Wire feeding device for 3D printing

Abstract

The utility model relates to a wire feeding device for 3D printing, and solves the technical problem of how to enable a fiber printing mode of a spray head to be more stable and reliable in existing 3D printing equipment. The device comprises a vertical supporting plate, a driving roller driving motor, a roller shaft, a first synchronous belt wheel, a second synchronous belt wheel, a first synchronous belt, a driving roller, a driven roller, a jackscrew connecting block, a driven roller connecting block, a jackscrew, an extension spring and a feeding disc, the jackscrew connecting block is connected to the vertical supporting plate, and a sliding groove is formed in the jackscrew connecting block; the driven roller connecting block is located in a sliding groove of the jackscrew connecting block, the jackscrew is connected with an inner threaded hole of the jackscrew connecting block, the front end of the jackscrew abuts against the side face of the driven roller connecting block, the driven roller is rotationally connected with the driven roller connecting block, and one end of the extension spring is connected with the driven roller connecting block. The other end of the extension spring is connected with the jackscrew connecting block, and the driven roller is close to the driving roller. The 3D printer is widely applied to 3D printing equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a wire feeding device for 3D printing. Background Art

[0002] 3D printing technology generates three-dimensional entities by continuously stacking physical layers and adding materials layer by layer. It is widely used in medical, aerospace, automotive and other fields.

[0003] 3D printing equipment can be divided into two types according to the type of printing materials: single-material printing equipment and multi-material printing equipment. The single-material printing equipment adopts a single nozzle structure, and the printing materials used are hydrogel, silicone, photosensitive resin, etc. The functions of the printed products are limited. If other functional devices need to be set in the product, they need to be added manually, which is cumbersome to operate. For multi-layer multi-material flexible devices, the printing method is to change the material layer by layer, which is inefficient and cumbersome to operate. Through the material switching device, the single nozzle can switch materials when different materials are needed. This switching device has a complex structure, and because its feeding system is unique, the difference between different materials is only the color, which is still limited to the same physical state.

[0004] Regarding the second type of multi-material printing equipment, it is divided into the type using the same physical state material and the type using multiple physical state materials. For the type using the same physical state material, the equipment adopts two nozzles for co-YZ axis design. The two nozzles can only move relative to the X-axis direction, and each nozzle cannot move independently, resulting in a limited printing range; for the type using multiple physical state materials, the equipment has two modes: single nozzle co-extrusion and double nozzle double extrusion. The single nozzle co-extrusion mode is to fully mix the fiber and the glue in the nozzle chamber and extrude them together from the nozzle. This method can make the glue fully wrap the fiber to form a fiber-glue Liquid composite, but this method can only allow the glue and fiber to be printed in bundles, and the glue cannot be laid in other shapes; for the dual-nozzle dual extrusion method (refer to the invention patent application with application publication number CN117301506A), one nozzle prints the fiber, and the other nozzle prints other materials (such as thermoplastic matrix or glue). The fiber and glue are printed separately, but still layer by layer, first print a layer of base material, and then print a layer of fiber. There must be a sequence. The realization of dual-nozzle free printing requires complex motion path planning for the two nozzles, while avoiding collision between the two nozzles. In addition, the way the nozzle prints fibers needs to be improved to make it more stable and reliable. Summary of the invention

[0005] The utility model aims to solve the technical problem of how to make the nozzle print fiber more stable and reliable in the existing 3D printing equipment, and provides a wire feeding device for 3D printing that makes fiber printing more reliable and stable and is suitable for fibers of different diameters.

[0006] The utility model can also solve the technical problems that the existing 3D printing equipment is limited to the same physical state material, the various nozzles of the multi-nozzle structure cannot move independently, the dual-nozzle dual-extrusion structure has a complex working process, and the printing range is small and the printing efficiency is low. It also provides a 3D printing device with a wide printing range, high printing efficiency, and suitable for flexible fiber and glue liquid molding of materials in different material states.

[0007] The utility model provides a wire feeding device for 3D printing, comprising a vertical support plate, an active roller driving motor, a roller shaft, a first synchronous pulley, a second synchronous pulley, a first synchronous belt, an active roller, a passive roller, a top wire connecting block, a passive roller connecting block, a top wire, a tension spring, a feed tray and a feed tray driving motor, the active roller is fixedly connected to the roller shaft, the roller shaft is rotatably connected to the vertical support plate, the active roller driving motor is connected to the vertical support plate, the first synchronous pulley is connected to the output shaft of the active roller driving motor, and the second synchronous pulley is fixedly connected to the end of the roller shaft , the first synchronous belt is connected between the second synchronous pulley and the first synchronous pulley; the top screw connection block is fixedly connected to the vertical support plate, the top screw connection block is provided with a sliding groove, the passive roller connection block is located in the sliding groove of the top screw connection block, the top screw is connected to the internal threaded hole of the top screw connection block, the front end of the top screw abuts against the side of the passive roller connection block, the passive roller is rotatably connected to the passive roller connection block, one end of the tension spring is connected to the passive roller connection block, the other end of the tension spring is connected to the top screw connection block, and the front end of the top screw is located in the internal space of the tension spring; the passive roller is close to the active roller;

[0008] The feeding tray driving motor is connected to the vertical support plate, and the feeding tray is connected to the output shaft of the feeding tray driving motor;

[0009] The passive roller and the active roller are located below the feeding tray.

