A 3D printer and a resetting device thereof

Abstract

The invention discloses a 3D printer and a resetting device thereof, and relates to the technical field of 3D printers. The 3D printer comprises a gantry mechanism and a print head mechanism, wherein the print head mechanism is arranged on the gantry mechanism; the print head mechanism comprises an extrusion assembly, a nozzle assembly and a heat dissipation assembly connected to the nozzle assembly; the nozzle assembly comprises a throat connected to the extrusion assembly, a heating block arranged at the lower end of the throat and a nozzle connected to the heating block, an inclined hole is provided on the side of the nozzle, and a blocking member is placed inside the inclined hole; a cleaning mechanism for cleaning the nozzle is also fixedly arranged on the gantry mechanism, and the cleaning mechanism comprises a stirring assembly arranged corresponding to the nozzle extrusion port and a cleaning assembly arranged corresponding to the inclined hole; the stirring assembly extends into the interior of the nozzle to stir the raw material, and then cooperates with the cleaning assembly extended into the interior of the inclined hole to absorb the raw material; the invention improves the cleaning effect and cleaning efficiency of consumables or impurities inside the nozzle.

Description

Technical Field

[0001] The present invention relates to the technical field related to 3D printers, and in particular to a 3D printer and a resetting device thereof. Background Art

[0002] A 3D printer is a device that can convert digital models into solid three-dimensional objects. It constructs objects by stacking materials layer by layer and is widely used in prototyping, product development, education, art creation, medical treatment and other fields. Existing 3D printing technologies are mainly divided into fused deposition modeling, photo-stereolithography and electron beam melting. Among them, fused deposition modeling is widely used due to its low cost and ease of use. The main method is to deliver thermoplastic material into the nozzle, transport the material along the nozzle to the heating part, melt it, and then extrude it layer by layer to form an object.

[0003] Generally, filamentary filaments are introduced into the heating tube through the guidance of the extruder and heated until they are melted. However, since the heating component heats the filaments gradually from the outside to the inside, the internal melting of the filaments is uneven, resulting in unmelted block filaments inside the heating tube, causing the nozzle to be blocked when the melted filaments are extruded, affecting the subsequent work of the 3D printer. In addition, the filaments contain impurities that do not melt due to temperature. The long-term accumulation of impurities will also cause the nozzle to be blocked.

[0004] In order to clean impurities or unmelted consumables inside the nozzle, the nozzle needs to be disassembled and a thin rod or other cleaning equipment needs to be inserted into the 3D printing nozzle to clean the clogged area. This is rather cumbersome, and because the nozzle has a conical structure at the nozzle, it is difficult to effectively clean the consumables or impurities inside the nozzle, which in turn affects the normal working efficiency of the 3D printer. Summary of the invention

[0005] In order to solve the defects in the prior art, the present invention provides a 3D printer and a resetting device thereof.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] The present invention provides a 3D printer, comprising:

[0008] A gantry mechanism and a print head mechanism, wherein the print head mechanism is arranged on the gantry mechanism;

[0009] The print head mechanism includes an extrusion assembly, a nozzle assembly, and a heat dissipation assembly connected to the nozzle assembly;

[0010] The nozzle assembly includes a throat connected to the extrusion assembly, a heating block arranged at the lower end of the throat, and a nozzle connected to the heating block, an inclined hole is opened on the side of the nozzle, and a blocking piece is placed inside the inclined hole;

[0011] The gantry mechanism is also fixedly provided with a cleaning mechanism for cleaning the nozzle, and the cleaning mechanism comprises a stirring component arranged corresponding to the nozzle extrusion port and a cleaning component arranged corresponding to the inclined hole;

[0012] The stirring component extends into the interior of the nozzle to stir the raw material, and then cooperates with the cleaning component that extends into the interior of the inclined hole to absorb the raw material.

