] S2, after the left winding roller is wound up, the film is cut by the cutting knife, and then the walking mechanism drives the rolling shaft to move on the open-loop track to wind the cut film around the winding roller;

[0019] S3, when the support frame rotates to exchange the positions of the two winding rollers, the rotating wheel contacts a pusher successively, so that the support rod moves toward the axis of the rotating wheel to facilitate the removal of the wound film roll;

[0020] S4. After the film is removed, the winding roller is installed on the support frame again. When the support frame rotates, it contacts another pushing member to reset the support rod. After the support frame rotates 180 degrees, the winding roller after the film roll is removed is in a state of waiting for winding.

[0021] Beneficial effects:

[0022] After the film is cut, it is pressed by the rolling shaft to prevent the film from deviating. The walking mechanism drives the rolling shaft to move so that the film can be first wound at a certain angle on the winding roller 2 to be wound. After cutting, the winding roller and the rolling shaft rotate synchronously to ensure that the film is wound on the winding roller. When the winding roller that has been wound is exchanged with the winding roller to be wound, the diameter of the wound winding roller is reduced, which facilitates the disassembly of the film roll.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0024] 1. The traveling mechanism drives the winding roller from the protrusion into the open-loop track, and the traveling mechanism drives the rolling shaft to press the cut film. Then, the traveling mechanism moves from the head end to the tail end of the open-loop track to wind the film on the winding roller to be wound. Then, the film is cut by the cutting knife. As the winding roller and the rolling shaft rotate, the cut film is completely wound onto the winding roller.

[0025] 2. The support frame is driven to rotate by the rotation of the servo motor. After the support frame rotates a certain angle, the rotating wheel contacts a pushing member, causing the rotating wheel to rotate a certain angle, thereby causing the support rod to slide a certain distance toward the axis of the rotating wheel. At this time, the support rod no longer supports the inner core of the film roll to facilitate the disassembly of the wound film roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure when the traveling mechanism of the present invention moves to the tail end of the open-loop track.

[0028] Figure 3 It is a schematic diagram of the structure when the walking mechanism of the present invention moves to the protrusion connected to the tail of the open-loop track.

[0029] Figure 4 It is a schematic diagram of the structure in which the rolling shaft of the present invention is moved away from the film roll.

[0030] Figure 5 It is a schematic diagram of the structure of the rolling shaft pressing on the film roll of the present invention.

[0031] Figure 6 It is a schematic diagram of the structure of the coordination of the winding roller, the support rod and the open-loop track of the present invention.

[0032] Figure 7 It is a schematic cross-sectional structural diagram of the winding roller of the present invention.

[0033] Figure numerals: 1. support frame; 11. support platform; 12. servo motor; 2. winding roller; 21. support rod; 22. rotating wheel; 23. slot; 24. pushing member; 241. arc rod; 242. arc rack; 243. gear ring; 25. rotating motor; 3. open-loop track; 31. protrusion; 32. rolling shaft; 4. driving assembly; 41. driving motor; 42. lead screw; 43. guide rod; 5. walking mechanism; 51. support frame; 52. electric walking wheel; 61. movable rod; 62. slot; 63. spring; 7. cutting knife. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figure 1-Figure 7 As shown, in the first embodiment of the present invention, a material receiving device of a film blowing machine for producing express bags includes a support frame 1, two winding rollers 2 respectively installed at both ends of the support frame 1, and a cutting knife 7 for cutting a film.

[0036] In a specific embodiment of the present invention, the support frame 1 is arranged on a support platform 11, and a servo motor 12 is also installed on the support platform 11. The support frame 1 is installed at the output end of the servo motor 12; the rotation of the servo motor 12 drives the support frame 1 to rotate and then drives the support frame 1 to rotate. When winding, the winding roller 2 on the left is used for winding, and the winding roller 2 on the right is in a standby state. After the winding of the winding roller 2 on the left is completed, the support frame 1 rotates 180 degrees to exchange the positions of the left and right winding rollers 2, so that the winding roller 2 to be wound is rotated to the left side for winding, and the winding roller 2 that has been wound is rotated to the position to be wound. Before the position is exchanged, the film is cut by the cutting knife 7, and the cut film is wound around the winding roller 2 to be wound. During the position exchange process, the express bag on the wound winding roller 2 that has been wound is removed.

