A protective film rapid slitting device

Abstract

The utility model discloses a kind of protective film quick slitting device, belong to protective film slitting technical field, including base and operation platform, operation platform bottom and base top fixed connection, still include multiple tool bits, pressing plate, driving assembly and winding assembly, multiple tool bits are horizontally spaced distribution in operation platform top, tool bit is rotatably installed in operation platform by driving assembly, this protective film quick slitting device, by the mode of turning tool bit and cooperating pressing plate extruding protective film, the puncture portion of tool bit first penetrates protective film, and under the extrusion of pressing plate, prevent protective film from deformation, after tool bit rotates to vertical state, along with the movement of protective film, the separation portion of tool bit is cut, by the L shape structure of tool bit, continue to provide horizontal division force to protective film, solve the existing protective film slitting device mostly inconvenient to continue to provide stable division force, and easily make protective film deformation lead to slitting quality low condition.

Description

Technical Field

[0001] This utility model relates to the field of protective film cutting technology, specifically to a protective film rapid cutting device. Background Technology

[0002] Protective film is a film used to protect the surface of physical objects, preventing scratches, wear, contamination, corrosion, and other damage during transportation, storage, and use. It is widely used in various fields, such as digital product protective films for protecting the screens of mobile phones, tablets, and laptops; automotive protective films for protecting car paint; household protective films for protecting furniture, door and window glass; and food preservation protective films for preserving and isolating food.

[0003] The protective film rapid slitting device is a specialized piece of equipment used to slit rolls of protective film (such as PE, PET, PVC, etc.) into multiple rolls or multiple sheets of smaller protective film according to a set width, length, or shape. It can meet the size requirements of protective films for different application scenarios (such as mobile phone screens, automotive window tinting, industrial packaging, etc.), improve protective film production efficiency, and achieve batch slitting and customized processing.

[0004] For example, comparing a protective film slitting device with Chinese Patent Publication No. CN222987032U, which relates to the field of protective film slitting technology, includes a worktable with a support frame fixed to the top. Two hydraulic rods are fixed to the top of the support frame, and a moving component is fixed between the two hydraulic rods. Multiple slitting blades are connected to components of the moving component. Feed rolls and take-up rolls are respectively installed at the front and rear ends of the worktable. The moving component includes a fixed plate fixed between the two lifting rods, and a moving plate slides in a slide rail inside the fixed plate. While this solution allows for quick adjustment of the distance between the cutters, like most existing protective film slitting devices, it requires continuous pressure on the blades to cut the protective film, making it difficult to maintain a continuous slitting force. Because different protective films have varying thicknesses and toughness, the blades need to continuously apply significant pressure. However, protective films are mostly flexible materials, and high pressure can easily cause deformation, further leading to deviations in the cutting position, inaccurate slitting dimensions, and even damage to the entire roll of material, resulting in property loss. Utility Model Content

[0005] The purpose of this invention is to provide a protective film rapid cutting device that can adapt to protective films of different specifications and achieve stable and accurate cutting.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A rapid protective film slitting device is provided, including a base and an operating table. The bottom of the operating table is fixedly connected to the top of the base. The device also includes multiple cutters, a pressure plate, a drive assembly, and a winding assembly. The multiple cutters are horizontally spaced on the top of the operating table. The cutters are rotatably mounted inside the operating table via the drive assembly. The pressure plate is vertically slidably mounted on the operating table via the drive assembly. The bottom of the pressure plate abuts against the top of the operating table. Multiple through holes are provided on both the bottom of the pressure plate and the top of the operating table for the cutters to rotate. Each cutter includes a piercing part and a cutting part. The piercing part and the cutting part are fixedly connected and form an L-shaped structure. The winding assembly is mounted on the base and is used to drive the protective film to move horizontally.

