Electromagnetic adsorption type switching mechanism
The electromagnetic adsorption switching mechanism solves the mechanical connection gap problem in the printhead switching process of FDM multicolor 3D printers, achieving stable printhead switching and improved print quality.
Patent Information
- Application Number
- CN202610053660.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-15
- Publication Date
- 2026-04-10
AI Technical Summary
Existing FDM multicolor 3D printers suffer from printhead wobbling and positional deviation due to large gaps in the mechanical connections during printhead switching, which affects print quality.
An electromagnetic adsorption switching mechanism is adopted, which uses the adsorption connection between an electromagnet and an iron plate to achieve rapid and stable switching of nozzles, avoiding the gap problem of mechanical connection.
It improves the stability of the printhead switching process, reduces positional deviation, and significantly improves print quality.
Smart Images
Figure CN121821786A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of 3D printing, and particularly relates to an electromagnetic adsorption type switching mechanism. BACKGROUND
[0002] The FDM multi-color 3D printer is a 3D printing device based on the fused deposition modeling technology, and the core is to heat thermoplastic consumables to a molten state, and then extrude and layer by layer stack by a nozzle according to a preset path, and the FDM multi-color 3D printer can print using multiple colors of consumables; some FDM multi-color 3D printers are provided with multiple 3D printing nozzles, and the core purpose is to realize multi-color printing, different nozzles load different colors of thermoplastic consumables, and the nozzles are switched by a control system during printing or cooperatively extruded, so that the consumables can be directly formed into a color model without interrupting printing and replacing the consumables.
[0003] However, in use of the existing FDM multi-color 3D printer, the switching mode of the multiple nozzles mainly relies on mechanical structure for connection, although the moving assembly can drive the nozzles to move on the printing platform, the mechanical connection has a problem of large connection gap, and the nozzles are prone to shaking during switching, thereby easily leading to position deviation of the nozzles during use, and finally affecting the printing quality.
[0004] Therefore, it is necessary to provide an electromagnetic adsorption type switching mechanism to solve the above problems. SUMMARY
[0005] In order to solve the technical problems that the existing FDM multi-color 3D printer relies on mechanical structure for switching of multiple nozzles, has a large connection gap, is prone to shaking during switching, and thus is prone to position deviation of the nozzles and affects the printing quality, the application provides an electromagnetic adsorption type switching mechanism.
[0006] The application is implemented as follows: an electromagnetic adsorption type switching mechanism, comprising: a moving assembly arranged on a body of an FDM multi-color 3D printer, a moving block fixedly installed on the moving assembly; an installation block fixedly installed on the moving block, a clamping groove being formed in the installation block; a positioning rod fixedly installed on the body of the FDM multi-color 3D printer, an installation plate being slidably installed on the positioning rod, a 3D printing nozzle for printing an object being fixedly installed on the installation plate; and an electromagnetic adsorption mechanism assembled on the installation plate and used for quickly switching the 3D printing nozzle.
[0007] Preferably, the electromagnetic adsorption mechanism comprises: a clamping block fixedly installed on the installation plate through a U-shaped plate, the clamping block being matched with the clamping groove, and an iron plate being fixedly installed on the clamping block; and an electromagnet fixedly installed on an inner wall of the clamping groove and used for adsorbing the iron plate.
[0008] Preferably, the electromagnetic adsorption switching mechanism further includes a disassembly mechanism mounted on the mounting plate for fixing the mounting plate.
[0009] Preferably, the disassembly mechanism includes: a mounting groove formed on the mounting plate, the inner wall of the mounting groove having an opening; a fixing plate fixedly mounted on the mounting plate by bolts, a sliding rod fixedly mounted on the fixing plate, the sliding rod being located inside the opening; a mounting sleeve slidably mounted on the sliding rod by a slider, the mounting sleeve containing a spring, the mounting sleeve being located inside the mounting groove; a connecting plate slidably mounted on the sliding rod, the connecting plate contacting the spring; and a triangular block fixedly mounted on the connecting plate by a connecting post, the triangular block being adapted to a triangular groove on the positioning rod.
