Stretching device for polytetrafluoroethylene fiber processing

Abstract

The present application relates to the field of polytetrafluoroethylene fiber stretching, and particularly relates to a stretching device for polytetrafluoroethylene fiber processing, which comprises a mounting frame, a heating unit is uniformly arranged on one side of the mounting frame along the transverse direction, and a plurality of second heating rollers are uniformly arranged on one side of the mounting frame along the transverse direction and are rotationally arranged, the extrusion stretching of the polytetrafluoroethylene fiber is realized through the extrusion unit arranged in the present application, so that the generation of micropores is promoted, and when the polytetrafluoroethylene fiber prepared by different components is stretched, the height adjusting unit cooperates with the second pushing mechanism to simultaneously adjust the limiting pushing mechanisms on both sides, so that the extrusion rollers and the second heating rollers on both sides are synchronously adjusted, the second pushing mechanism can synchronously adjust the spacing of the extrusion rollers of the extrusion units on both sides at one time, so that the spacing of the extrusion rollers and the second heating rollers can be adjusted, and meanwhile, the spacing deviation between the adjusted extrusion rollers is ensured.

Description

Technical Field

[0001] This invention relates to the field of polytetrafluoroethylene fiber stretching technology, and more particularly to a stretching apparatus for processing polytetrafluoroethylene fibers. Background Technology

[0002] Polytetrafluoroethylene (PTFE) fiber is a high-molecular polymer fiber made from polytetrafluoroethylene through spinning or film production followed by cutting or fibrillation. It possesses excellent chemical stability and corrosion resistance, enabling its use in extreme environments.

[0003] Polytetrafluoroethylene (PTFE) fiber stretching is a process that uses mechanical force to deform the fiber along its length, thereby altering its physical and chemical properties. During PTFE fiber stretching, it is often difficult to effectively control the intensity of the mechanical force. Furthermore, most equipment uses a fixed stretching force that cannot be changed. When other materials are added to some PTFE fibers, the raw material ratio changes. If the stretching force cannot be altered, the stretched PTFE fibers cannot meet production standards. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a stretching device for processing polytetrafluoroethylene fibers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stretching device for processing polytetrafluoroethylene fibers includes a mounting frame. Heating units are uniformly arranged laterally on one side of the mounting frame. Multiple second heating rollers are rotatably arranged laterally on one side of the mounting frame located on the heating units. Guide roller frames are symmetrically arranged on both sides of each second heating roller.

[0007] An extrusion unit is provided at the bottom of the second heating roller adjacent to the heating unit, and an extrusion unit is provided at the top of the second heating roller away from the heating unit and located at the other end of the mounting frame. The two adjacent extrusion units are arranged in a mirror image, and extrusion unit support frames are symmetrically installed on both sides of the extrusion unit away from the heating unit. The extrusion unit support frames are installed on the mounting frame.

[0008] The extrusion unit includes an extrusion unit mounting frame, on which sliding mechanisms are symmetrically mounted. Each sliding mechanism has an extrusion roller rotating seat slidably mounted on it. An extrusion roller is rotatably mounted between the extrusion roller rotating seats located opposite each other on both sides of the second heating roller. The extrusion rollers are symmetrically arranged on both sides of the second heating roller. A limiting push mechanism for restricting the movement of the extrusion roller rotating seats is vertically slidably mounted on the extrusion unit mounting frame. A height adjustment unit is provided between each of the adjacent limiting push mechanisms on both sides. A second push mechanism is connected to one side of the height adjustment unit.

[0009] Furthermore, in a preferred configuration, the heating unit includes a pressing roller adjustment mechanism symmetrically arranged on both sides of the mounting frame. A first heating roller for preheating polytetrafluoroethylene is rotatably arranged between the two pressing roller adjustment mechanisms. A pressing roller is movably arranged above each of the first heating rollers. The two ends of the pressing rollers are rotatably fitted onto the two pressing roller adjustment mechanisms. A drive motor located at the bottom of the heating unit and used to drive the first heating roller to rotate is symmetrically arranged on the mounting frame. The drive motor drives the first heating roller to rotate through chain transmission. A linkage frame is rotatably connected to the top of the pressing roller adjustment mechanisms on one side.

[0010] Furthermore, in a preferred configuration, the pressing roller adjusting mechanism includes a rotating frame symmetrically mounted on both sides of the first heating roller. A first pushing mechanism is provided on one side of the rotating frame. A first heating roller rotating seat for mounting the first heating roller is provided at the bottom of the rotating frame. A pressing roller mounting rotating frame is rotatably mounted at the bottom of the rotating frame. The pressing roller is rotatably fitted on the two pressing roller mounting rotating frames on both sides. The other end of the pressing roller mounting rotating frame away from the rotating frame is rotatably connected to the first pushing mechanism.

