A drawing mechanism for the production and processing of PTFE staple fibers

Abstract

The present invention belongs to the technical field of short fiber processing and utilization, and in particular relates to a drafting mechanism for the production and processing of PTFE short fibers. The present invention includes: a traction frame; a driving roller connected to the traction frame, and a plurality of driving wheels for conveying short fibers are connected to the driving roller; a guiding roller and a tensioning roller are respectively arranged on both sides of the driving roller, and the short fibers bypass from above the guiding roller and below the driving wheels respectively; a plurality of vertically movable lifting rods are connected along the length direction of the surface of the tensioning roller, and a first guiding wheel is connected to the lifting rod, and the heights of the first guiding wheel and the guiding roller are both higher than the height of the driving wheel. A plurality of rotatable rotating rods are symmetrically connected to both sides of the tensioning roller, the rotating rods are correspondingly matched with the lifting rods, and a second guiding wheel is connected to the rotating rods; by providing a protection mechanism on the fixing plate, when the short fiber thread is too tight, the protection mechanism makes the short fiber thread instantly change from a tensioned state to a loose state, achieving the purpose of protecting the thread.

Description

Technical Field

[0001] The present invention relates to the technical field of staple fiber processing equipment, and particularly relates to a drawing mechanism for PTFE staple fiber production and processing. Background Art

[0002] Textile fabric, also called non-woven fabric, is a fabric formed without the need for spinning and weaving. It is just to arrange textile staple fibers or filaments in a directional or random manner to form a fiber web structure, and then it is strengthened by mechanical, thermal bonding or chemical methods. The textile part is processed from staple fiber filaments. The melt spinning process mainly includes: extruding the melt through the spinneret orifice - the formation of the melt stream; the melt stream is stretched and thinned and cooled and solidified. The oiling and winding of the solid filament has the characteristics of high winding speed, no need for solvents and precipitants, simple equipment, and short process flow.

[0003] However, the staple fiber filaments are usually in a suspended state during the conveying process. If the distance between the conveying rollers is too long, due to the untimely lubrication degree and the difference in rotational speed of each conveying roller after long-term use of the equipment, the phenomenon of the staple fiber filaments being loose or taut will occur during the conveying process, and the drawing equipment cannot adjust the tightness of the spinning during the drawing process. The problem of the spinning breaking will occur during the winding process around the reel. After the filament breaks, it needs to be rewound, which affects the processing efficiency of the staple fiber. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a drawing mechanism for PTFE staple fiber production and processing. By providing a protection mechanism, the staple fiber can be instantly converted into a loose state, and the problem of the staple fiber filament breaking due to being too tight can be solved.

[0005] To achieve the above technical purpose, the specific technical solution of the present invention is as follows. A drawing mechanism for PTFE staple fiber production and processing proposed by the present invention includes: a traction frame; a driving roller connected to the traction frame, and a plurality of driving wheels for conveying staple fibers are connected to the driving roller; a guiding roller and a tensioning roller are respectively arranged on both sides of the driving roller, and the staple fibers respectively bypass above the guiding roller and below the driving wheels; a plurality of vertically movable lifting rods are connected along the length direction of the surface of the tensioning roller, and a first guiding wheel is connected to the lifting rod. The first guiding wheel is arranged above the tensioning roller, and the heights of both the first guiding wheel and the guiding roller are higher than the height of the driving wheel. A plurality of rotatable rotating rods are symmetrically connected to both sides of the tensioning roller, the rotating rods are correspondingly matched with the lifting rods, and a second guiding wheel is connected to the rotating rod. The staple fibers respectively bypass the first guiding wheel and the two second guiding wheels and are distributed in a triangular shape on the tensioning roller.

[0006] As a preferred technical solution of the present invention, a fixed plate is provided below the tensioning roller. The fixed plate is fixedly connected to the traction frame, and a plurality of slidable sliders that can move up and down are slidably connected to the fixed plate. The fixed plate is provided with sliding holes for sliding connection with the sliders. Connecting rods are rotatably connected between the sliders and the two corresponding rotating rods. When the sliders slide, the two rotating rods are driven to rotate to adjust the tension of the staple fiber.

