CN219114806U

CN219114806U - Heating structure of 3D printing equipment insulation bin

Info

Publication number: CN219114806U
Application number: CN202223149861.5U
Authority: CN
Inventors: 招銮; 何德生; 黎佩仪
Original assignee: Jiangsu Yingpu Intelligent Manufacturing Technology Co ltd
Current assignee: Jiangsu Yingpu Intelligent Manufacturing Technology Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-06-02
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a heating structure of a thermal insulation bin of 3D printing equipment, which comprises a thermal insulation bin shell, wherein heating assemblies are arranged on the left inner wall and the right inner wall of the thermal insulation bin shell, each group of heating assemblies comprises at least one carbon fiber heating pipe, and an elastic clamping structure for clamping the carbon fiber heating pipes is arranged on the thermal insulation bin shell. The carbon fiber heating pipe is adopted to heat the forming barrel in the heat preservation bin, and the device has the advantages of stable electrical property, high safety, high thermal efficiency conversion rate and the like, and can realize instantaneous heating through quick response.

Description

Heating structure of 3D printing equipment insulation bin

Technical Field

The utility model relates to the technical field of 3D printing, in particular to a heating structure of a thermal insulation bin of 3D printing equipment.

Background

3D printing is a highly new technology for rapid modeling using fusion techniques, using a powdered bondable material to construct objects in a layer-by-layer printing manner. When the existing 3D printing equipment works, powder is stacked on a workbench layer by layer in a high-temperature environment, and in order to prevent quenching of high-temperature raw materials and local shrinkage and curling deformation of a printed and molded product, a heat preservation device is needed to prevent the product from radiating too fast.

Conventionally, a stainless steel heating pipe is arranged in a thermal insulation bin to perform thermal insulation, however, the stainless steel heating pipe has the following problems: 1. the stainless steel electric heating tube has slow response speed, can not be heated instantaneously, and can lead to the heating structure in the thermal insulation bin to be preheated in advance in the process, thereby consuming energy and electricity. 2. The stainless steel electric heating tube is in fact in a state of poor heat dissipation of the internal heating wire for a long time. The magnesium oxide used for insulation is thus easily dissolved and burns through the electric heating tube, even with the occurrence of an electric leakage accident. 3. The stainless steel structure occupies large space, has more stable positioning holes and is inconvenient to install. 4. The stainless steel electric heating tube has poor heat conductivity coefficient and large heat loss, so that the electric heating efficiency conversion fluctuation is large, and the operation temperature is influenced.

The present utility model has been made based on this situation.

Disclosure of Invention

In view of the above, the utility model aims to provide a heating structure of a thermal insulation bin of a 3D printing device, which has stable performance, high safety, rapid temperature rise and high heat conversion rate.

The utility model adopts the technical proposal for solving the technical problems that:

the utility model provides a heating structure of 3D printing apparatus insulation silo, includes insulation silo casing, and the left side inner wall and the right side inner wall of insulation silo casing all are provided with heating element, and every group heating element includes at least one carbon fiber heating pipe, is provided with the elasticity clamp structure that presss from both sides tight carbon fiber heating pipe on the insulation silo casing.

In a preferred scheme of the utility model, the carbon fiber heating pipe comprises two high-frequency magnetic heads, a glass pipe connected between the two high-frequency magnetic heads, two molybdenum electrodes arranged at two ends of the glass pipe and a carbon fiber heating wire arranged in the glass pipe, wherein two ends of the carbon fiber heating wire are respectively and electrically connected with the two molybdenum electrodes, an insulating sleeve is arranged on the high-frequency magnetic heads, and a lead wire electrically connected with the molybdenum electrodes is arranged in the insulating sleeve in a penetrating way.

In a preferred embodiment of the utility model, a molybdenum wire is connected between the two molybdenum electrodes, and the carbon fiber heating wire is spirally arranged around the molybdenum wire.

In a preferred scheme of the utility model, the inner side wall of the glass tube is provided with a reflecting structure capable of reflecting infrared rays emitted by the carbon fiber heating wire towards the middle part of the inner cavity of the insulation bin shell.

In a preferred embodiment of the utility model, the reflective structure comprises a gold coating disposed on the inside surface of the glass tube.

In a preferred scheme of the utility model, the elastic clamping structure comprises a U-shaped elastic sheet and two arc-shaped elastic clamping pieces, wherein the two arc-shaped elastic clamping pieces are respectively and integrally connected to two ends of the U-shaped elastic sheet, the bottom of the U-shaped elastic sheet is fixedly connected with the insulation bin shell, and the carbon fiber heating pipe is clamped between the two arc-shaped elastic clamping pieces.

In a preferred scheme of the utility model, the U-shaped elastic sheet is connected with the insulation bin shell through a threaded fastener.

The beneficial effects of the utility model are as follows:

1. the carbon fiber heating pipe is adopted to heat the forming barrel in the heat preservation bin, and the device has the advantages of stable electrical property, high safety, high thermal efficiency conversion rate and the like, and can realize instantaneous heating through quick response.

