Automatic cutting equipment and polyurethane film cutting method based on pressing function

Abstract

The invention relates to the technical field of polyurethane film production, in particular to automatic cutting equipment and a polyurethane film cutting method based on a pressing function, the automatic cutting equipment comprises a bearing seat, a bearing frame is arranged on one side of the bearing seat, a coiled film is arranged on the bearing frame, and one end of the coiled film extends to be laid on the bearing seat; two groups of longitudinal parts are arranged on the bearing seat, a conveying assembly is arranged between the two groups of longitudinal parts, the conveying assembly comprises roller groups arranged on the longitudinal parts, and a cutting assembly used for cutting a film is arranged between the roller groups; the pressing assembly is arranged on the bearing seat and comprises a reciprocating structure and a lifting structure, the lifting structure is matched with a pressing strip arranged on the bearing seat, when the conveying assembly conveys the thin film, the lifting structure can drive the pressing strip to press the thin film close to the left side and the right side of the roller set, and when the cutting assembly acts, the lifting structure can drive the pressing strip to press the thin film close to the left side and the right side of the roller set. And the lifting structure can drive the pressing strip to transport the broken film.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane film production, in particular to automatic cutting equipment and a polyurethane film cutting method based on a pressing function. Background Art

[0002] With the increasing application of polymer films, the requirements for the performance of film materials are getting higher and higher. Commonly used polysulfone and polyolefin films can no longer fully meet the market demand. In this case, polyurethane films came into being. At present, the development and application of polyurethane films are in full swing abroad, and domestic research and application are also starting. Polyurethane films are mainly prepared by extrusion, calendering and blow molding. Due to the characteristics of the polyurethane molecular structure, polyurethane films will be rolled up during production. The rolled polyurethane films can be cut to a certain length with the help of cutting equipment to obtain the actual required size.

[0003] The existing cutting device adopts a top-down cutting method during the cutting process. This cutting method lacks a corresponding pressing structure. Therefore, when the film is cut, the downward pressing blade will cause the polyurethane films on both sides to shrink, which will reduce the cutting progress of the film. At the same time, when cutting, the polyurethane film will have obvious wrinkles at the cutting position, and the existence of these wrinkles will cause the cut edge of the polyurethane film to deform. Summary of the invention

[0004] The object of the present invention is to provide an automatic cutting device and a polyurethane film cutting method based on a pressing function to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: An automatic cutting device comprises: a supporting seat, a supporting frame is arranged on one side of the supporting seat, a rolled film is arranged on the supporting frame, and one end of the rolled film extends and is laid on the supporting seat; Two groups of longitudinal members are arranged on the support seat, a transport assembly is arranged between the two groups of longitudinal members, the transport assembly includes a roller group arranged on the longitudinal members, and a cutting assembly for cutting the film is arranged between the roller groups; A pressing assembly is arranged on the supporting seat, and includes a reciprocating structure and a lifting structure. The lifting structure cooperates with a pressing bar arranged on the supporting seat. When the transport assembly transports the film, the lifting structure can drive the pressing bar to press the film on the left and right sides of the roller group, and when the cutting assembly is in action, the lifting structure can drive the pressing bar to transport the cut film.

[0006] The automatic cutting equipment as described above: the roller group includes a feeding roller, and two groups of the feeding rollers are symmetrically arranged along the length direction of the longitudinal member. The two groups of the feeding rollers are connected by a linkage belt, and each group of the feeding rollers is provided with an elastic pressing structure.

[0007] The automatic cutting equipment as described above: the elastic pressing structure is arranged in multiple groups equidistantly along the axial direction of the feeding roller, and each group of the elastic pressing structure includes multiple groups of plug-in cylinders equidistantly arranged along the circumferential direction of the feeding roller, and a spring is slidably arranged in the plug-in cylinder, one end of the spring abuts against the bottom of the plug-in cylinder and the other end abuts against an abutment plate slidably arranged in the plug-in cylinder.

[0008] The automatic cutting device as described above: the cutting assembly includes a driving rod, the driving rod is rotatably connected to two groups of support members fixedly arranged on the supporting seat, a guide rod is fixedly arranged between the two groups of support members, and a movable sleeve slidably connected to the guide rod is sleeved on the driving rod, a cutting knife is arranged on the movable sleeve, and a protrusion is formed on the inner wall of the movable sleeve, and the protrusion is slidably arranged in a spiral groove opened on the outer wall of the driving rod.

[0009] The automatic cutting device as described above: the reciprocating structure includes a pulley rotatably mounted on the supporting seat, and two groups of pulleys are arranged along the length direction of the supporting seat, one group of pulleys away from the roller group is connected to the driving rod through a first linkage structure, and the other group of pulleys is connected to the roller group through a second linkage structure; A belt is arranged between the two groups of pulleys, and a protrusion is formed on the belt; It also includes a reciprocating plate slidably arranged on the supporting seat, wherein a moving groove is provided on a side of the reciprocating plate facing the belt, and the protruding column is slidably arranged in the moving groove.

