A resin-coated single-fiber spiral twisted yarn manufacturing apparatus

Abstract

The application discloses a resin-coated single-fiber spiral-twisted filament preparation device and relates to the technical field of 3D printing wire preparation. The device comprises a traction machine, an extruding machine and a twisting device. The twisting device comprises a power mechanism, a rotating mechanism, a fixing mechanism, a control system and a twisting device rack. In the twisting device, the power mechanism drives the rotating mechanism to rotate, thereby realizing the twisting of continuous fibers. The traction machine provides a traction force for the 3D printing filament, so that the prepared filament moves at a constant speed. The continuous fibers pass through the extruding machine, the extruding machine covers the surface of the continuous fibers with a layer of thermoplastic resin material, the surface of the twisted filament is coated, and the final filament is formed. Under the operation of the whole device, the resin-coated 3D printing wire containing the spiral-twisted continuous fibers is finally prepared.

Description

Technical Field

[0001] This invention relates to the technical field of 3D printing filament preparation, and particularly to a device for preparing resin-coated single-bundle spiral twisted filament. Background Technology

[0002] 3D printing, also known as additive manufacturing or rapid prototyping, is a technology that uses digital model files as a basis and constructs objects layer by layer using materials such as filaments, powders, granules, and liquids. In recent years, with the maturation of 3D printing technology, it has been applied to numerous fields, including mold making, industrial design, aerospace, automotive, and defense equipment. The filaments used in these fields are very extensive, including resin filaments, plastic filaments, metal filaments, nylon filaments, and fiber-resin composite filaments. Currently, with the trend towards lightweight engineering, fiber-resin composite filaments have become the preferred material for lightweight, high-strength, and high-toughness components, and have become a representative material for high-performance and lightweight development in many engineering fields.

[0003] Currently, many graduate students have attempted to improve the mechanical properties of filaments by adding continuous carbon fibers, continuous aramid fibers, and continuous glass fibers to resin materials. However, the improvement in mechanical properties has been quite limited. In fiber materials, twisting can enhance their mechanical properties because twisting compresses the outer fibers towards the inner layers, altering the fiber structure, increasing inter-fiber friction, thereby increasing fiber density and strength, and changing the fiber's physical and mechanical properties. Therefore, research on resin-based fiber twisted composite filament equipment is of significant value in improving the performance of fiber composite filaments. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of poor mechanical properties of existing fiber filaments by applying twisting technology to the preparation of 3D printed fiber filaments, and to propose a resin-coated single-bundle spiral twisted filament preparation device.

[0005] A resin-coated single-bundle helical twisted filament preparation device includes a traction machine, an extruder, and a twisting device;

[0006] The twisting device includes a rotating mechanism and a connecting piece 1 to the twisting device frame, a rotating mechanism, a rotating mechanism and a connecting piece 2 to the twisting device frame, a power mechanism, a fixing mechanism and a connecting piece 2 to the twisting device frame, a fixing mechanism, and a twisting device frame. The rotating mechanism is rotatably mounted on the twisting device frame via the rotating mechanism and the connecting piece 1 and the rotating mechanism and the connecting piece 2 to the twisting device frame. The power mechanism is mounted on the twisting device frame. The fixing mechanism is fixed to the twisting device frame via the fixing mechanism and the connecting piece 2 to the twisting device frame.

