Film cutting mechanism of preservative film packaging machine
By designing a driving component with a linear drive source and a drive arm in a plastic wrapping machine, the downward and horizontal movement of the cutter is achieved, which solves the problems of low cutting efficiency and film hanging phenomenon in the prior art, and improves the efficiency of film cutting operation and the convenience of equipment maintenance.
Patent Information
- Application Number
- CN202422344905.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The film cutting mechanism of the existing plastic wrap packaging machine is inefficient and prone to film hanging when cutting plastic wrap, resulting in high maintenance costs.
A driving assembly including a linear drive source, a first drive arm, a transmission plate and a second drive arm is designed, and the rapid cutting of the plastic wrap is achieved by driving the cutter to move downward and horizontally.
It improves the efficiency of film cutting operations, avoids the phenomenon of hanging films, simplifies the maintenance process, extends the service life of the equipment and reduces costs.
Smart Images
Figure CN223015111U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packaging equipment, in particular to a film cutting mechanism of a fresh-keeping film packaging machine. Background Art
[0002] A fresh-keeping film packaging machine is a device used to draw fresh-keeping film from a film roll, wrap it around an object to be packaged, and cut the fresh-keeping film. Among them, the film cutting mechanism is a mechanism used to perform the action of cutting the fresh-keeping film. In the prior art, the film cutting mechanisms of fresh-keeping film packaging machines generally adopt two structures. One is to drive a cutting knife to horizontally move along the width direction of the fresh-keeping film to cut the fresh-keeping film. The problem with this structure is that the stroke of the cutting knife is relatively long when cutting the fresh-keeping film, resulting in low efficiency. The other is to drive the cutting knife to move longitudinally and cooperate with the high temperature generated by a heating wire arranged inside the knife body to cut the fresh-keeping film. The problem with this structure is that the phenomenon of film hanging is likely to occur, and the cutting knife needs to be cleaned and maintained regularly, resulting in high usage costs.
[0003] In view of the above problems, the utility model is improved. Summary of the Utility Model
[0004] The utility model provides a film cutting mechanism of a fresh-keeping film packaging machine, which solves the above problems existing in the prior art during use.
[0005] The technical solution of the utility model is realized as follows:
[0006] A film cutting mechanism of a fresh-keeping film packaging machine includes an installation main board, a film feeding roller, and a cutting knife. The film feeding roller is rotatably arranged on one side of the installation main board. It further includes a driving assembly, and the driving assembly includes a linear driving source, a first transmission arm, a transmission plate, and a second transmission arm. The linear driving source is fixedly arranged on the installation main board, and the driving direction of the linear driving source is along the horizontal direction. One end of the first transmission arm is hinged to the output shaft of the linear driving source, and the other end is hinged to the transmission plate horizontally arranged below the linear driving source. The second transmission arm is L-shaped, and the corner of the second transmission arm is rotatably connected to the installation main board above the transmission plate. At least two horizontally distributed second transmission arms are arranged on the installation main board. The vertical part of the second transmission arm is hinged to the transmission plate. The cutting knife is fixedly connected to the horizontal parts of several second transmission arms and is horizontally arranged, and several knife teeth are formed at the lower end of the cutting knife.
[0007] Preferably, the linear driving source is an electromagnetic cylinder.
[0008] Preferably, the cross-section of the transmission plate along the width direction is U-shaped, and both the first transmission arm and the second transmission arm are hinged between the two vertical parts of the transmission plate.
[0009] Preferably, the cutting knife is fixedly connected to the horizontal parts of several second transmission arms through a knife plate, the knife plate is fixedly connected to the horizontal parts of several second transmission arms, and the cutting knife is fixedly connected to the knife plate through bolts.
[0010] Preferably, the cutting teeth are triangular with the end angle facing downwards, and the side ends of the cutting teeth are sharpened.
[0011] Preferably, a partition plate horizontally arranged below the driving component is fixedly connected to the mounting main board.
[0012] Preferably, a tension spring rod located on one side of the end of the transmission plate is fixedly connected to the mounting main board, and a return tension spring with both ends respectively connected to the tension spring rod and the transmission plate is arranged between the tension spring rod and the end of the transmission plate.
[0013] In summary, the beneficial effects of the present utility model are as follows: When the driving component performs the film cutting operation, it drives the cutting knife to swing downwards, causing the cutting knife to move simultaneously in the downward and horizontal directions. The downward movement of the cutting knife makes the cutting teeth pierce the plastic wrap, and the horizontal movement of the cutting knife makes the cutting teeth cut the plastic wrap, completing the cutting operation of the plastic wrap. Therefore, the driving component can drive the cutting knife to quickly complete the film cutting operation, improving the efficiency of the film cutting operation, and avoiding the phenomenon of the plastic wrap hanging on the cutting knife, making the film cutting mechanism easy to maintain, that is, extending the service life and reducing the use cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0015] Figure 1 is a structural schematic diagram of the present utility model;
[0016] Figure 2 is an exploded schematic diagram of the present utility model;
[0017] Figure 3 is a structural schematic diagram of the driving component in the present utility model.
