Novel graphene heating nozzle

Abstract

The invention discloses a novel graphene heating nozzle, and relates to the technical field of 3D printing, the novel graphene heating nozzle comprises a nozzle body, the surface of an inner cavity of the nozzle body is sprayed with a high-temperature-resistant insulating coating, and the outer wall of the high-temperature-resistant insulating coating is sprayed with a graphene heating coating; the characteristics of high conductivity, low thermal resistance and high thermal conductivity of graphene are utilized, a self-heating system is formed, the heating and melting speed of a printing material is remarkably increased, and therefore the overall printing efficiency is improved; the problems that a traditional passive heat transfer heating mode is low in heating speed, melting is not sufficient, and breaking is caused are solved; the graphene heating coating has the characteristics of high temperature resistance and friction resistance, and the service life is long; the heating efficiency of excited radiation of the graphene heating coating is higher along with temperature rise, the graphene heating coating can penetrate through the interior of a printing material, the melting speed of the material is increased, the discharging speed is greatly increased, preheating is not needed, instant heating is achieved after electrification, the temperature rise speed is high, and the time cost and the material cost are saved.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printing, in particular to a novel graphene heating nozzle. Background Art

[0002] 3D printing, also known as additive manufacturing or layered manufacturing, is a technology that uses digital model files as the basis, uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. The technology was first proposed by the United States in the mid-1980s. 3D printing is often used to make models in the fields of mold manufacturing and industrial design, and later gradually used for the direct manufacturing of some products. It has a profound impact on traditional process flows, production lines, factory models, and industrial chain combinations, and is a representative disruptive technology in the manufacturing industry.

[0003] During the printing process, the material needs to be ejected from the nozzle. The nozzles of current 3D printers on the market are heated by passive heat conduction, that is, the module wrapping the nozzle is heated first (usually a metal module with large heat capacity and long preheating time), and then the heat is conducted to the nozzle. The nozzle transfers heat from the outside to the inside, and then the inner cavity wall conducts the heat to the printing material. The heat is conducted multiple times, the thermal resistance is large, the heat conversion efficiency is low, and the printing speed is limited. Summary of the invention

[0004] In order to solve the defects in the prior art, the present invention provides a novel graphene heating nozzle.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The invention discloses a novel graphene heating nozzle, comprising a nozzle, wherein an inner cavity surface of the nozzle is sprayed with a layer of high-temperature resistant insulating coating, and an outer wall of the high-temperature resistant insulating coating is sprayed with a layer of graphene heating coating.

[0007] As a preferred technical solution of the present invention, the thickness of the high temperature resistant insulating coating is set in the range of 5-8um.

[0008] As a preferred technical solution of the present invention, the thickness range of the graphene heating coating is set in the range of 8-30um.

[0009] As a preferred technical solution of the present invention, a welding pad is provided on the outer wall of the nozzle, and an external threaded connection portion is provided on the outer wall of the welding pad.

[0010] A method for preparing a novel graphene heating nozzle includes the novel graphene heating nozzle described above. The preparation steps of the graphene heating nozzle are as follows:

[0011] Step 1: Spray the high temperature resistant insulating coating on the inner surface of the nozzle cavity, leaving a position for the electrode;

[0012] Step 2, baking the sprayed high temperature resistant insulating coating to dry and solidify;

[0013] Step 3, spraying the graphene heating coating with the prepared formula on the outer surface of the high temperature resistant insulating coating;

[0014] Step 4, baking the sprayed graphene heating coating to dry and solidify;

[0015] Step 5: Solder the pad on the nozzle;

[0016] Step 6: Turn on the power to inspect the quality of the graphene heating nozzle.

[0017] As a preferred technical solution of the present invention, the high temperature resistant insulating coating is sprayed using a high-precision and high-pressure fine-head spray gun (Φ<1mm).

[0018] As a preferred technical solution of the present invention, the high temperature resistant insulating coating can withstand a high temperature of 300°C.

[0019] As a preferred technical solution of the present invention, the baking temperature of the high temperature resistant insulating coating is set to 120°C.

[0020] As a preferred technical solution of the present invention, the baking temperature of the graphene heating coating is set to 150°C.