[0007] The rotating mechanism includes a rotating mechanism rhomboid bearing seat one, a driven shaft, a rotating mechanism horizontal optical shaft seat one, a rotating mechanism horizontal optical shaft seat one fixing seat, a rotating mechanism needle fixing seat one, a rotating mechanism rubber wheel fixing plate, a rotating mechanism horizontal optical shaft seat two, a rotating mechanism optical shaft, a rotating mechanism rubber wheel, a rotating mechanism dispensing needle, a rotating mechanism needle fixing seat two, a 2GT synchronous wheel, a drive shaft, and a rotating mechanism rhomboid bearing seat two. The rotating mechanism rhomboid bearing seats one and two are used to mount the entire rotating mechanism on the twisting device frame. One end of the driven shaft is concentrically fitted with the rotating mechanism rhomboid bearing seat and fixed with a set screw. The other end of the driven shaft is concentrically fitted with the rotating mechanism horizontal optical shaft seat one and fixed with the set screw integrated into the rotating mechanism horizontal optical shaft seat one. The right side of the rotating mechanism horizontal optical shaft seat one is connected to the rotating mechanism horizontal optical shaft seat one fixing seat 15 by bolts. The right side of the rotating mechanism horizontal optical shaft seat one fixing seat is fixed with a rotating mechanism. The rotating mechanism needle holder 1 has a rotating mechanism dispensing needle installed in the middle. The rotating mechanism horizontal optical shaft holder 1 is also bolted to the rotating mechanism rubber wheel holder plate. The rotating mechanism horizontal optical shaft holder 2 is fixed on the rotating mechanism rubber wheel holder plate. The rotating mechanism optical shaft and the rotating mechanism horizontal optical shaft holder 2 are concentrically fitted. The rotating mechanism rubber wheel and the rotating mechanism optical shaft are coaxially fitted. The rotating mechanism rubber wheel is located at the center of the rotating mechanism optical shaft. The radial direction of the rotating mechanism rubber wheel and the rotating mechanism optical shaft is the axial direction of the rotating mechanism. The right side of the rotating mechanism rubber wheel holder plate is bolted to the rotating mechanism needle holder 2. The rotating mechanism dispensing needle is installed in the middle of the rotating mechanism needle holder 2. The rotating mechanism horizontal optical shaft holder 2 is fixed on the right side of the rotating mechanism needle holder 2. The rotating mechanism horizontal optical shaft holder 2 is coaxially fitted with the drive shaft. A 2GT synchronous pulley is installed in the middle of the drive shaft. Two rotating mechanism rhomboid bearing seats 2 are installed at the right end.

[0008] The power mechanism includes a motor, a motor bracket, a synchronous pulley, and a synchronous belt. The motor is fixed on the twisting device frame by the motor bracket. The synchronous pulley is connected to the output shaft of the motor. One end of the synchronous belt is installed on the synchronous pulley, and the other end of the synchronous belt is installed on the 2GT synchronous pulley.

[0009] The fixing mechanism includes a horizontal optical shaft seat one, a horizontal optical shaft seat two, a limiting fixing seat, a fixing wheel fixing plate, a dispensing needle, an optical shaft, a rubber wheel, and a needle fixing seat. One end of the horizontal optical shaft seat one is used to connect to the twisting device frame, and the other end is coaxially fitted with the optical shaft. The horizontal optical shaft seat two is installed on the optical shaft. The bottom of the horizontal optical shaft seat two is bolted to the rubber wheel fixing plate. One side of the rubber wheel fixing plate is connected to the limiting fixing seat. The dispensing needle is installed in the middle of the limiting fixing seat. The other side of the rubber wheel fixing plate is bolted to the needle fixing seat. The dispensing needle is installed in the middle of the needle fixing seat. The rubber wheel and the optical shaft are coaxially fitted. The two rubber wheels are tangential, and the continuous fiber passes between the two rubber wheels.

[0010] The entire frame of the twisting device is constructed from aluminum profiles.

[0011] The beneficial effects of this invention are:

[0012] This resin-coated single-bundle spiral twisted filament preparation device, through the design of a relatively simple structure, realizes the addition of twisted continuous fibers during the preparation of 3D printing filaments, improves the performance of the filaments, and effectively enhances the mechanical properties of 3D printed filament parts. It provides an effective new method and equipment for the development of high-performance filament 3D printing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the single-bundle fiber twisted filament preparation device of the present invention;

[0014] Figure 2 This is a top view of the single-bundle fiber twisted filament preparation apparatus of the present invention;

[0015] Figure 3 This is a schematic diagram of the twisting device of the present invention;

[0016] Figure 4 This is a schematic diagram of the rotating mechanism of the present invention;

[0017] Figure 5 This is a schematic diagram of the power mechanism of the present invention;

[0018] Figure 6 This is a schematic diagram of the fixing mechanism of the present invention.