[0018] In the figure: 1, mounting main board; 2, film feeding roller; 3, cutting knife; 31, cutting teeth; 4. driving component; 41, electromagnetic cylinder; 42, first transmission arm; 43, transmission plate; 44, second transmission arm; 5, knife plate; 6, partition plate; 7, tension spring rod; 8, return tension spring; 9, induction switch. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following will be combined with the accompanying drawings in the embodiments of the present utility model Figures 1-3 to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.
[0020] As shown in the figure, a film cutting mechanism of a fresh-keeping film packaging machine includes an installation main board 1, a film feeding roller 2, a cutting knife 3 and a driving assembly 4. The film feeding roller 2 is rotatably arranged on one side of the installation main board 1. The driving assembly 4 includes a linear driving source, a first transmission arm 42, a transmission plate 43 and a second transmission arm 44. The linear driving source is fixedly arranged on the installation main board 1 and the driving direction of the linear driving source is along the horizontal direction. One end of the first transmission arm 42 is hinged to the output shaft of the linear driving source, and the other end is hinged to the transmission plate 43 horizontally arranged below the linear driving source. The second transmission arm 44 is L-shaped and the corner of the second transmission arm 44 is rotatably connected to the installation main board 1 above the transmission plate 43. At least two second transmission arms 44 horizontally distributed are arranged on the installation main board 1. The vertical part of the second transmission arm 44 is hinged to the transmission plate 43. The cutting knife 3 is fixedly connected to the horizontal parts of a plurality of second transmission arms 44 and is horizontally arranged, and a plurality of cutter teeth 31 are formed at the lower end of the cutting knife 3.
[0021] Specifically, the linear driving source is an electromagnetic cylinder 41.
[0022] Specifically, the cross-section of the transmission plate 43 in the width direction is U-shaped, and both the first transmission arm 42 and the second transmission arm 44 are hinged between the two vertical parts of the transmission plate 43.
[0023] Specifically, the cutting knife 3 is fixedly connected to the horizontal parts of a plurality of second transmission arms 44 through a knife plate 5. The knife plate 5 is fixedly connected to the horizontal parts of a plurality of second transmission arms 44, and the cutting knife 3 is fixedly connected to the knife plate 5 through bolts.
[0024] Specifically, the cutter teeth 31 are triangular with the end angle facing downwards, and the side ends of the cutter teeth 31 are sharpened.
[0025] In the above embodiment, this film cutting mechanism is fixedly installed on the frame of the fresh-keeping film packaging machine through the installation main board 1 for film cutting operation. The fresh-keeping film drawn from the film roll bypasses the film feeding roller 2 and then passes under the installation main board 1 and the cutting knife 3 for packaging the fresh-keeping film. When it is necessary to cut the fresh-keeping film, the output shaft of the electromagnetic valve extends to drive the first transmission arm 42 to move horizontally. The first transmission arm 42 drives the transmission plate 43 to move horizontally. The transmission plate 43 drives the horizontal part of the second transmission arm 44 to swing downward along the hinge axis of the second transmission arm 44 through the vertical part of the second transmission arm 44. The second transmission arm 44 drives the knife plate 5 and the cutting knife 3 to swing downward. During the downward swing of the cutting knife 3, there will be simultaneous downward and horizontal movements. The downward movement of the cutting knife 3 causes the cutter teeth 31 to pierce the fresh-keeping film, and the horizontal movement of the cutting knife 3 causes the cutter teeth 31 to cut the fresh-keeping film, completing the cutting operation of the fresh-keeping film. Then, the output shaft of the electromagnetic cylinder 41 resets and drives the upward swing and reset through the first transmission arm 42, the transmission plate 43 and the second transmission arm 44. It can be seen that when this film cutting mechanism performs the cutting operation of the fresh-keeping film, through the driving component 4, the cutting knife 3 can be driven to quickly complete the film cutting operation, improving the efficiency of the film cutting operation, and avoiding the phenomenon of the fresh-keeping film hanging on the cutting knife 3, making the film cutting mechanism easy to maintain, that is, extending the service life and reducing the use cost. During the above fresh-keeping film cutting operation, based on the characteristics of high precision and fast response speed of the electromagnetic cylinder 41, the stability and timeliness of the movement of the cutting knife 3 during the film cutting operation are ensured, so as to ensure that the cutting knife 3 can quickly and stably cut the fresh-keeping film. The transmission plate 43 with a U-shaped cross section strengthens its own strength while strengthening the firmness of the hinge with the first transmission arm 42 and the second transmission arm 44, thus ensuring that the cutting knife 3 can stably cut the fresh-keeping film. The form of the cutting knife 3 being fixedly connected to the knife plate 5 by bolts facilitates the disassembly and assembly of the cutting knife 3, and is convenient for the user to replace the cutting knife 3 when the cutting knife 3 is worn. The cutter teeth 31 in the shape of a triangle and with a sharpened side ensure that the cutting knife 3 can quickly and stably cut the fresh-keeping film.
