An fdm printing wire extrusion device

Abstract

The utility model relates to 3D printing structure technical field discloses a kind of FDM printing wire extrusion device, the FDM printing wire extrusion device, including support frame, the side wall of support frame is fixedly installed with electric push rod, the outside of support frame is provided with cylinder, the arc surface of cylinder is provided with feed pipe, the arc surface of cylinder is provided with metal mouth, the outside of cylinder is provided with mounting mechanism.The FDM printing wire extrusion device, bolt is penetrated through through-hole, metal mouth is connected by screw thread, and then metal mouth is conveniently disassembled and replaced, while in the process that metal mouth is docked and installed ring, extrusion ring can be inserted into the gap between sealing strip and metal mouth, the arc surface of sealing strip is adhered to cylinder, the inner wall of metal mouth is adhered to the arc convex setting on sealing strip, ensure the sealing property inside metal mouth, ensure the use effect after metal mouth disassembly and replacement, and then ensure that the use of metal mouth will not cause color overlap.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing structure technology, specifically to an FDM printing filament extrusion device. Background Technology

[0002] FDM conductive filaments can be used to make sensors, printed circuits, etc. 3D printing, a type of rapid prototyping technology, is a technique that uses a digital model file as a basis and employs powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. The extrusion head of 3D printing can be improved by changing the color of the filament during use.

[0003] According to a public announcement of an FDM printing filament extrusion device (announcement number: CN219903368U), when the wedge-shaped metal nozzle needs to be replaced, the fixed foot and the limiting rod are separated by the deformation of the metal sheet, so that the wedge-shaped metal nozzle can be cleaned. The two circular metal cylinders are used alternately.

[0004] However, in actual use, some raw materials remain inside the metal nozzle after use, which can lead to color overlap and affect the effect in subsequent use. In view of this, we propose an FDM printing filament extrusion device. Utility Model Content

[0005] The purpose of this invention is to provide an FDM printing filament extrusion device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an FDM printing filament extrusion device, comprising a support frame, an electric push rod fixedly mounted on the side wall of the support frame, a cylinder provided on the outer side of the support frame, a feed pipe provided on the arc surface of the cylinder, a metal nozzle provided on the arc surface of the cylinder, an installation mechanism provided on the outer side of the cylinder, and a promoting mechanism provided on the outer side of the cylinder, the installation mechanism comprising: The mounting ring is fixedly mounted on the arc surface of the cylinder. The mounting ring has a through hole on its side wall and a compression ring is fixedly mounted on its side wall. A threaded hole is formed on the side wall of the metal nozzle, and a sealing strip is fixedly installed on the inner wall of the metal nozzle.

[0007] Preferably, the promoting mechanism includes a rubber strip, which is fixedly installed on the inner diameter arc surface of the sealing strip, and an annular airbag is fixedly installed on the outer arc surface of the sealing strip.

[0008] Preferably, there are two rubber strips, which are evenly arrayed and fixedly installed on the arc surface of the sealing strip. With multiple rubber strips, the sealing strip compresses the rubber strips to fit against the arc surface of the cylinder, ensuring a tight seal.

[0009] Preferably, the sealing strip is annular, and the shapes of the sealing strip, the annular airbag, and the extrusion ring are adapted to each other so that the extrusion ring can be inserted into the gap between the sealing strip and the metal nozzle.

[0010] Preferably, the metal nozzle has an installation groove at one end near the mounting ring, and the sealing strip has an arc protrusion at the other end away from the mounting ring. The arc protrusion fits the inner wall of the metal nozzle to ensure the sealing of the inside of the metal nozzle.

[0011] Preferably, the sidewall of the mounting ring is detachably connected to a metal nozzle by bolts, allowing the metal nozzle to be disassembled and replaced.

[0012] Preferably, the through hole and the threaded hole are on the same plane and correspond to each other, which facilitates the bolt to fix the metal nozzle.

