Multi-material 3D printer

Abstract

The invention discloses a multi-material 3D printer, and relates to the technical field of printers, the multi-material 3D printer comprises a rack, an X-axis assembly, a Y-axis assembly, a Z-axis assembly, a printing platform, a material storage mechanism and a printing nozzle, and further comprises a cleaning mechanism for cleaning the surface of the printing platform, and the cleaning mechanism comprises a mounting assembly, a cleaning assembly and a wiping assembly. The multi-material 3D printer provided by the invention is provided with the cleaning mechanism, the mounting assembly in the cleaning mechanism realizes synchronous movement of the moving blocks on the two sides and the connecting frame, and a movable working platform is provided for the cleaning assembly and the wiping assembly; the cleaning assembly adjusts the position of a second vertical plate by pressing a clamping block, so that the distance between a scraper and the printing platform is changed, and different cleaning requirements are met; the wiping assembly is driven through a second hand wheel and a second screw, the distance between wiping sponge and the printing platform can be adjusted, effective wiping of the printing platform is achieved, and the wiping assembly, the wiping sponge and the printing platform are matched with one another to comprehensively complete cleaning work of the printing platform.

Description

Technical Field

[0001] This invention relates to the field of printer technology, and more specifically, to a multi-material 3D printer. Background Technology

[0002] In recent years, 3D printing technology has rapidly evolved from single-material molding to multi-material composite molding, with increasingly widespread applications in specific fields such as aerospace, medical, and electronics. These scenarios not only require equipment to be compatible with various printing materials with significant differences in hardness, melting point, and viscosity, but also impose stringent standards on printing accuracy and product yield. As the core reference surface for multi-material molding, the cleanliness of the printing platform directly determines the accuracy of interlayer positioning, the stability of material adhesion, and the lifespan of the nozzle. Different materials exhibit significant differences in the residual forms such as filaments, blocks, and sticky adhesions after cooling. Improper cleaning can easily lead to warping and detachment of printed parts, nozzle wear, or even equipment failure.

[0003] For existing multi-material 3D printers, there is still no effective solution for cleaning the printing platform to adapt to the residual characteristics of multiple materials. The core technical bottlenecks are mainly reflected in the following aspects: First, the cleaning solution lacks adaptability to different scenarios. Most mainstream cleaning mechanisms are designed based on the printing needs of a single material and do not consider the differentiated characteristics of the residues after cooling of multiple materials, such as filaments, blocks, and highly viscous adhesion, making it difficult to achieve targeted cleaning. Second, the working parameters of the cleaning execution components are fixed and lack adjustment mechanisms. They cannot change the relative distance or contact pressure with the printing platform according to the thickness and viscosity differences of the residues, resulting in incomplete scraping of thick residues, ineffective wiping of thin residues, and even damage to the high-precision surface of the platform or shortening the service life of the cleaning components due to excessive contact. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-material 3D printer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-material 3D printer, comprising a frame, an X-axis assembly, a Y-axis assembly, a Z-axis assembly, a printing platform, a material storage mechanism, and a printing nozzle, and further comprising a cleaning mechanism for cleaning the surface of the printing platform; The cleaning mechanism includes installation components, cleaning components, and wiping components; The mounting components include frame plates fixedly installed at both ends of the printing platform. A screw is rotatably installed between the two frame plates on the same side. A movable block is threaded onto both screws, and the movable block slides against the side of the printing platform. A connecting frame is provided between the movable blocks on both sides. The cleaning component includes a placement hole on the connecting frame, a snap-fit ​​hole on the placement hole, a second upright plate that is slidably installed in the placement hole, a number of mounting holes that are evenly spaced on the second upright plate, a second spring that is fixedly installed in the mounting holes, a snap-fit ​​block that is fixedly installed on the outer end of the second spring and the snap-fit ​​block that is compatible with the snap-fit ​​hole, and a scraper that is fixedly installed on the bottom of the second upright plate. The wiping assembly includes a longitudinal frame fixedly mounted on a connecting frame, a second screw rotatably mounted on the longitudinal frame, a second handwheel fixedly mounted on the top of the second screw, a first upright plate slidably mounted on the longitudinal frame and threadedly connected to the second screw, and a wiping sponge fixedly mounted on the bottom of the first upright plate.

[0006] Optionally, the frame includes a support platform and a bracket. The bracket has an inverted U-shaped structure and is fixedly installed on the top of the support platform. Two struts are fixedly installed between the support platform and the bracket, and the two struts are respectively located on both sides of the bracket.