[0010] Preferably, the triangular block is provided with a ball bearing for rolling within the triangular groove, the ball bearing being in contact with the inner wall of the triangular groove.
[0011] Preferably, a screw for raising and lowering the mounting sleeve is threadedly installed on the fixing plate. One end of the screw is rotatably connected to the mounting sleeve through a bearing, and the other end of the screw is fixedly installed with a knob for rotating the screw. An anti-slip plate is fixedly installed on the knob.
[0012] Preferably, a baffle is fixedly installed on the slide rod. The baffle is circular and is used to block the connecting plate.
[0013] Preferably, the electromagnetic adsorption switching mechanism further includes a blower mechanism mounted on the movable block for cooling the printed object.
[0014] Preferably, the blower mechanism includes: a fixing groove formed on the movable block, the inner wall of the fixing groove having a through hole; a blower cover fixedly installed on the movable block, the blower cover communicating with the through hole; and a motor fixedly installed in the fixing groove by a support rod, the output shaft of the motor having fan blades fixedly installed on it.
[0015] Preferably, a threaded tube is fixedly installed on one side of the movable block, the threaded tube is connected to the fixed groove, a cover is threadedly installed on the threaded tube, the cover has an installation port, and a filter screen for blocking impurities is fixedly installed on the inner wall of the installation port.
[0016] Compared with related technologies, the electromagnetic adsorption switching mechanism provided by the present invention has the following advantages: This solution utilizes a combination of a moving component, a moving block, a mounting block, a slot, and an electromagnetic adsorption mechanism. It enables rapid connection between the mounting block and the 3D printing nozzle via electromagnetic adsorption. After connection, the moving component moves the moving block away from the 3D printing nozzle. At this point, a strong suction force pulls the mounting plate along the positioning rod until it completely detaches. Once detached, the moving component, according to the FDM multi-color 3D printer's programmed settings, moves the 3D printing nozzle to complete the printing of the desired object. The reverse process also works. It can quickly disconnect the mounting block from the 3D printing nozzle and place the mounting plate on the positioning rod. Thus, multiple sets of components such as the 3D printing nozzle can be used, allowing the mounting block to achieve electromagnetic adsorption connection with the corresponding 3D printing nozzle using the moving component. The entire switching process is convenient to operate and stable in use. Because the electromagnet in the electromagnetic adsorption mechanism will fit tightly with the iron plate after being energized, compared with the traditional mechanical connection method, it can effectively avoid the problem of large gaps, making the 3D printing nozzle less prone to shaking during switching, thereby reducing the positional deviation of the 3D printing nozzle during use and significantly improving the printing quality. Attached Figure Description
[0017] Figure 1 This is a cross-sectional structural schematic diagram of an electromagnetic adsorption switching mechanism provided by the present invention; Figure 2 for Figure 1 An enlarged structural diagram of part A shown in the figure; Figure 3 for Figure 2 An enlarged structural diagram of part B shown in the figure; Figure 4 for Figure 3 An enlarged structural diagram of section C shown in the figure; Figure 5 for Figure 3 An enlarged structural diagram of part D shown in the figure; Figure 6 for Figure 1 An enlarged structural diagram of part E shown in the figure; Figure 7 This is a schematic diagram of the assembly structure of the U-shaped plate, the card block, and the iron plate in this invention; Figure 8 This is a three-dimensional structural diagram of the positioning rod in this invention; Figure 9 This is a schematic diagram of the assembly structure of the connecting plate and the connecting column in this invention; Figure 10 This is a schematic diagram of the assembly structure of the slide bar and the baffle in this invention.