[0011] The first pushing mechanism includes a first rotating base, on which a first servo electric cylinder is rotatably mounted. A rotary connector is rotatably connected to the piston rod end of the top output end of the first servo electric cylinder. The rotary connector is rotatably engaged at the other end of the pressing roller mounting rotating frame away from the rotating frame. A linkage frame is rotatably connected to the top of one side of the pressing roller mounting rotating frame.

[0012] In addition, a preferred structure is that the linkage frame includes an upper connecting plate, with connecting side plates symmetrically installed at the bottom of the upper connecting plate, and a first rotating roller is rotatably arranged at the ends of both sides of the connecting side plates. The first rotating roller is rotatably engaged with the ends of the rotating frame on the other side away from the rotating frame where the pressing rollers are installed.

[0013] Furthermore, in a preferred configuration, a drive mechanism for driving the second heating roller to rotate is provided at one end of the second heating roller, the drive mechanism is mounted on a mounting frame, and a heating roller rotating frame is provided at the other end of the second heating roller away from the drive mechanism, the second heating roller is rotatably fitted on the heating roller rotating frame at one end of the second heating roller, the heating roller rotating frame is mounted on the mounting frame, and the extrusion unit mounting frame is symmetrically arranged between the heating roller rotating frame and the drive mechanism.

[0014] Furthermore, in a preferred configuration, the extrusion unit mounting frame includes a support base, on which a slide rail mounting plate is provided. Sliding mechanisms are symmetrically installed on the upper two side walls of the slide rail mounting plate. Multiple mounting holes for installing the sliding mechanisms are evenly opened on the surface of the upper two side walls of the slide rail mounting plate. A slide rod is vertically and symmetrically arranged on one side of the slide rail mounting plate on the support base. A limiting and pushing mechanism is slidably engaged on the slide rod. A limiting stop block is provided at the top of each slide rod to restrict the movement of the limiting and pushing mechanism.

[0015] The sliding mechanism includes a slide rail, which is symmetrically installed on the surface of the side wall above the slide rail mounting plate. Each slide rail is slidably fitted with a sliding base, and each sliding base is equipped with a rotating seat for the extrusion roller.

[0016] Furthermore, in a preferred configuration, the limiting and pushing mechanism includes a limiting block, on which a limiting groove is laterally opened to restrict the movement of the extrusion roller rotating seat. Sliding blocks for sliding cooperation on the sliding rod are symmetrically arranged on both sides of the limiting block. A mounting protrusion is fixedly connected to the bottom of one side wall of the limiting block, and a rotating connector for rotatably connecting the height adjustment unit is provided on the mounting protrusion.

[0017] Furthermore, in a preferred configuration, the extrusion roller rotating seat includes a bearing rotating seat, the extrusion roller is rotatably fitted on the bearing rotating seats on both sides, and single-rod bearing mounting plates are symmetrically fixedly connected to both sides of the bearing rotating seat on the side surface away from the extrusion roller, and a single-rod bearing mounting bracket is installed at the single-rod bearing mounting plate. The bottom of the bearing rotating seat is symmetrically provided with mounting base plates for mounting on the sliding base.

[0018] The single-rod bearing is rotatably mounted on the middle of the surface of the single-rod bearing mounting frame away from the bearing rotating seat, and the single-rod bearing is movably mounted at the limiting slide groove.

[0019] Furthermore, in a preferred configuration, the height adjustment unit includes an adjustment arm mounting bracket, which is mounted on the upper surface of the mounting frame and located between the two extrusion units. The adjustment arm mounting bracket includes a support column, which is vertically mounted on the upper surface of the mounting frame. A bearing mounting head is provided at the top of the support column, and an adjustment arm is rotatably mounted on the bearing mounting head.

[0020] The middle part of the adjusting arm is provided with a rotating rod mounting seat for rotating and mounting on the bearing mounting head. Connecting heads are fixedly connected to both ends of the adjusting arm. A second rotating roller is rotatably mounted on each connecting head. Rotating connecting rods are rotatably fitted to the second rotating rollers on both sides. The other end of the rotating connecting rod away from the second rotating roller is rotatably connected to the rotating connecting head of the extrusion unit on both sides. A second pushing mechanism connecting plate for connecting the second pushing mechanism is provided on the bottom surface of the adjusting arm near the highest end of the arm body.

[0021] Furthermore, in a preferred configuration, the second pushing mechanism includes a pushing mechanism mounting base, which is mounted on the upper surface of the mounting frame on one side of the support column. A second rotating base is provided on the upper surface of the pushing mechanism mounting base, and a second servo electric cylinder is rotatably connected to the second rotating base. A piston rod is mounted on the top output end of the second servo electric cylinder, and a rotating seat connector is provided at the top end of the piston rod of the second servo electric cylinder. A rotating seat is symmetrically rotatably fitted on the rotating seat connector, and the rotating seat is mounted on the connecting plate of the second pushing mechanism.

