A positioning and trimming device for biodegradable plastic film production

Abstract

This utility model discloses a positioning and cutting device for biodegradable plastic film production, including a crossbar, a movable seat, and a blade holder. The movable seat is slidably mounted on both sides of the crossbar via grooves at its bottom, and the movable seat engages with the grooves via a bottom slider. Screws are symmetrically and rotatably mounted on both sides inside the grooves, passing through the threaded holes of the bottom sliders of the movable seats and threadedly connected to them, with the two screws meshing with each other. Shafts are fixed at both ends of the crossbar, and mounting seats are movably sleeved on the shafts. Gear disks are fixed to the outer walls at both ends of the crossbar, and the front end of the mounting seat is connected to an L-shaped bracket via a telescopic rod. A limiting tooth is fixed to the other end of the L-shaped bracket. This utility model achieves high-precision lateral adjustment of the blade position through the precise cooperation between the screw drive and the movable seat, and flexibly adjusts and stabilizes the cutting angle using the locking mechanism of the gear disk and the limiting tooth, thereby solving the problems of insufficient positioning accuracy, difficult angle adjustment, and low automation in traditional cutting devices.

Description

Technical Field

[0001] This utility model relates to the technical field of biodegradable plastic film production equipment, and in particular to a positioning and cutting device for biodegradable plastic film production. Background Technology

[0002] With increasingly stringent environmental protection requirements, biodegradable plastic film, as a substitute for traditional plastics, has seen its production process efficiency and stability become a key focus of the industry. The edge-cutting process, as a crucial link in plastic film production, directly affects product quality and production efficiency.

[0003] Currently, most plastic film trimming devices on the market use fixed blades or simple mechanical structures, which have the following problems:

[0004] Traditional devices typically require manual adjustment of the blade position, which makes it difficult to achieve high-precision lateral positioning, resulting in uneven or large deviations in the cut edges and affecting the dimensional consistency of the plastic film.

[0005] For plastic films that require cutting at special angles, traditional equipment often lacks a flexible angle adjustment mechanism, relying on complex auxiliary tooling, which is cumbersome and inefficient.

[0006] Therefore, how to provide a positioning and cutting device for the production of biodegradable plastic film is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] One objective of this invention is to provide a positioning and cutting device for the production of biodegradable plastic film. This invention can achieve high-precision lateral adjustment of the blade position through the precise cooperation between the lead screw drive and the movable seat, and flexibly adjust and stabilize the cutting angle by using the locking mechanism of the gear disk and the limiting teeth, thereby solving the problems of insufficient positioning accuracy, difficulty in angle adjustment and low degree of automation of traditional cutting devices.

[0008] A positioning and cutting device for producing biodegradable plastic film according to an embodiment of the present invention includes a crossbar, a movable seat, and a cutter holder;

[0009] The crossbar has movable seats slidably mounted on both sides through grooves opened at the bottom. The movable seats cooperate with the grooves through bottom sliders. Screws are symmetrically and rotatably mounted on both sides inside the grooves. The screws pass through the screw holes of the bottom sliders of the movable seats and are threadedly connected to them, and the two screws mesh with each other.

[0010] The crossbar has fixed shafts at both ends, and mounting seats are movably sleeved on the shafts; gear disks are fixed to the outer walls at both ends of the crossbar, and the front end of the mounting seat is connected to an L-shaped bracket via a telescopic rod. The other end of the L-shaped bracket is fixed with a limiting tooth, which is detachably inserted into the tooth groove of the gear disk.

[0011] The movable seat has a slot on its top, and the tool holder is inserted into the slot and secured with bolts.

[0012] Furthermore, a servo motor is fixed to the outside of the mounting base, and the output shaft of the servo motor passes through the mounting base and the shaft in sequence and is connected to the lead screw drive.

[0013] Furthermore, a clamping seat is provided on one side of the blade holder, and the blade is fixedly installed on the clamping seat by a fastening structure.

[0014] Furthermore, a screw hole is provided at the front end of the tool holder, and a bolt is inserted at the position corresponding to the screw hole at the front end of the movable seat, and the bolt is screwed and fixed to the screw hole.

[0015] Furthermore, the mounting base is provided with mounting holes on the rear side for fixed connection with an external frame.

[0016] Furthermore, a spring is fitted over the telescopic rod, with both ends of the spring fixedly connected to the mounting base and the L-shaped bracket, respectively, to provide elastic restoring force.

[0017] Furthermore, a handle is fixed in the center of the outer wall of the L-shaped bracket, which facilitates manual pulling of the L-shaped bracket to control the insertion and removal of the limiting teeth.

