Anti-clogging multi-color nozzle 3D printer

Abstract

The present application relates to the technical field of 3D printing, in particular to a multi-color nozzle 3D printer capable of preventing blockage, comprising a printer body, a discharging assembly and a feeding assembly; the discharging assembly comprises a discharging shell, a heating block, a heat insulation plate and a crushing assembly; the crushing assembly comprises a crushing groove, a crushing disc and a filter plate; the crushing groove is arranged in the inner cavity of the discharging shell; the filter plate is arranged inside the crushing groove; the crushing disc is arranged above the filter plate; a first motor is arranged in the motor mounting block. The crushing disc is provided with a ring groove with protrusions, and is guided by a rolling rod fixed at the bottom of the crushing disc, so that the crushing disc can periodically rise and fall when rotating, so that the consumables can quickly reach above the filter plate for crushing treatment when the crushing disc rises, thereby ensuring that the consumables are fully crushed into small particles, and the subsequent consumables can be replenished in time, without affecting the normal printing work.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of 3D printing technology, in particular to a multi-color nozzle 3D printer capable of preventing blockage. BACKGROUND

[0002] 3D printing is a kind of rapid prototyping technology, also known as additive manufacturing, which is a technology that uses digital model files to construct objects through layer-by-layer printing using powder-like metal or plastic and other materials that can be bonded. 3D printing is usually achieved using a digital technology material printer. It is commonly used in mold manufacturing, industrial design and other fields to manufacture models, and gradually used for the direct manufacturing of some products. There are parts printed by this technology. The technology is used in jewelry, footwear, industrial design, architecture, engineering and construction, automobiles, aerospace, dental and medical industry, education, geographic information systems, civil engineering, guns and other fields.

[0003] The current 3D printer is to feed the filament into the head through the throat, and then melt it through the heating device. The feeding throat is usually made of stainless steel with slow thermal conductivity, while the nozzle is made of brass with fast thermal conductivity. Therefore, the melting process of the solid filament is carried out in the nozzle, and some larger granular filaments cannot be melted in time and will block the nozzle, preventing the melted filament from being sprayed out. Once the nozzle is blocked, the 3D printing cannot continue, and the staff needs to clean the nozzle before the printing can continue, which greatly increases the printing time.

[0004] Therefore, in order to prevent larger particles from melting in time, many devices are equipped with a crushing device inside the nozzle to crush the internal particles, thereby crushing the larger particles into small particles to ensure that the consumables can be quickly melted.

[0005] However, most of the existing technologies do not crush the larger granular consumables comprehensively, and often leave some consumables inside, which needs to be disassembled and cleaned, increasing unnecessary working time, and the printing cannot be multi-color printing, but only single-color printing, which limits the printer. SUMMARY

[0006] In view of the above problems, a multi-color nozzle 3D printer capable of preventing blockage is provided, which is equipped with a crushing disc inside the nozzle, and the crushing disc is equipped with a ring groove with protrusions, so that the crushing disc moves up and down periodically under the drive of the rolling rod, thereby crushing the consumables comprehensively.

[0007] To solve the problems of the prior art, the technical scheme adopted by the present application is:

[0008] The utility model provides an anti -blocking multicolor spray head 3D printer, including printer body, discharge assembly and feeding assembly, printer body includes a pair of parallel printer side wall and first drive assembly and second drive assembly for driving discharge assembly moves on the horizontal plane, first drive assembly is connected with feeding assembly through the connecting block, discharge assembly includes discharge casing, heating block, heat insulating plate and rubbing assembly, discharge casing is fixedly connected with feeding assembly, discharge casing is hollow structure, the top of discharge casing inner chamber is equipped with motor mounting block, the bottom of discharge casing inner chamber is equipped with discharge port, heating block is fixed above the discharge port, heat insulating plate is set on heating block, rubbing assembly includes rolling groove, rolling disc and filter plate, rolling groove is set in the inner chamber of discharge casing and is located above heat insulating plate, and the intercommunication between rolling groove, heat insulating plate, heating block and discharge port, filter plate is arranged in the inside of rolling groove, and rolling disc is arranged above filter plate, and motor mounting block is equipped with first motor, and first motor is connected with rolling disc.

[0009] Preferably, the fixing assembly further comprises a rotating disc and a rolling rod; the rotating disc is arranged at the bottom of the motor mounting block, and a support plate is arranged at the bottom of the rotating disc; the rolling rod is rotatably connected with the support plate; the rolling disc is provided with an annular groove matched with the rolling rod, and the rolling rod slides in the annular groove.