[0010] Preferably, a positioning block is connected to the vertical support plate, and the positioning block is provided with a positioning hole.

[0011] The beneficial effects of the utility model are as follows: the wire feeding device can stably and reliably transport the fiber downward from the fiber delivery needle, can adapt to fibers of different diameters, and is easy to operate; when printing is performed in conjunction with the dispensing needle, the fiber delivery operates independently, which is conducive to completing the composite printing of two physical materials and is conducive to improving printing efficiency.

[0012] The dispensing needle can operate independently and has a wide printing range. The 3D printing device realizes composite printing of two physical states. The dispensing needle and the fiber delivery needle can also move freely. The fiber and glue are printed independently, which broadens the laying range of the glue and improves the efficiency of multi-material printing.

[0013] Further features of the present invention will be clearly described in the following description of the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an axonometric view of a 3D printing device for flexible fiber and glue molding;

[0015] Figure 2 yes Figure 1 A front view of the 3D printing device for forming flexible fibers and glue liquid;

[0016] Figure 3 yes Figure 1 A left view of the 3D printing device for molding flexible fibers and glue;

[0017] Figure 4 yes Figure 1 A top view of the 3D printing device for forming flexible fibers and glue;

[0018] Figure 5 yes Figure 1 A schematic diagram of the structure of the linear module in the X-axis direction and the linear module in the Y-axis direction in the 3D printing device for forming flexible fibers and glue liquid;

[0019] Figure 6 yes Figure 5 a top view of the structure shown;

[0020] Figure 7 yes Figure 5 A front view of the structure shown;

[0021] Figure 8 yes Figure 5 a left side view of the structure shown;

[0022] Fig. 9 yes Figure 1 A schematic diagram of the structure of the linear module in the Z-axis direction in the 3D printing device for forming flexible fibers and glue liquid;

[0023] Fig.10 yes Fig. 9 a right side view of the structure shown;

[0024] Fig.11 yes Fig. 9 A front view of the structure shown;

[0025] Fig.12 yes Figure 1 In the structure shown, a partial enlarged view of the print head;

[0026] Fig.13 yes Figure 1 An axonometric view of a print head in the 3D printing device for forming flexible fibers and glue;

[0027] Fig.14 yes Fig.13 A front view of the structure shown;

[0028] Fig.15 yes Fig.13 a bottom view of the structure shown;

[0029] Fig.16 yes Fig.13 a right side view of the structure shown;

[0030] Fig.17 yes Fig.13 In the structure shown, a cross-sectional view of the components of the horizontal support plate, the dispensing needle connecting arm, the fiber delivery needle, and the dispensing needle;

[0031] Fig.18 yes Fig.13 In the structure shown, the lower end of the vertical support plate is fixedly connected to the top of the third synchronous pulley through a fixing plate;

[0032] Fig.19 yes Fig.13 An axonometric view of the fiber delivery needle in the illustrated structure;

[0033] Fig. 20 yes Fig.19 A cross-sectional view of the fiber delivery needle shown;

[0034] Fig.21 yes Fig.13 In the structure shown, a structural diagram of the connection between the dispensing needle fixing seat and the dispensing needle;

[0035] Fig. 22 yes Fig.21 In the structure shown, the structural diagram of the dispensing needle;

[0036] Fig.23 yes Fig. 22 A cross-sectional view of the dispensing needle shown;

[0037] Fig.24 is another specific structural diagram of a fiber delivery needle;

[0038] Fig.25 yes Fig.24 a cross-sectional view of the structure shown;

[0039] Fig.26 yes Fig.14 In the structure shown, the fiber conveying part is a structural diagram after removing the spring-type micro switch;

[0040] Fig. 27 It is a schematic diagram of the structure in which a tension spring in a print head is connected between a top wire connection block and a passive roller connection block;

[0041] Fig.28 It is a schematic diagram of the movement path of the dispensing needle on the horizontal plane;

[0042] Fig.29 It is a schematic diagram of the movement path of the dispensing needle on the horizontal plane;

[0043] Fig.30 It is a schematic diagram of the movement path of the dispensing needle on the horizontal plane;

[0044] Fig.31 It is another specific implementation structure diagram of the wire feeding device;

[0045] Fig.32 yes Fig.31 A front view of the structure shown;

[0046] Fig.33 yes Fig.31 a left side view of the structure shown;

[0047] Fig.34 It is a structural diagram of the passive roller moving guide block and the passive roller connecting plate connected together;

[0048] Fig.35 yes Fig.34 A front view of the structure shown;

