Multi-color 3D printing nozzle

Abstract

The utility model relates to the technical field of printers, and discloses a multicolor 3D printing nozzle which comprises a shell base (9) and a hollow cylindrical shell (8), a first assembly is inserted in the center of the shell (8), and three second assemblies (7) with the same structure are evenly distributed on the periphery of the shell (8). The single second assembly (7) is used for fully heating the single-color wire twice in the wire flowing channel with the bending part; the first assembly is used for evenly mixing the three-primary-color wires input from the three second assemblies (7) respectively. According to the utility model, the plurality of detachable assemblies are connected and fixed, the processing difficulty is low, the assembly and disassembly are convenient, and the three second assemblies are used for inputting three-primary-color feeding wires, so that the printing color range is wider; each second assembly is provided with two sections of heating sleeves, it is guaranteed that the wires are heated and melted completely, and the phenomenon that a spray head is blocked due to incomplete melting of the wires is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and in particular to a multi-color 3D printing nozzle. Background Technology

[0002] 3D printing is a type of rapid prototyping technology. Currently, multi-color printhead printers are often used to meet the needs of printing mixed colors. The printhead, as one of the most important components of a 3D printer, determines the quality of the printed product. Generally, multi-color printheads include multi-color multi-heads and multi-color single-heads.

[0003] In multi-color, multi-nozzle systems, color transitions are achieved by switching nozzles. However, existing nozzles often result in gaps in the model due to uneven melting of the filament, leading to poor surface finish. Furthermore, existing multi-color single-nozzles suffer from technical problems such as high manufacturing difficulty, high scrap rate, and easy clogging that is difficult to clean. Summary of the Invention

[0004] In order to overcome or alleviate one or more of the above technical problems, the purpose of this utility model is to provide a multi-color 3D printing nozzle.

[0005] This utility model provides the following technical solution:

[0006] A multicolor 3D printing nozzle includes a housing base (9) and a hollow cylindrical housing (8). A first component is inserted at the center of the housing (8), and three second components (7) with the same structure are evenly distributed around it. Each second component (7) is used to heat the monochrome filament twice in a filament flow channel with a bend. The first component is used to mix the three primary color filaments input from the three second components (7).

[0007] According to some embodiments, a single second component (7) includes a hollow cylindrical second tube (74), with a pneumatic connector (73) connected to the top of the second tube (74); a pressure sensor (72) is provided above the pneumatic connector (73), the pressure sensor (72) is used to measure the pressure of the input filament, and the pressure sensor (72) transmits the pressure signal to the outside; a second top cover (71) is provided on the top of the second tube (74); a throat tube (76) is sleeved on the lower part of the second tube (74), the throat tube (76) is provided with external threads, and a heat dissipation tube (75) is fixedly provided on the outside of the throat tube (76); the lower end of the second tube (74) is connected to a second cavity (77), the second cavity (77) has a bend; a heating sleeve (78) is sleeved on each end of the bend.

[0008] According to some embodiments, the first component includes a long tubular first cavity (2), and a first top cover (1) is detachably fixed to the top of the first cavity (2); the upper diameter of the first cavity (2) is larger than the lower diameter, and a first pipe fitting (3) and a heat insulation pipe (4) are sequentially sleeved on its upper part from the inside to the outside; a nozzle (6) is provided on the lower part of the first cavity (2), and a heating block (5) is sleeved on the nozzle (6), and the lower end of the nozzle (6) is a pointed tip; three sets of first through holes are provided on the circumference of the first cavity (2), the first pipe fitting (3) and the heat insulation pipe (4), and the lower ends of the three second cavities (77) are respectively inserted into the three sets of first through holes.

[0009] According to some implementation methods, both the first and second fittings are Teflon pipes.

[0010] According to some embodiments, the throat is made of stainless steel.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This utility model uses multiple detachable components for connection and fixation, which is easy to process and easy to assemble and disassemble. The three second components are used to input the three primary color feed filaments, so that the printing color range is wider. Each second component is equipped with two heating sleeves to ensure that the filaments are completely heated and melted, which greatly reduces the phenomenon of nozzle clogging caused by incomplete melting of the filaments. Removing the first or second top cover can place the probe of the endoscope to inspect the inside of the print head, which is convenient for cleaning the inside of the print head. Attached Figure Description

[0013] Figure 1 This is an overall schematic diagram of the multi-color 3D printing nozzle provided in an embodiment of the present invention.

[0014] Figure 2 for Figure 1 Top view.

[0015] Figure 3 for Figure 2 BB cross-section.

[0016] Figure 4 for Figure 1 Exploded view.

[0017] Figure 5 A schematic diagram of the first component provided in an embodiment of this utility model.

[0018] Figure 6 for Figure 5 A bottom view.

[0019] Figure 7 for Figure 5 Cross-sectional view.

[0020] Figure 8 for Figure 5 Exploded axonometric view.

[0021] Figure 9 for Figure 8 A frontal view of the explosion.

[0022] Figure 10 A schematic diagram of the combination of the second component provided in an embodiment of this utility model.

[0023] Figure 11 for Figure 8 Cross-sectional view.

[0024] Figure 12 for Figure 8 Exploded view.

