A kind of inverted flux nozzle for 3D printer

Abstract

The utility model relates to an inverted fluxing nozzle for a 3D printer, the inverted fluxing nozzle comprises a nozzle body, a preheating tube and a fluxing part, a flow channel is arranged in the nozzle body along its axial direction, the preheating tube is connected and sleeved in the upper part of the flow channel, the fluxing part is located in the flow channel and below the preheating tube; the fluxing part comprises an integrally formed fluxing plate and a fluxing tube, the fluxing plate is embedded in the upper part of the flow channel and is provided with a hollow area, the upper end of the fluxing tube is connected to the fluxing plate and is arranged along the axial direction of the flow channel, and a gap is formed between the lateral outer wall of the fluxing tube and the lateral inner wall of the flow channel. The purpose of the utility model is to solve or at least alleviate the problem that the consumables cannot be fully melted in the nozzle when improving the extrusion efficiency of the 3D printer nozzle, and to provide an inverted fluxing nozzle for a 3D printer.

Description

Technical Field

[0001] The utility model belongs to the technical field of 3D printers, and in particular relates to an inverted fluxing nozzle for a 3D printer. Background Art

[0002] 3D printing does not make parts by subtracting materials like traditional machining, but by adding materials. Parts are made using a 3D printer based on a digital model. The 3D printer melts the consumables and extrude them from the printer nozzle. After the melted consumables leave the printer nozzle, they become solid, thus achieving 3D printing of parts.

[0003] The filament enters from the larger inlet hole at the top of the nozzle, is heated and melted in the nozzle connected to an external heat source, and then extruded from the smaller outlet hole at the end of the nozzle.

[0004] In order to shorten the printing time and improve the printing efficiency, the extrusion efficiency of the outlet hole at the end of the nozzle will be improved. However, the consumables cannot be fully melted in the nozzle, which reduces the extrusion efficiency and affects the printing quality, thus limiting the printing speed of the 3D printer.

[0005] In order to fully melt the filament in the nozzle, some designs add a fluxing part in the middle of the nozzle. However, the fluxing part is mostly installed from the bottom of the nozzle, which is not only inconvenient to install from bottom to top, but also its bottom installation structure will block the extrusion of the melted filament. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art, solve or at least alleviate the problem that the consumables cannot be fully melted in the nozzle when improving the extrusion efficiency of the 3D printer nozzle, and provide an inverted flux nozzle for a 3D printer.

[0007] The utility model is realized by the following technical solutions:

[0008] An inverted fluxing nozzle for a 3D printer, the inverted fluxing nozzle comprising a nozzle body, a preheating tube and a fluxing portion, a flow channel is arranged in the nozzle body along its axial direction, the preheating tube is connected and sleeved in the upper part of the flow channel, and the fluxing portion is located in the flow channel and below the preheating tube;

[0009] The fluxing part includes an integrally formed fluxing plate and a fluxing tube. The fluxing plate is embedded in the upper part of the circulation channel and is provided with a hollow area. The upper end of the fluxing tube is connected to the fluxing plate and is arranged axially along the circulation channel. A gap is formed between the lateral outer wall of the fluxing tube and the lateral inner wall of the circulation channel.

[0010] In order to further realize the utility model, the following technical solutions can be preferably selected:

[0011] Preferably, the nozzle body comprises an upper nozzle pipe, a lower nozzle pipe and a nozzle arranged in sequence from top to bottom, and the lower portion of the upper nozzle pipe and the upper portion of the nozzle head are respectively fitted on the upper portion and the lower portion of the lower nozzle pipe.

[0012] Preferably, a positioning hole and a locking hole are sequentially arranged at the upper end of the flow channel of the nozzle body from bottom to top;

[0013] The inner diameter of the positioning hole is greater than the inner diameter of the flow channel and equal to the outer diameter of the flux plate, and the height of the positioning hole is not less than the thickness of the flux plate;

[0014] The inner diameter of the locking hole is greater than the inner diameter of the positioning hole and is equal to the outer diameter of the lower part of the preheating tube.

[0015] Preferably, the fluxing plate of the fluxing part includes an integrally formed connecting tube, a positioning ring and a ridge plate, the positioning ring is coaxially arranged on the outside of the connecting tube, the upper end of the fluxing tube is connected to the lower end of the connecting tube, the ridge plate is arranged between the connecting tube and the positioning ring, the inner and outer sides of the ridge plate are respectively connected to the outer wall of the connecting tube and the inner wall of the positioning ring, and a plurality of ridge plates are arranged along the outer wall of the connecting tube.

[0016] Preferably, the upper and lower parts of the flux tube are both in the shape of a truncated cone with a small outer side and a large inner side, and the outer diameter of the upper end of the flux tube is equal to the outer diameter of the connecting tube.

[0017] Preferably, the cross-section of the upper end of the prism plate is ∧-shaped.