[0049] Fig.36 yes Fig.31 In the structure shown, the top screw and the passive roller moving guide block cooperate with each other;

[0050] Fig.37 yes Fig.36 Axonometric drawing of another view of the structure shown;

[0051] Fig.38 It is an axonometric view of the passive roller moving guide block;

[0052] Fig.39 It is an axonometric view of the passive roller connecting plate;

[0053] Fig.40 It is an axonometric view of the passive roller connecting plate;

[0054] Fig.41 is a structural diagram of the damping mechanism;

[0055] Fig.42 It is a schematic diagram of the dispensing needle following the S-shaped motion path;

[0056] Fig.43 It is a schematic diagram of the dispensing needle moving along a spiral path;

[0057] Fig.44 is a schematic diagram of the printed flexible electronic device;

[0058] Fig.45 is a schematic diagram of the printed flexible electronic device;

[0059] Fig.46 It is a schematic diagram of a flexible product with microchannels.

[0060] Explanation of symbols in the figure:

[0061] 100. Support frame, 200. X-axis linear module, 201. X-axis motion drive motor, 202. Linear body, 202-1. Slider; 300. Y-axis linear module, 301. Y-axis motion drive motor, 302. Synchronous belt transmission mechanism, 303. Rotating shaft, 304. Linear module 1, 304-1. Slider 1, 305. Linear module 2, 305-1. Slider 2; 400. Z-axis linear module, 401. Lifting drive motor, 402. Screw, 403. Nut seat, 404. Lifting plate, 405. Z-axis slide rail assembly, 406. Platform connecting plate, 407. Upper bearing seat, 500. Platform, 600. Print head, 601. Vertical support plate, 602. Connecting plate, 603. First glue barrel connecting frame, 604. Second glue barrel connecting frame, 605. First glue barrel, 606. Second glue barrel, 607. Horizontal support plate, 608. Feed tray, 609. Feed tray drive motor, 610. Active roller, 611. Passive roller, 612. Active roller drive motor, 613. Second synchronous pulley, 614. First synchronous belt, 615. Top screw connection block, 616. Passive roller connection block, 617. Top screw, 618. Positioning block, 619. Horizontal support plate rotation drive motor, 620. Motor seat, 621. Third synchronous pulley, 622. Second synchronous belt, 623. First Four synchronous pulleys, 624. Guide tube, 625. Bearing, 626. Shrapnel micro switch, 627. Fiber delivery needle fixing seat, 628. Fiber delivery needle, 628-1. Center through hole, 628-2. Side guide tube, 628-3. Circular channel, 629. Dispensing needle connecting arm, 629-1. Glue inflow channel, 630. Dispensing needle connecting arm driving motor, 631. Motor seat, 632. Fifth synchronous pulley, 633. Third synchronous belt, 634. Rotating shaft, 635. Dispensing needle fixing seat, 636. Dispensing needle, 636-1. Glue channel, 637. Fixed plate, 638. Tension spring, 639. Passive roller moving guide block, 639-1. Sliding groove, 639-2. Spring placement hole, 640. Passive roller connecting plate, 640-1. Screw hole, 640-2. Spring positioning hole, 640-3. Passive roller connecting hole, 641. Compression spring, 642. Damping mechanism, 642-1. Feeding tray shaft, 642-2. Bearing seat fixing plate, 642-3. Bearing seat, 642-4. Bearing, 642-5. Friction plate, 642-6. Damping plate, 642-7. Spring, 642-8. Handwheel; 1. Fiber, 2. Functional fiber, 3-1. Base layer, 3-2. First intermediate layer, 3-3. Second intermediate layer, 3-4. Sealing layer, 4. Functional fiber, 5. Hollow fiber. DETAILED DESCRIPTION

[0062] The present invention will be further described in detail below with reference to the accompanying drawings using specific embodiments.

[0063] Example 1

[0064] like Figure 1-4 As shown, the 3D printing device includes a support frame 100, an X-axis linear module 200, a Y-axis linear module 300, a Z-axis linear module 400, a platform 500, and a print head 600. The X-axis linear module 200 is connected to the Y-axis linear module 300. The Y-axis linear module 300 can drive the X-axis linear module 200 to move along the Y-axis direction. When the X-axis linear module 200 moves, the slider 202-1 moves along the X-axis direction. The Z-axis linear module 400 is connected to the support frame 100. The Y-axis linear module 300 is fixedly installed on the top of the support frame 100, and the Z-axis linear module 400 is located below the Y-axis linear module 300. The platform 500 is connected to the Z-axis linear module 400. The Z-axis linear module 400 can drive the platform 500 to rise and fall when the Z-axis linear module 400 moves. The print head 600 is connected to the slider 202 - 1 of the X-axis linear module 200 . When the slider 202 - 1 moves along the X-axis direction, the print head 600 moves along the X-axis direction.

