Moisture-permeable PBT copolyester cutting device

Abstract

The utility model belongs to the technical field of PBT (polybutylene terephthalate) copolyester cutting, and particularly relates to a moisture-permeable PBT copolyester cutting device which comprises a base, a fixing frame is mounted on the base, a first pneumatic cylinder is mounted on the fixing frame, a first pneumatic rod is assembled at the acting end of the first pneumatic cylinder, a knife rest is fixedly connected to the bottom end of the first pneumatic rod, and a moisture-permeable PBT copolyester cutting device is mounted on the knife rest. A cutter rest is arranged on the fixing frame, a cutter is assembled in the cutter rest, limiting grooves are formed in the two side walls of the fixing frame, limiting blocks are arranged in the two limiting grooves, and one side wall of each limiting block is fixedly connected to the cutter rest. When the thin film cutting device is used for cutting a thin film, by arranging the stretching and tightening mechanism, the thin film can be ensured to keep stable tension in the cutting process, the thin film is prevented from loosening, the thin film can be kept in a tightened state, a cutting knife can more accurately cut along a preset track, and the cutting efficiency is improved. Therefore, the tidiness of the cut edge can be ensured, and the cutting precision and the overall quality of a product are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PBT copolyester cutting, in particular to a moisture-permeable PBT copolyester cutting device. Background Art

[0002] PET copolyester film is a new type of film material obtained by copolymerization modification on the basis of PET film. It can be used as a protective layer for surgical gowns to enhance the barrier ability of surgical gowns to pollutants such as blood, bacteria, and viruses, and has good waterproof and moisture permeability. During the processing, the PET copolyester film needs to be cut.

[0003] A Chinese patent with announcement number CN220162609U discloses a PBT copolyester waterproof and breathable film cutting device, including a base, a bracket fixedly installed on one side of the top of the base, a flattening mechanism provided in the middle of the base, a positioning structure movably provided in the bracket, a rocker penetrating the side of the bracket, the rocker is fixedly connected to one end of the threaded rod, a frame is installed on one end of the flattening mechanism away from the positioning structure, and a cutting device body is fixedly connected to the top of the frame; in order to avoid the low practicality of the film cutting device for adapting to the film and flattening before cutting, the PBT copolyester waterproof and breathable film cutting device can flatten the plastic film through the coordinated arrangement of the positioning structure, the flattening structure, the rocker and the bracket, thereby ensuring the flatness of the plastic film and facilitating its cutting.

[0004] The existing PET copolyester film cutting device lacks an effective stretching and tightening mechanism, which causes the film to easily relax during the cutting process. The relaxation of the film will make it impossible to maintain a stable tension and position during cutting, thereby causing the cutting line to deviate from the predetermined trajectory and the edge to become irregular or uneven, resulting in uneven edges of the cut film products, thereby reducing the cutting accuracy and the overall quality of the product. Therefore, a moisture-permeable PBT copolyester cutting device is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the problems raised by the above-mentioned background technology, the utility model provides a moisture-permeable PBT copolyester cutting device.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a moisture-permeable PBT copolyester cutting device described in the utility model comprises a base, a fixed frame is installed on the base, a first pneumatic cylinder is installed on the fixed frame, the action end of the first pneumatic cylinder is equipped with a first pneumatic rod, the bottom end of the first pneumatic rod is fixedly connected to a knife holder, a cutting knife is installed in the knife holder, limiting grooves are provided on both side walls of the fixed frame, limiting blocks are provided in the two limiting grooves, and one side wall of the limiting block is fixedly connected to the knife holder, first fixed seats are installed on both side walls of the knife holder, swing frames are hinged in the two first fixed seats, and the two swing frames are A stretching and tightening roller is rotatably installed, and a first spring is fixedly connected between the swing frame and the side wall of the knife frame. When cutting the film, the first pneumatic cylinder is started to make the first pneumatic rod drive the knife frame to move vertically downward. With the cooperation of the limit groove and the limit block, the cutting knife and the stretching and tightening mechanism move vertically downward stably. With the coordinated cooperation of the first spring and the swing frame, the stretching and tightening roller stretches and tightens the film. At the same time, as the cutting knife moves vertically downward, the film can be cut. By setting the stretching and tightening mechanism, during the cutting process, it can ensure that the film maintains a stable tension, avoids the film from being relaxed, and keeps the film in a taut state. It helps the cutting knife to cut more accurately along the predetermined trajectory, thereby ensuring the neatness of the cutting edge, greatly improving the cutting accuracy and the overall quality of the product.

