A method for preparing carbon fiber needle felt

Abstract

The present invention belongs to the technical field of carbon fiber, and specifically is a method for preparing a carbon fiber needle-punched felt. The raw material of the carbon fiber needle-punched felt is asphalt-based carbon fiber, and the structure consists of an initial pre-layer, a buffer layer, a high-density layer, and a heat-sealing layer. The initial pre-layer is located on the upper surface layer, the buffer layer is located below the initial pre-layer, the high-density layer is located below the buffer layer, and the heat-sealing layer is located on the lower surface layer of the high-density layer. The needle-punching device used in the present invention can disassemble all the needles at one time when all the needles are damaged, thereby avoiding the tedious process of disassembling each needle one by one, and significantly improving the efficiency of replacing the needles.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon fiber felt, in particular to a method for preparing carbon fiber needle-punched felt. Background Art

[0002] Carbon fiber felt is a high-tech material with broad application prospects. Its excellent performance and diverse application fields make it one of the indispensable and important materials in modern industry.

[0003] In order to ensure the structural stability and excellent performance of carbon fiber felt, in the production of carbon fiber felt, multiple needling passes are required through needling equipment to form a tight felt body with a certain thickness and density. The processed carbon fiber felt not only has excellent mechanical properties, but also inherits the good thermal insulation performance and chemical stability of carbon fiber felt, thus meeting the needs of various high-end applications.

[0004] A patent application with publication number CN104999724B discloses a carbon fiber oxygen-enriched filament needle felt and its preparation method and application. The raw material used for the carbon fiber oxygen-enriched filament needle felt is carbon fiber oxygen-enriched filament, and the structure consists of an initial pre-layer, a high-density layer, and a heat-sealing layer; the initial pre-layer is located on the upper surface layer, the high-density layer is located in the middle layer, and the heat-sealing layer is located on the lower surface layer. The carbon fiber oxygen-enriched filament needle felt in the above application has the characteristics of acid and alkali resistance, high temperature resistance, non-combustibility, oxidation resistance, sound insulation, etc., is suitable for use under various environmental conditions, and has a wide range of uses.

[0005] However, when the above-mentioned carbon fiber oxygen-enriched yarn needle felt is produced, a needle punching device is required to compound materials of different layers. When the needles are damaged, the needle plates need to be completely disassembled, and then the needles need to be hammered out or pulled out one by one with special tools. However, it takes a lot of time and effort to remove the damaged needles one by one, which increases the equipment downtime and reduces the processing and production efficiency of the pre-oxidized yarn felt.

[0006] To this end, the present invention provides a method for preparing a carbon fiber needle-punched felt. Summary of the invention

[0007] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0008] The technical solution adopted by the present invention to solve the technical problem is: a method for preparing a carbon fiber needle-punched felt according to the present invention, wherein the raw material of the carbon fiber needle-punched felt is asphalt-based carbon fiber, and the structure consists of a primary pre-layer, a buffer layer, a high-density layer, and a heat-sealing layer, wherein the primary pre-layer is located at the bottom layer, the buffer layer is located at the upper surface layer of the primary pre-layer, the high-density layer is located at the upper surface layer of the buffer layer, and the heat-sealing layer is located at the upper surface layer of the high-density layer;

[0009] The following steps are involved:

[0010] S1 Raw material preparation: Select asphalt-based carbon fiber of qualified quality as raw material, and wash and dry the asphalt-based carbon fiber;

[0011] S2 Preparation of the initial pre-layer: The raw materials are put into the bag opener to initially break and loosen the fibers. The initially loosened fibers are sent to the coarse opener. The coarsely opened fibers are transported to the mixing bin for full mixing. The mixed fibers are sent to the fine opener for further refinement and loosening to obtain fluffy and dispersed fibers. The finely opened fibers are sent to the carding machine, and the fibers are dispersed and arranged in parallel by the carding needles. The carded fibers are evenly laid into the initial pre-layer by the web laying machine;

[0012] S3 buffer layer preparation: polyurethane fiber is selected as the buffer layer material, and the polyurethane fiber is evenly laid on the surface of the primary pre-layer to form a buffer layer, and then the buffer layer and the primary pre-layer are pressed together by a pressing roller so that the buffer layer and the primary pre-layer are closely attached;

[0013] S4 high-density layer preparation: On the basis of the buffer layer, asphalt-based carbon fiber is added and needle-punched by a needle-punching device. After multiple needle-punching treatments, the fiber is repeatedly punctured and pulled, tightly combined with the buffer layer to form a tight three-dimensional mesh structure, thus forming a high-density layer;

[0014] S5 heat sealing layer preparation: Asphalt-based carbon fibers are added again on the lower surface of the high-density layer, and the fibers are heat-melted by a heat sealing machine to form a stable bond to form a heat sealing layer, and the heat sealing temperature is 200°C to 300°C, and the heat sealing time is 3s to 10s;

[0015] S6 needle punched felt forming: the initial pre-layer, high-density layer and heat-sealing layer are processed by four composite processes through the main needle punching machine and the counter needle punching machine to ensure the close combination of each layer. The needle punching process parameters are adjusted to achieve the required breaking strength, elongation, thickness, density and gram weight requirements. After calendering and ironing, carbon fiber needle punched felt can be obtained.