[0019] In the diagram: 1. Traction machine; 2. Extruder; 3. Twisting device; 4. Continuous fiber; 5. Connecting part 1 between the rotating mechanism and the twisting device frame; 6. Rotating mechanism; 7. Connecting part 2 between the rotating mechanism and the twisting device frame; 8. Power mechanism; 9. Connecting part between the fixing mechanism and the twisting device frame; 10. Fixing mechanism; 11. Twisting device frame; 12. First diamond-shaped bearing seat of the rotating mechanism; 13. Driven shaft; 14. First horizontal optical shaft seat of the rotating mechanism; 15. Fixed seat of the first horizontal optical shaft seat of the rotating mechanism; 16. First needle fixing seat of the rotating mechanism; 17. Rubber wheel fixing plate of the rotating mechanism; 18. Rotating mechanism 19. Horizontal optical shaft seat II; 20. Rotating mechanism optical shaft; 21. Rubber wheel; 22. Rotating mechanism dispensing needle; 23. Rotating mechanism needle fixing seat II; 24. 2GT synchronous pulley; 25. Drive shaft; 26. Rotating mechanism diamond bearing seat II; 27. Synchronous belt; 28. Synchronous pulley; 29. ​​Motor; 30. Fixed mechanism horizontal optical shaft seat I; 31. Fixed mechanism horizontal optical shaft seat II; 32. Limit fixing seat; 33. Fixed mechanism rubber wheel fixing plate; 34. Fixed mechanism dispensing needle; 35. Fixed mechanism optical shaft; 36. Fixed mechanism rubber wheel; 37. Fixed mechanism needle fixing seat. Detailed Implementation

[0020] Please see Figures 1 to 6 As shown, a resin-coated single-bundle fiber spiral twisted filament preparation device includes a traction machine 1, an extruder 2, and a twisting device 3;

[0021] Specifically, the maximum traction speed of the traction machine 1 is 7 cm / s, which is the fastest speed for preparing twisted filaments. The extrusion machine 2 is a Wellroom machine, and the extrusion part of the extrusion machine has been modified to change the longitudinal filament output to the transverse filament output. The extrusion part directly determines the diameter of the twisted filaments, and the diameter of the extruded twisted filaments is 1 to 5 mm.

[0022] The twisting device 3 includes a rotating mechanism and a connecting piece 5 to the twisting device frame, a rotating mechanism 6, a second connecting piece 7 to the rotating mechanism and the twisting device frame, a power mechanism 8, a fixing mechanism and a connecting piece 9 to the twisting device frame, a fixing mechanism 10, and a twisting device frame 11. The rotating mechanism 6 is rotatably mounted on the twisting device frame 11 through the first connecting piece 5 and the second connecting piece 7. The power mechanism 8 is mounted on the twisting device frame 11. The fixing mechanism 10 is fixed on the twisting device frame 11 through the fixing mechanism and the connecting piece 9.

[0023] Specifically, the power mechanism 8 drives the rotating mechanism 6 to rotate, thereby twisting the continuous fiber 4; by designing the fixing mechanism 10, one end of the continuous fiber filament can be fixed to prevent the continuous fiber 4 from falling off during the twisting process, thereby improving the stability of the continuous fiber twisting and the accuracy of the fiber twist.