[0037] Specifically, an electric telescopic rod is installed on the support platform 11, and the cutting knife 7 is installed at the output end of the electric telescopic rod. The cutting knife 7 is driven to move by the extension and retraction of the electric telescopic rod to cut the film.

[0038] An open-loop track 3 is coaxially arranged on each winding roller 2, on which a traveling mechanism 5 is provided, on which a rolling shaft 32 is installed, and protrusions 31 are provided at both ends of the open-loop track 3; in the initial position, the protrusion 31 at the head end of the open-loop track 3 on the winding roller 2 to be wound is vertically upward, and the protrusion 31 provided at the tail end of the open-loop track 3 extends horizontally to the right, and there is an arc-shaped fillet between the protrusion 31 and the open-loop track 3 so that the traveling mechanism 5 can move smoothly between the protrusion 31 and the open-loop track 3.

[0039] When the film is rolled up on the left side of the winding roller 2, the walking mechanism 5 on the right side drives the rolling shaft 32 to move downward until the rolling shaft 32 presses the film onto the winding roller 2 on the right side. At this time, the walking mechanism 5 just enters the open-loop track 3, and the walking mechanism 5 moves from the head end of the open-loop track 3 to the tail end to wind the film around the winding roller 2 on the right side. During this process, the left winding roller 2 stops rotating. In the process of winding the film around the right winding roller 2 through the rolling shaft 32, the left winding roller 2 will rotate in the opposite direction by a certain angle to avoid deformation of the film due to the extrusion force. After the walking mechanism 5 moves to the tail end of the open-loop track 3, the cutting knife 7 cuts the film. The winding roller 2 on the right side rotates at this time, and the rolling shaft 32 also rotates to convey the cut film in the winding direction of the winding roller 2 until the cut part of the film is completely rolled up on the winding roller 2. At this time, the walking mechanism 5 drives the rolling shaft 32 to move to the protrusion 31 connected to the tail of the winding roller 2. The walking mechanism 5 includes a support frame 51 and electric walking wheels 52 clamped on the inner and outer side walls of the open-loop track 3, and the rolling shaft 32 is installed on the support frame 51; when the electric walking wheels 52 walk between the open-loop track 3 and the protrusion 31, the rolling shaft 32 moves synchronously with the walking mechanism 5.

[0040] The support frame 1 is provided with a rotating motor 25, and the winding roller 2 is provided at the output end of the rotating motor 25. The rotating motor 25 drives the winding roller 2 to rotate and then winds the film. The rolling shaft 32 is an electric roller shaft, and the electric roller shaft can rotate.

[0041] The support frame 1 is also equipped with a driving component 4. After the film is wound around the winding roller 2 on the right side for several turns, the driving component 4 drives the rolling shaft 32 to move away from the winding roller 2. After the rolling shaft 32 is out of contact with the winding roller 2, the servo motor 12 drives the support frame 1 to rotate counterclockwise so that the two winding rollers 2 exchange positions.

[0042] In a specific embodiment of the present invention, the driving assembly 4 includes a driving motor 41 installed on the support frame 1, and a screw 42 is installed at the movable end of the driving motor 41. The screw 42 is arranged in the front-to-back direction, and the open-loop track 3 is threadedly connected to the screw 42. A guide rod 43 is also installed on the support frame 1, which is arranged in the front-to-back direction and passes through the open-loop track 3; the rotation of the driving motor 41 drives the screw 42 to rotate, thereby moving the open-loop track 3 in the front-to-back direction, thereby driving the rolling shaft 32 to move toward the film or break away from contact with the film.