[0026] Preferably, a partition plate 6 horizontally arranged below the driving component 4 is fixedly connected to the installation main board 1. The fresh-keeping film drawn from the film roll passes under the shelf. The shelf separates the fresh-keeping film from the driving component 4, avoiding mutual interference between the driving component 4 and the fresh-keeping film during operation, thus ensuring the stability during the film cutting operation.
[0027] Preferably, a pull spring rod 7 is fixedly connected to the installation main board 1 on one side of the end of the transmission plate 43. A reset pull spring 8 with both ends respectively connected to the pull spring rod 7 and the transmission plate 43 is arranged between the pull spring rod 7 and the end of the transmission plate 43. The reset pull spring 8 is stretched by the transmission plate 43 when the cutting knife 3 is driven by the driving component 4 to swing downward, so as to provide a restoring force for the cutting knife 3 through the restoration of the reset spring when the cutting knife 3 resets, ensuring that the cutting knife 3 can accurately reset for the next film cutting operation.
[0028] Preferably, an induction switch 9 electrically connected to the electromagnetic cylinder 41 is provided on the knife plate 5. The movement position of the cutting knife 3 is detected by the induction switch 9, and the induction switch 9 controls the action of the electromagnetic cylinder 41 to enable the cutting knife 3 to move more accurately, thereby making the film cutting operation more accurate.
[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A film cutting mechanism of a cling film packaging machine, comprising a mounting main board (1), a film feeding roller (2) and a cutter (3), wherein the film feeding roller (2) is rotatably arranged on one side of the mounting main board (1), and is characterized in that: The invention also comprises a driving assembly (4), the driving assembly (4) comprising a linear driving source, a first transmission arm (42), a transmission plate (43) and a second transmission arm (44); the linear driving source is fixedly arranged on the mounting main board (1) and the driving direction of the linear driving source is along the horizontal direction; one end of the first transmission arm (42) is hinged to the output shaft of the linear driving source and the other end is hinged to the transmission plate (43) arranged horizontally below the linear driving source; the second transmission arm (44) is L-shaped and the corner of the second transmission arm (44) is rotatably connected to the mounting main board (1) and located above the transmission plate (43); at least two horizontally distributed second transmission arms (44) are arranged on the mounting main board (1); the vertical portion of the second transmission arm (44) is hinged to the transmission plate (43); the cutter (3) is fixedly connected to the horizontal portions of a plurality of second transmission arms (44) and arranged horizontally; and a plurality of blade teeth (31) are formed at the lower end of the cutter (3).
2. The film cutting mechanism of the cling film packaging machine according to claim 1, characterized in that: The linear drive source is an electromagnetic cylinder (41).
3. The film cutting mechanism of the cling film packaging machine according to claim 2, characterized in that: The cross section of the transmission plate (43) along the width direction is U-shaped, and the first transmission arm (42) and the second transmission arm (44) are both hingedly located between two vertical portions of the transmission plate (43).
4. The film cutting mechanism of the cling film packaging machine according to claim 3, characterized in that: The cutter (3) is fixedly connected to the horizontal flat parts of a plurality of second transmission arms (44) via a cutter plate (5), the cutter plate (5) is fixedly connected to the horizontal flat parts of a plurality of second transmission arms (44), and the cutter (3) is fixedly connected to the cutter plate (5) via bolts.
5. The film cutting mechanism of the cling film packaging machine according to claim 4, characterized in that: The blade teeth (31) are in a triangular shape with the end angle facing downward, and the side ends of the blade teeth (31) are sharpened.
6. The film cutting mechanism of the cling film packaging machine according to claim 1, characterized in that: A partition plate (6) arranged horizontally below the drive assembly (4) is fixedly connected to the mounting main board.
7. The film cutting mechanism of the cling film packaging machine according to claim 1, characterized in that: A tension spring rod (7) located at one side of the end of the transmission plate (43) is fixedly connected to the mounting main board (1), and a reset tension spring (8) is provided between the tension spring rod (7) and the end of the transmission plate (43), with two ends respectively connected to the tension spring rod (7) and the transmission plate (43).