[0008] Furthermore, the drive assembly includes a rotating shaft, a first motor, a gear, and a rack. The rotating shaft is rotatably connected to the inner wall of the operating table, passes through the bottom of the cutter head, and is fixedly connected thereto. The first motor is fixedly connected to one side of the operating table, and the output shaft of the first motor passes through the side wall of the operating table and is coaxially connected to the rotating shaft. A pair of support plates are fixedly connected to the bottom of the pressure plate, and the support plates pass through the top wall of the operating table and are slidably connected thereto. The rack is rotatably mounted on one of the support plates, and the gear is coaxially connected to the periphery of the rotating shaft. The gear and the rack mesh with each other.

[0009] Furthermore, the drive assembly also includes a pair of torsion springs. One end of the rack is fixedly connected to a cam shaft, which passes through the inner wall of the support plate and is rotatably connected to it. The torsion springs are sleeved around the cam shaft, with one end of the torsion springs fixedly connected to the rack and the other end of the torsion springs fixedly connected to the cam shaft. One end of the support plate is provided with a pair of inclined slots, which are used to consume the rotational stroke of the rack.

[0010] Furthermore, the winding assembly includes a pair of rotating seats, a pair of support rods, and a second motor. The two rotating seats are located at both ends of the operating table and are fixedly connected to the top of the base. The support rods pass through the rotating seats and are rotatably connected to them. The two support rods are respectively fitted with unwinding drums and multiple winding drums and are coaxially connected to them. The second motor is fixedly connected to the rotating seats. The output shaft of the second motor passes through the rotating seats and is coaxially connected to the support rods fitted with winding drums.

[0011] Furthermore, the winding assembly also includes a ratchet, a ring, multiple pawls, and multiple springs. The ring is fixedly connected to the rotating seat. Multiple grooves are provided on the inner wall of the ring, and the grooves are arranged circumferentially inside the ring. One end of the pawl is rotatably connected to the inner wall of the ring, and the other end of the pawl abuts against the protrusion on the periphery of the ratchet. One end of the spring is fixedly connected to the inner wall of the groove, and the other end of the spring is fixedly connected to the pawl. The ratchet is coaxially connected to the support rod on which the unwinding drum is sleeved.

[0012] Furthermore, the winding assembly also includes a limiting roller, which is rotatably connected to the inner wall of the operating table. The top of the limiting roller is flush with the top of the operating table. The pressure plate includes a main plate and a secondary plate. The two sides of the main plate are fixedly connected to the top of two support plates respectively. One end of the secondary plate is hinged to the end of the main plate near the winding drum. The bottom of the opposite ends of the main plate and the secondary plate are both arc-shaped structures.

[0013] The beneficial effects of this utility model are as follows: By using a cutting head, pressure plate, and drive assembly, this utility model, when slitting the protective film, moves the protective film horizontally on the operating table via a winding assembly, while the drive assembly drives the pressure plate to press the protective film downwards. Subsequently, multiple cutting heads flip to the top of the operating table. During this process, the piercing part of the cutting head penetrates the protective film first, and under the pressure of the pressure plate, the protective film deforms. After the cutting head rotates to a vertical position, as the protective film moves, the dividing part of the cutting head cuts it. Through the L-shaped structure of the cutting head, a continuous horizontal dividing force is provided to the protective film, thus improving the slitting quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0017] Figure 3 This is an exploded view of the winding assembly structure of this utility model;

[0018] Figure 4 This is a cross-sectional view of the operating table structure of this utility model;

[0019] Figure 5 This is an exploded view of the drive component structure of this utility model;

[0020] Figure 6 This is a cross-sectional view of the annular structure of this utility model.

[0021] In the picture:

[0022] 1. Base; 10. Operating table; 100. Through hole; 11. Cutting head; 110. Puncture section; 111. Dividing section; 12. Pressure plate; 120. Main plate; 121. Sub-plate; 13. Support plate; 130. Inclined groove; 14. Unwinding drum; 15. Rewinding drum;

[0023] 2. Drive assembly; 20. Shaft; 21. First motor; 22. Gear; 23. Rack; 24. Torsion spring; 25. Cam shaft;

