Automatic cleaning system for printing head of three-dimensional printer

Abstract

The utility model discloses an automatic cleaning system for a printing head of a three-dimensional printer, which comprises a printing system of the printer, a printer nozzle control system, a cleaning agent supply system and a cleaning agent recovery system. In addition to the main step of printing according to preset parameters, three sets of displacement steps are further set according to the virtual screw joint position of the anchor point device, one set of displacement steps is a logic path from the initial point position of a spray head to a butt joint pipe for supplying consumables, and the other set of displacement steps is a logic path from the initial point position of the spray head to a butt joint pipe for supplying cleaning agents. And the other set of displacement steps is a logic path from the initial point position of the spray head to the buffer head, so that the whole process of one-key consumable switching, cleaning agent cleaning and waste liquid recovery is realized, and the problems that when an existing 3d three-dimensional printer is used, replacement of consumables with different colors is inconvenient, and residues are inconvenient to clean after the consumables are replaced are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printers, in particular to an automatic cleaning system for a print head of a 3D printer. Background Art

[0002] 3D printer, also known as three-dimensional printer (3DP), is a machine of cumulative manufacturing technology, that is, rapid prototyping technology. It is based on a digital model file and uses special wax materials, powdered metal or plastic and other adhesive materials to print layers of adhesive materials to make three-dimensional objects. At present, 3D printers are used to manufacture products. The technology of constructing objects by printing layer by layer. The principle of 3D printer is to put data and raw materials into the 3D printer, and the machine will make the product layer by layer according to the program.

[0003] The biggest difference between 3D printers and traditional printers is that the "ink" they use is real raw materials, and there are many different forms of stacked thin layers. The types of media that can be used for printing are diverse, from a variety of plastics to metals, ceramics, and rubber-like substances. Some printers can also combine different media to make the printed object hard on one end and soft on the other.

[0004] At present, the most commonly used printer on the market is a device that uses resin materials for melt printing. During the use of this type of equipment, with the continuous increase in printing demand, the color requirements of the printed models are also getting higher and higher. It is often necessary to replace different color consumables according to the color of the model during printing. There are two types of color control of the printed model. One is the printing of different color areas of the same model, or the printing of different models with the same consumables of different colors. At present, the process of replacing different color consumables mostly uses manual replacement, which is very inconvenient to replace consumables. After replacing the consumables, it is necessary to wait for the temperature to drop before replacing the nozzle to avoid the influence of the residual consumables of the previous color on the next model, and then manually clean the inside of the replaced nozzle. There are few automated cleaning steps, which makes the current 3D printer unable to meet the use needs and the use process is also very inconvenient. In view of the above problems, an automatic cleaning system for the print head of a three-dimensional printer is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an automatic cleaning system for a print head of a 3D printer to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic cleaning system for a print head of a three-dimensional printer, comprising a printing system of the printer, a printer nozzle control system, a cleaning agent supply system and a cleaning agent recovery system, a nozzle fixing frame is arranged inside the printer, a nozzle mechanism is installed on the top of the nozzle fixing frame, an anchor device is installed on the top of the printer, and a recovery device is installed on the side of the printer;

[0007] The nozzle mechanism comprises a connecting pipe, a clamping claw is hinged on the top of the connecting pipe, and a permanent magnet capable of lifting and lowering is sleeved on the outside of the clamping claw;

[0008] The anchor point device comprises an anchor frame, which is mounted on the top of the printer, and a clamping hook is integrally stamped at the front end of the anchor frame, and a butt joint tube is clamped inside the clamping hook, and a convex body is arranged outside the butt joint tube, and the convex body can be clamped and positioned between the clamping claws;

[0009] The recycling device comprises a rack mounted on the outside of the printer, and a recycling box is mounted inside the rack;

[0010] The butt joint tube at least includes a consumable material input tube and a cleaning agent input tube, and the butt joint tube is provided with a plurality of consumable materials or cleaning agents that can be input into the interior of the nozzle mechanism.