[0024] The rotating mechanism 6 includes a rotating mechanism rhomboid bearing seat 12, a driven shaft 13, a rotating mechanism horizontal optical shaft seat 14, a rotating mechanism horizontal optical shaft seat 1 fixed seat 15, a rotating mechanism needle fixed seat 16, a rotating mechanism rubber wheel fixed plate 17, a rotating mechanism horizontal optical shaft seat 28, a rotating mechanism optical shaft 19, a rotating mechanism rubber wheel 20, a rotating mechanism dispensing needle 21, a rotating mechanism needle fixed seat 22, a 2GT synchronous pulley 23, a drive shaft 24, a rotating mechanism rhomboid bearing seat 25, and a rotating mechanism rhomboid bearing seat 1. 12 and the rotating mechanism rhomboid bearing seat 25 are used to mount the entire rotating mechanism 6 on the twisting device frame 11. One end of the driven shaft 13 is concentrically fitted with the rotating mechanism rhomboid bearing seat 12 and fixed by a set screw. The other end of the driven shaft 13 is concentrically fitted with the rotating mechanism horizontal optical shaft seat 14 and fixed by the set screw on the rotating mechanism horizontal optical shaft seat 14. The right side of the rotating mechanism horizontal optical shaft seat 14 is connected to the rotating mechanism horizontal optical shaft seat fixed seat 15 by bolts. The right side of the rotating mechanism horizontal optical shaft seat fixed seat 14 is fixed with a rotating shaft. The mechanism needle holder 16 has a rotating mechanism dispensing needle 21 installed in the middle. The rotating mechanism horizontal optical axis holder 15 is also bolted to the rotating mechanism rubber wheel holder 17. The rotating mechanism horizontal optical axis holder 28 is fixed on the rotating mechanism rubber wheel holder 17. The rotating mechanism optical axis 19 is concentrically fitted with the rotating mechanism horizontal optical axis holder 28. The rotating mechanism rubber wheel 20 is coaxially fitted with the rotating mechanism optical axis 19 and is located at the center of the rotating mechanism optical axis 19. The radial direction of the rotating mechanism rubber wheel 20 and the rotating mechanism optical shaft 19 is the axial direction of the rotating mechanism 6. The right side of the rotating mechanism rubber wheel fixing plate 17 is bolted to the rotating mechanism needle fixing seat 22. The rotating mechanism dispensing needle 21 is installed in the middle of the rotating mechanism needle fixing seat 22. The rotating mechanism horizontal optical shaft seat 28 is fixed on the right side of the rotating mechanism needle fixing seat 22. The rotating mechanism horizontal optical shaft seat 28 is coaxially engaged with the drive shaft 24. The drive shaft has a 2GT synchronous wheel 23 in the middle and two rotating mechanism rhomboid bearing seats 25 on the right end.

[0025] The power mechanism 8 includes a motor 28, a motor bracket 29, a synchronous pulley 27, and a synchronous belt 26. The motor 28 is fixed on the twisting device frame through the motor bracket 29. The synchronous pulley 27 is connected to the output shaft of the motor 28. One end of the synchronous belt 26 is mounted on the synchronous pulley 27, and the other end of the synchronous belt 26 is mounted on the 2GT synchronous pulley 23.

[0026] Specifically, the working speed range of motor 28 is 0 to 900 r / min, and the working speed range of rotating mechanism 6 is 0 to 300 r / min; the rotation of motor 28 through power mechanism 8 drives the entire rotating mechanism 6 to rotate, and the transmission ratio of belt drive is 1:3, so as to achieve the accuracy of twisting continuous fibers.

[0027] The fixing mechanism 10 includes a first horizontal optical axis seat 30, a second horizontal optical axis seat 31, a limiting fixing seat 32, a fixing plate 33 for the rubber wheel, a dispensing needle 34, an optical axis 35, a rubber wheel 36, and a needle fixing seat 37. One end of the first horizontal optical axis seat 30 is connected to the twisting device frame 11, and the other end is coaxially fitted with the optical axis 35. The second horizontal optical axis seat 31 is mounted on the optical axis 35. The bottom is bolted to the fixing mechanism rubber wheel fixing plate 33. One side of the fixing mechanism rubber wheel fixing plate 33 is connected to the limiting fixing seat 32. The middle of the limiting fixing seat 32 is equipped with the fixing mechanism dispensing needle 34. The other side of the fixing mechanism rubber wheel fixing plate 33 is bolted to the fixing mechanism needle fixing seat 37. The fixing mechanism dispensing needle 34 is installed in the middle of the fixing mechanism needle fixing seat 37. The fixing mechanism rubber wheel 36 and the fixing mechanism optical shaft 35 are concentrically matched. The two fixing mechanism rubber wheels 36 are externally tangent, and the continuous fiber 4 passes between the two fixing mechanism rubber wheels 36.

