An embracing film cutting device and method

Abstract

The present invention discloses an embracing film cutting device and method, which are mainly used in the silk production line of a tobacco factory. Its main function is to cut the plastic film bags of cigarette packs in one go to meet subsequent process requirements. The cutting device includes a frame, with a set of long-side film cutting devices on each of the left and right sides of the frame, and a set of short-side film cutting devices on each of the front and rear sides of the frame. A lifting device is provided on the four longitudinal pillars of the frame. The long-side film cutting device and the short-side film cutting device are installed on the top of the lifting device. A pneumatic system is provided at the front end of the frame. The pneumatic system is connected to the long-side film cutting device, the short-side film cutting device, and the pneumatic components on the lifting device. The embracing film cutting device provided by the present invention can adapt to the skewness of the cigarette pack, has a simple and reliable structure, and has high film cutting efficiency and success rate.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco equipment, and in particular to an embracing film cutting device and method. Background Art

[0002] Currently, automated opening of re-cured tobacco bales has become a major trend in tobacco processing automation, significantly improving production efficiency and working conditions. Automated film cutting of unpacked tobacco bales, wrapped in plastic film, is a crucial component of automated opening systems. This function cuts the film, facilitating subsequent removal. To ensure efficient film removal, automated opening systems often include a film cutting station.

[0003] Some existing special machines for automatic film cutting in China mostly adopt a gantry structure, which cuts the long and short sides of the plastic film of the cigarette package in stages. In this working mode, the long-side film cutting device and the short-side film cutting device are separately set, and the film cutting work is carried out separately. When the cigarette package is skewed, the plastic film cannot be pressed tightly, resulting in misaligned cutting positions and uncut films. The success rate of film cutting is low, which increases the difficulty of subsequent film removal and low work efficiency.

[0004] Therefore, developing a film cutting machine that can cut the film simultaneously and reliably is a key link in the automatic packaging system. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an embracing film cutting device and method that can complete the film cutting process in one go and improve work efficiency; the film can be completely compressed during film cutting and the success rate of film cutting is high; the structure is simple and compact and the maintenance is convenient.

[0006] The present invention is achieved through the following technical solutions:

[0007] An embracing film cutting device, comprising: a frame, at least four lifting devices, two sets of long-side film cutting devices, two sets of short-side film cutting devices and a pneumatic system;

[0008] The frame is a square frame structure;

[0009] The two sets of long edge film cutting devices are respectively arranged on the left and right sides of the frame and installed on a lifting device, and are used to cut the long edges of the plastic film of the cigarette package;

[0010] The two sets of short-edge film cutting devices are respectively arranged on the front and rear sides of the frame and installed on a lifting device, and are used to cut the short edges of the plastic film of the cigarette package;

[0011] The at least four lifting devices are respectively arranged on the four longitudinal pillars of the frame;

[0012] The pneumatic system is arranged on the front side of the frame and is used to provide air pressure power to the pneumatic components of the long-side film cutting device, the short-side film cutting device and the lifting device.

[0013] A further solution is that the long-side film cutting device and the short-side film cutting device have similar structures, including a cantilever bracket, a film cutting telescopic assembly is provided on the cantilever bracket, a swing assembly is provided on the film cutting telescopic assembly, a tool holder sliding cylinder is provided on the swing assembly, a film cutting tool holder is provided on the slider of the tool holder sliding cylinder, and a film pressing plate is provided at the front end of the tool holder sliding cylinder.

[0014] A further solution is that the film cutting telescopic assembly includes a telescopic guide rail arranged above the cantilever bracket, a sliding connecting plate is slidably arranged above the telescopic guide rail, the swing assembly is arranged on the sliding connecting plate, and a film pressing cylinder is arranged below the sliding connecting plate.

[0015] A further solution is that a spring screw device is provided behind the tool holder sliding cylinder, a limit plate is provided on the sliding connecting plate of the film cutting telescopic assembly, the limit plate is provided with a limit waist-shaped hole, and the screw end of the spring screw device passes through the limit waist-shaped hole.

[0016] A further solution is that when the film cutting telescopic assembly is working, the swinging assembly and the knife holder sliding cylinder, film cutting knife holder and film pressing plate above it swing with the skewed cigarette pack, and the swinging angle range is the swinging angle range of the spring screw device in the limiting waist-shaped hole of the limiting plate.

