A device for preparing multiple bundles of long fiber twisted filaments for 3D printing

Abstract

The present invention relates to a device for preparing a multi-bundle long fiber twisted wire material for 3D printing, comprising a main optical axis and a driving device, a through-hole slip ring conductive ring, a pay-off device, a single-bundle twisting device, and a rotating device sequentially arranged on the main optical axis, and further comprising a supporting device, a take-up device, an extruding device, and a centering device, wherein the supporting device is arranged below the rotating device. The present invention can complete the entire process of releasing the fiber, twisting a single-bundle fiber, composite twisting of multiple-bundle fibers, wrapping the outer layer of the twisted fiber, and making the wire material, and realizes single-bundle twisting of fibers of different materials and then composite twisting of multiple bundles, and the replacement operation of the fiber material is convenient, and composite twisting of up to six bundles of fibers can be realized. 3D printing wire materials composed of different fiber materials, having different coating base materials, and having different numbers of twisting turns can be prepared, effectively enriching the characteristics of the 3D printing wire materials. The present invention is used in the field of 3D printing wire material preparation and application.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a device for preparing multi-bundle long fiber twisted filaments for 3D printing. Background Art

[0002] 3D printing technology, also known as additive manufacturing, is a type of rapid prototyping technology. It is a cutting-edge technology that integrates materials, hydraulics, computers, optoelectronics and other aspects. It can easily manufacture complex components and is increasingly widely used. As the requirements for product performance gradually increase, higher requirements are also placed on the performance of the filaments used in 3D printing. It is urgent to develop filaments with better performance.

[0003] Currently, most filaments used in 3D printing are composed of single, unprocessed fibers. Compared to substrates such as resin, plastic, rubber, and silicone, the resulting filaments exhibit minimal mechanical performance improvements, failing to meet the high-performance demands of engineering components. Therefore, a device for preparing multi-bundle, twisted long-fiber filaments for 3D printing is needed to achieve twisting of multiple fiber bundles and effectively improve the overall mechanical properties of the resulting fiber-composite filaments, addressing these issues. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the above-mentioned background technology and to provide a device for preparing multiple bundles of long fiber twisted filaments for 3D printing.

[0005] A device for preparing multiple bundles of long fiber twisted filaments for 3D printing, comprising a main optical axis, a driving device, a through-hole slip ring conductive ring, a pay-off device, a single-bundle twisting device, a rotating device, a supporting device, a take-up device, an extruding device and a centering device, wherein the main optical axis is arranged on the driving device, the through-hole slip ring conductive ring, the pay-off device, the single-bundle twisting device and the rotating device are arranged on the main optical axis in sequence, the supporting device is arranged below the rotating device, the take-up device is arranged at the rear side of the rotating device, the extruding device is arranged at the rear side of the take-up device, and the centering device is arranged at the rear side of the extruding device.

[0006] The driving device includes a driving bracket, a first bearing seat, a reduction motor, a small cylindrical gear, and a large cylindrical gear. The reduction motor is fixed on the driving bracket. The speed of the reduction motor affects the speed of the main optical axis. The speed range of the main optical axis is 0~180 rpm, that is, the number of turns of the multi-bundle fiber composite twisting is in the range of 0~180 rpm. The first bearing seat is fixed on both sides of the top of the driving bracket. The small cylindrical gear is connected to the output shaft of the reduction motor. The large cylindrical gear is meshed with the small cylindrical gear, and is coaxially sleeved on the main optical axis with the two first bearing seats and fixed to the main optical axis.

[0007] The pay-off device includes a fiber center fixing frame, a fiber optical axis fixing frame, a first horizontal optical axis seat, an optical axis, an ultra-thin bearing, a rotating fiber frame and a coil blocking seat. The fiber center fixing frame is connected to the flange optical axis seat by bolts and is fixed to the main optical axis. The fiber optical axis fixing frame is fixed to the fiber center fixing frame. The optical axis is fixed to the fiber center fixing frame by a threaded pair. The first horizontal optical axis seat is connected to the fiber optical axis fixing frame by bolts and is fixed to the optical axis. The rotating fiber frame is sleeved on the optical axis by an ultra-thin bearing. The fiber to be twisted is wound around the rotating fiber frame. The coil blocking seat is fixed to the end of the optical axis by bolts.

[0008] The single-bundle twisting device includes a central fixing frame, a first aluminum alloy block, a first claw-type connecting member and a rotating unit. The central fixing frame is connected to the flange optical axis seat by bolts and is fixed to the main optical axis. One end of the first aluminum alloy block is connected to the central fixing frame, and the other end is connected to the first claw-type connecting member. The left and right sides of the single-bundle twisting device are installed in the same manner, and the two ends of the rotating unit are respectively connected to the first claw-type connecting member on the left and the first claw-type connecting member on the right by bolts.

