Electromagnetic heating thawing device

Abstract

The utility model discloses an electromagnetic heating hot melting device, including the electromagnetic coil support, high frequency electromagnetic induction coil is wound on the electromagnetic coil support for producing high frequency alternating magnetic field under the action of high frequency pulse current, nozzle, the nozzle sets up in the magnetic field action area of high frequency electromagnetic induction coil for generating eddy current and spontaneous heating through electromagnetic induction. The utility model discloses adopts electromagnetic induction eddy current heating principle, and the heat is directly generated in the nozzle inside, and does not need traditional heat conduction process, realizes the rapid temperature rise of second level, and the printing preparation time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to a 3D printing head, specifically to an electromagnetic heating and melting device. Background Technology

[0002] Existing 3D printhead heating devices generally use resistance wire / ceramic sheet heating, which results in a long heat transfer path, slow heating speed / long heating time, and low energy utilization efficiency. This poses certain limitations in high-end applications, especially in multi-color printing applications. Frequent switching of printhead devices and slow heating speed severely restrict applications in this field, leading to extremely low efficiency and a poor user experience. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electromagnetic heating and fusion device, which brings revolutionary advantages such as rapid heating, precise temperature control, ultra-high efficiency and excellent reliability by changing the core heating method.

[0004] This utility model of electromagnetic heating and fusion device is achieved through the following technical solutions, including:

[0005] An electromagnetic coil support, on which a high-frequency electromagnetic induction coil is wound to generate a high-frequency alternating magnetic field under the action of a high-frequency pulse current;

[0006] The nozzle is positioned within the magnetic field region of the high-frequency electromagnetic induction coil and is used to generate eddy currents through electromagnetic induction to generate self-heating.

[0007] As a preferred technical solution, it also includes a high-frequency pulse driving device, which is electrically connected to the high-frequency electromagnetic induction coil and provides high-frequency pulse current to the high-frequency electromagnetic induction coil through the high-frequency pulse driving device.

[0008] As a preferred technical solution, the electromagnetic coil support is provided with a U-shaped groove to prevent the high-frequency electromagnetic induction coil from generating eddy currents.

[0009] As a preferred technical solution, the nozzle is made of a metallic magnetic material. When a high-frequency electromagnetic field passes through it, a closed eddy current is generated, thereby achieving self-heating.

[0010] The beneficial effects of this utility model are:

[0011] This invention uses the principle of electromagnetic induction eddy current heating, where heat is generated directly inside the nozzle, eliminating the need for traditional heat conduction processes and achieving rapid heating in seconds, thus significantly shortening print preparation time.

[0012] The energy of this invention acts directly on the heating element, avoiding multiple heat conduction losses in the resistance wire / ceramic sheet heating method, and significantly improving energy utilization efficiency.

[0013] This invention is based on the principle of electromagnetic induction heating, integrating the heat source and sensor, resulting in extremely sensitive temperature response. It can achieve high-precision, high-dynamic-response temperature control, thereby improving print quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0016] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the electromagnetic coil support structure of this utility model.

[0018] Explanation of reference numerals in the attached figures

[0019] 1. Electromagnetic coil support; 2. High-frequency electromagnetic induction coil; 3. Nozzle; 4. U-shaped groove. Detailed Implementation

[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] like Figures 1-3 As shown in the specific embodiment of this utility model, an electromagnetic heating and melting device includes an electromagnetic coil support 1, a high-frequency electromagnetic induction coil 2, a nozzle 3, and a high-frequency pulse driving device that works in conjunction with it. The electromagnetic coil support 1, as the main load-bearing component of the device, is made entirely of insulating or low-conductivity material and is used to support and fix the high-frequency electromagnetic induction coil 2, enabling it to operate stably. To prevent the high-frequency electromagnetic induction coil 2 from forming a loop on the surface of the electromagnetic coil support 1 when current is applied, thus preventing the formation of additional eddy currents, a U-shaped groove 4 is provided on the electromagnetic coil support 1. The U-shaped groove 4 structurally cuts off the closed path, thereby weakening or avoiding unnecessary electromagnetic losses and concentrating energy on the nozzle 3.

[0022] A high-frequency electromagnetic induction coil 2 is wound around the outer periphery of the electromagnetic coil support 1, and generates a high-frequency alternating magnetic field in space after being energized. A high-frequency pulse drive device is electrically connected to the high-frequency electromagnetic induction coil 2 and can provide a high-frequency pulse current to the high-frequency electromagnetic induction coil 2. The high-frequency pulse drive device includes a power control module and a frequency adjustment module, which are used to control the amplitude and frequency of the output current according to actual needs, thereby indirectly realizing the heating speed and temperature adjustment of the nozzle 3.