[0011] Preferably, the printer includes a bracket, the interior of the bracket is equipped with a vertical guide rod, the exterior of the guide rod is equipped with a vertically lifting printing platform, the top lateral position of the bracket is equipped with a linear guide rail capable of longitudinal displacement, and the nozzle fixing frame is slidably mounted on the exterior of the linear guide rail.

[0012] Preferably, the bracket is composed of a combination of aluminum profiles, and a consumables rack is installed on the outside of the bracket, the hanging bracket is installed on the outside of the bracket by bolts, and the anchoring frame is installed on the top of the bracket by bolts.

[0013] Preferably, a connecting piece is mounted on the bottom end of the connecting pipe, a nozzle is mounted on the bottom end of the connecting piece, and a temperature controller is mounted on the outer wall of the connecting piece.

[0014] Preferably, a heat sink is mounted on the outside of the top end of the connecting pipe, and a fan is mounted on the outside of the heat sink, and the fan drives the airflow to flow in the gaps between the heat sinks.

[0015] Preferably, a flat groove is provided on the top side wall of the connecting pipe, a docking piece is mounted outside the flat groove, and the clamping claw is hinged to the top outside of the docking piece.

[0016] Preferably, an electromagnet ring is positioned externally at the bottom end of the docking piece, a guide hook is integrally formed on the top of the insulating core of the electromagnet ring, the permanent magnet is sleeved on the inner wall of the guide hook, the thickness of the guide hook is greater than the height of the hinge point of the clamp, and the thickness of the guide hook is less than the distance from the lowest position of the hinge point to the upper surface of the electromagnet ring.

[0017] Preferably, the magnetic pole of the electromagnet ring is an axial magnetic pole after power is supplied, the magnetic pole of the permanent magnet is an axial magnetic pole, and the top magnetic pole of the electromagnet ring after power is supplied is the same as the bottom magnetic pole of the permanent magnet.

[0018] Preferably, a groove engaging with the convex structure is provided inside the top end of the clamping jaw.

[0019] Preferably, the top end of the recovery box is slidably equipped with a sliding cover, and the top of the sliding cover is equipped with a buffer head.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows: the printing system of the utility model mainly includes a control system of the printer nozzle. In addition to the main step of printing according to preset parameters, three sets of displacement steps are also set according to the virtual screw position of the anchor device, one set of displacement steps is a logical path from the initial point of the nozzle to the docking tube for supplying consumables, one set of displacement steps is a logical path from the initial point of the nozzle to the docking tube for supplying cleaning agent, and another set of displacement steps is a logical path from the initial point of the nozzle to the buffer head. Therefore, the utility model can realize the whole process of one-click consumable switching, cleaning agent cleaning and waste liquid recovery through multiple paths, effectively solving the problem that it is inconvenient to replace consumables of different colors during use of existing 3D stereo printers and it is inconvenient to clean up the residue after replacing the consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model.

[0022] Figure 2 It is a schematic diagram of the assembly of the cleaning system of the utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the nozzle mechanism of the utility model.

[0024] Figure 4 It is a schematic diagram of the assembly of the nozzle mechanism of the utility model.

[0025] Figure 5 It is a schematic diagram of the assembly of the docking device of the nozzle mechanism of the utility model.

[0026] Figure 6 It is a structural schematic diagram of the opening state of the docking device of the nozzle mechanism of the utility model.

[0027] Figure 7This is a schematic diagram of the structure of the anchor device of the utility model.

[0028] Figure 8 This is a schematic diagram of the assembly of the anchor device of the utility model.

[0029] Fig. 9 It is a schematic diagram of the combined state of the anchor device and the docking device of the utility model.

[0030] Fig.10 It is a schematic diagram of the combined state of the anchor device and the docking device of the utility model in the opened state.

[0031] Fig.11 It is an assembly schematic diagram of the anchor device and the docking device of the utility model in a fixed state.

[0032] Fig.12 This is a schematic diagram of the structure of the recovery device of the utility model.

[0033] Fig.13 It is a schematic diagram of the assembly of the recycling device of the utility model.