[0009] The rotating unit includes a stepper motor, a front bearing seat, a fixed front plate, an input end synchronous wheel, a synchronous belt, an output end synchronous wheel, a brass shaft, a front horizontal optical axis seat, a rotating optical axis seat gasket, a rotating optical axis seat fixed seat, a first dispensing needle, a rotating module rubber wheel fixed plate, a rubber wheel, a second dispensing needle, a rotating optical axis rear fixed seat, a rear horizontal optical axis seat, a brass driven shaft, a fixed rear plate and a rear bearing seat. The stepper motor is fixed on the fixed front plate, and its output shaft is connected to the input end synchronous wheel. The number of revolutions of the stepper motor is the number of twisting turns of a single bundle of fibers, ranging from 0 to 180 revolutions per minute. The front bearing seat is fixed on the fixed front plate, and the brass shaft is rotatably connected to the fixed front plate. The output end synchronous wheel is concentrically matched with the brass shaft and is connected to the input end synchronous wheel through a synchronous belt. The front horizontal optical axis seat, the rotating optical axis seat gasket and the rotating optical axis seat fixed seat are concentrically matched with the brass shaft respectively. The two wheels are tangent to each other, and the brass driven shaft and the brass rotating shaft are located on the same axis. One end is connected to the fixed seat of the rotating optical axis seat, and the other end is connected to the fixed seat behind the rotating optical axis seat. The rubber wheel is connected to the fixed plate of the rotating module rubber wheel by bolts. The two rubber wheels are tangent to each other. The brass driven shaft and the brass rotating shaft are located on the same axis. One end is connected to the fixed rear plate. The rear horizontal optical axis seat is concentrically matched with the brass driven shaft and is fixed to the fixed seat behind the rotating optical axis seat by bolts. The rear bearing seat is concentrically matched with the brass driven shaft and is fixed to the fixed rear plate by bolts. The fixed front plate and the fixed rear plate are fixed to the center fixing frame by bolts.

[0010] The rotating device includes a rotating center fixing frame, a second aluminum alloy block, a second claw-shaped connecting piece, a glass conduit fixing seat, a glass conduit, and a rotating wheel processing piece. The rotating center fixing frame is concentrically matched with the main optical axis and is fixed to the main optical axis via a flange optical axis seat. The second claw-shaped connecting piece is connected to the rotating center fixing frame via the second aluminum alloy block. The rotating wheel processing piece is connected to the second claw-shaped connecting piece via a bolt connection. The glass conduit fixing seat is disposed on the rotating wheel processing piece. The glass conduit is fixed to the glass conduit fixing seat via a rotating connection, with one end of the glass conduit being horizontal and the other end pointing toward the main optical axis.

[0011] The supporting device includes a runner outer plate connecting plate, a front rotating outer plate, a rear rotating outer plate and bearings. The runner outer plate connecting plate is placed on a horizontal plane. The front rotating outer plate and the rear rotating outer plate are respectively fixed on both sides of the runner outer plate connecting plate. The bearings are evenly distributed between the front rotating outer plate and the rear rotating outer plate.

[0012] The wire taking-up device comprises a funnel and a funnel bracket, and the funnel is fixed to the funnel bracket by bolt connection.

[0013] The centering device includes a centering device base, a first horizontal baffle, a horizontal long trapezoidal screw, a horizontal short trapezoidal screw, a trapezoidal screw matching nut, a second bearing seat, a rotating handle, a second horizontal optical axis seat, a linear bearing, a horizontal slide, a vertical long trapezoidal screw, a vertical short trapezoidal screw, a second horizontal baffle, a vertical slide, a connecting aluminum plate, a centering aluminum plate and a brass nozzle. The centering device base is placed on a horizontal plane, and the first horizontal baffle is arranged on both sides of the top of the centering device base. The horizontal long trapezoidal screw is connected to the first horizontal baffles on both sides through the second bearing seat, but one end passes through the first horizontal baffle on one side and is connected to the rotating handle. The trapezoidal screw matching nut is sleeved on the horizontal long trapezoidal screw, and the two ends of the horizontal short trapezoidal screw are fixed to the first horizontal baffles on both sides through the second horizontal optical axis seat, on which two linear bearings are distributed. The lower side of the horizontal slide is Bolt connection is fixed with trapezoidal screw matching nut and linear bearing. A second bearing seat and a second horizontal optical axis seat are arranged on the upper side of the horizontal slide. One end of the vertical long trapezoidal screw is fixed on the second bearing seat of the horizontal slide, and the other end is connected with a rotating handle. A trapezoidal screw matching nut is sleeved on the vertical long trapezoidal screw. One end of the vertical short trapezoidal screw is fixed on the second horizontal optical axis seat of the horizontal slide, and the other end is fixed on the second horizontal optical axis seat of the second horizontal baffle. A linear bearing is arranged on the screw through a bolt connection. The vertical slide is fixed by the trapezoidal screw matching nut and linear bearing. The connecting aluminum plate is fixed to the vertical slide by bolt connection. The centering aluminum plate is connected to the connecting aluminum plate by bolt connection. The brass nozzle is arranged on the centering aluminum plate. The diameter of the brass nozzle is related to the diameter of the extruded wire. The diameter range of the extruded wire is 1~4mm.