[0010] The automatic cutting equipment as described above: the second linkage structure includes a second sleeve cylinder rotatably mounted on the supporting seat, a rotating shaft is inserted into the second sleeve cylinder, a second pawl is elastically arranged on the rotating shaft, the second pawl cooperates with a ratchet ring formed inside the second sleeve cylinder, and the rotating shaft is connected to the roller group through a gear group and a linkage belt.

[0011] The automatic cutting equipment as described above: the first linkage structure includes a first sleeve tube rotatably mounted on the supporting seat, the first sleeve tube is connected to the second sleeve tube via a linkage belt, and a linkage rod is inserted into the first sleeve tube, the linkage rod is connected to the driving rod via a linkage belt, and a first pawl is elastically arranged on the linkage rod, and the first pawl cooperates with a ratchet ring formed on the inner wall of the first sleeve tube.

[0012] The automatic cutting equipment as described above: the lifting structure includes a guide member and a lifting member, the guide member includes a guide plate fixedly arranged on the supporting seat, the guide plate is provided with an engaging groove at one end away from the belt, the engaging groove includes a horizontal groove, an ascending groove and a descending groove, and a deflection plate is arranged between the horizontal groove and the descending groove, and the deflection plate is connected to the guide plate through a spring sheet.

[0013] The automatic cutting device as described above: the lifting member includes a sliding member fixedly connected to the pressing strip, the sliding member is slidably arranged in a sliding groove opened on the reciprocating plate, and a sliding rod is formed on the sliding member, and the sliding rod is slidably arranged in the engaging groove.

[0014] A polyurethane film cutting method based on a pressing function is also proposed, using the automatic cutting device as described above, comprising the following steps: Step 1: Before use, extend one end of the rolled film to the support seat and pass through the roller group. At this time, the cutting knife is in contact with the support seat, and the pressing strip is in contact with the support seat. Then the driving rod is driven to rotate. The rotating driving rod will drive the cutting knife to move a stroke distance, thereby cutting the film; Step 2: After the cutting is completed, the driving rod reverses, drives the cutting knife back to the initial position and then stops rotating. During this process, the driving rod drives the reciprocating structure to move with the cooperation of the first linkage structure. At this time, the pressing bar away from the support frame will drive the cut film to gradually move away from the roller group with the cooperation of the lifting structure, while the pressing bar close to the support frame will move toward the support frame, and at the same time, with the cooperation of the lifting structure, the film close to the support frame will be pressed; Step 3: After the cutting blade returns to the initial position, the roller group starts to rotate, and with the cooperation of the second linkage structure, the reciprocating structure continues to move, driving the two groups of pressing bars to move toward the roller group. At this time, the pressing bars close to the support frame will transport the film, and the pressing bars far away from the support frame will gradually approach the roller group with the cooperation of the lifting structure, and press the film transmitted through the roller group; Step 4: Repeat the above steps 1, 2, and 3 to complete the continuous cutting of the film.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the embodiment of the present invention, by setting a transport component, the film laid on the receiving plate can be transported by utilizing the cooperation of two sets of synchronously rotating feeding rollers and abutment plates arranged on the feeding rollers; and because the abutment plates are elastically arranged on the feeding rollers, when the feeding rollers transport the film, the abutment plates in contact with the receiving plate can press the two ends of the cut film strip, so that when the film is cut, the cut edge of the film will not be wrinkled; At the same time, by setting a cutting component, the cutting component is used to drive the circular cutting knife to perform reciprocating motion. When the sharp blade rolls, the film can be cut quickly. When cutting, due to the abutment and pressing of the abutment plates on both sides of the cutting knife, the film will not be displaced or wrinkled, and then the cut edge of the film will not be deformed, thereby improving the cutting accuracy of the film; The cutting assembly and the transport assembly are connected to the pressing assembly arranged on the supporting seat through the first linkage structure and the second linkage structure respectively. The pressing assembly includes a reciprocating structure and a lifting structure. During the operation of the cutting assembly and the transport assembly, the cooperation between the reciprocating structure and the lifting structure can drive the pressing strip arranged on the supporting seat to press or transport the film, thereby further preventing the film from wrinkling during cutting. The above-mentioned overall process adopts the mutual cooperation and restriction between mechanical structures, and can perform continuous cutting and segmenting operations on the rolled film. Compared with the ordinary method of cutting directly from top to bottom, it can avoid wrinkles in the polyurethane film during cutting. At the same time, with the cooperation of the pressing strip and the abutment plate, it can avoid the situation where the polyurethane film shrinks to the middle during cutting, resulting in reduced cutting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the automatic cutting equipment.

[0017] Figure 2 It is a schematic diagram of the structure inside the support seat in the automatic cutting equipment.

[0018] Figure 3 It is a schematic diagram of the structure of the transport component in the automatic cutting equipment.