[0018] Furthermore, the limiting tooth and the tooth groove of the gear disk are detachably engaged through the telescopic action of the telescopic rod. When the telescopic rod retracts, the limiting tooth inserts into the tooth groove to lock the relative position of the crossbar and the mounting base. When the telescopic rod extends, the limiting tooth disengages from the tooth groove to allow the crossbar to rotate around the shaft.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model uses a servo motor to drive the lead screw to rotate, and utilizes the threaded transmission between the lead screw and the movable seat to achieve high-precision lateral movement of the movable seat along the crossbar. The design of the two lead screws meshing with each other ensures that the movable seats on both sides move synchronously in opposite directions, ensuring the symmetry of the cutting edge position. This allows for precise control so that the blade can be aligned with the edge of the plastic film, avoiding incomplete or over-cutting due to positional deviation, reducing waste, and improving the yield of plastic film.

[0021] 2. This utility model features a crossbar that can rotate around a shaft. Angle locking is achieved through the engagement of a telescopic rod, an L-shaped bracket, and a limiting tooth with a gear disc. The operator manually pulls the handle to control the extension and retraction of the telescopic rod, causing the limiting tooth to engage with the gear disc's tooth groove, thereby adjusting and fixing the angle of the crossbar. The adjustable crossbar angle design allows the device to adapt to the cutting requirements of plastic films with different curvatures or tilt angles, expanding its application scenarios. For example, when processing plastic films with special shapes, adjusting the crossbar angle allows the blade to cut precisely along a preset trajectory, improving the flexibility of the production line. At the same time, the locking structure between the gear disc and the limiting tooth ensures the stability of the crossbar during the cutting process, preventing angle deviation caused by vibration or external force and ensuring cutting consistency. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of a positioning and trimming device for biodegradable plastic film production proposed in this utility model;

[0024] Figure 2 This is a bottom view of the positioning and cutting device for biodegradable plastic film production proposed in this utility model;

[0025] Figure 3 This is a schematic diagram showing the disassembled structure of a positioning and cutting device for biodegradable plastic film production proposed in this utility model;

[0026] Figure 4 This is a partially enlarged structural diagram of a positioning and trimming device for biodegradable plastic film production proposed in this utility model.

[0027] In the diagram: 1. Crossbar; 2. Movable seat; 3. Tool holder; 4. Mounting seat; 5. Mounting hole; 6. Shaft; 7. Servo motor; 8. Slide groove; 9. Lead screw; 10. Slot; 11. Clamping seat; 12. Blade; 13. Bolt; 14. Screw hole; 15. Gear disk; 16. Telescopic rod; 17. L-shaped bracket; 18. Limiting tooth; 19. Spring; 20. Handle. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0029] refer to Figure 1-4 A positioning and cutting device for producing biodegradable plastic film includes a crossbar 1, a movable seat 2, and a cutter holder 3;

[0030] The bottom of both sides of the crossbar 1 is provided with a sliding groove 8. The movable seat 2 forms a sliding engagement with the sliding groove 8 through the bottom slider, so as to realize the lateral movement along the crossbar 1. Rotatable screw rods 9 are symmetrically installed on both sides inside the sliding groove 8. The screw rods 9 pass through the screw hole of the bottom slider of the movable seat 2 and are threadedly connected to it.

[0031] It is worth noting that the two lead screws 9 are designed to be opposite to each other, so as to ensure that the moving directions of the two movable seats 2 are opposite and the speed is consistent, thus ensuring the symmetry of the cutting operation.

[0032] In this design, the two ends of the crossbar 1 are movably fitted with mounting bases 4 via shafts 6. A servo motor 7 is fixed on the outside of the mounting base 4. The output shaft of the servo motor 7 passes through the mounting base 4 and shafts 6 in sequence and is connected to one end of the lead screw 9. When the servo motor 7 is started, its output shaft drives the lead screw 9 to rotate, which drives the movable seat 2 to move smoothly in the slide groove 8 through threaded transmission. This design achieves precise position control of the movable seat 2 and meets the edge cutting requirements of plastic films of different widths.

[0033] refer to Figure 1-4 Gear disks 15 are fixed to the outer walls of both ends of the crossbar 1. The front end of the mounting base 4 is connected to the L-shaped bracket 17 via the telescopic rod 16. The other end of the L-shaped bracket 17 is fixed with a limiting tooth 18. The limiting tooth 18 can be detachably engaged with the tooth groove of the gear disk 15 through the telescopic movement of the telescopic rod 16.

