Spray head device of 3D printer

Abstract

The utility model provides a 3D printer nozzle device. The 3D printer nozzle device comprises a nozzle, a nozzle head and a nozzle head cover which are sequentially and coaxially arranged from bottom to top, a first shaft cavity for a wire to penetrate through is formed in the heating piece; the hollow connecting rod is provided with a second shaft cavity for the wire to penetrate through; the wire feeding pipe is provided with a third shaft cavity for the wire to penetrate through; the exterior of the wire feeding pipe is coaxially sleeved with the heat dissipation unit; the spray head, the first shaft cavity, the second shaft cavity and the third shaft cavity are coaxially arranged and communicate with one another. The spray head device of the 3D printer has good heat dissipation performance and mechanical performance, and the heat dissipation stability can be guaranteed while the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of 3D printing, and in particular relates to a nozzle device of a 3D printer. Background Art

[0002] 3D printing technology is a manufacturing technology based on computer three-dimensional models, a method of building objects by stacking materials layer by layer. It is an additive manufacturing technology that has greater flexibility and creativity than traditional manufacturing technology. By controlling the printer through digital technology, it is possible to quickly manufacture complex structures and personalized designs without the need for additional tools or molds. With the continuous development of technology, 3D printing technology has been widely used in the fields of medicine, construction, aerospace, education, etc.

[0003] The heat dissipation performance of 3D printers has an important impact on the printing quality of 3D printers. If the nozzle temperature is too high, it will cause the nozzle to be blocked, the model cannot be printed normally, and the overall structure will be damaged. The current solution is to solve the problem of excessive temperature by continuously increasing the wind speed of the fan, but too fast wind speed will produce noise and increase the heating time. In addition, the fan cannot solve the problem of local heating very well.

[0004] Without blindly increasing the fan speed, it is a good choice to improve the heat dissipation efficiency by changing the structure of the heat sink. The current heat sink has a simple structure, poor heat dissipation performance, and is easy to break when encountering mechanical vibration, and cannot ensure stable heat dissipation. In addition, adding a fan in a suitable position can also improve the heat dissipation efficiency to a certain extent. To this end, we propose a new 3D printer nozzle device to solve these problems. Utility Model Content

[0005] In view of the above technical problems, the utility model provides a 3D printer nozzle device, which changes the structure of the original heat dissipation block, has good heat dissipation performance and mechanical properties, and uses a hollow shaft motor to provide a new heat dissipation method, which improves the heat dissipation efficiency while also ensuring the stability of heat dissipation.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0007] A 3D printer nozzle device, comprising:

[0008] Sprinklers;

[0009] A heating element, wherein a first shaft cavity is provided in the heating element for the wire to pass through;

[0010] A hollow connecting rod, on which a second shaft cavity is provided for the wire to pass through;

[0011] A wire inlet tube, on which a third axial cavity is provided for the wire to pass through;

[0012] The outer part of the wire inlet tube is coaxially sleeved with a heat dissipation unit;

[0013] The nozzle, the first shaft cavity, the second shaft cavity and the third shaft cavity are coaxially arranged and communicated with each other.

[0014] A fan unit is provided on the middle outer wall of the hollow connecting rod, and the fan unit is used to supply air to the heat dissipation unit located above the fan unit.

[0015] The heat dissipation unit is a heat dissipation block formed by a three-period minimal surface structure.

[0016] A first external threaded connection section is provided at one end of the hollow connecting rod, and the first external threaded connection section is threadedly connected to the wire inlet tube;

[0017] The other end is provided with a second external threaded connection section, and the second external threaded connection section is threadedly connected to the heating element. The middle part of the hollow connecting rod is provided with a third external threaded connection section;

[0018] The fan unit is a hollow shaft motor with fan blades;

[0019] The third external threaded connection section is threadedly connected to the hollow shaft motor.

[0020] A fourth external thread section is provided at the upper end of the nozzle, and the fourth external thread section is threadedly connected to the heating element.

