Polyester film cutting device with pressing mechanism

Abstract

The utility model provides a polyester film cutting device with a pressing mechanism. The polyester film cutting device comprises a bottom plate, a support is perpendicularly fixed to the top of the bottom plate, a traction base is arranged on the inner wall of the support in a sliding mode, an air cylinder is installed between the traction base and the support, a cutter is fixed to the lower portion of the traction base, and a cutter edge is arranged on the surface of the bottom plate. The pressing mechanisms are arranged on the two sides of the support, when the cutter is driven by the air cylinder to move downwards to cut the polyester film, the polyester film can be fixed from the two sides of the cut area of the polyester film through the pressing mechanisms, and therefore the situation that cutting errors occur due to displacement of the polyester film in the cutting period is prevented; and at the moment, the transverse stretching mechanism acts to stretch the polyester film towards the two ends with the cutting area of the polyester film as the symmetry axis, so that the polyester film is always kept in a tensioned state above the cutter edge, the cutter can rapidly cut the polyester film, and the cutting precision of the polyester film is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyester film cutting, in particular to a polyester film cutting device with a pressing mechanism. Background Art

[0002] Polyester film refers to a film material made from polyethylene terephthalate. Due to its excellent overall performance, it is widely used in industries such as fiberglass, building materials, and printing. It has good air tightness and fragrance retention, moderate moisture resistance, and its moisture permeability decreases at low temperatures. PET film has excellent mechanical properties, and its toughness is the best of all thermoplastics. Its tensile strength and impact strength are much higher than those of ordinary films. It also has good support and dimensional stability, making it suitable for secondary processing such as printing and paper bags. PET film also has excellent heat and cold resistance, as well as good chemical and oil resistance.

[0003] Polyester film needs to be cut during processing. Since polyester film itself is a flexible material, when it is cut, the cutter will squeeze the polyester film and cause it to deform. The two sides squeezed by the cutter will generate tension, causing the polyester film to shift during cutting, resulting in cutting errors. Utility Model Content

[0004] The purpose of the utility model is to provide a polyester film cutting device with a pressing mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A polyester film cutting device with a clamping mechanism comprises a base plate, a bracket vertically fixed to the top of the base plate, a traction seat slidably provided on the inner wall of the bracket, a cylinder installed between the traction seat and the bracket, a cutter fixed below the traction seat, a knife edge provided on the surface of the base plate, and a clamping mechanism provided on the traction seat;

[0007] The clamping mechanism includes a pressure plate, a sleeve, a spring, a driving rod and a connecting piece. The sleeve is fixed to the top of the pressure plate, the bottom end of the driving rod is slidably arranged inside the sleeve, the side of the driving rod is connected to the traction seat through a connecting piece, the spring is fixed between the pressure plate and the driving rod, and the surface of the spring is in contact with the inner wall of the sleeve. A transverse stretching mechanism is provided between the connecting piece and the bracket.

[0008] Preferably, the connecting member includes a fixed rod and a movable rod, the fixed rod is vertically arranged on the side of the traction seat, one end of the movable rod is slidably arranged in the fixed rod, and the other end of the movable rod is fixed to the surface of the driving rod.

[0009] Preferably, the transverse stretching mechanism includes a guide rod, a side plate and a slide groove, the side plate is vertically fixed between the bracket and the base, the slide groove is arranged on the surface of the side plate, one end of the guide rod is fixed to the surface of the movable rod, and the other end of the guide rod is slidably arranged in the slide groove.

[0010] Preferably, the chute is divided into a vertical section and an inclined section, and the starting point of the vertical section and the terminal end of the inclined section are both set to be circular.

[0011] Preferably, a limiting track is provided on the inner wall of the bracket, a groove is provided on the surface of the traction seat, and the traction seat is slidably arranged on the surface of the limiting track through the groove.

[0012] Preferably, a guide groove is provided on the inner wall of the sleeve, and a guide block is provided on the surface of the driving rod, and the guide block is slidably arranged in the guide groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model is provided with a clamping mechanism on both sides of the bracket. When the cutter moves downward under the drive of the cylinder to cut the polyester film, the clamping mechanism can fix the polyester film from both sides of the cut area to prevent the polyester film from being displaced during the cutting process, resulting in cutting errors. At this time, the transverse stretching mechanism is activated to stretch the polyester film towards both ends of the symmetrical axis with the cutting area of the polyester film as the cutting area, so that the polyester film is always kept in a tensioned state above the knife edge, so that the cutter can quickly cut the polyester film, further improving the cutting accuracy of the polyester film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of the chute of the utility model;

[0018] Figure 4 This is a schematic diagram of the main structure of the fifth wheel of the present utility model;

[0019] Figure 5 This is a schematic diagram of the main structure of the connector of the utility model;

[0020] Figure 6 This is a schematic diagram of the connection structure between the sleeve and the drive rod of the utility model.