[0024] 3. Rewinding assembly; 30. Rotating seat; 31. Support rod; 32. Second motor; 33. Ratchet; 34. Ring; 340. Groove; 35. Pawl; 36. Spring; 37. Limiting roller. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] Reference Figures 1 to 6 The protective film rapid slitting device shown includes a base 1 and an operating table 10. The bottom of the operating table 10 is fixedly connected to the top of the base 1. It also includes multiple cutters 11, a pressure plate 12, a drive assembly 2, and a winding assembly 3. The multiple cutters 11 are horizontally spaced on the top of the operating table 10. The cutters 11 are rotatably mounted in the operating table 10 via the drive assembly 2. The pressure plate 12 is vertically slidably mounted on the operating table 10 via the drive assembly 2. The bottom of the pressure plate 12 abuts against the top of the operating table 10. Multiple through holes 100 are provided on both the bottom of the pressure plate 12 and the top of the operating table 10. The through holes 100 are used for the cutters 11 to rotate. The cutter 11 includes a piercing part 110 and a dividing part 111. The piercing part 110 and the dividing part 111 are fixedly connected and form an L-shaped structure. The winding assembly 3 is mounted on the base 1 and is used to drive the protective film to move horizontally.

[0028] When slitting the protective film, the winding assembly 3 drives the protective film to move horizontally on the operating table 10. At the same time, the driving assembly 2 drives the pressure plate 12 to press the protective film downward to keep it flat, and aligns the through hole 100 on the pressure plate 12 with the through hole 100 on the operating table 10 for the subsequent cutting head 11 to pass through. Then, multiple cutting heads 11 are flipped to the top of the operating table 10. During this process, the piercing part 110 of the cutting head 11 first penetrates the protective film, and the protective film deforms under the pressure of the pressure plate 12. Then the cutting head 11 rotates to a vertical position. As the protective film moves, the dividing part of the cutting head 11 cuts it. Through the L-shaped structure of the cutting head 11, a horizontal dividing force is continuously provided to the protective film, which can improve the slitting quality.

[0029] like Figures 1 to 5 As shown, the drive assembly 2 includes a rotating shaft 20, a first motor 21, a gear 22, and a rack 23. The rotating shaft 20 is rotatably connected to the inner wall of the operating table 10. The rotating shaft 20 passes through the bottom of the cutter head 11 and is fixedly connected to it. The first motor 21 is fixedly connected to one side of the operating table 10. The output shaft of the first motor 21 passes through the side wall of the operating table 10 and is coaxially connected to the rotating shaft 20. A pair of support plates 13 are fixedly connected to the bottom of the pressure plate 12. The support plates 13 pass through the top wall of the operating table 10 and are slidably connected to it. The rack 23 is rotatably mounted on one of the support plates 13. The gear 22 is coaxially connected to the periphery of the rotating shaft 20. The gear 22 and the rack 23 mesh with each other.

[0030] The drive assembly 2 also includes a pair of torsion springs 24. One end of the rack 23 is fixedly connected to a convex shaft 25, which passes through the inner wall of the support plate 13 and is rotatably connected to it. The torsion springs 24 are sleeved around the convex shaft 25. One end of the torsion springs 24 is fixedly connected to the rack 23, and the other end of the torsion springs 24 is fixedly connected to the convex shaft 25. One end of the support plate 13 is provided with a pair of inclined grooves 130, which are used to consume the rotational stroke of the rack 23.

[0031] The first motor 21 is powered on, and its output shaft drives the rotating shaft 20 to rotate. Simultaneously, it drives the gear 22 to rotate and the multiple cutters 11 to rotate upwards. When the cutter 11 rotates to a horizontal position, the meshing transmission between the gear 22 and the rack 23 causes the support plate 13 to slide down and pull the pressure plate 12 down to the top of the protective film, thus squeezing the protective film. The rotating shaft 20 then continues to rotate, causing the cutter 11 to rotate to a vertical position and pass through the through hole 100 to cut the protective film. At this time, the gear 22 squeezes the rack 23, causing it to tilt. The cam 25 rotates within the support plate 13, and the torsion spring 24 is twisted, preventing the rack 23 from locking up and allowing the cutter 11 to continue rotating. After the cutting is completed, the rotating shaft 20 rotates in the opposite direction, causing the cutter 11 and the pressure plate 12 to reset sequentially. The torsion spring 24 rebounds, causing the rack 23 to return to a vertical position.

