Stretching device for polytetrafluoroethylene fiber processing

Abstract

The invention relates to the field of polytetrafluoroethylene fiber stretching, in particular to a stretching device for polytetrafluoroethylene fiber processing, which comprises a mounting frame, heating units are uniformly arranged on one side of the mounting frame along the transverse direction, and a plurality of second heating rollers are uniformly and rotationally arranged on one side of the mounting frame, which is positioned on the heating units, along the transverse direction; according to the device, polytetrafluoroethylene fibers are extruded and stretched through the arranged extruding unit, so that generation of micropores is promoted, and when the polytetrafluoroethylene fibers prepared from different components are stretched, limiting pushing mechanisms on the two sides can be adjusted at the same time through cooperation of a height adjusting unit and a second pushing mechanism; the extrusion rollers on the two sides and the second heating roller are synchronously adjusted through the first pushing mechanism, so that the second pushing mechanism can synchronously adjust the distance between the extrusion rollers of the extrusion units on the two sides at a time, the distance between the extrusion rollers and the second heating roller is adjustable, and meanwhile it is guaranteed that no distance deviation is generated between the adjusted extrusion rollers.

Description

Technical Field

[0001] The invention relates to the technical field of polytetrafluoroethylene fiber stretching, in particular to a stretching device for polytetrafluoroethylene fiber processing. Background Art

[0002] ‌PTFE fiber is a high molecular polymer fiber made from PTFE, which is spun or made into a film and then cut or fibrillated. It has excellent chemical stability and corrosion resistance and can be used in extreme environments.

[0003] PTFE fiber stretching is a process in which mechanical force is used to deform the fiber in the length direction, thereby changing its physical and chemical properties. During the PTFE fiber stretching process, the strength of the mechanical force is often unable to be effectively controlled, and the stretching force of most equipment is fixed and cannot be changed when the PTFE fiber is stretched. When other materials are added to some PTFE fibers, the raw material ratio changes. If the stretching force cannot be changed, the stretched PTFE fiber cannot meet the production standards. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a stretching device for processing polytetrafluoroethylene fibers.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A stretching device for processing polytetrafluoroethylene fibers, comprising a mounting frame, a heating unit being evenly arranged in the transverse direction on one side of the mounting frame, a plurality of second heating rollers being evenly arranged and rotatably arranged in the transverse direction on one side of the heating unit on the mounting frame, and guide roller frames being symmetrically arranged on both sides of each of the second heating rollers; An extrusion unit is arranged at the bottom of the second heating roller on one side adjacent to the heating unit, and an extrusion unit is arranged at the top of the second heating roller far 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 far away from the heating unit, and the extrusion unit support frames are installed on the mounting frame; The extrusion unit includes an extrusion unit mounting frame, on which sliding mechanisms are symmetrically mounted, on which extrusion roller rotating seats are slidably arranged, and extrusion rollers are rotatably arranged between the extrusion roller rotating seats opposite to each other on both sides of the second heating roller, and the extrusion rollers are symmetrically arranged on both sides of the second heating roller, and a limit pushing mechanism for limiting the movement of the extrusion roller rotating seat is vertically slidably arranged on the extrusion unit mounting frame, and a height adjustment unit is arranged between the limit pushing mechanisms adjacent to each other on both sides, and a second pushing mechanism is connected to one side of the height adjustment unit.

[0006] In addition, a preferred structure is that the heating unit includes a laminating roller adjusting mechanism, which is symmetrically arranged on both sides of the mounting frame, and a first heating roller for preheating polytetrafluoroethylene is rotatably arranged between the laminating roller adjusting mechanisms on both sides, and a laminating roller is movably arranged above the first heating roller, and both side ends of the laminating roller are rotatably engaged with the laminating roller adjusting mechanisms on both sides respectively, and a driving 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, and the driving motor drives the first heating roller to rotate through a chain drive, and a linkage frame is rotatably connected to the top of the laminating roller adjusting mechanism between adjacent ones on one side.

[0007] In addition, a preferred structure is that the laminating roller adjustment mechanism includes a rotating frame, which is symmetrically mounted on both sides of the first heating roller, a first pushing mechanism is arranged 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 laminating roller mounting rotating frame is rotatably arranged at the bottom of the rotating frame, the laminating roller is rotatably matched with the laminating roller mounting rotating frames on both sides, and the laminating roller mounting rotating frame is rotatably connected to the first pushing mechanism at the other end away from the rotating frame; The first pushing mechanism includes a first rotating base, on which a first servo electric cylinder is rotatably arranged, a rotating connector is rotatably connected to the end of a piston rod at the top output end of the first servo electric cylinder, the rotating connector is rotatably fitted to the end of the other side of the lamination roller mounting rotating frame away from the rotating frame, and a linkage frame is rotatably connected to the top of the lamination roller mounting rotating frame on one side.