[0017] A further solution is that the film cutting tool holder includes a tool mounting plate arranged on a slide block of a tool holder sliding cylinder, a tool swing cylinder is arranged on the tool mounting plate, and a tool is arranged at an output end of the tool swing cylinder.

[0018] A further solution is that the stroke of the knife holder sliding cylinder on the long side film cutting device is greater than the length of the cigarette pack, and the stroke of the knife holder sliding cylinder on the short side film cutting device is greater than the width of the cigarette pack; the length of the film pressing plate on the long side film cutting device is less than the length of the cigarette pack, and the length of the film pressing plate on the short side film cutting device is less than the width of the cigarette pack.

[0019] A further solution is that the lifting device includes a lifting cylinder arranged at the lower part of the longitudinal support of the frame, a lifting support is arranged on the top of the lifting cylinder, the lifting support is slidably arranged on a lifting guide rail, and the lifting guide rail is arranged on the upper part of the longitudinal support of the frame;

[0020] A long side film cutting device mounting plate for mounting the long side film cutting device and a short side film cutting device mounting plate for mounting the short side film cutting device are arranged on the lifting support.

[0021] A further solution is that the pneumatic system includes an air source processing component, a solenoid valve island, and a throttle valve. The air source processing component is connected to a plurality of solenoid valve islands, which are respectively connected to the pneumatic actuators on the long-side film cutting device, the short-side film cutting device, and the lifting device. A throttle valve is provided on the connecting pipeline between the solenoid valve island and each pneumatic actuator;

[0022] The air source processing component is used to adjust the air source pressure and filter air impurities, the solenoid valve island is used to control the action of each pneumatic actuator, and the throttle valve is used to adjust the operating speed of each pneumatic actuator.

[0023] A method for cutting an embracing film comprises the following steps:

[0024] Step 1: After the cigarette pack with plastic film is conveyed by a conveyor belt or manually placed to the film cutting station, the long-side film cutting device and the short-side film cutting device are lowered from the standby position to the working position;

[0025] Step 2: The long-side film cutting device and the short-side film cutting device extend and press the cigarette pack with the plastic film;

[0026] Step 3: The cutters on the long-side film cutting device and the short-side film cutting device simultaneously cut the four sides of the cigarette package plastic film;

[0027] Step 4: The long side film cutting device and the short side film cutting device are retracted to their initial positions;

[0028] Step 5: The cutters on the long-side film cutting device and the short-side film cutting device are retracted. At the same time, the long-side film cutting device and the short-side film cutting device are raised to the standby position, and all components return to their initial state.

[0029] Working principle of the present invention:

[0030] The present invention utilizes four sets of cutting devices to simultaneously cut cigarette packages with plastic film. In one set of cutting devices, a lifting device drives the long-side and short-side film cutting devices to rise and fall, a film pressing cylinder pushes a film pressing plate to press the plastic film of the cigarette package, and the reaction force of the cigarette package on the film pressing plate causes a swinging assembly to swing within a certain range as the cigarette package tilts. The swinging assembly drives the film pressing plate to swing and press the cigarette package, a tool swinging cylinder drives the tool to eject and retract, and a tool holder sliding cylinder drives the tool to cut the plastic film on the cigarette package. The four cutting devices simultaneously cut all four sides of the cigarette package, achieving a one-time cutting of the cigarette package's plastic film.

[0031] The present invention has the following beneficial effects compared with the prior art:

[0032] The present invention adopts an embracing film cutting method. The long-side film cutting device and the short-side film cutting device are raised and lowered simultaneously, and the plastic film of the cigarette package is pressed and cut on all four sides at the same time. The film cutting process is completed in one step, which greatly improves the work efficiency and can meet the needs of large production capacity.

[0033] When the long-side film cutting device and the short-side film cutting device of the present invention press the plastic film, they can adapt to the deviation of the cigarette package within a certain range and automatically press the cigarette package film, thereby achieving a high film cutting success rate.