[0021] In the figure: 1. Base plate; 2. Bracket; 3. Traction seat; 4. Cylinder; 5. Cutter; 6. Blade; 7. Pressure plate; 8. Sleeve; 9. Spring; 10. Drive rod; 11. Fixed rod; 12. Movable rod; 13. Guide rod; 14. Side plate; 15. Slide; 16. Vertical section; 17. Inclined section; 18. Limiting track; 19. Groove; 20. Guide groove; 21. Guide block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0023] See also Figure 1-6 The present invention provides a polyester film cutting device with a clamping mechanism, comprising a base plate 1, a bracket 2 is vertically fixed to the top of the base plate 1, a traction seat 3 is slidingly provided on the inner wall of the bracket 2, a cylinder 4 is installed between the traction seat 3 and the bracket 2, a cutter 5 is fixed under the traction seat 3, a knife edge 6 is provided on the surface of the base plate 1, and a clamping mechanism is provided on the traction seat 3.

[0024] See also Figure 1 and 2 When in use, it needs to be installed at the connection between the conveying equipment and the winding equipment, and the polyester film passes between the cutter 5 and the bottom plate 1. The cylinder 4 can drive the traction seat 3 to move up and down inside the bracket 2, and the traction seat 3 can drive the cutter 5 to move synchronously, so that the cutter 5 can enter the blade 6 when moving downward, thereby realizing the cutting of the polyester film.

[0025] The clamping mechanism includes a pressure plate 7, a sleeve 8, a spring 9, a driving rod 10 and a connecting piece. The sleeve 8 is fixed to the top of the pressure plate 7, and the bottom end of the driving rod 10 is slidably arranged inside the sleeve 8. The side of the driving rod 10 is connected to the traction seat 3 through a connecting piece. The spring 9 is fixed between the pressure plate 7 and the driving rod 10, and the surface of the spring 9 is in contact with the inner wall of the sleeve 8. A transverse stretching mechanism is provided between the connecting piece and the bracket 2. The connecting piece includes a fixed rod 11 and a movable rod 12. The fixed rod 11 is vertically arranged on the side of the traction seat 3. One end of the movable rod 12 is slidably arranged in the fixed rod 11, and the other end of the movable rod 12 is fixed to the surface of the driving rod 10.

[0026] See also Figure 2 and 5When the traction seat 3 moves downward, it can drive the driving rod 10 to move synchronously through the fixed rod 11 and the movable rod 12. The driving rod 10 can drive the pressure plate 7 to move downward through the spring 9 and the sleeve 8. When the pressure plate 7 moves downward, it will first contact the surface of the polyester film, so that the polyester film is fixed to the base plate 1, and as the traction seat 3 continues to move downward, the cutter 5 will gradually approach the blade 6. At this time, the driving rod 10 continues to move downward, but the base plate 1 has pressed the polyester film on the base plate 1. Therefore, at this time, the driving rod 10 can squeeze the spring 9 inside the sleeve 8, causing the spring 9 to compress and store energy. This part of the potential energy can be transferred to the surface of the pressure plate 7, thereby tightly fixing the polyester film to the base plate 1 through the pressure plate 7.

[0027] The lateral stretching mechanism includes a guide rod 13, a side plate 14 and a slide groove 15. The side plate 14 is vertically fixed between the bracket 2 and the base. The slide groove 15 is arranged on the surface of the side plate 14. One end of the guide rod 13 is fixed to the surface of the movable rod 12, and the other end of the guide rod 13 is slidably arranged in the slide groove 15. The slide groove 15 is divided into a vertical section 16 and an inclined section 17. The starting point of the vertical section 16 and the terminal end of the inclined section 17 are both set to be circular.