[0008] In addition, the preferred structure is that the linkage frame includes an upper connecting plate, and connecting side plates are symmetrically installed at the bottom of the upper connecting plate, and first rotating rollers are rotatably arranged at the ends of both sides of the connecting side plates, and the first rotating rollers are rotatably matched with the pressing rollers on both sides to install the rotating frame at the end of the other side away from the rotating frame.

[0009] In addition, a preferred structure is that a driving mechanism for driving the second heating roller to rotate is provided at one end of the second heating roller, the driving mechanism is installed on a mounting frame, a heating roller rotating frame is provided at the other end of the second heating roller away from the driving mechanism, one end of the second heating roller is rotatably engaged on the heating roller rotating frame, the heating roller rotating frame is installed on the mounting frame, and the extrusion unit mounting frame is symmetrically arranged between the heating roller rotating frame and the driving mechanism.

[0010] In addition, a preferred structure is that the extrusion unit mounting frame includes a support base, a slide rail mounting plate is arranged on the support base, sliding mechanisms are symmetrically installed on the side walls on both sides above the slide rail mounting plate, a plurality of mounting holes for installing the sliding mechanisms are evenly opened on the surface of the side walls on both sides above the slide rail mounting plate, the support base is vertically symmetrically provided with a sliding rod on one side of the slide rail mounting plate, the limit push mechanism is slidably matched on the sliding rod, and the top of the sliding rod is provided with a limit stopper that limits the movement of the limit push mechanism; The sliding mechanism comprises a slide rail, which is symmetrically mounted on the side wall surfaces on both sides above the slide rail mounting plate. The slide rails are slidably matched with a sliding base, and the sliding base is mounted with a squeezing roller rotating seat.

[0011] In addition, a preferred structure is that the limit pushing mechanism includes a limit block, a limit slide groove is transversely opened on the limit block to limit the movement of the extrusion roller rotating seat, sliders for slidingly fitting on the slide rod are symmetrically arranged on both sides of the limit block, a mounting protrusion is fixedly connected to the bottom of the side wall of one side of the limit block, and a rotating connecting head for rotatably connecting to the height adjustment unit is arranged on the mounting protrusion.

[0012] In addition, a preferred structure is that the squeezing roller rotating seat includes a bearing rotating seat, the squeezing roller is rotatably matched on the bearing rotating seats on both sides, the surface of the bearing rotating seat on one side away from the squeezing roller is symmetrically fixedly connected with a single-rod bearing mounting plate on both sides, a single-rod bearing mounting frame is installed on the single-rod bearing mounting plate, and a mounting base plate for mounting on the sliding base is symmetrically arranged at the bottom of the bearing rotating seat; A single-rod bearing is rotatably arranged on the middle part of a surface of one side of the single-rod bearing mounting frame away from the bearing rotating seat, and the single-rod bearing is movably arranged at the limiting sliding groove.

[0013] In addition, a preferred structure is that the height adjustment unit includes an adjustment arm mounting frame, the adjustment arm mounting frame is mounted on the upper surface of the mounting frame and is located between the extrusion units on both sides, the adjustment arm mounting frame includes a support column, the support column is vertically mounted on the upper surface of the mounting frame, a bearing mounting head is arranged on the top of the support column, and an adjustment arm is rotatably arranged on the bearing mounting head; A rotating rod mounting seat for rotatably mounting on a bearing mounting head is provided in the middle of the adjusting arm, and connecting heads are fixedly connected to the ends on both sides of the adjusting arm, and second rotating rollers are rotatably provided on the connecting heads, and the second rotating rollers on both sides are rotatably matched with rotating connecting rods, and the ends on the other side of the rotating connecting rods away from the second rotating rollers are rotatably connected to the rotating connecting heads of the extrusion units on both sides, and a second pushing mechanism connecting plate for connecting the second pushing mechanism is provided on the bottom surface of the arm body close to the height of the adjusting arm.