[0034] In the figure: 1. printer, 11. bracket, 12. printing platform, 13. linear guide rail, 14. nozzle fixing frame, 15. consumables rack, 2. nozzle mechanism, 21. connecting pipe, 22. heat sink, 23. connecting piece, 24. temperature controller, 25. nozzle, 26. electromagnet ring, 27. guide hook, 28. permanent magnet, 29. docking piece, 210. clamping claw, 3. anchor device, 31. anchor frame, 32. clamping hook, 33. docking tube, 34. protrusion, 4. recovery device, 41. hanger, 42. recovery box, 43. sliding cover, 44. buffer head. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-13 The utility model provides a technical solution: an automatic cleaning system for a three-dimensional printer print head, comprising a printing system of a printer 1, a printer nozzle control system, a cleaning agent supply system and a cleaning agent recovery system, wherein a nozzle fixing frame 14 is provided inside the printer 1, a nozzle mechanism 2 is mounted on the top of the nozzle fixing frame 14, an anchor device 3 is mounted on the top of the printer 1, and a recovery device 4 is mounted on the side of the printer 1;

[0037] The nozzle mechanism 2 includes a connecting pipe 21, a clamping jaw 210 is hinged on the top of the connecting pipe 21, and a permanent magnet 28 capable of lifting and lowering is sleeved on the outside of the clamping jaw 210;

[0038] The anchor device 3 includes an anchor frame 31, which is mounted on the top of the printer 1. A clamping hook 32 is integrally stamped at the front end of the anchor frame 31. A butt joint tube 33 is clamped inside the clamping hook 32. A convex body 34 is arranged outside the butt joint tube 33. The convex body 34 can be clamped and positioned with the clamping claw 210.

[0039] The recycling device 4 includes a rack 41 mounted on the outside of the printer 1, and a recycling box 42 is mounted inside the rack 41;

[0040] The butt joint pipe 33 at least includes a consumable material input pipe and a cleaning agent input pipe. The butt joint pipe 33 is provided with a plurality of pipes to input consumable material or cleaning agent into the interior of the nozzle mechanism 2 .

[0041] The printing system of the present invention mainly includes a control system for a printer nozzle. In addition to the main step of printing according to preset parameters, three sets of displacement steps are also set according to the virtual screw position of the anchor device 3, one set of displacement steps is a logical path from the initial point of the nozzle to the docking tube 33 for supplying consumables, one set of displacement steps is a logical path from the initial point of the nozzle to the docking tube 33 for supplying cleaning agent, and another set of displacement steps is a logical path from the initial point of the nozzle to the buffer head 44. Therefore, the present invention can realize the whole process of one-click consumable switching, cleaning agent cleaning and waste liquid recovery through multiple paths, effectively solving the problem that it is inconvenient to replace consumables of different colors during use of existing 3D stereo printers and it is inconvenient to clean up the residue after replacing the consumables.

[0042] Specifically, the printer 1 includes a bracket 11, the interior of the bracket 11 is equipped with a vertical guide rod, the outside of the guide rod is equipped with a vertically lifting printing platform 12, the top lateral position of the bracket 11 is equipped with a linear guide rail 13 that can be longitudinally displaced, and the nozzle fixing frame 14 is slidably assembled on the outside of the linear guide rail 13.

[0043] The printer 1 of the utility model is as follows Figure 1 and Figure 2 As shown, the printing platform 12 is guided by four linear guide rod structures, and two sets of synchronous screw transmission structures are arranged in the middle to drive the printing platform 12 to rise and fall, and then cooperate with the nozzle structure moving in the horizontal position to realize the three-axis printing process.

[0044] The linear guide 13 and the nozzle fixing frame 14 are driven by two sets of synchronous belt drive systems respectively, driving the nozzle fixing frame 14 to move in the horizontal direction to realize the printing and displacement steps, and a moving mechanism capable of driving the nozzle fixing frame 14 to move relative to the outer slider of the linear guide is installed between the nozzle fixing frame 14 and the slider outside the linear guide 13. The mechanism is preferably an electromagnet structure, or it can be a small linear motor or electric push rod. Through the driving structure, the nozzle mechanism 2 can be displaced in a small range in the vertical direction as a whole, thereby realizing the lifting and plugging between the docking mechanism and the docking tube 33 and the plugging with the buffer head 44 of the recovery device 4.