[0022] The beneficial effects of this invention are as follows: In this invention, the extrusion unit is used to extrude and stretch polytetrafluoroethylene (PTFE) fibers, thereby promoting the formation of micropores. Furthermore, when stretching PTFE fibers prepared from different components, the height adjustment unit, in conjunction with the second pushing mechanism, can simultaneously adjust the limiting pushing mechanisms on both sides, thereby synchronously adjusting the extrusion rollers and the second heating roller on both sides. This allows the second pushing mechanism to simultaneously adjust the spacing between the extrusion rollers of the extrusion units on both sides at one time, making the spacing between the extrusion rollers and the second heating roller adjustable, while ensuring that there is no deviation in the spacing between the adjusted extrusion rollers. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 b is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 Here is a schematic diagram A of the heating unit;

[0026] Figure 4 Here is a schematic diagram (B) of the heating unit.

[0027] Figure 5 This is a schematic diagram of the disassembled linkage frame and pressing roller adjustment mechanism;

[0028] Figure 6 This is a structural schematic diagram of the linkage frame;

[0029] Figure 7 This is a schematic diagram of the pressing roller adjustment mechanism;

[0030] Figure 8 This is a schematic diagram of the extrusion unit and the second heating roller;

[0031] Figure 9 This is a schematic diagram of the structure of the second heating roller;

[0032] Figure 10 This is a schematic diagram of the extrusion unit.

[0033] Figure 11 This is a partially enlarged structural diagram of the extrusion unit;

[0034] Figure 12 This is a schematic diagram of the structure after the sliding mechanism and the extrusion unit mounting bracket have been separated.

[0035] Figure 13 This is a schematic diagram of the disassembled sliding mechanism;

[0036] Figure 14 This is a schematic diagram of the disassembled structure of the extrusion roller rotating seat;

[0037] Figure 15 Schematic diagram c shows the structure of the extrusion unit mounting bracket;

[0038] Figure 16 d is a structural schematic diagram of the extrusion unit mounting bracket;

[0039] Figure 17 This is a structural diagram of the limit actuator;

[0040] Figure 18 This is a schematic diagram of the structure when the height adjustment unit is connected to the two side limit push mechanisms;

[0041] Figure 19 This is a schematic diagram of the height adjustment unit.

[0042] Figure 20 This is a schematic diagram of the structure after the height adjustment unit has been disassembled;

[0043] Figure 21 This is a magnified schematic diagram of a portion of the adjusting arm.

[0044] Figure 22 This is a schematic diagram of the first propulsion mechanism.

[0045] In the diagram: 01, Heating unit; 011, Drive motor; 012, First heating roller; 013, Pressing roller; 02, Guide roller frame; 03, Second heating roller; 031, Drive mechanism; 032, Heating roller rotating frame; 04, Extrusion unit; 05, Extrusion unit support frame; 06, Extrusion roller; 1, Mounting frame; 2, Pressing roller adjusting mechanism; 21, Rotating frame; 211, Pressing roller mounting rotating frame; 212, Heating roller rotating seat; 22, First pushing mechanism; 221, First servo electric cylinder; 222, First rotating base; 223, Rotary connector; 3, Linkage frame; 31, Connecting side plate; 32, Upper connecting plate; 33, First rotating roller; 4, Height adjustment unit; 41, Adjusting arm mounting frame; 411, Bearing mounting head; 412, Support column; 42, Adjusting arm; 421, Rotating... 422. Rod mounting base; 423. Second push mechanism connecting plate; 424. Connector; 425. Second rotating roller; 43. Rotating connecting rod; 5. Second push mechanism; 51. Push mechanism mounting base; 52. Second rotating base; 53. Second servo cylinder; 54. Rotating seat connector; 55. Rotating seat; 6. Extrusion unit mounting frame; 61. Support base; 62. Slide rail mounting plate; 63. Slide rod; 64. Limiting block; 7. Limiting push mechanism; 71. Limiting block; 711. Limiting slide groove; 72. Mounting protrusion; 73. Rotating connector; 74. Slider; 8. Sliding mechanism; 81. Slide rail; 82. Sliding base; 9. Extrusion roller rotating seat; 91. Bearing rotating seat; 911. Single rod bearing mounting plate; 912. Mounting base plate; 92. Single rod bearing mounting bracket; 93. Single rod bearing. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0047] Reference Figure 1-22A stretching device for processing polytetrafluoroethylene (PTFE) fibers includes a mounting frame 1. Heating units 01 are uniformly arranged laterally on one side of the mounting frame 1. Multiple second heating rollers 03 are rotatably arranged laterally on one side of the heating units 01 on the mounting frame 1. Guide roller frames 02 are symmetrically arranged on both sides of each second heating roller 03. An extrusion unit 04 is arranged at the bottom of the second heating roller 03 adjacent to the heating unit 01. An extrusion unit 04 is arranged at the top of the second heating roller 03 away from the heating unit 01 and located at the other end of the mounting frame 1. Two adjacent extrusion units 04 are arranged in a mirror image. Extrusion unit support frames 05 are symmetrically installed on both sides of the extrusion unit 04 away from the heating unit 01. The extrusion unit support frames 05 are installed on the mounting frame 1. The extrusion unit 04 is used to extrude PTFE fibers, thereby increasing their stretching area. The extrusion unit 04 can be adjusted to change the distance between the extrusion roller 06 and the second heating roller 03.