[0028] See also Figure 2 and 3 , in the process from the initial state to the contact with the polyester film by the pressure plate 7, the driving rod 10 drives the guide rod 13 to move synchronously. At this time, one end of the guide rod 13 just moves from the starting end of the vertical section 16 to the end of the vertical section 16. As the driving rod 10 continues to move downward, the driving rod 10 can drive the guide rod 13 to continue to move. However, since the end of the vertical section 16 is connected to the inclined section 17, one end of the guide rod 13 always descends in the inclined section 17. Under the guidance of the inclined section 17, the driving rod 10 will move horizontally away from the traction seat 3. At this time, one end of the movable rod 12 will axially translate at one end of the fixed rod 11. With the continuous compression of the spring 9, the pressure plate 7 can drive the polyester film to be continuously tensioned through the gradually increasing static friction force, so that the area to be cut on the surface of the polyester film (i.e., the area directly below the cutter 5) is always kept in a tensioned state to prevent deviation during cutting.

[0029] A limiting track 18 is provided on the inner wall of the bracket 2 , and a groove 19 is provided on the surface of the traction seat 3 . The traction seat 3 is slidably arranged on the surface of the limiting track 18 through the groove 19 .

[0030] See also Figure 3 and 4 When the traction seat 3 moves vertically, it can drive the groove 19 to move synchronously on the surface of the limiting track 18. Through the cooperation of the groove 19 and the limiting track 18, the movement process of the traction seat 3 can be limited to prevent the traction seat 3 from deflecting during movement.

[0031] A guide groove 20 is provided on the inner wall of the sleeve 8 , and a guide block 21 is provided on the surface of the driving rod 10 . The guide block 21 is slidably disposed in the guide groove 20 .

[0032] See also Figure 6 When the pressure plate 7 contacts the surface of the polyester film, it will be blocked by the bottom plate 1 and cannot move further downward. At this time, the driving rod 10 can drive the guide block 21 to move downward inside the guide groove 20. The cooperation between the guide block 21 and the guide groove 20 can limit the movement of the driving rod 10, and a notch is provided on the surface of the sleeve 8. The notch can accommodate the movable rod 12 when the driving rod 10 moves downward, so as to compress the spring 9.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyester film cutting device with a pressing mechanism, comprising a bottom plate (1), characterized in that: A bracket (2) is vertically fixed to the top of the base plate (1), a traction seat (3) is slidably provided on the inner wall of the bracket (2), a cylinder (4) is installed between the traction seat (3) and the bracket (2), a cutter (5) is fixed below the traction seat (3), a knife edge (6) is provided on the surface of the base plate (1), and a pressing mechanism is provided on the traction seat (3); The clamping mechanism comprises a pressing plate (7), a sleeve (8), a spring (9), a driving rod (10) and a connecting piece. The sleeve (8) is fixed to the top of the pressing plate (7). The bottom end of the driving rod (10) is slidably arranged inside the sleeve (8). The side of the driving rod (10) is connected to the traction seat (3) through the connecting piece. The spring (9) is fixed between the pressing plate (7) and the driving rod (10), and the surface of the spring (9) is in contact with the inner wall of the sleeve (8). A transverse stretching mechanism is provided between the connecting piece and the bracket (2).

2. The polyester film cutting device with a pressing mechanism according to claim 1, characterized in that: The connecting member comprises a fixed rod (11) and a movable rod (12), wherein the fixed rod (11) is vertically arranged on the side of the traction seat (3), one end of the movable rod (12) is slidably arranged in the fixed rod (11), and the other end of the movable rod (12) is fixed to the surface of the driving rod (10).

3. The polyester film cutting device with a pressing mechanism according to claim 2, characterized in that: The transverse stretching mechanism includes a guide rod (13), a side plate (14) and a slide groove (15), wherein the side plate (14) is vertically fixed between the bracket (2) and the base, and the slide groove (15) is arranged on the surface of the side plate (14). One end of the guide rod (13) is fixed to the surface of the movable rod (12), and the other end of the guide rod (13) is slidably arranged in the slide groove (15).

4. The polyester film cutting device with a pressing mechanism according to claim 3, characterized in that: The chute (15) is divided into a vertical section (16) and an inclined section (17), and the starting point of the vertical section (16) and the terminal end of the inclined section (17) are both set to be circular.

5. The polyester film cutting device with a pressing mechanism according to claim 1, characterized in that: A limiting track (18) is provided on the inner wall of the bracket (2), a groove (19) is provided on the surface of the traction seat (3), and the traction seat (3) is slidably arranged on the surface of the limiting track (18) through the groove (19).

6. The polyester film cutting device with a pressing mechanism according to claim 1, characterized in that: The inner wall of the sleeve (8) is provided with a guide groove (20), and the surface of the driving rod (10) is provided with a guide block (21), and the guide block (21) is slidably arranged in the guide groove (20).

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