[0043] In other embodiments of the present invention, the driving component 4 can also be an electric telescopic rod (not shown in the figure), and the open-loop track 3 is fixed at the output end of the electric telescopic rod; the open-loop track 3 is driven to move along the front-rear direction by the extension and retraction of the electric telescopic rod.

[0044] The winding roller 2 is provided with a support rod 21 for sliding in the radial direction, and each winding roller 2 is provided with a rotating wheel 22 rotating on the support frame 1 on both the front and rear sides, and a slot 23 extending from the axis to the edge is provided on the rotating wheel 22, and the end of the support rod 21 slides in the slot 23, and a pusher 24 for pushing the rotating wheel 22 to rotate is installed on the support platform 11; when the two winding rollers 2 are replaced, the support frame 1 is driven to rotate in the counterclockwise direction by the rotation of the servo motor 12, and two pushers 24 are arranged along the rotation direction of the support frame 1, and the two pushers 24 are successively connected with the rotating wheel The outer side and the inner side of 22 are in contact so that the rotating wheel 22 rotates clockwise first and then counterclockwise. When the rotating wheel 22 rotates clockwise by a certain angle, the support rod 21 slides along the radial direction of the rotating wheel 22. At this time, the support rod 21 no longer supports the inner core of the wound film roll, so as to facilitate the operator to disassemble the inner wall of the wound film. After the cutting knife 7 cuts the film, the wound winding roller 2 can be rotated by a certain angle to completely wind up the cut film. After the winding is completed, the operator sticks the end of the film to avoid the wound film roll from being scattered again.

[0045] After the film roll is removed, the winding roller 2 is installed again at the output end of the driving motor 41. When the support frame 1 rotates to drive the rotating wheel 22 to contact the other pushing member 24, the rotating wheel 22 rotates counterclockwise to make the support rod 21 slide in the direction away from the axis of the rotating wheel 22 until the support rod 21 slides to the end on the other side of the slot 23, and then the support frame 1 rotates again by a certain angle to complete the position exchange of the two winding rollers 2.

[0046] In a preferred embodiment of the present invention, the pushing member 24 includes two arc-shaped rods 241, an arc-shaped rack 242 is provided on the outer arc surface of the arc-shaped rod 241, and a gear ring 243 meshing with the arc-shaped rack 242 is provided on the rotating wheel 22; the support frame 1 rotates to drive the outer side of the gear ring 243 to contact the arc-shaped rack 242, thereby causing the gear ring 243 to rotate clockwise, and then the support frame 1 drives the inner side of the gear ring 243 to contact another arc-shaped rack 242, thereby causing the gear ring 243 to rotate counterclockwise.

[0047] In other embodiments of the present invention, the pushing member 24 may also only include the arc-shaped rod 241 . When the rotating wheel 22 contacts the arc-shaped rod 241 , the friction force therebetween causes the rotating wheel 22 to rotate.

[0048] The rotating wheel 22 and the support frame 1 are connected by a flexible coupling so that a certain circumferential torsional force is required between the two to make the rotating wheel 22 rotate on the support frame 1. When no force is applied to the rotating wheel 22, the rotating wheel 22 and the support frame 1 will not rotate relative to each other, and the force applied by the pushing member 24 to the rotating wheel 22 is greater than the force required for the rotating wheel 22 to rotate on the support frame 1.

[0049] In a specific embodiment of the present invention, the top of the support rod 21 is arranged in an arc shape, so that the winding roller 2 can wind the film in a circular shape as much as possible, so that the wound film is rolled into a regular shape.

[0050] To facilitate the disassembly of the winding roller 2, a movable rod 61 is fixedly provided on the front and rear sides of the winding roller 2, a slot 62 is opened at the output end of the servo motor 12, and a spring 63 that can abut against the slot 62 is installed on the movable rod 61. The movable rod 61 and the slot 62 are both square. When the movable rod 61 is inserted into the slot 62, no relative rotation occurs between the two. When installing the movable rod 61, first insert the movable rod 61 on one side into the slot 62 so that the movable rod 61 on the other side can be inserted into the slot 62. When the movable rods 61 on both sides are inserted into the slot 62, the spring 63 is in a compressed state. When disassembling the winding roller 2, first push the movable rod 61 to move forward to disassemble the movable rod 61 at the rear and then disassemble the winding roller 2.