[0034] The present invention integrates the process of cutting the four sides of the cigarette package plastic film into one work station, the overall structure is simple and reliable, the maintenance amount is small, and the capital cost and labor cost are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0036] Figure 2 It is a schematic diagram of the frame structure of the present invention;

[0037] Figure 3 It is a structural schematic diagram of the long side film cutting device or the short side film cutting device of the present invention;

[0038] Figure 4 Schematic diagram of the movement direction of the film cutting telescopic assembly and the swing assembly of the present invention;

[0039] Figure 5 Schematic diagram of the three-dimensional structure of the film cutting knife holder of the present invention;

[0040] Figure 6 It is a schematic diagram of the three-dimensional structure of the lifting device of the present invention;

[0041] Figure 7 Schematic diagram of the connection of the pneumatic system of the present invention;

[0042] Figure 8 is a flow chart of the cutting method of the present invention;

[0043] Figure 9 This is a schematic diagram of the present invention in use.

[0044] Numbers in the figure:

[0045] 1- rack;

[0046] 2-Long side film cutting device;

[0047] 21-cantilever bracket, 22-film cutting telescopic assembly, 221-telescopic guide rail, 222-sliding connecting plate, 223-film pressing cylinder, 23-swing assembly, 24-knife holder sliding cylinder, 25-film cutting knife holder, 251-mounting plate, 252-tool swing cylinder, 253-tool, 26-film pressing plate, 27-spring screw device, 271-limiting plate;

[0048] 3-Short side film cutting device;

[0049] 4-Lifting device;

[0050] 41-lifting cylinder, 42-lifting support, 421-long side film cutting device mounting plate, 422-short side film cutting device mounting plate, 43-lifting guide rail;

[0051] 5-Pneumatic system;

[0052] 51-air source processing assembly, 52-solenoid valve island, 53-throttle valve;

[0053] 6-Cigarette pack. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the technical solution of the present invention, its specific implementation methods are described in detail below with reference to the accompanying drawings.

[0055] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0056] like Figure 1-7 As shown, an embracing film cutting device includes a frame 1, a long-side film cutting device 2 is provided on each of the left and right sides of the frame 1, a short-side film cutting device 3 is provided on each of the front and rear sides of the frame 1, a lifting device 4 is provided on the four longitudinal pillars of the frame 1, the long-side film cutting device 2 and the short-side film cutting device 3 are installed on the top of the lifting device 4, and a pneumatic system 5 is provided at the front end of the frame 1, and the pneumatic system 5 is connected to the pneumatic components on the long-side film cutting device 2, the short-side film cutting device 3 and the lifting device 4.

[0057] In some embodiments, as Figure 2 As shown, the rack 1 is a square frame structure, which is the supporting component of the entire equipment; the basic structure of the rack 1 is a profile.

[0058] In some embodiments, as Figure 1 、 3 As shown, the long-side film cutting device 2 and the short-side film cutting device 3 have similar structures, differing only in overall length and film cutting stroke, and include a cantilever bracket 21, a film cutting telescopic assembly 22, a swing assembly 23, a tool holder sliding cylinder 24, a film cutting tool holder 25 and a film pressing plate 26. The film cutting telescopic assembly 22 is arranged on the cantilever bracket 21, the swing assembly 23 is arranged above the film cutting telescopic assembly 22, the tool holder sliding cylinder 24 is arranged on the swing assembly 23, the film cutting tool holder 25 is arranged on the slider of the tool holder sliding cylinder 24, and the film pressing plate 26 is arranged at the front end of the tool holder sliding cylinder 24.

[0059] In some embodiments, the cantilever bracket 21 is installed above the lifting supports 42 on two adjacent lifting devices 4, and the cantilever bracket 21 is used to support the film cutting device.

[0060] In some embodiments, as Figure 3 、 4 As shown, the film cutting telescopic assembly 22 includes a telescopic guide rail 221 arranged above the cantilever bracket 21, a sliding connecting plate 222 is slidingly arranged above the telescopic guide rail 221, the swing assembly 23 is arranged on the sliding connecting plate 222, and a film pressing cylinder 223 is arranged below the sliding connecting plate 222. The film pressing cylinder 223 is fixedly installed on the cantilever bracket 21, and the front end of the telescopic rod of the film pressing cylinder 223 is connected to the sliding connecting plate 222. When the telescopic rod of the film pressing cylinder 223 is extended or retracted, it can drive the sliding connecting plate 222 to make a linear reciprocating motion on the telescopic guide rail 221.

[0061] In some embodiments, as Figure 3 As shown, a spring screw device 27 is provided behind the tool holder sliding cylinder 24, and a limiting plate 271 is provided on the sliding connecting plate 222 of the film cutting telescopic assembly 22. The end of the screw of the spring screw device 27 passes through the limiting waist-shaped hole on the limiting plate 271; the spring screw device 27 is a structure in which a spring is sleeved on the screw.