[0023] Nozzle 3 is positioned within the magnetic field area formed by the high-frequency electromagnetic induction coil 2, and its main body is made of a metallic magnetic material. When the high-frequency alternating magnetic field acts on nozzle 3, closed eddy currents are induced in its internal metal body. These eddy currents generate Joule heating due to the metal's resistance as they flow, allowing nozzle 3 to heat up directly. Furthermore, the high-frequency alternating magnetic field causes the magnetic domains inside nozzle 3 to continuously rotate, and the friction between these domains also generates additional heat. The combined effect of these two factors allows nozzle 3 to heat up in a very short time, significantly reducing the heating preparation time.

[0024] The relative position between the nozzle 3 and the high-frequency electromagnetic induction coil 2 can be adjusted. By adjusting the depth of the nozzle 3's insertion into the magnetic field region, the intensity and distribution of the eddy currents can be effectively changed, thereby flexibly controlling the heating intensity and efficiency of the nozzle 3 to adapt to different printing materials and process requirements. In a further embodiment, the device may also include a temperature detection module, which can be directly installed on or near the nozzle 3 to monitor the surface temperature of the nozzle 3 in real time and feed the temperature signal back to the high-frequency pulse drive device, thereby achieving closed-loop control. Simultaneously, to adapt to the rapid switching requirements of multi-nozzle or multi-color printing, the device can also be equipped with a cooling unit. When the nozzle 3 stops heating, the cooling unit can quickly reduce the temperature of the nozzle 3, thereby avoiding prolonged high-temperature exposure that could affect subsequent work.

[0025] In practical use, when the high-frequency pulse drive device applies a high-frequency pulse current to the high-frequency electromagnetic induction coil 2, the electromagnetic induction coil 2 forms a stable high-frequency alternating magnetic field under the support of the electromagnetic coil bracket 1, and this magnetic field directly acts on the nozzle 3.

[0026] Because nozzle 3 is made of a metallic magnetic material, eddy currents are generated within it, forming a heating zone. Heat is generated directly within nozzle 3, bypassing traditional heat conduction paths, thus achieving rapid heating within seconds. The power control module and frequency adjustment module of the high-frequency pulse drive device can adjust the current amplitude and frequency based on real-time temperature feedback from nozzle 3, achieving precise temperature control. The U-shaped groove 4 on the electromagnetic coil support 1 weakens unnecessary eddy currents during this process, further improving the overall efficiency of the device.

[0027] Therefore, this electromagnetic heating and melting device achieves rapid heating and precise temperature control of the nozzle 3 by winding a high-frequency electromagnetic induction coil 2 on the electromagnetic coil support 1 and directly heating the nozzle 3 under the action of a magnetic field. This avoids the energy loss and heating delay caused by the long heat conduction path in traditional resistance wire or ceramic sheet heating methods, thereby effectively improving the efficiency and printing quality of 3D printing equipment.

[0028] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. An electromagnetic heating and melting device, characterized in that, include: An electromagnetic coil support (1) is provided, on which a high-frequency electromagnetic induction coil (2) is wound to generate a high-frequency alternating magnetic field under the action of a high-frequency pulse current. The nozzle (3) is located within the magnetic field area of ​​the high-frequency electromagnetic induction coil (2). It generates eddy currents through electromagnetic induction and self-heats inside the nozzle (3) to achieve heating and melting.

2. The electromagnetic heating and melting device according to claim 1, characterized in that, It also includes a high-frequency pulse driving device, which is electrically connected to the high-frequency electromagnetic induction coil (2) and is used to provide high-frequency pulse current to the high-frequency electromagnetic induction coil (2).

3. The electromagnetic heating and melting device according to claim 1 or 2, characterized in that, The electromagnetic coil support (1) is provided with a U-shaped groove (4), which is used to weaken or prevent the high-frequency electromagnetic induction coil (2) from generating eddy currents during operation.

4. The electromagnetic heating and melting device according to claim 1, characterized in that, The nozzle (3) is made of metallic magnetic material. When the high-frequency alternating magnetic field generated by the high-frequency electromagnetic induction coil (2) acts on the nozzle (3), a closed eddy current is formed inside the nozzle (3) to achieve self-heating.

5. The electromagnetic heating and melting device according to claim 1, characterized in that, The relative position of the nozzle (3) and the high-frequency electromagnetic induction coil (2) is adjustable to change the heating intensity and heating efficiency of the nozzle (3) in the magnetic field region.

6. The electromagnetic heating and melting device according to claim 2, characterized in that, The high-frequency pulse drive device includes a power control module and a frequency adjustment module, which are used to adjust the current amplitude and frequency supplied to the high-frequency electromagnetic induction coil (2), thereby controlling the heating rate and target temperature of the nozzle (3).

7. The electromagnetic heating and melting device according to claim 1, characterized in that, The electromagnetic coil support (1) is made of insulating material or low conductivity material to reduce the electromagnetic loss of the support itself.

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