Print head apparatus and 3D printer

Abstract

The present application relates to the field of 3D printing, and in particular to a print head apparatus and a 3D printer. The print head apparatus comprises: a nozzle assembly; and a heating assembly, which is externally connected to the nozzle assembly and is connected to a power supply apparatus, wherein the nozzle assembly is configured to convey and extrude filaments in a first direction, and the heating assembly is configured to heat the nozzle assembly by means of electromagnetic induction under the action of the power supply apparatus, or to heat the nozzle assembly by means of electromagnetic induction and self-heating, such that the filaments extruded from the nozzle assembly are molten filaments. The present application effectively improves the heating efficiency, and effectively shortens the preheating time, and the present application can heat filaments flowing through a nozzle assembly into molten filaments more quickly, thereby improving the 3D printing efficiency, and reducing the energy consumption.

Description

A nozzle device and a 3D printer TECHNICAL FIELD

[0001] The present application relates to the field of 3D printing, in particular to a nozzle device and a 3D printer. BACKGROUND

[0002] With the promotion of computer digital technology intelligence, the application field of 3D printing technology is becoming more and more extensive, especially the FDM (Fused Deposition Modeling) technology, which is more and more favored by 3D printing enthusiasts. The traditional 3D printer often uses resistance wire heating method to heat the nozzle assembly. The resistance wire heating method not only has high energy consumption, but also has low heating efficiency and long preheating time, which affects the working efficiency of the 3D printer.

[0003] SUMMARY

[0004] An embodiment of the present application provides a nozzle device, which can heat the nozzle assembly at least by electromagnetic induction heating, thereby improving the heating efficiency and the working efficiency of the 3D printer.

[0005] An embodiment of the present application provides a nozzle device, which comprises:

[0006] a nozzle assembly; and

[0007] a heating assembly connected to the outside of the nozzle assembly and connected to a power supply device;

[0008] The nozzle assembly is configured to transport and extrude the consumables along a first direction.

[0009] The heating assembly is configured to heat the nozzle assembly by electromagnetic induction or by electromagnetic induction and self-heating under the action of the power supply device, so that the consumables extruded by the nozzle assembly are in a molten state.

[0010] An embodiment of the present application provides a 3D printer, which comprises the above-mentioned nozzle device.

[0011] Compared with the prior art, the nozzle device and the 3D printer have the following beneficial features: the nozzle device and the 3D printer comprise a nozzle assembly and a heating assembly, the heating assembly can heat the nozzle assembly by electromagnetic induction heating under the action of the power supply device, or the heating assembly can heat the nozzle assembly by electromagnetic induction heating and self-heating under the action of the power supply device, thereby effectively improving the heating efficiency, effectively shortening the preheating time, and more quickly heating the consumables flowing through the nozzle assembly into a molten state, improving the 3D printing efficiency, and reducing the energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0012] FIG. 1 is a perspective view of a showerhead assembly according to an embodiment of the present application;

[0013] FIG. 2 is an exploded view of the showerhead assembly of FIG. 1;

[0014] FIG. 3 is an exploded view of a heating assembly of the showerhead assembly of FIG. 1;

[0015] FIG. 4 is an exploded view of the heating assembly of the showerhead assembly of FIG. 1;

[0016] FIG. 5 is a view of a coil portion of the heating assembly of FIG. 4;

[0017] FIG. 6 is a perspective view of a showerhead assembly according to an embodiment of the present application;

[0018] FIG. 7 is an exploded view of the showerhead assembly of FIG. 6;

[0019] FIG. 8 is a view of a coil portion of the showerhead assembly of FIG. 6;

[0020] Wherein: 10 - nozzle assembly (11 - throat portion, 12 - nozzle portion), 20 - heating assembly (20a - first heating assembly, 20b - second heating assembly, 21 - coil portion (211 - coil body), 22 - electrical connection portion, 23 - encapsulation portion), 30 - heat conducting assembly (31 - mounting hole). DETAILED DESCRIPTION

[0021] For the purposes of promoting an understanding of the principles of the application, reference will now be made to the embodiments illustrated in the drawings. It is expressly understood that the drawings are for illustration only and that the application can be embodied in many different forms. In addition, any specific reference to the drawings should not be construed as being limiting of the present application.