[0021] The beneficial effects of the present invention are:

[0022] 1. This new type of graphene heating nozzle has a layer of high-temperature resistant insulating coating sprayed on the inner cavity surface of the nozzle, and a layer of graphene heating coating sprayed on the outer wall of the high-temperature resistant insulating coating. The high conductivity, low thermal resistance and high thermal conductivity of graphene are used to form a self-heating system, which significantly improves the heating and melting speed of the printed material, thereby improving the overall printing efficiency; it solves the problem of slow heating speed and insufficient melting leading to interruption in the traditional passive heat transfer heating method; the graphene heating coating has both high temperature resistance and friction resistance and a long service life; as the temperature of the graphene heating coating rises, the radiation heating efficiency stimulated by the graphene heating coating becomes stronger, which can penetrate the inside of the printed material, accelerate the melting speed of the material, and greatly improve the discharge speed. No preheating is required, it heats up as soon as the power is turned on, and the heating speed is fast, saving time and material costs.

[0023] 2. This new type of graphene heating nozzle first sprays a layer of high-temperature resistant insulating coating 2 (resistant to high temperature of 300°C) with a thickness of 5 to 8 um on the inner surface of the nozzle 1 through a high-precision high-pressure fine-head spray gun (Φ<1mm), reserves the electrode position, and after drying and curing at 120°C, sprays the graphene heating coating with a prepared formula on the surface of the high-temperature resistant insulating coating 2. The coating thickness can be determined according to the heating power (i.e., the resistance value is adjusted), generally controlled within the range of 8 to 30 um, and cured by baking at 150°C. The electrode power connection adopts the pad contact method, which is convenient for disassembly and assembly, and is convenient for manufacturing the new type of graphene heating nozzle, and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the main structure of a novel graphene heating nozzle of the present invention;

[0026] Figure 2 It is a structural cross-sectional view of a novel graphene heating nozzle of the present invention;

[0027] Figure 3 This is a new type of graphene heating nozzle of the present invention. Figure 2 Enlarged structural cross-sectional view at point A in the middle.

[0028] In the figure: 1. Nozzle; 2. High temperature resistant insulating coating; 3. Graphene heating coating; 4. Soldering pad. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] Example: Figure 1 , Figure 2 and Figure 3As shown, a novel graphene heating nozzle of the present invention comprises a nozzle 1, wherein the inner cavity surface of the nozzle 1 is sprayed with a layer of high temperature resistant insulating coating 2, and the outer wall of the high temperature resistant insulating coating 2 is sprayed with a layer of graphene heating coating 3. By spraying a layer of high temperature resistant insulating coating 2 on the inner cavity surface of the nozzle 1, and spraying a layer of graphene heating coating 3 on the outer wall of the high temperature resistant insulating coating 2, a self-heating system is formed by utilizing the high electrical conductivity, low thermal resistance and high thermal conductivity characteristics of graphene, which significantly improves the heating and melting speed of the printing material, thereby improving the overall printing efficiency; it solves the problem of traditional passive heat transfer heating. The thermal method has a slow heating speed and insufficient melting, resulting in printing interruption; the graphene heating coating 3 has both high temperature resistance and friction resistance, and has a long service life; as the temperature of the graphene heating coating 3 rises, the radiation heating efficiency it stimulates becomes stronger (radiation heating principle: converting heat into mid-infrared light waves, which can penetrate 1-2mm low-density (non-metal) materials and convert heat into internal energy of the material), which can penetrate the inside of the printing material, accelerate the melting speed of the material, and greatly improve the discharge speed. No preheating is required, it heats up as soon as the power is turned on, and the heating speed is fast, saving time and material costs.

[0031] Wherein, the thickness of the high temperature resistant insulating coating 2 is set in the range of 5-8um.

[0032] Wherein, the thickness range of the graphene heating coating 3 is set in the range of 8-30um.

[0033] The outer wall of the nozzle 1 is provided with a welding pad 4, and the outer wall of the welding pad 4 is provided with an external threaded connection portion for easy installation and disassembly.

[0034] When working, the new type of graphene heating nozzle 1 is sprayed with a layer of high-temperature resistant insulating coating 2 on the inner cavity surface of the nozzle 1, and a layer of graphene heating coating 3 is sprayed on the outer wall of the high-temperature resistant insulating coating 2. The high conductivity, low thermal resistance and high thermal conductivity of graphene are used to form a self-heating system, which significantly improves the heating and melting speed of the printed material, thereby improving the overall printing efficiency; it solves the problem that the traditional passive heat transfer heating method has slow heating speed and insufficient melting resulting in interruption; the graphene heating coating 3 has both high temperature resistance and friction resistance and a long service life; as the temperature of the graphene heating coating 3 rises, the stronger the radiation heating efficiency stimulated by the graphene heating coating 3 (radiation heating principle: converting heat into mid-infrared light waves, which can penetrate 1-2mm low-density (non-metallic) materials and convert heat into internal energy of the material), can penetrate the inside of the printed material, accelerate the melting speed of the material, greatly improve the discharge speed, no preheating is required, it heats up as soon as the power is turned on, and the heating speed is fast, saving time and material costs.

