Liquid metal forming 3D printing device based on flexible circuit board

Abstract

The utility model relates to 3D printing technical field, concretely relates to a liquid metal forming 3D printing device based on flexible circuit board, including spray head main part and auxiliary nozzle, the spray head main part has first threaded portion, second threaded portion and nozzle part, the auxiliary nozzle's discharge hole diameter is less than the discharge hole diameter of spray head main part, the inner wall surface of spray head main part and auxiliary nozzle all respectively inlays a layer of polytetrafluoroethylene plating layer, makes the inner wall form a layer of film, first threaded portion facilitates spray head main part with printer connection realizes installation, further, need to adjust the spray orifice of spray head main part can directly install the auxiliary nozzle through second threaded portion, because the discharge hole diameter of auxiliary nozzle is less than the spray head main part, can realize the size adjustment of the spray material hole during processing, and further solved the problem that the size of the spray nozzle material hole in the existing device cannot be adjusted according to the actual use, and the use is inconvenient.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a liquid metal forming 3D printing device based on a flexible circuit board. Background Technology

[0002] Liquid metal suspension 3D printing technology uses computer-aided 3D design models as a blueprint, gallium-indium liquid metal alloys and other materials as printing inks, and self-healing hydrogels that can freely switch between fluid and solid states as support materials. Through software layering and discretization and a CNC forming system, the printing nozzle can move freely back and forth in the gel support environment according to a pre-set forming path, continuously extruding room temperature liquid metal. The gel material is used to support and fix the shape of the extruded liquid metal, and macroscopic 3D structures with complex shapes are formed by layer-by-layer deposition. In traditional liquid metal 3D printing devices, at the end of printing, excess molten material in the nozzle forms drool-like metal ribbons that enter the printing area, affecting the print quality.

[0003] A search revealed that prior art CN209303715U discloses a liquid metal forming 3D printing device based on a flexible circuit board, including a housing, a nozzle, and a feed tube. The housing has a hollow cavity in the middle, and the nozzle is fixedly installed on the lower surface of the housing. A through hole is opened on the side of the housing, and the feed tube is fixedly installed on the side of the housing and communicates with the cavity through the through hole. A flow-stopping device is fixedly installed inside the housing. The flow-stopping device includes a fixing block, which is fixedly installed inside the housing. A groove is opened on the lower surface of the fixing block, and an electromagnet electrically connected to a controller is fixedly connected to the top of the groove. This utility model, through the combination of the above structures, achieves the effect of immediately blocking the nozzle after 3D printing stops, preventing excess molten material from forming a drool-like metal ribbon in the printing nozzle from entering the printing area and affecting the printing quality.

[0004] However, the above device has the following problems when in use: the size of the nozzle orifice cannot be adjusted according to the actual use, making it inconvenient to use. Utility Model Content

[0005] The purpose of this invention is to provide a liquid metal forming 3D printing device based on a flexible circuit board, which solves the problem that the size of the nozzle orifice in the existing device cannot be adjusted according to the actual use, resulting in inconvenience.

[0006] To achieve the above objectives, this utility model provides a liquid metal forming 3D printing device based on a flexible circuit board, including a nozzle body. The nozzle body has a first threaded portion, a second threaded portion, and a nozzle portion, and a heat dissipation component is provided on the outside. The second threaded portion communicates with the first threaded portion and is provided on the outside of the nozzle portion.

[0007] An auxiliary nozzle is connected to the second threaded part. The diameter of the discharge hole of the auxiliary nozzle is smaller than that of the discharge hole of the nozzle body. The discharge hole is aligned by setting a conical cavity to cooperate with the conical part on the front side of the nozzle part.

[0008] The inner wall surfaces of both the nozzle body and the auxiliary nozzle are coated with a layer of polytetrafluoroethylene (PTFE) to form a thin film on the inner wall. The thickness of the PTFE coating is 0.05-0.08 mm.

[0009] Both the nozzle body and the auxiliary nozzle are rotatably installed or disassembled via an external hexagonal platform.

