Printhead and three-dimensional printer

Abstract

The utility model relates to 3D printing technical field, concretely is printing head and three -dimensional printer, printing head includes including printing head main part, protective shell, heat dissipation unit and sealed assembly, printing head main part outside sets up protective shell, printing head main part passes out protective shell, connects heat dissipation unit on protective shell, sealed assembly is connected on protective shell, and sealed assembly includes protective plate, telescopic device, adjusting lever and movable part. In the utility model, when printing head is idle, the protective plate can be obliquely moved and set on the outside of the printing head main body to form a protection space with the protective shell, completely wrapping the key parts of the printing head main body, providing all-round protection for the printing head main body. The protective shell can block most dust, debris and other impurities from directly contacting the printing head main body, preventing them from adhering to the key parts such as the nozzle and the spray head, causing the nozzle to be blocked.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, specifically to a print head and a 3D printer. Background Technology

[0002] In a 3D printer, the extruder of the print head forces filamentous material into the nozzle, where it is melted and ejected from the nozzles onto the printing platform. The relative movement between the print head and the printing platform ultimately completes the printing of the model.

[0003] Chinese Patent No. CN222135966U discloses a printhead and a 3D printer. The technical problem this invention aims to solve is achieved through the following technical means: One aspect of this invention is a printhead comprising a printhead module, an outer casing disposed outside the printhead module, and a plurality of heat dissipation modules disposed on the outer casing. The rear and lower parts of the outer casing are open. The printhead module is disposed in the middle inside the outer casing. The printhead module includes a nozzle that extends outward from the lower outer side of the outer casing. The plurality of heat dissipation modules are arranged on the left and right sides of the outer casing. The outer casing can enclose the printhead module, forming a protective layer to prevent contamination. Furthermore, the outer casing conceals the printhead module while the outer casing itself is exposed, making the overall printhead appear more aesthetically pleasing and neat. Additionally, the symmetrical design of the heat dissipation modules on both sides also enhances the aesthetic appeal. This invention relates to the technical field of 3D printing.

[0004] However, the above technical solutions only protect the printhead module by setting up a protective shell. But the printing environment usually contains dust, debris and other impurities. These impurities can easily adhere to the nozzles, printheads and other critical parts of the printhead, causing nozzle blockage, affecting the normal extrusion of consumables, thereby reducing print quality, and may even lead to printing failure. When the printhead is idle, its nozzles, printheads and other parts are directly exposed to the external environment, which is easily affected by dust, moisture and other factors, accelerating the aging and damage of components and shortening the life of the printhead. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a printhead and a 3D printer.

[0006] The technical solution of this utility model is: a printhead, including a printhead body, a protective shell sleeved on the outside of the printhead body, the printhead body extending out of the protective shell, and a heat dissipation unit on the protective shell. A sealing assembly, connected to a protective shell, includes a protective plate, a telescopic device, an adjusting rod, and a movable component. Symmetrically arranged telescopic devices are connected to the protective shell. An inclined adjusting rod is mounted on the telescopic end of the telescopic device and connected to the protective shell. The movable component is connected to the protective shell, and the protective plate is connected to the movable component. The movable component includes a fixed plate, a guide rod, and an elastic component. Two fixed plates are connected to the protective shell. Parallel guide rods pass through through holes in the fixed plates. One end of the guide rod is connected to a movable plate, which has a through hole for the adjusting rod. The other end of the guide rod is connected to the protective plate. The elastic component is positioned between the movable plate and the fixed plate and is fitted onto the guide rod. Vertical movement of the adjusting rod pushes the movable plate, guide rod, and protective plate to move in an inclined direction, fitting them onto the outside of the printhead body to form a protective space in conjunction with the protective shell.

[0007] Preferably, the sealing assembly further includes a mounting plate connected to the telescopic end of the telescopic device, and the mounting plate is connected to the adjusting rod.

[0008] Preferably, side plates are connected to both sides of the protective plate, and the side plates slide in contact with the protective shell.

[0009] Preferably, both protective plates are connected to a sealing gasket on opposite sides.

[0010] Preferably, the heat dissipation unit consists of two symmetrically arranged cooling fans that exhaust hot air out of the protective shell. The protective shell has two parallel air inlets that form an airflow path with the cooling fans.

[0011] Preferably, each air inlet is connected to a filter screen.

[0012] Preferably, the protective housing has an observation window made of transparent heat-resistant material.

[0013] A 3D printer includes the print head described above.