[0022] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It is to be understood that the terms "approximately" and "substantially" are used herein to represent the inherent degree of uncertainty that can be attributed to any quantitative representation of physical properties, such as, for example, the degree of uncertainty that can be attributed to any quantitative representation of a physical property that is measured by an instrument.

[0023] 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0024] Referring to FIGS. 1-7, the nozzle device of the present application includes a nozzle assembly 10 and a heating assembly 20. The heating assembly 20 can be connected to the nozzle assembly 10 and electrically connected to a power supply device. The nozzle assembly 10 is configured to transport and extrude the consumables in a first direction. The heating assembly 20 is configured to heat the nozzle assembly 10 by electromagnetic induction under the action of the power supply device, so that the extruded consumables of the nozzle assembly 10 are in a molten state. Alternatively, the heating assembly 20 is configured to heat the nozzle assembly 10 by electromagnetic induction and self-heating under the action of the power supply device, so that the extruded consumables of the nozzle assembly 10 are in a molten state.

[0025] The nozzle device of the present application includes a nozzle assembly 10 and a heating assembly 20. The heating assembly 20 can heat the nozzle assembly 10 by electromagnetic induction under the action of the power supply device, or the heating assembly 20 can heat the nozzle assembly 10 by electromagnetic induction and self-heating under the action of the power supply device, effectively improving the heating efficiency, effectively shortening the preheating time, and more quickly heating the consumables flowing through the nozzle assembly 10 into a molten state, thereby improving the 3D printing efficiency and reducing energy consumption.

[0026] In some embodiments, after the heating assembly 20 is powered on, electromagnetic induction can occur between the heating assembly 20 and the nozzle assembly 10, so that the nozzle assembly 10 can quickly heat up, thereby heating the consumables flowing through the nozzle assembly 10. Not only does this improve the heating efficiency, but it also shortens the preheating time, thereby improving the 3D printing efficiency.

[0027] Specifically, the current provided by the power supply device passes through the heating assembly 20, causing the heating assembly 20 to generate a magnetic field. The nozzle assembly 10 generates eddy currents under the action of the magnetic field, which causes the nozzle assembly 10 to quickly heat up and generate heat, thereby heating the consumables flowing through the nozzle assembly 10 to a molten state. This allows the nozzle assembly 10 to extrude molten consumables, thereby improving the heating efficiency, shortening the preheating time, and improving the 3D printing efficiency.

[0028] In some embodiments, after the heating assembly 20 is powered on, electromagnetic induction can occur between the heating assembly 20 and the nozzle assembly 10, so that the nozzle assembly 10 can quickly heat up, thereby heating the consumables flowing through the nozzle assembly 10. At the same time, after the heating assembly 20 is powered on, the heating assembly 20 itself can also heat up and generate heat, thereby heating the nozzle assembly 10 and the consumables flowing through the nozzle assembly 10. In this embodiment, the two heating methods are superimposed, further improving the heating efficiency and thereby further improving the 3D printing efficiency.

[0029] Specifically, the current provided by the power supply device passes through the heating assembly 20, so that the heating assembly 20 generates a magnetic field, the nozzle assembly 10 generates eddy current under the action of the magnetic field, the eddy current makes the nozzle assembly 10 heat rapidly to generate heat, so that the nozzle assembly 10 can extrude the consumable in a molten state. At the same time, when the current provided by the power supply device passes through the heating assembly 20, the current does work and consumes electric energy, so that the heating assembly 20 generates heat to generate heat, the heat generated by the heating assembly 20 is conducted to the nozzle assembly 10, and the nozzle assembly 10 is further heated, so that the consumable passing through the nozzle assembly 10 is further heated, and the two heating modes are superimposed, so that the heating efficiency is further improved, and the 3D printing efficiency is further improved.