[0007] Preferably, a limiting knife groove is provided on the base, and second fixed seats are fixedly connected to both sides of the bottom end of the limiting knife groove, whetstones are hinged in the two second fixed seats, and a second spring is fixedly connected between the whetstone and the base. During cutting, when the cutting knife moves vertically downward to pass through the limiting knife groove, the first spring cooperates to keep the whetstone in contact with the surface of the cutting knife at all times, so that the cutting knife blade can be ground. By grinding at any time, the sharpness of the blade can be maintained, and the sharp blade can penetrate the material more easily, reducing cutting resistance and cutting time. At the same time, the phenomenon of the blade becoming blunt due to excessive wear can be avoided, thereby extending the service life of the tool.

[0008] Preferably, two vertical plates are fixedly connected to the base, and the tops of the two vertical plates are provided with card slots. When the device is used, the card slots are provided to facilitate carding the entire roll of film on the two vertical plates.

[0009] Preferably, a slide groove is provided on the two vertical plates, and guide rods are fixedly connected in the two slide grooves. A lifting block is sleeved on the guide rod, and the lifting block is arranged in the slide groove. A pressure roller is installed on the two lifting blocks for cooperation and rotation. A third spring is fixedly connected between the lifting block and the bottom end of the slide groove, and the third spring is sleeved on the guide rod. During the unwinding process, the pressure roller can always be in contact with the outermost side of the film roll through the cooperation of the lifting block and the third spring. By maintaining close contact between the pressure roller and the film roll, the tension fluctuation caused by the change of the diameter of the film roll can be effectively reduced, thereby ensuring the smooth progress of the unwinding process. During the unwinding process, the tension of the film can be maintained stable to prevent the film from loosening due to uneven tension.

[0010] Preferably, two fixed plates are fixedly connected to the base, and rectangular grooves are formed on the two fixed plates, and sliders are provided in the two rectangular grooves. Pressing and smoothing rollers are installed on the two sliders for cooperation and rotation. A second pneumatic cylinder is fixedly connected to the top of the two fixed plates, and a second pneumatic rod is equipped with an active end of the second pneumatic cylinder, and the bottom end of the second pneumatic rod is fixedly connected to the slider. When cutting, the second pneumatic cylinder is started, so that the second pneumatic rod drives the slider to move vertically downward along the rectangular groove, and then the pressing and smoothing roller also moves downward, so that films of different thicknesses can be rolled and smoothed to avoid wrinkles in the films, which is convenient for subsequent precise cutting of the films.

[0011] Preferably, two vertical plates are fixedly connected to the base, and guide rollers are mounted on the two vertical plates for cooperation and rotation. When the device is used, the guide rollers are provided to facilitate auxiliary transportation of the film.