[0035] A method for preparing a novel graphene heating nozzle includes the novel graphene heating nozzle described above. The preparation steps of the graphene heating nozzle are as follows:

[0036] Step 1, spray the high temperature resistant insulating coating 2 on the inner cavity surface of the nozzle, and reserve the electrode position;

[0037] Step 2, baking the sprayed high temperature resistant insulating coating 2 to dry and solidify;

[0038] Step 3, spraying the graphene heating coating 3 with the prepared formula on the outer surface of the high temperature resistant insulating coating;

[0039] Step 4, baking the sprayed graphene heating coating 3 to dry and solidify;

[0040] Step 5, welding the pad 4 on the nozzle 1;

[0041] Step 6: Power on to test the quality of the graphene heating nozzle

[0042] The high temperature resistant insulating coating 2 is sprayed with a high precision and high pressure fine head spray gun (Φ<1mm).

[0043] The high temperature resistant insulating coating 2 can withstand a high temperature of 300°C.

[0044] Wherein, the baking temperature of the high temperature resistant insulating coating 2 is set to 120°C.

[0045] Wherein, the baking temperature of the graphene heating coating 3 is set to 150°C.

[0046] During operation, a layer of high-temperature resistant insulating coating 2 (resistant to high temperature of 300°C) with a thickness of 5 to 8 um is first sprayed on the inner surface of the nozzle 1 through a high-precision high-pressure fine-head spray gun (Φ<1mm), and the electrode position is reserved. After being dried and cured at 120°C, the graphene heating coating with a prepared formula is sprayed on the surface of the high-temperature resistant insulating coating 2. The coating thickness can be determined according to the heating power (i.e., the resistance value is adjusted), generally controlled within the range of 8 to 30 um, and cured by baking at 150°C. The electrode is connected to the solder pad contact method, which is convenient for disassembly and assembly, and is convenient for manufacturing the new graphene heating nozzle, and the manufacturing cost is low.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel graphene heating nozzle, comprising a nozzle (1), characterized in that: A layer of high-temperature resistant insulating coating (2) is sprayed on the inner cavity surface of the nozzle (1), and a layer of graphene heating coating (3) is sprayed on the outer wall of the high-temperature resistant insulating coating (2).

2. A novel graphene heating nozzle according to claim 1, characterized in that: The thickness of the high temperature resistant insulating coating (2) is set in the range of 5-8 um.

3. A novel graphene heating nozzle according to claim 1, characterized in that: The thickness of the graphene heating coating (3) is set in the range of 8-30 um.

4. A novel graphene heating nozzle according to claim 1, characterized in that: The outer wall of the nozzle (1) is provided with a welding pad (4), and the outer wall of the welding pad (4) is provided with an external threaded connection portion.

5. A method for preparing a novel graphene heating nozzle, comprising a novel graphene heating nozzle as claimed in any one of claims 1 to 4, characterized in that: The preparation steps of the graphene heating nozzle are: Step 1, spraying a high temperature resistant insulating coating (2) on the inner cavity surface of the nozzle (1), leaving a position for the electrode; Step 2, baking the sprayed high temperature resistant insulating coating (2) to dry and solidify; Step 3, spraying the graphene heating coating (3) with the prepared formula onto the outer surface of the high temperature resistant insulating coating (2); Step 4, baking the sprayed graphene heating coating (3) to dry and solidify; Step 5, welding the pad on the nozzle (1); Step 6: Turn on the power to inspect the quality of the graphene heating nozzle.

6. The method for preparing a novel graphene heating nozzle according to claim 5, characterized in that: The high temperature resistant insulating coating (2) is sprayed using a high precision and high pressure fine head spray gun (Φ<1 mm).

7. The method for preparing a novel graphene heating nozzle according to claim 5, characterized in that: The high temperature resistant insulating coating (2) can withstand a high temperature of 300°C.

8. The method for preparing a novel graphene heating nozzle according to claim 5, characterized in that: The baking temperature of the high temperature resistant insulating coating (2) is set to 120°C.

9. The method for preparing a novel graphene heating nozzle according to claim 5, characterized in that: The baking temperature of the graphene heating coating (3) is set to 150°C.

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