[0014] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: In this invention, when the printhead is idle, the protective plate can tilt and move to fit over the outside of the printhead body, forming a protective space with the protective shell. This completely encloses the key parts of the printhead body, providing all-round protection. The protective shell can block most dust, debris, and other impurities from directly contacting the printhead body, preventing them from adhering to the nozzles, printheads, and other key parts and causing nozzle blockage. This ensures that consumables can be extruded normally, effectively preventing external factors such as dust and moisture from corroding the nozzles, printheads, and other components, slowing down the aging and damage of components, and significantly extending the service life of the printhead. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 for Figure 1 A cross-sectional view; Figure 3 for Figure 2 Enlarged view of the structure at point A; Figure 4 This is a schematic diagram of a closed-system component. Reference numerals: 1. Printhead body; 2. Protective shell; 3. Heat dissipation unit; 4. Protective plate; 5. Telescopic device; 6. Adjusting rod; 7. Moving part; 8. Fixing plate; 9. Guide rod; 10. Elastic element; 11. Mounting plate; 12. Side plate; 13. Sealing gasket; 14. Cooling fan; 15. Air inlet; 16. Filter screen; 17. Observation window. Detailed Implementation

[0016] Example 1, as Figures 1-4 As shown, the present invention proposes a printhead including a printhead body 1, a protective shell 2, a heat dissipation unit 3 and a sealing component. The protective shell 2 is sleeved on the outside of the printhead body 1, and the printhead body 1 extends out of the protective shell 2. The heat dissipation unit 3 is connected to the protective shell 2. The heat dissipation unit 3 consists of two symmetrically arranged heat dissipation fans 14. The heat dissipation fans 14 exhaust hot air to the outside of the protective shell 2. The protective shell 2 has two parallel air inlets 15. The air inlets 15 and the heat dissipation fans 14 form an airflow passage. The heat dissipation fans 14 exhaust the hot air accumulated inside the protective shell 2 to the outside, thereby creating a negative pressure inside the protective shell 2 relative to the outside of the protective shell 2, and drawing in fresh air from the air inlets 15 to reduce the temperature. Each air inlet 15 is connected to a filter screen 16; the filter screen 16 is used to filter out impurities contained in the incoming air. The sealing assembly is connected to the protective shell 2. The sealing assembly includes a protective plate 4, a telescopic device 5, an adjusting rod 6, and a movable part 7. The symmetrically arranged telescopic devices 5 are connected to the protective shell 2. The telescopic devices 5 can be, but are not limited to, pneumatic or hydraulic cylinders, and are connected to external air supply or hydraulic equipment. The telescopic end of the telescopic device 5 is equipped with an inclined adjusting rod 6, which is connected to the protective shell 2. The movable part 7 is connected to the protective shell 2, and the protective plate 4 is connected to the movable part 7. The movable part 7 includes a fixed plate 8, a guide rod 9, and an elastic... Component 10 consists of two fixed plates 8 connected to the protective shell 2. Parallel guide rods 9 pass through through holes in the fixed plates 8. One end of the guide rod 9 is connected to a movable plate, which has a through hole for the adjustment rod 6. The other end of the guide rod 9 is connected to the protective plate 4. An elastic element 10 is positioned between the movable plate and the fixed plates 8 and is fitted onto the guide rod 9. The elastic element 10 may be, but is not limited to, a spring. The vertical movement of the adjustment rod 6 pushes the movable plate, guide rod 9, and protective plate 4 to move in an inclined direction, fitting them onto the outside of the printhead body 1 in conjunction with the protective shell 2 to form a protective space.

[0017] Example 2, as Figure 2 , Figure 4 As shown, the printhead proposed in this utility model, compared with Embodiment 1, describes the detailed structure of the sealing component in this embodiment. The sealing assembly also includes a mounting plate 11, which is connected to the telescopic end of the telescopic device 5 and is connected to the adjusting rod 6. The mounting plate 11 is connected to the adjusting rod 6 to facilitate its removal from the telescopic end of the telescopic device 5 for easy maintenance in the future. Both sides of the protective plate 4 are connected to side plates 12, which slide in contact with the protective shell 2. The side plates 12 can increase the contact area between the protective plate 4 and the protective shell 2, preventing leakage when one end of the protective plate 4 protrudes from the protective shell 2, thus preventing impurities from entering from that part. Both protective plates 4 are connected to a sealing gasket 13 on one side facing each other; the sealing gasket 13 is made of, but is not limited to, rubber material, and the sealing gasket 13 can reduce the generation of gaps so that fine dust cannot pass through. The protective shell 2 has an observation window 17, which is made of transparent heat-resistant material. The observation window 17 is made of materials such as glass and acrylic sheet, and the observation window 17 makes it convenient for staff to observe the working status of the print head body 1.