[0010] Preferably, a mortise is arranged on the output shaft of the first motor, and a tenon is arranged on the rolling disc matched with the mortise; the rolling disc moves on the output shaft of the first motor through the cooperation between the mortise and the tenon.

[0011] Preferably, the feeding assembly comprises a feeding platform and a servo cylinder; the feeding platform is fixed at the top end of the discharge casing, and a through hole is arranged on the feeding platform and communicates with the space above the filter plate; the servo cylinder is arranged in the feeding platform, and a partition plate is arranged on the output end of the servo cylinder; the partition plate is inserted into the through hole through the servo cylinder.

[0012] Preferably, a feeding pipe is arranged in the discharge casing; one end of the feeding pipe communicates with the through hole, and the other end of the feeding pipe communicates with the space above the filter plate.

[0013] Preferably, the feeding assembly further comprises a connecting shaft arranged on the feeding platform; the connecting shaft and the connecting block are provided with matched connecting holes, and the connecting shaft and the connecting block are detachably fixedly connected through the threaded connection between the connecting shaft and the connecting holes.

[0014] Preferably, the first driving assembly comprises a first sliding rail, a second motor and a first screw rod; the first sliding rail is arranged between a pair of printer side walls, and two ends of the first sliding rail are connected with the printer side walls respectively; the second motor is fixed in the first sliding rail; one end of the first screw rod is fixedly connected with an output shaft of the second motor, and the other end of the first screw rod is rotatably connected with the first sliding rail; the first screw rod passes through a connecting block arranged at the bottom of the first sliding rail and is threadedly connected with the connecting block.

[0015] Preferably, the second driving assembly comprises a first sliding groove, a third motor and a second screw rod; the first sliding groove is arranged on the inner side of the printer side wall respectively; the third motor is arranged in the first sliding groove; one end of the second screw rod is fixedly connected with an output end of the third motor, and the other end of the second screw rod is rotatably connected with the first sliding groove; the second screw rod passes through the first sliding rail and is threadedly connected with the first sliding rail.

[0016] Preferably, a threaded water channel is arranged in the discharge shell; a through hole penetrating to the threaded water channel is arranged on the outer wall of the discharge shell, and a quick release connector is arranged in the through hole of the discharge shell.

[0017] Preferably, one end of the first sliding groove penetrates the printer side wall and is provided with a mounting block at the penetrating position; the end of the second screw rod away from the third motor is rotatably connected with the mounting block.

[0018] The beneficial effects of the present application compared with the prior art are:

[0019] 1、The present application is provided with a raised annular groove on the rolling disc, and the rolling disc is guided by the rolling rod fixed at the bottom of the disc, so that the rolling disc can periodically rise and fall during rotation, so that the consumables can quickly reach above the filter plate for crushing treatment when the rolling disc rises, thereby ensuring that the consumables are fully crushed into fine particles, and the subsequent consumables can be replenished in time, without affecting the normal printing work.

[0020] 2、The present application inserts the partition plate into the through hole by the servo air cylinder, so as to block the replenishment of consumables in the nozzle, and controls the servo motor at the other position to move away the partition plate at the other position, so as to replace the consumables in the nozzle, thereby realizing multi-color printing.

[0021] 3、The present application is provided with a threaded water channel in the discharge shell, so that cooling water is injected into the discharge shell by an external device, so as to exchange heat between the cooling water and the heating block, thereby rapidly cooling the nozzle. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a kind of anti-blocking multi-color nozzle 3D printer Figure 1 ;

[0023] Figure 2 is a perspective view of a clogging-preventing multi-color jet 3D printer Figure 2 ;

[0024] Figure 3 is a perspective view of the outfeed assembly and the infeed assembly;

[0025] Figure 4 is a perspective exploded view of the outfeed assembly and the infeed assembly;

[0026] Figure 5 is Figure 4 a partial enlarged view at A in FIG. 1;

[0027] Figure 6 is a front sectional view of the outfeed assembly and the infeed assembly;

[0028] Figure 7 is Figure 6 a partial enlarged view at B in FIG. 1;

[0029] Figure 8 is Figure 6 a partial enlarged view at C in FIG. 1;

[0030] Figure 9 is a perspective view of the first driving assembly;

[0031] Figure 10 is a perspective view of the second driving assembly.