[0065] like Figure 5-8As shown, the Y-axis linear module 300 includes a Y-axis motion drive motor 301, a synchronous belt transmission mechanism 302, a rotating shaft 303, a linear module 1 304, and a linear module 2 305. The rotating shaft 303 is connected between the linear module 1 304 and the linear module 2 305. The Y-axis motion drive motor 301 is installed on the linear module 2 305. The output shaft of the Y-axis motion drive motor 301 is connected to one end of the rotating shaft 303 through the synchronous belt transmission mechanism 302. The linear module 1 304 is provided with a slider 1 304-1, and the linear module 2 305 is provided with a slider 2 305-1. When the Y-axis motion drive motor 301 works and drives the rotating shaft 303 to rotate, the rotating shaft 303 causes the linear module 1 304 and the linear module 2 305 to move synchronously, and the slider 1 304-1 and the slider 2 305-1 move synchronously along the Y-axis direction. These specific structures of the Y-axis linear module 300 are conventional structures of prior art products and are not repeated here. The X-axis linear module 200 includes an X-axis motion drive motor 201 and a linear body 202. The linear body 202 is provided with a slider 202-1. When the X-axis motion drive motor 201 is working, the slider 202-1 is driven to move. These specific structures of the X-axis linear module 200 are conventional structures of existing technology products and are not described in detail. One end of the linear body 202 of the X-axis linear module 200 is fixedly connected to the slider 1 304-1, and the other end is fixedly connected to the slider 2 305-1. The slider 1 304-1 and the slider 2 305-1 move synchronously along the Y-axis direction, and the X-axis linear module 200 moves along the Y-axis direction as a whole.

[0066] The linear module 1 304 and the linear module 2 305 are fixedly connected to the top of the support frame 100 through a connecting bracket, so that the linear module 300 in the Y-axis direction is fixed as a whole.

[0067] like Figure 9-11As shown, the specific structure of the Z-axis linear module 400 can be: including a lifting drive motor 401, a screw 402, a nut seat 403, a lifting plate 404, a Z-axis slide rail assembly 405, a platform connecting plate 406, an upper bearing seat 407, a lower bearing seat, and a belt transmission mechanism. The upper bearing seat 407 is installed on the upper part of the support frame 100, and the lower bearing seat is installed on the lower part of the support frame 100. The upper end of the screw 402 is connected to the upper bearing seat 407, and the lower end of the screw 402 is connected to the lower bearing seat. The screw 402 is supported by the two bearing seats. The support can rotate, the nut seat 403 is connected and matched with the screw rod 402, the two Z-axis direction slide rail assemblies 405 are installed side by side on both sides of the support frame 100, the middle part of the lifting plate 404 is fixedly connected with the nut seat 403, the two sides of the lifting plate 404 are respectively connected with the sliders on the two Z-axis direction slide rail assemblies 405, the platform connecting plate 406 is fixedly connected with the lifting plate 404, and the lifting drive motor 401 is fixedly installed at the bottom of the support frame 100, and the output shaft of the lifting drive motor 401 is connected with the lower end of the screw rod 402 through a belt transmission mechanism. When the lifting drive motor 401 is working, the screw rod 402 is driven to rotate through the belt transmission mechanism, and the rotation of the screw rod 402 drives the nut seat 403 to move upward or downward along the Z-axis direction, and the lifting plate 404 moves upward or downward accordingly, and the lifting plate 404 moves upward or downward with the platform connecting plate 406.

[0068] The Z-axis linear module 400 is located below the Y-axis linear module 300 .

[0069] refer to Figure 1 , 2 , 9, 10, 11, the platform 500 is connected to the platform connecting plate 406, and the platform 500 is located in a horizontal plane. When the platform connecting plate 406 moves upward or downward, the platform 500 can be driven to rise or fall along the Z-axis direction.