[0019] Figure 4 It is a schematic diagram of the structure in which the feeding roller and the cutting component are connected with the pressing component in the automatic cutting equipment.

[0020] Figure 5 It is a schematic diagram of the structure of the cutting component in the automatic cutting equipment.

[0021] Figure 6 It is a schematic diagram of the structure of the connection between the transport component and the pressing component in the automatic cutting equipment.

[0022] Figure 7 It is a schematic diagram of the structure of the connection between the cutting component and the pressing component in the automatic cutting equipment.

[0023] Figure 8 It is a schematic diagram of the structure of the pressing component in the automatic cutting equipment.

[0024] Fig. 9 It is a schematic diagram of the structure of the lifting parts in the automatic cutting equipment.

[0025] Fig.10 It is a structural schematic diagram of the first linkage structure in the automatic cutting device.

[0026] Fig.11 It is a structural schematic diagram of the second linkage structure in the automatic cutting device.

[0027] Fig.12 It is a structural schematic diagram of the reciprocating structure in the automatic cutting equipment.

[0028] Fig.13 It is a schematic diagram of the structure of the guide plate in the automatic cutting equipment.

[0029] In the figure: 1, supporting seat; 101, receiving plate; 2, supporting frame; 3, rolled film; 4, longitudinal member; 5, sensor; 6, driving rod; 601, spiral groove; 7, pressing strip; 8, roller group; 801, feeding roller; 9, guide plate; 901, horizontal groove; 902, ascending groove; 903, descending groove; 10, gear group; 1001, slave gear; 1002, main gear; 11, belt; 1101, protruding column; 12, abutting plate; 13, plug-in cylinder; 14, spring; 15, pulley; 16. Moving sleeve; 1601. Protrusion; 1602. Cutting knife; 1603. Lifting device; 17. Support member; 1701. Guide rod; 18. Linking rod; 1801. First ratchet; 19. First sleeve tube; 20. Second sleeve tube; 21. Sliding member; 2101. Sliding rod; 22. Deflection plate; 23. Reciprocating plate; 2301. Connecting rod; 2302. Slide groove; 24. Rotating shaft; 2401. Second ratchet; 25. Shrapnel; 26. Driving motor; 27. Servo motor. DETAILED DESCRIPTION

[0030] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0031] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0032] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0033] See also Figure 1-Figure 13In an embodiment of the present invention, an automatic cutting device includes: A supporting seat 1, a supporting frame 2 is arranged on one side of the supporting seat 1, a rolled film 3 is arranged on the supporting frame 2, and one end of the rolled film 3 extends and is laid on the supporting seat 1; For details, please refer to Figure 1 A receiving plate 101 is provided on the supporting seat 1, and the width of the receiving plate 101 is greater than the width of the rolled film 3. The rolled film 3 is laid on the receiving plate 101 for cutting by a cutting assembly subsequently provided on the supporting seat 1. In particular, the rolled film 3 is a polyurethane film, which has the characteristics of good elasticity and high lightness. The polyurethane film needs to be rolled up during production, and then cut after a certain length so that the rolled polyurethane film can be divided into suitable sizes.

[0034] Two groups of longitudinal members 4 are arranged on the support seat 1, and a transport assembly is arranged between the two groups of longitudinal members 4. The transport assembly includes a roller group 8 arranged on the longitudinal members 4, and a cutting assembly for cutting the film is arranged between the roller groups 8; The roller group 8 includes a feeding roller 801, and two groups of the feeding rollers 801 are symmetrically arranged along the length direction of the longitudinal member 4. The two groups of the feeding rollers 801 are connected by a linkage belt, and each group of the feeding rollers 801 is provided with an elastic pressing structure; Preferably, see Figure 1 , Figure 2 A driving motor 26 is fixedly installed on any one group of the longitudinal members 4, and a servo motor 27 is fixedly installed on the other group of longitudinal members 4. The servo motor 27 is connected to the cutting assembly and can drive the cutting assembly to continue the film cutting operation. The output shaft of the driving motor 26 is fixedly connected to the feeding roller 801 or coaxially. The driving motor 26 is started. Due to the connection of the linkage belt, the output shaft of the driving motor 26 will drive the feeding roller 801 and continue to rotate in the same direction synchronously away from the supporting frame 2. At the same time, the rotating feeding roller 801 can transport the film placed on the receiving plate 101.