[0014] Beneficial effects of the present invention:

[0015] The beneficial effects of the present invention are as follows: the present invention realizes a preparation process of a multi-bundle long fiber twisted filament for 3D printing, which is simple to operate and easy to use. When the fiber bundle needs to be replaced, the rotating fiber rack can be replaced; the number of twisted fibers can be freely controlled, from single-bundle fiber twisting to six-bundle fiber composite twisting; single-bundle fiber twisting and multi-bundle fiber composite twisting can be performed at the same time; composite twisting can be performed on fibers of various different materials; in addition, by changing the coating substrate added to the extrusion device to coat different outer layers of the fibers, 3D printing filaments composed of different fiber materials, with different coating substrates and different numbers of twisting turns can be prepared, which provides an effective new idea for preparing new 3D printing wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the entirety of the present invention;

[0017] Figure 2 It is a schematic structural diagram of the driving device of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the pay-off device of the present invention;

[0019] Figure 4 It is a schematic structural diagram of a single bundle twisting device of the present invention;

[0020] Figure 5 It is a schematic structural diagram of the rotating monomer of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the rotating device of the present invention;

[0022] Figure 7 It is a schematic structural diagram of the support device of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the wire take-up device of the present invention;

[0024] Figure 9 It is a structural schematic diagram of the centering device of the present invention.

[0025] In the figure: 1, main optical axis; 2, driving device; 201, driving bracket; 202, first bearing seat; 203, reduction motor; 204, small cylindrical gear; 205, large cylindrical gear; 3, through-hole slip ring conductive ring; 4, pay-off device; 401, fiber center fixing frame; 402, fiber optical axis fixing frame; 403, first horizontal optical axis seat; 404, optical axis; 405, ultra-thin bearing; 406, rotating fiber frame; 407, coil blocking seat; 5, single bundle twisting device; 501, center fixing frame; 502, first aluminum alloy block; 503, first claw-type connecting piece; 504 , rotating unit; 50401, stepper motor; 50402, front bearing seat; 50403, fixed front plate; 50404, input end synchronous wheel; 50405, synchronous belt; 50406, output end synchronous wheel; 50407, brass shaft; 50408, front horizontal optical axis seat; 50409, rotating optical axis seat gasket, 50410, rotating optical axis seat fixed seat, 50411, first dispensing needle, 50412, rotating module rubber wheel fixing plate; 50413, rubber wheel; 50414, second dispensing needle; 50415, rotating optical axis rear fixed seat; 5041 6. Rear horizontal optical axis seat; 50417. Brass driven shaft; 50418. Fixed rear plate; 50419. Rear bearing seat; 6. Rotating device; 601. Rotating center fixing frame; 602. Second aluminum alloy block; 603. Second claw-type connecting piece; 604. Glass conduit fixing seat; 605. Glass conduit; 606. Rotor processing part; 7. Support device; 701. Rotor outer plate connecting plate; 702. Front rotating outer plate; 703. Rear rotating outer plate; 704. Bearing; 8. Take-up device; 801. Funnel; 802. Funnel bracket; 9. Extrusion device; 10. Centering device 1001, centering device base; 1002, first horizontal baffle; 1003, horizontal long trapezoidal screw; 1004, horizontal short trapezoidal screw; 1005, trapezoidal screw matching nut; 1006, second bearing seat; 1007, rotating handle; 1008, second horizontal optical axis seat; 1009, linear bearing; 1010, horizontal slide; 1011, vertical long trapezoidal screw; 1012, vertical short trapezoidal screw; 1013, second horizontal baffle; 1014, vertical slide; 1015, connecting aluminum plate; 1016, centering aluminum plate; 1017, brass nozzle. DETAILED DESCRIPTION

[0026] See also Figures 1 to 9As shown, a device for preparing multiple bundles of long fiber twisted filaments for 3D printing includes a main optical axis 1, a driving device 2, a through-hole slip ring conductive ring 3, a pay-off device 4, a single bundle twisting device 5, a rotating device 6, a supporting device 7, a take-up device 8, an extruding device 9 and a centering device 10. The main optical axis 1 is arranged on the driving device 2, the through-hole slip ring conductive ring 3, the pay-off device 4, the single bundle twisting device 5, and the rotating device 6 are arranged on the main optical axis 1 in sequence, the supporting device 7 is arranged below the rotating device 6, the take-up device 8 is arranged at the rear side of the rotating device 6, the extruding device 9 is arranged at the rear side of the take-up device 8, and the centering device 10 is arranged at the rear side of the extruding device 9;

[0027] Specifically, the driving device 2 is used to drive the entire main optical axis 1 to rotate; the wire-unwinding device 4 is used to place and release untwisted fibers; the single-bundle twisting device 5 is used to twist a single bundle of fibers; the rotating device 6 is used to compositely twist multiple bundles of fibers; the supporting device 7 is used to support the rotating device 6; the wire-rewinding device 8 is used to gather multiple bundles of fibers; the extrusion device 9 is used to complete the coating of the outer layer of the twisted fibers; the centering device 10 is used to adjust the diameter of the extruded wire material and make the fiber located in the center of the coated substrate.

[0028] Specifically, the extrusion device 9 is a wellzoom extruder, and the coating substrate is added into the wellzoom extruder, melted and extruded at the extrusion head to complete the coating of the outer layer of the twisted fiber. The materials used for coating include thermoplastic resin-based materials such as polyethylene, polyvinyl chloride, polystyrene, polyamide, polylactic acid, polyformaldehyde, polycarbonate, polyphenylene ether, polysulfone, etc., plastics, rubber, silicone, etc.