[0021] A polygonal structure is provided between the spray head and the fourth external thread section for facilitating disassembly and installation by a wrench.

[0022] 1. The utility model uses a three-period minimal surface structure to form a new heat dissipation block, which greatly improves the heat dissipation efficiency. This structural design can provide a larger surface area, which is conducive to increasing the dissipation and conduction of heat. It can also increase the convection of heat inside the structure, further promoting the dissipation and conduction of heat, thereby making the heat dissipation more efficient. In addition, it usually has a highly symmetrical structure and a complex pore structure design, which enables it to evenly distribute stress when subjected to external loads, thereby improving the stability and rigidity of the overall structure. Thanks to its hollow structure or pore structure design, the three-period minimal surface structure can also achieve lightweight. This design effectively reduces the amount of material used and reduces the overall weight. By optimizing the structural design, unnecessary components and materials are reduced as much as possible while ensuring strength and rigidity, thereby achieving a lightweight effect.

[0023] 2. The utility model uses a central axis motor to set a fan between the heat sink and the heating element. On the one hand, it can speed up the air circulation speed between the pores of the heat sink and improve the heat dissipation efficiency. On the other hand, it can also reduce the temperature of the upper end of the heating element to a certain extent to prevent the consumables from melting before entering the nozzle, resulting in printing adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a cross-sectional view of the utility model;

[0026] Figure 3 It is a diagram of a fan unit of the utility model;

[0027] Figure 4 It is a diagram of a hollow connecting rod of the utility model;

[0028] Figure 5 It is a nozzle diagram of the utility model;

[0029] Figure 6 It is a diagram of a heating element of the utility model;

[0030] Wherein: 11, heat dissipation unit; 12, hollow connecting rod; 13 heating element; 14 nozzle; 15 fan unit. DETAILED DESCRIPTION

[0031] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0032] like Figure 1~2 As shown, the 3D printer nozzle device of the utility model is composed of a nozzle 14, a heat dissipation unit 11, a heating element 13, a nozzle 15 and a hollow connecting rod 12, which are coaxially arranged from bottom to top:

[0033] Nozzle 14;

[0034] A heating element 13, wherein a first shaft cavity is provided in the heating element for the wire to pass through;

[0035] A hollow connecting rod 12, on which a second axial cavity is provided for the wire to pass through;

[0036] A wire inlet tube, on which a third axial cavity is provided for the wire to pass through;

[0037] The outer part of the wire inlet tube is coaxially sleeved with a heat dissipation unit 11;

[0038] The nozzle 14, the first shaft cavity, the second shaft cavity and the third shaft cavity are coaxially arranged and interconnected.

[0039] As a preferred embodiment of the technical solution of the utility model, a fan unit is provided on the middle outer wall of the hollow connecting rod, and the fan unit is used to supply air to the heat dissipation unit located above it.

[0040] As a preferred embodiment of the technical solution of the utility model, the heat dissipation unit is a heat dissipation block formed by a three-periodic minimal surface structure.

[0041] like Figure 3 As shown, as a preferred embodiment of the technical solution of the utility model, one end of the hollow connecting rod is provided with a first external threaded connecting section, and the first external threaded connecting section is threadedly connected to the wire inlet tube;

[0042] The other end is provided with a second external threaded connection section, and the second external threaded connection section is threadedly connected to the heating element. The middle part of the hollow connecting rod is provided with a third external threaded connection section;

[0043] The fan unit is a hollow shaft motor with fan blades;

[0044] The third external threaded connection section is threadedly connected to the hollow shaft motor.

[0045] As a preferred embodiment of the technical solution of the utility model, a third external threaded connection section is provided in the middle of the hollow connecting rod;

[0046] The fan unit is a hollow shaft motor with fan blades;

[0047] The third external threaded connection section is threadedly connected to the hollow shaft motor;

[0048] The upper end of the hollow shaft motor is provided with a wire groove, through which a power line, a control signal line and a sensor line are led out, and the wires are used to connect an external power source and control the running state of the motor.