[0007] Optionally, the X-axis assembly includes an X-axis guide rail and an X-axis moving block. The X-axis guide rail includes pads fixedly installed on both sides of the top of the support platform. An X-axis screw is rotatably installed between the two pads, and an X-axis guide rod is fixedly installed between the two pads. The X-axis moving block is threaded onto the X-axis screw, and the X-axis moving block is penetrated by the X-axis guide rod.

[0008] Optionally, the Y-axis assembly includes a Y-axis guide rail and a Y-axis moving block. The Y-axis guide rail includes a frame fixedly mounted on the top of the Y-axis moving block. A Y-axis screw is rotatably mounted on the frame, and a Y-axis guide rod is fixedly mounted on the frame. The Y-axis moving block is threadedly connected to the Y-axis screw, and the Y-axis moving block is penetrated by the Y-axis guide rod.

[0009] Optionally, a sliding groove is provided on both sides of the Y-direction moving block, and a longitudinal groove is provided on both sides of the top of the Y-direction moving block. The sliding groove on the same side is connected to the longitudinal groove. A first spring is fixedly installed at the inner end of the sliding groove. A snap-fit ​​component is slidably connected to the sliding groove, and the snap-fit ​​component is fixedly connected to the first spring. The snap-fit ​​component includes a crossbar that is slidably connected to the slide groove, a plug rod that is fixedly installed on the top of the crossbar, and the plug rod has an inverted L-shaped structure. A pull ring is fixedly installed on the outer end of the crossbar. The printing platform is positioned above the Y-axis moving block, and two connection slots adapted to the card connector are located at the bottom of the printing platform.

[0010] Optionally, the Z-axis assembly includes cylinders respectively disposed on both sides of the bracket, with a movable seat fixedly connected to the end of the piston rod of the cylinder, a horizontal plate fixedly installed between the two movable seats, and the print head disposed on the horizontal plate.

[0011] Optionally, the material storage mechanism includes a material storage box fixedly mounted on a bracket. Multiple material tanks are detachably installed on the upper side inside the material storage box, and a mixing chamber is opened on the lower side inside the material storage box. The bottom of the material tanks is connected to a discharge pipe, and a first control valve is installed on the discharge pipe. The bottom of the material storage box has a conical structure, and a material conveying hose is connected to the bottom of the material storage box. A second control valve is installed on the material conveying hose, and the material conveying hose is connected to the print head.

[0012] Optionally, a rotating rod is rotatably mounted on the storage box, and multiple stirring blades are fixedly mounted on the rotating rod. The stirring blades are arranged inside the mixing chamber. A connecting shaft is rotatably mounted on the side of the storage box, and a large gear is fixedly mounted on the connecting shaft. A small gear is fixedly mounted on the rotating rod, and the large gear and the small gear are meshed together. A turntable is fixedly mounted on the outer end of the connecting shaft, and a horizontal shaft is eccentrically mounted on the turntable. A connecting seat is fixedly mounted on the horizontal plate, and a long rod is arranged between the horizontal shaft and the connecting seat. One end of the long rod is rotatably connected to the horizontal shaft, and the other end of the long rod is rotatably connected to the connecting seat.

[0013] Optionally, the mounting assembly also includes a U-shaped frame fixedly mounted on the printing platform. The U-shaped frame is positioned between the No. 1 screws on both sides. A transmission rod and a No. 1 handwheel are rotatably mounted on the U-shaped frame, and the transmission rod and the No. 1 handwheel are vertically positioned. A No. 1 bevel gear set is provided between the transmission rod and the No. 1 handwheel, and a No. 2 bevel gear set is provided between both ends of the transmission rod and the two No. 1 screws.

