Cutting device for polyester film processing

Abstract

The utility model relates to the technical field of polyester film processing, in particular to a cutting device for polyester film processing, when cutting operation is started, a cutter moves downwards, and pressing blocks symmetrically arranged on the two sides of the cutting direction of the cutter synchronously descend along with the cutter. Before the cutter is in contact with the polyester film, the pressing block is in contact with the film firstly and clamps the film in a relatively small and accurate range. Due to the fact that the clamping range is concentrated on the two sides close to the cutting line, pressure can act on key parts more effectively, and the thin film is firmly fixed. And then the clamped thin film is cut by a cutter, and it is ensured that the thin film cannot be displaced and deformed due to stress in the cutting process. Through the arrangement, deformation and wrinkles of the thin film in the cutting process can be remarkably reduced, the displacement and deformation possibility of the thin film is greatly reduced, and therefore the wrinkles are remarkably reduced, and the product quality is greatly improved. The method can be widely applied to the technical field of polyester film processing.

Description

Technical Field

[0001] This utility model relates to the field of polyester film processing technology, and more specifically, to a cutting device for polyester film processing. Background Technology

[0002] After polyester film is produced, it needs to be cut to meet usage requirements. Polyester film itself has a certain degree of flexibility and extensibility. During the cutting process, a common method of fixing the film is simply to secure both ends. However, this method is not effective in preventing deformation and wrinkles during cutting. Because only the ends are fixed, the middle portion of the film, when subjected to cutting forces, lacks sufficient constraint and support, making it prone to displacement and deformation. This displacement and deformation leads to uneven stress distribution within the film, resulting in wrinkles. These wrinkles not only affect the product's appearance but may also damage the film's internal structure, reducing its physical and chemical properties, thus adversely impacting its subsequent performance. Utility Model Content

[0003] In view of the problem that existing cutting devices only fix the two ends of the polyester film when cutting, and the middle part of the film is easily subjected to cutting force during cutting, resulting in wrinkles and deformation; this utility model proposes a cutting device for polyester film processing.

[0004] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0005] A cutting device for processing polyester film includes a worktable and a cutting scissors. The cutting scissors are arranged above the worktable and can move up and down. Pressure blocks are symmetrically arranged on both sides of the cutting direction of the cutting scissors. The pressure blocks can move up and down synchronously with the cutting scissors. When the cutting scissors cut the polyester film on the worktable, the pressure blocks press the polyester film tightly.

[0006] When the cutting operation is initiated, the cutter moves downwards, and the pressure blocks symmetrically positioned on both sides of the cutter's cutting direction descend synchronously with it. Before the cutter contacts the polyester film, the pressure blocks first contact the film and clamp it within a relatively small and precise area. Because the clamping range is concentrated on both sides near the cutting line, the pressure can be applied more effectively to critical areas, firmly securing the film. The cutter then cuts the clamped film, ensuring that the film does not shift or deform due to stress during the cutting process. This setup significantly reduces film deformation and wrinkles during the cutting process, greatly minimizing the possibility of film displacement and deformation, thereby significantly reducing wrinkle formation and greatly improving product quality.

[0007] Preferably, the device also includes a vertically movable mounting plate, with the cutting shears fixed to the lower end face of the mounting plate, a spring fixed to the lower end face of the mounting plate, and the pressure block fixed to the lower end face of the spring.

[0008] During the cutting process, the mounting plate moves downwards under the action of the drive device. Since the cutting blades are fixed to the lower end face of the mounting plate, they descend along with the plate. Simultaneously, a spring fixed to the lower end face of the mounting plate connects to a pressure block. As the mounting plate descends, the spring is compressed first, causing the pressure block to contact and press the polyester film with a certain elastic pressure. As the mounting plate continues to descend, the cutting blades begin to cut the film. This setup ensures that the pressure block presses the polyester film firmly before the cutting blades cut it, and the elastic pressing method, compared to rigid pressing, reduces excessive compression and potential damage to the film, helping to maintain the film's original properties and quality.

[0009] Preferably, the upper end face of the pressure block is fixed with a limiting rod, and there are two limiting rods symmetrically arranged on both sides of the spring. The mounting plate is provided with a limiting hole for the limiting rod to pass through, and the limiting rod can move up and down within the limiting hole.