[0016] Preferably, the needling device in the preparation of the S4 high-density layer includes a bottom plate, the upper surface of the bottom plate is rotatably connected to a winding roller, one side of the winding roller is provided with a needling mechanism, the needling mechanism is used to perform a needling operation on the carbon fiber felt, the needling mechanism includes a needling frame fixedly connected to the upper surface of the bottom plate, a sliding rod is symmetrically slidably provided on the inner upper surface of the needling frame, one end of the sliding rod is fixedly connected to a moving plate, the interior of the moving plate is slidably connected to a mounting plate, the lower surface of the mounting plate is symmetrically fixedly connected to a plurality of mounting blocks, each of the mounting blocks The first plug rod is symmetrically and slidably arranged inside the block, the surface of each mounting block is slidably connected to a connecting frame, the inner lower surface of each connecting frame is slidably arranged with a needle, the inner side wall of each connecting frame is symmetrically opened with a first plug hole, the inside of the first plug hole is slidably connected with an extrusion block, the lower surface of the mounting plate is fixedly connected with a fixing frame at both ends, the inside of the fixing frame is symmetrically and slidably connected with a moving frame, the inner wall of the acupuncture frame is symmetrically and fixedly arranged with a supporting plate, and a feeding roller is rotatably arranged on the upper surface of the bottom plate and located on one side of the acupuncture frame.

[0017] Preferably, a transmission frame is fixedly connected to the upper surface of the acupuncture frame, a motor is fixedly connected to one side of the transmission frame, a transmission rod is fixedly connected to the output end of the motor, a cam is symmetrically fixedly connected to the surface of the transmission rod, a connecting plate is fixedly connected to one end of the sliding rod, and the upper surface of the connecting plate is in contact with the circumferential surface of the cam, and a first spring is fixedly connected between the upper surface of the movable plate and the inner upper surface of the acupuncture frame.

[0018] Preferably, a positioning rod is symmetrically fixedly connected to the upper surface of the mounting plate, the surface of the positioning rod is slidingly connected to the inside of the movable plate, a first screw rod is threadedly connected to the upper surface of the mounting plate, one end of the first screw rod is rotationally connected to the inside of the movable plate, and a telescopic rod is symmetrically fixedly connected to the lower surface of the movable plate, and the movable end of the telescopic rod is fixedly connected to the upper surface of the mounting plate.

[0019] Preferably, each of the fixed frames is internally rotatably connected with a bidirectional screw rod, one end of the two movable frames is threadedly connected to the two ends of the bidirectional screw rod, one end of each bidirectional screw rod is fixedly connected to a worm gear, the lower surface of the mounting plate is fixedly connected to a fixed disk, the internal rotatable connection of the fixed disk is connected to a worm gear, and the worm gear and the worm gear are meshed with each other, a plurality of fixing holes are provided on one side of the fixed disk, one of the fixing holes is internally slidably connected with a screw rod, one end of the screw rod is threadedly connected to a rotating disk, one side of the rotating disk is fixedly connected to one end of the worm gear, the size of the first plug rod matches the size of the first plug hole, and one side of the first plug rod is fixedly connected to a second spring.

[0020] Preferably, the extrusion block is slidably connected to an extrusion rod, the surface of the extrusion rod is fixedly connected to a cone block, the surface of the cone block is symmetrically slidably connected to a second plug rod, the surface of each of the second plug rods is slidably connected to a plug rack, each of the plug racks is fixedly connected to the interior of the extrusion block, the two sides of the connecting frame are symmetrically fixedly connected to second limit frames, the interior of the second limit frame is provided with a second plug hole, and the size of the second plug rod matches the size of the second plug rod.

[0021] Preferably, a fourth spring is fixedly connected between the surface of the first insertion rod and the inner wall of the insertion rack, a fifth spring is fixedly connected between one end of the extrusion rod and the inner wall of the extrusion block, and a ball is rotatably connected to one end of each extrusion rod.

[0022] Preferably, the movable frame is fixedly connected to a plurality of connecting blocks inside, each of the connecting blocks is slidably connected to a movable rod inside, the surface of the movable rod is symmetrically fixedly connected to a first limiting frame, the first limiting frame is provided with a slide groove inside, the slide groove is slidably connected to a slider inside, one end of each slider is fixedly connected to a gear, the gear and the connecting block are rotatably connected inside, the connecting blocks are rotatably connected to a gear column inside, and the gear column and the gear are meshed with each other.

[0023] Preferably, one end of the tooth column is fixedly connected to a positioning plate, the positioning plate is internally slidably connected to a limiting rod, the surface of the limiting rod and the lower surface of the positioning plate are fixedly connected to a third spring, one end of the tooth column is located at the bottom side of the positioning plate and is rotatably connected to the limiting plate, the limiting plate and the upper surface of the connecting block are fixedly connected, a first limiting groove is provided inside the limiting plate, an initial groove is provided on one side of the first limiting groove, a second limiting groove is provided on one side of the initial groove, and the initial groove and the second limiting block are both opened inside the limiting plate.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. A method for preparing carbon fiber needle-punched felt described in the present invention comprises a movable frame, when all the needles inside the connecting frame are damaged, the movable frame is driven to move, the movable frame pushes the extrusion rod to move inside the extrusion block, the extrusion rod drives the cone block to move, the cone block slides inside the extrusion block, so that the second plug rod moves inside the extrusion block, and the second plug rod is separated from the second plug hole. At this time, the movable block pushes the extrusion rod to move, which can drive the extrusion block to move, and the extrusion block drives the first plug rod to be separated from the inside of the first plug hole, so that the limit between the connecting frame and the mounting block is released, and the connecting frame drives the needles to fall, so that all the needles can be quickly disassembled, and new needles can be replaced inside the connecting frame for reinstallation. This structure can disassemble all the needles at one time when all the needles are damaged, avoiding the tedious process of disassembling each needle one by one, and significantly improving the efficiency of replacing the needles.