[0014] Optionally, a connecting component is provided between the two movable blocks and the connecting frame. The connecting component includes a mating groove on the top of the two movable blocks, and limit holes are provided on both sides of the mating groove. A mating block that matches the mating groove is fixedly installed on both sides of the bottom of the connecting frame. An installation groove is provided on both sides of the mating block. A No. 3 spring is fixedly installed in the installation groove. A limit block that matches the limit hole is fixedly installed on the outer end of the No. 3 spring.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In the cleaning mechanism, the installation component, through a structure including a No. 1 handwheel, a No. 1 bevel gear set, a No. 2 bevel gear set, and a No. 1 screw, enables the synchronous movement of the moving blocks on both sides and the connecting frame, providing a movable working platform for the cleaning and wiping components. The cleaning component adjusts the position of the No. 2 upright plate by pressing the locking block, thereby changing the distance between the scraper and the printing platform to meet different cleaning needs. The wiping component, driven by the No. 2 handwheel and the No. 2 screw, can adjust the distance between the wiping sponge and the printing platform to achieve effective wiping of the printing platform. The three components work together to comprehensively complete the cleaning of the printing platform, ensuring that the printing platform is always in good working condition and improving print quality. 2. The structure, consisting of a rotating rod, stirring blades, connecting shaft, large gear, small gear, turntable, horizontal shaft, connecting seat, and long rod, utilizes the longitudinal movement of the horizontal plate under the action of the cylinder. The long rod pulls the turntable to rotate, and the large and small gears then drive the rotating rod and stirring blades to rotate, achieving automatic and rapid mixing of the printing material in the mixing chamber. This design eliminates the need for an additional power source to drive the stirring device, simplifying the equipment structure, reducing costs, and improving the mixing efficiency of the printing material. It ensures uniform mixing of the printing material, which is beneficial to improving the quality of 3D printed products. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the X-axis assembly and Y-axis assembly provided by the present invention; Figure 3 This is a schematic diagram of the installation of the connecting groove provided by the present invention; Figure 4 This is a schematic diagram of the structure of the snap-fit ​​component provided by the present invention; Figure 5 This is a schematic diagram of the Z-axis assembly provided by the present invention; Figure 6 The material storage mechanism provided by the present invention; Figure 7 This is a partial structural schematic diagram provided by the present invention; Figure 8 A schematic diagram of the installation component provided by the present invention; Figure 9 This is a schematic diagram of the structure of the cleaning component provided by the present invention; Figure 10 Schematic diagram of the connection component provided by the present invention Figure 1 ; Figure 11 Schematic diagram of the connection component provided by the present invention Figure 2 .

[0018] Explanation of reference numerals in the attached figures: 1. Frame; 101. Support platform; 102. Bracket; 103. Support rod; 2. X-axis assembly; 201. X-axis guide rail; 2011. Pad block; 2012. X-axis screw; 2013. X-axis guide rod; 202. X-axis moving block; 3. Y-axis assembly; 301. Y-axis guide rail; 3011. Frame; 3012. Y-axis screw; 3013. Y-axis guide rod; 302. Y-axis moving block; 4. Z-axis assembly; 401. Cylinder; 402. 403. Moving base; 5. Horizontal plate; 6. Printing platform; 7. Material storage mechanism; 8. Material storage box; 9. Material tank; 10. Mixing chamber; 11. Discharge pipe; 12. Control valve No. 1; 13. Material conveying hose; 14. Control valve No. 2; 15. Printing nozzle; 16. Mounting assembly; 17. Mounting plate; 18. Screw No. 1; 19. Moving block; 10. Connecting frame; 10. U-shaped frame; 11. Transmission rod; 12. Hand rod. Wheel; 808, Bevel Gear Set No. 1; 809, Bevel Gear Set No. 2; 9, Cleaning Components; 901, Placement Hole; 902, Snap-fit ​​Hole; 903, Vertical Plate No. 2; 904, Spring No. 2; 905, Snap-fit ​​Block; 906, Scraper; 10, Wiping Components; 1001, Longitudinal Frame; 1002, Screw No. 2; 1003, Handwheel No. 2; 1004, Vertical Plate No. 1; 1005, Wiping Sponge; 11, Slide; 12, Longitudinal Slot; 13, No. 1 14. Spring; 15. Snap-fit ​​component; 16. Crossbar; 17. Insert rod; 18. Pull ring; 19. Connecting groove; 20. Rotating rod; 21. Stirring blade; 22. Coupling shaft; 23. Large gear; 24. Small gear; 25. Turntable; 26. Horizontal shaft; 27. Connecting seat; 28. Long rod; 29. ​​Connecting assembly; 20. Docking groove; 21. Limiting hole; 22. Docking block; 23. No. 3 spring; 24. Limiting block. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] See attached document Figure 1 This embodiment of a multi-material 3D printer includes a frame 1, an X-axis assembly 2, a Y-axis assembly 3, a Z-axis assembly 4, a printing platform 5, a cleaning mechanism, a material storage mechanism 6, and a printing nozzle 7.

[0022] See attached document Figure 1 In one embodiment, the frame 1 includes a support platform 101 and a bracket 102. The bracket 102 has an inverted U-shaped structure and is fixedly installed on the top of the support platform 101. Two struts 103 are fixedly installed between the support platform 101 and the bracket 102, and the two struts 103 are respectively located on both sides of the bracket 102. By setting the struts 103, the structural stability of the bracket 102 during use is enhanced.