[0034] Specifically, when it is necessary to lock the relative position of the crossbar 1 and the mounting base 4, the telescopic rod 16 retracts, causing the limiting tooth 18 to insert into the tooth groove of the gear disk 15, thereby restricting the rotation of the crossbar 1 around the shaft 6.

[0035] When the angle of the crossbar 1 needs to be adjusted, the telescopic rod 16 is extended, causing the limiting tooth 18 to disengage from the tooth groove. At this time, the crossbar 1 can rotate freely around the shaft 6, which is convenient for adapting to different angle cutting operations.

[0036] The telescopic rod 16 is fitted with a spring 19, the two ends of which are fixedly connected to the mounting base 4 and the L-shaped bracket 17, respectively. The function of the spring 19 is to provide elastic restoring force for the telescopic rod 16, ensuring that the limiting tooth 18 always remains engaged with the gear disk 15 when no external force is applied, thereby enhancing the stability of the device. In addition, a handle 20 is fixed in the center of the outer wall of the L-shaped bracket 17. The operator can conveniently control the extension and retraction of the telescopic rod 16 by manually pulling the handle 20, thereby realizing the insertion and removal operation of the limiting tooth 18 and improving the human-machine interaction of the device.

[0037] refer to Figure 1-4The movable seat 2 has a slot 10 on its top, and the tool holder 3 can be directly inserted into the slot 10. To ensure the stability of the tool holder 3, a bolt 13 is inserted through the screw hole 14 at the front end of the movable seat 2 corresponding to the front end of the tool holder 3. By screwing the bolt 13 into the screw hole 14, the tool holder 3 can be quickly installed and disassembled. This design facilitates the replacement or maintenance of the tool holder 3 and improves production efficiency.

[0038] The blade holder 3 has a clamping seat 11 on one side. The clamping seat 11 is fixedly installed with the blade 12 by fastening structure (such as bolts, nuts, etc.). The operator can flexibly adapt to the diverse cutting needs by adjusting the fastening force of the clamping seat 11 or replacing the blade 12 with different specifications according to the thickness and material of the plastic film. In addition, the detachable connection design between the blade 12 and the blade holder 3 further reduces the maintenance cost.

[0039] In addition, mounting holes 5 are provided on the rear side of the mounting base 4 for fixing the entire device to the external frame. On the biodegradable plastic film production line, the device can be stably integrated into the frame through the mounting holes 5 and used in conjunction with the production line's transmission system to achieve automated edge cutting. When the plastic film is conveyed to the edge cutting position by the transmission mechanism, the servo motor 7 drives the movable seat 2 to move, which drives the blade 12 to precisely cut the edge of the plastic film. At the same time, by adjusting the angle of the crossbar 1 and the position of the movable seat 2, the edge cutting requirements of plastic films of different shapes and sizes can be met, making it widely applicable.