[0013] As a preferred technical solution of the present invention, the stirring assembly comprises:

[0014] A base, on which a first driving unit is fixedly arranged;

[0015] A support member, which is arranged to transmit transmission to the first driving unit via a bevel gear pair;

[0016] A fixing rod, fixedly arranged on the upper end of the supporting member;

[0017] The scraper is rotatably arranged inside the fixed rod via a rotating shaft. The fixed rod is provided with a placement groove at a position corresponding to the scraper. A torsion spring is arranged between the rotating shaft and the fixed rod.

[0018] As a preferred technical solution of the present invention, the support member includes a support seat connected to the bevel gear pair and a limit ring connected to the support seat through a plurality of groups of buffer springs.

[0019] As a preferred technical solution of the present invention, the fixing rod is fixedly arranged on the upper end of the limiting ring;

[0020] One end of the scraper away from the rotating shaft is fixedly connected to a rotating plate, the upper end of the support seat is provided with a push rod placed inside the fixed rod, and the upper end of the push rod is fixedly provided with a toggle block at a position corresponding to the rotating plate.

[0021] As a preferred technical solution of the present invention, the toggle block moves upward under the drive of the push rod and drives the rotating plate to rotate and then drives the scraper to rotate. After rotation, the scraper is arranged to fit the inclined surface of the inner wall of the nozzle.

[0022] As a preferred technical solution of the present invention, the cleaning component comprises:

[0023] A bracket, fixedly arranged on one side of the gantry mechanism;

[0024] A second driving unit, fixedly disposed on the bracket and connected to a rotating disk;

[0025] A first telescopic unit is fixedly disposed on the rotating disk and connected to a clamping unit, wherein the clamping unit is used to remove the blocking member from the inside of the inclined hole or insert the blocking member into the inside of the inclined hole;

[0026] The second telescopic unit is fixedly arranged on the other side of the rotating disk and is connected to a suction pipe, and the other end of the suction pipe is connected to a suction pump.

[0027] As a preferred technical solution of the present invention, the blocking member includes a blocking rod extending into the inclined hole and a fixing head arranged outside the inclined hole and fixedly connected to the blocking rod.

[0028] As a preferred technical solution of the present invention, a metal block is fixedly provided on a side of the fixed head close to the heating block, and a groove is formed in the heating block at a position corresponding to the metal block, and a magnet is placed inside the groove.

[0029] As a preferred technical solution of the present invention, the extrusion assembly and the gantry mechanism include:

[0030] Gantry unit;

[0031] The Z-axis drive unit is fixedly mounted on the gantry;

[0032] A Z-axis threaded rod, which is transmission-arranged with the Z-axis drive unit and rotationally arranged on the gantry unit;

[0033] A Z-axis slider, which is transmission-disposed with the Z-axis threaded rod and slides on the Z-axis slider;

[0034] The X-axis driving unit is fixedly arranged on the Z-axis slider;

[0035] An X-axis threaded rod is transmission-arranged with the X-axis drive unit and rotationally arranged on the Z-axis slider;

[0036] The X-axis sliding block is transmission-arranged with the X-axis threaded rod and slides on the X-axis sliding rod.

[0037] The present invention also provides a reset device, including a reset mechanism, the reset mechanism including:

[0038] Support frame;

[0039] The Y-axis driving unit is fixedly arranged on the supporting frame;

[0040] A Y-axis threaded rod, which is transmission-arranged with the Y-axis driving unit and rotationally arranged on the support frame unit;

[0041] A Y-axis slider, which is transmission-set with the Y-axis threaded rod and slides on the Y-axis slider;

[0042] The heating bed is fixedly arranged on the Y-axis slider, and a printing platform is arranged on the upper end of the heating bed.

[0043] The beneficial effects of the present invention are:

[0044] In the present invention, a cleaning mechanism is provided, and a stirring component in the cleaning mechanism can stir the raw material after extending into the interior of the nozzle. At the same time, a scraper in the stirring component is opened so that the scraper is close to the conical inner wall of the nozzle for scraping. Finally, the cleaning component can be used to absorb and process the stirred consumables or impurities, thereby improving the cleaning effect and cleaning efficiency of the consumables or impurities inside the nozzle. There is no need to disassemble the nozzle during use, which simplifies the cleaning process of the nozzle, thereby ensuring the normal working efficiency of the 3D printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0046] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0047] Figure 2 It is a schematic diagram of the local structure of the cleaning mechanism.