[0048] Furthermore, the extrusion unit 04 includes an extrusion unit mounting frame 6, on which sliding mechanisms 8 are symmetrically mounted. Each sliding mechanism 8 is slidably mounted with an extrusion roller rotating seat 9. An extrusion roller 06 is rotatably mounted between the extrusion roller rotating seats 9 located opposite each other on both sides of the second heating roller 03. The extrusion rollers 06 are symmetrically arranged on both sides of the second heating roller 03. A limiting push mechanism 7 for restricting the movement of the extrusion roller rotating seat 9 is vertically slidably mounted on the extrusion unit mounting frame 6. A height adjustment unit 4 is provided between each of the adjacent limiting push mechanisms 7 on both sides. A second push mechanism 5 is connected to one side of the height adjustment unit 4. The height adjustment unit 4, in conjunction with the second push mechanism 5, can adjust the extrusion units 04 on both sides at one time.

[0049] Furthermore, the heating unit 01 includes a pressing roller adjustment mechanism 2, which is symmetrically arranged on both sides of the mounting frame 1. A first heating roller 012 for preheating polytetrafluoroethylene is rotatably arranged between the two pressing roller adjustment mechanisms 2. A pressing roller 013 is movably arranged above the first heating roller 012. The two ends of the pressing roller 013 are respectively rotatably engaged with the two pressing roller adjustment mechanisms 2. A drive motor 011 is symmetrically arranged on the mounting frame 1 at the bottom of the heating unit 01 and is used to drive the first heating roller 012 to rotate. The drive motor 011 drives the first heating roller 012 to rotate through chain transmission. A linkage frame 3 is rotatably connected to the top of one pressing roller adjustment mechanism 2. The first heating roller 012 is used to preheat the polytetrafluoroethylene fiber so that the temperature of the polytetrafluoroethylene fiber can rise, thereby facilitating subsequent stretching. The surface temperature of the first heating roller 012 is maintained at 180℃-200℃, and the surface linear velocity of the first heating roller 012 is 8m-10m / min.

[0050] Meanwhile, the pressing roller adjustment mechanism 2 includes a rotating frame 21, which is symmetrically installed on both sides of the first heating roller 012. A first pushing mechanism 22 is provided on one side of the rotating frame 21. A first heating roller rotating seat 212 for mounting the first heating roller 012 is provided at the bottom of the rotating frame 21. A pressing roller mounting rotating frame 211 is rotatably provided at the bottom of the rotating frame 21. The pressing roller 013 is rotatably engaged on the pressing roller mounting rotating frames 211 on both sides. The other end of the pressing roller mounting rotating frame 211 away from the rotating frame 21 is rotatably connected to the first pushing mechanism 22. 2 includes a first rotating base 222, on which a first servo electric cylinder 221 is rotatably mounted. A rotating connector 223 is rotatably connected to the piston rod end of the top output end of the first servo electric cylinder 221. The rotating connector 223 is rotatably engaged at the other end of the pressing roller mounting rotating frame 211 away from the rotating frame 21. A linkage frame 3 is rotatably connected to the top of one side of the pressing roller mounting rotating frame 211. The first pushing mechanism 22 is used to realize the combined force of the pressing roller 013 and the first heating roller 012 to adhere the polytetrafluoroethylene fiber, thereby ensuring more comprehensive heating.

[0051] Meanwhile, the linkage frame 3 includes an upper connecting plate 32, with connecting side plates 31 symmetrically installed at the bottom of the upper connecting plate 32. A first rotating roller 33 is rotatably installed at the ends of both sides of the connecting side plates 31. The first rotating roller 33 is rotatably engaged at the other end of the pressing roller mounting rotating frame 211 on both sides away from the rotating frame 21. The linkage frame 3 is used to realize that a first pushing mechanism 22 can simultaneously drive the adjacent pressing roller mounting rotating frames 211 on both sides to move.

[0052] In addition, a drive mechanism 031 for driving the second heating roller 03 to rotate is provided at one end of the second heating roller 03. The drive mechanism 031 is mounted on the mounting frame 1. A heating roller rotating frame 032 is provided at the other end of the second heating roller 03 away from the drive mechanism 031. The end of the second heating roller 03 is rotatably fitted onto the heating roller rotating frame 032. The heating roller rotating frame 032 is mounted on the mounting frame 1. The extrusion unit mounting frame 6 is symmetrically arranged between the heating roller rotating frame 032 and the drive mechanism 031. The drive mechanism 031 is composed of a motor and other equipment, and is used to drive the second heating roller 03 to rotate and transport the polytetrafluoroethylene fiber. The surface temperature of the second heating roller 03 is maintained between 150℃ and 170℃, and the surface linear velocity of the first heating roller 012 is 8m to 10m / min.