[0040] Working principle: First, the entire device is securely connected to the external frame through the mounting hole 5 on the rear side of the mounting base 4 to ensure its stability on the production line. The mounting base 4 is movably connected to the crossbar 1 via the shaft 6, laying the foundation for subsequent angle adjustment of the crossbar 1. Then, according to the material and thickness of the plastic film to be cut, a suitable blade 12 is selected and fixed to one side of the blade holder 3 through the fastening structure of the clamping base 11. Subsequently, the bottom of the blade holder 3 is inserted into the slot 10 on the top of the movable base 2, and the bolt 13 at the front end of the movable base 2 is tightened into the screw hole 14 at the front end of the blade holder 3 to complete the cutting process. For quick installation and positioning, when the cutting edge position needs adjustment, the servo motor 7 on the outside of the mounting base 4 is activated. The output shaft of the servo motor 7 drives the lead screw 9 to rotate. Since the two lead screws 9 are meshed with each other, they will rotate synchronously in opposite directions. The lead screw 9 is threadedly connected to the screw hole of the bottom slider of the movable seat 2. Therefore, the rotation of the lead screw 9 is converted into the lateral movement of the movable seat 2 along the slide groove 8. By controlling the rotation direction and speed of the servo motor 7, the distance between the two movable seats 2 can be precisely adjusted to adapt to the cutting edge requirements of plastic films of different widths. If the cutting edge angle needs to be adjusted, the operator can manually pull the handle on the L-shaped bracket 17. Handle 20 extends the telescopic rod 16, at which point the limiting tooth 18 disengages from the gear slot of the gear disk 15, and the crossbar 1 loses its limiting constraint, allowing it to rotate freely around the shaft 6. Once the crossbar 1 has rotated to the desired angle, handle 20 is released. The spring 19, which is sleeved on the telescopic rod 16, pushes the L-shaped bracket 17 back to its original position due to its elastic restoring force, causing the limiting tooth 18 to re-insert into the corresponding slot of the gear disk 15, thus locking the angle of the crossbar 1. This design ensures precise adjustment and stable support of the cutting angle. The biodegradable plastic film is conveyed to the underside of the cutting device via the production line's transmission mechanism. At this point, the movable seat 2 has already adjusted according to the plastic... The width of the film is adjusted to the appropriate position, and the angle of the crossbar 1 is locked according to the cutting requirements, ensuring that the position and angle of the blade 12 are accurately aligned with the edge of the plastic film. When the plastic film moves to the preset cutting position, the servo motor 7 drives the lead screw 9 to rotate again, driving the movable seat 2 to move towards the edge of the plastic film. The blade holder 3 and the blade 12 mounted on the movable seat 2 move synchronously. The sharp edge of the blade 12 is used to cut the edge of the plastic film. Due to the precise transmission of the lead screw 9 and the stable sliding of the movable seat 2, the cutting process is smooth and highly accurate, effectively avoiding the tearing or burr problem of the plastic film.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A biodegradable plastic film production positioning and trimming device, characterized by, It includes a crossbar (1), a movable seat (2), and a knife holder (3); The crossbar (1) has movable seats (2) slidably installed on both sides through the bottom grooves (8). The movable seats (2) cooperate with the grooves (8) through the bottom slider. The grooves (8) have symmetrically rotatably installed lead screws (9) on both sides inside. The lead screws (9) pass through the screw holes of the bottom slider of the movable seat (2) and are threadedly connected to it. The two lead screws (9) mesh with each other. The crossbar (1) has fixed shafts (6) at both ends, and mounting seats (4) are movably sleeved on the shafts (6); gear disks (15) are fixed on the outer walls of both ends of the crossbar (1); the front end of the mounting seat (4) is connected to an L-shaped bracket (17) through a telescopic rod (16); the other end of the L-shaped bracket (17) is fixed with a limiting tooth (18); the limiting tooth (18) is detachably inserted into the tooth groove of the gear disk (15); The movable seat (2) has a slot (10) on its top, and the knife holder (3) is inserted into the slot (10) and fixed by bolts (13).

2. The positioning and trimming device for biodegradable plastic film production according to claim 1, characterized in that, The servo motor (7) is fixed on the outside of the mounting base (4). The output shaft of the servo motor (7) passes through the mounting base (4) and the shaft (6) in sequence and is connected to the lead screw (9) for transmission.

3. The positioning and trimming device for biodegradable plastic film production according to claim 1, characterized in that, A clamping seat (11) is provided on one side of the blade holder (3), and the blade (12) is fixedly installed on the clamping seat (11) by a fastening structure.

4. The positioning and trimming device for biodegradable plastic film production according to claim 1, characterized in that, The tool holder (3) has a screw hole (14) at its front end. The movable seat (2) has a bolt (13) inserted at the position corresponding to the screw hole (14) at its front end. The bolt (13) is screwed and fixed to the screw hole (14).

5. The positioning and trimming device for biodegradable plastic film production according to claim 1, characterized in that, The mounting base (4) has a mounting hole (5) on its rear side for fixed connection with an external frame.

6. The positioning and trimming device for biodegradable plastic film production according to claim 1, characterized in that, The telescopic rod (16) is fitted with a spring (19), and the two ends of the spring (19) are fixedly connected to the mounting base (4) and the L-shaped bracket (17) respectively, to provide elastic restoring force.

7. The positioning and trimming device for biodegradable plastic film production according to claim 1, characterized in that, The L-shaped bracket (17) has a handle (20) fixed in the center of its outer wall, which makes it easy to manually pull the L-shaped bracket (17) to control the insertion and removal of the limiting teeth (18).

8. The positioning and trimming device for biodegradable plastic film production according to claim 1, characterized in that, The limiting tooth (18) and the tooth groove of the gear disk (15) are detachably snapped together by the telescopic action of the telescopic rod (16). When the telescopic rod (16) retracts, the limiting tooth (18) inserts into the tooth groove to lock the relative position of the crossbar (1) and the mounting base (4). When the telescopic rod (16) is extended, the limiting tooth (18) disengages from the tooth groove to allow the crossbar (1) to rotate around the shaft (6).

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