[0018] Reference numerals: 1. FDM multicolor 3D printer body; 2. Moving component; 3. Moving block; 4. Mounting block; 5. Slot; 6. Electromagnet; 7. Positioning rod; 8. Mounting plate; 9. 3D printing nozzle; 10. U-shaped plate; 11. Locking block; 12. Iron plate; 13. Mounting groove; 14. Opening; 15. Fixing plate; 16. Sliding rod; 17. Sliding block; 18. Mounting sleeve; 19. Spring; 20. Connecting plate; 21. Connecting column; 22. Triangular block; 23. Triangular groove; 24. Screw; 25. Bearing; 26. Bolt; 27. Baffle; 28. Ball bearing; 29. Fixing groove; 30. Through hole; 31. Blower cover; 32. Support rod; 33. Motor; 34. Fan blade; 35. Threaded tube; 36. Cover; 37. Mounting port; 38. Filter screen; 39. Knob; 40. Anti-slip plate. Detailed Implementation
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification and the foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification or the foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0021] This invention provides an electromagnetic adsorption switching mechanism, such as... Figures 1-10 As shown, the electromagnetic adsorption switching mechanism includes: a movable component 2 disposed on the body 1 of the FDM multicolor 3D printer, on which a movable block 3 is fixedly mounted; a mounting block 4 fixedly mounted on the movable block 3, on which a slot 5 is provided; a positioning rod 7 fixedly mounted on the body 1 of the FDM multicolor 3D printer, on which a mounting plate 8 is slidably mounted, on which a 3D printing nozzle 9 for printing objects is fixedly mounted; and an electromagnetic adsorption mechanism for quickly switching the 3D printing nozzle 9 assembled on the mounting plate 8.
[0022] In this solution, the moving component 2 is a mature existing technology, and its principle will not be described here. When the electromagnetic adsorption switching mechanism is in use, and the corresponding 3D printing nozzle 9 needs to be selected, the moving component 2 will drive the moving block 3 to move to one side under the system control, thereby driving the mounting block 4 fixed on the moving block 3 to move towards the target 3D printing nozzle 9. This allows the locking block 11, which is fixed to the mounting plate 8 by the U-shaped plate 10 in the electromagnetic adsorption mechanism, to be precisely inserted into the locking slot 5 on the mounting block 4. Then, the electromagnet 6 on the inner wall of the locking slot 5 is energized, causing the electromagnet 6 to generate a strong magnetic force, thus adsorbing the nozzle. The iron plate 12 is fixedly connected to the locking block 11. Then, the moving component 2 drives the moving block 3 to move away from the 3D printing nozzle 9. At this time, the electromagnet 6 pulls the locking block 11 with a strong attraction. The locking block 11 then pulls the U-shaped plate 10 and the mounting plate 8 fixedly connected to the U-shaped plate 10, so that the mounting plate 8 slides on the positioning rod 7 until it is completely separated from the positioning rod 7. After separation, the moving component 2 can drive the 3D printing nozzle 9 to move according to the set program of the FDM multi-color 3D printer body 1, and use the 3D printing nozzle 9 to complete the printing operation of the required object. When it is necessary to replace other 3D... When printing nozzle 9, the moving component 2 moves the current 3D printing nozzle 9 via the moving block 3, causing the mounting plate 8 connected to the 3D printing nozzle 9 to re-slide and reconnect with the positioning rod 7. When the mounting plate 8 reaches the corresponding position of the positioning rod 7, the electromagnet 6 is de-energized, and its attraction to the iron plate 12 disappears. At this time, the moving component 2 moves the moving block 3 away from the 3D printing nozzle 9, causing the locking block 11 to disengage from the slot 5 on the mounting block 4. This, in turn, causes the iron plate 12 on the locking block 11 to separate from the electromagnet 6 and completely exit the slot 5, thereby releasing the mounting block 4 from the 3D printing nozzle. The connection between the nozzles 9 is then established. The moving component 2 can then drive the moving block 3 and the mounting block 4 to move to the next target 3D printing nozzle 9 via system settings. The connection method described above is repeated to achieve electromagnetic adsorption connection with the corresponding 3D printing nozzle 9. The entire switching process is convenient to operate and stable in use. Since the electromagnet 6 will fit tightly with the iron plate 12 after being energized, it can effectively avoid the problem of large gaps compared with the traditional mechanical connection method. This makes it less likely for the 3D printing nozzle 9 to shake during the switching process, thereby reducing the positional deviation of the 3D printing nozzle 9 during use and significantly improving the printing quality.