[0028] Specifically, by designing the fixing mechanism 10, one end of the continuous fiber filament can be fixed to prevent the continuous fiber 4 from falling off during the twisting process, thereby improving the stability of the continuous fiber twisting and the accuracy of the fiber twist.

[0029] The entire frame 11 of the twisting device is constructed from aluminum profiles.

[0030] Specifically, the single bundle of fibers used in this solution are continuous fibers, including but not limited to carbon fiber, glass fiber, aramid fiber, basalt fiber, or combinations thereof; the diameter of the continuous fibers can range from 0.5 to 4 mm; the twist of the continuous fibers is determined by the traction speed of the traction machine 1 and the working speed of the rotating mechanism 6, and the specific twist range depends on the type of continuous fiber selected; the resin used in this solution is a thermoplastic resin material, including but not limited to polylactic acid, polyethylene, polyvinyl chloride, polystyrene, polyamide, polylactic acid, polyoxymethylene, polyoxymethylene, polyphenylene ether, polysulfone, and rubber.

[0031] The working principle and process of this invention:

[0032] Please see Figures 1 to 6 As shown, during use, the continuous fiber 4 first passes through the twisting device 3. In the twisting device 3, the motor 28 of the power mechanism 8 rotates, which drives the rotating mechanism 6 to rotate through the synchronous belt 27, thus completing the twisting of the continuous fiber 4. After passing through the twisting device 3, the continuous fiber 4 passes through the extruder 2. The extruder 2 extrudes thermoplastic resin material, which wraps around the continuous fiber 4. Finally, it is connected to the traction machine 1, which provides traction power, and finally completes the preparation of the 3D printing filament.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, and similar technical solutions can be designed to achieve the above-mentioned technical effects, all of which fall within the protection scope of the present invention.

Claims

1. A device for preparing resin-coated single-bundle spiral twisted filaments, characterized in that: It includes a twisting device (3), an extruder (2) and a traction machine (1) arranged sequentially along the fiber direction, wherein the extruder (2) is for transverse fiber output; The twisting device (3) includes a rotating mechanism (6), a power mechanism (8), a fixing mechanism (10), and a twisting device frame (11). The rotating mechanism (6) is rotatably mounted on the twisting device frame (11) via the rotating mechanism and twisting device frame connector 1 (5) and the rotating mechanism and twisting device frame connector 2 (7) to apply spiral twisting to the single bundle of continuous fibers (4); the rotating mechanism (6) includes a rotating mechanism rubber wheel (20), a rotating mechanism dispensing needle (21), a drive shaft (24), a rotating mechanism needle fixing seat 1 (16), a rotating mechanism needle fixing seat 2 (22) and a rotating mechanism optical shaft (19); the rotating mechanism dispensing needle (21) is mounted on both sides of the rotating mechanism (6) via the rotating mechanism needle fixing seat 1 (16) and the rotating mechanism needle fixing seat 2 (22), the rotating mechanism rubber wheel (20) and the rotating mechanism optical shaft (19) are coaxially engaged, and the rotating mechanism rubber wheel (20) is located at the center of the rotating mechanism optical shaft (19); The fixing mechanism (10) is fixed to the twisting device frame (11) via the fixing mechanism and the twisting device frame connector (9); the fixing mechanism (10) includes two fixing mechanism rubber wheels (36), a fixing mechanism dispensing needle (34) and a fixing mechanism needle fixing seat (37); the two fixing mechanism rubber wheels (36) are tangent to each other, the continuous fiber (4) passes through the middle of the two fixing mechanism rubber wheels (36), and the fixing mechanism dispensing needle (34) is installed in the middle of the fixing mechanism needle fixing seat (37); The power mechanism (8) is mounted on the frame (11) of the twisting device and drives the rotating mechanism (6) to rotate. The traction machine (1) provides traction power, and the extruder (2) extrudes resin material to coat the twisted continuous fiber (4).