[0026] 2. A method for preparing a carbon fiber needle-punched felt described in the present invention, when the number of damaged needles is greater than the number of undamaged needles, the movable rod can be driven to slide toward the inside of the movable block, and when the movable frame drives the connecting block to move, the extrusion rod at the undamaged part enters the interior of the connecting block and is not squeezed by the movable rod, so it will not fall off, and the extrusion rod at the damaged part is squeezed by the movable rod, and can be replaced if it falls off, and when the number of damaged needles is less than the number of undamaged needles, the movable rod is driven to slide toward the outside of the connecting block so that the movable rod protrudes from the connecting block, and when the movable frame drives the connecting block to move, the extrusion rod at the damaged part contacts the movable rod first, so that the damaged needles fall off, and at this time, the extrusion rod at the undamaged part does not contact the movable rod, so it maintains a fixed installation state, and the position of the movable rod is adjusted according to the number of damaged needles to achieve fast and effective disassembly, which greatly reduces the time and labor cost required for replacing the needles. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the carbon fiber needle felt of the present invention;

[0029] Figure 2 is a flow chart of a method for preparing carbon fiber needle felt of the present invention;

[0030] Figure 3 is a schematic structural diagram of the acupuncture device of the present invention;

[0031] Figure 4 It is a schematic diagram of the overall structure of removing carbon fiber felt in the present invention;

[0032] Figure 5 It is a structural schematic diagram of the mounting plate of the present invention;

[0033] Figure 6 The present invention Figure 5 A partial enlarged view of middle A;

[0034] Figure 7 It is a structural schematic diagram of the mounting block and the connecting frame of the present invention;

[0035] Figure 8 is a cross-sectional view of the internal structure of the mounting block and the connecting frame of the present invention;

[0036] Fig. 9 The present invention Figure 8 A partial enlarged view of B in the middle;

[0037] Fig.10 It is a schematic diagram of the structure of the fixed frame, the movable frame and the connecting block of the present invention;

[0038] Fig.11It is a schematic diagram of the internal structure of the fixing frame of the present invention;

[0039] Fig.12 It is a structural schematic diagram of the connection block of the present invention;

[0040] Fig.13 It is a schematic diagram of the structure of the gear and the moving rod of the present invention;

[0041] Fig.14 It is a structural exploded diagram of the gear and the moving rod of the present invention;

[0042] Fig.15 It is a structural schematic diagram of the positioning plate and the limiting plate of the present invention;

[0043] In the figure: 9, carbon fiber needle felt; 91, initial pre-layer; 92, buffer layer; 93, high-density layer; 94, heat-sealing layer; 1, bottom plate; 2, winding roller; 21, feeding roller; 3, needle frame; 4, sliding rod; 41, connecting plate; 42, moving plate; 43, first spring; 44, first screw rod; 45, telescopic rod; 56, positioning rod; 5, mounting plate; 51, mounting block; 511, second spring; 512, first plug rod; 52, fixed frame; 521, two-way screw rod; 522, worm gear; 523, moving frame; 53, worm; 531, turntable; 532, screw rod; 533, fixed plate; 534, fixing hole; 54, connecting block; 54 1. Moving rod; 542. First limiting frame; 543. Slide groove; 544. Gear; 545. Sliding block; 546. Gear column; 547. Positioning plate; 548. Limiting rod; 549. Third spring; 55. Limiting plate; 551. First limiting groove; 552. Initial groove; 553. Second limiting groove; 6. Connecting frame; 61. Needle; 62. Extrusion block; 621. Insert frame; 622. Second insert rod; 623. Fourth spring; 624. Extrusion rod; 625. Ball; 626. Cone block; 627. Fifth spring; 63. Second limiting frame; 631. Second jack; 7. Transmission frame; 71. Motor; 72. Cam; 8. Support plate. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0045] like Figure 1 and Figure 2 As shown, the present invention provides a method for preparing a carbon fiber needle felt, wherein the raw material of the carbon fiber needle felt 9 is asphalt-based carbon fiber, and the structure consists of an initial pre-layer 91, a buffer layer 92, a high-density layer 93, and a heat-sealing layer 94, wherein the initial pre-layer 91 is located at the bottom layer, the buffer layer 92 is located at the upper surface layer of the initial pre-layer 91, the high-density layer 93 is located at the upper surface layer of the buffer layer 92, and the heat-sealing layer 94 is located at the upper surface layer of the high-density layer 93;

[0046] The following steps are involved:

[0047] S1 Raw material preparation: Select asphalt-based carbon fiber of qualified quality as raw material, and wash and dry the asphalt-based carbon fiber;

[0048] S2 Preparation of the initial pre-layer: The raw materials are put into the bag opener to initially break and loosen the fibers. The initially loosened fibers are sent to the coarse opener. The coarsely opened fibers are transported to the mixing bin for full mixing. The mixed fibers are sent to the fine opener for further refinement and loosening to obtain fluffy and dispersed fibers. The finely opened fibers are sent to the carding machine, and the fibers are dispersed and arranged in parallel by the carding needles. The carded fibers are evenly laid into the initial pre-layer by the web laying machine;

[0049] S3 buffer layer preparation: polyurethane fiber is selected as the buffer layer material, and the polyurethane fiber is evenly laid on the surface of the primary pre-layer to form a buffer layer, and then the buffer layer and the primary pre-layer are pressed together by a pressing roller so that the buffer layer and the primary pre-layer are closely attached;

[0050] S4 high-density layer preparation: On the basis of the buffer layer, asphalt-based carbon fiber is added and needle-punched by a needle-punching device. After multiple needle-punching treatments, the fiber is repeatedly punctured and pulled, tightly combined with the buffer layer to form a tight three-dimensional mesh structure, thus forming a high-density layer;

[0051] S5 heat sealing layer preparation: Asphalt-based carbon fibers are added again on the lower surface of the high-density layer, and the fibers are heat-melted by a heat sealing machine to form a stable bond to form a heat sealing layer, and the heat sealing temperature is 200°C to 300°C, and the heat sealing time is 3s to 10s;

[0052] S6 needle punched felt forming: the initial pre-layer, high-density layer and heat-sealing layer are processed by four composite processes through the main needle punching machine and the counter needle punching machine to ensure the close combination of each layer. The needle punching process parameters are adjusted to achieve the required breaking strength, elongation, thickness, density and gram weight requirements. After calendering and ironing, carbon fiber needle punched felt can be obtained.