[0010] When the mounting plate moves the spring and pressure block up and down, the limiting rods, which are fixed to the upper surface of the pressure block and symmetrically arranged on both sides of the spring, move up and down within the limiting holes opened on the mounting plate. The cooperation between the limiting rods and the limiting holes provides precise guidance for the up and down movement of the pressure block, ensuring that the pressure block always moves in the vertical direction without deviation or tilting, thereby ensuring that the pressure block can accurately press the polyester film to the corresponding position.

[0011] Preferably, the end of the limiting rod extending out of the mounting plate is fixed with a limiting plate.

[0012] This effectively limits the maximum downward travel of the limit rod, preventing it from accidentally falling out of the limit hole and ensuring the stability and reliability of the entire structure.

[0013] Preferably, a rubber layer is fixed on the bottom wall of the pressure block, and when the spring is in its natural downward state, the height of the bottom wall of the rubber layer is lower than the height of the cutting shears.

[0014] Under normal operating conditions, the spring naturally droops, causing the rubber layer fixed to the bottom wall of the pressure block to be positioned below the height of the cutting blades. During the cutting operation, the pressure block descends with the mounting plate, and the rubber layer first contacts and presses the polyester film firmly before the cutting blades cut the film. The rubber layer has significant friction, which allows it to firmly press the polyester film and prevent slippage. Simultaneously, the elasticity of the rubber also provides a certain degree of cushioning, reducing impact on the film.

[0015] Preferably, the device also includes a mounting base fixed to the workbench, wherein a hydraulic push rod and a drive motor are fixed to the lower end face of the mounting base, and the mounting plate is fixed to the lower end face of the hydraulic push rod.

[0016] During polyester film cutting, the drive motor starts and controls the extension and retraction of the hydraulic push rod. Since the mounting plate is fixed to the lower end of the hydraulic push rod, when the hydraulic push rod extends, it pushes the mounting plate downward, causing the cutter and pressure block to move downward together. The pressure block first presses the film, and then the cutter performs the cutting. When the hydraulic push rod retracts, it drives the mounting plate and related components to return to their original position.

[0017] Preferably, the workbench is provided with a through groove for the cutting scissors to be inserted into, and when the cutting scissors are inserted into the through groove, the pressure block abuts against both sides of the through groove.

[0018] During the cutting process, as the cutting blades move downwards to cut the polyester film, they gradually engage with the slots created on the worktable. Simultaneously, pressure blocks abut against both sides of the slots as the cutting blades move downwards. This pressure against the slots increases the clamping force on the polyester film near the cutting area, further preventing displacement and deformation of the film during cutting and reducing wrinkles. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the polyester film cutting device in the embodiment.

[0020] Figure 2 This is a schematic diagram of the structure of the mounting base and mounting plate in the embodiment;

[0021] Figure 3 This is a schematic diagram of the mounting plate in the embodiment.

[0022] The names of the parts referred to by the numbers in the attached diagram are as follows:

[0023] 110. Workbench; 1101. Through slot; 120. Cutting shears; 130. Pressure block; 140. Mounting plate; 150. Spring; 1601. Limiting rod; 1602. Limiting plate; 170. Mounting base; 1801. Hydraulic push rod; 1802. Drive motor. Detailed Implementation

[0024] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0025] Example

[0026] like Figures 1-3As shown, the polyester film cutting device in this embodiment mainly consists of a workbench 110, a cutting blade 120, a pressure block 130, a mounting plate 140, a spring 150, a limiting rod 1601, a limiting plate 1602, a rubber layer 1301, a mounting base 170, a hydraulic push rod 1801, and a drive motor 1802.

[0027] The workbench 110 provides an operating surface for the entire device, and has a through slot 1101 for the cutting shears 120 to engage. The cutting shears 120 are positioned above the workbench 110 and fixed to the lower end face of the mounting plate 140. Pressure blocks 130 are symmetrically arranged on both sides of the cutting direction of the cutting shears 120. A limit rod 1601 is fixed to the upper end face of the pressure block 130, passing through a limit hole on the mounting plate 140, and a limit plate 1602 is fixed to the end of the limit rod extending out of the mounting plate 140. The upper end face of the pressure block 130 is connected to the lower end face of the mounting plate 140 via a spring 150, and a rubber layer 1301 is fixed to the bottom wall of the pressure block 130. The mounting base 170 is fixed to the workbench 110, and a hydraulic push rod 1801 and a drive motor 1802 are fixed to its lower end face. The mounting plate 140 is fixed to the lower end face of the hydraulic push rod 1801.