[0035] The elastic material pressing structure is provided with a plurality of groups equidistantly along the axial direction of the feeding roller 801, and each group of the elastic material pressing structure includes a plurality of groups of plug-in cylinders 13 equidistantly provided along the circumferential direction of the feeding roller 801, and a spring 14 is slidably provided in the plug-in cylinder 13, and one end of the spring 14 abuts against the bottom of the plug-in cylinder 13 and the other end abuts against the abutment plate 12 slidably provided in the plug-in cylinder 13; Preferably, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 Each group of the elastic pressing structure is provided with five groups of plug-in tubes 13 equidistantly along the circumferential direction of the feeding roller 801. An abutment plate 12 is elastically and slidably provided in each group of the plug-in tubes 13. A plug-in rod is fixedly provided on the side of the abutment plate 12 facing the axis of the feeding roller 801. The plug-in rod is slidably inserted in the plug-in tube 13. In the initial state, the spring 14 is in a compressed state. The spring 14 in the compressed state can push the abutment plate 12 away from the axis of the feeding roller 801, and the abutment plate 12 facing the receiving plate 101 will be pressed against the receiving plate 101 under the action of the spring 14. Before use, the extended end of the rolled film 3 is laid on the receiving plate 101 and passed through the loading roller 801. At this time, when the loading roller 801 is in a stationary state, the abutment plate 12 facing the receiving plate 101 can press and fix the film on the receiving plate 101. At this time, the film between the two groups of loading rollers 801 is flatly supported under the cutting assembly. When the subsequent cutting assembly cuts the film, the cut incision of the film will not be deformed due to wrinkles in the film.

[0036] For further information, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 The cutting assembly includes a driving rod 6, which is rotatably connected to two groups of supporting members 17 fixedly arranged on the supporting seat 1, and a guide rod 1701 is fixedly arranged between the two groups of supporting members 17, and a movable sleeve 16 slidably connected to the guide rod 1701 is sleeved on the driving rod 6. Under the restriction of the guide rod 1701, the movable sleeve 16 can only slide along the axial direction of the driving rod 6, and a cutting knife 1602 is arranged on the movable sleeve 16, and a protrusion 1601 is formed on the inner wall of the movable sleeve 16, and the protrusion 1601 is slidably arranged in a spiral groove 601 opened on the outer wall of the driving rod 6; Preferably, see Figure 1 , Figure 6 The driving rod 6 is coaxially fixedly connected to the output shaft of the servo motor 27 fixedly arranged on the longitudinal member 4, and the spiral groove 601 is opened clockwise around the outer wall of the driving rod 6 (combined with Figure 6), in particular, the cutting knife 1602 is configured as a circular blade, and the cutting knife 1602 is connected to the movable sleeve 16 via a lifting device 1603, the lifting device 1603 is in communication connection with the sensor 5 provided on the receiving plate 101, the sensor 5 is provided with two groups, and the two groups of sensors 5 are symmetrically arranged along the width direction of the receiving plate 101. In the initial state, the movable sleeve 16 is close to the driving motor 26, the cutting knife 1602 is in contact with the receiving plate 101, and then the servo motor 27 is started, and the output shaft of the servo motor 27 drives the driving rod 6 to rotate counterclockwise, and at this time the spiral The contact and compression between the groove wall of the groove 601 and the protrusion 1601 will force the movable sleeve 16 to move along the guide rod 1701 toward the servo motor 27. At the same time, the cutting knife 1602 in contact with the receiving plate 101 will roll on the receiving plate 101 to cut the polyester film. When the movable sleeve 16 moves to the end of the stroke of the spiral groove 601 close to the servo motor 27, the sensor 5 close to the servo motor 27 detects the position of the movable sleeve 16 and drives the lifting device 1603 to move, thereby forcing the cutting knife 1602 to rise away from the receiving plate 101. Then, the output shaft of the servo motor 27 rotates in the opposite direction, and the driving rod 6 rotates clockwise, forcing the movable sleeve 16 to move along the guide rod 1701 and return to its initial position. After the movable sleeve 16 returns to its initial position, the output shaft of the servo motor 27 stops rotating. After the sensor 5 on the other side detects the position of the movable sleeve 16, it drives the lifting device 1603 to move again, forcing the cutting knife 1602 to descend and return to its initial position, so that the cutting knife 1602 can perform the film cutting operation again.

[0037] The above-mentioned film cutting component can also use a long strip cutting knife 1602 for cutting operations. Specifically, the long strip cutting knife 1602 needs to cooperate with the matching lifting drive. However, during the cutting process, the downward pressing blade will cause the polyurethane film on both sides to shrink, thereby reducing the cutting accuracy of the film. Therefore, in an embodiment of the present invention, a circular cutting knife 1602 is used for cutting operations. When the sharp blade rolls, the film can be cut quickly. During cutting, due to the abutment and pressing of the abutment plates 12 on both sides of the cutting knife 1602, the film will not shift or wrinkle, and the cut end of the film will not be deformed.