[0023] In a further preferred embodiment of the present invention, the electromagnetic adsorption mechanism includes: a locking block 11 fixedly mounted on the mounting plate 8 via a U-shaped plate 10, the locking block 11 being adapted to the locking slot 5, and an iron plate 12 fixedly mounted on the locking block 11; and an electromagnet 6 fixedly mounted on the inner wall of the locking slot 5 for adsorbing the iron plate 12.
[0024] In this embodiment, when the FDM multicolor 3D printer body 1 is in the printing-ready state, all non-working mounting plates 8 are mounted on the positioning rods 7, and multiple sets of 3D printing nozzles 9 are synchronously in a standby state along with their corresponding mounting plates 8. When the system determines that the target 3D printing nozzle 9 needs to be activated, the moving component 2 moves the moving block 3 and the mounting block 4 fixed on the moving block 3 under the command of the control system, so that the slot 5 on the mounting block 4 is aligned with the corresponding locking block 11 of the target 3D printing nozzle 9, and the slot 5 on the mounting block 4 can engage with the locking block 11 through movement. Subsequently, the electromagnet 6 on the inner wall of the slot 5 is energized to generate a strong magnetic force. The iron plate 12 is adsorbed and fixed on the card block 11, thereby realizing the electromagnetic adsorption connection between the mounting block 4 and the 3D printing nozzle 9. Then, the moving component 2 can drive the moving block 3 to move away from the 3D printing nozzle 9. At this time, the electromagnet 6 pulls the card block 11 with a strong attraction. The card block 11 then pulls the U-shaped plate 10 and the mounting plate 8 fixedly connected to the U-shaped plate 10, so that the mounting plate 8 slides on the positioning rod 7 until it is completely separated from the positioning rod 7. After separation, the moving component 2 can drive the 3D printing nozzle 9 to move according to the setting program of the FDM multi-color 3D printer body 1, and use the 3D printing nozzle 9 to complete the required process. The printing operation of the object; when it is necessary to switch to another 3D printing nozzle 9, the currently working 3D printing nozzle 9 first stops the extrusion action, and then the moving component 2 drives the current 3D printing nozzle 9 to move through the moving block 3, so that the mounting plate 8 connected to the 3D printing nozzle 9 and the positioning rod 7 are re-slidably connected. When the mounting plate 8 reaches the corresponding position of the positioning rod 7, the electromagnet 6 is de-energized, and its attraction force on the iron plate 12 disappears. At this time, the moving component 2 drives the moving block 3 to move away from the 3D printing nozzle 9, so that the locking block 11 disengages from the locking slot 5 on the mounting block 4, and then drives the iron plate 12 on the locking block 11. The electromagnet 6 is separated from the slot 5, thus terminating the connection between the mounting block 4 and the 3D printing nozzle 9. Afterward, the moving component 2 can be driven by the system settings to move the moving block 3 and the mounting block 4 to the next target 3D printing nozzle 9. The above connection method is repeated to achieve electromagnetic adsorption connection with the corresponding 3D printing nozzle 9. The connection method is relatively simple. Compared with the traditional mechanical connection method, this electromagnetic adsorption connection method can effectively avoid the problem of large gaps, making it less likely for the 3D printing nozzle 9 to shake during the switching process, thereby reducing the positional deviation of the 3D printing nozzle 9 during use and improving printing quality.
[0025] In a further preferred embodiment of the present invention, the electromagnetic adsorption switching mechanism further includes a disassembly mechanism mounted on the mounting plate 8 for fixing the mounting plate 8.
[0026] In this embodiment, the use of the disassembly mechanism can fix the position of the mounting plate 8, and can also release the position of the mounting plate 8 when encountering a large pulling force, making it convenient to use.