[0023] See attached document Figure 2 In one embodiment, the X-axis assembly 2 includes an X-axis guide rail 201 and an X-axis moving block 202. The X-axis guide rail 201 includes pads 2011 fixedly installed on both sides of the top of the support platform 101. An X-axis screw 2012 is rotatably installed between the two pads 2011, and an X-axis guide rod 2013 is fixedly installed between the two pads 2011. The X-axis moving block 202 is threadedly connected to the X-axis screw 2012, and the X-axis moving block 202 is penetrated by the X-axis guide rod 2013, thus limiting the movement of the X-axis moving block 202. When the X-axis screw 2012 rotates, the X-axis moving block 202 moves along the X-axis guide rod 2013.

[0024] See attached document Figure 2 In one embodiment, the Y-axis assembly 3 includes a Y-axis guide rail 301 and a Y-axis moving block 302. The Y-axis guide rail 301 includes a frame 3011 fixedly mounted on the top of the X-axis moving block 202. A Y-axis screw 3012 is rotatably mounted on the frame 3011, and a Y-axis guide rod 3013 is fixedly mounted on the frame 3011. The Y-axis moving block 302 is threadedly connected to the Y-axis screw 3012, and the Y-axis moving block 302 is penetrated by the Y-axis guide rod 3013, thus limiting the movement of the Y-axis moving block 302. When the Y-axis screw 3012 rotates, the Y-axis moving block 302 moves along the Y-axis guide rod 3013.

[0025] It should be noted that both the X-axis assembly 2 and the Y-axis assembly 3 also include drive motors (not shown in the figure). The drive motor of the X-axis assembly 2 is mounted on one side of the pad 2011, and the output shaft of the drive motor of the X-axis assembly 2 is connected to the X-axis screw 2012. The drive motor of the Y-axis assembly 3 is mounted on one side of the frame 3011, and the output shaft of the drive motor of the Y-axis assembly 3 is connected to the Y-axis screw 3012.

[0026] See attached document Figure 3 and Figure 4In one embodiment, the Y-axis moving block 302 has sliding grooves 11 on both sides, and longitudinal grooves 12 on both sides of the top of the Y-axis moving block 302. The sliding grooves 11 and longitudinal grooves 12 on the same side are connected. The length and width of the longitudinal grooves 12 are smaller than the length and width of the sliding grooves 11, respectively. The longitudinal grooves 12 and sliding grooves 11 on the same side are generally L-shaped. A spring 13 is fixedly installed at the inner end of the sliding groove 11. A snap-fit ​​component 14 is slidably connected to the sliding groove 11. The snap-fit ​​component 14 is fixedly connected to the first spring 13. The snap-fit ​​component 14 has an H-shaped structure. The snap-fit ​​component 14 includes a crossbar 1401 that is slidably connected to the slide groove 11. A plug-in rod 1402 is fixedly installed on the top of the crossbar 1401. The plug-in rod 1402 has an inverted L-shaped structure. The width of the plug-in rod 1402 is equal to the width of the longitudinal groove 12. The height of the plug-in rod 1402 is greater than the height of the longitudinal groove 12. A pull ring 1403 is fixedly installed on the outer end of the crossbar 1401. The printing platform 5 is positioned above the Y-axis moving block 302. Two connecting slots 15 adapted to the card connector 14 are provided at the bottom of the printing platform 5. The connecting slots 15 are L-shaped, and the top of the connecting slots 15 is larger than the bottom. The bottom of the connecting slots 15 is adapted to the top of the plug rod 1402. When assembling the printing platform 5 and the Y-axis moving block 302, first pull the horizontal bars 1401 on both sides outwards using the pull ring 1403, so that the horizontal bars 1401 on both sides drive the plug rods 1402 to move in opposite directions until the plug rods 1402 on both sides correspond vertically to the bottom of the connecting groove 15 at the bottom of the printing platform 5. At this time, insert the plug rods 1402 along the connecting groove 15 so that the top of the plug rods 1402 fits against the top of the connecting groove 15. Then release the pull ring 1403. At this time, under the elastic action of the first spring 13, the horizontal bars 1401 on both sides drive the plug rods 1402 on both sides to move in opposite directions, thereby realizing the assembly between the printing platform 5 and the Y-axis moving block 302.