[0038] For further information, see Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig. 9, an automatic cutting device, further comprising a pressing assembly, the pressing assembly being arranged on the supporting seat 1, comprising a reciprocating structure and a lifting structure, the lifting structure cooperating with a pressing bar 7 arranged on the supporting seat 1, when the transporting assembly transports the film, the lifting structure can drive the pressing bar 7 to press the film on the left and right sides of the roller group 8, and when the cutting assembly is in motion, the lifting structure can drive the pressing bar 7 to transport the cut film; The reciprocating structure includes a pulley 15 rotatably mounted on the support seat 1, and two groups of pulleys 15 are provided along the length direction of the support seat 1. One group of pulleys 15 away from the roller group 8 is connected to the driving rod 6 through a first linkage structure, and the other group of pulleys 15 is connected to the roller group 8 through a second linkage structure. For details, please refer to Figure 2 The above-mentioned reciprocating structure is provided with two groups, and the two groups of reciprocating structures cooperate with the two groups of feeding rollers 801 respectively. When the feeding rollers 801 rotate, the two groups of reciprocating structures will move synchronously, driving the two groups of pressing strips 7 to move along the length direction of the receiving plate 101, thereby transporting the film laid on the receiving plate 101.

[0039] A belt 11 is disposed between the two groups of pulleys 15, and a protruding column 1101 is formed on the belt 11; It also includes a reciprocating plate 23 slidably disposed on the supporting seat 1, the reciprocating plate 23 is provided with a moving groove on one side facing the belt 11, and the protruding column 1101 is slidably disposed in the moving groove; Preferably, see Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig. 9 A clamping rod 2301 is provided on the side of the reciprocating plate 23 facing the belt 11. Two groups of the clamping rods 2301 are symmetrically arranged along the length direction of the reciprocating plate 23. The two groups of clamping rods 2301 are slidably set in the clamping grooves opened on the supporting seat 1. With the cooperation of the clamping grooves and the clamping rods 2301, the reciprocating plate 23 can only slide along the length direction of the supporting seat 1. During the sliding process, the reciprocating plate 23 can drive the pressing bar 7 to transmit the film with the cooperation of the lifting structure.

[0040] The second linkage structure includes a second sleeve 20 rotatably mounted on the support seat 1, a rotating shaft 24 is inserted into the second sleeve 20, a second pawl 2401 is elastically provided on the rotating shaft 24, the second pawl 2401 cooperates with a ratchet ring formed inside the second sleeve 20, and the rotating shaft 24 is connected to the roller group 8 through the gear group 10 and the linkage belt; See also Figure 4 , Figure 5 The gear set 10 includes a main gear 1002 and a slave gear 1001. The main gear 1002 is rotatably mounted on the support seat 1 and is connected to the feeding roller 801 close to the main gear 1002 through a linkage belt. The slave gear 1001 is coaxially fixedly connected to the rotating shaft 24. Fig.11 The second pawl 2401 is elastically connected to the shaft 24 through the elastic sheet. Under the connection of the elastic sheet, the second pawl 2401 is always kept in an open state. Combined with the arrangement of the ratchet ring inside the second sleeve 20, when the shaft 24 rotates counterclockwise, the second pawl 2401 can cooperate with the ratchet ring to drive the second sleeve 20 and the shaft 24 to rotate counterclockwise synchronously, corresponding to Figure 5 At this time, the rotating second sleeve 20 will drive the pulley 15 to rotate counterclockwise under the connection of the linkage belt; When the pulley 15 rotates counterclockwise, the protruding column 1101 that rotates synchronously with the belt 11 will come into contact and squeeze with the wall of the movable groove, thereby driving the reciprocating plate 23 to slide along the length direction of the supporting seat 1. The sliding process of the reciprocating plate 23 can transport the film on the receiving plate 101. Further, referring to the figure, the first linkage structure includes a first sleeve tube 19 rotatably mounted on the support seat 1, the first sleeve tube 19 is connected to the second sleeve tube 20 through a linkage belt, and a linkage rod 18 is inserted into the first sleeve tube 19, the linkage rod 18 is connected to the driving rod 6 through a linkage