[0013] Compared with the prior art, the present invention provides an FDM printing filament extrusion device, which has the following advantages: 1. This FDM printing filament extrusion device features an installation mechanism with bolts passing through a through hole and threaded connections to a metal nozzle, facilitating easy disassembly and replacement of the nozzle. During the nozzle's connection to the mounting ring, the extrusion ring is inserted into the gap between the sealing strip and the nozzle, allowing the sealing strip to conform to the curved surface of the cylinder. The arcuate protrusions on the sealing strip fit against the inner wall of the nozzle, ensuring a tight seal and guaranteeing the nozzle's performance after disassembly and replacement. This also prevents color overlap during nozzle use.

[0014] 2. This FDM printing filament extrusion device is equipped with a promoting mechanism. The annular air bladder allows the extrusion ring to be inserted into the gap between the sealing strip and the metal nozzle. When the annular air bladder is squeezed, it deforms, allowing the sealing strip to better fit the inside of the cylinder and cooperate with the annular rubber strip to form a multi-layer seal. This ensures the effectiveness of the device after the metal nozzle is disassembled and replaced, and prevents color overlap during the use of the metal nozzle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a partial cross-sectional view of the cylindrical structure of this utility model; Figure 3 This is a schematic diagram of a partial explosion of the metal nozzle structure of this utility model; Figure 4This is a cross-sectional schematic diagram of the metal nozzle part of the structure of this utility model.

[0016] In the diagram: 1. Support frame; 2. Electric push rod; 3. Mounting mechanism; 301. Mounting ring; 302. Threaded hole; 303. Extrusion ring; 304. Sealing strip; 305. Through hole; 4. Promoting mechanism; 401. Rubber strip; 402. Annular airbag; 5. Cylinder; 6. Metal nozzle; 7. Feed pipe. Detailed Implementation

[0017] like Figures 1-4 As shown, this utility model provides a technical solution: an FDM printing filament extrusion device, including a support frame 1, an electric push rod 2 fixedly installed on the side wall of the support frame 1, a cylinder 5 provided on the outer side of the support frame 1, a feed pipe 7 opened on the arc surface of the cylinder 5, a metal nozzle 6 provided on the arc surface of the cylinder 5, an installation mechanism 3 provided on the outer side of the cylinder 5, and a promotion mechanism 4 provided on the outer side of the cylinder 5. The installation mechanism 3 includes an installation ring 301, a threaded hole 302, an extrusion ring 303, a sealing strip 304, and a through hole 305.

[0018] In one embodiment of the present invention, the mounting ring 301 is fixedly mounted on the arc surface of the cylinder 5, the side wall of the mounting ring 301 is provided with a through hole 305, the side wall of the mounting ring 301 is fixedly mounted with a compression ring 303, the threaded hole 302 is opened on the side wall of the metal nozzle 6, and the inner wall of the metal nozzle 6 is fixedly mounted with a sealing strip 304.

[0019] Additionally, the promoting mechanism 4 includes a rubber strip 401, which is fixedly installed on the inner arc surface of the sealing strip 304. An annular airbag 402 is fixedly installed on the outer arc surface of the sealing strip 304. Two rubber strips 401 are provided, evenly arrayed and fixedly installed on the arc surface of the sealing strip 304. The arrangement of multiple rubber strips 401 ensures a tight seal by compressing the rubber strips 401 against the arc surface of the cylinder 5. The sealing strip 304 is annular in shape, and the shapes of the sealing strip 304, the annular airbag 402, and the compression ring 303 are compatible, allowing the compression ring 303 to be inserted into the gap between the sealing strip 304 and the metal nozzle 6.

[0020] In this embodiment of the invention, a mounting groove is provided at the end of the metal nozzle 6 near the mounting ring 301, and an arc-shaped protrusion is provided at the end of the sealing strip 304 away from the mounting ring 301. The arc-shaped protrusion fits against the inner wall of the metal nozzle 6, ensuring the internal sealing of the metal nozzle 6. The metal nozzle 6 is detachably connected to the side wall of the mounting ring 301 by bolts, allowing the metal nozzle 6 to be disassembled and replaced. The through hole 305 and the threaded hole 302 are on the same plane and correspond to each other, facilitating the fixing of the metal nozzle 6 with bolts.