[0030] The nozzle assembly 10 can include a throat pipe part 11 and a nozzle part 12, please refer to FIG. 2, FIG. 6 and FIG. 7. The throat pipe part 11 and the nozzle part 12 are connected in sequence along the first direction. The throat pipe part 11 can transport the consumable to the nozzle part 12 along the first direction. The nozzle part 12 can extrude the consumable along the first direction, so as to carry out 3D printing.

[0031] As an example, the throat pipe part 11 and the nozzle part 12 can be threadedly connected into one body, which is simple in structure and convenient to disassemble and assemble.

[0032] It can be understood that the throat pipe part 11 and the nozzle part 12 can be connected and fixed in other ways.

[0033] Optionally, the throat pipe part 11 can be made of magnetic conductive material. The heating assembly 20 can be configured to heat the throat pipe part 11.

[0034] Optionally, the nozzle part 12 can be made of magnetic conductive material. The heating assembly 20 can be configured to heat the nozzle part 12.

[0035] In some embodiments, the throat pipe part 11 is made of magnetic conductive material, and the nozzle part 12 is also made of magnetic conductive material. Accordingly, please refer to FIG. 6 and FIG. 7, the heating assembly 20 can heat both the throat pipe part 11 and the nozzle part 12, effectively prolonging the heating path of the consumable, increasing the extrusion amount of the consumable per unit time, and meeting the printing demand of large flow.

[0036] In some embodiments, the throat pipe part 11 can be made of magnetic conductive material, and the nozzle part 12 can not be made of magnetic conductive material. Accordingly, please refer to FIG. 6 and FIG. 7, the heating assembly 20 can be used to heat the throat pipe part 11, which not only can effectively heat the consumable, but also is simple in structure and convenient to assemble. It can be understood that in this embodiment, the nozzle part 12 can not be heated, or other heating devices can be used to heat the nozzle part 12, which can be set as needed, and will not be described here.

[0037] In some embodiments, the nozzle portion 12 can be made of a magnetic conductive material, and the throat portion 11 can not be made of a magnetic conductive material. Accordingly, the heating assembly 20 can be configured to heat the nozzle portion 12. It can be understood that in the present embodiments, the throat portion 11 can not be heated, or can be heated in other manners, as needed, which will not be described herein.

[0038] As an example, the magnetic conductive material can be iron. Iron is susceptible to magnetic field and can be suitable for electromagnetic induction heating. In the case that the heating assembly 20 generates a magnetic field, the nozzle assembly 10 made of iron generates eddy current under the action of the magnetic field, which makes the nozzle assembly 10 quickly heat up to generate heat, so as to heat the consumable flowing through the nozzle assembly 10 to a molten state, so that the nozzle assembly 10 can extrude the molten consumable.

[0039] It can be understood that the above-mentioned magnetic conductive material can also be other magnetic conductive materials.

[0040] As an optional embodiment, referring to FIGS. 6 and 7, the nozzle device can include two heating assemblies 20, which are respectively connected to the power supply device. The two heating assemblies 20 can be respectively a first heating assembly 20a and a second heating assembly 20b, wherein the first heating assembly 20a can be configured to heat the throat portion 11, and the second heating assembly 20b can be configured to heat the nozzle portion 12, so as to heat the throat portion 11 and the nozzle portion 12 respectively, and the heating speed of the first heating assembly 20a and the second heating assembly 20b can be configured as needed, which is more flexible to use and realizes precise heating.

[0041] As an example, the heating power of the first heating assembly 20a and the heating power of the second heating assembly 20b can be consistent, or the heating power of the first heating assembly 20a and the heating power of the second heating assembly 20b can also be inconsistent.