[0010] The heat dissipation component includes rectangular heat-conducting fins and auxiliary heat-conducting fins. Multiple rectangular heat-conducting fins are integrally and uniformly spaced in an annular arrangement on the outside of the nozzle body; multiple auxiliary heat-conducting fins are integrally and uniformly spaced in an annular arrangement on the outside of the auxiliary nozzle.

[0011] The heat dissipation assembly further includes a first reinforcing ring and a second reinforcing ring. The first reinforcing ring is integrally formed with the plurality of rectangular heat-conducting fins, and the second reinforcing ring is integrally formed with the auxiliary heat-conducting fins.

[0012] The liquid metal forming 3D printing device based on flexible circuit board further includes an auxiliary component, which includes a connecting nozzle and a snap ring. The connecting nozzle is threadedly connected to the auxiliary nozzle and is located on the discharge side of the auxiliary nozzle, and its discharge hole diameter is smaller than that of the auxiliary nozzle. The snap ring is integrally formed with the connecting nozzle and has an external hexagonal structure.

[0013] This invention discloses a liquid metal forming 3D printing device based on a flexible circuit board. The first threaded portion facilitates connection and installation between the nozzle body and the printer. Furthermore, when adjustment of the nozzle orifice is required, an auxiliary nozzle can be directly installed via the second threaded portion. Since the discharge orifice diameter of the auxiliary nozzle is smaller than that of the nozzle body, the size of the discharge orifice can be adjusted during processing. Finally, by internally coating the inner surfaces of both the nozzle body and the auxiliary nozzle with a layer of polytetrafluoroethylene (PTFE), a thin film is formed on the inner wall, effectively reducing friction between the printing material and the nozzle, reducing filamentation, and resulting in smoother filament output, thus improving printing quality. This solves the problem in existing devices where the nozzle orifice size cannot be adjusted according to actual usage, leading to inconvenience. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of the liquid metal forming 3D printing device based on a flexible circuit board according to the first embodiment of this utility model.

[0016] Figure 2 This is a cross-sectional view of the nozzle body according to the first embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the tapered portion of the first embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the conical cavity in the first embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the overall structure of the liquid metal forming 3D printing device based on a flexible circuit board according to the second embodiment of this utility model.

[0020] Figure 6 This is a cross-sectional view of the connecting nozzle of the second embodiment of this utility model.

[0021] In the figure: 101-nozzle body, 102-first threaded part, 103-second threaded part, 104-nozzle part, 105-auxiliary nozzle, 106-discharge hole, 107-conical cavity, 108-conical part, 109-external hexagonal platform, 110-rectangular heat-conducting fin, 111-auxiliary heat-conducting fin, 112-first reinforcing ring, 113-second reinforcing ring, 201-connecting nozzle, 202-clamping ring. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] Example 1:

[0024] like Figures 1 to 4 As shown, where Figure 1 This is a schematic diagram of the overall structure of a liquid metal forming 3D printing device based on a flexible circuit board. Figure 2 This is a cross-sectional view of the nozzle body. Figure 3 This is a schematic diagram of the conical section. Figure 4 This is a schematic diagram of a conical cavity. This invention provides a liquid metal forming 3D printing device based on a flexible circuit board: it includes a nozzle body 101 and an auxiliary nozzle 105. The nozzle body 101 has a first threaded portion 102, a second threaded portion 103, and a nozzle portion 104. The diameter of the discharge hole 106 of the auxiliary nozzle 105 is smaller than the diameter of the discharge hole 106 of the nozzle body 101. The inner wall surfaces of both the nozzle body 101 and the auxiliary nozzle 105 are respectively coated with a layer of polytetrafluoroethylene, forming a thin film on the inner wall. This solution solves the problem in existing devices where the nozzle orifice size cannot be adjusted according to actual usage, leading to inconvenience. It is understood that the aforementioned solution allows for convenient adjustment of the orifice size.