[0053] like Figures 3 to 9As shown, the needling device in the preparation of the S4 high-density layer includes a bottom plate 1, the upper surface of the bottom plate 1 is rotatably connected to a winding roller 2, one side of the winding roller 2 is provided with a needling mechanism, the needling mechanism is used to perform a needling operation on the carbon fiber felt, the needling mechanism includes a needling frame 3 fixedly connected to the upper surface of the bottom plate 1, a slide bar 4 is symmetrically slidably provided on the inner upper surface of the needling frame 3, one end of the slide bar 4 is fixedly connected to a moving plate 42, the inside of the moving plate 42 is slidably connected to a mounting plate 5, the lower surface of the mounting plate 5 is symmetrically fixedly connected to a plurality of mounting blocks 51, each of the mounting blocks 51 has a plurality of mounting blocks 51 disposed inside. A first plug rod 512 is symmetrically and slidably arranged, a connecting frame 6 is slidably connected to the surface of each mounting block 51, a needle 61 is slidably arranged on the inner lower surface of each connecting frame 6, a first plug hole is symmetrically opened on the inner side wall of each connecting frame 6, an extrusion block 62 is slidably connected inside the first plug hole, a fixing frame 52 is fixedly connected to both ends of the lower surface of the mounting plate 5, a moving frame 523 is symmetrically and slidably connected inside the fixing frame 52, a supporting plate 8 is symmetrically and fixedly arranged on the inner wall of the acupuncture frame 3, a feeding roller 21 is rotatably arranged on the upper surface of the bottom plate 1 and located on one side of the acupuncture frame 3.

[0054] like Fig. 9 As shown, the size of the first plug rod 512 matches the size of the first plug hole, and a second spring 511 is fixedly connected to one side of the first plug rod 512 .

[0055] like Fig. 9 As shown, the extrusion block 62 is slidably connected to an extrusion rod 624, the surface of the extrusion rod 624 is fixedly connected to a cone block 626, the surface of the cone block 626 is symmetrically slidably connected to a second plug rod 622, the surface of each second plug rod 622 is slidably connected to a plug bracket 621, each of the plug brackets 621 is fixedly connected to the interior of the extrusion block 62, the two sides of the connecting frame 6 are symmetrically fixedly connected to a second limit frame 63, the interior of the second limit frame 63 is provided with a second plug hole 631, and the size of the second plug rod 622 matches the size of the second plug rod 622.

[0056] like Fig.12 As shown, a plurality of connection blocks 54 are fixedly connected inside the movable frame 523 , and a movable rod 541 is slidably connected inside each of the connection blocks 54 .

[0057] like Fig. 9 As shown, a fourth spring 623 is fixedly connected between the surface of the first insertion rod 512 and the inner wall of the insertion frame 621, a fifth spring 627 is fixedly connected between one end of the extrusion rod 624 and the inner wall of the extrusion block 62, and a ball 625 is rotatably connected to one end of each extrusion rod 624.

[0058] Specifically, in the prior art, when installing the needle 61, a hammer or other tool is usually used to hammer the needle 61 into the mounting plate 5. When the needle 61 is damaged, the mounting plate 5 needs to be disassembled, and then the needle 61 is hammered out or pulled out with a special tool, and then a new needle 61 is replaced and then installed inside the acupuncture machine;

[0059] When the above-mentioned prior art is used, the damaged needles 61 need to be disassembled one by one, which takes a lot of time and effort, resulting in increased equipment downtime, thereby reducing the processing efficiency of the carbon fiber felt.

[0060] The working principle is as follows: the combed pre-oxidized silk fiber web is fed into the space between the supporting plates 8 inside the needling frame 3 through the feeding roller 21, and the slide bar 4 is driven to slide back and forth inside the needling frame 3, the slide bar 4 drives the moving plate 42 to move back and forth, the moving plate 42 drives the mounting plate 5 to move back and forth, the mounting plate 5 drives the connecting frame 6 on its surface to move synchronously, the connecting frame 6 drives the needles 61 inside it to move back and forth, the needles 61 slide in the internal holes of the supporting plate 8, and the needles 61 penetrate and hook the pre-oxidized silk fiber web for multiple times, so that the pre-oxidized silk fiber web further forms a felt-like structure, and then the winding roller 2 is driven to rotate, and the carbon fiber felt is wound up by the winding roller 2;

[0061] When all the needles 61 are damaged and need to be replaced, the moving frame 523 is driven to move, and the moving frame 523 drives the connecting block 54 to move synchronously. The connecting block 54 drives the moving rod 541 to contact one end of the squeezing rod 624. As the moving rod 541 squeezes the squeezing rod 624, the squeezing rod 624 slides toward the inside of the squeezing block 62. The squeezing rod 624 drives the cone block 626 to slide synchronously, so that the second insertion rod 622 slides toward the inside of the insertion frame 621 through the fourth spring 623. At this time, the second insertion rod 622 is separated from the second insertion hole inside the second limiting frame 63. 631, so that the limit between the squeezing block 62 and the second limit frame 63 is released, as the moving frame 523 squeezes the squeezing rod 624, the squeezing rod 624 squeezes the fifth spring 627 and pushes the squeezing block 62 to move, the squeezing block 62 is forced to slide in the first slot, and pushes the first insertion rod 512 to slide in the first slot, so that the first insertion rod 512 is separated from the first slot, at this time, the fixation between the mounting block 51 and the connecting frame 6 is released, so that the connecting frame 6 falls on the supporting plate 8 by gravity, and at this time, the puncture needle 61 inside the connecting frame 6 can be taken out for replacement;