[0049] As a preferred embodiment of the technical solution of the utility model, a fourth external thread section is provided at the upper end of the nozzle, and the fourth external thread section is threadedly connected to the heating element.

[0050] As a preferred embodiment of the technical solution of the utility model, a polygonal structure is provided between the spray head and the fourth external thread section to facilitate disassembly and installation by a wrench.

[0051] When the 3D printer starts working, the filament enters from the wire inlet tube at the top of the heat sink, and first passes through the heat sink. Thanks to the excellent structure of the three-period minimal surface, by increasing the surface area, it can be more fully in contact with the surrounding environment, making it easier for heat to be conducted to the surrounding medium, thereby effectively improving the heat dissipation efficiency. In addition, its pore structure means that heat can be conducted through different paths, avoiding the situation where heat is concentrated in a certain part during the conduction process. This design of multiple heat conduction paths allows heat to be more evenly distributed throughout the structure, improving the efficiency of heat conduction, and can also increase heat convection inside the structure, further promoting heat dissipation and conduction. It can effectively reduce the heat of the entire structure and ensure the stable operation of the 3D printer. The characteristic of zero curvature in all directions enables it to evenly distribute stress when subjected to external loads, improves the stability and rigidity of the overall structure, and better protects the transmission of filaments.

[0052] After passing through the heat sink, the consumables enter the heating element 13 through the hollow connecting rod 12. When the 3D printer starts working, the heating element will be heated to a specific temperature, which depends on the printing material used. In the heating element, the printing material will be melted by the heat and become more fluid under the thermal conductivity of the heating element. Once the printing material reaches sufficient fluidity, it will be sent to the nozzle part. When the fan unit (15) is working, it can increase the circulation speed of air in the porous structure, improve the heat dissipation efficiency, and effectively reduce the temperature of the upper end of the heating element to prevent the consumables from melting before reaching the nozzle.

[0053] There is usually a small hole at the nozzle, through which the printing material is squeezed out to form a thin filament, which is then moved to the correct position by the nozzle, accumulated layer by layer, and finally a 3D printed model is constructed.

Claims

1. A 3D printer nozzle device, characterized in that: Including coaxial arrangement from bottom to top: Sprinklers; A heating element, wherein a first shaft cavity is provided in the heating element for the wire to pass through; A hollow connecting rod, on which a second shaft cavity is provided for the wire to pass through; A wire inlet tube, on which a third axial cavity is provided for the wire to pass through; The outer part of the wire inlet tube is coaxially sleeved with a heat dissipation unit; The nozzle, the first shaft cavity, the second shaft cavity and the third shaft cavity are coaxially arranged and interconnected; The heat dissipation unit is a heat dissipation block formed by a three-period minimal surface structure.

2. The 3D printer nozzle device according to claim 1, characterized in that: A fan unit is provided on the middle outer wall of the hollow connecting rod, and the fan unit is used to supply air to the heat dissipation unit located above the fan unit.

3. The 3D printer nozzle device according to claim 2, characterized in that: A first external threaded connection section is provided at one end of the hollow connecting rod, and the first external threaded connection section is threadedly connected to the wire inlet tube; The other end is provided with a second external thread connection section, and the second external thread connection section is threadedly connected to the heating element.

4. The 3D printer nozzle device according to claim 3, characterized in that: A third external threaded connection section is provided in the middle of the hollow connecting rod; The fan unit is a hollow shaft motor with fan blades; The third external threaded connection section is threadedly connected to the hollow shaft motor; The upper end of the hollow shaft motor is provided with a wire groove, through which a power line, a control signal line and a sensor line are led out, and the wires are used to connect an external power source and control the running state of the motor.

5. The 3D printer nozzle device according to claim 1, characterized in that: A fourth external thread section is provided at the upper end of the nozzle, and the fourth external thread section is threadedly connected to the heating element.

6. The 3D printer nozzle device according to claim 5, characterized in that: A polygonal structure is provided between the spray head and the fourth external thread section for facilitating disassembly and installation by a wrench.

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