[0025] In this embodiment, the printer adapted to the printhead body 101 can directly adopt existing technology, such as the printer equipment that uses the nozzle of the existing technology CN210436620U.

[0026] The nozzle body 101 has a first threaded portion 102, a second threaded portion 103, and a nozzle portion 104, and a heat dissipation component is provided on the outside. The second threaded portion 103 communicates with the first threaded portion 102 and is located outside the nozzle portion 104. The first threaded portion 102 facilitates the installation of the nozzle body 101 on the printer, the second threaded portion 103 facilitates the installation of the auxiliary nozzle 105, and the nozzle portion 104 is used for material ejection.

[0027] An auxiliary nozzle 105 is connected to the second threaded portion 103. The diameter of the discharge hole 106 of the auxiliary nozzle 105 is smaller than the diameter of the discharge hole 106 of the nozzle body 101. The discharge hole 106 is easily aligned by the conical cavity 107 that engages with the conical portion 108 on the front side of the nozzle portion 104. The engagement of the conical cavity 107 and the conical portion 108 facilitates the guiding engagement when the nozzle body 101 and the discharge hole 106 of the auxiliary nozzle 105 are aligned.

[0028] The inner surfaces of both the printhead body 101 and the auxiliary nozzle 105 are internally coated with a layer of polytetrafluoroethylene (PTFE), forming a thin film on the inner wall. The thickness of the PTFE coating is 0.05-0.08 mm. By internally coating the inner surfaces of both the printhead body 101 and the auxiliary nozzle 105 with a layer of PTFE, a thin film is formed on the inner wall, effectively reducing friction between the printing material and the nozzle, reducing stringing, and resulting in smoother material output, thus improving print quality.

[0029] Secondly, both the nozzle body 101 and the auxiliary nozzle 105 are rotatably installed or disassembled via an external hexagonal platform 109. This structure allows for easy installation or disassembly of the corresponding components using only a wrench.

[0030] Then, a plurality of rectangular heat-conducting fins 110 are integrally and uniformly spaced in a ring on the outer side of the nozzle body 101; a plurality of auxiliary heat-conducting fins 111 are integrally and uniformly spaced in a ring on the outer side of the auxiliary nozzle 105. The rectangular heat-conducting fins 110 facilitate the conduction and heat dissipation of the internal temperature of the nozzle body 101 to the outside, and the auxiliary heat-conducting fins 111 facilitate the conduction and heat dissipation of the internal temperature of the auxiliary nozzle 105 to the outside. The rectangular heat-conducting fins 110 and the auxiliary heat-conducting fins 111 are made of a metal material with good thermal conductivity, and their thickness can be set according to actual conditions while ensuring heat dissipation performance.

[0031] Finally, the first reinforcing ring 112 is integrally formed with the plurality of rectangular heat-conducting fins 110; the second reinforcing ring 113 is integrally formed with the auxiliary heat-conducting fins 111. There are three first reinforcing rings 112, which are used to enhance the stability of the rectangular heat-conducting fins 110, and the second reinforcing rings 113 are used to enhance the stability of the auxiliary heat-conducting fins 111.

[0032] When using this invention to solve the problem of inconvenience caused by the inability to adjust the nozzle orifice size according to actual usage in existing devices, firstly, the first threaded part 102 facilitates the connection and installation of the printhead body 101 to the printer. Furthermore, when adjustment of the nozzle orifice size of the printhead body 101 is required, the auxiliary nozzle 105 can be directly installed via the second threaded part 103. Since the diameter of the discharge orifice 106 of the auxiliary nozzle 105 is smaller than that of the printhead body 101, the size of the nozzle orifice can be adjusted during processing. Finally, by depositing a polytetrafluoroethylene coating on the inner wall surfaces of both the printhead body 101 and the auxiliary nozzle 105, a thin film is formed on the inner wall, effectively reducing friction between the printing material and the nozzle, reducing stringing, and resulting in smoother material output, which improves print quality. This solves the problem of inconvenience caused by the inability to adjust the nozzle orifice size according to actual usage in existing devices.