[0070] like Figure 12-18As shown, the print head 600 includes a vertical support plate 601, a connecting plate 602, a first glue barrel connecting frame 603, a second glue barrel connecting frame 604, a first glue barrel 605, a second glue barrel 606, a horizontal support plate 607, a feed tray 608, a feed tray drive motor 609, an active roller 610, a passive roller 611, an active roller drive motor 612, a first synchronous pulley, a second synchronous pulley 613, a first synchronous belt 614, a top screw connection block 615, a passive roller connection block 616, a top screw 617, a positioning block 618, a horizontal support plate rotation drive motor 619, and a motor Seat 620, third synchronous pulley 621, second synchronous belt 622, fourth synchronous pulley 623, guide tube 624, bearing 625, spring-type micro switch 626, fiber delivery needle fixing seat 627, fiber delivery needle 628, dispensing needle connecting arm 629, dispensing needle connecting arm driving motor 630, motor seat 631, fifth synchronous pulley 632, third synchronous belt 633, sixth synchronous pulley, rotating shaft 634, dispensing needle fixing seat 635, dispensing needle 636, fixing plate 637, tension spring 638, connecting plate 602 and vertical support plate 601 The top is fixedly connected, the first glue barrel connecting frame 603 and the second glue barrel connecting frame 604 are respectively fixedly connected to the upper part of the vertical support plate 601, the first glue barrel 605 is connected to the first glue barrel connecting frame 603, the second glue barrel 606 is connected to the second glue barrel connecting frame 604, the feed tray driving motor 609 is fixedly installed on the vertical support plate 601, the feed tray 608 is connected to the output shaft of the feed tray driving motor 609, the active roller 610 is fixedly connected to the roller shaft, the roller shaft is rotatably connected to the vertical support plate 601, and the active roller driving motor 612 is installed on the vertical support plate 601. The synchronous pulley is connected to the output shaft of the active roller driving motor 612, the second synchronous pulley 613 is fixedly connected to the end of the roller shaft, the first synchronous belt 614 is connected between the second synchronous pulley 613 and the first synchronous pulley, the top screw connecting block 615 is fixedly connected to the vertical support plate 601, the passive roller connecting block 616 is located in the sliding groove of the top screw connecting block 615, the top screw 617 is connected and matched with the internal threaded hole of the top screw connecting block 615, the front end of the top screw 617 is against the side of the passive roller connecting block 616, and the passive roller 611 is rotatably connected to the passive roller connecting block 616; refer to Fig.26 and 27, one end of the tension spring 638 is connected to the passive roller connecting block 616, and the other end of the tension spring 638 is connected to the top screw connecting block 615. The front end of the top screw 617 is located in the internal space of the tension spring 638. When the top screw 617 is rotated by hand, the top screw 617 moves to the right, and the front end of the top screw 617 presses the passive roller connecting block 616. The passive roller connecting block 616 slides to the right to move the passive roller 611 to the right, and the tension spring 638 is stretched. At this time, the top screw 617 is rotated in the opposite direction by hand to move the top screw 617 to the left. Under the pulling force of the tension spring 638, the passive roller connecting block 616 moves to the left, and the passive roller 611 moves to the left; The passive roller 611 is close to the active roller 610, and the passive roller 611 and the active roller 610 are located below the feeding tray 608. The spring-type micro switch 626 is connected to the vertical support plate 601, and the spring-type micro switch 626 is located between the feeding tray 608 and the active roller 610. The positioning block 618 is fixedly connected to the vertical support plate 601 by screws, and the fixed plate 637 is fixedly connected to the top surface of the third synchronous pulley 621. The lower end of the vertical support plate 601 is fixedly connected to the fixed plate 637. The upper part of the guide tube 624 passes through the fixed plate 637 and then passes through the positioning hole of the positioning block 618. The positioning block 618 can further make the positioning of the guide tube 624 more reliable.The horizontal support plate 607 is rotatably connected to the third synchronous pulley 621 through a bearing 625, the motor seat 620 is fixedly connected to the horizontal support plate 607, the horizontal support plate rotation drive motor 619 is installed on the motor seat 620, the fourth synchronous pulley 623 is connected to the output shaft of the horizontal support plate rotation drive motor 619, the second synchronous belt 622 is connected between the fourth synchronous pulley 623 and the third synchronous pulley 621, the guide tube 624 is fixedly connected to the center of the third synchronous pulley 621, the guide tube 624 is provided with a center through hole, the fiber delivery needle fixing seat 627 is connected to the lower end of the third synchronous pulley 621, the fiber delivery needle fixing seat 627 is provided with a center through hole, the center through hole of the fiber delivery needle fixing seat 627 is connected to the center through hole of the guide tube 624, the fiber delivery needle 628 is connected to the fiber delivery needle fixing seat 627, the center through hole of the fiber delivery needle 628 is connected to the center through hole of the fiber delivery needle fixing seat 627, the motor seat 631 is connected to the horizontal support plate 6 07 is fixedly connected, the dispensing needle connecting arm driving motor 630 is installed on the motor seat 631, the sixth synchronous belt pulley is connected to the output shaft of the dispensing needle connecting arm driving motor 630, the third synchronous belt 633 is connected between the fifth synchronous belt pulley 632 and the sixth synchronous belt pulley, the rotating shaft 634 is rotatably connected to the horizontal support plate 607 through a bearing, the fifth synchronous belt pulley 632 is fixedly connected to the upper end of the rotating shaft 634, one end of the dispensing needle connecting arm 629 is connected to the lower end of the rotating shaft 634, and the dispensing needle connecting arm 629 is connected to the lower end of the rotating shaft 634. The glue needle fixing seat 635 is connected to the other end of the glue needle connecting arm 629, and the other end of the glue needle connecting arm 629 is provided with a glue inflow channel 629-1. The glue needle fixing seat 635 is provided with a central through hole, and the central through hole of the glue needle fixing seat 635 is connected with the glue inflow channel 629-1. The glue needle 636 is connected to the glue needle fixing seat 635, and the glue needle 636 is provided with a glue channel, and the glue channel of the glue needle 636 is connected with the central through hole of the needle fixing seat 635. For example; Figure 21-23 As shown, the glue dispensing needle 636 is provided with a glue liquid channel 636-1, and the glue dispensing needle 636 is sleeved with the glue dispensing needle fixing seat 635 (or can be connected together by other means such as a threaded structure). Fig.19 and 20 As shown, the fiber delivery needle 628 is provided with a central through hole 628-1, and the fiber delivery needle 628 is connected to the fiber delivery needle fixing seat 627 by means of a socket connection or a threaded connection, and the fiber passes through the central through hole 628-1; the fiber delivery needle 628 can also be provided with a side duct 628-2 and a circular channel 628-3, and the side duct 628-2 is connected to the circular channel 628-3, and the circular channel 628-3 is located outside the central through hole 628-1.

