High-speed multi-orifice FDM printer and printing process thereof

Abstract

The high-speed multi-spraying-hole FDM printer comprises a machine table and a stock bin arranged on the rear side of the machine table, an XZ-axis moving assembly and a Y-axis moving assembly are arranged on the machine table, a spraying head assembly is arranged at the output end of the XZ-axis moving assembly, the Y-axis moving assembly is arranged in the middle of the machine table, and a machining platform is arranged at the output end of the Y-axis moving assembly. The spray head assembly comprises a mounting frame fixedly arranged at the output end of the XZ-axis moving assembly and spray head bodies detachably arranged on the mounting frame, a spray head replacing assembly is further arranged on the machining platform, a plurality of spray head bodies are arranged on the spray head replacing assembly, and the different spray head bodies correspond to wires of different colors. The spray head body is detachably connected with the mounting frame, and the spray head replacement assembly is arranged, so that wires with different colors correspond to different spray head bodies, and the step of extruding redundant materials in the spray head body and the step of cutting off the redundant materials are omitted.

Description

Technical Field

[0001] The present invention relates to additive manufacturing equipment, in particular to a high-speed multi-nozzle FDM printer and a printing process thereof. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses 3D model files as the basis and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer. Among them, the fused deposition 3D printer is a more common type, which completes printing by melting the wire raw material and squeezing it out of the nozzle.

[0003] At present, a Chinese patent with announcement number CN104772907A discloses a multi-color 3D printer, including a movable mounting plate, a plurality of nozzle assemblies, a first transmission assembly, a second transmission assembly and a third transmission assembly. The purpose of multi-color printing is achieved by setting a plurality of nozzle assemblies and making the nozzle assemblies spray materials of different colors.

[0004] The above patent still has shortcomings. The above patent increases the spraying color by adding nozzles. When more spraying colors are required, adding more nozzles and transmission components will greatly increase the manufacturing cost of the equipment. When a single nozzle is working, other nozzles need to be moved to the edge of the transmission component to make processing space for the working nozzle. When the number of nozzles increases, more nozzles stacked at the edge will reduce the movable stroke of the nozzle during work, resulting in an increase in the volume of the equipment itself and a decrease in the maximum volume of the products produced, resulting in poor space utilization. Therefore, existing multi-color 3D printers are usually only provided with one nozzle and one transmission component, and multiple pipes for conveying raw materials are connected to the nozzle. However, when changing colors, the original color raw materials need to be cut off and the residual raw materials in the nozzle need to be sprayed out before printing can continue. When the color conversion is more frequent, a lot of time and raw materials need to be wasted in this process, resulting in low printing efficiency and high printing cost. Summary of the invention

[0005] In view of this, the first object of the present invention is to provide a high-speed multi-nozzle FDM printer, which has the advantages of fast printing speed and low printing cost.

[0006] The technical solution of the present invention is: a high-speed multi-nozzle FDM printer, comprising a machine table and a material bin arranged at the rear side of the machine table, an XZ-axis moving component and a Y-axis moving component are arranged on the machine table, a nozzle component is arranged at the output end of the XZ-axis moving component, the Y-axis moving component is arranged in the middle of the machine table, and a processing platform is arranged on its output end, the nozzle component comprises a mounting frame fixedly arranged at the output end of the XZ-axis moving component and a nozzle body detachably arranged on the mounting frame, a plurality of input holes for wires to pass through are provided at the upper end of the mounting frame, a mounting groove is provided at the bottom of the mounting frame, a fixing part, a cutting part and a driving part are also provided at the side end of the mounting frame, the fixing part is used to fix the nozzle body in the mounting groove, the cutting part is used to cut the wire, and the driving part is used to drive the wire to move toward the nozzle body, and a nozzle replacement component is also provided on the processing platform, and a plurality of nozzle bodies are provided on the nozzle replacement component, and different nozzle bodies correspond to wires of different colors.

[0007] Through the above-mentioned technical means, through the detachable connection between the nozzle body and the mounting frame, and by setting the nozzle replacement assembly, different colored wires correspond to different nozzle bodies. When the color needs to be changed within the program, the unmelted wire in the nozzle head is directly cut off, and the nozzle body is replaced to preserve the unextruded material in the nozzle body, thereby omitting the steps of extruding excess material in the nozzle body and cutting off excess material, thereby increasing printing efficiency and reducing material waste.