[0014] In addition, a preferred structure is that the second pushing mechanism includes a pushing mechanism mounting base, the pushing mechanism mounting base is mounted on the upper surface of the mounting frame and is located on one side of the support column, a second rotating base is provided on the upper surface of the pushing mechanism mounting base, a second servo electric cylinder is rotatably connected to the second rotating base, a piston rod is assembled at the top output end of the second servo electric cylinder, 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 matched on the rotating seat connector, and the rotating seat is installed on the connecting plate of the second pushing mechanism.

[0015] The beneficial effects of the present invention are as follows: in the present invention, the extrusion unit is used to realize the extrusion and stretching of the polytetrafluoroethylene fiber, thereby promoting the generation of micropores, and when stretching the polytetrafluoroethylene fiber prepared from different components, the height adjustment unit can be used in conjunction with the second pushing mechanism to simultaneously adjust the limit pushing mechanisms on both sides, thereby synchronously adjusting the extrusion rollers and the second heating rollers on both sides, so that the second pushing mechanism can synchronously adjust the spacing of the extrusion rollers of the extrusion units on both sides at one time, thereby making the spacing between the extrusion rollers and the second heating roller adjustable, while ensuring that there is no spacing deviation between the adjusted extrusion rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A is a schematic diagram of the overall structure of the present invention; Figure 2 FIG. b is a schematic diagram of the overall structure of the present invention; Figure 3 A is a structural schematic diagram of a heating unit; Figure 4 It is a structural schematic diagram B of the heating unit; Figure 5 It is a schematic diagram of the structure after the linkage frame and the lamination roller adjustment mechanism are separated; Figure 6 It is a structural schematic diagram of the linkage frame; Figure 7 It is a structural schematic diagram of the pressing roller adjustment mechanism; Figure 8 It is a schematic diagram of the structure of the extrusion unit and the second heating roller; Fig. 9 is a schematic structural diagram of a second heating roller; Fig.10 It is a structural schematic diagram of the extrusion unit; Fig.11 It is a partially enlarged structural schematic diagram of the extrusion unit; Fig.12 It is a schematic diagram of the structure after the sliding mechanism and the extrusion unit mounting frame are separated; Fig.13 It is a schematic diagram of the structure after the sliding mechanism is disassembled; Fig.14 It is a schematic diagram of the structure after the extrusion roller rotating seat is disassembled; Fig.15 c is a schematic diagram of the structure of the extrusion unit mounting frame; Fig.16 d is a structural schematic diagram of the extrusion unit mounting frame; Fig.17 It is a structural schematic diagram of the limit push mechanism; Fig.18 It is a structural schematic diagram of the height adjustment unit connected to the limit push mechanisms on both sides; Fig.19 is a structural schematic diagram of a height adjustment unit; Fig. 20 It is a schematic diagram of the structure after the height adjustment unit is disassembled; Fig.21 It is a structural schematic diagram of a partial enlargement of the regulating arm; Fig. 22 It is a structural schematic diagram of the first driving mechanism.

[0017] In the figure: 01, heating unit; 011, driving motor; 012, first heating roller; 013, pressing roller; 02, guide roller frame; 03, second heating roller; 031, driving mechanism; 032, heating roller rotating frame; 04, extrusion unit; 05, extrusion unit support frame; 06, extrusion roller; 1, mounting frame; 2, pressing roller adjustment 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, rotating 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 Rod mounting seat; 422, second pushing mechanism connecting plate; 423, connecting head; 424, second rotating roller; 43, rotating connecting rod; 5, second pushing mechanism; 51, pushing mechanism mounting base; 52, second rotating base; 53, second servo electric cylinder; 54, rotating seat connecting head; 55, rotating seat; 6, extrusion unit mounting frame; 61, supporting base; 62, slide rail mounting plate; 63, slide rod; 64, limiting block; 7, limiting pushing mechanism; 71, limiting block; 711, limiting slide groove; 72, mounting convex plate; 73, rotating connecting head; 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 frame; 93, single-rod bearing. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-22 A stretching device for processing polytetrafluoroethylene fibers comprises a mounting frame 1, a heating unit 01 is uniformly arranged on one side of the mounting frame 1 in the transverse direction, a plurality of second heating rollers 03 are uniformly arranged and rotated on one side of the heating unit 01 on the mounting frame 1 in the transverse direction, and guide roller frames 02 are symmetrically arranged on both sides of each second heating roller 03, an extrusion unit 04 is arranged on the bottom of the second heating roller 03 on the adjacent side of the heating unit 01, an extrusion unit 04 is arranged on 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, and extrusion unit support frames 05 are symmetrically installed on both sides of the extrusion unit 04 away from the heating unit 01, and the extrusion unit support frames 05 are installed on the mounting frame 1, the extrusion unit 04 is used to extrude the polytetrafluoroethylene fiber, thereby increasing its stretching area, and the extrusion unit 04 can be adjusted to change the distance between the extrusion roller 06 and the second heating roller 03.