[0032] Reference numerals in the drawings are:

[0033] 1 - printer body;

[0034] 11 - printer side wall;

[0035] 12 - first driving assembly;

[0036] 121 - first sliding rail;

[0037] 122 - second motor;

[0038] 123 - first screw rod;

[0039] 13 - second driving assembly;

[0040] 131 - first sliding groove;

[0041] 132 - third motor;

[0042] 133 - second screw rod;

[0043] 14 - connecting block;

[0044] 15 - mounting block;

[0045] 2 - outfeed assembly;

[0046] 21-discharge shell;

[0047] 211-feeding pipe;

[0048] 212-threaded waterway;

[0049] 213-quick release joint;

[0050] 22-discharge port;

[0051] 23-heating block;

[0052] 24-insulation plate;

[0053] 25-crushing assembly;

[0054] 251-rolling groove;

[0055] 252-filtering plate;

[0056] 253-rolling disc;

[0057] 2531-tenon;

[0058] 254-fixed disc;

[0059] 255-supporting plate;

[0060] 256-rolling rod;

[0061] 26-motor mounting block;

[0062] 27-first motor;

[0063] 271-mortise;

[0064] 3-feeding assembly;

[0065] 31-feeding platform;

[0066] 311-through hole;

[0067] 32-servo cylinder;

[0068] 33-partition plate;

[0069] 34-connecting shaft;

[0070] 341-connecting hole;

[0071] 4-consumable cartridge. DETAILED DESCRIPTION

[0072] In order to further understand the features, technical means and specific purposes and functions of the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0073] Referring toFigure 1 Figure 4 As shown in the drawings, the present application provides:

[0074] The anti-clogging multi-color nozzle 3D printer comprises a printer body 1, a discharge assembly 2 and a feeding assembly 3, the printer body 1 comprises a pair of parallel printer side walls 11 and a first driving assembly 12 and a second driving assembly 13 for driving the discharge assembly 2 to move on the horizontal plane, the first driving assembly 12 is connected with the feeding assembly 3 through a connecting block 14; the discharge assembly 2 comprises a discharge shell 21, a heating block 23, a heat insulation plate 24 and a crushing assembly 25; the discharge shell 21 is fixedly connected with the feeding assembly 3, the discharge shell 21 is a hollow structure, a motor mounting block 26 is arranged at the top of the inner cavity of the discharge shell 21, and a discharge port 22 is arranged at the bottom of the inner cavity of the discharge shell 21; the heating block 23 is fixed above the discharge port 22; the heat insulation plate 24 is sleeved on the heating block 23; the crushing assembly 25 comprises a crushing groove 251, a crushing disc 253 and a filter plate 252; the crushing groove 251 is arranged in the inner cavity of the discharge shell 21 and above the heat insulation plate 24, and the crushing groove 251, the heat insulation plate 24, the heating block 23 and the discharge port 22 are communicated; the filter plate 252 is arranged inside the crushing groove 251; the crushing disc 253 is arranged above the filter plate 252; the motor mounting block 26 is internally provided with a first motor 27, and the first motor 27 is connected with the crushing disc 253.

[0075] When the 3D printer is working, various sizes of granular consumables are moved above the filter plate 252, the small consumables in the granular consumables can directly pass through the filter plate 252 to the feeding port, and then are sprayed out after being heated by the heating block 23, so as to perform corresponding printing work, and the large granular consumables are retained on the filter plate 252, and then the crushing disc 253 is driven to rotate by the first motor 27, so as to crush the granular consumables on the filter plate 252, thereby crushing the large granular consumables into small granular consumables, so that the consumables can pass through the filter plate 252 to enter the discharge port 22 and be heated and sprayed out, thereby avoiding that the large granular consumables cannot be timely melted by the heating block 23, causing the discharge port 22 to be blocked.

[0076] Referring to Figure 5 As shown in the drawings:

[0077] The fixing assembly further comprises a rotating disc and a rolling rod 256; the fixing disc 254 is arranged at the bottom of the motor mounting block 26, the bottom of the fixing disc 254 is provided with a supporting plate 255, and the rolling rod 256 is rotatably connected with the supporting plate 255; the crushing disc 253 is provided with an annular groove matched with the rolling rod 256, and the rolling rod 256 slides in the annular groove.

[0078] ​The annular groove is provided with multiple protrusions, so that when the rolling rod 256 moves along the protrusions, the rolling disc 253 can be temporarily lifted, and then falls back to the initial position again, until the rolling rod 256 moves to the protrusions again to repeat the lifting and falling. In this way, the rolling disc 253 can be lifted periodically while rotating under the drive of the first motor 27, so that the granular consumables can quickly enter above the filter plate 252 when the rolling disc 253 is lifted, and then be crushed by the falling rolling disc 253. In this way, enough consumables can reach the discharge port 22 for printing work, so as to avoid discontinuous printing work.