2. The elastic clamping structure is adopted to clamp and mount the carbon fiber heating pipe, so that the carbon fiber heating pipe can be rapidly clamped and mounted, and the assembly working efficiency is improved.

Drawings

FIG. 1 is a perspective view of the utility model as applied to heating a forming drum;

FIG. 2 is a cross-sectional view of the utility model as applied to heating a forming drum;

FIG. 3 is a perspective view of the carbon fiber heating tube clamped by the elastic clamping structure;

FIG. 4 is a schematic cross-sectional view of one end of a carbon fiber heating tube;

FIG. 5 is a cross-sectional view of a glass tube;

FIG. 6 is a schematic diagram of a connection structure between an elastic clamping structure and a carbon fiber heating tube.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear …) in the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the description of "preferred," "less preferred," and the like, herein is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "preferred", "less preferred" may include at least one such feature, either explicitly or implicitly.

Referring to fig. 1 to 6, the utility model provides a heating structure of a thermal insulation bin of 3D printing equipment, which comprises a thermal insulation bin shell 1, wherein heating components are arranged on the left inner wall and the right inner wall of the thermal insulation bin shell 1, each group of heating components comprises at least one carbon fiber heating pipe 2, and an elastic clamping structure for clamping the carbon fiber heating pipes 2 is arranged on the thermal insulation bin shell 1.

Referring to fig. 3 and 4, the carbon fiber heating pipe 2 includes two high frequency magnetic heads 21, a glass pipe 22 connected between the two high frequency magnetic heads 21, two molybdenum electrodes 23 provided at both ends of the glass pipe 22, and a carbon fiber heating wire 24 provided in the glass pipe 22, both ends of the carbon fiber heating wire 24 are electrically connected with the two molybdenum electrodes 23, respectively, an insulating sleeve 25 is provided on the high frequency magnetic heads 21, and a lead wire 26 electrically connected with the molybdenum electrodes 23 is provided in the insulating sleeve 25. The lead 26 is a high temperature resistant wire, and the glass tube 22 is quartz glass.

High frequency magnetic head 21: the photoelectric conversion device is used for converting photoelectric signals and stabilizing voltage.

High temperature resistant wire: the functions are connected by wires at high temperature.

Insulating sleeve 25: for containing high temperature resistant wires and preventing electrical leakage.

Molybdenum electrode 23: is used for conducting current and heating quartz glass.

Quartz tube: has the functions of mechanical support, insulation and isolation and providing a closed vacuum environment.

Carbon fiber heating wire 24: the infrared radiation is generated to heat surrounding objects, and the heat radiation is mainly used, and the heat conduction and the heat convection are assisted.

Referring to fig. 1 and 2, each group of heating assemblies may employ 2, 3 or 4 carbon fiber heating tubes 2, wherein 3 are most preferred, and 3 are taken as an example, the working principle of the utility model is as follows: three carbon fiber heating pipes 2 are fixed on a side plate of a thermal insulation bin of 3D printing equipment by an elastic clamping structure, a forming barrel 4 is arranged in a shell 1 of the thermal insulation bin, two groups of heating components are respectively positioned at the left side and the right side of the forming barrel 4, the characteristic of quick response heating of the carbon fiber heating pipes 2 is utilized, the thermal insulation bin is heated to 100 ℃ rapidly, the thermal insulation can be stably maintained for a long time, and the powder is prevented from deforming due to large-amplitude temperature difference.

The carbon fiber heating pipe 2 is made of pure molybdenum electrode 23 and carbon fiber heating wire 24, and can be heated up to 100 ℃ in 2s rapidly by electrifying. And a high-frequency magnetic head 21 is built in to stably convert photoelectric signals so as to stably output power and convert electric energy into photo-thermal efficiency. The light and heat energy can be stably output under long-time high-temperature work, and the working environment at 100 ℃ is continuously maintained, so that the heat preservation effect is achieved.

Compared with the traditional stainless steel heating pipe, the heating response effect is as follows:

from the above table, it can be seen that: the utility model has the following advantages:

1. the electrical performance is stable. After the infrared heating lamp tube of the carbon fiber is electrified, the infrared heating lamp tube can radiate infrared energy for heating materials. The far infrared radiation heating lamp tube has an infrared radiation wavelength of 1.5-15 μm, and is mainly used for high infrared heating technology to heat the workpiece in a high-density, high-energy and high-intensity radiation mode. The power stabilizing device is suitable for the requirements of high yield and high quality of the modern production process, and the power is stabilized within a certain tolerance range in the frequent starting, closing and long-term continuous working, so that no instant power impact is generated.

2. High heat efficiency. The heating body of the infrared lamp tube is a pure black material, so that the temperature can be quickly increased under the general condition, and the infrared lamp tube has the advantages of small heat lag, uniform heating, long heat radiation transmission distance, high heat exchange speed and the like. The luminous flux is far smaller than that of an electric heating tube of a metal heating body in the working process, the electric heating conversion efficiency is up to more than 98%, the heating speed is extremely high after the power is turned on, the body is burnt in 1-2 seconds, and the surface temperature can reach 300-700 ℃ in 5 seconds.