[0012] The utility model is beneficial in that:

[0013] 1. When the utility model is cutting the film, the first pneumatic cylinder is started, so that the first pneumatic rod drives the knife holder to move vertically downward, and the cutting knife and the stretching and tightening mechanism are stably moved vertically downward with the cooperation of the limit groove and the limit block, and the stretching and tightening roller is used to stretch and tighten the film with the cooperation of the first spring and the swing frame. At the same time, the film can be cut as the cutting knife moves vertically downward. By setting up the stretching and tightening mechanism, the film can maintain a stable tension during the cutting process, and the film can be prevented from being loosened, so that the film can be kept in a taut state. It helps the cutting knife to cut more accurately along the predetermined trajectory, thereby ensuring the neatness of the cutting edge, greatly improving the cutting accuracy and the overall quality of the product;

[0014] 2. When the utility model is cutting, when the cutting knife moves vertically downward to pass through the limiting knife groove, the first spring cooperates to keep the whetstone in contact with the surface of the cutting knife at all times, so that the cutting knife blade can be sharpened. By grinding at any time, the sharpness of the blade can be maintained. The sharp blade can penetrate the material more easily, reducing the cutting resistance and cutting time. At the same time, it can avoid the phenomenon that the blade becomes blunt due to excessive wear, thereby extending the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the device;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the cutting mechanism and the stretching and tightening mechanism;

[0018] Figure 3 It is a schematic diagram of the cutaway three-dimensional structure of the cutting mechanism and the stretching and tightening mechanism;

[0019] Figure 4 It is a schematic diagram of the local three-dimensional structure of the device;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping mechanism.

[0021] In the figure: 1. base; 2. fixed frame; 3. first pneumatic cylinder; 4. first pneumatic rod; 5. knife holder; 6. cutting knife; 7. limiting groove; 8. limiting block; 9. first fixed seat; 10. swing frame; 11. stretching and tightening roller; 12. first spring; 13. limiting knife groove; 14. second fixed seat; 15. grindstone; 16. second spring; 17. vertical plate; 18. slot; 19. slide; 20. guide rod; 21. lifting block; 22. third spring; 23. pressing roller; 24. vertical plate; 25. guide roller; 26. fixed plate; 27. rectangular groove; 28. slide block; 29. ​​pressing and leveling roller; 30. second pneumatic cylinder; 31. second pneumatic rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 As shown, a moisture-permeable PBT copolyester cutting device comprises a base 1, a fixed frame 2 is installed on the base 1, a first pneumatic cylinder 3 is installed on the fixed frame 2, a first pneumatic rod 4 is installed on the action end of the first pneumatic cylinder 3, a knife frame 5 is fixedly connected to the bottom end of the first pneumatic rod 4, a cutting knife 6 is installed in the knife frame 5, limiting grooves 7 are provided on both side walls of the fixed frame 2, limiting blocks 8 are provided in the two limiting grooves 7, and one side wall of the limiting block 8 is fixedly connected to the knife frame 5, first fixed seats 9 are installed on both side walls of the knife frame 5, swing frames 10 are hinged in the two first fixed seats 9, stretching and tightening rollers 11 are rotatably installed in the two swing frames 10, a first spring 12 is fixedly connected between the swing frame 10 and the side wall of the knife frame 5, a limiting knife groove 13 is provided on the base 1, and the limiting knife groove 13 is provided with a spring. The two sides of the bottom port are fixedly connected with a second fixed seat 14, and the two second fixed seats 14 are hinged with a grindstone 15, and a second spring 16 is fixedly connected between the grindstone 15 and the base 1; when cutting the film, start the first pneumatic cylinder 3, so that the first pneumatic rod 4 drives the knife holder 5 to move vertically downward, and with the cooperation of the limit groove 7 and the limit block 8, the cutting knife 6 and the stretching and tightening mechanism are stably moved vertically downward, and with the cooperation of the first spring 12 and the swing frame 10, the stretching and tightening roller 11 stretches and tightens the film, and at the same time, as the cutting knife 6 moves vertically downward, the film can be cut. By setting up the stretching and tightening mechanism, during the cutting process, it can ensure that the film maintains a stable tension, avoid the film from being relaxed, and keep the film in a taut state. It helps the cutting knife 6 to cut more accurately along the predetermined trajectory, thereby ensuring the neatness of the cutting edge, greatly improving the cutting accuracy and the overall quality of the product;

[0024] During cutting, when the cutting knife 6 moves vertically downward to pass through the limiting knife groove 13, the first spring 12 cooperates to keep the whetstone 15 in contact with the surface of the cutting knife 6 at all times, so that the blade of the cutting knife 6 can be sharpened. By grinding at any time, the sharpness of the blade can be maintained. The sharp blade can penetrate the material more easily, reducing the cutting resistance and cutting time. At the same time, it can avoid the blade from becoming blunt due to excessive wear, thereby extending the service life of the tool.