[0062] In some embodiments, as Figure 3 As shown, two spring screw devices 27 are symmetrically arranged behind the tool holder sliding cylinder 24 , and the tool holder sliding cylinder 24 maintains balance under the spring force of the two spring screw devices 27 .

[0063] In some embodiments, as Figure 3 As shown, the spring screw device 27 supports the swing assembly 23. When working, the swing assembly 23 can swing within a certain range along with the tilt of the cigarette pack 6 under the preload force of the spring and the reaction force of the cigarette pack 6. The film pressing plate 26 also swings and presses the plastic film of the cigarette pack 6, making it easier for the tool 253 on the film cutting tool holder 25 to slide and cut the film, preventing the film from moving when the tool 253 cuts the film, causing the film cutting to be invalid and affecting the subsequent equipment operation.

[0064] In some embodiments, when the film cutting telescopic assembly 22 is working, the swing assembly 23 and the knife holder sliding cylinder 24, the film cutting knife holder 25, and the film pressing plate 26 above it swing along with the skewed cigarette pack 6, and the swing angle range is the swing angle range of the spring screw device 27 in the limiting waist-shaped hole of the limiting plate 271.

[0065] In some embodiments, as Figure 3 、 5As shown, the film cutting tool holder 25 includes a tool mounting plate 251 arranged on the slider of the tool holder sliding cylinder 24, a tool swinging cylinder 252 is provided on the tool mounting plate 251, and a tool 253 is provided at the output end of the tool swinging cylinder 252. The tool swinging cylinder 252 can drive the tool 253 to swing left and right along the output shaft of the tool swinging cylinder 252 as the axis. The tool swinging cylinder 252 is used to swing the tool 253 close to or away from the film of the cigarette pack 6.

[0066] In some embodiments, the knife holder sliding cylinder 24 can drive the film cutting knife holder 25 to perform linear reciprocating motion on the knife holder sliding cylinder 24; the stroke of the knife holder sliding cylinder 24 on the long side film cutting device 2 is greater than the length of the cigarette pack 6, and the stroke of the knife holder sliding cylinder 24 on the short side film cutting device 3 is greater than the width of the cigarette pack 6, ensuring that the tool 253 can completely cut the film in four directions of the cigarette pack.

[0067] In some embodiments, the length of the film pressing plate 26 on the long-side film cutting device 2 is less than the length of the cigarette pack 6, and the length of the film pressing plate 26 on the short-side film cutting device 3 is less than the width of the cigarette pack 6, so that when the long-side film cutting device 2 and the short-side film cutting device 3 press the cigarette pack, no collision will occur between adjacent film pressing plates 26.

[0068] In some embodiments, as Figure 2 、 6 As shown, the lifting device 4 includes a lifting cylinder 41 arranged at the lower part of the longitudinal pillar of the frame 1, and a lifting support 42 is arranged on the top of the lifting cylinder 41. The lifting support 42 is slidably arranged on a lifting guide rail 43, and the lifting guide rail 43 is arranged on the upper part of the longitudinal pillar of the frame 1; the lifting cylinder 41 can drive the lifting support 42 to perform vertical lifting movement along the lifting guide rail 43; the lifting guide rail 43 is used to support the lifting support 42 and ensure that the lifting support 42 remains stable during the lifting process.

[0069] In some embodiments, as Figure 6 As shown, the lifting support 42 is provided with a long side film cutting device mounting plate 421 for mounting the long side film cutting device 2 and a short side film cutting device mounting plate 422 for mounting the short side film cutting device 3. The long side film cutting device mounting plate 421 and the short side film cutting device mounting plate 422 are located in the same plane, so that the tool 253 on the long side film cutting device 2 and the tool 253 on the short side film cutting device 3 are in the same plane, ensuring that the positions of the four tools 253 cutting the film are at the same height.

[0070] In some embodiments, as Figure 7As shown, the pneumatic system 5 is installed on the frame 1, including an air source processing component 51, a solenoid valve island 52 and a throttle valve 53. The air source processing component 51 is connected to a plurality of solenoid valve islands 52, and the solenoid valve islands 52 are respectively connected to the pneumatic actuators on the long-side film cutting device 2, the short-side film cutting device 3 and the lifting device 4. A throttle valve 53 is provided on the connecting pipeline between the solenoid valve island 52 and each pneumatic actuator.