[0062] When installation is required, the connecting frame 6 is aligned with the mounting block 51, and the connecting frame 6 is driven to move upward, and the inclined grooves on both sides of the connecting frame 6 squeeze the first insertion rod 512, so that the first insertion rod 512 is stored inside the mounting block 51. When one end of the mounting block 51 fits with one end of the puncture needle 61, the first insertion rod 512 enters the first insertion hole through the first spring 43, and the puncture needle 61 can be replaced;

[0063] The device can dismantle all the needles 61 at one time when all the needles are damaged, avoiding the tedious process of dismantling each needle 61 one by one, and significantly improving the efficiency of replacing the needles 61.

[0064] like Figure 3 As shown, a transmission frame 7 is fixedly connected to the upper surface of the acupuncture frame 3, a motor 71 is fixedly connected to one side of the transmission frame 7, a transmission rod is fixedly connected to the output end of the motor 71, a cam 72 is symmetrically fixedly connected to the surface of the transmission rod, a connecting plate 41 is fixedly connected to one end of the slide bar 4, and the upper surface of the connecting plate 41 is in contact with the circumferential surface of the cam 72, and a first spring 43 is fixedly connected between the upper surface of the movable plate 42 and the inner upper surface of the acupuncture frame 3.

[0065] Specifically, the motor 71 is turned on, the motor 71 drives the transmission rod to rotate, the transmission rod drives the cam 72 to rotate, the cam 72 squeezes the connecting plate 41, so that the connecting plate 41 drives the sliding rod 4 to slide downward and squeeze the first spring 43, the sliding rod 4 drives the movable plate 42 to descend, the movable plate 42 drives the mounting plate 5 to descend, the mounting plate 5 drives the needle 61 inside the connecting frame 6 to descend, the needle 61 descends to penetrate and hook the pre-oxidized silk fiber web, as the cam 72 continues to rotate, the first spring 43 drives the sliding rod 4 to reset, the sliding rod 4 drives the connecting plate 41 to rise, the connecting plate 41 keeps in contact with the surface of the cam 72, and the needle 61 can be driven to reciprocate up and down to penetrate and hook the pre-oxidized silk fiber web multiple times.

[0066] like Figures 3 to 5 As shown, the upper surface of the mounting plate 5 is symmetrically fixedly connected with a positioning rod 56, the surface of the positioning rod 56 is slidingly connected to the inside of the movable plate 42, the upper surface of the mounting plate 5 is threadedly connected with a first screw rod 44, one end of the first screw rod 44 is rotationally connected to the inside of the movable plate 42, the lower surface of the movable plate 42 is symmetrically fixedly connected with a telescopic rod 45, and the movable end of the telescopic rod 45 is fixedly connected to the upper surface of the mounting plate 5.

[0067] Specifically, the first screw rod 44 is rotated, and the first screw rod 44 drives the mounting plate 5 to move downward. The mounting plate 5 is limited by the positioning rod 56 and slides downward. When the mounting plate 5 slides downward, the movable end of the telescopic rod 45 is pulled downward to slide, so that the overall height of the acupuncture can be adjusted to meet the needs of different acupuncture thicknesses.

[0068] like Figure 6 and Fig.11 As shown, each of the fixed frames 52 is internally rotatably connected to a bidirectional screw rod 521, one end of the two movable frames 523 is threadedly connected to the two ends of the bidirectional screw rod 521, one end of each of the bidirectional screw rods 521 is fixedly connected to a worm gear 522, and the lower surface of the mounting plate 5 is fixedly connected to a fixed disk 533, the internal rotation of the fixed disk 533 is connected to a worm 53, and the worm 53 and the worm gear 522 are meshed with each other, and one side of the fixed disk 533 is provided with a plurality of fixing holes 534, one of the fixing holes 534 is internally slidably connected to a screw rod 532, one end of the screw rod 532 is threadedly connected to a turntable 531, and one side of the turntable 531 is fixedly connected to one end of the worm 53.

[0069] Specifically, when it is necessary to drive the movable frame 523 to move, the rotating screw 532 is pulled out from the fixing hole 534 to release the limit between the turntable 531 and the fixed plate 533. The rotating turntable 531 drives the worm 53 to rotate, and the worm 53 and the worm wheel 522 are engaged, so that the worm wheel 522 rotates and drives the bidirectional screw 521 inside it to rotate synchronously. The bidirectional screw 521 drives the two movable frames 523 to approach each other, and the movable frame 523 can squeeze the squeezing rod 624, thereby facilitating the disassembly and replacement operation of the acupuncture.

[0070] like Figures 10 to 14 As shown, the surface of the moving rod 541 is symmetrically fixedly connected with the first limit frame 542, the interior of the first limit frame 542 is provided with a slide groove 543, the interior of the slide groove 543 is slidably connected with a slider 545, one end of each slider 545 is fixedly connected with a gear 544, the gear 544 is rotatably connected to the interior of the connecting block 54, the interior of the connecting block 54 is rotatably connected with a gear column 546, and the gear column 546 and the gear 544 are meshed with each other.