[0042] As an example, the heating mode of the first heating assembly 20a and the heating mode of the second heating assembly 20b can be consistent, or the heating mode of the first heating assembly 20a and the heating mode of the second heating assembly 20b can also be inconsistent. For example, among the two heating assemblies of the first heating assembly 20a and the second heating assembly 20b, one heating assembly can heat the corresponding components in the nozzle assembly 10 by electromagnetic induction and self-heating, and the other heating assembly can heat the corresponding components in the nozzle assembly 10 by electromagnetic induction. Alternatively, both the first heating assembly 20a and the second heating assembly 20b heat the corresponding components in the nozzle assembly 10 by electromagnetic induction and self-heating. Alternatively, both the first heating assembly 20a and the second heating assembly 20b heat the corresponding components in the nozzle assembly 10 by electromagnetic induction. The present application does not limit the specific combination of the first heating assembly 20a and the second heating assembly 20b, and can be set as needed.

[0043] Optionally, the heating assembly 20 includes a coil portion 21. The coil portion 21 is connected outside the nozzle assembly 10, and the coil portion 21 is connected to the power supply device.

[0044] In some embodiments, the current provided by the power supply device passes through the coil portion 21, so that the coil portion 21 generates a magnetic field, the nozzle assembly 10 generates eddy current under the action of the magnetic field, the eddy current makes the nozzle assembly 10 quickly heat to generate heat, thereby heating the consumables flowing through the nozzle assembly 10 to a molten state, so that the nozzle assembly 10 can extrude the molten state consumables, not only improving the heating efficiency, but also shortening the preheating time, thereby improving the 3D printing efficiency.

[0045] In some embodiments, the current provided by the power supply device passes through the coil portion 21, so that the coil portion 21 generates a magnetic field, the nozzle assembly 10 generates eddy current under the action of the magnetic field, the eddy current makes the nozzle assembly 10 quickly heat to generate heat, thereby heating the consumables flowing through the nozzle assembly 10 to a molten state, so that the nozzle assembly 10 can extrude the molten state consumables. At the same time, in the case that the current provided by the power supply device passes through the coil portion 21, the current does work and consumes electric energy, so that the coil portion 21 heats to generate heat, the heat generated by the heating of the coil portion 21 is conducted to the nozzle assembly 10, and the nozzle assembly 10 is further heated, thereby further heating the consumables flowing through the nozzle assembly 10, the two heating modes are superimposed, further improving the heating efficiency, thereby further improving the 3D printing efficiency.

[0046] In some embodiments, the coil part 21 can be made of nickel-chromium alloy. Nickel-chromium alloy has good electrical conductivity. When the coil part 21 made of nickel-chromium alloy is electrified, the current passing through the coil part 21 will generate a phenomenon of resistance heating, releasing a large amount of heat energy, so that the coil part 21 generates heat. Moreover, when the coil part 21 made of nickel-chromium alloy is electrified, the current passing through the coil part 21 can effectively generate a magnetic field. In addition, nickel-chromium alloy also has excellent high-temperature resistance. In a high-temperature environment, the coil part 21 made of nickel-chromium alloy can withstand higher temperatures without melting. Therefore, when the coil part 21 is made of nickel-chromium alloy, the heating assembly 20 can be configured to heat the nozzle assembly 10 by electromagnetic induction and self-heating.

[0047] In some embodiments, the coil part 21 can be made of copper. Since copper has high electrical conductivity but relatively small resistance, the coil part 21 will not generate a large amount of heat due to self-heating, which helps the coil part 21 to generate a magnetic field more effectively. Therefore, when the coil part 21 is made of copper, the heating assembly 20 can be configured to heat the nozzle assembly 10 by electromagnetic induction.

[0048] Optionally, the coil part 21 can include a layer of coil body 211, as shown in FIG. 3, which not only can effectively heat the nozzle assembly 10, but also has a simple structure, a thinner thickness, and is more conducive to the miniaturization of the nozzle device and the 3D printer.