[0048] Figure 3 A schematic diagram of the structure of the cleaning component.

[0049] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0050] Figure 5 It is a structural diagram of the print head mechanism.

[0051] Figure 6 A schematic cross-sectional view of the nozzle.

[0052] Figure 7 A partial cross-sectional schematic diagram of the nozzle.

[0053] Figure 8 It is a schematic diagram of a partial plane section of the nozzle when the scraper is in contact with the inner wall of the nozzle.

[0054] Fig. 9 for Figure 8 A local enlarged schematic diagram of point B in the middle.

[0055] Fig.10 It is a schematic diagram of a partial plane cross-section of the nozzle when the scraper is not in contact with the inner wall of the nozzle.

[0056] Fig.11 for Fig.10 A partial enlarged schematic diagram of point C in the middle.

[0057] Fig.12 It is a schematic diagram of the structure of the sealing member and the heating block.

[0058] Fig.13 It is a structural schematic diagram of the gantry mechanism and the reset mechanism.

[0059] In the figure: 1. gantry mechanism; 11. gantry unit; 12. Z-axis drive unit; 13. Z-axis threaded rod; 14. Z-axis slider; 15. X-axis drive unit; 16. X-axis threaded rod; 17. X-axis slider; 2. Print head mechanism; 3. Extrusion assembly; 4. Nozzle assembly; 41. Throat; 42. Heating block; 421. Magnet; 43. Nozzle; 431. Oblique hole; 5. Heat dissipation assembly; 6. Blocking piece; 61. Blocking rod; 62. Fixed head; 63. Metal block; 7. Cleaning mechanism; 71. Agitating assembly; 711. Base; 712. First drive unit; 713. Support member; 7131. Support seat; 7132. Buffer spring Spring; 7133, limit ring; 7134, push rod; 7135, toggle block; 714, bevel gear pair; 715, fixing rod; 7151, placement groove; 716, scraper; 717, rotating shaft; 718, torsion spring; 719, rotating plate; 72, cleaning component; 721, bracket; 722, second drive unit; 723, rotating disk; 724, first telescopic unit; 725, clamping unit; 726, second telescopic unit; 727, suction tube; 728, suction pump; 8, reset mechanism; 81, support frame; 82, Y-axis drive unit; 83, Y-axis threaded rod; 84, Y-axis slider; 85, heating bed; 86, printing platform. DETAILED DESCRIPTION

[0060] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0061] Embodiment 1

[0062] like Figure 1-Figure 5As shown, a 3D printer comprises a gantry mechanism 1 and a print head mechanism 2, wherein the print head mechanism 2 is arranged on the gantry mechanism 1; the print head mechanism 2 comprises an extrusion assembly 3, a nozzle assembly 4 and a heat dissipation assembly 5 connected to the nozzle assembly 4; the nozzle assembly 4 comprises a throat 41 connected to the extrusion assembly 3, a heating block 42 arranged at the lower end of the throat 41 and a nozzle 43 connected to the heating block 42, an inclined hole 431 is provided on the side of the nozzle 43, and a blocking member 6 is placed inside the inclined hole 431; a cleaning mechanism 7 for cleaning the nozzle 43 is also fixedly arranged on the gantry mechanism 1, and the cleaning mechanism 7 comprises a stirring assembly 71 arranged corresponding to the extrusion port of the nozzle 43 and a cleaning assembly 72 arranged corresponding to the inclined hole 431; the stirring assembly 71 extends into the interior of the nozzle 43 to stir the raw material, and then cooperates with the cleaning assembly 72 extending into the interior of the inclined hole 431 to absorb the raw material.