[0053] The extrusion unit mounting frame 6 includes a support base 61, on which a slide rail mounting plate 62 is provided. Sliding mechanisms 8 are symmetrically installed on the upper two side walls of the slide rail mounting plate 62. Multiple mounting holes for installing the sliding mechanisms 8 are evenly opened on the upper two side wall surfaces of the slide rail mounting plate 62. A slide rod 63 is vertically and symmetrically arranged on one side of the slide rail mounting plate 62 on the support base 61. A limiting push mechanism 7 is slidably engaged on the slide rod 63. A limiting block 64 is provided at the top of each slide rod 63 to limit the movement of the limiting push mechanism 7 and prevent the limiting push mechanism 7 from disengaging.

[0054] Furthermore, the sliding mechanism 8 includes a slide rail 81, which is symmetrically installed on the surface of the side walls above the slide rail mounting plate 62. Each slide rail 81 is slidably fitted with a sliding base 82, and each sliding base 82 is equipped with a pressing roller rotating seat 9. The slide rail 81 ensures that the pressing roller rotating seat 9 moves in a straight line.

[0055] Meanwhile, the limiting and pushing mechanism 7 includes a limiting block 71. A limiting groove 711 is provided transversely on the limiting block 71 to restrict the movement of the extrusion roller rotating seat 9. Sliding blocks 74 for sliding cooperation on the sliding rod 63 are symmetrically arranged on both sides of the limiting block 71. A mounting protrusion 72 is fixedly connected to the bottom of one side wall of the limiting block 71. A rotating connector 73 for rotating connection of the height adjustment unit 4 is provided on the mounting protrusion 72. The limiting block 71 is used to ensure that the extrusion roller rotating seats 9 on both sides can move synchronously.

[0056] Furthermore, the extrusion roller rotating seat 9 includes a bearing rotating seat 91, and the extrusion roller 06 is rotatably fitted on the bearing rotating seats 91 on both sides. On the side surface of the bearing rotating seat 91 away from the extrusion roller 06, single rod bearing mounting plates 911 are symmetrically fixedly connected on both sides. A single rod bearing mounting bracket 92 is installed at the single rod bearing mounting plate 911. A mounting base plate 912 for mounting on the sliding base 82 is symmetrically arranged at the bottom of the bearing rotating seat 91. A single rod bearing 93 is rotatably arranged in the middle of the side surface of the single rod bearing mounting bracket 92 away from the bearing rotating seat 91. The single rod bearing 93 is movably arranged in the limiting slide groove 711. The single rod bearing 93 is used to drive the extrusion roller 06 to move. When stretching polytetrafluoroethylene, the distance between the extrusion roller 06 and the second heating roller 03 is controlled between 0.25mm and 15.8mm.

[0057] Meanwhile, the height adjustment unit 4 includes an adjusting arm mounting bracket 41, which is installed on the upper surface of the mounting frame 1 and located between the two extrusion units 04. The adjusting arm mounting bracket 41 includes a support column 412, which is vertically installed on the upper surface of the mounting frame 1. A bearing mounting head 411 is provided at the top of the support column 412, and an adjusting arm 42 is rotatably mounted on the bearing mounting head 411. A rotating rod mounting seat 421 for rotatably mounting on the bearing mounting head 411 is provided in the middle of the adjusting arm 42. Both ends of the adjusting arm 42 are... A connector 423 is fixedly connected, and a second rotating roller 424 is rotatably mounted on each connector 423. Rotating connecting rods 43 are rotatably engaged with the second rotating rollers 424 on both sides. The ends of the rotating connecting rods 43 away from the second rotating rollers 424 are rotatably connected to the rotating connectors 73 of the extrusion units 04 on both sides. A second pushing mechanism connecting plate 422 for connecting the second pushing mechanism 5 is provided on the bottom surface of the adjusting arm 42 near the high end of the arm body. The rotation of the adjusting arm 42 realizes the movement of the limiting pushing mechanisms 7 on both sides.

[0058] The second pushing mechanism 5 includes a pushing mechanism mounting base 51, which is mounted on the upper surface of the mounting frame 1 on one side of the support column 412. A second rotating base 52 is provided on the upper surface of the pushing mechanism mounting base 51. A second servo electric cylinder 53 is rotatably connected to the second rotating base 52. A piston rod is mounted on the top output end of the second servo electric cylinder 53. A rotating seat connector 54 is provided at the top end of the piston rod of the second servo electric cylinder 53. A rotating seat 55 is symmetrically rotatably fitted on the rotating seat connector 54. The rotating seat 55 is mounted on the second pushing mechanism connecting plate 422. The second servo electric cylinder 53 is used to push the adjusting arm 42 to rotate.