[0049] Optionally, the coil part 21 can include multiple layers of coil body 211, as shown in FIGS. 4 and 5. The magnetic fields generated by all coil bodies 211 can be in the same direction, thereby effectively enhancing the strength of the magnetic field, so that the nozzle assembly 10 can heat up more quickly and effectively, further improving the heating efficiency. All coil bodies 211 can be arranged at intervals, thereby protecting the coil bodies 211 and improving the service life of the heating assembly 20.

[0050] In some embodiments, the multiple layers of coil body 211 can be connected as a whole, as shown in FIGS. 4 and 5. All coil bodies 211 can be connected end to end in sequence. That is, one heating assembly 20 can be connected to one power supply device, and the heating assembly 20 can be electrically connected to the power supply device through two electrical connection lines. As an example, as shown in FIGS. 3 to 5, the coil part 21 can include two layers of coil body 211, which can be formed by one wire. One end of the wire is connected to the positive electrode of the power supply device through one electrical connection part 22, and the other end of the wire is connected to the negative electrode of the power supply device through another electrical connection part 22. Not only is the structure simple and convenient for wiring, but also the magnetic fields generated by the two layers of coil body 211 are superimposed, which can effectively enhance the strength of the magnetic field, so that the nozzle assembly 10 can heat up more quickly and effectively, further improving the heating efficiency.

[0051] It can be understood that in other embodiments, the multi-layer coil body 211 can also not be connected together. Each layer of coil body 211 can be connected to the power supply device by an electric connection line, thereby realizing individual control of each layer of coil body 211.

[0052] Optionally, the coil body 211 can be in a straight plate structure as shown in FIGS. 3-5, which can reduce the volume of the nozzle device. As an embodiment, in the case where the coil part 21 includes a multi-layer coil body 211, as shown in FIGS. 4 and 5, the straight plate coil body 211 can be arranged in a second direction with a spacing, and the magnetic field directions of all straight plate coil bodies 211 are the same, which not only effectively enhances the strength of the magnetic field, but also facilitates the miniaturization of the 3D printer structure.

[0053] Optionally, the coil body 211 can be in a three-dimensional cylindrical structure as shown in FIG. 8, and the three-dimensional cylindrical coil body 211 can be directly sleeved outside the nozzle assembly 10, which is simple in structure and convenient to install. As an embodiment, in the case where the coil part 21 includes a multi-layer coil body 211, the three-dimensional cylindrical coil body 211 can be sequentially stacked together from the inside to the outside, all three-dimensional cylindrical coil bodies 211 are coaxially arranged, and the magnetic field directions of all three-dimensional cylindrical coil bodies 211 are the same, thereby effectively enhancing the strength of the magnetic field.

[0054] It can be understood that in other embodiments, the coil body 211 can also have other shapes, and the coil body 211 can heat the nozzle assembly 10 by electromagnetic induction, or the coil body 211 can heat the nozzle assembly 10 by electromagnetic induction and self-heating.

[0055] The above-mentioned heating assembly 20 can also include an encapsulation part 23, please refer to FIGS. 1-4, and FIGS. 6 and 7, the encapsulation part 23 is connected to the nozzle assembly 10. The coil part 21 can be embedded in the encapsulation part 23. The encapsulation part 23 can be used to protect the coil part 21. In the case where the heating assembly 20 can heat the nozzle assembly 10 by electromagnetic induction and self-heating, the encapsulation part 23 can also be used to conduct heat, thereby more evenly and efficiently conducting the heat generated by the self-heating of the heating assembly 20 to the nozzle assembly 10, reducing heat loss, and making the nozzle assembly 10 heat more evenly.

[0056] As an example, the encapsulation part 23 can be of ceramic material. The encapsulation part 23 of ceramic material has strong high-temperature resistance, is not easy to melt, is not easy to be eroded by chemicals, and has good wear resistance, long service life, and effectively improves the service life of the heating assembly 20. Moreover, the encapsulation part 23 of ceramic material can effectively protect the coil part 21, further improving the service life of the heating assembly 20.

[0057] It can be understood that in some embodiments, the heating assembly 20 can also not include the encapsulation part 23, which can be set as needed.