[0063] Among them, by setting up the cleaning mechanism 7, the stirring component 71 in the cleaning mechanism 7 can stir the raw material after extending into the interior of the nozzle 43. At the same time, the scraper 716 in the stirring component 71 is opened so that the scraper 716 is close to the conical inner wall of the nozzle 43 for scraping. Finally, the cleaning component 72 can be used to absorb and process the stirred consumables or impurities, thereby improving the cleaning effect and cleaning efficiency of the consumables or impurities inside the nozzle 43. There is no need to disassemble the nozzle 43 when in use, which simplifies the cleaning process of the nozzle 43, thereby ensuring the normal working efficiency of the 3D printer.

[0064] In detail, the print head mechanism 2 is located on the gantry mechanism 1, allowing flexible movement in the three directions of X, Y, and Z to achieve various complex printing paths. The mechanism is equipped with multiple components, including an extrusion component 3, a nozzle component 4, and a heat dissipation component 5, which ensure the smoothness of the printing process and the proper heating of the material.

[0065] In the present invention, the provision of the throat 41 ensures continuous, unimpeded material flow from the extrusion assembly 3 to the nozzle, minimizing the possibility of blockage.

[0066] The design of the heating block 42 achieves rapid heating and cooling performance, ensuring optimal fluidity of the material during the printing process.

[0067] When the 3D printer is used normally, the blocking piece 6 is inserted into the inclined hole 431 for blocking. When the nozzle 43 needs to be cleaned, the blocking piece 6 can be pulled out, and the impurities inside the throat 41 can be quickly extracted by extending the suction tube 727 into the inclined hole 431, which not only ensures the smooth flow of the nozzle 43, but also improves the cleaning efficiency of the nozzle 43.

[0068] Further, if Figure 6-Figure 11 As shown, the stirring assembly 71 includes a base 711, a first driving unit 712, a support member 713, a bevel gear pair 714, a fixed rod 715 and a scraper 716. The first driving unit 712 is fixedly arranged on the base 711; the support member 713 is transmitted to the first driving unit 712 through the bevel gear pair 714; the fixed rod 715 is fixedly arranged at the upper end of the support member 713; the scraper 716 is rotatably arranged inside the fixed rod 715 through the rotating shaft 717, and the fixed rod 715 is provided with a placement groove 7151 at a position corresponding to the scraper 716, and a torsion spring 718 is arranged between the rotating shaft 717 and the fixed rod 715.

[0069] Among them, by setting up the stirring component 71, it can extend into the interior of the nozzle 43 and stir the raw materials. At the same time, the scraper 716 in the stirring component 71 is opened so that the scraper 716 is close to the conical inner wall of the nozzle 43 for scraping. In this way, the impurities and unmelted consumables inside the nozzle 43 can be stirred evenly, and the impurities and consumables can be pushed to one side of the cleaning component 72 to facilitate the subsequent processing of the cleaning component 72.

[0070] In detail, when a blockage occurs inside the nozzle 43, first, the print head mechanism 2 is driven by the gantry mechanism 1 to move to the stirring assembly 71 in the cleaning mechanism 7, and then the nozzle 43 is driven downward by the gantry mechanism 1 and the fixing rod 715 is extended into the interior of the nozzle 43, and then the first driving unit 712 works and drives the bevel gear pair 714 to work, and the bevel gear pair 714 drives the support member 713 and the fixing rod 715 at the upper end to rotate, thereby achieving stirring of the inside of the nozzle 43, which helps to accelerate the discharge of unmelted consumables inside the nozzle 43.

[0071] It should be noted that, in order to further improve the cleaning efficiency of the unmelted consumables inside the nozzle 43, a heating unit is arranged inside the support member 713. Specifically, the heating unit is arranged inside the support seat 7131. A plurality of heating wires are connected to the heating unit. The heating wire spirals are arranged inside the fixed rod 715. In this way, when the fixed rod 715 is extended into the interior of the nozzle 43, the heating unit can heat the fixed rod 715 synchronously. The fixed rod 715 is heated inside the nozzle 43. The heated fixed rod 715 can cooperate with the heating block 42 inside and outside to quickly melt the unmelted consumables inside the nozzle 43, so as to facilitate the rapid cleaning of the consumables.

[0072] In addition, in order to facilitate the fixing rod 715 to quickly extend into the interior of the nozzle 43, a conical portion is provided at the upper end of the fixing rod 715;

[0073] The bevel gear pair 714 is composed of two sets of bevel gears that cooperate with each other.