[0059] In this embodiment, when stretching the polytetrafluoroethylene (PTFE) fiber, the PTFE fiber is shaped and then transferred to the heating unit 01. The heating unit 01 performs preliminary heating on the PTFE fiber. The PTFE fiber passes between the first heating roller 012 and the pressing roller 013. During this process, the pressing roller 013 and the first heating roller 012 adhere the PTFE fiber together. Moreover, the two first heating rollers 012 allow for a longer heating time, thereby ensuring the heating effect. Furthermore, when heating PTFE fibers of different thicknesses, the distance between the first heating roller 012 and the pressing roller 013 can be adjusted according to the thickness of the PTFE fiber to ensure its compatibility.

[0060] The distance between the first heating roller 012 and the pressing roller 013 is achieved by adjusting the pressing roller adjustment mechanism 2. By controlling the first servo cylinder 221, the piston rod of the first servo cylinder 221 retracts and extends, driving the pressing roller mounting rotating frame 211 to rotate on the rotating frame 21, thereby adjusting the height of one side of the pressing roller 013 and changing the distance between the pressing roller 013 and the first heating roller 012. When the pressing roller mounting rotating frame 211 connected to the first pushing mechanism 22 moves, the pressing roller mounting rotating frame 211 will rotate in coordination with the linkage frame 3, thereby driving the pressing roller mounting rotating frame 211 on the other side to adjust synchronously. When the first servo cylinder 221 is adjusting, the height of the two pressing rollers 013 can be adjusted at the same time.

[0061] After the polytetrafluoroethylene (PTFE) fiber is initially heated after being transferred from the heating unit 01, it is transferred through the guide roller frame 02 to the second heating roller 03 near the heating unit 01, and then from the bottom of the second heating roller 03 near the heating unit 01 to the next second heating roller 03. When the PTFE fiber is transferred through the second heating roller 03 near the heating unit 01, the bottom surface of the PTFE fiber is squeezed by the extrusion rollers 06 on both sides, and the top surface is heated by the second heating roller 03, thereby making its thickness thinner and increasing the stretching area of ​​the PTFE fiber, thus improving its porosity.

[0062] When stretching polytetrafluoroethylene fibers with different compositions, in order to achieve a better porosity, the extrusion thickness of polytetrafluoroethylene fibers with different compositions is different. At this time, it is necessary to adjust the gap between the extrusion roller 06 and the second heating roller 03 to change the extrusion thickness.

[0063] When it is necessary to adjust the gap between the extrusion roller 06 and the second heating roller 03, the adjustment is made by the height adjustment units 4 on both sides. Both extrusion units 04 can be adjusted at one time, which ensures that the gap between the extrusion roller 06 and the second heating roller 03 on both sides is the same, and the extrusion effect will not be reduced due to deviation.

[0064] The second pushing mechanism 5 is driven to adjust the extrusion roller 06. The piston rod of the second servo electric cylinder 53 retracts or extends, thereby changing the height of the second rotating base 52. During this process, the upper part of the adjusting arm 42 is pushed out or pulled down, so that the rotating rod of the adjusting arm 42 rotates around the rotating rod mounting seat 421 as the axis. When the adjusting arm 42 rotates, the rotating connecting rods 43 on both sides pull the limiting pushing mechanism 7. The limiting pushing mechanism 7 moves vertically up and down on the slide rod 63. When the limiting pushing mechanism 7 moves vertically, it moves along the limiting slide groove 711. The change in position causes the single-rod bearings 93 on both sides to move synchronously. The single-rod bearings 93, together with the sliding base 82 at the bottom of the extrusion roller rotating seat 9, move linearly on the slide rail 81, thereby driving the extrusion roller 06 between the two bearing rotating seats 91 to move and change the position of the extrusion roller 06. This changes the distance between the extrusion roller 06 and the second heating roller 03, so that the second pushing mechanism 5 on both sides can simultaneously adjust the distance between the extrusion rollers 06 of the extrusion units 04 on both sides at one time, ensuring that the distance between the extrusion roller 06 and the second heating roller 03 is consistent after adjustment.

[0065] After the polytetrafluoroethylene fiber passes through the second heating roller 03 near the heating unit 01, it enters the second heating roller 03 on the other side. At this time, the bottom surface of the polytetrafluoroethylene fiber is heated in contact with the second heating roller 03, while the top surface is squeezed by the extrusion rollers 06 on both sides. In this way, the two extrusion units 04, together with the second heating roller 03, can effectively improve the extrusion and stretching effect.