[0008] Preferably, the nozzle replacement assembly comprises a turntable, a plurality of placement holes are formed on the turntable, the nozzle body is arranged in the placement holes, and a heat preservation ring is arranged in the placement holes.

[0009] Through the above technical means, the nozzle body is stored on the turntable to facilitate the replacement of the nozzle body. By arranging a heat preservation ring in the storage hole, the wire of the nozzle body is prevented from cooling and solidifying. When the nozzle body needs to be replaced, the spraying can be carried out directly, which saves the time of reheating and melting, and further increases the printing efficiency.

[0010] Preferably, a mounting slot is further provided at the side end of the mounting frame, and the fixing member includes an electric cylinder and a slot push plate, the electric cylinder is fixedly arranged at the side end of the mounting frame, the slot push plate is fixedly arranged at the output end of the electric cylinder and slidably arranged in the mounting slot, and an annular groove is arranged at the rear end of the nozzle body, and when the electric cylinder drives the slot push plate to be inserted into the annular groove, the nozzle body is fixed between the mounting frame.

[0011] Through the above technical means, the movement of the slot push plate is controlled by the electric cylinder, so that the slot push plate and the ring groove are engaged with each other, thereby completing the fixation of the nozzle body.

[0012] Preferably, a cutting groove is further provided at the side end of the mounting frame, and the cutting member comprises an annular cutter arranged at the output end of the electric cylinder, the annular cutter is slidably arranged in the cutting groove, a cutting hole is provided on the annular cutter, and a cutting blade is provided on one side of the cutting hole.

[0013] Through the above technical means, the movement of the annular cutter is controlled by the electric cylinder, so that the annular cutter is driven to cut the wire while the electric cylinder drives the slot push plate to move, and the annular cutter returns to its position while the slot push plate fixes the nozzle body.

[0014] Preferably, the driving member includes a servo motor 1, an active roller and a plurality of driven rollers, the active roller and the driven roller are arranged at the lower end of the input hole, the wire passes between the active roller and the driven roller, the active roller is fixed to the output end of the servo motor 1, the active roller is provided with a plurality of roller ring grooves, the number of the driven rollers is consistent with the number of the roller ring grooves, a center rod is also provided in the mounting frame, a square groove is provided in the middle of the driven roller, the square groove is slidably matched with the center rod, a spring 1 is also provided between the square groove and the center rod, an outer roller ring is also provided on the outer side of the driven roller, a pressure roller assembly is also provided on the side of the driven roller away from the active roller, the pressure roller assembly is used to push the driven roller toward the active roller and make it fit with the active roller.

[0015] Through the above technical means, the active roller is driven to rotate by the servo motor 1, and a roller ring groove is opened on the active roller, so as to cooperate with the driven roller to complete the wire transportation, and the driven roller corresponding to a certain color of wire is selected by the pressure roller assembly to fit with the active roller and tighten the wire, so as to select a certain color of wire to move toward the nozzle body, realize the function of automatic wire selection, and realize the reset of the driven roller by spring 1.

[0016] Preferably, the pressure roller assembly includes a supporting shell and a plurality of push rods, a push roller is provided at one end of the push rod, and a slider is fixedly provided at the side end, a cavity is opened in the supporting shell, the push roller is arranged in the cavity, a sliding hole is opened at the side end of the cavity, a limiting groove cooperating with the slider is arranged at the side wall of the sliding hole, a threaded hole is also provided at the bottom of the sliding hole, a push plate is provided in the threaded hole, the push plate is threadedly connected to the threaded hole and abuts against the push rod, and an adjustment assembly for driving the push plate to rotate is also provided at the nozzle replacement assembly.

[0017] Through the above-mentioned technical means, the push plate is pressed against the push rod, and the push plate is rotated through the adjusting component, so that the push plate drives the push roller to press the driven roller, and the driven roller presses the active roller, so that the movement of a certain color wire is selected through the adjusting component, and by setting the adjusting component at the nozzle replacement component, the driven roller is adjusted while replacing the nozzle, and the push rod is prevented from rotating by the cooperation of the slider and the limit groove.

[0018] Preferably, the adjustment component includes a mounting platform and a plurality of servo motors 2 arranged on the mounting platform, the output ends of the servo motors 2 are all provided with hexagonal heads, and the push plate is provided with a hexagonal groove.

[0019] Through the above technical means, the adjustment of the pressure roller assembly is achieved through the cooperation between the hexagonal head and the hexagonal groove and through the servo motor 2.