[0074] Further, if Figure 2-Figure 11 As shown, the support member 713 includes a support seat 7131 connected to the bevel gear pair 714 and a limiting ring 7133 connected to the support seat 7131 through a plurality of groups of buffer springs 7132. In order to further improve the stability of the support member 713, a sliding sleeve can also be set between the support seat 7131 and the limiting ring 7133.

[0075] The end of the scraper 716 away from the rotating shaft 717 is fixedly connected to a rotating plate 719, and the upper end of the support seat 7131 is provided with a push rod 7134 placed inside the fixed rod 715, and the upper end of the push rod 7134 is fixedly provided with a toggle block 7135 at a position corresponding to the rotating plate 719. It should be noted that the push rod 7134 is hingedly arranged with the support seat 7131 to ensure that the toggle block 7135 is always matched with the rotating plate 719;

[0076] The toggle block 7135 moves upward under the drive of the push rod 7134 and pushes the rotating plate 719 to rotate, thereby driving the scraper 716 to rotate. After the rotation, the scraper 716 is arranged to fit the inclined surface of the inner wall of the nozzle 43.

[0077] As the fixing rod 715 extends into the interior of the nozzle 43, the lower end surface of the nozzle 43 first contacts the limiting ring 7133. At this time, under the action of the buffer spring 7132, the fixing rod 715 and the internal scraper 716, the rotating plate 719 and the push rod 7134 generate relative displacement, and then the toggle block 7135 at the upper end of the push rod 7134 extends into the interior of the rotating plate 719 and drives the rotating plate 719 to rotate. After the rotating plate 719 rotates, it drives the scraper 716 to rotate until one end surface of the scraper 716 fits the inclined surface of the inner wall of the nozzle 43. When the nozzle 43 is separated from the fixing rod 715, under the action of the torsion spring 718, the scraper 716 will be reset and rotated to the interior of the fixing rod 715.

[0078] After the scraper 716 is attached to the inclined surface of the inner wall of the nozzle 43, as the first drive unit 712 works, the scraper 716 will scrape the inclined surface of the inner wall of the nozzle 43, which can further enhance the stirring effect of the consumables inside the nozzle 43, while stacking the consumables and impurities together as much as possible, so as to facilitate the subsequent rapid absorption of the cleaning component 72.

[0079] Therefore, during setting, the push rod 7134 and the toggle block 7135 need to pass through the limiting ring 7133 and be placed inside the hollow fixed rod 715 .

[0080] Further, if Figure 1-Figure 4As shown, the cleaning assembly 72 includes a bracket 721, a second driving unit 722, a rotating disk 723, a first telescopic unit 724, a clamping unit 725, a second telescopic unit 726, a suction pipe 727 and a suction pump 728. The bracket 721 is fixedly arranged on one side of the gantry mechanism 1; the second driving unit 722 is fixedly arranged on the bracket 721 and is connected to the rotating disk 723; the first telescopic unit 724 is fixedly arranged on the rotating disk 723 and is connected to the clamping unit 725, and the clamping unit 725 is used to remove the blocking piece 6 from the inside of the inclined hole 431 or insert it into the inside of the inclined hole 431; the second telescopic unit 726 is fixedly arranged on the other side of the rotating disk 723 and is connected to the suction pipe 727, and the other end of the suction pipe 727 is connected to the suction pump 728.

[0081] Among them, by providing the cleaning component 72 in cooperation with the stirring component 71, it is possible to achieve rapid absorption of consumables and impurities inside the nozzle 43.