belt, and a first pawl 1801 is elastically provided on the linkage rod 18, and the first pawl 1801 cooperates with a ratchet ring formed on the inner wall of the first sleeve tube 19; Specifically, the first pawl 1801 is also elastically connected to the linkage rod 18 through an elastic sheet. Under the connection of the elastic sheet, the first pawl 1801 is always kept in an open state, and the first pawl 1801 is set in opposite directions to the second pawl 2401 (such as Fig.10 As shown in the figure), when the linkage rod 18 rotates clockwise, the first ratchet 1801 will drive the first sleeve tube 19 to rotate clockwise synchronously under the action of the elastic sheet. At this time, the rotating first sleeve tube 19 can drive the second sleeve tube 20 to rotate clockwise. When the second sleeve tube 20 rotates, the ratchet ring on the inner wall of the second sleeve tube 20 forces the second ratchet 2401 to deflect toward the axis of the rotating shaft 24, so the rotating shaft 24 remains stable and motionless; similarly, when the first sleeve tube 19 is rotated clockwise by the second sleeve tube 20, the ratchet ring on the inner wall of the first sleeve tube 19 forces the first ratchet 1801 to deflect toward the axis of the linkage rod 18, so the linkage rod 18 remains stable and motionless; In summary, in the initial state, please refer to Figure 1 , the above two groups of pressing strips 7 are close to the feeding roller 801 and fit with the receiving plate 101. At this time, the pressing strip 7 close to the supporting frame 2 can press the end connected to the rolled film 3, so as to prevent the rolled film 3 from pulling the film laid on the receiving plate 101. Then, the servo motor 27 is started, and the output shaft of the servo motor 27 drives the driving rod 6 to rotate counterclockwise, thereby forcing the moving sleeve 16 to drive the cutting knife 1602 to cut the film. When the cutting knife 1602 is cutting, due to the pressing effect of the pressing strip 7, the incision cut by the cutting knife 1602 is smoother and flatter; After the film cutting is completed, the cutting blade 1602 is separated from the receiving plate 101 under the control of the sensor 5, and then the servo motor 27 rotating in the reverse direction can drive the cutting blade 1602 to move in the reverse direction until it returns to the initial position; When the cutting knife 1602 moves in the opposite direction and returns to the initial position, the sensor 5 will simultaneously drive the driving motor 26 to move. At this time, the driving motor 26 will drive the feeding roller 801 to rotate clockwise. When the feeding roller 801 rotates clockwise, it can drive the main gear 1002 to rotate clockwise. Then, under the connection of the gear set 10, the main gear 1002 can drive the slave gear 1001 and the rotating shaft 24 to rotate counterclockwise. At this time, the rotating rotating shaft 24 will drive the second sleeve 20 to rotate counterclockwise, and then the belt 11 will drive the reciprocating plate 23 to move. For details, please refer to Figure 1 , Figure 2 At this time, the pressing strip 7 away from the support frame 2 will slide along the length direction of the receiving plate 101 with the cooperation of the lifting structure. During the sliding, the pressing strip 7 will cooperate with the feeding roller 801 to push the cut film to the inclined receiving plate (not shown in the figure) provided on the other side of the support seat 1; and the pressing strip 7 close to the support frame 2 will also move toward the support frame 2 with the cooperation of another set of lifting structures. During the movement, the lifting structure will simultaneously drive the pressing strip 7 to separate from the receiving plate 101 until the reciprocating plate 23 moves to the end of the stroke, and the pressing strip 7 is re-combined with the receiving plate 101; As the driving motor 26 continues to operate, the continuous casting pressing strips 7 will simultaneously move toward the feeding roller 801. At this time, the pressing strips 7 close to the support frame 2 will cooperate with the feeding roller 801 to transport the rolled film 3 toward the receiving plate; and the pressing strips 7 close to the receiving plate will simultaneously separate from the receiving plate 101 under the cooperation of the lifting structure, until they return to the initial position, and the two groups of pressing strips 7 will restore their initial positions; At the same time, the movable sleeve 16 returns to the initial position, and the sensor 5 detects the position of the movable sleeve 16 again, and then drives the servo motor 27 to stop and start the servo motor 27, and continues to repeat the above process to continuously cut the film.