[0020] The second object of the present invention is to provide a printing process for a high-speed multi-nozzle FDM printer, which can automatically replace the nozzle body through M code.

[0021] The technical solution of the present invention is: a printing process of a high-speed multi-nozzle FDM printer, comprising the following steps: Step 1: Model design: model building or scanning the model and determine the color of each part of the model; Step 2: Slice the model. Slice the designed 3D model and generate G code and M code for each slice. Step 3: Select the printing material, guide the wires of different colors into the input hole, and pass the wires through the driver; Step 4: Set the printing parameters, prepare the same number of nozzle bodies as the types of wires and put them into the storage holes, add the position information of the nozzle bodies into the M code, make the M code correspond to the position of the nozzle bodies, and set the printing speed, printing temperature and printing accuracy; Step 5: Start printing.

[0022] Through the above technical solution, by generating G code and M code while slicing, it is ensured that the wire and the nozzle body can be quickly replaced during the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment; Figure 2 It is a structural schematic diagram of the nozzle assembly; Figure 3 is a cross-sectional schematic diagram of a nozzle assembly; Figure 4 is a partial schematic diagram of a driving member; Figure 5 Schematic diagram of the structure of the nozzle replacement assembly Figure 1 ; Figure 6 Schematic diagram of the structure of the nozzle replacement assembly Figure 2 ; Figure 7 It is a schematic diagram of the structure of the pressure roller assembly.

[0024] Figure numerals: 1, machine table; 2, material bin; 3, XZ axis moving assembly; 4, Y axis moving assembly; 5, nozzle assembly; 6, processing platform; 7, mounting frame; 8, nozzle body; 9, input hole; 10, mounting groove; 11, fixing member; 12, cutting member; 13, driving member; 14, nozzle replacement assembly; 15, turntable; 16, storage hole; 17, insulation ring; 18, mounting slot; 19, electric cylinder; 20, slot push plate; 21, ring groove; 22, cutting groove; 23, ring cutter; 24, cutting hole; 25 , cutting blade; 26, servo motor one; 27, active roller; 28, driven roller; 29, roller ring groove; 30, center rod; 31, square groove; 32, spring one; 33, outer roller ring; 34, self-lubricating ring; 35, pressure roller assembly; 36, supporting shell; 37, push rod; 38, push roller; 39, limit groove; 40, cavity; 41, sliding hole; 42, slider; 43, threaded hole; 44, push plate; 45, adjustment assembly; 46, servo motor two; 47, hexagonal head; 48, hexagonal groove; 49, mounting table. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0026] Embodiment 1:

[0027] A high-speed multi-jet FDM printer, such as Figure 1-7 As shown, it includes a machine table 1 and a silo 2 arranged at the rear side of the machine table 1, the silo 2 is used to store up to four rolled wires, the machine table 1 is provided with an XZ-axis moving component 3 and a Y-axis moving component 4, the XZ-axis moving component 3 and the Y-axis moving component 4 are both composed of structures such as a motor, a lead screw, a slide table and a slide rail, which are prior arts and are not described in detail herein, the XZ-axis moving component 3 is arranged on both sides of the machine table 1, and a nozzle component 5 for extruding the wire is arranged at the output end thereof, the wire enters the nozzle component 5 from the silo 2, the Y-axis moving component 4 is arranged in the middle of the machine table 1, and a processing platform 6 is arranged on the output end thereof, and the nozzle component 5 sprays the melted wire onto the processing platform 6 to complete printing.

[0028] The nozzle assembly 5 includes a mounting frame 7 fixedly arranged at the output end of the XZ axis moving assembly 3 and a nozzle body 8 detachably arranged on the mounting frame 7. Four input holes 9 for wires to pass through are provided at the upper end of the mounting frame 7. Wires of four different colors enter the mounting frame 7 from the input holes 9. A mounting groove 10 is provided at the bottom of the mounting frame 7. A fixing part 11, a cutting part 12 and a driving part 13 are also provided at the side end of the mounting frame 7. The fixing part 11 is used to fix the nozzle body 8 in the mounting groove 10. The mounting groove 10 and the nozzle body 8 are clearance-matched to ensure the accuracy when changing the nozzle. The cutting part 12 is used to cut the wire. The driving part 13 13 is used to drive the wire to move toward the nozzle body 8. A nozzle replacement assembly 14 is also provided on the processing platform 6. Four nozzle bodies 8 are provided on the nozzle replacement assembly 14. Different nozzle bodies 8 correspond to wires of different colors. When the wire needs to be changed in color, the nozzle body 8 installed in the installation groove 10 is placed back into the nozzle replacement assembly 14, and the corresponding nozzle body 8 is reinstalled in the installation groove 10, so that there is no need to squeeze out the melted wire in the nozzle body 8, and the steps of squeezing out excess material in the nozzle body 8 and cutting off excess material are omitted, thereby increasing printing efficiency and reducing material waste.