[0082] In detail, after the stirring assembly 71 completes the stirring of the consumables and impurities inside the nozzle 43, first, the first telescopic unit 724 works and drives the clamping unit 725 to approach the blocking piece 6, and clamps the blocking piece 6 through the clamping unit 725, then the first telescopic unit 724 resets and extracts the blocking piece 6 from the inclined hole 431, the second driving unit 722 works and drives the rotating disk 723 to rotate, thereby realizing the station switching of the first telescopic unit 724 and the second telescopic unit 726, and making the second telescopic unit 726 and the suction pipe 727 close to the position of the inclined hole 431, then the second telescopic unit 726 works and drives the suction pipe 727 to extend into the inclined hole 431, and finally completes the absorption of the consumables and impurities inside the nozzle 43, when the scraper 716 scrapes on the inclined surface of the inner wall of the nozzle 43, the consumables and impurities inside the nozzle 43 can be gathered to the position of the inclined hole 431, thereby ensuring that the suction pipe 727 can absorb the consumables and impurities as cleanly as possible.

[0083] It should be noted that, in actual use, in order to ensure that the suction tube 727 can completely absorb the consumables and impurities, the inner diameter of the suction tube 727 is set to be at least 1.5 times the inner diameter of the extrusion port of the nozzle 43. This can ensure that impurities that cannot be smoothly discharged from the extrusion port of the nozzle 43 can be sucked out by the suction tube 727.

[0084] Further, if Figure 6-Figure 12 As shown, the blocking member 6 includes a blocking rod 61 extending into the inclined hole 431 and a fixing head 62 arranged outside the inclined hole 431 and fixedly connected to the blocking rod 61 .

[0085] The blocking rod 61 can be flexibly adjusted, and its structure ensures that it can penetrate into the inclined hole 431 so that the blocking part 6 can be quickly replaced when necessary, thereby improving the efficiency and safety of the process. The introduction of the fixed head 62 ensures the foothold and stability during the clamping action, facilitates the stable clamping of the clamping unit 725, and helps the clamping unit 725 to stably drive the blocking rod 61 to move.

[0086] Further, if Fig.12 As shown, a metal block 63 is fixedly provided on one side of the fixing head 62 close to the heating block 42 , and a groove is provided on the heating block 42 at a position corresponding to the metal block 63 , and a magnet 421 is placed inside the groove.

[0087] In order to ensure that the blocking rod 61 can be stably placed inside the inclined hole 431, a groove is opened in the heating block 42 at the position of the metal block 63 of the blocking rod 61, and a magnet 421 that can absorb the metal block 63 is arranged inside the groove. In this way, when the blocking rod 61 is extended into the inclined hole 431, the magnet 421 will firmly absorb the metal block 63, thereby ensuring the stability of the blocking piece 6 and preventing the blocking piece 6 from falling out of the inclined hole 431 during operation.

[0088] Embodiment 2

[0089] The components that are the same or corresponding to those in the first embodiment are marked with the same reference numerals as those in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0090] Further, if Figure 1 As shown, the gantry mechanism 1 comprises:

[0091] Gantry unit 11;

[0092] A Z-axis driving unit 12 is fixedly arranged on the gantry;

[0093] A Z-axis threaded rod 13, which is transmission-arranged with the Z-axis driving unit 12 and rotationally arranged on the gantry unit 11;

[0094] A Z-axis slider 14 is arranged in transmission with the Z-axis threaded rod 13 and slides on the Z-axis slider;

[0095] An X-axis driving unit 15 is fixedly arranged on the Z-axis slider 14;

[0096] An X-axis threaded rod 16 is arranged in transmission with the X-axis driving unit 15 and is rotatably arranged on the Z-axis slider 14;

[0097] The X-axis slide block 17 is transmission-disposed with the X-axis threaded rod 16 and slides on the X-axis slide block.

[0098] like Fig.13 As shown, the present invention further provides a reset device, including a reset mechanism 8, the reset mechanism 8 includes:

[0099] Support frame 81;

[0100] The Y-axis driving unit 82 is fixedly mounted on the support frame 81;

[0101] The Y-axis threaded rod 83 is arranged in transmission with the Y-axis driving unit 82 and is rotatably arranged on the support frame 81 unit;

[0102] A Y-axis slider 84 is arranged in transmission with the Y-axis threaded rod 83 and slides on the Y-axis slider;

[0103] The heating bed 85 is fixedly disposed on the Y-axis slider 84 , and a printing platform 86 is disposed on the upper end of the heating bed 85 .