[0058] Optionally, referring to FIG. 1 and FIG. 2, the heating assembly 20 can be arranged on one side of the nozzle assembly 10 in the second direction. The heating assembly 20 can not only effectively heat the nozzle assembly 10, but also be more convenient for replacing and maintaining the heating assembly 20. The second direction is perpendicular to the first direction.

[0059] In some embodiments, referring to FIG. 3 and FIG. 4, the coil body 211 can have a straight plate structure. Correspondingly, when the heating assembly 20 includes the packaging portion 23, the packaging portion 23 can also have a straight plate structure. The straight plate coil body 211 can be packaged in the straight plate packaging portion 23, and the coil body 211 and the packaging portion 23 are parallel to the first direction, that is, the heating assembly 20 can be parallel to the first direction. The heating assembly 20 can be connected to one side of the nozzle assembly 10 in the second direction. When the heating assembly 20 needs to be repaired and replaced, the nozzle assembly 10 can not be disassembled, and the heating assembly 20 can be directly disassembled from the nozzle assembly 10, which is more convenient to use and more convenient to maintain.

[0060] Optionally, referring to FIG. 6 and FIG. 7, the heating assembly 20 can be sleeved outside the nozzle assembly 10, and the heating assembly 20 is coaxially arranged with the nozzle assembly 10, which is simple in structure and convenient to install.

[0061] In some embodiments, referring to FIG. 8, the coil body 211 can have a three-dimensional cylindrical structure. Correspondingly, when the heating assembly 20 includes the packaging portion 23, the packaging portion 23 can also have a three-dimensional cylindrical structure. The three-dimensional cylindrical coil body 211 can be packaged in the three-dimensional cylindrical packaging portion 23, and the coil body 211 and the packaging portion 23 can be coaxially arranged with the nozzle assembly 10. That is, the heating assembly 20 can be coaxially arranged with the nozzle assembly 10. When installing, the heating assembly 20 is coaxially sleeved on the nozzle assembly 10, which is simple in structure and convenient to install.

[0062] Optionally, referring to FIG. 1, FIG. 2, FIG. 6 and FIG. 7, the above-mentioned nozzle device can further include a heat conduction assembly 30. The heat conduction assembly 30 is wrapped outside the nozzle assembly 10, and the heat conduction assembly 30 is arranged between the nozzle assembly 10 and the heating assembly 20. After the nozzle assembly 10 generates heat under the action of the magnetic field, the heat can be conducted to the heat conduction assembly 30, and then the nozzle assembly 10 is uniformly heated through the heat conduction assembly 30, thereby further improving the uniformity of the heating of the nozzle assembly 10, so that the consumables are heated more uniformly, and the 3D printing quality is further ensured.

[0063] As an example, in the case that the heating assembly 20 can heat the nozzle assembly 10 by both electromagnetic induction heating and self-heating, when the current provided by the power supply device passes through the heating assembly 20, the current does work and consumes electric energy, so that the heating assembly 20 generates heat by itself, the heat generated by the heating assembly 20 is conducted to the nozzle assembly 10 through the heat conduction assembly 30, and the nozzle assembly 10 is further heated, thereby further ensuring the heating effect.

[0064] Optionally, the heat conduction assembly 30 can be made of copper, so that the heat conduction assembly 30 is not easily affected by the magnetic field and has a high thermal conductivity.

[0065] It can be understood that in other embodiments, the heat conduction assembly 30 can also be made of other materials, and the heat conduction assembly 30 can make the consumables heat more uniformly and improve the 3D printing quality.