[0029] The nozzle replacement assembly 14 includes a turntable 15, and a motor for driving the turntable 15 to rotate is provided at the bottom of the turntable 15. Four storage holes 16 are opened on the turntable 15, and the four nozzle bodies 8 are respectively arranged in the storage holes 16. The storage holes 16 are all provided with insulation rings 17 to prevent the wire in the nozzle body 8 from cooling and solidifying. When the nozzle body 8 needs to be replaced, the internal wire can be directly sprayed out, saving the time of reheating and melting, and further increasing the printing efficiency.

[0030] The side end of the mounting frame 7 is also provided with a mounting slot 18, and the fixing member 11 includes an electric cylinder 19 and a slot push plate 20. The electric cylinder 19 is fixedly arranged at the side end of the mounting frame 7, and the slot push plate 20 is fixedly arranged at the output end of the electric cylinder 19 and slidably arranged in the mounting slot 18. The tail of the nozzle body 8 is provided with an annular groove 21. When the electric cylinder 19 drives the slot push plate 20 to snap into the annular groove 21, the nozzle body 8 is fixed between the mounting frame 7. The side end of the mounting frame 7 is also provided with a cutting groove 22, and the cutting groove 22 is arranged above the mounting slot 18. The cutting member 12 includes an annular cutter 23, and the annular cutter 23 is also fixed It is arranged at the output end of the electric cylinder 19 and is slidably arranged in the cutting groove 22. A cutting hole 24 is opened on the annular cutter 23, and a cutting blade 25 is arranged on one side of the cutting hole 24. When the nozzle body 8 needs to be replaced, the electric cylinder 19 drives the slot push plate 20 and the annular cutter 23 to move at the same time. At this time, the annular cutter 23 cuts off the unmelted wire material to separate the unmelted wire material from the nozzle body 8. At this time, the nozzle body 8 will not pull the unmelted wire material after it is detached from the installation slot 18. The electric cylinder 19 drives the slot push plate 20 to fix the other nozzle body 8 while returning the annular cutter 23 to its original position.

[0031] The driving member 13 includes a servo motor 26, a driving roller 27 and four driven rollers 28. The driving roller 27 and the driven roller 28 are arranged at the lower end of the input hole 9. There is a gap between the driving roller 27 and the driven roller 28. The wire hangs down and passes through the gap between the driving roller 27 and the driven roller 28. The driving roller 27 is fixed to the output end of the servo motor 26. Four roller ring grooves 29 are opened on the driving roller 27. A center rod 30 is also arranged in the mounting frame 7. The center rod 30 is square. The middle of the driven roller 28 is evenly spaced. A square groove 31 is provided, and the square groove 31 and the center rod 30 are slidably matched. A spring 32 is also provided between the square groove 31 and the center rod 30. An outer roller ring 33 is also provided on the outside of the driven roller 28. A self-lubricating ring 34 is provided between the outer roller ring 33 and the driven roller 28. The outer roller ring 33 rotates around the driven roller 28. A pressure roller assembly 35 is also provided on the side of the driven roller 28 away from the active roller 27. The pressure roller assembly 35 is used to push a certain driven roller 28 toward the active roller 27 and make the outer roller ring 33 fit the active roller 27.

[0032] like Figure 4 , Figure 7 As shown, the pressure roller assembly 35 includes a supporting shell 36 and a plurality of push rods 37. The supporting shell 36 is arranged on the outside of the mounting frame 7. A push roller 38 is arranged at one end of the push rod 37. The push roller 38 is rotatably arranged at its end. A slider 42 is fixedly arranged at the side end of the push rod 37. A cavity 40 is opened in the supporting shell 36. The push roller 38 is arranged in the cavity 40. A sliding hole 41 is opened at the side end of the cavity 40. The push rod 37 passes through the sliding hole 41. A limiting groove 39 cooperating with the slider 42 is arranged at the side wall of the sliding hole 41. The slider 42 and the limiting groove 39 are both square and are used to limit the rotation of the push rod 37. A threaded hole 43 is also arranged at the bottom of the sliding hole 41. A push plate 44 is arranged in the threaded hole 43. The push plate 44 is threadedly connected with the threaded hole 43 and abuts against the push rod 37. An adjusting component 45 for driving the push plate 44 to rotate is also arranged at the nozzle replacement component 14.