[0032] like Figures 1 to 6As shown, the winding assembly 3 includes a pair of rotating seats 30, a pair of support rods 31, and a second motor 32. The two rotating seats 30 are located at both ends of the operating table 10 and are fixedly connected to the top of the base 1. The support rods 31 pass through the rotating seats 30 and are rotatably connected to them. The two support rods 31 are respectively fitted with unwinding drums 14 and multiple winding drums 15 and are coaxially connected to them. The second motor 32 is fixedly connected to the rotating seats 30. The output shaft of the second motor 32 passes through the rotating seats 30 and is coaxially connected to the support rods 31 fitted with winding drums 15.

[0033] The winding assembly 3 also includes a ratchet 33, a ring 34, multiple pawls 35, and multiple springs 36. The ring 34 is fixedly connected to the rotating seat 30. Multiple grooves 340 are provided on the inner wall of the ring 34, and the multiple grooves 340 are arranged in a circle inside the ring 34. One end of the pawl 35 is rotatably connected to the inner wall of the ring 34, and the other end of the pawl 35 abuts against the protrusion on the periphery of the ratchet 33. One end of the spring 36 is fixedly connected to the inner wall of the groove 340, and the other end of the spring 36 is fixedly connected to the pawl 35. The ratchet 33 is coaxially connected to the support rod 31 on which the unwinding drum 14 is sleeved.

[0034] The unwinding drum 14, with a protective film wound around it, and multiple take-up drums 15 are inserted into the periphery of the support rod 31. The protrusions on the periphery of the support rod 31 abut against the grooves on the inner walls of the unwinding drum 14 and take-up drum 15, allowing them to rotate coaxially. One end of the protective film is then pulled along the top of the operating table 10 to the periphery of the take-up drum 15 and fixed, allowing it to pass through the bottom of the pressure plate 12. The second motor 32 is then energized, and its output shaft drives the take-up drum 15 to rotate, enabling the protective film to move horizontally and be cut by the cutter head 11 during this movement. Simultaneously, during this movement, the pawl 35 follows the unwinding drum 14, rotating within the ring 34. Pressing the pawl 35 causes it to rotate within the groove 340, compressing the spring 36. The spring 36 then rebounds, pushing the pawl 35 back to its original position. This cycle provides resistance to the ratchet 33, keeping the protective film taut and maintaining its surface tension, further preserving its flatness and improving the slitting quality.

[0035] like Figure 5 As shown, the winding assembly 3 also includes a limiting roller 37, which is rotatably connected to the inner wall of the operating table 10. The top of the limiting roller 37 is flush with the top of the operating table 10. The pressure plate 12 includes a main plate 120 and a secondary plate 121. The two sides of the main plate 120 are fixedly connected to the tops of two support plates 13 respectively. One end of the secondary plate 121 is hinged to the end of the main plate 120 near the winding drum 15. The bottom of the opposite ends of the main plate 120 and the secondary plate 121 are both arc-shaped structures.

[0036] During the horizontal movement of the protective film, its bottom rubs against the limiting roller 37, causing the limiting roller 37 to rotate. This reduces the friction between the protective film and the operating table 10 while maintaining the surface tension of the protective film. As more and more protective film is wound around the outer edge of the take-up drum 15, its thickness gradually increases, causing the protective film to tilt upwards after passing the main board 120. At this time, the secondary board 121 is lifted and tilted, and the transition between the main board 120 and the secondary board 121 is smooth, further preventing the protective film from being damaged by friction.