[0045] Specifically, the bracket 11 is composed of a combination of aluminum profiles, and a consumable rack 15 is installed on the outside of the bracket 11, the hanger 41 is installed on the outside of the bracket 11 by bolts, and the anchor frame 31 is installed on the top of the bracket 11 by bolts. The bracket 11 is made of a combination of aluminum profiles, which is easy to assemble and install, easy to assemble, light in structure, and low in construction cost.

[0046] Specifically, the bottom end of the connecting tube 21 is equipped with a connecting piece 23, the bottom end of the connecting piece 23 is equipped with a nozzle 25, and the outer wall of the connecting piece 23 is equipped with a temperature controller 24. The temperature controller 24 is a heating device commonly used in 3D printers, which can heat the consumables so that the consumables melt inside the nozzle 25 to form a consumable pool, and output the consumable molten body by pressurized spraying or extrusion.

[0047] It should be noted that the overall structure of the 3D printer of the present invention adopts the existing 3D printer technology, and other additional equipment for printing including the structure of output consumables and transmission consumables are omitted.

[0048] Specifically, a heat sink 22 is installed on the outside of the top end of the connecting tube 21, and a fan is installed on the outside of the heat sink 22. The fan drives the airflow to flow in the gaps between the heat sinks 22. The purpose of using the heat sink is to prevent the heating temperature of the thermostat 24 from being transmitted to the consumables on the top through the connecting structure and passing through the cavity, causing the consumables to be heated in advance. The advantage of using this heat dissipation auxiliary structure compared to the thermal insulation structure of the prior art is that a certain temperature is retained during the heat dissipation process. When the consumables pass through the internal cavity of the heat sink, a certain temperature can be retained to achieve a preheating effect.

[0049] Specifically, a flat groove is formed on the top side wall of the connecting pipe 21, a docking piece 29 is mounted outside the flat groove, and the clamping jaw 210 is hinged to the top outside of the docking piece 29;

[0050] The docking mechanism as a whole is composed of a fixed docking member 29 and a clamping jaw 210 that can be flipped outward. When in use, there is a ring-shaped iron sheet on the top of the electromagnet ring 26. When the electromagnet is not turned on, the permanent magnet 28 is adsorbed on the outer surface of the iron sheet. After the electromagnet ring 26 is started, the repulsive force between the magnetic poles will push the permanent magnet 28 to move upward. The annular structure of the permanent magnet 28 is sleeved on the outer walls of multiple clamping jaws 210, thereby limiting the outward activity space of the clamping jaws 210, restricting the clamping jaws 210, and then the clamping operation can be achieved. During the overall lifting and lowering process of the nozzle mechanism 2, when the clamping jaw 210 moves upward, the convex body 34 will push the clamping jaw 210 open. After reaching the maximum position, the electromagnet ring 26 is started, pushing the permanent magnet 28 upward, locking the clamping jaw 210, and the clamping effect of the clamping jaw 210 on the convex body 34 can be achieved. After the electromagnet ring 26 is powered off, the lifting nozzle mechanism 2 can be docked or pulled out.

[0051] Specifically, an electromagnet ring 26 is positioned externally at the bottom end of the docking piece 29, and a guide hook 27 is integrally formed on the top of the insulating core of the electromagnet ring 26. The permanent magnet 28 is sleeved on the inner wall of the guide hook 27, and the thickness of the guide hook 27 is greater than the height of the hinge point of the clamp 210, and the thickness of the guide hook 27 is less than the distance from the lowest position of the hinge point to the upper surface of the electromagnet ring 26. When the permanent magnet 28 is at the lowest position, the activity space outside the clamp 210 is released, so the clamp 210 can expand outward by about 0° to 30°, releasing the groove inside the clamp 210. When the permanent magnet 28 is raised, the maximum position of the guide hook 27 is reached, and the permanent magnet 28 can limit the upper and lower halves of the hinge point position of the clamp 210 to the center position of the permanent magnet 28 ring, thereby limiting the movement of the clamp 210, realizing the clamping and disconnection actions, and then achieving the purpose of replacing or disconnecting the external input head. This process refers to the attached Figure 3 , Figure 4 , Figure 6 , Fig. 9 , Fig.10 as well as Fig.11 .

