A heating and heat dissipation structure for an FDM printer printhead

Abstract

This utility model relates to the technical field of printer hot-end related technologies, and particularly to a heating and heat dissipation structure for an FDM printer printhead. It includes a printhead frame, with a heat dissipation frame fixedly connected to the left side of the frame, and a throat assembly inserted into the upper surface of the heat dissipation frame. This FDM printer printhead heating and heat dissipation structure, through the throat assembly, allows for rapid extrusion of molten material adhering to the inner wall of the lower throat by using a servo motor to drive a threaded rod to rotate, thereby causing an arc-shaped slide plate and connecting plate to drive the extrusion cylinder downwards. This eliminates the need for manual removal, cleaning, and reloading of the throat on the hot end after stopping the printer, improving the efficiency of handling blockages and thus increasing printing efficiency. Furthermore, during short-duration printing, the cooperation of the heat dissipation fins, cooling fan, and heat dissipation cavity within the heat dissipation frame minimizes the impact of the heating device on the throat assembly, ensuring normal printing during short periods.

Description

Technical Field

[0001] This utility model relates to the technical field of printer hot end, and in particular to a heating and heat dissipation structure for an FDM printer printhead. Background Technology

[0002] FDM 3D printing refers to fused deposition modeling, a commonly used 3D printing method. It involves melting materials at high temperatures and then extruding them through tiny nozzles, layering them according to three-dimensional model data to ultimately form a solid model.

[0003] A search revealed a patent on the Chinese Patent Network (publication number: CN221737098U) for a heating and heat dissipation structure for an FDM printer nozzle. This utility model's throat assembly comprises three parts: an upper throat, a middle throat, and a lower throat. This design effectively reduces the heat conduction performance of the throat assembly. A gap exists between the outer wall of the lower throat and the inner wall of the middle throat, further reducing heat conduction between them. The upper throat is simply mounted on the radiator using a fastener, while the middle and lower throats are clamped together using an extrusion assembly, which is bolted to the radiator. This connection structure simplifies the installation of the throat assembly. Even if the surface of the molten material in the lower throat melts, it can still pass through the lower throat relatively easily due to its proximity to the extrusion assembly. Even if the molten material in the lower throat becomes clogged, the segmented design simplifies cleaning only the lower throat, eliminating the need to clean the entire throat assembly.

[0004] While the patent has some practical effects in actual use, it still has certain shortcomings. For example, if the material in the lower throat melts and sticks to the inner wall of the throat, the operator still needs to stop the printer, wait for the hot end temperature to drop, manually remove the lower throat, clean the material stuck inside, and then reload it for printing. This process still requires stopping the printer and manually cleaning the material inside the throat, which significantly affects the printing process and reduces printing efficiency, indicating room for improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a heating and heat dissipation structure for an FDM printer nozzle, in order to solve the problem mentioned in the background art that the existing technology, which uses a segmented throat tube for easy removal and cleaning of the internal material, still requires stopping the printer and manually completing the operation, which reduces printing efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an FDM printer printhead heating and heat dissipation structure, including a printhead frame, a connecting frame fixedly connected to the upper surface of the printhead frame, a heat dissipation frame fixedly connected to the left side of the printhead frame, a side frame fixedly connected to the left side of the heat dissipation frame, a base plate fixedly connected to the left side of the printhead frame, a heating device fixedly connected to the lower surface of the base plate, an extrusion device fixedly connected to the lower surface of the heating device, a throat assembly inserted into the upper surface of the heat dissipation frame, and a heat dissipation assembly fixedly connected to the left side of the side frame;

[0007] The throat assembly is used to automatically squeeze out the material adhering to the throat when it is blocked, and the heat dissipation assembly is used to reduce the impact of the heating device on the throat.

[0008] Preferably, the throat assembly includes an upper throat and a lower throat, with a connector fixedly connected to the top end of the upper throat, and the upper throat and the lower throat are fixedly connected.

[0009] Preferably, an arc-shaped sleeve is fixedly connected to the surface of the lower throat tube, a servo motor is fixedly connected to the top end of the arc-shaped sleeve, a threaded rod is fixedly connected to the output end of the servo motor, the bottom end of the threaded rod extends into the interior of the arc-shaped sleeve and is rotatably connected to the inner bottom wall of the arc-shaped sleeve, an arc-shaped sliding plate is slidably connected to the inner wall of the arc-shaped sleeve, a threaded hole is opened on the upper surface of the arc-shaped sliding plate, and the arc-shaped sliding plate is threadedly connected to the threaded rod through the threaded hole.