[0025] In the picture:

[0026] 1-First top cover; 2-First cavity; 3-First fitting; 4-Insulation pipe; 5-Heating block; 6-Nozzle; 7-Second component; 8-Outer shell; 9-Outer shell base; 71-Second top cover; 72-Pressure sensor; 73-Pneumatic connector; 74-Second fitting; 75-Heat dissipation pipe; 76-Throat; 77-Second cavity; 78-Heating jacket. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the embodiments and accompanying drawings. However, it should be understood that the embodiments and accompanying drawings are for illustrative purposes only and do not constitute any limitation on the scope of protection of the present invention. All reasonable modifications and combinations that fall within the scope of the inventive spirit of the present invention are within the scope of protection of the present invention.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. 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 an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figures 1-4 This embodiment provides a multi-color 3D printing nozzle, referred to simply as a printing nozzle in this application, which includes a bottom outer shell base 9 and a hollow cylindrical outer shell 8. A first component is located at the center of the outer shell 8, and three second components 7 are evenly distributed around the outer shell 8. The second components 7 are used to input the feed filaments of the three primary colors, and the first component is used to collect the pigments and atomize the colored inks into fine particles for spraying through the nozzle. The three second components 7 are inserted inward into the first component to mix and melt the filaments.

[0032] like Figures 5-9 The first component, from top to bottom, includes a first top cover 1, a first cavity 2, a first pipe 3, an insulation pipe 4, a heating block 5, and a nozzle 6. For example... Figure 7 The height of the first cavity 2 is the height that penetrates the first component. A first top cover 1 is detachably fixed to the top of the first cavity 2. The first cavity 2 is wider at the top and narrower at the bottom. From the inside to the outside, the first pipe fitting 3 and the heat insulation pipe 4 are sequentially fitted on the upper part of the first cavity 2. A nozzle 6 is provided on the lower part of the first cavity 2. A heating block 5 is fitted on the outer sleeve of the nozzle 6. The lower end of the nozzle 6 is pointed. The heating block 5 heats the filament inside the nozzle 6. The first cavity 2, the first pipe fitting 3, and the heat insulation pipe 4 are provided with corresponding coupling first through holes.

[0033] like Figures 10-12The three second components 7 have the same structure. Each second component 7 includes, from top to bottom, a second top cover 71, a pressure sensor 72, a pneumatic connector 73, a second pipe 74, a heat dissipation pipe 75, a throat 76, a cavity 77, and a heating jacket 78.

[0034] like Figure 11 The hollow cylindrical second tube 74 contains the filament. A pneumatic connector 73 is fitted over it, with its two ends connecting the second tube 74 and a pressure sensor 72 to prevent air leakage and ensure a tighter connection. Above the pneumatic connector 73 is the pressure sensor 72, which measures the pressure of the input filament to prevent excessive overflow. The pressure sensor 72 transmits the signal to an external control system. A second top cover 71 is located on the top of the second tube 74. A throat 76 with external threads is fitted over the lower part of the second tube 74. A heat dissipation pipe 75 is fixed to the outside of the throat 76, and multiple layers of surrounding heat dissipation fins are arranged around the heat dissipation pipe 75. The lower end of the second tube 74 connects to a second cavity 77, which has a bend. A heating sleeve 78 is fitted at each end of the bend to heat the filament. The two heating sleeves 78 can fully heat the filament in the second cavity 77, effectively preventing uneven melting of the filament in the bend.

[0035] The bend helps to collect the pigment on the one hand, and improves the collection speed by changing the inclination angle inside the tube: the upper part is steep, the filament delivery speed is fast, and the stagnation and jamming are less likely to occur; the lower part is gentle, so the molten filament will not be collected into the first component quickly, which is conducive to improving the collection quality and stabilizing homogeneity.

[0036] The lower ends of the three second slots 77 are respectively inserted into the first through holes of the first component and communicate with the internal chambers of the second component.

[0037] When using, assemble according to the above structure, and remove the first top cover 1 and the second top cover 71 before use.

[0038] Both the first and second fittings are made of Teflon tubing. The hose is made of stainless steel.

[0039] The above embodiments are merely preferred embodiments of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that improvements and modifications made by those skilled in the art without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A multi-color 3D printing nozzle, comprising a housing base (9) and a hollow cylindrical housing (8), characterized in that: The outer shell (8) has a first component inserted in the center and three second components (7) with the same structure evenly distributed around it. Each second component (7) is used to heat the monochrome filament twice in the filament flow channel with the bend. The first component is used to mix the three primary color filaments input from the three second components (7) respectively.

2. The multi-color 3D printing nozzle according to claim 1, characterized in that: Each of the second components (7) includes a hollow cylindrical second tube (74), with a pneumatic connector (73) connected to the top of the second tube (74); a pressure sensor (72) is provided above the pneumatic connector (73), the pressure sensor (72) is used to measure the pressure of the input filament, and the pressure sensor (72) transmits the pressure signal to the outside; a second top cover (71) is provided on the top of the second tube (74); a throat tube (76) is sleeved on the lower part of the second tube (74), the throat tube (76) is provided with external threads, and a heat dissipation tube (75) is fixedly provided on the outside of the throat tube (76); the lower end of the second tube (74) is connected to a second cavity (77), the second cavity (77) has a bend; a heating sleeve (78) is sleeved on each end of the bend.

3. The multi-color 3D printing nozzle according to claim 2, characterized in that: The first component includes a long tubular first cavity (2), and a first top cover (1) is detachably fixed to the top of the first cavity (2); the upper diameter of the first cavity (2) is larger than the lower diameter, and a first pipe fitting (3) and a heat insulation pipe (4) are sequentially sleeved on its upper part from the inside to the outside; a nozzle (6) is provided on the lower part of the first cavity (2), and a heating block (5) is sleeved on the nozzle (6), and the lower end of the nozzle (6) is a pointed tip; three sets of first through holes are provided on the circumference of the first cavity (2), the first pipe fitting (3) and the heat insulation pipe (4), and the lower ends of the three second cavities (77) are respectively inserted into the three sets of first through holes.

4. The multi-color 3D printing nozzle according to claim 3, characterized in that: Both the first and second fittings are Teflon pipes.

5. The multi-color 3D printing nozzle according to claim 4, characterized in that: The throat (76) is made of stainless steel.

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