[0104] Among them, the gantry mechanism 1, as the basic component of the printer, provides the necessary rigidity and stability for 3D printing. Its design can withstand various forces generated during the printing process. The design of driving elements such as the Z-axis and X-axis can achieve freedom of movement in all directions, ensuring that every step in the printing process is accurate and greatly improving the printing quality. Through the coordinated use of the Y-axis driving unit 82 and the Y-axis threaded rod 83, movement can be achieved easily and quickly during the printing process, ensuring that it can be smoothly reset after each printing is completed. This feature not only improves the convenience of operation, but also may extend the equipment maintenance cycle and improve the overall utilization efficiency.

[0105] The heated bed 85 is fixed on the Y-axis slider 84, ensuring that the temperature is kept consistent and stable during any printing process regardless of the working conditions, providing significant support for high-quality printing.

[0106] Working process:

[0107] When the nozzle 43 is clogged, first, the print head mechanism 2 is driven by the gantry mechanism 1 to move to the agitation assembly 71 in the cleaning mechanism 7, and then the nozzle 43 is driven by the gantry mechanism 1 to move downward and allow the fixing rod 715 to extend into the nozzle 43;

[0108] As the fixing rod 715 extends into the interior of the nozzle 43, the lower end surface of the nozzle 43 first contacts the limiting ring 7133. At this time, under the action of the buffer spring 7132, relative displacement occurs between the fixing rod 715 and the internal scraper 716, the rotating plate 719 and the push rod 7134. Then, the toggle block 7135 at the upper end of the push rod 7134 extends into the interior of the rotating plate 719 and drives the rotating plate 719 to rotate. After the rotating plate 719 rotates, it drives the scraper 716 to rotate until one end surface of the scraper 716 fits the inclined surface of the inner wall of the nozzle 43.

[0109] Then the first driving unit 712 works and drives the bevel gear pair 714 to work, and the bevel gear pair 714 drives the support member 713 and the upper fixed rod 715 and the internal scraper 716 to rotate, and the fixed rod 715 cooperates with the scraper 716 to achieve stirring of the inside of the nozzle 43;

[0110] After the stirring assembly 71 completes the stirring of the consumables and impurities inside the nozzle 43, the first telescopic unit 724 works and drives the clamping unit 725 to approach the blocking member 6, and the clamping unit 725 clamps the blocking member 6, and then the first telescopic unit 724 is reset and the blocking member 6 is extracted from the inclined hole 431;

[0111] The second driving unit 722 works and drives the rotating disk 723 to rotate, thereby realizing the station switching of the first telescopic unit 724 and the second telescopic unit 726, and making the second telescopic unit 726 and the suction tube 727 close to the inclined hole 431. Then the second telescopic unit 726 works and drives the suction tube 727 to extend into the interior of the inclined hole 431, and finally completes the absorption of consumables and impurities inside the nozzle 43.

[0112] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A 3D printer, characterized in that: include: A gantry mechanism (1) and a print head mechanism (2), wherein the print head mechanism (2) is arranged on the gantry mechanism (1); The print head mechanism (2) comprises an extrusion assembly (3), a nozzle assembly (4), and a heat dissipation assembly (5) connected to the nozzle assembly (4); The nozzle assembly (4) comprises a throat (41) connected to the extrusion assembly (3), a heating block (42) arranged at the lower end of the throat (41), and a nozzle (43) connected to the heating block (42); an inclined hole (431) is provided on the side of the nozzle (43), and a blocking member (6) is placed inside the inclined hole (431); A cleaning mechanism (7) for cleaning the nozzle (43) is also fixedly disposed on the gantry mechanism (1), the cleaning mechanism (7) comprising a stirring component (71) disposed corresponding to the extrusion port of the nozzle (43) and a cleaning component (72) disposed corresponding to the inclined hole (431); The stirring component (71) extends into the interior of the nozzle (43) to stir the raw material, and then cooperates with the cleaning component (72) that extends into the interior of the inclined hole (431) to absorb the raw material; The stirring assembly (71) comprises: A base (711), wherein a first driving unit (712) is fixedly arranged on the base (711); A support member (713) is arranged for transmission with the first drive unit (712) via a bevel gear pair (714); A fixing rod (715) fixedly disposed on the upper end of the supporting member (713); A scraper (716) is rotatably arranged inside the fixed rod (715) via a rotating shaft (717); the fixed rod (715) is provided with a placement groove (7151) at a position corresponding to the scraper (716); and a torsion spring (718) is provided between the rotating shaft (717) and the fixed rod (715); The cleaning component (72) comprises: A bracket (721) is fixedly arranged on one side of the gantry mechanism (1); A second driving unit (722) is fixedly disposed on the bracket (721) and is connected to a rotating disk (723); A first telescopic unit (724) is fixedly arranged on the rotating disk (723) and connected to a clamping unit (725), wherein the clamping unit (725) is used to remove the blocking member (6) from the inside of the inclined hole (431) or insert the blocking member (6) into the inside of the inclined hole (431); The second telescopic unit (726) is fixedly arranged on the other side of the rotating disk (723) and is connected to a suction pipe (727); the other end of the suction pipe (727) is connected to a suction pump (728).