[0027] In a further preferred embodiment of the present invention, the disassembly mechanism includes: a mounting groove 13 formed on the mounting plate 8, the inner wall of the mounting groove 13 having an opening 14; a fixing plate 15 fixedly mounted on the mounting plate 8 by bolts 26, a sliding rod 16 fixedly mounted on the fixing plate 15, the sliding rod 16 being located inside the opening 14; a mounting sleeve 18 slidably mounted on the sliding rod 16 by a slider 17, the mounting sleeve 18 having a spring 19 disposed inside, the mounting sleeve 18 being located inside the mounting groove 13; a connecting plate 20 slidably mounted on the sliding rod 16, the connecting plate 20 being in contact with the spring 19; and a triangular block 22 fixedly mounted on the connecting plate 20 by a connecting post 21, the triangular block 22 being adapted to the triangular groove 23 on the positioning rod 7.
[0028] In this embodiment, when the mounting plate 8 is about to detach from the positioning rod 7 under tension, during the detachment process, the inclined surface of the triangular block 22 and the inclined surface of the triangular groove 23 slide relative to each other due to the force, thereby pushing the triangular block 22 to gradually detach from the triangular groove 23, and at the same time driving the connecting column 21, the connecting column 21 then drives the connecting plate 20 to slide along the slide rod 16. During the sliding process of the connecting plate 20, the spring 19 in the mounting sleeve 18 is squeezed simultaneously. After the triangular block 22 completely detaches from the triangular groove 23, the resistance on the mounting plate 8 is greatly reduced, and it can smoothly slide along the positioning rod 7 until it is completely detached; when the mounting plate 8 When the mounting plate 8 moves in the reverse direction and slides onto the positioning rod 7, the triangular block 22 will be squeezed to the corresponding avoidance position by the end of the positioning rod 7. As the mounting plate 8 continues to move to the preset installation position, the spring 19 uses its own elastic potential energy to push the connecting plate 20 to slide in the reverse direction along the slide rod 16. The connecting plate 20 drives the connecting column 21 and the triangular block 22 to move synchronously, so that the triangular block 22 is reinserted into the triangular groove 23 on the positioning rod 7. Thus, after the connection between the mounting block 4 and the 3D printing nozzle 9 is released, the mounting plate 8 can also be stably fixed on the positioning rod 7, and there will be no problem of automatic detachment.
[0029] In a further preferred embodiment of the present invention, the triangular block 22 is provided with a ball bearing 28 for rolling in the triangular groove 23, and the ball bearing 28 is in contact with the inner wall of the triangular groove 23.
[0030] In this embodiment, when the mounting plate 8 is about to detach from the positioning rod 7 under tension, during the detachment process, the inclined surface of the triangular block 22 and the inclined surface of the triangular groove 23 slide relative to each other due to the force. At this time, the ball bearings 28 set on the triangular block 22 will also roll in the triangular groove 23 at the same time, which can effectively reduce the friction between the triangular block 22 and the triangular groove 23, effectively avoid jamming, and reduce the wear and tear of the inclined surfaces during long-term use. This prevents scratches, deformation or material loss on the inclined surfaces caused by repeated sliding friction, thereby ensuring the long-term stable fit accuracy of the triangular block 22 and the triangular groove 23 and improving their service life.
[0031] In a further preferred embodiment of the present invention, a screw 24 for lifting and lowering the mounting sleeve 18 is threadedly installed on the fixing plate 15. One end of the screw 24 is rotatably connected to the mounting sleeve 18 through a bearing 25, and the other end of the screw 24 is fixedly installed with a knob 39 for rotating the screw 24. An anti-slip plate 40 is fixedly installed on the knob 39.