[0071] like Fig.10 and Fig.15 As shown, one end of the tooth column 546 is fixedly connected to a positioning plate 547, and the interior of the positioning plate 547 is slidably connected to a limiting rod 548, and the surface of the limiting rod 548 and the lower surface of the positioning plate 547 are fixedly connected with a third spring 549, and one end of the tooth column 546 is rotatably connected to the limiting plate 55 at the bottom side of the positioning plate 547, and the limiting plate 55 is fixedly connected to the upper surface of the connecting block 54, and a first limiting groove 551 is arranged inside the limiting plate 55, an initial groove 552 is arranged on one side of the first limiting groove 551, and a second limiting groove 553 is arranged on one side of the initial groove 552, and the initial groove 552 and the second limiting block are both opened inside the limiting plate 55.

[0072] Specifically, the above embodiment can quickly replace the needles 61 when all of them are damaged, but the damage of the needles 61 is divided into the following situations: situation 1: when the damaged needles 61 are more than the undamaged needles 61; situation 2: when the damaged needles 61 are less than the undamaged needles 61; situation 3: the number of damaged needles 61 and the number of undamaged needles 61 are the same;

[0073] When the above situation occurs, the user removes all the needles 61, so the undamaged needles 61 need to be reinstalled later, which increases the replacement time and delays the normal use of the device, resulting in a decrease in the needle punching efficiency, thereby causing the problem of reduced carbon fiber felt processing efficiency;

[0074] In this embodiment, the initial position of the limiting rod 548 is in the initial groove 552 , and both sides of the moving rod 541 and both sides of the connecting block 54 are located on the same plane.

[0075] In order to solve the above problem, this embodiment is as follows: when the number of damaged needles 61 is greater than that of undamaged needles 61, the connecting block 54 at the corresponding position of the undamaged needles 61 is found, the limiting rod 548 is pulled out from the initial groove 552 and the third spring 549 is squeezed, the limiting rod 548 drives the positioning plate 547 to rotate, the positioning plate 547 drives the limiting rod 548 to rotate to the first limiting groove 551, and the limiting rod 548 is reset by the third spring 549, so that the limiting rod 548 is fixed in the first limiting groove 551, at this time, the positioning plate 547 drives the tooth column 546 to rotate, the tooth column 546 and the gear 544 are meshed, so that the gear 544 drives the slider 545 to rotate, the slider 545 moves in the slide groove 543, and drives the first limiting frame 542 to slide. When the first limiting frame 542 moves, the moving rod 541 slides toward the inner side of the connecting block 54, so that a gap is formed on one side of the connecting block 54, so that the distance between the moving rod 541 and the squeezing rod 624 at the undamaged thorn needle 61 becomes larger. When the moving frame 523 drives all the connecting blocks 54 to move, the squeezing rod 624 of the thorn needle 61 at the damaged part is squeezed by the moving rod 541, so that the moving frame 523 and the thorn needle 61 at the damaged part fall off, and the squeezing rod 624 at the undamaged part moves to the inside of the gap and is not squeezed by the squeezing rod 624. Therefore, the moving frame 523 at the undamaged thorn needle 61 will not fall off, and then it can be reinstalled. After the installation is completed, each structure can be driven to reset.

[0076] When the number of damaged needles 61 is less than that of undamaged needles 61, the connecting block 54 at the corresponding position of the damaged part is found, and the limiting rod 548 is pulled out from the initial groove 552, so that the limiting rod 548 rotates to the second limiting groove 553, and the limiting rod 548 is driven to be fixed in the second limiting groove 553 by the third spring 549. At this time, the tooth column 546 and the gear 544 are meshed, so that the gear 544 drives the slider 545 to move, and the slider 545 slides in the slide groove 543 and drives the first limiting frame 542 to slide, and the first limiting frame 542 drives the moving rod 541 to the connecting block 54. The outer side slides, so that one end of the moving rod 541 is located outside the connecting block 54, so that the distance between the moving rod 541 and the squeezing rod 624 at the damaged needle 61 becomes smaller. When the moving frame 523 drives all the connecting blocks 54 to move, the squeezing rod 624 at the damaged needle 61 will be squeezed by the moving rod 541 in advance. As the moving rod 541 squeezes the squeezing rod 624, the damaged needle 61 driven by the subsequent connecting frame 6 falls off. At the same time, the squeezing rod 624 at the undamaged needle 61 does not contact the moving rod 541, so the problem of falling does not occur.

[0077] When only one thorn needle 61 is damaged, the disassembly operation can be achieved by manually pressing the squeezing rod 624;

[0078] In this embodiment, the number of movable rods 541 can be adjusted according to the number of damaged needles 61 while keeping it to a minimum, thereby achieving fast and effective disassembly.

[0079] Working principle: the combed pre-oxidized silk fiber web is fed into the space between the supporting plates 8 inside the needle punching frame 3 through the feeding roller 21, and the motor 71 is turned on. The motor 71 drives the transmission rod to rotate, and the transmission rod drives the cam 72 to rotate. The cam 72 squeezes the connecting plate 41, so that the connecting plate 41 drives the sliding rod 4 to slide downward and squeeze the first spring 43, and the sliding rod 4 drives the moving plate 42 to reciprocate up and down, and the moving plate 42 drives the mounting plate 5 to reciprocate up and down, and the mounting plate 5 drives the connecting frame 6 on its surface to move synchronously, and the connecting frame 6 drives the needles 61 inside it to reciprocate up and down, and the needles 61 slide in the internal holes of the supporting plate 8, and the needles 61 penetrate and hook the pre-oxidized silk fiber web for multiple times, so that the pre-oxidized silk fiber web further forms a felt-like structure, and then drives the winding roller 2 to rotate, and the carbon fiber felt is wound up by the winding roller 2;