[0010] Preferably, the inner diameter of the lower throat tube is larger than the inner diameter of the upper throat tube, and an extrusion cylinder is slidably connected to the inner wall of the lower throat tube. The inner diameter of the extrusion cylinder is the same as the inner diameter of the upper throat tube. A first strip-shaped hole is opened on the surface of the lower throat tube at a position corresponding to the arc-shaped sleeve, and a second strip-shaped hole is opened on the surface of the arc-shaped sleeve at a position corresponding to the first strip-shaped hole.

[0011] Preferably, a connecting plate is fixedly connected to the surface of the extrusion cylinder, and one end of the connecting plate away from the extrusion cylinder extends through the first and second strip holes into the interior of the arc-shaped sleeve and is fixedly connected to the surface of the arc-shaped slide plate.

[0012] Preferably, the heat dissipation component includes a beveled frame, which is fixedly connected to the left side of the side frame by four mounting bolts. The left side of the side frame has four threaded grooves that are compatible with the mounting bolts. A heat dissipation fan is fixedly connected to the inner wall of the beveled frame, and an air inlet slot is provided on the left side of the beveled frame at a position corresponding to the heat dissipation fan.

[0013] Preferably, the heat dissipation frame has a heat dissipation cavity inside, and the front of the heat dissipation frame is connected to a water-cooled inlet pipe and a water-cooled outlet pipe, and both the water-cooled inlet pipe and the water-cooled outlet pipe are connected to the inside of the heat dissipation cavity. Heat dissipation fins are fixedly connected to the upper surface of the base plate, and the positions of the heat dissipation fins and the throat pipe assembly are corresponding. The positions of the heat dissipation fins and the heat dissipation fan are also corresponding.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This FDM printer nozzle heating and heat dissipation structure, through the setting of the throat assembly, can use a servo motor to drive the threaded rod to rotate, thereby causing the arc-shaped slide plate and connecting plate to drive the extrusion cylinder to descend on the inner wall of the lower throat, quickly extruding the raw material that is molten and adhered to the inner wall of the lower throat. It eliminates the need for operators to manually remove, clean, and refill the throat on the hot end after stopping the printer, improving the efficiency of handling blockages and thus improving printing efficiency. Furthermore, during short-time printing, the cooperation of the heat dissipation fins, heat dissipation fan, and heat dissipation cavity in the heat dissipation frame can minimize the impact of the heating device on the throat assembly, thereby ensuring normal printing during short periods of time. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the throat tube assembly of this utility model;

[0017] Figure 3 This is a schematic diagram of the front section of the throat tube assembly of this utility model;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the extrusion cylinder of this utility model.

[0019] In the diagram: 1. Nozzle frame; 2. Connecting frame; 3. Heat sink frame; 4. Side frame; 5. Base plate; 6. Heating device; 7. Extrusion device; 8. Throat assembly; 9. Heat sink assembly; 801. Upper throat; 802. Lower throat; 803. Connector; 804. Arc sleeve; 805. Servo motor; 806. Threaded rod; 807. Arc slide plate; 808. Extrusion cylinder; 809. Connecting plate; 901. Beveled frame; 902. Mounting bolt; 903. Cooling fan; 904. Air inlet slot; 905. Water-cooled inlet pipe; 906. Water-cooled outlet pipe; 907. Heat sink fins. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4This utility model provides a technical solution: an FDM printer printhead heating and heat dissipation structure, including a printhead frame 1, a connecting frame 2 fixedly connected to the upper surface of the printhead frame 1, a heat dissipation frame 3 fixedly connected to the left side of the printhead frame 1, a side frame 4 fixedly connected to the left side of the heat dissipation frame 3, a base plate 5 fixedly connected to the left side of the printhead frame 1, a heating device 6 fixedly connected to the lower surface of the base plate 5, an extrusion device 7 fixedly connected to the lower surface of the heating device 6, a throat assembly 8 inserted into the upper surface of the heat dissipation frame 3, and a heat dissipation assembly 9 fixedly connected to the left side of the side frame 4;

[0022] The throat assembly 8 is used to automatically squeeze out the material stuck in the throat when it is blocked, and the heat dissipation assembly 9 is used to reduce the impact of the heating device 6 on the throat.