[0020] Moreover, the extrusion unit 04 includes an extrusion unit mounting frame 6, on which a sliding mechanism 8 is symmetrically installed, on which an extrusion roller rotating seat 9 is slidably arranged, and an extrusion roller 06 is rotatably arranged between the extrusion roller rotating seats 9 opposite to 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, and a limiting pushing 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 adjustment unit 4 is arranged between the adjacent limiting pushing mechanisms 7 on both sides, and a second pushing mechanism 5 is connected to one side of the height adjustment unit 4. The height adjustment unit 4 cooperates with the second pushing mechanism 5 to simultaneously adjust the extrusion units 04 on both sides at one time.

[0021] In addition, the heating unit 01 includes a laminating 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 laminating roller adjustment mechanisms 2 on both sides. A laminating roller 013 is movably arranged above the first heating roller 012. The ends of the laminating roller 013 are rotatably matched with the laminating roller adjustment mechanisms 2 on both sides. A driving motor 011 located at the bottom of the heating unit 01 and used to drive the first heating roller 012 to rotate is symmetrically arranged on the mounting frame 1. The driving motor 011 drives the first heating roller 012 to rotate through a chain drive. The top of the laminating roller adjustment mechanism 2 on one side is rotatably connected to a linkage frame 3. The first heating roller 012 is used to preliminarily heat the polytetrafluoroethylene fiber so that the temperature of the polytetrafluoroethylene fiber can rise, thereby facilitating subsequent stretching. The surface temperature of the roller body of the first heating roller 012 is maintained at 180°C-200°C, and the surface linear speed of the first heating roller 012 is 8m-10m / min.

[0022] At the same time, the lamination roller adjustment mechanism 2 includes a rotating frame 21, which is 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 provided at the bottom of the rotating frame 21, a lamination roller mounting rotating frame 211 is rotatably arranged at the bottom of the rotating frame 21, the lamination roller 013 is rotatably matched on the lamination roller mounting rotating frames 211 on both sides, and the end of the lamination roller mounting rotating frame 211 away from the other side of the rotating frame 21 is rotatably connected to the first pushing mechanism 22, and the first pushing mechanism 2 2 comprises a first rotating base 222, on which a first servo electric cylinder 221 is rotatably arranged, a rotating connector 223 is rotatably connected at the end of the piston rod at the top output end of the first servo electric cylinder 221, the rotating connector 223 is rotatably matched at the end of the other side of the pressing roller mounting rotating frame 211 away from the rotating frame 21, and a linkage frame 3 is rotatably connected to the top of the pressing roller mounting rotating frame 211 on one side, and the first pushing mechanism 22 is used to realize that the pressing roller 013 and the first heating roller 012 work together to stick the polytetrafluoroethylene fiber, so as to ensure that it is heated more comprehensively.

[0023] At the same time, the linkage frame 3 includes an upper connecting plate 32, and a connecting side plate 31 is symmetrically installed at the bottom of the upper connecting plate 32. First rotating rollers 33 are rotatably arranged at the ends of the two side connecting side plates 31 on both sides. The first rotating rollers 33 are rotatably matched with the other side ends of the pressing roller installation rotating frames 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 pressing roller installation rotating frames 211 on both sides to move.

[0024] In addition, a driving mechanism 031 for driving the second heating roller 03 to rotate is provided at one end of the second heating roller 03, and the driving mechanism 031 is installed 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 driving mechanism 031. The second heating roller 03 rotates on the heating roller rotating frame 032 at one end of the second heating roller 03. The heating roller rotating frame 032 is installed on the mounting frame 1. The extrusion unit mounting frame 6 is symmetrically arranged between the heating roller rotating frame 032 and the driving mechanism 031. The driving mechanism 031 is composed of a motor and other equipment, and is used to drive the second heating roller 03 to rotate and transmit the polytetrafluoroethylene fiber. The surface temperature of the roller body of the second heating roller 03 is maintained between 150°C and 170°C, and the surface linear speed of the first heating roller 012 is 8m-10m / min. Among them, the extrusion unit mounting frame 6 includes a supporting base 61, a slide rail mounting plate 62 is arranged on the supporting base 61, sliding mechanisms 8 are symmetrically installed on the side walls on both sides above the slide rail mounting plate 62, and a plurality of mounting holes for installing the sliding mechanisms 8 are evenly opened on the surface of the side walls on both sides above the slide rail mounting plate 62. The supporting base 61 is vertically symmetrically provided with a slide rod 63 on one side of the slide rail mounting plate 62, and the limit pushing mechanism 7 is slidably fitted on the slide rod 63. A limit stopper 64 for limiting the movement of the limit pushing mechanism 7 is arranged on the top of the slide rod 63, and the limit stopper 64 prevents the limit pushing mechanism 7 from detaching.