[0029] The driving device 2 includes a driving bracket 201, a first bearing seat 202, a reduction motor 203, a small cylindrical gear 204, and a large cylindrical gear 205. The reduction motor 203 is fixed on the driving bracket 201. The speed of the reduction motor 203 affects the speed of the main optical axis 1. The speed range of the main optical axis 1 is 0-180 rpm, that is, the number of turns of the multi-bundle fiber composite twisting is in the range of 0-180 rpm. The first bearing seat 202 is fixed on both sides of the top of the driving bracket 201. The small cylindrical gear 204 is connected to the output shaft of the reduction motor 203. The large cylindrical gear 205 is meshed with the small cylindrical gear 204 and is coaxially sleeved on the main optical axis 1 with the two first bearing seats 202, and is fixed to the main optical axis 1.

[0030] Specifically, the speed of the reduction motor 203 will affect the speed of the main optical axis 1. The gear transmission of the reduction motor 203 drives the main optical axis 1 to rotate, which can make the speed of the main optical axis 1 0~180 rpm, so that the number of turns of the multi-bundle fiber composite twisting ranges from 0~180 rpm.

[0031] The pay-off device 4 includes a fiber center fixing frame 401, a fiber optical axis fixing frame 402, a first horizontal optical axis seat 403, an optical axis 404, an ultra-thin bearing 405, a rotating fiber frame 406 and a coil blocking seat 407. The fiber center fixing frame 401 is connected to the flange optical axis seat by bolts and is fixed on the main optical axis 1. The fiber optical axis fixing frame 402 is fixed on the fiber center fixing frame 401. The optical axis 404 is fixed to the fiber center fixing frame 401 by a threaded pair. The first horizontal optical axis seat 403 is connected to the fiber optical axis fixing frame 402 by bolts and is fixed on the optical axis 404. The rotating fiber frame 406 is sleeved on the optical axis 404 through the ultra-thin bearing 405. The fiber to be twisted is wound around the rotating fiber frame 406. The coil blocking seat 407 is fixed to the end of the optical axis 404 by bolts.

[0032] Specifically, the fiber types include carbon fiber, aramid fiber, glass fiber, etc. The wire reel blocking seat 407 is detachable, and the fiber bundle is wound on the rotating fiber rack 406. When the fiber bundle is used up or needs to be replaced with a fiber bundle of other materials, it is only necessary to remove the wire reel blocking seat 407 and replace it with the rotating fiber rack 406 wound with new fibers.

[0033] The single-bundle twisting device 5 includes a central fixing frame 501, a first aluminum alloy block 502, a first claw-type connector 503 and a rotating unit 504. The central fixing frame 501 is connected to the flange optical axis seat by bolt connection and is fixed to the main optical axis 1. One end of the first aluminum alloy block 502 is connected to the central fixing frame 501, and the other end is connected to the first claw-type connector 503. The left and right sides of the single-bundle twisting device 5 are installed in the same way. The two ends of the rotating unit 504 are respectively connected to the first claw-type connector 503 on the left and the first claw-type connector 503 on the right by bolt connection.

[0034] The rotating unit 504 includes a stepper motor 50401, a front bearing seat 50402, a fixed front plate 50403, an input end synchronous wheel 50404, a synchronous belt 50405, an output end synchronous wheel 50406, a brass rotating shaft 50407, a front horizontal optical axis seat 50408, a rotating optical axis seat gasket 50409, a rotating optical axis seat fixed seat 50410, a first dispensing needle 50411, a rotating module rubber wheel fixed plate 50412, a rubber wheel 50413, a second dispensing needle 50414, a rotating optical axis rear fixed seat 50415, a rear horizontal optical axis seat 50416, a brass driven shaft 50417, a fixed rear plate 50418 and The rear bearing seat 50419, the stepper motor 50401 is fixed on the fixed front plate 50403, and its output shaft is connected to the input end synchronous wheel 50404. The number of revolutions of the stepper motor 50401 is the number of twisting turns of a single bundle of fibers, ranging from 0 to 180 revolutions per minute. The front bearing seat 50402 is fixed on the fixed front plate 50403, and the brass shaft 50407 is rotatably connected to the fixed front plate 50403. The output end synchronous wheel 50406 is concentrically matched with the brass shaft 50407 and is connected to the input end synchronous wheel 50404 through the synchronous belt 50405. The front horizontal optical axis seat 50408, the rotating optical axis seat gasket 50409 and the rotating optical axis seat are fixed. The fixed seats 50410 are respectively concentrically matched with the brass rotating shaft 50407 and are sequentially arranged on the brass rotating shaft 50407. The first dispensing needle 50411 is fixed on the rotating optical axis seat fixing seat 50410. The head of the first dispensing needle 50411 points to the direction of the rubber wheel 50413. The second dispensing needle 50414 is fixed to the rotating optical axis seat rear fixing seat 50415. The tail of the second dispensing needle 50414 points to the direction of the rubber wheel 50413. The rotating module rubber wheel fixing plate 50412 is connected and fixed to the rotating optical axis seat fixing seat 50410, and the other end is connected and fixed to the rotating optical axis seat rear fixing seat 50415. The rubber wheel 50413 It is connected to the rotating module rubber wheel fixing plate 50412 by bolt connection, and the two rubber wheels 50413 are tangent to each other. The brass driven shaft 50417 and the brass rotating shaft 50407 are located on the same axis, and one end is connected to the fixed rear plate 50418. The rear horizontal optical axis seat 50416 is concentrically matched with the brass driven shaft 50417 and fixed to the rear fixed seat 50415 of the rotating optical axis seat by bolt connection. The rear bearing seat 50419 is concentrically matched with the brass driven shaft 50417 and fixed to the fixed rear plate 50418 by bolt connection. The fixed front plate 50403 and the fixed rear plate 50418 are fixed to the central fixing frame 501 by bolt connection;