[0071] When the horizontal support plate rotation drive motor 619 is working, the horizontal support plate 607 can be rotated around the third synchronous pulley 621 through the fourth synchronous pulley 623 and the second synchronous belt 622. When the glue needle connecting arm drive motor 630 is working, the glue needle connecting arm 629 can be rotated through the synchronous belt transmission mechanism, and the glue needle connecting arm 629 rotates to drive the glue needle 636 to rotate around the rotating shaft 634. The fiber 1 as the raw material is wound on the feeding tray 608. The fiber 1 drawn from the feeding tray 608 first passes through the spring-type micro switch 626, then passes between the active roller 610 and the passive roller 611, then passes through the guide tube 624, then passes through the fiber delivery needle fixing seat 627, and finally passes through the fiber delivery needle 628 before being output. The passive roller 611 squeezes the fiber toward the active roller 610, and the active roller drive motor 612 and the feeding tray drive motor 609 are started. The active roller drive motor 612 drives the active roller 610 to rotate through the first synchronous pulley, the first synchronous belt 614 and the second synchronous pulley 613, and the passive roller 611 rotates passively, and the fiber is transported downward. The feeding tray drive motor 609 drives the feeding tray 608 to rotate so that the fiber on the feeding tray 608 is continuously fed downward. Manually adjust the top screw 617 to adjust the distance between the passive roller 611 and the active roller 610 to adapt to fibers of different diameters. The function of the spring-type micro switch 626 is: Fig.14 and 12 , the fiber presses the spring of the spring-type micro switch 626 to turn on the circuit of the spring-type micro switch. When the fiber on the feeding tray 608 is used up, the pressure applied by the fiber to the spring disappears, the circuit of the spring-type micro switch is disconnected, and a corresponding signal is generated to the controller. The controller instructs the alarm device to send an alarm signal according to the received signal, prompting the operator that the fiber has been used up and needs to be stopped and replaced with a new feeding tray 608 to ensure the normal supply of fiber. When the discharge nozzle of the first glue barrel 605 or the second glue barrel 606 is connected to the glue inflow channel 629-1 of the glue needle connecting arm 629 through a hose, the glue in the first glue barrel 605 or the second glue barrel 606 flows into the glue inflow channel 629-1 through the hose, and then flows into the glue needle 636 from the central through hole of the needle fixing seat 635, and finally flows out from the glue channel 636-1 of the glue needle 636.

[0072] refer to Fig.24 and 25 Another specific structure of the fiber delivery needle shown in the figure is that the fiber delivery needle is provided with a central through hole. The fiber delivery needle can replace Fig.19 and 20 A fiber delivery needle 628 is shown.

[0073] refer to Fig.26It is also feasible not to set the spring-type micro switch 626, but the fiber presence or absence detection function is lost.

[0074] The connection plate 602 is fixedly connected to the slider 202 - 1 of the X-axis linear module 200 by screws to achieve the installation of the print head 600 .

[0075] exist Figure 1 , 12 , 13 and 14, the horizontal support plate rotation drive motor 619 is operated to rotate the horizontal support plate 607, and the movement path of the glue dispensing needle 636 on the horizontal plane is as shown in FIG. Fig.28 As shown in the dotted circle in Figure 1 , 12 13 and 14, the dispensing needle connecting arm 629 is driven by the dispensing needle connecting arm driving motor 630 to rotate inwards to a certain angle, and then reaches Fig.29 At this time, the motion path of the dispensing needle 636 on the horizontal plane is as follows: Fig.29 As shown in the dotted circle in Fig.29 The diameter ratio of the dotted circle Fig.28 The diameter of the dotted circle in the middle is smaller. Fig.29 Based on the state shown, the dispensing needle connecting arm 629 continues to rotate inward to a position parallel to the horizontal support plate 607, as shown in FIG. Fig.30 As shown, at this time, the movement path of the dispensing needle 636 on the horizontal plane is as follows Fig.30 As shown in the dotted circle in . It can be seen that Fig.30 Displays the minimum range of motion of the dispensing needle 636. Fig.28 The maximum range of motion of the dispensing needle 636 is shown.

[0076] When the horizontal support plate 607 rotates and the dispensing needle connecting arm 629 rotates, the two are linked together to enable the dispensing needle 636 to reach any predetermined position on the horizontal plane.