2. The apparatus for preparing resin-coated single-bundle spiral twisted filaments according to claim 1, characterized in that: The rotating mechanism (6) also includes a rotating mechanism rhomboid bearing seat one (12), a driven shaft (13), a rotating mechanism horizontal optical shaft seat one (14), a rotating mechanism horizontal optical shaft seat one fixing seat (15), a rotating mechanism rubber wheel fixing plate (17), a rotating mechanism horizontal optical shaft seat two (18), a 2GT synchronous wheel (23), and a rotating mechanism rhomboid bearing seat two (25); the rotating mechanism rhomboid bearing seat one (12) and the rotating mechanism rhomboid bearing seat two (25) mount the entire rotating mechanism (6) on the twisting device frame (11); the driven shaft (13) has two ends that are concentrically fitted with the rotating mechanism rhomboid bearing seat one (12) and the rotating mechanism horizontal optical shaft seat one (14) respectively and are fixed by set screws; the rotating mechanism horizontal The optical axis seat 1 (14) is bolted to the rotating mechanism rubber wheel fixing plate (17) via the rotating mechanism horizontal optical axis seat 1 fixing seat (15); the rotating mechanism horizontal optical axis seat 1 fixing seat (15) and the rotating mechanism rubber wheel fixing plate (17) are respectively fixedly installed with the rotating mechanism needle fixing seat 1 (16) and the rotating mechanism needle fixing seat 2 (22), and the rotating mechanism dispensing needle (21) is installed in the middle of the rotating mechanism needle fixing seat 1 (16) and the rotating mechanism needle fixing seat 2 (22); the drive shaft (24) is coaxially engaged with the rotating mechanism horizontal optical axis seat 2 (18), and the drive shaft (24) is equipped with a 2GT synchronous wheel (23) in the middle, and two rotating mechanism rhomboid bearing seats 2 (25) are installed on the right end.

3. The apparatus for preparing resin-coated single-bundle spiral twisted filaments according to claim 1, characterized in that: The fixing mechanism (10) further includes a first fixing mechanism horizontal optical axis seat (30), a second fixing mechanism horizontal optical axis seat (31), a limiting fixing seat (32), a fixing mechanism rubber wheel fixing plate (33), and a fixing mechanism optical axis (35); one end of the first fixing mechanism horizontal optical axis seat (30) is connected to the twisting device frame (11), and the other end is coaxially engaged with the fixing mechanism optical axis (35); the second fixing mechanism horizontal optical axis seat (31) is installed on the fixing mechanism optical axis (35), and its bottom is bolted to the fixing mechanism rubber wheel fixing plate (33); the two sides of the fixing mechanism rubber wheel fixing plate (33) are respectively connected to the limiting fixing seat (32) and the fixing mechanism needle fixing seat (37), and a fixing mechanism dispensing needle (34) is installed in the middle of the limiting fixing seat (32) and the fixing mechanism needle fixing seat (37); the two fixing mechanism rubber wheels (36) are coaxially engaged with the fixing mechanism optical axis (35).

4. The apparatus for preparing resin-coated single-bundle spiral twisted filaments according to claim 2, characterized in that: The power mechanism (8) includes a motor (28), a motor bracket (29), a synchronous pulley (27), and a synchronous belt (26). The motor (28) is fixed on the twisting device frame (11) through the motor bracket (29). The synchronous pulley (27) is connected to the output shaft of the motor (28). One end of the synchronous belt (26) is mounted on the synchronous pulley (27), and the other end of the synchronous belt (26) is mounted on the 2GT synchronous pulley (23).

5. The apparatus for preparing resin-coated single-bundle spiral twisted filaments according to claim 1, characterized in that: The entire frame (11) of the twisting device is constructed from aluminum profiles.

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