[0032] In this embodiment, when the spring 19 needs to be replaced due to elastic decay or damage from long-term use, the fixing plate 15 and the mounting plate 8 are first disconnected by removing the bolt 26. Then, the fixing plate 15 is pulled outward by holding the knob 39, so that the mounting sleeve 18, spring 19, connecting plate 20 and other related structures in the mounting groove 13 are moved out of the opening 14 as a whole. Then, the operator holds the anti-slip plate 40 on the knob 39 and rotates the knob 39. Because the anti-slip plate 40 increases the friction between the hand and the knob 39, it is not easy for the operator's hand to slip during rotation. And the screw 24 is threadedly connected to the fixing plate 15, so the screw 24 moves on the fixing plate 15 while rotating. One end of the screw 24 is rotatably connected to the mounting sleeve 18 through the bearing 25, so that when the screw 24 moves, it can drive the mounting sleeve 18 to move synchronously, so that the mounting sleeve 18 moves away from the connection. As plate 20 moves, slider 17, which is fixedly connected to mounting sleeve 18, slides synchronously along slide rod 16. When mounting sleeve 18 moves to a suitable position that allows spring 19 to completely disengage, the old spring 19 can be removed from between mounting sleeve 18 and connecting plate 20. Then, the new spring 19 is placed between mounting sleeve 18 and connecting plate 20. Then, knob 39 is rotated in the opposite direction. Knob 39 drives screw 24 to rotate in the opposite direction. Screw 24 moves in the opposite direction on fixed plate 15. Through bearing 25, it drives mounting sleeve 18 to move closer to connecting plate 20. Slider 17 also slides in the opposite direction along slide rod 16. When the new spring 19 is completely inside mounting sleeve 18 and is tightly clamped between mounting sleeve 18 and connecting plate 20 and is in a suitable pre-tightened state, the installation of the new spring 19 is completed. The entire replacement process is convenient and can be completed without complicated tools.
[0033] In a further preferred embodiment of the present invention, a baffle 27 is fixedly installed on the slide bar 16. The baffle 27 is circular and is used to block the connecting plate 20.
[0034] In this embodiment, the baffle 27 fixedly installed on the slide rod 16 is circular and can reliably limit and block the connecting plate 20 that is slidably installed on the slide rod 16, effectively preventing the connecting plate 20 from detaching from the slide rod 16 due to excessive movement. This protective function is particularly crucial during the replacement of the spring 19. When it is necessary to replace the spring 19 that has lost elasticity or is damaged after long-term use, the operator first removes the bolt 26 to release the fixing plate 15 from the mounting plate 8, and then pulls the fixing plate 15 outward by holding the knob 39. At this time, the mounting sleeve 18, spring 19, connecting plate 20, connecting post 21, triangular block 22 and other related structures in the mounting groove 13 will be moved out of the opening 14 along with the fixing plate 15. During this process, the spring 19 may still have some residual elastic potential energy, or it may be subjected to vibration or heavy force during the pulling process. Factors such as force can easily push the connecting plate 20 to slide away from the mounting sleeve 18 along the slide rod 16. Without the limiting of the baffle 27, the connecting plate 20 is very likely to completely detach from the slide rod 16 due to this uncontrolled sliding, which would cause components such as the connecting post 21 and the triangular block 22 to fall off along with the connecting plate 20. This would not only cause components to scatter, be lost or accidentally damaged, but also increase the difficulty of subsequent reassembly. The circular baffle 27, through its firm fixation to the slide rod 16, is located precisely on the side of the connecting plate 20 away from the mounting sleeve 18. When the connecting plate 20 slides along the slide rod 16 under the pushing force of the spring 19, its travel distance is strictly limited by the baffle 27. Once the connecting plate 20 contacts the baffle 27, it cannot continue to move outward, thereby ensuring that the connecting plate 20 is always stably fitted on the slide rod 16 and avoiding the occurrence of detachment.
[0035] In a further preferred embodiment of the present invention, the electromagnetic adsorption switching mechanism further includes a blower mechanism mounted on the movable block 3 for cooling the printed object.
[0036] In this embodiment, the use of a blower mechanism can cool the object during the printing process, allowing the printed object to take better shape and avoiding quality problems caused by slow cooling.
[0037] In a further preferred embodiment of the present invention, the blower mechanism includes: a fixing groove 29 formed on the movable block 3, the inner wall of the fixing groove 29 having a through hole 30; a blower cover 31 fixedly installed on the movable block 3, the blower cover 31 communicating with the through hole 30; and a motor 33 fixedly installed in the fixing groove 29 by a support rod 32, the output shaft of the motor 33 having a fan blade 34 fixedly installed on it.