[0023] Furthermore, the throat assembly 8 includes an upper throat 801 and a lower throat 802. A connector 803 is fixedly connected to the top end of the upper throat 801, and the upper throat 801 and lower throat 802 are fixedly connected. An arc-shaped sleeve 804 is fixedly connected to the surface of the lower throat 802. A servo motor 805 is fixedly connected to the top end of the arc-shaped sleeve 804. A threaded rod 806 is fixedly connected to the output end of the servo motor 805. The bottom end of the threaded rod 806 extends into the interior of the arc-shaped sleeve 804 and is rotatably connected to the inner bottom wall of the arc-shaped sleeve 804. An arc-shaped sliding plate 807 is slidably connected to the inner wall of the arc-shaped sleeve 804, and a threaded plate is formed on the upper surface of the arc-shaped sliding plate 807. The curved slide plate 807 is threadedly connected to the threaded rod 806 via a threaded hole. The inner diameter of the lower throat tube 802 is larger than that of the upper throat tube 801. An extrusion cylinder 808 is slidably connected to the inner wall of the lower throat tube 802. The inner diameter of the extrusion cylinder 808 is the same as that of the upper throat tube 801. A first strip-shaped hole is opened on the surface of the lower throat tube 802 at a position corresponding to the curved sleeve 804. A second strip-shaped hole is opened on the surface of the curved sleeve 804 at a position corresponding to the first strip-shaped hole. A connecting plate 809 is fixedly connected to the surface of the extrusion cylinder 808. The end of the connecting plate 809 away from the extrusion cylinder 808 extends through the first and second strip-shaped holes to the curved sleeve 804. The interior of 04 is fixedly connected to the surface of the arc-shaped slide plate 807. During long-term printing, the heat generated by the heating device 6 gradually increases, thus gradually increasing the impact on the throat assembly 8. When the raw material melts in the lower throat 802 and adheres to the inner wall of the lower throat 802, the operator can turn on the servo motor 805. The servo motor 805 drives the threaded rod 806 to rotate, and the threaded rod 806 drives the arc-shaped slide plate 807 to descend through the surface threads. The arc-shaped slide plate 807 can drive the extrusion cylinder 808 to descend along the inner wall of the lower throat 802 through the connecting plate 809. Since the extrusion cylinder 808 is in contact with the inner wall of the lower throat 802, therefore... The extrusion cylinder 808 can directly extrude the material adhering to the inner wall of the lower throat tube 802 without the need for manual removal, cleaning, and reinstallation of the throat tube on the hot end. This greatly improves the efficiency of handling blockages and thus increases printing efficiency. In addition, since the inner diameter of the extrusion cylinder 808 is the same as that of the upper throat tube 801, the material will not be blocked due to gaps when passing through the upper throat tube 801 and the extrusion cylinder 808 into the lower throat tube 802. Furthermore, the inner diameter of the lower throat tube 802 is larger than that of the upper throat tube 801 and the extrusion cylinder 808, so the material can enter the heating device 6 and the extrusion device 7 normally.

[0024] Furthermore, the heat dissipation assembly 9 includes a beveled frame 901, which is fixedly connected to the left side of the side frame 4 by four mounting bolts 902. The left side of the side frame 4 has four threaded grooves that mate with the mounting bolts 902. A cooling fan 903 is fixedly connected to the inner wall of the beveled frame 901. An air inlet slot 904 is provided on the left side of the beveled frame 901 at a position corresponding to the cooling fan 903. A heat dissipation cavity is provided inside the heat dissipation frame 3. A water-cooled inlet pipe 905 and a water-cooled outlet pipe 906 are respectively connected to the front of the heat dissipation frame 3, and both the water-cooled inlet pipe 905 and the water-cooled outlet pipe 906 are connected to the interior of the heat dissipation cavity. A heat dissipation fan is fixedly connected to the upper surface of the base plate 5. The heat sink fins 907 and 907 are positioned corresponding to the throat assembly 8 and the cooling fan 903. The cooling fan 903 can draw air through the air inlet slot 904 to generate wind and blow it directly onto the heat sink fins 907. The heat sink fins 907 can increase the heat dissipation efficiency of the throat surface and, together with the cooling fan 903, can improve the heat dissipation effect. In addition, the heat dissipation cavity in the heat dissipation frame 3 can quickly remove the heat from the throat position through the water cooling inlet pipe 905 and the water cooling outlet pipe 906, further reducing the impact of the heating device 6 on the throat assembly 8 and ensuring normal printing in a short time.