[0027] See attached document Figures 8-11 The cleaning mechanism includes an installation component 8, a cleaning component 9, and a wiping component 10; Mounting assembly 8 includes frame plates 801 fixedly mounted on both ends of the printing platform 5. A first screw 802 is rotatably mounted between the two frame plates 801 on the same side. The first screw 802 is horizontally positioned, and each of the two first screws 802 is threadedly connected to a movable block 803. The movable blocks 803 slide against the side of the printing platform 5, thus limiting their movement. A connecting frame 804 is provided between the two movable blocks 803. A U-shaped frame 805 is also fixedly mounted on the printing platform 5, positioned between the first screws 802 on both sides. A transmission rod 806 and a first handwheel 807 are rotatably mounted on the frame 805, and the transmission rod 806 and the first handwheel 807 are arranged vertically. A first bevel gear set 808 is arranged between the transmission rod 806 and the first handwheel 807. A second bevel gear set 809 is arranged between each end of the transmission rod 806 and the two first screws 802. In use, when the operator rotates the first handwheel 807, the transmission rod 806 rotates under the action of the first bevel gear set 808. Under the action of the second bevel gear sets 809 on both sides, the first screws 802 on both sides rotate synchronously. The cleaning component 9 includes a placement hole 901 on the connecting frame 804. The placement hole 901 is rectangular and has a snap-fit ​​hole 902. The placement hole 901 and the snap-fit ​​hole 902 are vertically aligned. A second upright plate 903 is slidably installed inside the placement hole 901. Multiple mounting holes are evenly spaced on the second upright plate 903. A second spring 904 is fixedly installed in each mounting hole. A snap-fit ​​block 905 is fixedly installed at the outer end of the second spring 904 and is adapted to the snap-fit ​​hole 902. A scraper 906 is fixedly installed at the bottom of the second upright plate 903, and the bottom of the scraper 906 is parallel to the printing platform 5. In use, the operator first presses the snap-fit ​​block 905, causing it to retract into the mounting hole. At this time, the second spring 904 is in a compressed state. Then, the second vertical plate 903 is pulled, causing the snap-fit ​​block 905 on the second vertical plate 903 to engage with the snap-fit ​​holes 902 at different positions, thereby adjusting the distance between the scraper 906 and the printing platform 5. The wiping assembly 10 includes a longitudinal frame 1001 fixedly mounted on a connecting bracket 804. A second screw 1002 is rotatably mounted on the longitudinal frame 1001. The second screw 1002 is arranged longitudinally, and a second handwheel 1003 is fixedly mounted on the top of the second screw 1002. In use, rotating the second handwheel 1003 drives the second screw 1002 to rotate. A first upright plate 1004 is slidably mounted on the longitudinal frame 1001, meaning the width of the first upright plate 1004 is equal to the width of the longitudinal frame. The internal width of the frame 1001 is equal, and the first upright plate 1004 is threadedly connected to the second screw 1002. A wiping sponge 1005 is fixedly installed at the bottom of the first upright plate 1004. During use, the operator rotates the second screw 1002 by the second handwheel 1003. During the rotation of the second screw 1002, the first upright plate 1004 drives the wiping sponge 1005 to move longitudinally along the longitudinal frame 1001, thereby adjusting the distance between the wiping sponge 1005 and the printing platform 5.

[0028] See attached document Figure 10 and Figure 11 In one embodiment, a connecting component 25 is provided between the two movable blocks 803 and the connecting frame 804. The connecting component 25 includes a docking groove 2501 formed on the top of the two movable blocks 803. Limiting holes 2502 are formed on both sides of the docking groove 2501. The docking groove 2501 and the limiting holes 2502 are vertically arranged. The two sides of the bottom of the connecting frame 804 are fixedly installed with docking blocks 2503 that are adapted to the docking groove 2501. The two sides of the docking blocks 2503 are provided with mounting grooves. A No. 3 spring 2504 is fixedly installed in the mounting groove. A limiting block 2505 adapted to the limiting hole 2502 is fixedly installed on the outer end of the No. 3 spring 2504. When assembling the movable block 803 and the connecting frame 804, the limiting block 2505 is pressed first. At this time, the No. 3 spring 2504 connected to the movable block 803 is in a compressed state. Then, the mating blocks 2503 on both sides of the bottom of the connecting frame 804 are aligned with the mating slots 2501 opened on the top of the movable blocks 803 on both sides and inserted. When the limiting block 2505 on the connecting frame 804 is just engaged with the limiting hole 2502 on the movable block 803, the assembly between the movable block 803 and the connecting frame 804 is completed.

[0029] See attached document Figure 5 In one embodiment, the Z-axis assembly 4 includes cylinders 401 respectively disposed on both sides of the bracket 102. The cylinders 401 on both sides are of the same specification. The piston rod of the cylinder 401 is fixedly connected to a movable seat 402. A horizontal plate 403 is fixedly installed between the two movable seats 402. The print head 7 is disposed on the horizontal plate 403. That is, when the cylinders 401 on both sides are in use, the piston rod of the cylinder 401 extends and retracts, thereby driving the horizontal plate 403 and the print head 7 to move longitudinally.