[0077] It should be noted that the length of the dispensing needle connecting arm 629 can be designed to be longer. Fig.30 In the state shown, the dispensing needle 636 is brought as close as possible to the fiber delivery needle 628.

[0078] The following is an example of the working process and usage of the above 3D printing device:

[0079] The first case is applied in the field of flexible electronic devices.

[0080] Step (1), printing the base layer. The linear module 200 in the X-axis direction and the linear module 300 in the Y-axis direction are fixed, the position of the fiber delivery needle 628 is fixed (initial position), and the base layer is printed by the glue dispensing needle 636. The specific process is that under the control of the host computer, the glue dispensing needle connecting arm 629 moves, the horizontal support plate 607 moves, and the glue dispensing needle connecting arm 629 and the horizontal support plate 607 are linked to make the glue dispensing needle 636 reach the predetermined position on the platform 500 to lay the glue. The movement path of the glue dispensing needle 636 is set as needed, for example, the path of the glue dispensing needle 636 is set according to Fig.42 The S-shaped glue output forms a base layer in the S-shaped manner. For example, the path of the glue dispensing needle 636 follows Fig.43 As shown in the spiral shape, the output glue liquid also forms a base layer in the spiral shape.

[0081] Step (2), print the functional layer. The dispensing needle 636 returns to the original position and does not move (for the S-shaped case, return to Fig.42 upper left corner as shown; for the spiral, return to Fig.43 The center point shown in the figure), then, under the coordinated movement of the X-axis linear module 200 and the Y-axis linear module 300, the fiber delivery needle 628 performs a translational movement in the formed glue plane, and the wire feeding device acts synchronously, thereby laying the functional fiber to the designated position on the base layer. The functional fiber can have conductive properties.

[0082] Step (3), the fiber delivery needle 628 is returned to the initial position and fixed, and the dispensing needle connecting arm 629 and the horizontal support plate 607 are linked to make the dispensing needle 636 lay the glue on the base layer according to the predetermined path to form a sealing layer to cover the functional fiber, and finally form Fig.44 The flexible electronic device shown.

[0083] The molded flexible electronic devices can be widely used in many fields such as signal sensing, flexible display, thin-film solar cells, soft robots, wearable electronic devices, etc.

[0084] Fig.45 Shown is the structure of a flexible electronic device, which is printed to form a base layer 3-1, a first intermediate layer 3-2, a second intermediate layer 3-3, and a sealing layer 3-4.

[0085] The second case is applied in the field of microchannels.

[0086] Step (1), the X-axis linear module 200 and the Y-axis linear module 300 are fixed, and the position of the fiber delivery needle 628 is fixed (initial position);

[0087] Step (2), fixing the end of the hollow fiber output from the wire feeding device on the platform 500;

[0088] Step (3), the dispensing needle connecting arm 629 and the horizontal support plate 607 are linked to move the dispensing needle 636 onto the platform 500 to print glue to wrap the hollow fiber;

[0089] Step (4), the platform 500 descends a certain distance, the wire feeding device moves synchronously, the position of the fiber delivery needle 628 is fixed or the X-axis linear module 200 and the Y-axis linear module 300 cooperate to move the fiber delivery needle 628 to another position;

[0090] Step (5), the dispensing needle connecting arm 629 and the horizontal support plate 607 are linked to move the dispensing needle 636 to continue printing the glue liquid, and a new glue liquid layer is formed on the glue liquid layer formed in step (3) to wrap the hollow fiber;

[0091] Step (6), repeat steps (4) and (5) to finally form a flexible product of a certain height, such as Fig.46 shown.

[0092] When the flexible product is used, the hollow fiber 5 is used as a microchannel. Different functions can be realized by injecting different functional liquids into the hollow fiber 5, such as injecting liquid metal, magnetostrictive material, etc. to prepare sensors or brakes.

[0093] It should be noted that the printing process in the above two situations or the printing process in other situations may be: the platform 500 descends, the wire feeding device operates synchronously, and the glue dispensing needle outputs glue liquid.

[0094] Example 2

[0095] This embodiment modifies the wire feeding device of the print head 600 structure in the aforementioned embodiment 1.