[0080] When all the needles 61 are damaged and need to be replaced, the moving frame 523 is driven to move, and the moving frame 523 drives the connecting block 54 to move synchronously. The connecting block 54 drives the moving rod 541 to contact one end of the squeezing rod 624. As the moving rod 541 squeezes the squeezing rod 624, the squeezing rod 624 slides toward the inside of the squeezing block 62. The squeezing rod 624 drives the cone block 626 to slide synchronously, so that the second insertion rod 622 slides toward the inside of the insertion frame 621 through the fourth spring 623. At this time, the second insertion rod 622 is separated from the second insertion hole inside the second limiting frame 63. 631, so that the limit between the squeezing block 62 and the second limit frame 63 is released, as the moving frame 523 squeezes the squeezing rod 624, the squeezing rod 624 squeezes the fifth spring 627 and pushes the squeezing block 62 to move, the squeezing block 62 is forced to slide in the first slot, and pushes the first insertion rod 512 to slide in the first slot, so that the first insertion rod 512 is separated from the first slot, at this time, the fixation between the mounting block 51 and the connecting frame 6 is released, so that the connecting frame 6 falls on the supporting plate 8 by gravity, and at this time, the puncture needle 61 inside the connecting frame 6 can be taken out for replacement;

[0081] When the damaged needles 61 are more than the undamaged needles 61, the connecting block 54 at the corresponding position of the undamaged needles 61 is found, the limiting rod 548 is pulled out from the initial groove 552 and the third spring 549 is squeezed, the limiting rod 548 drives the positioning plate 547 to rotate, the positioning plate 547 drives the limiting rod 548 to rotate to the first limiting groove 551, and the third spring 549 is reset, so that the limiting rod 548 is fixed in the first limiting groove 551, and the positioning plate 547 drives the tooth column 546 to rotate, the tooth column 546 and the gear 544 are meshed, so that the gear 544 drives the slider 545 to rotate, the slider 545 moves in the slide groove 543, and drives the first limiting frame 542 to slide, and the first limiting frame 542 is reset. The frame 542 drives the moving rod 541 to slide toward the inner side of the connecting block 54, so that a gap is formed on one side of the connecting block 54, so that the distance between the moving rod 541 and the squeezing rod 624 at the undamaged thorn needle 61 becomes larger. When the moving frame 523 drives all the connecting blocks 54 to move, the squeezing rod 624 of the thorn needle 61 at the damaged part is squeezed by the moving rod 541, so that the moving frame 523 and the thorn needle 61 at the damaged part fall off, and the squeezing rod 624 at the undamaged part moves to the inside of the gap and is not squeezed by the squeezing rod 624. Therefore, the moving frame 523 at the undamaged thorn needle 61 will not fall off, and it can be reinstalled. After the installation is completed, each structure can be driven to reset.

[0082] When the number of damaged needles 61 is less than that of undamaged needles 61, the connecting block 54 at the corresponding position of the damaged part is found, and the limiting rod 548 is pulled out from the initial groove 552, so that the limiting rod 548 rotates to the second limiting groove 553, and the limiting rod 548 is driven to be fixed in the second limiting groove 553 by the third spring 549. At this time, the tooth column 546 and the gear 544 are meshed, so that the gear 544 drives the slider 545 to move, and the slider 545 slides in the slide groove 543 and drives the first limiting frame 542 to slide, and the first limiting frame 542 drives the moving rod 541 to the connecting block 54. The outer side slides, so that one end of the moving rod 541 is located outside the connecting block 54, so that the distance between the moving rod 541 and the squeezing rod 624 at the damaged needle 61 becomes smaller. When the moving frame 523 drives all the connecting blocks 54 to move, the squeezing rod 624 at the damaged needle 61 will be squeezed by the moving rod 541 in advance. As the moving rod 541 squeezes the squeezing rod 624, the damaged needle 61 driven by the subsequent connecting frame 6 falls off. At the same time, the squeezing rod 624 at the undamaged needle 61 does not contact the moving rod 541, so the problem of falling does not occur.

[0083] When only one thorn needle 61 is damaged, the disassembly operation can be achieved by manually pressing the squeezing rod 624;

[0084] When installation is required, the connecting frame 6 is aligned with the mounting block 51 and the connecting frame 6 is driven to move upward. The inclined grooves on both sides of the connecting frame 6 squeeze the first insertion rod 512 so that the first insertion rod 512 is stored inside the mounting block 51. When one end of the mounting block 51 fits with one end of the puncture needle 61, the first insertion rod 512 enters the first insertion hole through the first spring 43, and the puncture needle 61 can be replaced.