[0007] As a preferred technical solution of the present invention, a through rod is fixedly connected to the lifting rod. The through rod extends below the tensioning roller, and a bracket is fixedly connected to the slider. The bracket is fixedly connected to the lower end of the through rod; when the tension of the staple fiber is too large, the two rotating rods are driven to rotate closer to each other, driving the slider to slide downward, and the slider drives the lifting rod to move downward, shortening the length of the staple fiber wound around the tensioning roller; and after the lifting rod descends, the height of the first guide wheel is lower than the height of the driving wheel.

[0008] As a preferred technical solution of the present invention, a protection mechanism is fixedly connected to the fixed plate to prevent the staple fiber from breaking due to excessive tightness. The protection mechanism is connected to the slider and is arranged below the slider.

[0009] As a preferred technical solution of the present invention, the protection mechanism includes: a connecting seat fixedly connected to the surface of the fixed plate; a lifting block slidably connected to the connecting seat and capable of moving up and down; a sliding groove for sliding connection with the lifting block is provided on the connecting seat, and an elastic component is connected between the lifting block and the slider.

[0010] As a preferred technical solution of the present invention, a support rod is rotatably connected to the surface of the connecting seat. A pull rod is rotatably connected between the support rod and the lifting block, and an elastic force mechanism is connected between the support rod and the surface of the connecting seat; when the support rod rotates to an inclined upward state, the elastic force mechanism applies an upward elastic force to the support rod; when the support rod rotates to an inclined downward state, the elastic force mechanism applies a downward elastic force to the support rod, and at this time the slider drives the lifting rod to move to the lowest position, and the corresponding staple fiber is in a loose state.

[0011] As a preferred technical solution of the present invention, the elastic component includes: a sleeve rod and a sleeve. The sleeve is movably connected to the surface of the sleeve rod, and a cylindrical spring is connected to the surface of the sleeve rod.

[0012] As a preferred technical solution of the present invention, the elastic force mechanism includes: a first rotating block rotatably connected to the surface of the connecting seat; a second rotating block rotatably connected to the surface of the support rod; a telescopic rod is fixedly connected between the first rotating block and the second rotating block, and a compression spring is connected to the surface of the telescopic rod.

[0013] As a preferred technical solution of the present invention, a stopper for limiting one side of the support rod is provided on the surface of the connecting seat.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. In the present invention, a protection mechanism is provided on the fixing plate. A connecting seat and a support rod are provided on the protection mechanism, and an elastic mechanism is connected between the support rod and the connecting seat. When the short fiber silk thread is too tight, it drives the lifting rod to descend, and then drives the slider to descend. By cooperating with the elasticity of the elastic mechanism, the support rod is converted from an inclined upward state to an inclined downward state, so that the short fiber silk thread is instantly changed from a tensioned state to a loose state, achieving the purpose of protecting the silk thread.

[0016] 2. In the present invention, a liftable lifting rod is connected to the tensioning roller, and a first guide wheel is connected to the lifting rod. When a malfunction of the equipment causes the short fiber silk thread to be too tight, the tension of the silk thread drives the lifting rod to descend, so that the height of the first guide wheel is lower than the height of the driving roller, and the short fiber silk thread is separated from the driving wheel. The driving wheel cannot continue to drive the silk thread for conveying. After the technical personnel check the equipment and reset it, the breakage of the silk thread is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a drafting mechanism for PTFE short fiber production and processing proposed by the present invention.

[0018] Figure 2 It is a front view schematic diagram of a drafting mechanism for PTFE short fiber production and processing proposed by the present invention.

[0019] Figure 3 It is a bottom view schematic diagram of a drafting mechanism for PTFE short fiber production and processing proposed by the present invention.

[0020] Figure 4 It is a connection schematic diagram of the tensioning roller and the protection mechanism proposed by the present invention.

[0021] Figure 5 It is a front view schematic diagram of the tensioning roller proposed by the present invention.

[0022] Figure 6 It is a schematic structural diagram of the protection mechanism proposed by the present invention.

[0023] Figure 7 It is a front view schematic diagram of the protection mechanism proposed by the present invention.

[0024] Figure 8 It is a schematic structural diagram of the elastic mechanism proposed by the present invention.