[0025] See also Figure 4As shown, the base 1 is fixed with two vertical plates 17, the tops of the two vertical plates 17 are provided with a slot 18, the two vertical plates 17 are provided with a slide slot 19, the two slide slots 19 are fixed with guide rods 20, the guide rods 20 are sleeved with a lifting block 21, and the lifting block 21 is arranged in the slide slot 19, the two lifting blocks 21 are rotated together with a pressing roller 23, a third spring 22 is fixed between the lifting block 21 and the bottom end of the slide slot 19, and the third spring 22 is sleeved on the guide rod 20, the base 1 There are two vertical plates 24 fixedly connected, and the two vertical plates 24 are equipped with guide rollers 25 for rotation. During the unwinding process, the lifting block 21 cooperates with the third spring 22 to ensure that the pressure roller 23 is always in contact with the outermost side of the film roll. By maintaining close contact between the pressure roller 23 and the film roll, the tension fluctuation caused by the change in the diameter of the film roll can be effectively reduced, ensuring the smooth unwinding process. During the unwinding process, the tension of the film can be maintained stable to prevent the film from loosening due to uneven tension.

[0026] See also Figure 5 As shown, two fixed plates 26 are fixedly connected to the base 1, and rectangular grooves 27 are opened on the two fixed plates 26, and sliders 28 are arranged in the two rectangular grooves 27. The two sliders 28 are equipped with pressing and smoothing rollers 29 for rotation. The top ends of the two fixed plates 26 are fixedly connected to the second pneumatic cylinders 30, and the working ends of the second pneumatic cylinders 30 are equipped with second pneumatic rods 31, and the bottom ends of the second pneumatic rods 31 are fixedly connected to the sliders 28; when cutting, the second pneumatic cylinders 30 are started, so that the second pneumatic rods 31 drive the sliders 28 to move vertically downward along the rectangular grooves 27, and then the pressing and smoothing rollers 29 are also moved downward, so that films of different thicknesses can be rolled and smoothed to avoid wrinkles in the films, which is convenient for subsequent precise cutting of the films.