[0052] After the docking is completed, horizontal displacement is required to realize the unhooking operation between the docking tube 33 and the clamping hook 32, and then proceed to the subsequent steps.

[0053] Furthermore, the installation position of the anchor device 3 is not within the movement range of the printing work area, so as to avoid the rough pricing 31 affecting the printing path.

[0054] The docking tube 33 includes at least two functions. One is to connect with the consumable wire to achieve the clamping effect of the consumable. When in use, through the replacement steps, the action between the nozzle mechanism 2 and the docking tube 33 used to output the consumable can be realized to achieve the purpose of replacing the consumable. It is also possible to replace the external cleaning agent supply system to input the cleaning agent into the inside of the nozzle 25 to clean the consumable residue. Half of the cleaning agent uses a chemical material liquid that can dissolve the consumable, which is mainly used to clean the residue.

[0055] Specifically, the magnetic pole of the electromagnet ring 26 is an axial magnetic pole after being energized, the magnetic pole of the permanent magnet 28 is an axial magnetic pole, and the top magnetic pole of the electromagnet ring 26 after being energized is the same as the bottom magnetic pole of the permanent magnet 28.

[0056] Specifically, a groove is formed inside the top of the clamping jaw 210 to engage with the convex body 34 structure.

[0057] Specifically, a sliding cover 43 is slidably mounted on the top of the recovery box 42 , and a buffer head 44 is mounted on the top of the sliding cover 43 .

[0058] It should be noted that there are two ways to install the butt joint 33 for outputting the cleaning agent;

[0059] One is that the central axis of the butt joint tube 33 corresponds vertically to the central axis of the buffer head 44. After the nozzle mechanism 2 to be cleaned moves to this position, the vertical displacement mechanism will first press the buffer head 44 downward, and the buffer head 44 will be deformed to reserve a docking position at the top. Then, after the upward docking with the butt joint tube 33 is completed, the nozzle 25 still maintains a docking state with the opening at the top of the buffer head 44, and then after the cleaning agent completes the cleaning process, the waste liquid can be directly input into the interior of the recovery box 42;

[0060] Another installation method is that the anchor devices 3 are all installed in a non-conflicting position. When cleaning is needed, the nozzle mechanism 2 is docked with the docking pipe 33 for the cleaning agent output, and then moved to the position of the buffer head 44. After docking with the buffer head 44, the cleaning agent input system is started to input the cleaning agent to complete the cleaning action.

[0061] A vent hole is reserved at the top of the sliding cover 43 for discharging the internal gas when the waste liquid enters the recovery box 42. The inside of the vent hole is preferably equipped with a one-way air valve, and the air permeation direction is upward.

[0062] In all docking cleaning methods, the distance between the upper surface of the buffer head 44 and the protrusion 34 is greater than the distance between the lowest plane of the nozzle 25 and the groove of the clamp 210, and the maximum distance that the buffer head 44 can be compressed is greater than the docking distance of the nozzle mechanism 2.

[0063] The buffer head 44 is a bellows structure, made of corrosion-resistant material and has elasticity. Combined with the corrugated structure of the buffer head 44, it can realize the bellows structure of compression and pressure-loss rebound operation. The overall material of the buffer head 44 and the recovery box 42 cannot be made of materials that can be corroded by cleaning agents.

[0064] The cleaning agent supply system includes a pump body and a pipeline. The pump body preferably adopts a quantitative diaphragm pump or a gear pump, which can realize the quantitative input of the cleaning agent. The pipeline is connected between the pump body and the docking pipe 33.