[0025] In the figure: 1. Traction frame; 2. Driving roller; 21. Driving wheel; 3. Guide roller; 4. Tensioning roller; 41. Lifting rod; 42. First guide wheel; 43. Rotating rod; 44. Second guide wheel; 45. Through rod; 5. Fixed plate; 51. Slide hole; 6. Protection mechanism; 61. Connecting seat; 62. Lifting block; 63. Chute; 64. Elastic component; 641. Sleeve; 642. Sleeve rod; 643. Cylindrical spring; 65. Elastic force mechanism; 651. First rotating block; 652. Second rotating block; 653. Telescopic rod; 654. Compression spring; 66. Support rod; 67. Pull rod; 68. Stopper; 7. Slide block; 8. Connecting rod; 9. Bracket. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0027] Embodiment 1

[0028] This embodiment discloses a drawing mechanism for the production and processing of PTFE staple fibers. As Figures 1 - 5 shown, it includes: a traction frame 1; a driving roller 2, which can be driven by a driving motor, the driving roller 2 is connected to the traction frame 1, and a plurality of driving wheels 21 for conveying staple fibers are connected to the driving roller 2; a guide roller 3 and a tensioning roller 4, which are respectively arranged on both sides of the driving roller 2, and the staple fibers respectively bypass from above the guide roller 3 and below the driving wheel 21; a plurality of liftable lifting rods 41 are connected to the surface of the tensioning roller 4 along its length direction, the number of the lifting rods 41 corresponds to the number of the staple fibers one by one, and a first guide wheel 42 is connected to the lifting rod 41, the first guide wheel 42 is arranged above the tensioning roller 4. During normal traction, the heights of the first guide wheel 42 and the guide roller 3 are both higher than the height of the driving wheel 21, increasing the length of the staple fiber wound around the driving wheel 21, so that the driving wheel 21 can drive the staple fiber to be conveyed when rotating; when the lifting rod 41 descends, the height of the first guide wheel 42 is lower than the height of the driving wheel 21, and a plurality of rotatable rotating rods 43 are symmetrically connected to both sides of the tensioning roller 4, the rotating rods 43 cooperate with the lifting rods 41 correspondingly, a second guide wheel 44 is connected to the rotating rod 43, after the staple fiber bypasses the driving wheel 21, it respectively bypasses the first guide wheel 42 and two second guide wheels 44 and is distributed in a triangular shape on the tensioning roller 4, and finally is led out from the first guide wheel 42 again.

[0029] As Figures 4 - 5As shown in the figure, a fixed plate 5 is provided below the tensioning roller 4. The fixed plate 5 is fixedly connected to the traction frame 1, and a plurality of slidable sliders 7 that can move up and down are slidably connected to the fixed plate 5. The number of sliders 7 corresponds one-to-one with the number of lifting rods 41. The fixed plate 5 is provided with sliding holes 51 that are slidably connected to the sliders 7. Connecting rods 8 are rotatably connected between each slider 7 and two corresponding rotating rods 43; a through rod 45 is fixedly connected to the lifting rod 41, and the through rod 45 extends below the tensioning roller 4. A support 9 is fixedly connected to the slider 7, and the support 9 is fixedly connected to the lower end of the through rod 45.

[0030] During specific implementation, when a fault occurs in the equipment and the staple fiber becomes tight, the greater the tension it receives, which drives the two rotating rods 43 to rotate closer to each other, driving the slider 7 to slide downward. The downward movement of the slider 7 drives the lifting rod 41 to move downward; the downward movement of the lifting rod 41 and the inward rotation of the rotating rod 43 bring two beneficial effects: one is to shorten the length of the staple fiber wound around the tensioning roller 4, reduce the tension on the staple fiber, and achieve the purpose of adjusting the tension of the staple fiber; the other is that when the lifting rod 41 descends to the lowest position, the height of the first guide wheel 42 is lower than the height of the driving wheel 21, so that the staple fiber is separated from the driving wheel 21 and no longer in contact. When the driving wheel 21 continues to rotate, it no longer drives the staple fiber to be conveyed, achieving the purpose of protecting the staple fiber.