[0035] Specifically, the speed of the stepper motor 50401 drives the brass shaft 50407 to rotate through the synchronous belt to realize the twisting of a single bundle of fibers. The speed of the stepper motor 50401 affects the twist number of a single bundle of fibers. Each stepper motor 50401 is responsible for controlling the twisting of a single bundle of fibers and works independently to achieve precise control of the twist number.

[0036] The rotating device 6 includes a rotating center fixing frame 601, a second aluminum alloy block 602, a second claw-shaped connector 603, a glass conduit fixing seat 604, a glass conduit 605, and a rotating wheel processing member 606. The rotating center fixing frame 601 is concentrically matched with the main optical axis 1 and is fixed to the main optical axis 1 via a flange optical axis seat. The second claw-shaped connector 603 is connected to the rotating center fixing frame 601 via the second aluminum alloy block 602. The rotating wheel processing member 606 is connected to the second claw-shaped connector 603 via a bolt connection. The glass conduit fixing seat 604 is disposed on the rotating wheel processing member 606. The glass conduit 605 is fixed to the glass conduit fixing seat 604 via a rotating connection, with one end horizontal and the other end pointing toward the main optical axis 1.

[0037] The supporting device 7 includes a runner outer plate connecting plate 701, a front rotating outer plate 702, a rear rotating outer plate 703 and bearings 704. The runner outer plate connecting plate 701 is placed on a horizontal plane, the front rotating outer plate 702 and the rear rotating outer plate 703 are respectively fixed on both sides of the runner outer plate connecting plate 701, and the bearings 704 are evenly distributed between the front rotating outer plate 703 and the rear rotating outer plate 704.

[0038] Specifically, the presence of the bearing 704 on the supporting device 7 can effectively reduce the resistance of the rotating device 6 during the rotation process, so that the rotation speed of the rotating device 6 is closer to the designed rotation speed, and the precise control of the twist number is achieved.

[0039] The wire take-up device 8 includes a funnel 801 and a funnel bracket 802 , and the funnel 801 is fixed to the funnel bracket 802 by bolts.

[0040] Specifically, the multiple bundles of fibers are gathered into a single bundle of fibers by the funnel 801 at the take-up device 8, which can reduce the risk of fiber bundle breakage during the preparation process and improve the stability of the preparation process of 3D multi-bundle long fiber twisted filaments.

[0041] The centering device 10 includes a centering device base 1001, a first horizontal baffle 1002, a horizontal long trapezoidal screw 1003, a horizontal short trapezoidal screw 1004, a trapezoidal screw matching nut 1005, a second bearing seat 1006, a rotating handle 1007, a second horizontal optical axis seat, a linear bearing 1009, a horizontal slide 1010, a vertical long trapezoidal screw 1011, a vertical short trapezoidal screw 1012, a second horizontal baffle 1013, a vertical slide 1014, a connecting aluminum plate 1015, a centering aluminum plate 1016 and a brass nozzle 1017. The centering device base 1001 is a centering device base 1002, a first horizontal baffle 1002, a horizontal long trapezoidal screw 1003, a horizontal short trapezoidal screw 1004, a trapezoidal screw matching nut 1005, a second bearing seat 1006, a rotating handle 1007, a second horizontal optical axis seat, a linear bearing 1009, a horizontal slide 1010, a vertical long trapezoidal screw 1011, a vertical short trapezoidal screw 1012, a second horizontal baffle 1013, a vertical slide 1014, a connecting aluminum plate 1015, a centering aluminum plate 1016 and a brass nozzle 1017. 001 is placed on a horizontal surface, the first horizontal baffles 1002 are arranged on both sides of the top of the centering device base 1001, the horizontal long trapezoidal screw 1003 is connected to the first horizontal baffles 1002 on both sides through the second bearing seat 1006, but one end passes through the first horizontal baffle 1002 on one side and is connected to the rotating handle 1007, the trapezoidal screw matching nut 1005 is sleeved on the horizontal long trapezoidal screw 1003, and the two ends of the horizontal short trapezoidal screw 1004 are fixed to the first horizontal baffles 1002 on both sides through the second horizontal optical axis seat, and two linear bearings 1009 are distributed on it. The lower side of the horizontal slide 1010 is fixed with the trapezoidal screw matching nut 1005 and the linear bearing 1009 by bolt connection. A second bearing seat 1006 and a second horizontal optical axis seat are provided on the upper side of the horizontal slide 1010. One end of the vertical long trapezoidal screw 1011 is fixed to the second bearing seat 1006 of the horizontal slide 1010, and the other end is connected to a rotating handle 1007. The trapezoidal screw matching nut 1005 is sleeved on the vertical long trapezoidal screw 1011. One end of the vertical short trapezoidal screw 1012 is fixed to the second horizontal optical axis seat of the horizontal slide 1010, and the other end is connected to the rotating handle 1007. One end is fixed on the second horizontal optical axis seat of the second horizontal baffle 1013, and a linear bearing 1009 is provided on the screw through a bolt connection. The vertical slide 1014 is fixed by a trapezoidal screw with a matching nut 1005 and a linear bearing 1009. The connecting aluminum plate 1015 is fixed to the vertical slide 1014 through a bolt connection. The centering aluminum plate 1016 is connected to the connecting aluminum plate 1015 through a bolt connection. The brass nozzle 1017 is set on the centering aluminum plate 1016. The diameter of the brass nozzle 1017 is related to the diameter of the extruded wire, and the diameter range of the extruded wire is 1~4mm.