[0033] When a wire of a certain color needs to move toward the nozzle body 8, the adjustment component 45 drives the corresponding push rod 37 to move toward the driven roller 28, so that the push roller 38 presses against the corresponding driven roller 28, and the driven roller 28 moves toward the active roller 27. At this time, the square groove 31 inside the driven roller 28 compresses the spring 32, and the outer roller ring 33 outside the driven roller 28 presses the wire in the roller ring groove 29. When the active roller 27 rotates, the outer roller ring 33 is driven to rotate by friction and the wire is fed into the nozzle body 8. When it is necessary to replace the wire of another color, the adjustment component 45 drives the push plate 44 originally moving toward the driven roller 28 to move back. At this time, the elastic energy stored in the spring 32 between the square groove 31 and the center rod 30 is released, pushing the driven roller 28 and the push rod 37 back, and then pushing the driven roller 28 corresponding to the required color wire to move.

[0034] The adjustment component 45 includes a mounting platform 49 and four servo motors 46 arranged on the mounting platform 49. The output ends of the servo motors 46 are all provided with hexagonal heads 47. The push plate 44 is provided with a hexagonal slot 48. When the color of the wire needs to be changed, the XZ axis moving component 3 and the Y axis moving component 4 drive the mounting frame 7 to move to the adjustment component 45. The turntable 15 rotates the required nozzle body 8 to the replacement station in advance. The hexagonal head 47 is arranged above the replacement station. When the nozzle body 8 is replaced, the XZ axis moving component 3 and the Y axis moving component 4 drive the mounting frame 7 to move to the adjustment component 45. The dynamic support shell 36 moves to the corresponding position of the hexagonal head 47, the center distance between the output ends of the four servo motors 46 is consistent with the center distance between the threaded holes 43 opened on the support shell 36, the XZ-axis moving assembly 3 drives the support housing to move toward the hexagonal head 47 and pushes the hexagonal head 47 into the hexagonal groove 48, and the servo motor 46 drives the hexagonal head to rotate to complete the adjustment of the corresponding driven roller 28. Four servo motors are used to make the angle between the hexagonal head and its corresponding hexagonal groove 48 consistent to prevent equipment damage caused by the different angles between the hexagonal head and the hexagonal groove 48.

[0035] Embodiment 2:

[0036] A printing process of a high-speed multi-nozzle FDM printer comprises the following steps: Step 1: Model design: model building or scanning the model and determine the color of each part of the model; Step 2: Slice the model. Slice the designed 3D model and generate G code and M code for each slice. Step 3, select the printing material, introduce wires of different colors into the input hole 9, and make the wires pass through the driving member 13; Step 4: Set the printing parameters, prepare the nozzle bodies 8 that match the number of wire types and put them into the storage holes 16, and add the position information of the nozzle bodies 8 into the M code so that the M code corresponds to the position of the nozzle bodies 8, and set the printing speed, printing temperature and printing accuracy at the same time; Step 5: Start printing.

[0037] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A high-speed multi-nozzle FDM printer, comprising a machine platform (1) and a material bin (2) arranged at the rear side of the machine platform (1), the machine platform (1) being provided with an XZ axis moving component (3) and a Y axis moving component (4), the output end of the XZ axis moving component (3) being provided with a nozzle component (5), the Y axis moving component (4) being arranged in the middle of the machine platform (1), and the output end thereof being provided with a processing platform (6), wherein: The nozzle assembly (5) comprises a mounting frame (7) fixedly arranged at the output end of the XZ axis moving assembly (3) and a nozzle body (8) detachably arranged on the mounting frame (7); a plurality of input holes (9) for wires to pass through are provided at the upper end of the mounting frame (7); a mounting groove (10) is provided at the bottom of the mounting frame (7); a fixing member (11), a cutting member (12) and a driving member (13) are also provided at the side end of the mounting frame (7); the fixing member (11) is used to fix the nozzle body (8) in the mounting groove (10); the cutting member (12) is used to cut the wire; the driving member (13) is used to drive the wire to move toward the nozzle body (8); a nozzle replacement assembly (14) is also provided on the processing platform (6); a plurality of nozzle bodies (8) are provided on the nozzle replacement assembly (14); and different nozzle bodies (8) correspond to wires of different colors.