[0030] See attached document Figure 6 In one embodiment, the material storage mechanism 6 includes a material storage box 601 fixedly mounted on a bracket 102. Multiple material tanks 602 are detachably installed on the upper side inside the material storage box 601. A mixing chamber 603 is opened on the lower side inside the material storage box 601. A discharge pipe 604 is connected to the bottom of each material tank 602, and a first control valve 605 is installed on the discharge pipe 604. The bottom of the material storage box 601 has a conical structure, and a conveying hose 606 is connected to the bottom of the material storage box 601. A second control valve 607 is installed on the conveying hose 606, which is connected to the print head 7. In actual use, according to the selected printing material, the first control valve 605 at the bottom of the corresponding material tank 602 is opened, and the printing material in the material tank 602 flows into the mixing chamber 603. After mixing is complete, the second control valve 607 on the conveying hose 606 is opened, and the mixed printing material enters the print head 7 along the conveying hose 606.

[0031] See attached document Figure 6 and Figure 7 In one embodiment, a rotating rod 16 is rotatably mounted on the storage box 601. The rotating rod 16 is horizontally positioned, and multiple stirring blades 17 are fixedly mounted on the rotating rod 16. The stirring blades 17 are disposed in the mixing chamber 603. A connecting shaft 18 is rotatably mounted on the side of the storage box 601. A large gear 19 is fixedly mounted on the connecting shaft 18, and a small gear 20 is fixedly mounted on the rotating rod 16. The large gear 19 and the small gear 20 are meshed together. A turntable 21 is fixedly mounted on the outer end of the connecting shaft 18. A horizontal shaft 22 is eccentrically mounted on the turntable 21. A connecting seat 23 is fixedly mounted on the horizontal plate 403. A long rod 24 is disposed between the horizontal shaft 22 and the connecting seat 23. One end of the long rod 24 is rotatably connected to the horizontal shaft 22, and the other end of the long rod 24 is rotatably connected to the connecting seat 23. When the horizontal plate 403 moves longitudinally under the action of the cylinder 401, the connecting seat 23 moves longitudinally synchronously with the horizontal plate 403. At this time, the long rod 24 pulls the turntable 21 to rotate through the horizontal shaft 22, thereby realizing the synchronous rotation of the connecting shaft 18 and the large gear 19, and then realizing the synchronous rotation of the small gear 20, the rotating rod 16 and the stirring blade 17. During the rotation, the stirring blade 17 stirs the printing material in the mixing chamber 603, so that it is fully mixed.

[0032] It should be noted that using the large gear 19 as the driving component to drive the small gear 20 to rotate increases the rotational speed of the small gear 20, which in turn increases the rotational speed of the rotating rod 16 and the stirring blade 17, thus facilitating the rapid mixing of the printing material in the mixing chamber 603.

[0033] When the multi-material 3D printer is working, the X-axis assembly 2 and the Y-axis assembly 3 drive the X-axis screw 2012 and the Y-axis screw 3012 to rotate through their respective drive motors, causing the X-axis moving block 202 and the Y-axis moving block 302 to move along the X-axis guide rod 2013 and the Y-axis guide rod 3013 respectively, thus positioning the printing platform 5 in the horizontal plane; the piston rod of the cylinder 401 of the Z-axis assembly 4 extends and retracts, driving the horizontal plate 403 and the printing nozzle 7 to move longitudinally, thus positioning the printing nozzle 7 in the vertical direction; the material tank 602 of the material storage mechanism 6 opens the first control valve 605 as needed, and the raw material flows into the mixing chamber 603. After being mixed by the stirring blade 17, the second control valve 607 is opened, and the raw material enters the printing nozzle 7 through the material conveying hose 606; printing... Platform 5 is assembled with Y-axis moving block 302 via snap-fit ​​14; the cleaning mechanism drives screw 802 to rotate via handwheel 807 of mounting component 8, causing moving block 803 and connecting frame 804 to move; cleaning component 9 can adjust the distance between scraper 906 and printing platform 5; wiping component 10 drives screw 1002 to rotate via handwheel 1003, adjusting the distance between wiping sponge 1005 and printing platform 5 to clean printing platform 5; simultaneously, when horizontal plate 403 moves longitudinally under the action of cylinder 401, connecting seat 23 drives long rod 24 to pull turntable 21 to rotate, which is transmitted through shaft 18, large gear 19, and small gear 20, causing rotating rod 16 and stirring blade 17 to rotate, stirring and mixing printing material in mixing chamber 603. After scraper 906 removes hard residue, wiping sponge 1005 treats sticky residue.