[0051] Working principle of the present invention:

[0052] When the express bag film is rolled up, the express bag film is first rolled up on the winding roller 2 on the left, and the winding roller 2 on the right is in a state of waiting to be rolled up. When the winding roller 2 on the left is rolled up, the walking mechanism 5 drives the winding roller 2 from the protrusion 31 into the open-loop track 3, and the walking mechanism 5 drives the rolling shaft 32 to press the cut film, and then the walking mechanism 5 moves from the head end to the tail end of the open-loop track 3 to make the film wound on the winding roller 2 to be rolled up, and then the film is cut by the cutting knife 7. As the winding roller 2 and the rolling shaft 32 rotate, the cut film is completely rolled up onto the winding roller 2, and then the rolling shaft 32 enters the protrusion 31 connected to the tail end from the tail end of the winding roller 2 to avoid the rolling shaft 32 affecting the winding of the film by the winding roller 2 when the thickness of the film on the winding roller 2 increases. After the cut film is wound on the winding roller 2, the rotation of the servo motor 12 drives the support frame 1 to rotate. After the support frame 1 rotates a certain angle, the rotating wheel 22 contacts a pushing member 24, causing the rotating wheel 22 to rotate a certain angle, thereby causing the support rod 21 to slide a certain distance toward the axis of the rotating wheel 22. At this time, the support rod 21 no longer supports the inner core of the film roll to facilitate the disassembly of the wound film roll, and does not affect the winding of the other winding roller 2 during disassembly. After the film roll on the winding roller 2 is disassembled, the winding roller 2 is installed on the support rod 21, and the support rod 21 continues to rotate a certain angle and contacts another pushing member 24, causing the rotating wheel 22 to rotate in the opposite direction by a certain angle, so that the support rod 21 is reset, and the support rod 21 continues to rotate to complete the position exchange of the two winding rollers 2.

[0053] A material receiving process of a film blowing machine for producing express bags, using the above-mentioned material receiving device of the film blowing machine for producing express bags, comprises the following steps:

[0054] S1, winding is performed by the winding roller 2 on the left, and the winding roller 2 on the right is in a state of waiting for winding;

[0055] S2, after the left winding roller 2 is wound up, the traveling mechanism 5 drives the rolling shaft 32 to move on the open-loop track 3 to wind the cut film around the winding roller 2, and then the film is cut by the cutting knife 7;

[0056] S3, during the process of the support frame 1 rotating to exchange the positions of the two winding rollers 2, the rotating wheel 22 successively contacts with a pusher 24, so that the support rod 21 moves toward the axis of the rotating wheel 22 to facilitate the removal of the wound film roll;

[0057] S4. After removing the film, the winding roller 2 is installed on the support frame 1 again. When the support frame 1 rotates, it contacts another pushing member 24 to reset the support rod 21. After the support frame 1 rotates 180 degrees, the winding roller 2 after removing the film roll is in a state to be wound.

[0058] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A film blowing machine receiving device for producing express bags, comprising a support frame (1), two winding rollers (2) arranged at both ends of the support frame (1) and a cutting knife (7), characterized in that: Also includes: An open-loop track (3) is coaxially arranged with the winding roller (2), and protrusions (31) are provided at both ends of the open-loop track (3). A rotatable rolling shaft (32) is provided on the open-loop track (3) and moves along the open-loop track (3). When the rolling shaft (32) moves from one end of the open-loop track (3) to the other end, the cut film is attached to the rolling shaft (32) for winding. When the rolling shaft (32) enters the open-loop track (3) from the protrusion (31), the film is pressed against the winding roller (2). When the rolling shaft (32) enters the protrusion (31) from the open-loop track (3), the rolling shaft (32) is out of contact with the film. A driving assembly (4) is also installed on the support frame (1) for moving the rolling shaft (32) in the front-rear direction. A support rod (21) slides in the radial direction of the winding roller (2), and two pushers (24) are rotatably arranged on the support platform (11) for driving the rotating wheel (22) to rotate; a slot (23) extending from the axis to the edge is provided on the rotating wheel (22), and the end of the support rod (21) slides in the slot (23). When the support frame (1) rotates around its own center to exchange the positions of the two winding rollers (2), the rotating wheel (22) on the winding roller (2) that has been wound up successively contacts the two pushers (24), so that the rotating wheel (22) rotates clockwise and then counterclockwise.