[0079] Referring to Figure 6 and Figure 7 as shown:

[0080] The output shaft of the first motor 27 is provided with a mortise 271, and the rolling disc 253 is provided with a tenon 2531 matched with the mortise 271. The rolling disc 253 moves on the output shaft of the first motor 27 through the cooperation between the mortise 271 and the tenon 2531.

[0081] When the first motor 27 drives the rolling disc 253 to rotate, the cooperation between the mortise 271 and the tenon 2531 ensures that the rolling disc 253 can rotate synchronously with the first motor 27 when it is sleeved on the output shaft of the first motor 27, so as to avoid the situation that the granular consumables on the filter plate 252 cannot be crushed due to asynchronous rotation of the rolling disc 253. Therefore, the cooperation between the mortise 271 and the tenon 2531 ensures that the consumables on the filter plate 252 can be well crushed, so as to continuously supply the consumables to the discharge port 22 for printing work, ensuring that the printing work can be continuously performed without affecting the normal work and causing efficiency to decrease.

[0082] Referring to Figure 6 and Figure 8 as shown:

[0083] The feeding assembly 3 comprises a feeding platform 31 and a servo cylinder 32. The feeding platform 31 is fixed to the top end of the discharge housing 21, and the feeding platform 31 is provided with a through hole 311 penetrating the feeding platform 31, which is in communication with the space above the filter plate 252. The servo cylinder 32 is arranged in the interior of the feeding platform 31, and the output end of the servo cylinder 32 is provided with a partition plate 33. The partition plate 33 is inserted into the through hole 311 by the servo cylinder 32.

[0084] The staff will fix the consumable cylinder 4 on the through hole 311, so as to provide the consumables required for printing, and a plurality of through holes 311 can be arranged on the feeding platform 31 to perform multi-color printing work. The servo cylinder 32 arranged inside the feeding platform 31 can insert the partition plate 33 arranged on the output end thereof into the through hole 311 in the working state, so as to block the consumables passing through the through hole 311 on the partition plate 33, and control the servo motor at another position to work to extract the partition plate 33, so that the consumables can reach the filter plate 252, and then enter the discharge port 22 to be heated and sprayed out. Different servo cylinders 32 are used to change the consumables in the nozzle to perform multi-color printing work.

[0085] Referring to Figure 8 As shown in the figure:

[0086] The discharge shell 21 is internally provided with a feeding pipe 211; one end of the feeding pipe 211 is in communication with the through hole 311, and the other end of the feeding pipe 211 is in communication with the space above the filter plate 252.

[0087] After the staff installs the consumable cylinder 4 on the feeding platform 31, the servo cylinder 32 of the corresponding channel is controlled to extract the partition plate 33, so that the consumables in the consumable cylinder 4 can enter the feeding pipe 211 through the through hole 311, and the consumables are sent to the filter plate 252 through the feeding pipe 211 for crushing work.

[0088] Referring to Figure 6 As shown in the figure:

[0089] The feeding assembly 3 further comprises a connecting shaft 34 arranged on the feeding platform 31; the connecting shaft 34 and the connecting block 14 are provided with matching connecting holes 341, and the connecting shaft 34 and the connecting block 14 are detachably fixedly connected through the threaded connection between the bolts and the connecting holes 341.

[0090] The threaded connection between the bolts and the connecting holes 341 between the connecting shaft 34 and the connecting block 14 makes the feeding platform 31 not rotate when it is installed below the connecting block 14, so as to affect the normal printing work, and the connecting block 14 is slidably connected with the first driving assembly 12, so that the nozzle can move and print under the driving of the first driving assembly 12.

[0091] Referring to Figure 9 As shown in the figure:

[0092] The first driving assembly 12 comprises a first slide rail 121, a second motor 122 and a first screw rod 123. The first slide rail 121 is arranged in the middle of the pair of printer side walls 11, and the two ends of the first slide rail 121 are connected with the printer side walls 11 respectively. The second motor 122 is fixed in the interior of the first slide rail 121. One end of the first screw rod 123 is fixedly connected with the output shaft of the second motor 122, and the other end of the first screw rod 123 is rotatably connected with the first slide rail 121. The first screw rod 123 passes through the connecting block 14 arranged at the bottom of the first slide rail 121 and is threadedly connected with the connecting block 14.