[0066] In this invention, the extrusion unit 04 is used to extrude and stretch polytetrafluoroethylene (PTFE) fibers, thereby increasing the generation of micropores. When stretching PTFE fibers prepared with different compositions, the height adjustment unit 4, in conjunction with the second pushing mechanism 5, can simultaneously adjust the limiting pushing mechanisms 7 on both sides, thereby synchronously adjusting the extrusion rollers 06 and the second heating rollers 03 on both sides. This allows the second pushing mechanism 5 to simultaneously adjust the spacing of the extrusion rollers 06 of the extrusion unit 04 on both sides at one time, making the spacing between the extrusion rollers 06 and the second heating rollers 03 adjustable, while ensuring that there is no deviation in the spacing between the extrusion rollers 06 after adjustment.

[0067] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A stretching device for processing polytetrafluoroethylene fibers, comprising a mounting frame (1), characterized in that, One side of the mounting frame (1) is uniformly provided with a heating unit (01) in the transverse direction, a plurality of second heating rollers (03) are arranged and rotatably provided on the mounting frame (1) on one side of the heating unit (01) in the transverse direction, and guide roller frames (02) are symmetrically arranged on both sides of each second heating roller (03); The bottom of the second heating roller (03) on one side adjacent to the heating unit (01) is provided with an extrusion unit (04), the top of the second heating roller (03) away from the heating unit (01) and located at the other end of the mounting frame (1) is provided with an extrusion unit (04), two adjacent extrusion units (04) are mirror image arranged, and the extrusion units (04) away from the heating unit (01) are symmetrically provided with extrusion unit support frames (05), and the extrusion unit support frames (05) are installed on the mounting frame (1); The extrusion unit (04) comprises an extrusion unit mounting frame (6), a sliding mechanism (8) is symmetrically installed on the extrusion unit mounting frame (6), an extrusion roller rotating seat (9) is slidably arranged on the sliding mechanism (8), an extrusion roller (06) is rotatably arranged between the extrusion roller rotating seats (9) opposite to the second heating roller (03), the extrusion rollers (06) are symmetrically arranged on both sides of the second heating roller (03), a limiting push mechanism (7) for limiting the movement of the extrusion roller rotating seat (9) is vertically slidably arranged on the extrusion unit mounting frame (6), a height adjusting unit (4) is arranged between the limiting push mechanisms (7) on both sides, and a second push mechanism (5) is connected on one side of the height adjusting unit (4); The extrusion unit mounting frame (6) comprises a support base (61), a sliding rail mounting plate (62) is arranged on the support base (61), the sliding rail mounting plate (62) is symmetrically provided with the sliding mechanism (8) on the upper two side walls, a plurality of mounting holes for mounting the sliding mechanism (8) are uniformly arranged on the surfaces of the upper two side walls of the sliding rail mounting plate (62), a slide rod (63) is vertically and symmetrically arranged on one side of the support base (61) located on the sliding rail mounting plate (62), the limiting push mechanism (7) is slidably arranged on the slide rod (63), and the slide rod (63) is provided with a limiting stop block (64) for limiting the movement of the limiting push mechanism (7); The sliding mechanism (8) comprises a sliding rail (81), the sliding rail (81) is symmetrically installed on the surfaces of the upper two side walls of the sliding rail mounting plate (62), and the sliding rail (81) is slidably provided with a sliding base (82), and the sliding base (82) is provided with the extrusion roller rotating seat (9). The limiting push mechanism (7) comprises a limiting block (71), a limiting sliding groove (711) is horizontally and throughly formed on the limiting block (71) and is used for limiting the movement of the extrusion roller rotating seat (9), limiting blocks (71) are symmetrically arranged on the two sides of the limiting block (71) and are used for slidingly fitting on the sliding rod (63), a mounting lug (72) is fixedly connected to the bottom of the sidewall of the limiting block (71), the mounting lug (72) is provided with a rotating connecting head (73) for rotatingly connecting the height adjusting unit (4), and the limiting block (71) is used for ensuring that the two extrusion roller rotating seats (9) can move synchronously. The extrusion roller rotating seat (9) comprises a bearing rotating seat (91), the extrusion roller (06) is rotatingly fitted on the two bearing rotating seats (91), single-rod bearing mounting plates (911) are fixedly connected to the two sides of the surface of the bearing rotating seat (91) away from the extrusion roller (06), single-rod bearing mounting racks (92) are mounted at the single-rod bearing mounting plates (911), and the bottom of the bearing rotating seat (91) is symmetrically provided with mounting bottom plates (912) for being mounted on the sliding base (82). The single-rod bearing mounting rack (92) is provided with a single-rod bearing (93) rotatingly arranged at the middle of the surface of the rack body away from the bearing rotating seat (91), the single-rod bearing (93) is movably arranged at the limiting sliding groove (711), and the single-rod bearing (93) is used for driving the extrusion roller (06) to move. The height adjusting unit (4) comprises an adjusting arm mounting rack (41), the adjusting arm mounting rack (41) is mounted on the upper surface of the mounting rack (1) and is located between the two extrusion units (04), the adjusting arm mounting rack (41) comprises a support column (412), the support column (412) is vertically mounted on the upper surface of the mounting rack (1), the top of the support column (412) is provided with a bearing mounting head (411), and the bearing mounting head (411) is provided with an adjusting arm (42) rotatingly arranged thereon. The adjusting arm (42) is provided with a rotating rod mounting seat (421) rotatingly mounted on the bearing mounting head (411), the two ends of the adjusting arm (42) are fixedly connected with connecting heads (423), the connecting heads (423) are provided with second rotating rollers (424) rotatingly arranged thereon, the two second rotating rollers (424) are provided with rotating connecting rods (43) rotatingly fitted thereon, the other ends of the rotating connecting rods (43) away from the second rotating rollers (424) are rotatingly connected to the rotating connecting heads (73) of the two extrusion units (04), and the bottom end surface of the arm body close to the height is provided with a second push mechanism connecting plate (422) for connecting the second push mechanism (5). The adjusting arm (42) is rotated to drive the two limiting push mechanisms (7) to move.