[0066] In some embodiments, referring to FIGS. 3 and 4, in the case that the coil body 211 and the packaging portion 23 respectively have a straight plate structure, the heat conduction assembly 30 can be configured as a block structure. The heating assembly 20 can be connected to one side of the heat conduction assembly 30. The heat conduction assembly 30 can be provided with a mounting hole 31 penetrating the heat conduction assembly 30 in a first direction, and the nozzle assembly 10 can be mounted in the mounting hole 31. In this embodiment, the heat conduction assembly 30 can effectively conduct heat, so that the nozzle assembly 10 can heat the consumables more uniformly, and when the heating assembly 20 needs to be repaired or replaced, the nozzle assembly 10 can be directly removed from the heat conduction assembly 30 without disassembly, which is more convenient to use and more conducive to maintenance.

[0067] [Corrected according to Rule 91 on 09.05.2024] In some embodiments, referring to FIGS. 6 to 8, in the case that the coil body 211 and the packaging portion 23 respectively have a three-dimensional cylindrical structure, the heat conduction assembly 30 can be configured as a cylindrical structure. The heat conduction assembly 30 can be coaxially sleeved outside the nozzle assembly 10, and the heating assembly 20 can be coaxially sleeved outside the heat conduction assembly 30. In this embodiment, the heat conduction assembly 30 can effectively conduct heat, so that the nozzle assembly 10 can heat the consumables more uniformly, and the structure is simple and easy to install.

[0068] It can be understood that in other embodiments, the nozzle device can also not include the heat conduction assembly 30, so that the structure of the nozzle device is simpler.

[0069] The 3D printer of the present application embodiment can include any of the above nozzle devices.

[0070] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, as long as the combinations do not conflict with each other, they should be construed to be within the scope of the present disclosure.

[0071] The above embodiments only express the preferred embodiments of the present application, which are described in a more specific and detailed manner, but should not be construed as limiting the scope of the patent application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A showerhead apparatus, comprising: It comprises: a nozzle assembly; and a heating assembly connected outside the nozzle assembly and connected to a power supply device; wherein the nozzle assembly is configured to deliver and extrude a consumable along a first direction; the heating assembly is configured to heat the nozzle assembly by electromagnetic induction or by electromagnetic induction and self-heating under the action of the power supply device, so that the consumable extruded by the nozzle assembly is a molten consumable.

2. The showerhead assembly of claim 1, wherein The nozzle assembly comprises a throat section and a nozzle section connected in sequence along the first direction; The throat section and / or nozzle section are magnetically conductive materials; The heating assembly is configured to heat the throat section and / or the nozzle section.

3. The showerhead assembly of claim 2, wherein, The nozzle device comprises two heating assemblies connected to the power supply device respectively; The two heating assemblies are respectively a first heating assembly and a second heating assembly, wherein the first heating assembly is configured to heat the throat section, and the second heating assembly is configured to heat the nozzle section.

4. The showerhead assembly of claim 1, wherein The heating assembly comprises a coil section; The coil section is connected outside the nozzle assembly and connected to the power supply device.

5. The showerhead assembly of claim 4, wherein, The coil section is made of nickel-chromium alloy material, and the heating assembly is configured to heat the nozzle assembly by electromagnetic induction and self-heating; Or, the coil section is made of copper material, and the heating assembly is configured to heat the nozzle assembly by electromagnetic induction.

6. The showerhead assembly of claim 4, wherein, The coil section comprises one layer of coil body or multiple layers of coil body arranged at intervals, and the multiple layers of coil body generate magnetic fields in the same direction.

7. The showerhead assembly of claim 4, wherein, The heating assembly further comprises a packaging section connected to the nozzle assembly; The coil section is embedded in the packaging section.

8. The showerhead assembly of claim 1, wherein The heating assembly is arranged on one side of the nozzle assembly in a second direction, wherein the second direction is perpendicular to the first direction; Or, the heating assembly is sleeved outside the nozzle assembly, and the heating assembly and the nozzle assembly are coaxially arranged.

9. The showerhead assembly of claim 1, wherein, The nozzle device further comprises a heat conduction assembly; The heat conduction assembly is wrapped outside the nozzle assembly and connected between the nozzle assembly and the heating assembly.

10. A 3D printer characterized by, It comprises the nozzle device as claimed in any one of claims 1 to 9.

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