[0071] In some embodiments, the air source processing assembly 41 is used to adjust the air source pressure and filter air impurities, the solenoid valve island 52 is used to control the action of each pneumatic actuator, and the throttle valve 53 is used to adjust the operating speed of each pneumatic actuator.

[0072] In some embodiments, as Figure 7 As shown, the air source processing component 51 is connected to four solenoid valve islands 52, and the four solenoid valve islands 52 are respectively connected to the air path of the lifting cylinder 41, the air path of the film pressing cylinder 223, the air path of the tool holder sliding cylinder 24 and the air path of the tool swinging cylinder 252; the extension and retraction of each cylinder are controlled by alternating the air inlet direction and the air outlet direction through the solenoid valve island 52; the air flow rate is controlled by the throttle valve 53, thereby controlling the operating speed of each cylinder.

[0073] A cutting method based on an embracing film cutting device comprises the following steps:

[0074] Step 1: After the cigarette pack with plastic film is conveyed by a conveyor belt or manually placed to the film cutting station, the long-side film cutting device 2 and the short-side film cutting device 3 are lowered from the standby position to the working position;

[0075] Step 2: The long-side film cutting device 2 and the short-side film cutting device 3 extend and press the cigarette pack with the plastic film;

[0076] Step 3: The cutters 253 on the long-side film cutting device 2 and the short-side film cutting device 3 simultaneously cut the four sides of the cigarette package plastic film;

[0077] Step 4: The long-side film cutting device 2 and the short-side film cutting device 3 are retracted to their initial positions;

[0078] Step 5: The cutters 253 on the long-side film cutting device 2 and the short-side film cutting device 3 are retracted. At the same time, the long-side film cutting device 2 and the short-side film cutting device 3 are raised to the standby position, and all components return to their initial states.

[0079] The working mode of the present invention is:

[0080] When the film cutting device of the present invention is in operation, after the cigarette pack with plastic film is transported to the film cutting station via the conveyor belt, the four lifting cylinders 41 retract simultaneously and drive the long-side film cutting device 2 and the short-side film cutting device 3 to descend from the standby position to the working position;

[0081] After it is lowered into place, the four film pressing cylinders 223 simultaneously drive the film pressing plates 26 on the long-side film cutting device 2 and the short-side film cutting device 3 to extend. The swing assembly 23 and the two spring screw devices 27 cooperate to make the swing assembly 23 swing within a certain range as the cigarette pack tilts under the reaction force of the cigarette pack. The swing assembly 23 drives the film pressing plate 26 to swing and press the cigarette pack with plastic film.

[0082] After the film pressing plate 26 presses the plastic film, the four tool swing cylinders 252 simultaneously drive the four tools 253 to pop out. After the tools 253 pop out, the four tool holder sliding cylinders 24 drive the tools 253 on the four film cutting tool holders 25 to cut the four sides of the cigarette package plastic film at the same time.

[0083] After the cutting is completed, the two long-side film cutting devices 2 and the two short-side film cutting devices 3 simultaneously retreat to their initial positions, so that the film pressing plate 26 is separated from the cigarette pack with the plastic film;

[0084] The four tool swing cylinders 252 retract the tool 253, and the four tool holder sliding cylinders 24 drive the film cutting tool holder 25 to return to the initial position. At the same time, the four lifting cylinders 41 extend and drive the long side film cutting device 2 and the short side film cutting device 3 to rise to the standby position. All components return to the initial state, thus completing the film cutting process and entering the next working cycle.

[0085] It should be noted that the above detailed description of the technical solution of the present invention and the principles of the present invention are provided. The above description of the working principle is only intended to help understand the core concept of the present invention. It should be noted that those skilled in the art can improve and modify the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0086] Those skilled in the art may modify, supplement, or replace the described embodiments with similar methods, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims.