[0085] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for preparing a carbon fiber needle felt, characterized in that: include S1 Raw material preparation: Select asphalt-based carbon fiber of qualified quality as raw material, and wash and dry the asphalt-based carbon fiber; S2 Preparation of the initial pre-layer: The raw materials are put into the bag opener, the fibers that are initially opened are sent to the coarse opener, the fibers that are roughly opened are sent to the mixing bin, the mixed fibers enter the fine opener, the finely opened fibers are sent to the carding machine, and the carded fibers are evenly laid into the initial pre-layer by the web laying machine; S3 buffer layer preparation: polyurethane fiber is selected as the buffer layer material, and the polyurethane fiber is evenly laid on the surface of the primary pre-layer to form a buffer layer, and then the buffer layer and the primary pre-layer are pressed together by a pressing roller; S4 high-density layer preparation: On the basis of the buffer layer, asphalt-based carbon fiber is added and needle-punched by a needle-punching device, and then needle-punched by the needle-punching device for multiple times to form a high-density layer; The needling device comprises a bottom plate, the upper surface of the bottom plate is rotatably connected with a winding roller, one side of the winding roller is provided with a needling mechanism, the needling mechanism is used for needling the carbon fiber felt, the needling mechanism comprises a needling frame fixedly connected to the upper surface of the bottom plate, a sliding rod is symmetrically slidably provided on the inner upper surface of the needling frame, one end of the sliding rod is fixedly connected with a moving plate, a mounting plate is slidably connected inside the moving plate, a plurality of mounting blocks are symmetrically fixedly connected on the lower surface of the mounting plate, a first plug rod is symmetrically slidably provided inside each of the mounting blocks, a connecting frame is slidably connected on the surface of each of the mounting blocks, a needle is slidably provided on the inner lower surface of each of the connecting frames, a first plug hole is symmetrically provided on the inner side wall of each of the connecting frames, an extrusion block is slidably connected inside the first plug hole, a fixing frame is fixedly connected at both ends of the lower surface of the mounting plate, a moving frame is symmetrically slidably connected inside the fixing frame, a supporting plate is symmetrically fixedly provided on the inner wall of the needling frame, a feeding roller is rotatably provided on the upper surface of the bottom plate and located on one side of the needling frame; S5 heat sealing layer preparation: on the lower surface of the high-density layer, asphalt-based carbon fiber is added again, and heat-melted by a heat sealing machine to form a heat sealing layer, and the heat sealing temperature is 200°C to 300°C, and the heat sealing time is 3s to 10s; S6 needle felt forming: the initial pre-layer, high-density layer and heat-sealing layer are processed by the main needle-punching machine and the counter needle-punching machine through four composite processes, and then calendered and ironed to obtain carbon fiber needle felt.

2. The method for preparing a carbon fiber needle felt according to claim 1, characterized in that: The upper surface of the acupuncture frame is fixedly connected to a transmission frame, one side of the transmission frame is fixedly connected to a motor, the output end of the motor is fixedly connected to a transmission rod, the surface of the transmission rod is symmetrically fixedly connected to a cam, one end of the sliding rod is fixedly connected to a connecting plate, and the upper surface of the connecting plate and the circumferential surface of the cam are in contact, and a first spring is fixedly connected between the upper surface of the moving plate and the inner upper surface of the acupuncture frame.

3. The method for preparing a carbon fiber needle felt according to claim 2, characterized in that: The upper surface of the mounting plate is symmetrically fixedly connected with a positioning rod, the surface of the positioning rod is slidingly connected to the inside of the movable plate, the upper surface of the mounting plate is threadedly connected with a first screw rod, one end of the first screw rod is rotationally connected to the inside of the movable plate, the lower surface of the movable plate is symmetrically fixedly connected with a telescopic rod, the movable end of the telescopic rod is fixedly connected to the upper surface of the mounting plate.

4. The method for preparing a carbon fiber needle felt according to claim 3, characterized in that: Each of the fixed frames is internally rotatably connected with a bidirectional screw rod, one end of the two moving frames is threadedly connected to the two ends of the bidirectional screw rod, one end of each bidirectional screw rod is fixedly connected to a worm gear, the lower surface of the mounting plate is fixedly connected to a fixed disk, the internal rotatable connection of the fixed disk is connected to a worm gear, and the worm gear and the worm gear are meshed with each other, a plurality of fixing holes are provided on one side of the fixed disk, one of the fixing holes is internally slidably connected with a screw rod, one end of the screw rod is threadedly connected to a rotating disk, one side of the rotating disk is fixedly connected to one end of the worm gear, the size of the first plug rod matches the size of the first plug hole, and one side of the first plug rod is fixedly connected to a second spring.

5. The method for preparing a carbon fiber needle felt according to claim 4, characterized in that: The extrusion block is slidably connected to an extrusion rod, a cone block is fixedly connected to the surface of the extrusion rod, a second plug rod is symmetrically slidably connected to the surface of the cone block, a plug rack is slidably connected to the surface of each second plug rod, each plug rack is fixedly connected to the interior of the extrusion block, second limiting frames are symmetrically fixedly connected to the two sides of the connecting frame, a second plug hole is opened in the interior of the second limiting frame, and the size of the second plug rod matches the size of the second plug rod.

6. The method for preparing a carbon fiber needle felt according to claim 5, characterized in that: A fourth spring is fixedly connected between the surface of the first insertion rod and the inner wall of the insertion frame, a fifth spring is fixedly connected between one end of the extrusion rod and the inner wall of the extrusion block, and a ball is rotatably connected to one end of each extrusion rod.

7. The method for preparing a carbon fiber needle felt according to claim 6, characterized in that: The movable frame is fixedly connected with a plurality of connecting blocks inside, each of the connecting blocks is slidably connected with a movable rod inside, the surface of the movable rod is symmetrically fixedly connected with a first limiting frame, the first limiting frame is provided with a slide groove inside, the slide groove is slidably connected with a slider inside, one end of each slider is fixedly connected with a gear, the gear is rotatably connected to the inside of the connecting block, the connecting blocks are rotatably connected with a gear column inside, and the gear column and the gear are meshed with each other.

8. The method for preparing a carbon fiber needle felt according to claim 7, characterized in that: One end of the tooth column is fixedly connected to a positioning plate, and the internal sliding connection of the positioning plate is connected to a limiting rod, and the surface of the limiting rod and the lower surface of the positioning plate are fixedly connected to a third spring, one end of the tooth column is located at the bottom side of the positioning plate and is rotatably connected to the limiting plate, and the upper surface of the limiting plate and the connecting block are fixedly connected, and a first limiting groove is provided inside the limiting plate, an initial groove is provided on one side of the first limiting groove, and a second limiting groove is provided on one side of the initial groove, and the initial groove and the second limiting block are both opened inside the limiting plate.

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