[0025] Working principle: During operation, the feed pipe is connected to the upper throat 801 via connector 803, and the raw material is driven through the upper throat 801 and lower throat 802 by the drive structure. After being melted by the heating device 6, it is discharged from the extrusion device 7, thus realizing 3D printing. At the same time, during the operation of the hot end, the water cooling mechanism adds cold water to the heat dissipation cavity in the heat dissipation frame 3 through the water cooling inlet pipe 905. The cold water absorbs the heat on the surface of the heat dissipation frame 3 and is discharged through the water cooling outlet pipe 906. The heat on the surface of the throat assembly 8 can be transferred to the heat dissipation fins 907. Meanwhile, the cooling fan 903 generates air force through the air inlet slot 904 and blows it onto the surface of the heat dissipation fins 907. Through the combined use of water cooling, air cooling and heat dissipation fins 907, the heating effect can be minimized. The device 6 affects the throat assembly 8, thereby reducing the probability of the raw material melting inside the throat, ensuring normal printing in short periods. However, during long-term printing, if the raw material melts inside the throat and adheres to the inner wall of the throat, the servo motor 805 is activated. The servo motor 805 drives the arc-shaped slide plate 807 to descend via the threaded rod 806, thereby driving the extrusion cylinder 808 to descend along the inner wall of the lower throat 802 via the connecting plate 809 passing through the first and second strip holes. The extrusion cylinder 808 can fit against the inner wall of the lower throat 802, thus directly extruding the raw material adhering to the inner wall of the lower throat 802. This eliminates the need for manual removal of the throat and cleaning of the molten raw material from the inner wall of the throat, greatly improving cleaning efficiency and thus printing efficiency.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A printhead heating and heat dissipation structure for an FDM printer, comprising a printhead frame (1), characterized in that: A connecting frame (2) is fixedly connected to the upper surface of the nozzle frame (1), a heat dissipation frame (3) is fixedly connected to the left side of the nozzle frame (1), a side frame (4) is fixedly connected to the left side of the heat dissipation frame (3), a base plate (5) is fixedly connected to the left side of the nozzle frame (1), a heating device (6) is fixedly connected to the lower surface of the base plate (5), an extrusion device (7) is fixedly connected to the lower surface of the heating device (6), a throat assembly (8) is inserted into the upper surface of the heat dissipation frame (3), and a heat dissipation assembly (9) is fixedly connected to the left side of the side frame (4). The throat assembly (8) is used to automatically squeeze out the raw material adhering to the throat when it is blocked, and the heat dissipation assembly (9) is used to reduce the impact of the heating device (6) on the throat.

2. The FDM printer printhead heating and heat dissipation structure according to claim 1, characterized in that: The throat assembly (8) includes an upper throat (801) and a lower throat (802). A connector (803) is fixedly connected to the top end of the upper throat (801), and the upper throat (801) and the lower throat (802) are fixedly connected.

3. The FDM printer printhead heating and heat dissipation structure according to claim 2, characterized in that: An arc-shaped sleeve (804) is fixedly connected to the surface of the lower throat tube (802). A servo motor (805) is fixedly connected to the top end of the arc-shaped sleeve (804). A threaded rod (806) is fixedly connected to the output end of the servo motor (805). The bottom end of the threaded rod (806) extends into the interior of the arc-shaped sleeve (804) and is rotatably connected to the inner bottom wall of the arc-shaped sleeve (804). An arc-shaped sliding plate (807) is slidably connected to the inner wall of the arc-shaped sleeve (804). A threaded hole is opened on the upper surface of the arc-shaped sliding plate (807). The arc-shaped sliding plate (807) is threadedly connected to the threaded rod (806) through the threaded hole.

4. The FDM printer printhead heating and heat dissipation structure according to claim 2, characterized in that: The inner diameter of the lower throat (802) is larger than that of the upper throat (801). An extrusion cylinder (808) is slidably connected to the inner wall of the lower throat (802). The inner diameter of the extrusion cylinder (808) is the same as that of the upper throat (801). A first strip hole is opened on the surface of the lower throat (802) at a position corresponding to the arc-shaped sleeve (804). A second strip hole is opened on the surface of the arc-shaped sleeve (804) at a position corresponding to the first strip hole.

5. The FDM printer printhead heating and heat dissipation structure according to claim 4, characterized in that: A connecting plate (809) is fixedly connected to the surface of the extrusion cylinder (808). The end of the connecting plate (809) away from the extrusion cylinder (808) extends through the first and second strip holes into the interior of the arc-shaped sleeve (804) and is fixedly connected to the surface of the arc-shaped slide plate (807).

6. The FDM printer printhead heating and heat dissipation structure according to claim 1, characterized in that: The heat dissipation component (9) includes a slanted frame (901), which is fixedly connected to the left side of the side frame (4) by four mounting bolts (902). The left side of the side frame (4) has four threaded grooves that are compatible with the mounting bolts (902). A heat dissipation fan (903) is fixedly connected to the inner wall of the slanted frame (901). An air inlet slot (904) is provided on the left side of the slanted frame (901) at a position corresponding to the heat dissipation fan (903).

7. The FDM printer printhead heating and heat dissipation structure according to claim 1, characterized in that: The heat dissipation frame (3) has a heat dissipation cavity inside. The front of the heat dissipation frame (3) is connected to a water-cooled inlet pipe (905) and a water-cooled outlet pipe (906), and both the water-cooled inlet pipe (905) and the water-cooled outlet pipe (906) are connected to the inside of the heat dissipation cavity. The upper surface of the base plate (5) is fixedly connected to heat dissipation fins (907). The heat dissipation fins (907) correspond to the position of the throat assembly (8) and the position of the heat dissipation fins (907) corresponds to the position of the heat dissipation fan (903).

Images