Claims

1. An embracing film cutting device, characterized in that: include: Frame, at least four sets of lifting devices, two sets of long-side film cutting devices, two sets of short-side film cutting devices and pneumatic system; The frame is a square frame structure; The two sets of long edge film cutting devices are respectively arranged on the left and right sides of the frame and installed on a lifting device, and are used to cut the long edges of the plastic film of the cigarette package; The two sets of short-edge film cutting devices are respectively arranged on the front and rear sides of the frame and installed on a lifting device, and are used to cut the short edges of the plastic film of the cigarette package; The at least four lifting devices are respectively arranged on the four longitudinal pillars of the frame; The pneumatic system is arranged on the front side of the frame and is used to provide air pressure power to the pneumatic components of the long-side film cutting device, the short-side film cutting device and the lifting device; The long-side film cutting device and the short-side film cutting device have similar structures, including a cantilever bracket, a film cutting telescopic assembly is provided on the cantilever bracket, a swing assembly is provided on the film cutting telescopic assembly, a knife holder sliding cylinder is provided on the swing assembly, a film cutting knife holder is provided on the slider of the knife holder sliding cylinder, and a film pressing plate is provided at the front end of the knife holder sliding cylinder; The film cutting telescopic assembly includes a telescopic guide rail arranged above the cantilever bracket, a sliding connecting plate is slidably arranged above the telescopic guide rail, the swing assembly is arranged on the sliding connecting plate, and a film pressing cylinder is arranged below the sliding connecting plate; A spring screw device is provided behind the tool holder sliding cylinder, a limit plate is provided on the sliding connection plate of the film cutting telescopic assembly, the limit plate is provided with a limit waist-shaped hole, and the screw end of the spring screw device passes through the limit waist-shaped hole; When the film cutting telescopic assembly is working, the swing assembly and the knife holder sliding cylinder, film cutting knife holder and film pressing plate above it swing with the tilted cigarette pack, and the swing angle range is the swing angle range of the spring screw device in the limiting waist hole of the limiting plate.

2. The wraparound film cutting device according to claim 1, characterized in that: The film cutting tool holder comprises a tool mounting plate arranged on a slide block of a tool holder sliding cylinder, a tool swing cylinder is arranged on the tool mounting plate, and a tool is arranged at an output end of the tool swing cylinder.

3. The wraparound film cutting device according to claim 1, characterized in that: The stroke of the knife holder sliding cylinder on the long side film cutting device is greater than the length of the cigarette pack, and the stroke of the knife holder sliding cylinder on the short side film cutting device is greater than the width of the cigarette pack; the length of the film pressing plate on the long side film cutting device is less than the length of the cigarette pack, and the length of the film pressing plate on the short side film cutting device is less than the width of the cigarette pack.

4. The wraparound film cutting device according to claim 1, characterized in that: The lifting device includes a lifting cylinder arranged at the lower part of the longitudinal support of the frame, a lifting support is arranged on the top of the lifting cylinder, the lifting support is slidably arranged on the lifting guide rail, and the lifting guide rail is arranged on the upper part of the longitudinal support of the frame; The lifting support is provided with a long side film cutting device mounting plate for mounting the long side film cutting device and a short side film cutting device mounting plate for mounting the short side film cutting device.

5. The embracing film cutting device according to any one of claims 1 to 4, characterized in that: The pneumatic system includes an air source processing component, a solenoid valve island, and a throttle valve. The air source processing component is connected to several solenoid valve islands, which are respectively connected to the pneumatic actuators on the long-side film cutting device, the short-side film cutting device, and the lifting device. A throttle valve is provided on the connecting pipeline between the solenoid valve island and each pneumatic actuator; The air source processing component is used to adjust the air source pressure and filter air impurities, the solenoid valve island is used to control the action of each pneumatic actuator, and the throttle valve is used to adjust the operating speed of each pneumatic actuator.

6. A cutting method for the encircling film cutting device according to claim 1, characterized in that: The following steps are involved: Step 1: After the cigarette pack with plastic film is conveyed by a conveyor belt or manually placed to the film cutting station, the long-side film cutting device and the short-side film cutting device are lowered from the standby position to the working position; Step 2: The long-side film cutting device and the short-side film cutting device extend and press the cigarette pack with the plastic film; Step 3: The cutters on the long-side film cutting device and the short-side film cutting device simultaneously cut the four sides of the plastic film of the cigarette package; Step 4: The long side film cutting device and the short side film cutting device are retracted to their initial positions; Step 5: The cutters on the long-side film cutting device and the short-side film cutting device are retracted. At the same time, the long-side film cutting device and the short-side film cutting device are raised to the standby position, and all components return to their initial state.

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