[0042] Specifically, by rotating the rotary handle 1007 connected to the horizontal long trapezoidal screw 1003, the front and rear positions of the fiber bundle in the coated substrate can be precisely controlled. By rotating the rotary handle 1007 connected to the vertical long trapezoidal screw 1011, the upper and lower positions of the fiber bundle in the coated substrate can be precisely controlled. The two cooperate to achieve the fiber bundle being located in the center of the coated substrate, making the prepared wire rod better. The working principle and process of the present invention are as follows:

[0043] See also Figures 1 to 9As shown, before the formal preparation of multiple bundles of long fiber twisted filaments for 3D printing, the fibers are wound on the rotating fiber rack 405. By pulling the fibers, the rotating fiber rack 405 is driven to rotate, thereby releasing the fibers. The fibers released from the pay-off device 4 enter the single-bundle twisting device 5, enter the brass rotating shaft 50407 from the side where the front bearing seat 50402 is located, pass through the head of the first dispensing needle 50411, pass through the tangent surface of the two rubber wheels 50413, and enter the brass driven shaft 50417 from the tail of the second dispensing needle 50414. The fibers coming out of the brass driven shaft 50417 enter from the horizontal end of the glass tube 605 of the rotating device 6 and come out from the end pointing to the main optical axis 1. The multiple bundles of fibers are gathered through the funnel 801 of the take-up device 8, pass through the extrusion device 9, and finally come out from the brass nozzle 1017 of the centering device 10.

[0044] After setting the speed of the stepper motor 50401 and starting it, its output shaft begins to rotate, driving the input-end synchronous wheel 50404 to rotate, and through the belt transmission of the synchronous belt 50405, the output-end synchronous wheel 50406 also rotates. The brass rotating shaft 50407 and the brass driven shaft 50417 rotate under the action of the output-end synchronous wheel 50406. At this time, one end of the single bundle of fibers is fixed on the rotating fiber rack 405, and the other end is fixed at the wellzoom extruder. With the rotation of the internal structure of the rotating monomer 504, the twisting of the single bundle of fibers is completed; after setting the rotation speed of the reduction motor 203, the reduction motor 203 drives the small cylindrical gear 204 to rotate, and the small cylindrical gear 204 then drives the large cylindrical gear 205 to rotate, and the large cylindrical gear 205 drives the main optical axis 1 to rotate, and the main optical axis 1 The fixed devices also rotate. One end of the multiple bundles of fibers that have completed single-bundle twisting at the single-bundle twisting device 5 is fixed at the extrusion device 9, and the other end is fixed at the wellzoom extruder. As the main optical axis 1 rotates, the composite twisting of multiple bundles of fibers is realized. The wellzoom extruder of the extrusion device 9 wraps the substrate for the outer layer of the fiber and finally extrudes it from the brass nozzle 1017. By rotating the rotating handle 1007 connected to the horizontal long trapezoidal screw 1003, the front and rear positions of the fiber bundle in the coated substrate can be finely controlled. By rotating the rotating handle 1007 connected to the vertical long trapezoidal screw 1011, the upper and lower positions of the fiber bundle in the coated substrate can be finely controlled. The two cooperate to realize that the fiber is located in the middle of the coated substrate, thereby completing the entire process of preparing multiple long-bundle fiber twisted filaments for 3D printing.

[0045] When the fiber bundle is used up or needs to be replaced with a fiber bundle of different material, it is only necessary to remove the coil blocking seat 407 and replace the rotating fiber rack 405.

[0046] When the twist number of a single fiber bundle needs to be changed, the speed of the stepper motor 50401 is changed, and the twist number of the single fiber bundle changes accordingly; when the twist number of multiple fiber bundles needs to be changed, the speed of the reduction motor 203 is changed, and the twist number of the multiple fiber bundles changes accordingly.

[0047] Although the present invention shows and describes specific implementation methods, those skilled in the art can make various changes, substitutions and modifications to these examples and design similar solutions without departing from the principles and spirit of the present invention. All embodiments that fall within the scope of the claims of the present invention belong to the scope of protection of the present invention.