2. A high-speed multi-nozzle FDM printer according to claim 1, characterized in that: The nozzle replacement assembly (14) comprises a turntable (15), a plurality of placement holes (16) are provided on the turntable (15), the nozzle body (8) is arranged in the placement hole (16), and a heat preservation ring (17) is arranged in the placement hole (16).

3. A high-speed multi-nozzle FDM printer according to claim 1, characterized in that: The side end of the mounting frame (7) is also provided with a mounting slot (18); the fixing member (11) comprises an electric cylinder (19) and a slot push plate (20); the electric cylinder (19) is fixedly arranged at the side end of the mounting frame (7); the slot push plate (20) is fixedly arranged at the output end of the electric cylinder (19) and is slidably arranged in the mounting slot (18); a ring groove (21) is arranged at the rear end of the nozzle body (8); when the electric cylinder (19) drives the slot push plate (20) to snap into the ring groove (21), the nozzle body (8) is fixed to the mounting frame (7).

4. A high-speed multi-nozzle FDM printer according to claim 3, characterized in that: The side end of the mounting frame (7) is also provided with a cutting groove (22), and the cutting member (12) comprises an annular cutter (23) arranged at the output end of the electric cylinder (19), the annular cutter (23) being slidably arranged in the cutting groove (22), a cutting hole (24) being provided on the annular cutter (23), and a cutting blade (25) being arranged on one side of the cutting hole (24).

5. A high-speed multi-nozzle FDM printer according to claim 1, characterized in that: The driving member (13) comprises a servo motor (26), a driving roller (27) and a plurality of driven rollers (28). The driving roller (27) and the driven roller (28) are arranged at the lower end of the input hole (9). The wire passes between the driving roller (27) and the driven roller (28). The driving roller (27) is fixed to the output end of the servo motor (26). The driving roller (27) is provided with a plurality of roller ring grooves (29). The number of the driven rollers (28) is the same as the number of the roller ring grooves (29). The mounting frame (7) is also provided with a central A core rod (30), a square groove (31) is provided in the middle of each driven roller (28), the square groove (31) and the center rod (30) are slidably matched, a spring (32) is provided between the square groove (31) and the center rod (30), an outer roller ring (33) is provided on the outer side of the driven roller (28), and a pressure roller assembly (35) is provided on the side of the driven roller (28) away from the active roller (27), and the pressure roller assembly (35) is used to push the driven roller (28) toward the active roller (27) and make it fit with the active roller (27).

6. A high-speed multi-nozzle FDM printer according to claim 5, characterized in that: The pressure roller assembly (35) comprises a supporting shell (36) and a plurality of push rods (37). A push roller (38) is arranged at one end of the push rod (37), and a slider (42) is fixedly arranged at the side end. A cavity (40) is provided in the supporting shell (36), and the push roller (38) is arranged in the cavity (40). A sliding hole (41) is provided at the side end of the cavity (40). A limiting groove (39) cooperating with the slider (42) is provided at the side wall of the sliding hole (41). A threaded hole (43) is also provided at the bottom of the sliding hole (41). A push plate (44) is provided in the threaded hole (43). The push plate (44) is threadedly connected to the threaded hole (43) and abuts against the push rod (37). An adjusting assembly (45) for driving the push plate (44) to rotate is also provided at the nozzle replacement assembly (14).

7. A high-speed multi-nozzle FDM printer according to claim 6, characterized in that: The adjustment assembly (45) comprises a mounting platform (49) and a plurality of servo motors (46) arranged on the mounting platform (49), the output ends of the servo motors (46) are all provided with hexagonal heads (47), and the push plate (44) is provided with a hexagonal groove (48).

8. A printing process for a high-speed multi-nozzle FDM printer, characterized by: Using a high-speed multi-jet FDM printer as described in any one of claims 1 to 7 comprises the following steps: Step 1: Model design: model building or scanning the model and determine the color of each part of the model; Step 2: Slice the model. Slice the designed 3D model and generate G code and M code for each slice. Step 3, select the printing material, introduce wires of different colors into the input hole (9), and make the wires pass through the driving member (13); Step 4, setting printing parameters, preparing a nozzle body (8) of the same number as the type of wire material and placing it in the storage hole (16), and adding the position information of the nozzle body (8) to the M code so that the M code corresponds to the position of the nozzle body (8), and setting the printing speed, printing temperature and printing accuracy at the same time; Step 5: Start printing.

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