[0018] Through the above technical solution, the beneficial effects of the utility model are:

[0019] The nozzle body of the utility model is provided with a preheating tube, and the consumables are preliminarily melted in the preheating tube before entering the nozzle body. A fluxing portion is provided in the circulation channel of the nozzle body, and the preliminarily melted consumables enter the slit between the fluxing portion and the circulation channel, so that the consumables are changed from a solid column to a hollow column, and the outer diameter is increased, and the contact area with the nozzle body is increased, thereby improving the heat conductivity between the nozzle body and the consumables and improving the melting efficiency. The fluxing portion can also be thermally connected to the nozzle body, so that the hollow columnar consumables are heated inside and outside at the same time, further improving the melting efficiency, and ensuring that the consumables are efficiently and quickly melted in the nozzle.

[0020] The fluxing part of the utility model is installed from top to bottom, which is convenient for installation; the fluxing plate used for installation and positioning is located at the upper part of the circulation channel, and when the initially melted consumables in the preheating tube pass through the fluxing plate, the melted consumables and the unmelted consumables can be separated, and the melted consumables enter the slit between the fluxing part and the circulation channel and are extruded from the lower end of the nozzle body, and the unmelted consumables enter the fluxing tube, which heats the unmelted consumables separately and further melts them quickly, thereby further improving the melting efficiency of the consumables in the nozzle, improving the extrusion efficiency of the consumables, and improving the printing speed while ensuring the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural sectional view of the utility model;

[0022] Figure 2 For the utility model Figure 1 Sectional view at AA in the middle;

[0023] Figure 3 It is a structural cross-sectional view of the nozzle body of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the fluxing part of the utility model;

[0025] Among them: 1-nozzle body; 2-preheating tube; 3-fluxing part; 4-circulation channel; 5-positioning hole; 6-locking hole; 101-upper nozzle; 102-lower nozzle; 103-nozzle; 301-fluxing plate; 302-fluxing tube; 3011-connecting tube; 3012-positioning ring; 3013-edge plate. DETAILED DESCRIPTION

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0028] like Figure 1-Figure 4 As shown, an inverted fluxing nozzle for a 3D printer comprises a nozzle body 1, a preheating tube 2 and a fluxing portion 3. A flow channel 4 is arranged in the nozzle body 1 along its axial direction. The preheating tube 2 is connected and sleeved in the upper part of the flow channel 4. The fluxing portion 3 is coaxially arranged in the flow channel 4 and is located below the preheating tube 2.

[0029] The fluxing part 3 includes an integrally formed fluxing plate 301 and a fluxing tube 302. The fluxing plate 301 is in the shape of a circular flat plate. The fluxing plate 301 is embedded in the upper part of the circulation channel 4 and is provided with a hollow area. The upper end of the fluxing tube 302 is connected to the fluxing plate 301 and is coaxially arranged with the fluxing plate 301 along the axial direction of the circulation channel 4. A gap is formed between the lateral outer wall of the fluxing tube 302 and the lateral inner wall of the circulation channel 4.

[0030] In order to facilitate the ejection of the fluxing portion 3 from the flow channel 4 from below during disassembly, the nozzle body 1 includes an upper nozzle pipe 101, a lower nozzle pipe 102 and a nozzle head 103 arranged in sequence from top to bottom, and the lower part of the upper nozzle pipe 101 and the upper part of the nozzle head 103 are respectively fitted on the upper part and the lower part of the lower nozzle pipe 102.

[0031] In order to facilitate the positioning of the fluxing portion 3, a positioning hole 5 and a locking hole 6 are sequentially arranged at the upper end of the flow channel 4 of the nozzle body 1 from bottom to top;

[0032] The inner diameter of the positioning hole 5 is greater than the inner diameter of the flow channel 4 and equal to the outer diameter of the flux plate 301 , and the height of the positioning hole 5 is not less than the thickness of the flux plate 301 ;

[0033] The inner diameter of the locking hole 6 is greater than the inner diameter of the positioning hole 5 and is equal to the outer diameter of the lower portion of the preheating tube 2 .

[0034] In order to optimize the product structure, in this embodiment, the fluxing plate 301 of the fluxing part 3 includes an integrally formed connecting tube 3011, a positioning ring 3012 and a prism 3013. The positioning ring 3012 is coaxially arranged on the outside of the connecting tube 3011. The upper end of the fluxing tube 302 is connected to the lower end of the connecting tube 3011. The prism 3013 is arranged between the connecting tube 3011 and the positioning ring 3012. The inner and outer sides of the prism 3013 are respectively connected to the outer wall of the connecting tube 3011 and the inner wall of the positioning ring 3012. A plurality of prisms 3013 are evenly distributed along the outer wall of the connecting tube 3011.

[0035] In order to make the melted consumables flow more smoothly, in this embodiment, the upper and lower parts of the flux tube 302 are both in the shape of a truncated cone with a small outer side and a large inner side, and the outer diameter of the upper end of the flux tube 302 is equal to the outer diameter of the connecting tube 3011.