[0031] Embodiment 2

[0032] Based on the structure of the above Embodiment 1, the difference is that, as Figure 4 、 Figures 6 - 8 shown, in this embodiment, a protection mechanism 6 is fixedly connected to the fixed plate 5 to prevent the staple fiber from being too tight and breaking. The protection mechanism 6 corresponds one-to-one with the slider 7 and is arranged below the slider 7; the protection mechanism 6 includes: a connecting seat 61, fixedly connected to the surface of the fixed plate 5; a lifting block 62, slidably connected to the connecting seat 61 and capable of moving up and down; the connecting seat 61 is provided with a sliding groove 63 that is slidably connected to the lifting block 62. An elastic component 64 is connected between the lifting block 62 and the slider 7. The elastic component 64 plays a role in resetting the slider 7 and supporting and buffering, and can be used to adjust the tension of the staple fiber to ensure that the staple fiber is in an appropriate tension degree; a support rod 66 is rotatably connected to the surface of the connecting seat 61, and a pull rod 67 is rotatably connected between the support rod 66 and the lifting block 62. When the lifting block 62 moves up and down, it drives the support rod 66 to rotate, and an elastic force mechanism 65 is connected between the support rod 66 and the surface of the connecting seat 61; the mechanism of action of the elastic force mechanism 65 is: when the support rod 66 rotates to an inclined upward state, the elastic force mechanism 65 applies an upward elastic force to the support rod 66; when the support rod 66 rotates to an inclined downward state, the elastic force mechanism 65 applies a downward elastic force to the support rod 66, and at this time, the slider 7 drives the lifting rod 41 to move to the lowest position, and the corresponding staple fiber is in a loose state.

[0033] Preferably, the elastic component 64 includes a sleeve rod 642 and a sleeve 641. The sleeve rod 642 is fixedly connected to the lifting block 62, and the sleeve 641 is fixedly connected to the slider 7. The sleeve 641 is movably connected to the surface of the sleeve rod 642, and a cylindrical spring 643 is connected to the surface of the sleeve rod 642. When the slider 7 descends, it drives the sleeve 641 to descend, compressing the cylindrical spring 643.

[0034] Preferably, as Figure 8 shown, the elastic force mechanism 65 includes a first rotating block 651 rotatably connected to the surface of the connecting seat 61; a second rotating block 652 rotatably connected to the surface of the support rod 66; a telescopic rod 653 fixedly connected between the first rotating block 651 and the second rotating block 652, and a compression spring 654 is connected to the surface of the telescopic rod 653; the compression spring 654 always exerts an elastic force on the first rotating block 651 and the second rotating block 652, and when the support rod 66 rotates to the horizontal state, the telescopic rod 653 and the support rod 66 are in the same straight line. When the support rod 66 is in two states of tilting upward and tilting downward respectively, the elastic force mechanism 65 exerts upward and downward component forces on the support rod 66 respectively.

[0035] Preferably, a stop block 68 for limiting one side of the support rod 66 is provided on the surface of the connecting seat 61, and the stop block 68 is arranged above the support rod 66.

[0036] During specific implementation: when a fault occurs in the equipment and the short fiber tension continues to become tight, it drives the slider 7 to slide downward. The elastic component 64 is first compressed by force, and at the same time drives the lifting block 62 to slide downward. At this time, the support rod 66 is still in the tilted upward state. When the short fiber tension continues to increase, the slider 7 drives the lifting block 62 to continue to descend, and the support rod 66 changes from the tilted upward state to the tilted downward state. At this time, the support rod 66 receives a downward component force from the elastic force mechanism 65, causing the lifting block 62 to descend to the lowest point greatly, so that the short fiber silk thread instantly changes to a completely loose state, thus avoiding the breakage of the silk thread. After the technical personnel check and repair the equipment, then manually rotate the support rod 66 to make it re-enter the tilted upward state, and the lifting rod 41 moves to the highest point, making the silk thread re-enter the taut state.