[0028] The operating principle of the cutting device in this embodiment is as follows:

[0029] The drive motor 1802 is started, controlling the hydraulic push rod 1801 to extend and push the mounting plate 140 downward. The mounting plate 140 drives the cutter 120 and the pressure block 130 to descend together. Since the height of the bottom wall of the rubber layer 1301 is lower than the height of the cutter 120 when the spring 150 is naturally hanging, the rubber layer 1301 contacts and presses the polyester film first. As the mounting plate 140 continues to descend, the pressure block 130 presses the polyester film, and the cutter 120 engages in the through slot 1101 of the worktable 110 to cut the film. During the descent of the pressure block 130, the limiting rod 1601 moves within the limiting hole to ensure that the pressure block 130 moves vertically without deviation.

[0030] By precisely pressing the pressure block 130 against both sides of the cutter 120, and by the buffering and friction-increasing effect of the rubber layer 1301, the displacement and deformation of the film during the cutting process are effectively reduced, significantly lowering the possibility of wrinkles and greatly improving product quality. The through groove 1101 provides an accurate cutting path for the cutter 120, and together with the stable pressing of the pressure block 130, the cutting is more precise, ensuring the consistency and accuracy of product dimensions.

[0031] The elastic compression of spring 150 and the soft material of rubber layer 1301 reduce excessive compression and damage to the film, helping to maintain the original physical and chemical properties of the film. The cooperation between limit rod 1601 and limit hole, as well as the precise drive of hydraulic push rod 1801, ensures the stability and reliability of the entire cutting process, reducing the occurrence of equipment failures and errors.

[0032] In summary, the above are merely preferred embodiments of this embodiment. All equivalent changes and modifications made in accordance with the scope of the patent application of this embodiment shall fall within the scope of the patent of this embodiment.

Claims

1. A cutting device for processing a polyester film, comprising a worktable (110) and a cutting knife (120), characterized in that: The cutting knife (120) is arranged above the workbench (110) and can move up and down, and a pressing block (130) is symmetrically arranged on both sides of the cutting direction of the cutting knife (120), and the pressing block (130) can move up and down synchronously with the cutting knife (120), and when the cutting knife (120) cuts the polyester film on the workbench (110), the pressing block (130) presses the polyester film; Further comprising a mounting plate (140) that can move up and down, the cutting knife (120) is fixed on the lower end surface of the mounting plate (140), the lower end surface of the mounting plate (140) is fixed with a spring (150), and the pressing block (130) is fixed on the lower end surface of the spring (150); The upper end surface of the pressing block (130) is fixed with a limiting rod (1601), the limiting rod (1601) is provided with two and symmetrically arranged on both sides of the spring (150), the mounting plate (140) is provided with a limiting hole for the limiting rod (1601) to pass out, and the limiting rod (1601) can move up and down in the limiting hole.

2. The cutting apparatus for processing a polyester film according to claim 1, characterized by: The end of the limiting rod (1601) extending out of the mounting plate (140) is fixed with a limiting plate (1602).

3. The cutting apparatus for processing a polyester film according to claim 1, characterized by: The bottom wall of the pressing block (130) is fixed with a rubber layer, and the height of the bottom wall of the rubber layer is lower than the height of the cutting knife (120) in the natural drooping state of the spring (150).

4. The cutting apparatus for processing a polyester film according to claim 1, characterized in that: Further comprising a mounting seat (170) fixed on the workbench (110), the lower end surface of the mounting seat (170) is fixed with a hydraulic push rod (1801) and a driving motor (1802), and the mounting plate (140) is fixed on the lower end surface of the hydraulic push rod (1801).

5. The cutting apparatus for processing a polyester film according to claim 1, characterized by: The workbench (110) is provided with a through slot (1101) for clamping the cutting knife (120), and when the cutting knife (120) is clamped in the through slot (1101), the pressing block (130) abuts against both sides of the through slot (1101).

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