[0034] In this application, the installation component 8, through a structure including a first handwheel 807, a first bevel gear set 808, a second bevel gear set 809, and a first screw 802, enables the synchronous movement of the two side moving blocks 803 and the connecting frame 804, providing a movable working platform for the cleaning component 9 and the wiping component 10. The cleaning component 9 adjusts the position of the second upright plate 903 by pressing the latching block 905, thereby changing the distance between the scraper 906 and the printing platform 5 to meet different cleaning needs. The wiping component 10, driven by the second handwheel 1003 and the second screw 1002, can adjust the distance between the wiping sponge 1005 and the printing platform 5 to achieve effective wiping of the printing platform 5. The three components work together to comprehensively complete the cleaning of the printing platform 5, ensuring that the printing platform 5 is always in good working condition and improving printing quality. The structure, consisting of a rotating rod 16, stirring blades 17, connecting shaft 18, large gear 19, small gear 20, turntable 21, horizontal shaft 22, connecting seat 23, and long rod 24, utilizes the longitudinal movement of the horizontal plate 403 under the action of the cylinder 401. The long rod 24 pulls the turntable 21 to rotate, and then the large gear 19 and small gear 20 drive the rotating rod 16 and stirring blades 17 to rotate. This achieves automatic and rapid stirring and mixing of the printing material in the mixing chamber 603. This design eliminates the need for an additional power source to drive the stirring device, simplifies the equipment structure, reduces costs, and improves the mixing efficiency of the printing material, ensuring uniform mixing and thus improving the quality of 3D printed products.

[0035] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-material 3D printer, comprising a frame (1), an X-axis assembly (2), a Y-axis assembly (3), a Z-axis assembly (4), a printing platform (5), a material storage mechanism (6), and a printing nozzle (7), characterized in that: It also includes a cleaning mechanism for cleaning the surface of the printing platform (5); The cleaning mechanism includes an installation component (8), a cleaning component (9), and a wiping component (10); The mounting assembly (8) includes a frame plate (801) fixedly installed at both ends of the printing platform (5). A screw (802) is rotatably installed between the two frame plates (801) on the same side. A moving block (803) is threadedly connected to each of the two screws (802). The moving block (803) slides against the side of the printing platform (5). A connecting frame (804) is provided between the moving blocks (803) on both sides. The cleaning component (9) includes a placement hole (901) on the connecting frame (804), a snap-fit ​​hole (902) on the placement hole (901), a second upright plate (903) slidably installed in the placement hole (901), a plurality of mounting holes equally spaced on the second upright plate (903), a second spring (904) fixedly installed in the mounting holes, a snap-fit ​​block (905) fixedly installed on the outer end of the second spring (904), and the snap-fit ​​block (905) is adapted to the snap-fit ​​hole (902), and a scraper (906) is fixedly installed on the bottom of the second upright plate (903). The wiping assembly (10) includes a longitudinal frame (1001) fixedly mounted on a connecting frame (804), a second screw (1002) rotatably mounted on the longitudinal frame (1001), a second handwheel (1003) fixedly mounted on the top of the second screw (1002), a first upright plate (1004) slidably mounted on the longitudinal frame (1001), and the first upright plate (1004) is threadedly connected to the second screw (1002), and a wiping sponge (1005) is fixedly mounted on the bottom of the first upright plate (1004).

2. The multi-material 3D printer according to claim 1, characterized in that: The frame (1) includes a support platform (101) and a bracket (102). The bracket (102) has an inverted U-shaped structure and is fixedly installed on the top of the support platform (101). Two support rods (103) are fixedly installed between the support platform (101) and the bracket (102), and the two support rods (103) are respectively located on both sides of the bracket (102).

3. A multi-material 3D printer according to claim 2, characterized in that: The X-axis assembly (2) includes an X-axis guide rail (201) and an X-axis moving block (202). The X-axis guide rail (201) includes pads (2011) fixedly installed on both sides of the top of the support platform (101). An X-axis screw (2012) is rotatably installed between the two pads (2011), and an X-axis guide rod (2013) is fixedly installed between the two pads (2011). The X-axis moving block (202) is threadedly connected to the X-axis screw (2012), and the X-axis moving block (202) is penetrated by the X-axis guide rod (2013).