[0021] In this utility model, during use, the bolt passes through the through hole 305 and the threaded connection to the metal nozzle 6 facilitates the disassembly and replacement of the metal nozzle 6. At the same time, during the process of the metal nozzle 6 aligning with the mounting ring 301, the compression ring 303 can be inserted into the gap between the sealing strip 304 and the metal nozzle 6, so that the sealing strip 304 fits against the arc surface of the cylinder 5. The arc protrusion on the sealing strip 304 fits against the inner wall of the metal nozzle 6, ensuring the internal sealing of the metal nozzle 6 and ensuring the effectiveness of the metal nozzle 6 after disassembly and replacement. In turn, it ensures that the use of the metal nozzle 6 will not cause color overlap.

[0022] Furthermore, the annular airbag 402 is designed so that when the compression ring 303 is inserted into the gap between the sealing strip 304 and the metal nozzle 6, it compresses the annular airbag 402, causing the annular airbag 402 to deform. This allows the sealing strip 304 to better fit the inside of the cylinder 5 in conjunction with the annular rubber strip 401. The annular airbag 402 is filled with inert gas to reduce the impact of ambient temperature on its use, forming a multi-layer seal. This ensures the effectiveness of the metal nozzle 6 after disassembly and replacement, and also prevents color overlap from occurring during the use of the metal nozzle 6.

[0023] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An FDM printing filament extrusion device, comprising a support frame (1), wherein an electric push rod (2) is fixedly installed on the side wall of the support frame (1), and a cylinder (5) is provided on the outer side of the support frame (1), wherein a feed pipe (7) is provided on the arc surface of the cylinder (5), and a metal nozzle (6) is provided on the arc surface of the cylinder (5), characterized in that: An installation mechanism (3) is provided on the outer side of the cylinder (5), and a promoting mechanism (4) is provided on the outer side of the cylinder (5). The installation mechanism (3) includes: Mounting ring (301), the mounting ring (301) is fixedly mounted on the arc surface of the cylinder (5), the side wall of the mounting ring (301) is provided with a through hole (305), and a compression ring (303) is fixedly mounted on the side wall of the mounting ring (301). A threaded hole (302) is provided on the side wall of the metal nozzle (6), and a sealing strip (304) is fixedly installed on the inner wall of the metal nozzle (6).

2. The FDM printing filament extrusion device according to claim 1, characterized in that: The promoting mechanism (4) includes a rubber strip (401), which is fixedly installed on the inner diameter arc surface of the sealing strip (304), and an annular airbag (402) is fixedly installed on the outer arc surface of the sealing strip (304).

3. The FDM printing filament extrusion device according to claim 2, characterized in that: The number of rubber strips (401) is set to two, and the two rubber strips (401) are uniformly arrayed and fixedly installed on the arc surface of the sealing strip (304).

4. The FDM printing filament extrusion device according to claim 2, characterized in that: The sealing strip (304) is annular, and the shapes of the sealing strip (304), the annular airbag (402), and the compression ring (303) are adapted to each other.

5. The FDM printing filament extrusion apparatus according to claim 1, characterized in that: The metal nozzle (6) has an installation groove at one end near the mounting ring (301), and the sealing strip (304) has an arc protrusion at one end away from the mounting ring (301).

6. The FDM printing filament extrusion apparatus according to claim 1, characterized in that: The sidewall of the mounting ring (301) is detachably connected to a metal nozzle (6) by bolts.

7. The FDM printing filament extrusion apparatus according to claim 1, characterized in that: The through hole (305) and the threaded hole (302) are on the same plane, and the through hole (305) and the threaded hole (302) correspond to each other.

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