2. The 3D printer according to claim 1, characterized in that: The support member (713) comprises a support seat (7131) connected to the bevel gear pair (714) and a limiting ring (7133) connected to the support seat (7131) via a plurality of groups of buffer springs (7132).

3. The 3D printer according to claim 2, characterized in that: The fixing rod (715) is fixedly arranged on the upper end of the limiting ring (7133); One end of the scraper (716) away from the rotating shaft (717) is fixedly connected to a rotating plate (719), and the upper end of the support seat (7131) is provided with a push rod (7134) placed inside the fixed rod (715), and the upper end of the push rod (7134) is fixedly provided with a toggle block (7135) at a position corresponding to the rotating plate (719).

4. The 3D printer according to claim 3, characterized in that: The toggle block (7135) moves upwards under the drive of the push rod (7134) and pushes the rotating plate (719) to rotate, thereby driving the scraper (716) to rotate. After the rotation, the scraper (716) is arranged to fit the inclined surface of the inner wall of the nozzle (43).

5. The 3D printer according to claim 4, characterized in that: The blocking member (6) comprises a blocking rod (61) extending into the interior of the inclined hole (431), and a fixing head (62) arranged outside the inclined hole (431) and fixedly connected to the blocking rod (61).

6. The 3D printer according to claim 5, characterized in that: A metal block (63) is fixedly arranged on a side of the fixed head (62) close to the heating block (42); the heating block (42) is provided with a groove at a position corresponding to the metal block (63); a magnet (421) is placed inside the groove.

7. The 3D printer according to claim 1, characterized in that: The gantry mechanism (1) comprises: Gantry unit (11); A Z-axis drive unit (12), fixedly mounted on the gantry; A Z-axis threaded rod (13) which is transmission-connected to the Z-axis drive unit (12) and rotationally connected to the gantry unit (11); A Z-axis slide block (14) which is arranged in transmission with the Z-axis threaded rod (13) and slides on the Z-axis slide block; An X-axis driving unit (15) is fixedly mounted on the Z-axis slider (14); An X-axis threaded rod (16) is transmission-connected to the X-axis drive unit (15) and rotationally connected to the Z-axis slider (14); The X-axis slide block (17) is transmission-arranged with the X-axis threaded rod (16) and slides on the X-axis slide block.

8. The 3D printer according to claim 1, characterized in that: It comprises a reset mechanism (8), wherein the reset mechanism (8) comprises: Support frame (81); A Y-axis driving unit (82) is fixedly mounted on the support frame (81); A Y-axis threaded rod (83) which is transmission-connected to the Y-axis drive unit (82) and rotationally connected to the support frame (81) unit; A Y-axis sliding block (84) is arranged in transmission with the Y-axis threaded rod (83) and slides on the Y-axis sliding block; The heating bed (85) is fixedly arranged on the Y-axis slider (84), and a printing platform (86) is arranged at the upper end of the heating bed (85).

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