[0027] Working principle: The existing PET copolyester film cutting device lacks an effective stretching and tightening mechanism, which makes the film prone to relaxation during the cutting process. The relaxation of the film will make it impossible to maintain a stable tension and position during cutting, which will cause the cutting line to deviate from the predetermined trajectory, and the edge will become irregular or uneven, resulting in uneven edges of the cut film products, thereby reducing the cutting accuracy and the overall quality of the product; Therefore, in order to solve the above problems, a moisture-permeable PBT copolyester cutting device is proposed. In the cutting overload, the whole roll of film is firstly The film is clamped on the vertical plate 17, and then one end of the film is passed through the bottom end of the guide roller 25, the bottom end of the pressing and leveling roller 29 and the bottom of the cutting mechanism in sequence. Then the second pneumatic cylinder 30 is started, so that the second pneumatic rod 31 drives the slider 28 to move vertically downward along the rectangular groove 27, and then the pressing and leveling roller 29 also moves downward, so that films of different thicknesses can be rolled and leveled to avoid wrinkles in the film, which is convenient for subsequent precise cutting of the film. When cutting, the first pneumatic cylinder 3 is started, so that the first pneumatic rod 4 drives the knife holder 5 to move vertically downward along the rectangular groove 27. The cutting knife 6 and the stretching and tightening mechanism move downward vertically stably under the cooperation of the limiting groove 7 and the limiting block 8. The stretching and tightening roller 11 stretches and tightens the film under the cooperation of the first spring 12 and the swing frame 10. At the same time, as the cutting knife 6 moves downward vertically, the film can be cut. By setting the stretching and tightening mechanism, the film can maintain a stable tension during the cutting process, avoiding the film from being relaxed, so that the film can be kept in a taut state, which helps the cutting knife 6 to move more accurately along the predetermined track. When the cutting knife 6 moves vertically downward to pass through the limiting knife groove 13, the whetstone 15 is always in contact with the surface of the cutting knife 6 through the cooperation of the first spring 12, so that the cutting knife 6 can be sharpened. By grinding at any time, the sharpness of the cutting knife can be maintained. The sharp cutting knife can penetrate the material more easily, reduce the cutting resistance and cutting time, and avoid the phenomenon that the cutting knife becomes blunt due to excessive wear, thereby extending the service life of the tool.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A moisture permeable PBT copolyester cutting device, characterized in that: The invention comprises a base (1), a fixing frame (2) is installed on the base (1), a first pneumatic cylinder (3) is installed on the fixing frame (2), a first pneumatic rod (4) is installed on the action end of the first pneumatic cylinder (3), a tool holder (5) is fixedly connected to the bottom end of the first pneumatic rod (4), a cutting knife (6) is installed in the tool holder (5), limiting grooves (7) are provided on both side walls of the fixing frame (2), limiting blocks (8) are provided in both limiting grooves (7), and one side wall of the limiting block (8) is fixedly connected to the tool holder (5), and the two side walls of the tool holder (5) are provided with a plurality of limiting blocks (8). A first fixed seat (9) is installed on each of the two first fixed seats (9), a swing frame (10) is hingedly connected inside each of the two first fixed seats (9), a stretching and tightening roller (11) is rotatably installed inside each of the two swing frames (10), a first spring (12) is fixedly connected between the swing frame (10) and the side wall of the knife holder (5), a limited knife groove (13) is provided on the base (1), second fixed seats (14) are fixedly connected to both sides of the bottom end of the limited knife groove, a whetstone (15) is hingedly connected inside each of the two second fixed seats (14), and a second spring (16) is fixedly connected between the whetstone (15) and the base (1).

2. A moisture permeable PBT copolyester cutting device according to claim 1, characterized in that: Two vertical plates (17) are fixedly connected to the base (1), the tops of the two vertical plates (17) are provided with a clamping groove (18), the two vertical plates (17) are provided with a sliding groove (19), and the two sliding grooves (19) are fixedly connected with a guide rod (20).

3. A moisture permeable PBT copolyester cutting device according to claim 2, characterized in that: A lifting block (21) is sleeved on the guide rod (20), and the lifting block (21) is arranged in the slide groove (19). A pressing roller (23) is installed on the two lifting blocks (21) for rotation. A third spring (22) is fixedly connected between the lifting block (21) and the bottom end of the slide groove (19), and the third spring (22) is sleeved on the guide rod (20).

4. A moisture permeable PBT copolyester cutting device according to claim 1, characterized in that: Two fixing plates (26) are fixedly connected to the base (1), and rectangular grooves (27) are provided on the two fixing plates (26). Slide blocks (28) are provided in the two rectangular grooves (27), and pressing and leveling rollers (29) are installed to cooperate with the two slide blocks (28) for rotation.

5. A moisture permeable PBT copolyester cutting device according to claim 4, characterized in that: The top ends of the two fixed plates (26) are both fixedly connected to a second pneumatic cylinder (30), the working end of the second pneumatic cylinder (30) is equipped with a second pneumatic rod (31), and the bottom end of the second pneumatic rod (31) is fixedly connected to the slider (28).

6. A moisture permeable PBT copolyester cutting device according to claim 1, characterized in that: Two vertical plates (24) are fixedly connected to the base (1), and guide rollers (25) are mounted on the two vertical plates (24) for rotation in coordination.

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