[0025] Moreover, the sliding mechanism 8 includes a slide rail 81, which is symmetrically installed on the side wall surfaces on both sides above the slide rail mounting plate 62. The slide rail 81 is slidably matched with a sliding base 82, and the sliding base 82 is installed with an extrusion roller rotating seat 9. The slide rail 81 ensures that the extrusion roller rotating seat 9 moves in a linear manner.

[0026] At the same time, the limit pushing mechanism 7 includes a limit block 71, on which a limit slide groove 711 is horizontally opened to limit the movement of the squeezing roller rotating seat 9, and sliders 74 for slidingly fitting on the slide rod 63 are symmetrically arranged on both sides of the limit block 71. A mounting protrusion 72 is fixedly connected to the bottom of the side wall of one side of the limit block 71, and a rotating connecting head 73 for rotatably connecting the height adjustment unit 4 is arranged on the mounting protrusion 72. The limit block 71 is used to ensure that the squeezing roller rotating seats 9 on both sides can move synchronously.

[0027] In addition, 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. The two sides of the surface of the bearing rotating seat 91 away from the extrusion roller 06 are symmetrically fixedly connected with single-rod bearing mounting plates 911, and a single-rod bearing mounting frame 92 is installed on the single-rod bearing mounting plate 911. The bottom of the bearing rotating seat 91 is symmetrically provided with a mounting base plate 912 for installation on the sliding base 82. The single-rod bearing mounting frame 92 is rotatably provided with a single-rod bearing 93 in the middle of the surface of the side away from the bearing rotating seat 91. The single-rod bearing 93 is movably arranged at the limiting slide groove 711, and 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 to be 0.25mm-15.8mm.

[0028] At the same time, the height adjustment unit 4 includes an adjustment arm mounting frame 41, which is mounted on the upper surface of the mounting frame 1 and is located between the extrusion units 04 on both sides. The adjustment arm mounting frame 41 includes a support column 412, which is vertically mounted on the upper surface of the mounting frame 1. A bearing mounting head 411 is provided on the top of the support column 412, and an adjustment arm 42 is rotatably provided 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 adjustment arm 42. A connecting head 423 is fixedly connected, and a second rotating roller 424 is rotatably provided on the connecting head 423. The second rotating rollers 424 on both sides are rotatably matched with a rotating connecting rod 43. The other end of the rotating connecting rod 43 away from the second rotating roller 424 is rotatably connected to the rotating connecting head 73 of the extrusion unit 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 height of the arm body. The adjusting arm 42 rotates to push the limiting pushing mechanisms 7 on both sides to move.

[0029] Among them, the second pushing mechanism 5 includes a pushing mechanism mounting base 51, which is installed on the upper surface of the mounting frame 1 on one side of the support column 412, and a second rotating base 52 is arranged on the upper surface of the pushing mechanism mounting base 51, and a second servo electric cylinder 53 is rotatably connected to the second rotating base 52, and a piston rod is assembled at the top output end of the second servo electric cylinder 53, and a rotating seat connector 54 is arranged at the top end of the piston rod of the second servo electric cylinder 53, and a rotating seat 55 is symmetrically rotated on the rotating seat connector 54, and the rotating seat 55 is installed on the second pushing mechanism connecting plate 422, and the second servo electric cylinder 53 is used to push the adjusting arm 42 to rotate.

[0030] In this embodiment, when the polytetrafluoroethylene fiber is stretched, the polytetrafluoroethylene fiber is transferred to the heating unit 01 after being shaped, and the polytetrafluoroethylene fiber is preliminarily heated by the heating unit 01. The polytetrafluoroethylene fiber is transferred between the first heating roller 012 and the pressing roller 013. During this process, the pressing roller 013 and the first heating roller 012 will fit the polytetrafluoroethylene fiber together, and the two first heating rollers 012 make the heating time longer, thereby ensuring its heating effect, and when heating polytetrafluoroethylene 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 polytetrafluoroethylene fiber to ensure its adaptability.