[0037] Finally, it should be noted that: in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drafting mechanism for the production and processing of PTFE staple fibers, characterized in that, Comprising: A traction frame (1); A driving roller (2), connected to the traction frame (1), and a plurality of driving wheels (21) for conveying staple fibers are connected to the driving roller (2); A guiding roller (3) and a tensioning roller (4) are respectively arranged on both sides of the driving roller (2), and the staple fibers respectively bypass above the guiding roller (3) and below the driving wheels (21); A plurality of vertically movable lifting rods (41) are connected to the surface of the tensioning roller (4) along its length direction, and a first guiding wheel (42) is connected to the lifting rod (41). The first guiding wheel (42) is arranged above the tensioning roller (4), and the heights of both the first guiding wheel (42) and the guiding roller (3) are higher than the height of the driving wheels (21); A plurality of rotatable rotating rods (43) are symmetrically connected to both sides of the tensioning roller (4), the rotating rods (43) are correspondingly matched with the lifting rods (41), and a second guiding wheel (44) is connected to the rotating rods (43). The staple fibers respectively bypass the first guiding wheel (42) and the two second guiding wheels (44) and are distributed in a triangular shape on the tensioning roller (4); A fixing plate (5) is arranged below the tensioning roller (4), the fixing plate (5) is fixedly connected to the traction frame (1), and a plurality of vertically movable sliders (7) are slidably connected to the fixing plate (5). A sliding hole (51) for slidably connecting the sliders (7) is arranged on the fixing plate (5). A connecting rod (8) is rotatably connected between each slider (7) and two corresponding rotating rods (43). When the slider (7) slides, it drives the two rotating rods (43) to rotate, thereby adjusting the tension of the staple fibers; A through rod (45) is fixedly connected to the lifting rod (41), the through rod (45) extends below the tensioning roller (4), and a bracket (9) is fixedly connected to the slider (7). The bracket (9) is fixedly connected to the lower end of the through rod (45); when the tension of the staple fibers is too large, it drives the two rotating rods (43) to rotate towards each other, drives the slider (7) to slide downward, and the slider (7) drives the lifting rod (41) to move downward, shortening the length of the staple fibers wound around the tensioning roller (4); and after the lifting rod (41) descends, the height of the first guiding wheel (42) is lower than the height of the driving wheels (21).

2. The drawing mechanism for PTFE staple fiber production and processing according to claim 1, characterized in that, A protection mechanism (6) is fixedly connected to the fixing plate (5) for preventing the staple fibers from breaking due to excessive tightness. The protection mechanism (6) is connected to the slider (7) and is arranged below the slider (7).

3. The drawing mechanism for the production and processing of PTFE staple fibers according to claim 2, wherein, The protection mechanism (6) includes: a connecting seat (61), fixedly connected to the surface of the fixing plate (5); a lifting block (62), slidably connected to the connecting seat (61) and capable of moving up and down; a sliding groove (63) for slidably connecting the lifting block (62) is arranged on the connecting seat (61), and an elastic component (64) is connected between the lifting block (62) and the slider (7).

4. The drawing mechanism for PTFE staple fiber production and processing according to claim 3, characterized in that, A support rod (66) is rotatably connected to the surface of the connecting seat (61). A pull rod (67) is rotatably connected between the support rod (66) and the lifting block (62). A elastic force mechanism (65) is connected between the support rod (66) and the surface of the connecting seat (61). When the support rod (66) rotates to an inclined upward state, the elastic force mechanism (65) applies an upward elastic force to the support rod (66). When the support rod (66) rotates to an inclined downward state, the elastic force mechanism (65) applies a downward elastic force to the support rod (66). At this time, the slider (7) drives the lifting rod (41) to move to the lowest position, and the corresponding staple fibers are in a loose state.

5. The drawing mechanism for PTFE staple fiber production and processing according to claim 4, characterized in that, The elastic component (64) includes: a sleeve rod (642) and a sleeve (641). The sleeve (641) is movably connected to the surface of the sleeve rod (642), and a cylindrical spring (643) is connected to the surface of the sleeve rod (642).

6. The drawing mechanism for PTFE staple fiber production and processing according to claim 5, characterized in that, The elastic force mechanism (65) includes: a first rotating block (651) rotatably connected to the surface of the connecting seat (61); a second rotating block (652) rotatably connected to the surface of the support rod (66); A telescopic rod (653) is fixedly connected between the first rotating block (651) and the second rotating block (652), and a compression spring (654) is connected to the surface of the telescopic rod (653).

7. A drawing mechanism for PTFE staple fiber production and processing according to claim 6, characterized in that, A stop block (68) for limiting one side of the support rod (66) is provided on the surface of the connecting seat (61).

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