4. A multi-material 3D printer according to claim 3, characterized in that: The Y-axis assembly (3) includes a Y-axis guide rail (301) and a Y-axis moving block (302). The Y-axis guide rail (301) includes a frame (3011) fixedly installed on the top of the X-axis moving block (202). A Y-axis screw (3012) is rotatably installed on the frame (3011), and a Y-axis guide rod (3013) is fixedly installed on the frame (3011). The Y-axis moving block (302) is threadedly connected to the Y-axis screw (3012), and the Y-axis moving block (302) is penetrated by the Y-axis guide rod (3013).

5. A multi-material 3D printer according to claim 4, characterized in that: The Y-direction moving block (302) has sliding grooves (11) on both sides, and longitudinal grooves (12) are provided on both sides of the top of the Y-direction moving block (302). The sliding grooves (11) on the same side are connected to the longitudinal grooves (12). A first spring (13) is fixedly installed at the inner end of the sliding groove (11). A snap-fit ​​piece (14) is slidably connected on the sliding groove (11), and the snap-fit ​​piece (14) is fixedly connected to the first spring (13). Among them, the snap-fit ​​component (14) includes a crossbar (1401) that is slidably connected to the slide groove (11), a plug rod (1402) is fixedly installed on the top of the crossbar (1401), and the plug rod (1402) is an inverted L-shaped structure. A pull ring (1403) is fixedly installed on the outer end of the crossbar (1401). The printing platform (5) is positioned above the Y-axis moving block (302), and two connecting slots (15) adapted to the card connector (14) are provided at the bottom of the printing platform (5).

6. A multi-material 3D printer according to claim 2, characterized in that: The Z-axis assembly (4) includes cylinders (401) respectively disposed on both sides of the bracket (102). The piston rod end of the cylinder (401) is fixedly connected to a movable seat (402). A horizontal plate (403) is fixedly installed between the two movable seats (402). The printing nozzle (7) is disposed on the horizontal plate (403).

7. A multi-material 3D printer according to claim 6, characterized in that: The material storage mechanism (6) includes a material storage box (601) fixedly installed on a bracket (102). Multiple material tanks (602) are detachably installed on the upper side inside the material storage box (601). A mixing chamber (603) is opened on the lower side inside the material storage box (601). The bottom of the material tank (602) is connected to a discharge pipe (604). A first control valve (605) is provided on the discharge pipe (604). The bottom of the material storage box (601) is a conical structure. A conveying hose (606) is connected to the bottom of the material storage box (601). A second control valve (607) is provided on the conveying hose (606). The conveying hose (606) is connected to the printing nozzle (7).

8. A multi-material 3D printer according to claim 7, characterized in that: A rotating rod (16) is rotatably mounted on the storage box (601). Multiple stirring blades (17) are fixedly mounted on the rotating rod (16). The stirring blades (17) are set in the mixing chamber (603). A connecting shaft (18) is rotatably mounted on the side of the storage box (601). A large gear (19) is fixedly mounted on the connecting shaft (18). A small gear (20) is fixedly mounted on the rotating rod (16). The large gear (19) and the small gear (20) are meshed together. A turntable (21) is fixedly mounted on the outer end of the connecting shaft (18). A horizontal shaft (22) is eccentrically mounted on the turntable (21). A connecting seat (23) is fixedly mounted on the horizontal plate (403). A long rod (24) is set between the horizontal shaft (22) and the connecting seat (23). One end of the long rod (24) is rotatably connected to the horizontal shaft (22), and the other end of the long rod (24) is rotatably connected to the connecting seat (23).

9. A multi-material 3D printer according to claim 8, characterized in that: The mounting assembly (8) also includes a U-shaped frame (805) fixedly mounted on the printing platform (5). The U-shaped frame (805) is located between the first screws (802) on both sides. A transmission rod (806) and a first handwheel (807) are rotatably mounted on the U-shaped frame (805). The transmission rod (806) and the first handwheel (807) are vertically arranged. A first bevel gear set (808) is arranged between the transmission rod (806) and the first handwheel (807). A second bevel gear set (809) is arranged between both ends of the transmission rod (806) and the two first screws (802).

10. A multi-material 3D printer according to claim 9, characterized in that: A connecting component (25) is provided between the two movable blocks (803) and the connecting frame (804). The connecting component (25) includes a docking groove (2501) opened on the top of the two movable blocks (803). Limiting holes (2502) are opened on both sides of the docking groove (2501). A docking block (2503) adapted to the docking groove (2501) is fixedly installed on both sides of the bottom of the connecting frame (804). A mounting groove is opened on both sides of the docking block (2503). A No. 3 spring (2504) is fixedly installed in the mounting groove. A limiting block (2505) adapted to the limiting hole (2502) is fixedly installed on the outer end of the No. 3 spring (2504).

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