[0041] To elaborate, the lifting action of the pressing bar 7 can be driven by a cylinder, but when using the cylinder as a lifting drive, in order to make the cylinder work normally, it is necessary to configure a variety of accessories, such as air source filters, oil mist collectors, cylinder regulators, etc. These multi-accessories are driven in a way that is not convenient for practical application. The cylinder is large in size. Cylinders of large size and volume will cause difficulties in installation and storage when used. To address the disadvantage of large size, the cylinder can be replaced by a hydraulic cylinder, but the working principle of the hydraulic cylinder is complicated: the hydraulic cylinder works based on the hydraulic oil medium, involving multiple elements such as oil circuits, valves, hydraulic pumps, etc., and is difficult to design and maintain. Once the hydraulic cylinder fails, it needs to be repaired by special maintenance tools and technologies, and the maintenance cost is high, which is also not conducive to practical application.

[0042] In the embodiment of the present invention, the lifting structure works in a mechanical cooperation manner, has a small size, a simple working principle, and when a failure occurs, the maintenance cost is relatively low.

[0043] For details, please refer to Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.13 The lifting structure includes a guide member and a lifting member, the guide member includes a guide plate 9 fixedly arranged on the supporting seat 1, and an engaging groove is provided at one end of the guide plate 9 away from the belt 11, and the engaging groove includes a horizontal groove 901, an ascending groove 902 and a descending groove 903, and a deflection plate 22 is provided between the horizontal groove 901 and the descending groove 903, and the deflection plate 22 is connected to the guide plate 9 through a spring sheet 25; The lifting member includes a sliding member 21 fixedly connected to the pressing bar 7, the sliding member 21 is slidably arranged in a sliding groove 2302 opened on the reciprocating plate 23, and a sliding rod 2101 is formed on the sliding member 21, and the sliding rod 2101 is slidably arranged in the fitting groove; It should be supplemented that a deflection plate 22 is provided between the descending groove 903 and the horizontal groove 901, and the deflection plate 22 is connected to the guide plate 9 through a spring sheet 25. In the initial state, the lower end of the deflection plate 22 is in contact with the groove wall of the horizontal groove 901, and the slide bar 2101 close to the support frame 2 is located at the connection between the descending groove 903 and the horizontal groove 901, and the other set of slide bars 2101 is located at the connection between the ascending groove 902 and the horizontal groove 901. In combination with the above, when the film cutting is completed, the two sets of pressing strips 7 will move away from each other under the cooperation of the feeding roller 801 and the second linkage structure; During this process, the slide bar 2101 close to the support bracket 2 will move along the descending groove 903. At this time, the sliding member 21 will drive the pressing strip 7 to rise and separate from the receiving plate 101. When the slide bar 2101 moves to the connection between the descending groove 903 and the ascending groove 902, the rising height of the pressing strip 7 is the maximum. Then the slide bar 2101 will slide along the ascending groove 902. At this time, the sliding member 21 will drive the pressing strip 7 to descend and make the pressing strip 7 slowly fit with the receiving plate 101. When the slide bar 2101 moves to the connection between the ascending groove 902 and the horizontal groove 901, the pressing strip 7 will be lifted up and the receiving plate 101 will be lifted up. When the pressing strips 7 are connected, they are completely fitted with the receiving plate 101. At the same time, the other group of pressing strips 7 will first move along the horizontal groove 901. During the movement, the slide bar 2101 can force the deflection plate 22 to deflect until the spring piece 25 is elastically deformed. When the slide bar 2101 moves to the connection between the horizontal groove 901 and the descending groove 903, the spring piece 25 releases elastic potential energy and drives the deflection plate 22 to deflect back to the initial position. Subsequently, the two groups of pressing strips 7 will move closer to each other under the cooperation of the feeding roller 801 and the second linkage structure. In this process, the pressing strip 7 close to the support frame 2 will repeat the movement process of the pressing strip 7 away from the support frame 2, and similarly, the pressing strip 7 away from the support frame 2 will repeat the movement process close to the support frame 2. Finally, the two groups of pressing strips 7 return to their initial positions, so that the subsequent cutting knife 1602 can perform continuous film cutting operations. During the whole process, the mutual cooperation and constraints between the mechanical structures can be used to continuously cut and segment the rolled film 3. Compared with the ordinary method of cutting directly from top to bottom, it can avoid wrinkles on the polyurethane film during cutting. At the same time, with the cooperation of the pressing strip 7 and the abutment plate 12, it can avoid the polyurethane film shrinking to the middle during cutting, resulting in reduced cutting accuracy.

[0044] A polyurethane film cutting method based on a pressing function is also proposed, using the automatic cutting device as described above, comprising the following steps: Step 1: Before use, extend one end of the rolled film 3 to the support seat 1 and pass through the roller group 8. At this time, the cutting knife 1602 is in contact with the support seat 1, and the pressing strip 7 is in contact with the support seat 1. Then, the driving rod 6 is driven to rotate. The rotating driving rod 6 drives the cutting knife 1602 to move a travel distance, thereby cutting the film. Step 2: After the cutting is completed, the driving rod 6 reverses, drives the cutting knife 1602 back to the initial position and then stops rotating. In this process, the driving rod 6 drives the reciprocating structure to move with the cooperation of the first linkage structure. At this time, the pressing strip 7 away from the support frame 2 drives the cut film to gradually move away from the roller group 8 with the cooperation of the lifting structure, while the pressing strip 7 close to the support frame 2 moves toward the support frame 2, and at the same time, with the cooperation of the lifting structure, the film close to the support frame 2 is pressed; Step 3: After the cutting blade 1602 returns to the initial position, the roller group 8 starts to rotate, and with the cooperation of the second linkage structure, the reciprocating structure continues to move, driving the two groups of pressing strips 7 to move toward the roller group 8. At this time, the pressing strips 7 close to the support frame 2 will convey the film, and the pressing strips 7 far away from the support frame 2 will gradually approach the roller group 8 with the cooperation of the lifting structure, and press the film transmitted through the roller group 8; Step 4: Repeat the above steps 1, 2, and 3 to complete the continuous cutting of the film.

[0045] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic cutting device, comprising a supporting seat, a supporting frame is arranged on one side of the supporting seat, a rolled film is arranged on the supporting frame, and one end of the rolled film extends and is laid on the supporting seat; Features: Two groups of longitudinal members are arranged on the support seat, a transport assembly is arranged between the two groups of longitudinal members, the transport assembly includes a roller group arranged on the longitudinal members, and a cutting assembly for cutting the film is arranged between the roller groups; A pressing assembly is arranged on the supporting seat, and includes a reciprocating structure and a lifting structure. The lifting structure cooperates with a pressing bar arranged on the supporting seat. When the transport assembly transports the film, the lifting structure can drive the pressing bar to press the film on the left and right sides of the roller group, and when the cutting assembly is in action, the lifting structure can drive the pressing bar to transport the cut film.