[0036] In order to more quickly peel off the melted consumables, the cross-section of the upper end of the edge plate 3013 is ∧-shaped.

[0037] The nozzle body 1 of the utility model is provided with a preheating tube 2. The consumable is preliminarily melted in the preheating tube 2 before entering the nozzle body 1. A fluxing portion 3 is provided in the circulation channel 4 of the nozzle body 1. The preliminarily melted consumable enters the slit between the fluxing portion 3 and the circulation channel 4, so that the consumable is changed from a solid column to a hollow column, and the outer diameter is increased, and the contact area with the nozzle body 1 is increased, thereby improving the heat conduction between the nozzle body 1 and the consumable, and improving the melting efficiency. The fluxing portion 3 can also be thermally connected to the nozzle body 1, so that the hollow columnar consumable is heated inside and outside at the same time, further improving the melting efficiency, and ensuring that the consumable is efficiently and quickly melted in the nozzle.

[0038] The fluxing portion 3 of the utility model is installed from top to bottom, which is convenient for installation; the fluxing plate 301 used for installation and positioning is located at the upper part of the circulation channel 4, and when the initially melted consumables in the preheating tube 2 pass through the fluxing plate 301, the melted consumables and the unmelted consumables can be separated, and the melted consumables enter the slit between the fluxing portion 3 and the circulation channel 4 and are extruded from the lower end of the nozzle body 1, and the unmelted consumables enter the fluxing tube 302, and the unmelted consumables are heated separately by the fluxing tube 302 to further melt quickly, thereby further improving the melting efficiency of the consumables in the nozzle, improving the extrusion efficiency of the consumables, and improving the printing speed while ensuring the printing quality.

[0039] Finally, it should be noted that the above are only preferred embodiments of the present invention and are 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 make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An inverted flux nozzle for a 3D printer, characterized in that: The inverted fluxing nozzle comprises a nozzle body (1), a preheating tube (2) and a fluxing portion (3); a circulation channel (4) is arranged in the nozzle body (1) along its axial direction; the preheating tube (2) is connected and sleeved in the upper part of the circulation channel (4); and the fluxing portion (3) is located in the circulation channel (4) and below the preheating tube (2); The fluxing portion (3) comprises an integrally formed fluxing plate (301) and a fluxing tube (302); the fluxing plate (301) is embedded in the upper part of the circulation channel (4) and is provided with a hollow area; the upper end of the fluxing tube (302) is connected to the fluxing plate (301) and is arranged axially along the circulation channel (4); a gap is formed between the lateral outer wall of the fluxing tube (302) and the lateral inner wall of the circulation channel (4).

2. The inverted flux nozzle for a 3D printer according to claim 1, characterized in that: The nozzle body (1) comprises an upper nozzle pipe (101), a lower nozzle pipe (102) and a nozzle head (103) which are arranged in sequence from top to bottom, and the lower part of the upper nozzle pipe (101) and the upper part of the nozzle head (103) are respectively sleeved on the upper part and the lower part of the lower nozzle pipe (102).

3. The inverted fluxing nozzle for a 3D printer according to claim 1, characterized in that: The upper end of the flow channel (4) of the nozzle body (1) is provided with a positioning hole (5) and a locking hole (6) in sequence from bottom to top; The inner diameter of the positioning hole (5) is greater than the inner diameter of the circulation channel (4) and equal to the outer diameter of the fluxing plate (301), and the height of the positioning hole (5) is not less than the thickness of the fluxing plate (301); The inner diameter of the locking hole (6) is greater than the inner diameter of the positioning hole (5) and is equal to the outer diameter of the lower portion of the preheating tube (2).

4. The inverted flux nozzle for a 3D printer according to claim 1, characterized in that: The fluxing plate (301) of the fluxing portion (3) comprises an integrally formed connecting tube (3011), a positioning ring (3012) and a prism plate (3013); the positioning ring (3012) is coaxially arranged on the outside of the connecting tube (3011); the upper end of the fluxing tube (302) is connected to the lower end of the connecting tube (3011); the prism plate (3013) is arranged between the connecting tube (3011) and the positioning ring (3012); inner and outer sides of the prism plate (3013) are respectively connected to the outer wall of the connecting tube (3011) and the inner wall of the positioning ring (3012); and a plurality of prism plates (3013) are arranged along the outer wall of the connecting tube (3011).

5. The inverted fluxing nozzle for a 3D printer according to claim 4, characterized in that: The upper and lower parts of the flux tube (302) are both in the shape of a truncated cone with a small outer portion and a large inner portion, and the outer diameter of the upper end of the flux tube (302) is equal to the outer diameter of the connecting tube (3011).

6. The inverted fluxing nozzle for a 3D printer according to claim 4, characterized in that: The cross section of the upper end of the prism plate (3013) is ∧-shaped.

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