[0018] Example 3, as Figures 1-4 As shown, the present invention proposes a 3D printer, including the print head shown in Embodiment 1 or Embodiment 2.

[0019] In summary, when the printhead is idle, the telescopic end of the telescopic device 5 moves vertically downwards, and the adjusting rod 6, which is inclined at the telescopic end, moves downwards accordingly. The adjusting rod 6 pushes the movable plate connected to it, and the movable plate drives the guide rod 9 and the protective plate 4 to move in an inclined direction. At the same time, the elastic element 10 is compressed, and the two symmetrically arranged protective plates 4 move towards each other until they are fitted onto the outside of the printhead body 1, forming a closed or nearly closed protective space with the protective shell 2. When the printhead starts working, the telescopic end of the telescopic device 5 moves vertically upwards, and the adjusting rod 6 moves upwards accordingly. The pushing force of the adjusting rod 6 on the movable plate disappears. Under the elastic force of the elastic element 10 and the driving force of the adjusting rod 6, the movable plate drives the guide rod 9 to move in the opposite direction, moving the protective plate 4 away from the printhead body 1. The protective plate 4 opens when tilted, no longer obstructing the printhead body 1, allowing the printhead body 1 to perform normal filament extrusion and printing. During operation, the extruder and nozzle of the printhead body 1 generate a large amount of heat. The heat dissipation unit 3 starts working, and the cooling fan 14 exhausts hot air to the outside of the protective shell 2. Cold air from the outside enters the interior of the protective shell 2 through the air inlet 15. The filter screen 16 connected to the air inlet 15 can filter out dust and impurities in the outside air, preventing them from entering the interior of the protective shell 2 and contaminating the printhead. The cold air entering the protective shell 2 exchanges heat with the hot air generated by the printhead body 1. The hot air is exhausted to the outside of the protective shell 2 by the cooling fan 14, thus forming an effective airflow circulation, dissipating the heat generated by the printhead body 1 in a timely manner, and ensuring that the printhead body 1 operates in a suitable temperature environment.

[0020] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A printhead, characterized in that, include The printhead body (1) is covered with a protective shell (2) on its outside. The printhead body (1) extends out of the protective shell (2) and the protective shell (2) is equipped with a heat dissipation unit (3). A sealing assembly is connected to the protective shell (2). The sealing assembly includes a protective plate (4), a telescopic device (5), an adjusting rod (6), and a movable part (7). The symmetrically arranged telescopic devices (5) are connected to the protective shell (2). The telescopic end of the telescopic device (5) is equipped with an inclined adjusting rod (6). The adjusting rod (6) is connected to the protective shell (2). The movable part (7) is connected to the protective shell (2). The protective plate (4) is connected to the movable part (7). The movable part (7) includes a fixed plate (8), a guide rod (9), and an elastic element (10). The two fixed plates (8, 9, 10) are connected to the protective shell (2). 8) Connected to the protective shell (2), the parallel guide rod (9) passes through the through hole on the fixed plate (8). One end of the guide rod (9) is connected to the movable plate. The movable plate has a through hole for the adjusting rod (6). The other end of the guide rod (9) is connected to the protective plate (4). The elastic element (10) is set between the movable plate and the fixed plate (8) and sleeved on the guide rod (9). The adjusting rod (6) moves vertically to push the movable plate, the guide rod (9) and the protective plate (4) to move in the tilt direction and sleeved on the outside of the print head body (1) to cooperate with the protective shell (2) to form a protective space.

2. A printhead according to claim 1, characterized in that, The hermetic components also include Mounting plate (11) is connected to the telescopic end of telescopic device (5), and mounting plate (11) is connected to adjusting rod (6).

3. A printhead according to claim 1, characterized in that, The protective plate (4) is connected to side plates (12) on both sides, and the side plates (12) slide in contact with the protective shell (2).

4. A printhead according to claim 3, characterized in that, Both protective plates (4) are connected to sealing gaskets (13) on opposite sides.

5. A printhead according to claim 1, characterized in that, The heat dissipation unit (3) consists of two symmetrically arranged heat dissipation fans (14). The heat dissipation fans (14) exhaust hot air to the outside of the protective shell (2). The protective shell (2) has two parallel air inlets (15). The air inlets (15) and the heat dissipation fans (14) form an airflow passage.

6. A printhead according to claim 5, characterized in that, Each air inlet (15) is connected to a filter screen (16).

7. A printhead according to claim 1, characterized in that, The protective shell (2) has an observation window (17) on it, which is made of transparent heat-resistant material.

8. A three-dimensional printer, characterized in that, The printhead includes any of the claims 1-7.

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