[0031] The spacing between the first heating roller 012 and the laminating roller 013 is achieved through the laminating roller adjustment mechanism 2. By controlling the first servo electric cylinder 221, the piston rod of the first servo electric cylinder 221 is retracted and extended, driving the laminating roller mounting rotating frame 211 to rotate on the rotating frame 21, thereby adjusting the height of the laminating roller 013 on one side and changing the spacing between the laminating roller 013 and the first heating roller 012. When the laminating roller mounting rotating frame 211 connected to the first pushing mechanism 22 moves, the laminating roller mounting rotating frame 211 will rotate in coordination with the linkage frame 3, thereby driving the laminating roller mounting rotating frame 211 on the other side to be adjusted synchronously, so that when the first servo electric cylinder 221 is adjusted, the heights of the two laminating rollers 013 can be adjusted at the same time.

[0032] After the polytetrafluoroethylene fiber is transmitted from the heating unit 01 for preliminary heating, it is transmitted to the second heating roller 03 close to the heating unit 01 through the guide roller frame 02, and is transmitted from the bottom of the second heating roller 03 close to the heating unit 01 to the next second heating roller 03. When being transmitted through the second heating roller 03 close to the heating unit 01, the bottom surface of the polytetrafluoroethylene fiber is squeezed by the squeezing rollers 06 on both sides, and the top surface is heated by the second heating roller 03, thereby making its thickness thinner, so that the stretched area of ​​the polytetrafluoroethylene fiber becomes larger, thereby increasing its porosity.

[0033] When polytetrafluoroethylene fibers with different compositions are stretched, in order to achieve a better void ratio, the polytetrafluoroethylene fibers with different compositions have different extrusion thicknesses. 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.

[0034] When the gap between the squeezing roller 06 and the second heating roller 03 needs to be adjusted, the adjustment is performed through the height adjustment units 4 on both sides, and the squeezing units 04 on both sides can be adjusted at one time, thereby ensuring that the gap between the squeezing roller 06 and the second heating roller 03 on both sides is the same, and the squeezing effect will not be deteriorated due to deviation.

[0035] By driving the second pushing mechanism 5 to adjust the squeezing roller 06, the piston rod of the second servo electric cylinder 53 is contracted or extended to change the height of the second rotating base 52. In 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. When the adjusting arm 42 rotates, the rotating connecting rods 43 on both sides pull the limit pushing mechanism 7, and the limit pushing mechanism 7 moves vertically up and down on the sliding rod 63. When the limit pushing mechanism 7 moves vertically, along with the limit sliding groove 711 The change in position causes the single-rod bearings 93 on both sides to move synchronously. The single-rod bearings 93 cooperate with the sliding base 82 at the bottom of the extrusion roller rotating seat 9 to move linearly on the slide rail 81, thereby driving the extrusion roller 06 between the bearing rotating seats 91 on both sides to move, changing the position of the extrusion roller 06, thereby changing the distance between the extrusion roller 06 and the second heating roller 03. In this way, the second pushing mechanisms 5 on both sides can simultaneously adjust the spacing of the extrusion rollers 06 of the extrusion units 04 on both sides at one time to ensure that the adjusted spacing between the extrusion roller 06 and the second heating roller 03 is consistent.

[0036] After the polytetrafluoroethylene fiber passes through the second heating roller 03 close to 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 in contact with the second heating roller 03 and is heated, while the top surface is squeezed by the squeezing rollers 06 above the two sides. In this way, the two squeezing units 04 cooperate with the second heating roller 03 to effectively improve the squeezing and stretching effect.