[0065] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic cleaning system for a three-dimensional printer print head, comprising a printing system of a printer (1), a printer nozzle control system, a cleaning agent supply system and a cleaning agent recovery system, characterized in that: The printer (1) is provided with a nozzle fixing frame (14) inside, the top of the nozzle fixing frame (14) is equipped with a nozzle mechanism (2), the top of the printer (1) is equipped with an anchor device (3), and the side of the printer (1) is equipped with a recovery device (4); The nozzle mechanism (2) comprises a connecting pipe (21), the top of which is hingedly connected with a clamping claw (210), and the outside of the clamping claw (210) is sleeved with a permanent magnet (28) that can be raised and lowered; The anchor point device (3) comprises an anchor frame (31), the anchor frame (31) is mounted on the top of the printer (1), a clamping hook (32) is integrally stamped at the front end of the anchor frame (31), a butt joint tube (33) is clamped inside the clamping hook (32), a convex body (34) is arranged outside the butt joint tube (33), and the convex body (34) can be clamped and positioned with the clamping claw (210); The recycling device (4) comprises a rack (41) mounted on the outside of the printer (1), and a recycling box (42) is mounted inside the rack (41); The butt joint pipe (33) comprises at least a consumable material input pipe and a cleaning agent input pipe, and the butt joint pipe (33) is provided with a plurality of pipes capable of inputting consumable material or cleaning agent into the interior of the nozzle mechanism (2).

2. The automatic cleaning system for a 3D printer print head according to claim 1, characterized in that: The printer (1) comprises a bracket (11), the interior of the bracket (11) is equipped with a vertical guide rod, the exterior of the guide rod is equipped with a vertically lifting printing platform (12), the top lateral position of the bracket (11) is equipped with a linear guide rail (13) capable of longitudinal displacement, and the nozzle fixing frame (14) is slidably mounted on the exterior of the linear guide rail (13).

3. The automatic cleaning system for the print head of a 3D printer according to claim 2, characterized in that: The bracket (11) is composed of a combination of aluminum profiles, and a consumables rack (15) is installed on the outside of the bracket (11), the hanging rack (41) is installed on the outside of the bracket (11) by bolts, and the anchoring rack (31) is installed on the top of the bracket (11) by bolts.

4. The automatic cleaning system for a 3D printer print head according to claim 1, characterized in that: The bottom end of the connecting pipe (21) is equipped with a connecting piece (23), the bottom end of the connecting piece (23) is equipped with a nozzle (25), and the outer wall of the connecting piece (23) is equipped with a temperature controller (24).

5. The automatic cleaning system for the print head of a 3D printer according to claim 1, characterized in that: A heat sink (22) is mounted on the outside of the top end of the connecting pipe (21), and a fan is mounted on the outside of the heat sink (22), and the fan drives airflow to flow through the gaps between the heat sinks (22).

6. The automatic cleaning system for the print head of a 3D printer according to claim 5, characterized in that: A flat groove is provided on the top side wall of the connecting pipe (21), a docking piece (29) is mounted outside the flat groove, and the clamping claw (210) is hinged to the top outside of the docking piece (29).

7. The automatic cleaning system for the print head of a 3D printer according to claim 6, characterized in that: The bottom end of the docking piece (29) is positioned and assembled with an electromagnet ring (26) on the outside, and the top of the insulating core of the electromagnet ring (26) is integrally formed with a guide hook (27), and the permanent magnet (28) is sleeved on the inner wall of the guide hook (27), and the thickness of the guide hook (27) is greater than the height of the hinge point of the clamping claw (210), and the thickness of the guide hook (27) is less than the distance from the lowest position of the hinge point to the upper surface of the electromagnet ring (26).

8. The automatic cleaning system for the print head of a 3D printer according to claim 7, characterized in that: When the electromagnet ring (26) is energized, the magnetic pole is an axial magnetic pole, the magnetic pole of the permanent magnet (28) is an axial magnetic pole, and the top magnetic pole of the electromagnet ring (26) after energization is the same as the bottom magnetic pole of the permanent magnet (28).

9. The automatic cleaning system for a 3D printer print head according to claim 1, characterized in that: A groove is provided inside the top end of the clamping jaw (210) and is engaged with the convex body (34) structure.

10. The automatic cleaning system for a 3D printer print head according to claim 1, characterized in that: The top end of the recovery box (42) is slidably equipped with a sliding cover (43), and the top of the sliding cover (43) is equipped with a buffer head (44).

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