[0093] The nozzle is arranged at the bottom of the first slide rail 121 through the connecting block 14, and the connecting block 14 is threadedly connected with the first screw rod 123. Thus, when the second motor 122 drives the first screw rod 123 to rotate, the nozzle can be driven to move along the length direction of the first slide rail 121. The second motor 122 is a stepping motor. Thus, the moving distance of the nozzle can be more accurately controlled through the control of the stepping motor, and the stepping motor will not accumulate errors in the case of long-time work, so as to ensure that the printed object is more consistent with various parameters when setting, thereby improving the yield of the printing device.

[0094] Referring to Figure 10

[0095] The second driving assembly 13 comprises a first slide groove 131, a third motor 132 and a second screw rod 133. The first slide groove 131 is arranged at the inner side of the printer side wall 11 respectively. The third motor 132 is arranged in the interior of the first slide groove 131. One end of the second screw rod 133 is fixedly connected with the output end of the third motor 132, and the other end of the second screw rod 133 is rotatably connected with the first slide groove 131. The second screw rod 133 passes through the first slide rail 121 and is threadedly connected with the first slide rail 121.

[0096] The third motor 132 is a stepping motor. When the nozzle moves along the length direction of the first slide rail 121 under the driving of the second motor 122, the third motor 132 starts to work, so as to drive the second screw rod 133 to rotate, thereby driving the first slide rail 121 threadedly connected with the second screw rod 133 to move. The moving direction is perpendicular to the length direction of the first slide rail 121. Thus, through the cooperation between the first driving assembly 12 and the second driving assembly 13, the nozzle can be quickly moved above the printing platform for corresponding printing work.

[0097] Referring to Figure 6

[0098] ​​The inside of the discharge shell 21 is provided with a threaded water channel 212; the outer wall of the discharge shell 21 is provided with a through hole penetrating to the threaded water channel 212, and the through hole on the discharge shell 21 is provided with a quick release connector 213.

[0099] Since the nozzle needs to heat the consumables at the discharge port 22 by the heating block 23 to melt and then spray for corresponding printing work, a large amount of heat energy needs to be dissipated during the use of the nozzle, so the threaded water channel 212 is arranged on the discharge shell 21, and the quick release connector 213 is connected with the threaded water channel 212, so that the external equipment is connected with the quick release connector 213 and the cooling water is injected into the threaded water channel 212, so that the heat released by the heating block 23 is taken out, thereby cooling the nozzle, and the internal circulating water channel is arranged in a spiral shape, so that the cooling water can fully exchange heat with the heating block 23, thereby ensuring that the temperature of the nozzle will not be too high to affect the normal work of the printer.

[0100] Referring to Figure 10

[0101] One end of the first sliding groove 131 penetrates the printer side wall 11 and the penetration is provided with a mounting block 15; the second screw rod 133 is rotationally connected with the mounting block 15 away from one end of the third motor 132.

[0102] Since one end of the first sliding groove 131 directly penetrates the printer side wall 11, it is convenient to install the first sliding rail 121 to the middle of the pair of printer side walls 11, after the first sliding rail 121 is installed inside the printer side wall 11, the mounting block 15 is inserted into the opening of the first sliding groove 131, and the mounting block 15 is fixed in the opening of the printer side wall 11 by bolts, so as to close the first sliding groove 131, so as to prevent the first sliding rail 121 from flying out of the opening of the printer side wall 11 and causing damage to the printer when the third motor 132 malfunctions.