[0037] In the present invention, the extrusion unit 04 is set to realize the extrusion and stretching of the polytetrafluoroethylene fiber, thereby improving the generation of its micropores, and when stretching the polytetrafluoroethylene fiber prepared with different components, the height adjustment unit 4 can cooperate with the second pushing mechanism 5 to simultaneously adjust the limit pushing mechanism 7 on both sides, so as to synchronously adjust the extrusion rollers 06 and the second heating roller 03 on both sides, so that the second pushing mechanism 5 can simultaneously adjust the spacing of the extrusion rollers 06 of the extrusion units 04 on both sides at one time, so that the spacing between the extrusion rollers 06 and the second heating roller 03 becomes adjustable, and at the same time ensure that there is no deviation in the spacing between the adjusted extrusion rollers 06.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stretching device for processing polytetrafluoroethylene fibers, comprising a mounting frame (1), characterized in that: A heating unit (01) is evenly arranged in the transverse direction on one side of the mounting frame (1); a plurality of second heating rollers (03) are evenly arranged and rotatably arranged in the transverse direction on one side of the heating unit (01) on the mounting frame (1); and guide roller frames (02) are symmetrically arranged on both sides of each of the second heating rollers (03); An extrusion unit (04) is arranged at the bottom of the second heating roller (03) on one side adjacent to the heating unit (01), and 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), the two adjacent extrusion units (04) are arranged in a mirror image, and extrusion unit support frames (05) are symmetrically installed on both sides of the extrusion unit (04) away from the heating unit (01), 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), on which a sliding mechanism (8) is symmetrically mounted, on which an extrusion roller rotating seat (9) is slidably mounted, and between the extrusion roller rotating seats (9) opposite to each other on both sides of the second heating roller (03), an extrusion roller (06) is rotatably mounted, and the extrusion rollers (06) are symmetrically mounted on both sides of the second heating roller (03), and a limit push mechanism (7) for limiting the movement of the extrusion roller rotating seat (9) is vertically slidably mounted on the extrusion unit mounting frame (6), and between the limit push mechanisms (7) adjacent to each other on both sides, a height adjustment unit (4) is mounted, and one side of the height adjustment unit (4) is connected to a second push mechanism (5).

2. The stretching device for processing polytetrafluoroethylene fibers according to claim 1, characterized in that: The heating unit (01) comprises a laminating roller adjustment mechanism (2), the laminating roller adjustment mechanism (2) being symmetrically arranged on both sides of the mounting frame (1), a first heating roller (012) for preheating polytetrafluoroethylene being rotatably arranged between the laminating roller adjustment mechanisms (2) on both sides, a laminating roller (013) being movably arranged above the first heating roller (012), both ends of the laminating roller (013) being rotatably engaged with the laminating roller adjustment mechanisms (2) on both sides, a driving motor (011) being symmetrically arranged on the mounting frame (1) and being located at the bottom of the heating unit (01) and being used for driving the first heating roller (012) to rotate, the driving motor (011) driving the first heating roller (012) to rotate via a chain drive, and a linkage frame (3) being rotatably connected to the top of the laminating roller adjustment mechanism (2) on one side.

3. The stretching device for processing polytetrafluoroethylene fibers according to claim 2, characterized in that: The laminating roller adjustment mechanism (2) comprises a rotating frame (21), the rotating frame (21) being symmetrically mounted on both sides of the first heating roller (012), a first pushing mechanism (22) being arranged on one side of the rotating frame (21), a first heating roller rotating seat (212) for mounting the first heating roller (012) being provided at the bottom of the rotating frame (21), a laminating roller mounting rotating frame (211) being rotatably arranged at the bottom of the rotating frame (21), the laminating roller (013) being rotatably engaged with the laminating roller mounting rotating frames (211) on both sides, and the end of the laminating roller mounting rotating frame (211) on the other side away from the rotating frame (21) being rotatably connected to the first pushing mechanism (22); The first pushing mechanism (22) comprises a first rotating base (222), a first servo electric cylinder (221) being rotatably arranged on the first rotating base (222), a rotating connector (223) being rotatably connected to the piston rod end of the top output end of the first servo electric cylinder (221), the rotating connector (223) being rotatably engaged with the end of the other side of the pressing roller mounting rotating frame (211) away from the rotating frame (21), and a linkage frame (3) being rotatably connected to the top of the pressing roller mounting rotating frame (211) on one side.

4. The stretching device for processing polytetrafluoroethylene fibers according to claim 3, characterized in that: The linkage frame (3) comprises an upper connection plate (32), a connection side plate (31) being symmetrically mounted on the bottom of the upper connection plate (32), first rotating rollers (33) being rotatably mounted at both ends of the connection side plates (31), and the first rotating rollers (33) are rotatably engaged with the other end of the pressing roller mounting rotating frame (211) on both sides away from the rotating frame (21).