[0038] In this embodiment, during the printing process of the FDM multicolor 3D printer body 1, the blower mechanism installed on the moving block 3 is simultaneously activated to cool the printed object. When the blower mechanism is in use, the motor 33 drives the fan blades 34 to rotate at high speed. The airflow generated by the rotation of the fan blades 34 is introduced into the blower shroud 31 through the through hole 30 connected to the inner wall of the fixed groove 29. After the airflow is gathered by the blower shroud 31, it is directed to the surface of the printed object extruded by the 3D printing nozzle 9. During the printing process, when the moving component 2 moves the moving block 3 and the 3D printing nozzle 9 along the preset path, the blower mechanism moves synchronously with the moving block 3, so that the airflow always acts precisely on the molten area of the printed object, quickly removes heat to achieve cooling and solidification, and continuously cools the newly printed area until the entire printing operation is completed. The motor 33 is de-energized, the fan blades 34 stop rotating, and the blower mechanism stops working.
[0039] In a further preferred embodiment of the present invention, a threaded tube 35 is fixedly installed on one side of the movable block 3. The threaded tube 35 is connected to the fixed groove 29. A cover 36 is threadedly installed on the threaded tube 35. An installation port 37 is provided on the cover 36. A filter screen 38 for blocking impurities is fixedly installed on the inner wall of the installation port 37.
[0040] In this embodiment, when the motor 33 drives the fan blade 34 on the output shaft to rotate at high speed, a negative pressure is formed in the fixing groove 29. Outside air enters through the mounting port 37 of the cover 36. When it flows through the filter screen 38, impurities are intercepted and filtered by the filter screen 38. Clean air flows into the fixing groove 29 through the threaded tube 35, preventing impurities from contacting the motor 33, fan blade 34 and other components, thus ensuring internal cleanliness. The filtered clean airflow is then introduced into the blower hood 31 connected to the through hole 30 in the inner wall of the fixing groove 29. After being gathered by the blower hood 31, it is blown in a direction towards the molten area extruded by the 3D printing nozzle 9, where it cools and solidifies rapidly. When the filter screen 38 needs to be cleaned or replaced due to the accumulation of impurities from long-term use, the operator can hold the cover 36 and rotate it. Using the threaded connection between the threaded tube 35 and the cover 36, the cover 36 can be disassembled from the threaded tube 35. After cleaning or replacing the filter screen 38, the cover 36 can be screwed back into the threaded tube 35 to fix it. The operation is relatively convenient.
[0041] In summary, compared with related technologies, this solution, through the coordinated use of the moving component 2, moving block 3, mounting block 4, slot 5, and electromagnetic adsorption mechanism, enables rapid connection between the mounting block 4 and the 3D printing nozzle 9 via electromagnetic adsorption. After connection, the moving component 2 can drive the moving block 3 to move away from the 3D printing nozzle 9. At this time, the strong suction force can pull the mounting plate 8 to slide on the positioning rod 7 until it is completely detached from the positioning rod 7. After detachment, the moving component 2 can drive the 3D printing nozzle 9 to move according to the program set by the FDM multi-color 3D printer body 1, using the 3D printing nozzle 9 to complete the printing operation of the desired object. Conversely, the connection between the mounting block 4 and the 3D printing nozzle 9 can be quickly released, and the mounting plate 8 can be fitted onto the positioning rod 7. Thus, there can be multiple sets of components such as the 3D printing nozzle 9, allowing the mounting block 4 to achieve electromagnetic adsorption connection with the corresponding 3D printing nozzle 9 using the moving component 2. The entire switching process is convenient to operate and stable in use. Since the electromagnet 6 in the electromagnetic adsorption mechanism will fit tightly against the iron plate 12 after being energized, compared with the traditional mechanical connection method, it can effectively avoid the problem of large gaps, making it less likely for the 3D printing nozzle 9 to shake during the switching process, thereby reducing the positional deviation of the 3D printing nozzle 9 during use and significantly improving the printing quality.
[0042] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.
[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.