2. An automatic cutting device according to claim 1, It is characterized in that The roller group includes feeding rollers, and two groups of feeding rollers are symmetrically arranged along the length direction of the longitudinal member. The two groups of feeding rollers are connected by a linkage belt, and each group of feeding rollers is provided with an elastic pressing structure.

3. An automatic cutting device according to claim 2, It is characterized in that The elastic pressing structure is arranged in multiple groups equidistantly along the axial direction of the feeding roller, and each group of the elastic pressing structure includes multiple groups of plug-in cylinders equidistantly arranged along the circumferential direction of the feeding roller. A spring is slidably arranged in the plug-in cylinder, and one end of the spring abuts against the bottom of the plug-in cylinder and the other end abuts against an abutment plate slidably arranged in the plug-in cylinder.

4. The automatic cutting device according to claim 1, It is characterized in that The cutting assembly includes a driving rod, which is rotatably connected to two groups of support members fixedly arranged on the supporting seat, a guide rod is fixedly arranged between the two groups of support members, and a movable sleeve slidably connected to the guide rod is sleeved on the driving rod, a cutting knife is arranged on the movable sleeve, and a protrusion is formed on the inner wall of the movable sleeve, and the protrusion is slidably arranged in a spiral groove opened on the outer wall of the driving rod.

5. An automatic cutting device according to claim 4, It is characterized in that The reciprocating structure includes a pulley rotatably mounted on the supporting seat, and two groups of pulleys are arranged along the length direction of the supporting seat, one group of pulleys away from the roller group is connected to the driving rod through a first linkage structure, and the other group of pulleys is connected to the roller group through a second linkage structure; A belt is arranged between the two groups of pulleys, and a protrusion is formed on the belt; It also includes a reciprocating plate slidably arranged on the supporting seat, wherein a moving groove is provided on a side of the reciprocating plate facing the belt, and the protruding column is slidably arranged in the moving groove.

6. An automatic cutting device according to claim 5, It is characterized in that The second linkage structure includes a second sleeve tube rotatably mounted on the supporting seat, a rotating shaft is inserted in the second sleeve tube, a second pawl is elastically arranged on the rotating shaft, the second pawl cooperates with a ratchet ring formed inside the second sleeve tube, and the rotating shaft is connected to the roller group through a gear set and a linkage belt.

7. An automatic cutting device according to claim 6, It is characterized in that The first linkage structure includes a first sleeve tube rotatably mounted on the supporting seat, the first sleeve tube is connected to the second sleeve tube through a linkage belt, and a linkage rod is inserted into the first sleeve tube, the linkage rod is connected to the driving rod through a linkage belt, and a first pawl is elastically arranged on the linkage rod, and the first pawl cooperates with a ratchet ring formed on the inner wall of the first sleeve tube.

8. The automatic cutting device according to claim 5, It is characterized in that The lifting structure includes a guide member and a lifting member, the guide member includes a guide plate fixedly arranged on the supporting seat, an engaging groove is opened at the end of the guide plate away from the belt, the engaging groove includes a horizontal groove, an ascending groove and a descending groove, and a deflection plate is arranged between the horizontal groove and the descending groove, and the deflection plate is connected to the guide plate through a spring sheet.

9. An automatic cutting device according to claim 8, It is characterized in that The lifting member includes a sliding member fixedly connected to the pressing strip, the sliding member is slidably arranged in a sliding groove provided on the reciprocating plate, and a sliding rod is formed on the sliding member, and the sliding rod is slidably arranged in the fitting groove.

10. A polyurethane film cutting method based on a pressing function, using the automatic cutting device according to claim 1. It is characterized in that The steps include: Step 1: Before use, extend one end of the rolled film to the support seat and pass through the roller group. At this time, the cutting knife is in contact with the support seat, and the pressing strip is in contact with the support seat. Then the driving rod is driven to rotate. The rotating driving rod will drive the cutting knife to move a stroke distance, thereby cutting the film; Step 2: After the cutting is completed, the driving rod reverses, drives the cutting knife back to the initial position and then stops rotating. During this process, the driving rod drives the reciprocating structure to move with the cooperation of the first linkage structure. At this time, the pressing bar away from the support frame will drive the cut film to gradually move away from the roller group with the cooperation of the lifting structure, while the pressing bar close to the support frame will move toward the support frame, and at the same time, with the cooperation of the lifting structure, the film close to the support frame will be pressed; Step 3: After the cutting blade returns to the initial position, the roller group starts to rotate, and with the cooperation of the second linkage structure, the reciprocating structure continues to move, driving the two groups of pressing bars to move toward the roller group. At this time, the pressing bars close to the support frame will transport the film, and the pressing bars far away from the support frame will gradually approach the roller group with the cooperation of the lifting structure, and press the film transmitted through the roller group; Step 4: Repeat the above steps 1, 2, and 3 to complete the continuous cutting of the film.

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