5. The stretching device for processing polytetrafluoroethylene fibers according to claim 1, characterized in that: A driving mechanism (031) for driving the second heating roller (03) to rotate is provided at one end of the second heating roller (03), and the driving 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 driving mechanism (031). One end of the second heating roller (03) is rotatably engaged with the heating roller rotating frame (032), and 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 driving mechanism (031).

6. The stretching device for processing polytetrafluoroethylene fibers according to claim 5, characterized in that: The extrusion unit mounting frame (6) comprises a support base (61), a slide rail mounting plate (62) is arranged on the support base (61), sliding mechanisms (8) are symmetrically installed on the side walls on both sides above the slide rail mounting plate (62), a plurality of mounting holes for mounting the sliding mechanisms (8) are evenly opened on the surface of the side walls on both sides above the slide rail mounting plate (62), a slide rod (63) is vertically symmetrically arranged on one side of the support base (61) located on the slide rail mounting plate (62), a limit push mechanism (7) is slidably engaged on the slide rod (63), and a limit stopper (64) is arranged on the top of each slide rod (63) for limiting the movement of the limit push mechanism (7); The sliding mechanism (8) comprises a slide rail (81), the slide rail (81) being symmetrically mounted on the side wall surfaces on both sides above the slide rail mounting plate (62), the slide rail (81) being slidably matched with a slide base (82), and the slide base (82) being mounted with a squeezing roller rotating seat (9).

7. The stretching device for processing polytetrafluoroethylene fibers according to claim 6, characterized in that: The limit push mechanism (7) comprises a limit block (71), a limit slide groove (711) is formed on the limit block (71) to limit the movement of the squeezing roller rotating seat (9), and sliding blocks (74) are symmetrically arranged on both sides of the limit block (71) for slidingly engaging with the sliding rod (63). A mounting convex plate (72) is fixedly connected to the bottom of a side wall of one side of the limit block (71), and a rotating connector (73) is arranged on the mounting convex plate (72) for rotatably connecting to the height adjustment unit (4).

8. The stretching device for processing polytetrafluoroethylene fibers according to claim 7, characterized in that: The squeezing roller rotating seat (9) comprises a bearing rotating seat (91), the squeezing roller (06) is rotatably fitted on the bearing rotating seats (91) on both sides, a single-rod bearing mounting plate (911) is symmetrically fixedly connected to the surface of the side of the bearing rotating seat (91) away from the squeezing roller (06), a single-rod bearing mounting frame (92) is mounted on the single-rod bearing mounting plate (911), and 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 on the middle part of a surface of a side of the single-rod bearing mounting frame (92) away from the bearing rotating seat (91), and the single-rod bearing (93) is movably arranged at the limiting sliding groove (711).

9. The stretching device for processing polytetrafluoroethylene fibers according to claim 7, characterized in that: The height adjustment unit (4) comprises an adjustment arm mounting frame (41), the adjustment arm mounting frame (41) being mounted on the upper surface of the mounting frame (1) and being located between the extrusion units (04) on both sides, the adjustment arm mounting frame (41) comprising a support column (412), the support column (412) being vertically mounted on the upper surface of the mounting frame (1), a bearing mounting head (411) being arranged on the top of the support column (412), and an adjustment arm (42) being rotatably arranged 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); connecting heads (423) are fixedly connected at both ends of the adjusting arm (42); second rotating rollers (424) are rotatably provided on the connecting heads (423); rotating connecting rods (43) are rotatably matched at the second rotating rollers (424) on both sides; the other end of the rotating connecting rod (43) away from the second rotating roller (424) is rotatably connected to the rotating connecting heads (73) of the extrusion units (04) on both sides; and a second pushing mechanism connecting plate (422) for connecting the second pushing mechanism (5) is provided at the bottom surface of the adjusting arm (42) close to the height of the arm body.

10. The stretching device for processing polytetrafluoroethylene fibers according to claim 9, characterized in that: The second pushing mechanism (5) comprises a pushing mechanism mounting base (51), the pushing mechanism mounting base (51) being mounted on the upper surface of the mounting frame (1) and located on one side of the support column (412), a second rotating base (52) being arranged on the upper surface of the pushing mechanism mounting base (51), a second servo electric cylinder (53) being rotatably connected to the second rotating base (52), a piston rod being mounted on the top output end of the second servo electric cylinder (53), a rotating seat connector (54) being arranged at the top end of the piston rod of the second servo electric cylinder (53), a rotating seat (55) being symmetrically rotatably matched on the rotating seat connector (54), and the rotating seat (55) being mounted on the second pushing mechanism connecting plate (422).

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