[0037] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A rapid cutting device for protective film, comprising a base (1) and an operating table (10), wherein the bottom of the operating table (10) is fixedly connected to the top of the base (1), characterized in that, It also includes multiple blades (11), pressure plate (12), drive assembly (2) and winding assembly (3). Multiple blades (11) are horizontally spaced on the top of the operating table (10). The blades (11) are rotatably mounted in the operating table (10) through the drive assembly (2). The pressure plate (12) is vertically slidably mounted on the operating table (10) through the drive assembly (2). The bottom of the pressure plate (12) abuts against the top of the operating table (10). Multiple through holes (100) are provided on the bottom of the pressure plate (12) and the top of the operating table (10). The through holes (100) are used for the blades (11) to flip. The blades (11) include a piercing part (110) and a dividing part (111). The piercing part (110) and the dividing part (111) are fixedly connected and form an L-shaped structure. The winding assembly (3) is mounted on the base (1). The winding assembly (3) is used to drive the protective film to move horizontally.

2. The protective film rapid slitting device according to claim 1, characterized in that, The drive assembly (2) includes a rotating shaft (20), a first motor (21), a gear (22), and a rack (23). The rotating shaft (20) is rotatably connected to the inner wall of the operating table (10). The rotating shaft (20) passes through the bottom of the cutter head (11) and is fixedly connected to it. The first motor (21) is fixedly connected to one side of the operating table (10). The output shaft of the first motor (21) passes through the side wall of the operating table (10) and is coaxially connected to the rotating shaft (20). A pair of support plates (13) are fixedly connected to the bottom of the pressure plate (12). The support plates (13) pass through the top wall of the operating table (10) and are slidably connected to it. The rack (23) is rotatably mounted on one of the support plates (13). The gear (22) is coaxially connected to the outer periphery of the rotating shaft (20). The gear (22) and the rack (23) mesh with each other.

3. The protective film rapid slitting device according to claim 2, characterized in that, The drive assembly (2) also includes a pair of torsion springs (24). One end of the rack (23) is fixedly connected to a convex shaft (25). The convex shaft (25) passes through the inner wall of the support plate (13) and is rotatably connected to it. The torsion spring (24) is sleeved around the convex shaft (25). One end of the torsion spring (24) is fixedly connected to the rack (23), and the other end of the torsion spring (24) is fixedly connected to the convex shaft (25). One end of the support plate (13) is provided with a pair of inclined grooves (130). The inclined grooves (130) are used to consume the rotation stroke of the rack (23).

4. The protective film rapid slitting device according to claim 1, characterized in that, The winding assembly (3) includes a pair of rotating seats (30), a pair of support rods (31), and a second motor (32). The two rotating seats (30) are located at both ends of the operating table (10) and are fixedly connected to the top of the base (1). The support rods (31) pass through the rotating seats (30) and are rotatably connected to them. The two support rods (31) are respectively fitted with unwinding drums (14) and multiple winding drums (15) and are coaxially connected to them. The second motor (32) is fixedly connected to the rotating seats (30). The output shaft of the second motor (32) passes through the rotating seats (30) and is coaxially connected to the support rods (31) fitted with winding drums (15).

5. The protective film rapid slitting device according to claim 4, characterized in that, The winding assembly (3) also includes a ratchet (33), a ring (34), multiple pawls (35) and multiple springs (36). The ring (34) is fixedly connected to the rotating seat (30). Multiple grooves (340) are provided on the inner wall of the ring (34). The multiple grooves (340) are arranged in a circle inside the ring (34). One end of the pawl (35) is rotatably connected to the inner wall of the ring (34), and the other end of the pawl (35) abuts against the protrusion on the periphery of the ratchet (33). One end of the spring (36) is fixedly connected to the inner wall of the groove (340), and the other end of the spring (36) is fixedly connected to the pawl (35). The ratchet (33) is coaxially connected to the support rod (31) on which the unwinding drum (14) is sleeved.

6. The protective film rapid slitting device according to claim 4, characterized in that, The winding assembly (3) also includes a limiting roller (37), which is rotatably connected to the inner wall of the operating table (10). The top of the limiting roller (37) is flush with the top of the operating table (10). The pressure plate (12) includes a main plate (120) and a secondary plate (121). The two sides of the main plate (120) are fixedly connected to the top of two support plates (13) respectively. One end of the secondary plate (121) is hinged to the end of the main plate (120) near the winding drum (15). The bottom of the opposite ends of the main plate (120) and the secondary plate (121) are both arc-shaped structures.

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