2. The material receiving device of a film blowing machine for producing express bags according to claim 1, characterized in that: The pushing member (24) comprises two arc-shaped rods (241), an arc-shaped rack (242) is provided on the outer arc surface of the arc-shaped rod (241), and a gear ring (243) meshing with the arc-shaped rack (242) is provided on the rotating wheel (22).

3. The material receiving device of a film blowing machine for producing express bags according to claim 1, characterized in that: The drive assembly (4) comprises a drive motor (41) mounted on a support frame (1); a lead screw (42) is mounted on a movable end of the drive motor (41); the lead screw (42) is arranged in a front-to-rear direction; the open-loop track (3) is threadedly connected to the lead screw (42); and a guide rod (43) is also mounted on the support frame (1) and is arranged in a front-to-rear direction and passes through the open-loop track (3).

4. The material receiving device of a film blowing machine for producing express bags according to claim 1, characterized in that: A walking mechanism (5) is provided on the open-loop track (3), the walking mechanism (5) comprising a support frame (51) and electric walking wheels (52) clamped on inner and outer side walls of the open-loop track (3), and the rolling shaft (32) is mounted on the support frame (51).

5. The material receiving device of a film blowing machine for producing express bags according to claim 1, characterized in that: The support frame (1) is arranged on a support platform (11), a servo motor (12) is also installed on the support platform (11), and the support frame (1) is installed at the output end of the servo motor (12), and the support frame (1) is driven to rotate by the servo motor (12).

6. The material receiving device of the film blowing machine for producing express bags according to claim 5, characterized in that: The support platform (11) is also equipped with an electric telescopic rod, and the cutting knife (7) is installed at the output end of the electric telescopic rod. The cutting knife (7) is driven to move by the extension and retraction of the electric telescopic rod, thereby cutting the film.

7. The material receiving device of a film blowing machine for producing express bags according to claim 1, characterized in that: A flexible coupling is connected between the rotating wheel (22) and the support frame (1).

8. The material receiving device of a film blowing machine for producing express bags according to claim 5, characterized in that: A movable rod (61) is fixedly provided on both the front and rear sides of the winding roller (2); a slot (62) is provided at the output end of the servo motor (12); a spring (63) is mounted on the movable rod (61) and can abut against the slot (62); and both the movable rod (61) and the slot (62) are square.

9. A material receiving process of a film blowing machine for producing express bags, using the material receiving device of a film blowing machine for producing express bags according to any one of claims 1 to 8, comprising the following steps: S1, reeling is performed by the reeling roller (2) on the left, and the reeling roller (2) on the right is in a state of waiting for reeling; S2, after the left winding roller (2) has finished winding, the film is cut by the cutting knife (7), and then the walking mechanism (5) drives the rolling shaft (32) to move on the open-loop track (3) to wind the cut film onto the winding roller (2); S3, when the support frame (1) rotates to exchange the positions of the two winding rollers (2), the rotating wheel (22) successively contacts a pusher (24), so that the support rod (21) moves toward the axis of the rotating wheel (22) to facilitate the removal of the wound film roll; S4. After the film is removed, the winding roller (2) is mounted on the support frame (1) again. When the support frame (1) rotates, it contacts another pushing member (24) to reset the support rod (21). After the support frame (1) rotates 180 degrees, the winding roller (2) after the film roll is removed is in a state ready for winding.

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