3. Far infrared and practicality are integrated. The method for emitting the real energy of the carbon fiber infrared heating lamp tube mainly comprises the steps of far infrared radiation, wherein the efficiency of the far infrared radiation can reach more than 80 percent, and the method achieves the best of the prior other far infrared electric heating tubes.

Further, a molybdenum wire 27 is connected between the two molybdenum electrodes 23, and the carbon fiber heating wire 24 is spirally arranged around the molybdenum wire 27. The molybdenum wire 27 has high strength and has a supporting effect on the carbon fiber heating wire 24.

Further, a reflecting structure capable of reflecting infrared rays emitted by the carbon fiber heating wires 24 towards the middle part of the inner cavity of the insulation bin shell 1 is arranged on the inner side wall of the glass tube 22. Preferably the reflective structure comprises a gold coating 28 disposed on the inside surface of the glass tube 22. When the infrared heating pipe works, the gold coating 28 plays a role in reflection, and can reflect infrared rays emitted to the thermal insulation bin shell 1 inwards to the forming barrel 4.

Referring to fig. 6, the elastic clamping structure includes a U-shaped elastic sheet 31 and two arc-shaped elastic clips 32, the two arc-shaped elastic clips 32 are integrally connected to two ends of the U-shaped elastic sheet 31, the bottom of the U-shaped elastic sheet 31 is fixedly connected with the insulation bin housing 1, and the carbon fiber heating tube 2 is clamped between the two arc-shaped elastic clips 32. The U-shaped elastic sheet 31 is connected with the insulation bin shell 1 through threaded fasteners such as screws and bolts, the two arc-shaped elastic clamping pieces 32 are broken off, the high-frequency magnetic head 21 of the carbon fiber heating pipe 2 can be inserted between the two arc-shaped elastic clamping pieces 32, then the arc-shaped elastic clamping pieces 32 are loosened to enable the elasticity of the high-frequency magnetic head 21 of the carbon fiber heating pipe 2 to be recovered, the high-frequency magnetic head 21 of the carbon fiber heating pipe 2 can be clamped, and the installation of the carbon fiber heating pipe 2 is completed when the two high-frequency magnetic heads 21 of the carbon fiber heating pipe 2 are clamped, so that the installation is convenient and quick.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims

1. The utility model provides a heating structure of 3D printing apparatus insulation silo, its characterized in that, including insulation silo casing (1), the left side inner wall and the right side inner wall of insulation silo casing (1) all are provided with heating element, and every group heating element includes at least one carbon fiber heating pipe (2), be provided with the elasticity clamp structure that presss from both sides tight carbon fiber heating pipe (2) on insulation silo casing (1).

2. The heating structure of a thermal insulation warehouse of 3D printing equipment according to claim 1, wherein the carbon fiber heating pipe (2) comprises two high-frequency magnetic heads (21), a glass pipe (22) connected between the two high-frequency magnetic heads (21), two molybdenum electrodes (23) arranged at two ends of the glass pipe (22), and carbon fiber heating wires (24) arranged in the glass pipe (22), two ends of the carbon fiber heating wires (24) are respectively electrically connected with the two molybdenum electrodes (23), an insulating sleeve (25) is arranged on the high-frequency magnetic heads (21), and a lead (26) electrically connected with the molybdenum electrodes (23) is arranged in the insulating sleeve (25) in a penetrating manner.

3. The heating structure of the thermal insulation warehouse of the 3D printing equipment according to claim 2, wherein a molybdenum wire (27) is connected between two molybdenum electrodes (23), and the carbon fiber heating wire (24) is spirally arranged around the molybdenum wire (27).

4. The heating structure of the thermal insulation warehouse of the 3D printing equipment according to claim 2, wherein a reflecting structure capable of reflecting infrared rays emitted by the carbon fiber heating wire (24) towards the middle part of the inner cavity of the thermal insulation warehouse shell (1) is arranged on the inner side wall of the glass tube (22).

5. A heating structure for a thermal insulation cabinet of a 3D printing apparatus according to claim 4, wherein the reflecting structure comprises a gold coating (28) provided on the inner side surface of the glass tube (22).

6. The heating structure of a thermal insulation bin of 3D printing equipment according to claim 1, wherein the elastic clamping structure comprises a U-shaped elastic sheet (31) and two arc-shaped elastic clamping pieces (32), the two arc-shaped elastic clamping pieces (32) are integrally connected to two ends of the U-shaped elastic sheet (31) respectively, the bottom of the U-shaped elastic sheet (31) is fixedly connected with the thermal insulation bin shell (1), and the carbon fiber heating pipe (2) is clamped between the two arc-shaped elastic clamping pieces (32).

7. The heating structure of the thermal insulation bin of the 3D printing equipment according to claim 6, wherein the U-shaped elastic sheet (31) is connected with the thermal insulation bin shell (1) through a threaded fastener.