Claims
1. An electromagnetic adsorption switching mechanism, comprising a movable component (2) disposed on the body (1) of an FDM multicolor 3D printer, characterized in that, A movable block (3) is fixedly installed on the movable component (2); A mounting block (4) is fixedly installed on the movable block (3), and a slot (5) is provided on the mounting block (4); A positioning rod (7) is fixedly installed on the body (1) of the FDM multicolor 3D printer. An installation plate (8) is slidably installed on the positioning rod (7). A 3D printing nozzle (9) for printing objects is fixedly installed on the installation plate (8). An electromagnetic adsorption mechanism for quickly switching 3D printing nozzles (9) is mounted on the mounting plate (8).
2. The electromagnetic adsorption switching mechanism as described in claim 1, characterized in that, The electromagnetic adsorption mechanism includes: A card block (11) is fixedly installed on the mounting plate (8) by a U-shaped plate (10). The card block (11) is adapted to the card slot (5). An iron plate (12) is fixedly installed on the card block (11). An electromagnet (6) is fixedly installed on the inner wall of the slot (5) for adsorbing the iron plate (12).
3. The electromagnetic adsorption switching mechanism as described in claim 1, characterized in that, The electromagnetic adsorption switching mechanism also includes a disassembly mechanism installed on the mounting plate (8) for fixing the mounting plate (8).
4. The electromagnetic adsorption switching mechanism as described in claim 3, characterized in that, The disassembly mechanism includes: A mounting groove (13) is formed on the mounting plate (8), and an opening (14) is formed on the inner wall of the mounting groove (13). A fixing plate (15) is fixedly installed on the mounting plate (8) by bolts (26), and a slide rod (16) is fixedly installed on the fixing plate (15). The slide rod (16) is located inside the opening (14). The mounting sleeve (18) is slidably mounted on the slide rod (16) by the slider (17), and a spring (19) is provided inside the mounting sleeve (18). The mounting sleeve (18) is located inside the mounting groove (13). A connecting plate (20) is slidably mounted on the slide rod (16), and the connecting plate (20) is in contact with the spring (19); A triangular block (22) is fixedly installed on the connecting plate (20) by a connecting post (21), and the triangular block (22) is adapted to the triangular groove (23) on the positioning rod (7).
5. The electromagnetic adsorption switching mechanism as described in claim 4, characterized in that, The triangular block (22) is provided with a ball (28) for rolling in the triangular groove (23), and the ball (28) is in contact with the inner wall of the triangular groove (23).
6. The electromagnetic adsorption switching mechanism as described in claim 4, characterized in that, The fixed plate (15) is threaded with a screw (24) for lifting the mounting sleeve (18). One end of the screw (24) is rotatably connected to the mounting sleeve (18) through a bearing (25). The other end of the screw (24) is fixedly installed with a knob (39) for rotating the screw (24). An anti-slip plate (40) is fixedly installed on the knob (39).
7. The electromagnetic adsorption switching mechanism as described in claim 4, characterized in that, A baffle (27) is fixedly installed on the slide bar (16). The baffle (27) is circular and is used to block the connecting plate (20).
8. The electromagnetic adsorption switching mechanism as described in claim 1, characterized in that, The electromagnetic adsorption switching mechanism also includes a blower mechanism installed on the movable block (3) for cooling the printed object.
9. The electromagnetic adsorption switching mechanism as described in claim 8, characterized in that, The blower mechanism includes: A fixing groove (29) is formed on the movable block (3), and a through hole (30) is formed on the inner wall of the fixing groove (29). A blower hood (31) is fixedly installed on the movable block (3), and the blower hood (31) is connected to the through hole (30); A motor (33) is fixedly installed in the fixing groove (29) by a support rod (32), and a fan blade (34) is fixedly installed on the output shaft of the motor (33).
10. The electromagnetic adsorption switching mechanism as described in claim 9, characterized in that, A threaded tube (35) is fixedly installed on one side of the movable block (3). The threaded tube (35) is connected to the fixed groove (29). A cover (36) is threadedly installed on the threaded tube (35). An installation port (37) is opened on the cover (36). A filter screen (38) for blocking impurities is fixedly installed on the inner wall of the installation port (37).