2. The stretching apparatus for polytetrafluoroethylene fiber processing according to claim 1, characterized by The heating unit (01) comprises a pressing roller adjusting mechanism (2) symmetrically arranged on both sides of the mounting frame (1), a first heating roller (012) for preheating polytetrafluoroethylene is rotatably arranged between the pressing roller adjusting mechanisms (2) on both sides, a pressing roller (013) is movably arranged above the first heating roller (012), the two side ends of the pressing roller (013) are rotatably matched on the pressing roller adjusting mechanisms (2) on both sides, a driving motor (011) for driving the first heating roller (012) to rotate is symmetrically arranged on the mounting frame (1) and located at the bottom of the heating unit (01), the driving motor (011) drives the first heating roller (012) to rotate through chain transmission, and a linkage frame (3) is rotatably connected to the top of the pressing roller adjusting mechanism (2) on one side.

3. The stretching apparatus for polytetrafluoroethylene fiber processing according to claim 2, characterized by The pressing roller adjusting mechanism (2) comprises a rotating frame (21) symmetrically mounted on both sides of the first heating roller (012), a first pushing mechanism (22) is arranged on one side of the rotating frame (21), a first heating roller rotating seat (212) for mounting the first heating roller (012) is formed in the bottom of the rotating frame (21), a pressing roller mounting rotating frame (211) is rotatably arranged on the bottom of the rotating frame (21), the pressing roller (013) is rotatably matched on the pressing roller mounting rotating frames (211) on both sides, and the other side end of the pressing roller mounting rotating frame (211) away from the rotating frame (21) is rotatably connected to the first pushing mechanism (22). The first pushing mechanism (22) comprises a first rotating base (222), a first servo cylinder (221) is rotatably arranged on the first rotating base (222), a rotary connector (223) is rotatably connected to the top output end piston rod end of the first servo cylinder (221), the rotary connector (223) is rotatably matched at the other side end of the pressing roller mounting rotating frame (211) away from the rotating frame (21), and the top of the pressing roller mounting rotating frame (211) on one side is rotatably connected to the linkage frame (3).

4. The stretching apparatus for polytetrafluoroethylene fiber processing according to claim 3, characterized by The linkage frame (3) comprises an upper connecting plate (32), connecting side plates (31) are symmetrically mounted on the bottom of the upper connecting plate (32), first rotating rollers (33) are rotatably arranged at the two side ends of the connecting side plates (31) on both sides.

5. The stretching apparatus for polytetrafluoroethylene fiber processing according to claim 1, characterized by A driving mechanism (031) for driving the second heating roller (03) to rotate is arranged at one side end of the second heating roller (03), the driving mechanism (031) is mounted on the mounting frame (1), a heating roller rotating frame (032) is arranged at the other side end of the second heating roller (03) away from the driving mechanism (031), the second heating roller (03) is rotatably matched on the heating roller rotating frame (032) at one side end, the heating roller rotating frame (032) is mounted on the mounting frame (1), and the extrusion unit mounting frame (6) is symmetrically arranged between the heating roller rotating frame (032) and the driving mechanism (031).

6. The stretching apparatus for polytetrafluoroethylene fiber processing according to claim 1, characterized by The second pushing mechanism (5) comprises a pushing mechanism mounting base (51) installed at one side of the supporting column (412) at the upper surface of the mounting rack (1), a second rotating base (52) is arranged at the upper surface of the pushing mechanism mounting base (51), a second servo electric cylinder (53) is rotatably connected to the second rotating base (52), a piston rod is assembled to the top output end of the second servo electric cylinder (53), a rotating seat connecting head (54) is arranged at the top end of the piston rod of the second servo electric cylinder (53), and symmetrical rotating seats (55) are rotatably matched with the rotating seat connecting head (54), and the rotating seats (55) are installed at the second pushing mechanism connecting plate (422).

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