Claims

1. A device for preparing multiple bundles of long fiber twisted filaments for 3D printing, characterized by: The invention comprises a main optical axis (1), a driving device (2), a through-hole slip ring conductive ring (3), a wire-releasing device (4), a single-bundle twisting device (5), a rotating device (6), a supporting device (7), a wire-receiving device (8), an extruding device (9) and a centering device (10), wherein the main optical axis (1) is arranged on the driving device (2), the through-hole slip ring conductive ring (3), the wire-releasing device (4), the single-bundle twisting device (5) and the rotating device (6) are arranged on the main optical axis (1) in sequence, the supporting device (7) is arranged below the rotating device (6), the wire-receiving device (8) is arranged at the rear side of the rotating device (6), the extruding device (9) is arranged at the rear side of the wire-receiving device (8), and the centering device (10) is arranged at the rear side of the extruding device (9); The single-bundle twisting device (5) comprises a central fixing frame (501), a first aluminum alloy block (502), a first claw-type connecting member (503) and a rotating unit (504); the central fixing frame (501) is connected to the flange optical axis seat by bolt connection and is fixed to the main optical axis (1); one end of the first aluminum alloy block (502) is connected to the central fixing frame (501), and the other end is connected to the first claw-type connecting member (503); the left and right sides of the single-bundle twisting device (5) are installed in the same manner; the two ends of the rotating unit (504) are connected to the left first claw-type connecting member (503) and the right first claw-type connecting member (503) respectively by bolt connection; The rotating unit (504) includes a stepper motor (50401), a front bearing seat (50402), a fixed front plate (50403), an input end synchronous wheel (50404), a synchronous belt (50405), an output end synchronous wheel (50406), a brass rotating shaft (50407), a front horizontal optical axis seat (50408), a rotating optical axis seat gasket (50409), a rotating optical axis seat fixing seat (50410), a first dispensing needle (50411), a rotating module rubber wheel fixing plate (50412), a rubber wheel (50413), a second dispensing needle (50414), a rotating optical axis rear fixing seat (50415), a rear horizontal optical axis seat (50416), a brass driven shaft (50417), a fixed rear plate ( 50418) and a rear bearing seat (50419), a stepper motor (50401) is fixed on a fixed front plate (50403), and its output shaft is connected to an input end synchronous wheel (50404). The number of revolutions of the stepper motor (50401) is the number of twisting turns of a single bundle of fibers, ranging from 0 to 180 revolutions per minute. The front bearing seat (50402) is fixed on the fixed front plate (50403), and a brass shaft (50407) is rotatably connected to the fixed front plate (50403). The output end synchronous wheel (50406) is concentrically matched with the brass shaft (50407) and is connected to the input end synchronous wheel (50404) through a synchronous belt (50405). The front horizontal optical axis seat (50408), the rotating optical axis seat gasket (50409) and the rotating The rotating optical axis seat fixing seat (50410) is concentrically matched with the brass rotating shaft (50407) and is sequentially arranged on the brass rotating shaft (50407). The first dispensing needle (50411) is fixed on the rotating optical axis seat fixing seat (50410). The head of the first dispensing needle (50411) points to the direction of the rubber wheel (50413). The second dispensing needle (50414) is fixed to the rotating optical axis seat rear fixing seat (50415). The tail of the second dispensing needle (50414) points to the direction of the rubber wheel (50413). The rotating module rubber wheel fixing plate (50412) is connected and fixed on the rotating optical axis seat fixing seat (50410). The other end is connected and fixed on the rotating optical axis seat rear fixing seat (50415). The rubber wheel (50 413) is connected to the rotating module rubber wheel fixing plate (50412) by bolt connection, the two rubber wheels (50413) are tangent to each other, the brass driven shaft (50417) and the brass rotating shaft (50407) are located on the same axis, one end of which is connected to the fixed rear plate (50418), the rear horizontal optical axis seat (50416) is concentrically matched with the brass driven shaft (50417), and is fixed to the rear fixed seat (50415) of the rotating optical axis seat by bolt connection, the rear bearing seat (50419) is concentrically matched with the brass driven shaft (50417), and is fixed to the fixed rear plate (50418) by bolt connection, and the fixed front plate (50403) and the fixed rear plate (50418) are fixed to the central fixing frame (501) by bolt connection.

2. The device for preparing multiple long fiber twisted filaments for 3D printing according to claim 1, characterized in that: The driving device (2) comprises a driving bracket (201), a first bearing seat (202), a reduction motor (203), a small cylindrical gear (204), and a large cylindrical gear (205). The reduction motor (203) is fixed on the driving bracket (201). The speed of the reduction motor (203) affects the speed of the main optical axis (1). The speed range of the main optical axis (1) is 0 to 180 rpm, that is, the number of turns of the multi-bundle fiber composite twisting is 0 to 180 rpm. The first bearing seat (202) is fixed on both sides of the top of the driving bracket (201). The small cylindrical gear (204) is connected to the output shaft of the reduction motor (203). The large cylindrical gear (205) is meshed with the small cylindrical gear (204) and is coaxially sleeved on the main optical axis (1) with the two first bearing seats (202) and fixed together with the main optical axis (1).