[0033] Example 2:

[0034] like Figure 5 and Figure 6 As shown, where Figure 5 This is a schematic diagram of the overall structure of a liquid metal forming 3D printing device based on a flexible circuit board. Figure 6 This is a cross-sectional view of the connecting nozzle. Based on the first embodiment, this utility model provides a liquid metal forming 3D printing device based on a flexible circuit board. The liquid metal forming 3D printing device based on a flexible circuit board further includes an additional component, which includes a connecting nozzle 201 and a snap ring 202.

[0035] The connecting nozzle 201 is threadedly connected to the auxiliary nozzle 105 and located on the discharge side of the auxiliary nozzle 105, with its discharge hole diameter being smaller than that of the discharge hole 106 of the auxiliary nozzle 105. The snap-fit ​​ring 202 is integrally formed with the connecting nozzle 201 and has an external hexagonal structure. The auxiliary nozzle 105 has a threaded connection cavity on its front side, which is not connected to the discharge hole 106, facilitating the installation of the threaded end of the connecting nozzle 201. The snap-fit ​​ring 202 facilitates the installation and disassembly of the connecting nozzle 201. The inner surface of the connecting nozzle 201 is coated with a 0.03mm thick polytetrafluoroethylene layer.

[0036] In this embodiment, the connecting nozzle 201 is further installed on the discharge side of the auxiliary nozzle 105. Since the discharge hole diameter of the connecting nozzle 201 is smaller than the discharge hole diameter of the auxiliary nozzle 105, the adjustment structure can be further increased, and the adjustment range of the spray hole can be expanded.

[0037] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A liquid metal forming 3D printing device based on a flexible circuit board, comprising a nozzle body, characterized in that, The nozzle body has a first threaded portion, a second threaded portion and a nozzle portion, and a heat dissipation component is provided on the outside. The second threaded portion communicates with the first threaded portion and is provided on the outside of the nozzle portion. An auxiliary nozzle is connected to the second threaded part. The diameter of the discharge hole of the auxiliary nozzle is smaller than that of the discharge hole of the nozzle body. The discharge hole is aligned by setting a conical cavity to cooperate with the conical part on the front side of the nozzle part. The inner wall surfaces of both the nozzle body and the auxiliary nozzle are internally coated with a layer of polytetrafluoroethylene (PTFE) to form a thin film on the inner wall. The thickness of the PTFE coating is 0.05-0.08 mm.

2. The liquid metal forming 3D printing device based on flexible circuit boards as described in claim 1, characterized in that, Both the nozzle body and the auxiliary nozzle are rotatably installed or disassembled via an external hexagonal platform.

3. The liquid metal forming 3D printing device based on flexible circuit boards as described in claim 1, characterized in that, The heat dissipation assembly includes rectangular heat-conducting fins and auxiliary heat-conducting fins. Multiple rectangular heat-conducting fins are integrally and evenly spaced in a ring on the outside of the nozzle body; multiple auxiliary heat-conducting fins are integrally and evenly spaced in a ring on the outside of the auxiliary nozzle.

4. The liquid metal forming 3D printing device based on flexible circuit boards as described in claim 3, characterized in that, The heat dissipation assembly further includes a first reinforcing ring and a second reinforcing ring, wherein the first reinforcing ring is integrally formed with the plurality of rectangular heat-conducting fins; and the second reinforcing ring is integrally formed with the auxiliary heat-conducting fins.

5. The liquid metal forming 3D printing device based on a flexible circuit board as described in claim 1, characterized in that, The liquid metal forming 3D printing device based on flexible circuit board further includes an auxiliary component, which includes a connecting nozzle and a snap ring. The connecting nozzle is threadedly connected to the auxiliary nozzle and is located on the discharge side of the auxiliary nozzle, and its discharge hole diameter is smaller than that of the auxiliary nozzle. The snap ring is integrally formed with the connecting nozzle and has an external hexagonal structure.

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