[0096] refer to Fig.31 , the top screw connection block 615 in the print head 600 in embodiment 1 is replaced by a passive roller moving guide block 639, the passive roller connection block 616 is replaced by a passive roller connection plate 640, and the tension spring 638 is replaced by a compression spring 641. Figure 31-40As shown, the passive roller moving guide block 639 is fixedly connected to the vertical support plate 601, the passive roller connecting plate 640 cooperates with the passive roller moving guide block 639, the compression spring 641 is located between the passive roller connecting plate 640 and the passive roller moving guide block 639, the bottom of the passive roller moving guide block 639 is provided with a sliding groove 639-1, the side of the passive roller moving guide block 639 is provided with a spring placement hole 639-2, the end of the passive roller connecting plate 640 is provided with a screw hole 640-1, the middle of the passive roller connecting plate 640 is provided with a spring positioning hole 640-2, the passive roller connecting plate 640 is located in the sliding groove 639-1 of the passive roller moving guide block 639, the passive roller connecting plate 640 can slide in the sliding groove 639-1, and one end of the compression spring 641 is located at the spring The spring placement hole 639-2, the other end of the compression spring 641 is located in the spring positioning hole 640-2, the top screw 617 is connected to the screw hole 640-1, and the end of the top screw 617 presses on the outer side of the passive roller moving guide block 639; the passive roller 611 is connected to the passive roller connecting hole 640-3 on the passive roller connecting plate 640, and the passive roller 611 can rotate; when the top screw 617 is tightened by hand, the passive roller connecting plate 640 moves to the left, and the passive roller 611 moves to the left with the passive roller connecting plate 640, and the compression spring 641 is compressed. When the top screw 617 is loosened by hand, under the elastic force of the compression spring 641, the passive roller connecting plate 640 moves to the right, and the passive roller 611 moves to the right with the passive roller connecting plate 640 (moves to the direction of the active roller 610). It can be seen that manually adjusting the top screw 617 and the distance between the passive roller 611 and the active roller 610 can adapt to fibers with different diameters.

[0097] Those skilled in the art will appreciate that the wire feeding device may also have other specific structures.

[0098] The feed tray drive motor 609 in the print head 600 in Example 1 is replaced with a damping mechanism 642, such as Fig.33 and 41As shown, the damping mechanism 642 includes a feed tray shaft 642-1, a bearing seat fixing plate 642-2, a bearing seat 642-3, a bearing 642-4, a friction plate 642-5, a damping plate 642-6, a spring 642-7, and a hand wheel 642-8. The bearing seat fixing plate 642-2 is fixedly connected to the vertical support plate 601, and the bearing seat 642-3 is fixedly connected to the bearing seat fixing plate 642-2. The feed tray shaft 642-1 passes through the bearing seat 642-3, the bearing seat fixing plate 642-2, and the vertical support plate 601 in sequence. The feed tray shaft 642 -1 is connected to the bearing seat 642-3 through the bearing 642-4, the friction plate 642-5 is sleeved on the feed tray shaft 642-1, the friction plate 642-5 rests on the bearing seat 642-3, the damping plate 642-6 is sleeved on the feed tray shaft 642-1, the spring 642-7 is sleeved on the feed tray shaft 642-1, the hand wheel 642-8 is connected to the threaded end of the feed tray shaft 642-1, the hand wheel 642-8 presses down the spring 642-7, the spring 642-7 presses down the damping plate 642-6, and the damping plate 642-6 presses down the friction plate 642-5. The feed tray 608 is fixedly connected to the other end of the feed tray shaft 642-1. When the feed tray 608 rotates, the feed tray 608 drives the feed tray shaft 642-1 to rotate, and the friction between the damping plate 642-6 and the friction plate 642-5 generates a certain resistance. Since the hand wheel 642-8 is connected to the end of the feed tray shaft 642-1 through a threaded structure, the pressure of the spring 642-7 on the damping plate 642-6 can be adjusted by turning the hand wheel 642-8 by hand, thereby adjusting the resistance. The damping mechanism can make the feed tray 608 more stable in conveying fibers. The resistance is determined by the characteristics of the fibers to be conveyed. For example, for softer fibers, the hand wheel 642-8 can be loosened to make the feed tray 608 easier to rotate.

Claims

1. A wire feeding device for 3D printing, characterized in that: It includes a vertical support plate, an active roller drive motor, a roller shaft, a first synchronous pulley, a second synchronous pulley, a first synchronous belt, an active roller, a passive roller, a top wire connecting block, a passive roller connecting block, a top wire, a tension spring, a feed tray and a feed tray drive motor, the active roller is fixedly connected to the roller shaft, the roller shaft is rotatably connected to the vertical support plate, the active roller drive motor is connected to the vertical support plate, the first synchronous pulley is connected to the output shaft of the active roller drive motor, the second synchronous pulley is fixedly connected to the end of the roller shaft, the first synchronous The belt is connected between the second synchronous pulley and the first synchronous pulley; the top screw connection block is fixedly connected to the vertical support plate, the top screw connection block is provided with a sliding groove, the passive roller connection block is located in the sliding groove of the top screw connection block, the top screw is connected to the internal threaded hole of the top screw connection block, the front end of the top screw abuts against the side of the passive roller connection block, the passive roller is rotatably connected to the passive roller connection block, one end of the tension spring is connected to the passive roller connection block, the other end of the tension spring is connected to the top screw connection block, and the front end of the top screw is located in the internal space of the tension spring; The passive roller is close to the active roller; The feeding tray driving motor is connected to the vertical support plate, and the feeding tray is connected to the output shaft of the feeding tray driving motor; The passive roller and the active roller are located below the feeding tray.

2. The wire feeding device for 3D printing according to claim 1, characterized in that: The vertical support plate is connected with a positioning block, and the positioning block is provided with a positioning hole.

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