[0103] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.​

Claims

1. A clogging-preventing multi-color nozzle 3D printer, comprising a printer body (1), a discharging assembly (2) and a feeding assembly (3), the printer body (1) comprising a pair of parallel printer side walls (11) and a first driving assembly (12) and a second driving assembly (13) for driving the discharging assembly (2) to move on a horizontal plane, the first driving assembly (12) being connected with the feeding assembly (3) through a connecting block (14); the discharging assembly (2) comprising a discharging shell (21), a heating block (23), a heat insulation plate (24) and a crushing assembly (25); the discharging shell (21) being fixedly connected with the feeding assembly (3), the discharging shell (21) being of a hollow structure, a motor mounting block (26) being arranged at the top of the inner cavity of the discharging shell (21), and a discharging port (22) being arranged at the bottom of the inner cavity of the discharging shell (21); the heating block (23) being fixed above the discharging port (22); the heat insulation plate (24) being sleeved on the heating block (23); the crushing assembly (25) comprising a crushing groove (251), a crushing disc (253) and a filter plate (252); the crushing groove (251) being arranged in the inner cavity of the discharging shell (21) and above the heat insulation plate (24), the crushing groove (251), the heat insulation plate (24), the heating block (23) and the discharging port (22) being in communication with each other; the filter plate (252) being arranged inside the crushing groove (251); the crushing disc (253) being arranged above the filter plate (252); the motor mounting block (26) being internally provided with a first motor (27), the first motor (27) being connected with the crushing disc (253); the fixing assembly further comprising a rotating disc and a rolling rod (256); the fixing disc (254) being arranged at the bottom of the motor mounting block (26), the bottom of the fixing disc (254) being provided with a support plate (255); the rolling rod (256) being rotatably connected with the support plate (255); the crushing disc (253) being provided with an annular groove matched with the rolling rod (256), and the rolling rod (256) sliding in the annular groove; the output shaft of the first motor (27) being provided with a mortise (271), and the crushing disc (253) being provided with a tenon (2531) matched with the mortise (271); the crushing disc (253) moving on the output shaft of the first motor (27) through the cooperation between the mortise (271) and the tenon (2531); the feeding assembly (3) comprising a feeding platform (31) and a servo cylinder (32); the feeding platform (31) being fixed at the top end of the discharging shell (21), the feeding platform (31) being provided with a through hole (311) penetrating through the feeding platform (31), the through hole (311) being in communication with the space above the filter plate (252); the servo cylinder (32) being arranged inside the feeding platform (31), the output end of the servo cylinder (32) being provided with a partition plate (33); the partition plate (33) being inserted into the through hole (311) through the servo cylinder (32); the inner cavity of the discharging shell (21) being provided with a feeding pipe (211). characterized in that ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. A clog resistant multi-color jet 3D printer according to claim 1, wherein, ​ ​ 3. A clog resistant multi-color jet 3D printer according to claim 1, wherein, ​ ​ ​ ​ 4. A clog resistant multi-color jet 3D printer according to claim 3, wherein, ​ One end of the feeding pipe (211) is communicated with the through hole (311), and the other end of the feeding pipe is communicated with the space above the filter plate (252).

5. A clog resistant multi-color jet 3D printer according to claim 3, wherein, The feeding assembly (3) further comprises a connecting shaft (34) arranged on the feeding platform (31); The connecting shaft (34) and the connecting block (14) are provided with matched connecting holes (341), and the connecting shaft (34) and the connecting block (14) are detachably fixed and connected through threaded connection between the bolt and the connecting hole (341).

6. A clog resistant multi-color jet 3D printer according to claim 1, wherein, The first driving assembly (12) comprises a first sliding rail (121), a second motor (122) and a first screw rod (123); The first sliding rail (121) is arranged in the middle of the pair of printer side walls (11), and two ends of the first sliding rail (121) are connected with the printer side walls (11) respectively; The second motor (122) is fixed in the interior of the first sliding rail (121); One end of the first screw rod (123) is fixedly connected with the output shaft of the second motor (122), and the other end of the first screw rod (123) is rotatably connected with the first sliding rail (121); The first screw rod (123) penetrates through the connecting block (14) arranged at the bottom of the first sliding rail (121) and is threadedly connected with the connecting block (14).

7. A clog resistant multi-color jet 3D printer according to claim 6, wherein, The second driving assembly (13) comprises a first sliding groove (131), a third motor (132) and a second screw rod (133); The first sliding groove (131) is arranged on the inner side of the printer side wall (11) respectively; The third motor (132) is arranged in the interior of the first sliding groove (131); One end of the second screw rod (133) is fixedly connected with the output end of the third motor (132), and the other end of the second screw rod (133) is rotatably connected with the first sliding groove (131); The second screw rod (133) penetrates through the first sliding rail (121) and is threadedly connected with the first sliding rail (121).

8. A clog resistant multi-color jet 3D printer according to claim 1, wherein, The interior of the discharging shell (21) is provided with a threaded water channel (212); The outer wall of the discharging shell (21) is provided with a through hole penetrating into the threaded water channel (212), and the through hole on the discharging shell (21) is provided with a quick release connector (213).

9. A clog resistant multi-color jet 3D printer according to claim 7, wherein, One end of the first sliding groove (131) penetrates through the printer side wall (11) and is provided with a mounting block (15) at the penetrating position; The end of the second screw rod (133) away from the third motor (132) is rotatably connected with the mounting block (15).

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