3. The device for preparing multiple long fiber twisted filaments for 3D printing according to claim 1, characterized in that: The pay-off device (4) comprises a fiber center fixing frame (401), a fiber optical axis fixing frame (402), a first horizontal optical axis seat (403), an optical axis (404), an ultra-thin bearing (405), a rotating fiber frame (406) and a wire coil blocking seat (407), wherein the fiber center fixing frame (401) is connected to the flange optical axis seat by bolt connection and is fixed on the main optical axis (1), and the fiber optical axis fixing frame (402) is fixed on the fiber center fixing frame (401). The shaft (404) is fixed to the fiber center fixing frame (401) through a threaded pair, the first horizontal optical axis seat (403) is connected to the fiber optical axis fixing frame (402) through a bolt connection, and is fixed to the optical axis (404), the rotating fiber frame (406) is sleeved on the optical axis (404) through an ultra-thin bearing (405), the fiber to be twisted is wound on the rotating fiber frame (406), and the coil blocking seat (407) is fixed to the end of the optical axis (404) through a bolt connection.

4. The device for preparing multiple long fiber twisted filaments for 3D printing according to claim 1, characterized in that: The rotating device (6) comprises a rotating center fixing frame (601), a second aluminum alloy block (602), a second claw-shaped connecting piece (603), a glass conduit fixing seat (604), a glass conduit (605) and a rotating wheel processing piece (606); the rotating center fixing frame (601) is coaxially matched with the main optical axis (1) and is fixed to the main optical axis (1) via a flange optical axis seat; the second claw-shaped connecting piece (603) is connected to the rotating center fixing frame (601) via the second aluminum alloy block (602); the rotating wheel processing piece (606) is connected to the second claw-shaped connecting piece (603) via a bolt connection; the glass conduit fixing seat (604) is arranged on the rotating wheel processing piece (606); the glass conduit (605) is fixed to the glass conduit fixing seat (604) via a rotating connection, with one end being in a horizontal state and the other end pointing to the main optical axis (1).

5. The device for preparing multiple long fiber twisted filaments for 3D printing according to claim 1, characterized in that: The supporting device (7) comprises a runner outer plate connecting plate (701), a front rotating outer plate (702), a rear rotating outer plate (703) and bearings (704); the runner outer plate connecting plate (701) is placed on a horizontal plane; the front rotating outer plate (702) and the rear rotating outer plate (703) are respectively fixed on both sides of the runner outer plate connecting plate (701); and the bearings (704) are evenly distributed between the front rotating outer plate (702) and the rear rotating outer plate (703).

6. The device for preparing multiple bundles of long fiber twisted filaments for 3D printing according to claim 1, characterized in that: The wire take-up device (8) comprises a funnel (801) and a funnel bracket (802), and the funnel (801) is fixed to the funnel bracket (802) by means of bolts.

7. The device for preparing multiple long fiber twisted filaments for 3D printing according to claim 1, characterized in that: The centering device (10) comprises a centering device base (1001), a first horizontal baffle (1002), a horizontal long trapezoidal screw (1003), a horizontal short trapezoidal screw (1004), a trapezoidal screw matching nut (1005), a second bearing seat (1006), a rotating handle (1007), a second horizontal optical axis seat (1008), a linear bearing (1009), a horizontal slide (1010), a vertical long trapezoidal screw (1011), a vertical short trapezoidal screw (1012), a second horizontal baffle (1013), a vertical slide (1014), a connecting aluminum plate (1015), a centering aluminum plate (1016) and a brass nozzle (1017). The device base (1001) is placed on a horizontal plane, the first horizontal baffles (1002) are arranged on both sides of the top of the centering device base (1001), the horizontal long trapezoidal screw (1003) is connected to the first horizontal baffles (1002) on both sides through the second bearing seat (1006), but one end passes through the first horizontal baffle (1002) on one side and is connected to the rotating handle (1007), the trapezoidal screw matching nut (1005) is sleeved on the horizontal long trapezoidal screw (1003), and the two ends of the horizontal short trapezoidal screw (1004) are fixed to the first horizontal baffles (1002) on both sides through the second horizontal optical axis seat (1008), and two linear bearings (1009) are distributed thereon. ), the lower side of the horizontal slide (1010) is fixed with the trapezoidal screw matching nut (1005) and the linear bearing (1009) by bolt connection, a second bearing seat (1006) and a second horizontal optical axis seat (1008) are provided on the upper side of the horizontal slide (1010), one end of the vertical long trapezoidal screw (1011) is fixed on the second bearing seat (1006) of the horizontal slide (1010), and the other end is connected to a rotating handle (1007), a trapezoidal screw matching nut (1005) is sleeved on the vertical long trapezoidal screw (1011), and one end of the vertical short trapezoidal screw (1012) is fixed to the second horizontal optical axis seat (100 8), the other end is fixed on the second horizontal optical axis seat (1008) of the second horizontal baffle (1013), a linear bearing (1009) is provided on the screw through a bolt connection, the vertical slide (1014) is fixed by a trapezoidal screw matching nut (1005) and a linear bearing (1009), the connecting aluminum plate (1015) is fixed to the vertical slide (1014) through a bolt connection, the centering aluminum plate (1016) is connected to the connecting aluminum plate (1015) through a bolt connection, and a brass nozzle (1017) is provided on the centering aluminum plate (1016), and the diameter of the brass nozzle (1017) is related to the diameter of the extruded wire, and the diameter range of the extruded wire is 1~4mm.

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