Spray nozzle mechanism of FDM 3D printer

Abstract

The utility model relates to the technical field of 3D printing equipment, and discloses an FDM3D printer nozzle mechanism which comprises a temporary storage tank, the outer wall of the temporary storage tank is fixedly connected with a feeding pipe, the upper surface of the temporary storage tank is fixedly connected with a motor, the output end of the motor is fixedly connected with a rotating shaft, the outer wall of the rotating shaft penetrates into the temporary storage tank, and the feeding pipe is fixedly connected with the rotating shaft. A supporting plate is fixedly connected to the outer wall of the rotating shaft, a connecting rod is fixedly connected to the interior of the supporting plate, a scraping plate is fixedly connected to the outer wall of the connecting rod, the outer wall of the scraping plate is slidably connected to the inner wall of the temporary storage tank, and a heating pipe is fixedly connected to the inner wall of the temporary storage tank. According to the spray nozzle mechanism, the motor drives the supporting plate to rotate so as to drive the scraping plate to rotate on the inner wall of the temporary storage tank, then the heating pipe is used for heating materials in the temporary storage tank, and the problem that most of existing spray nozzle mechanisms cannot clean the materials left on the inner wall of the temporary storage tank is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing equipment, in particular to a nozzle mechanism of an FDM 3D printer. Background Art

[0002] FDM (Fused Deposition Modeling) is a common 3D printing technology, also known as fused deposition modeling or filament deposition modeling. FDM 3D printer is a device that uses FDM technology to manufacture three-dimensional objects. Generally, high temperature is used to melt the material into liquid, which is extruded through the print head and solidified, and finally arranged in three-dimensional space to form a three-dimensional object.

[0003] The Chinese patent document with the search announcement number CN205929480U discloses a nozzle mechanism of an FDM 3D printer, comprising a nozzle, a temperature detector, a heating coil, and a fastening nut; the connecting rod of the nozzle is connected to the radiator by threads, the temperature detector is arranged in the nozzle, and the heating coil is connected and fixed to the nozzle by a fastening nut; the nozzle is an integrated structure; the heating coil is a circular heating coil; the fastening nut is connected to the nozzle by threads; the utility model has a simple structure, the circular heating coil is directly fixed on the nozzle, the heating efficiency is improved, and balanced heating is provided for the nozzle. The nozzle adopts an integrated design to solve the problem of glue overflow; the melting efficiency and the accuracy of temperature control of the nozzle are effectively improved, and the controllability of the nozzle heating effect during printing is ensured, and the risk of nozzle clogging and uneven surface of the printed part due to uneven heating is avoided; the overall structure is simple, easy to produce and process, light weight, and stable temperature during operation, but the scheme cannot remove the materials remaining on the inner wall of the temporary storage tank well, which can easily lead to the problem of incomplete use of materials. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings in the prior art and to propose an FDM 3D printer nozzle mechanism, aiming to improve the problem that most of the existing nozzle mechanisms cannot clean the residual materials on the inner wall of the temporary storage tank.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an FDM 3D printer nozzle mechanism, comprising a temporary storage tank, the outer wall of the temporary storage tank is fixedly connected to a feed pipe, the upper surface of the temporary storage tank is fixedly connected to a motor, the output end of the motor is fixedly connected to a rotating shaft, the outer wall of the rotating shaft penetrates into the interior of the temporary storage tank, the outer wall of the rotating shaft is fixedly connected to a support plate, the interior of the support plate is fixedly connected to a connecting rod, the outer wall of the connecting rod is fixedly connected to a scraper, the outer wall of the scraper is slidably connected to the inner wall of the temporary storage tank, the inner wall of the temporary storage tank is fixedly connected to a heating pipe, the interior of the temporary storage tank is fixedly connected to a delivery pipe, and the outer wall of the delivery pipe is provided with a temperature detector.

[0006] Furthermore, a replacement sleeve is provided on the lower surface of the temporary storage tank, and a connecting component is provided on the lower surface of the temporary storage tank.

[0007] Furthermore, the connection assembly includes a threaded block, an outer wall of the threaded block is fixedly connected to the lower surface of the temporary storage tank, a nut is threadedly connected to the outer wall of the threaded block, and an outer wall of the nut is fixedly connected to the inside of the replacement sleeve.

[0008] Furthermore, a connection seat is fixedly connected to the interior of the replacement sleeve, and the outer wall of the delivery pipe is slidably connected to the interior of the connection seat.

[0009] Furthermore, a guide tube is slidably connected to the interior of the connection seat, a nozzle is fixedly connected to the outer wall of the guide tube, and the outer wall of the nozzle passes through the interior of the replacement sleeve.

[0010] Furthermore, a fixing rod is fixedly connected to the interior of the replacement sleeve, one end of the fixing rod is fixedly connected to a limiting plate, and an outer wall of the limiting plate is fixedly connected to the inner wall of the replacement sleeve.

[0011] Furthermore, a spring is provided on the outer wall of the fixing rod, one end of the spring is fixedly connected to the inner wall of the replacement sleeve, and the other end of the spring is fixedly connected to a pressing plate.

[0012] Furthermore, the interior of the pressing plate is slidably connected to the outer wall of the fixing rod, and a ejector pin is fixedly connected to the lower surface of the pressing plate, and the outer wall of the ejector pin penetrates into the interior of the outlet pipe.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, firstly, the support plate is driven to rotate by the motor, and then the scraper is driven to rotate on the inner wall of the temporary storage tank, and then the heating tube is used to heat the material inside the temporary storage tank, so as to scrape off the residual material on the inner wall of the temporary storage tank and prevent the material from solidifying, which solves the problem that most of the existing nozzle mechanisms cannot clean the residual material on the inner wall of the temporary storage tank, and improves the practicality of the nozzle mechanism.

[0015] 2. In the utility model, the nut is rotated into the threaded block by rotating the replacement sleeve, and the top pin is pressed to dredge the nozzle, thereby preventing the nozzle from being blocked and facilitating the replacement of the nozzle. The problem that most of the existing nozzle mechanisms cannot dredge the nozzle and facilitate installation and disassembly is solved, and the disassembly of the nozzle mechanism is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a three-dimensional structural schematic diagram of a FDM 3D printer nozzle mechanism proposed by the utility model;

[0017] Figure 2 This is a cross-sectional view of the internal structure of a temporary storage tank of a nozzle mechanism of an FDM 3D printer proposed by the utility model;

[0018] Figure 3 This is a cross-sectional view of the internal structure of a replacement sleeve of a nozzle mechanism of an FDM 3D printer proposed by the utility model.

[0019] Legend:

[0020] 1. Temporary storage tank; 2. Feed pipe; 3. Motor; 4. Rotating shaft; 5. Support plate; 6. Connecting rod; 7. Scraper; 8. Heating tube; 9. Delivery pipe; 10. Temperature detector; 11. Threaded block; 12. Nut; 13. Replacement sleeve; 14. Connecting seat; 15. Export pipe; 16. Nozzle; 17. Fixed rod; 18. Spring; 19. Limiting plate; 20. Pressing plate; 21. Ejector pin. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, 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.

[0022] Reference Figure 1-2 , the utility model provides an embodiment: an FDM3D printer nozzle mechanism, including a temporary storage tank 1, the outer wall of the temporary storage tank 1 is fixedly connected with a feed pipe 2, the upper surface of the temporary storage tank 1 is fixedly connected with a motor 3, the output end of the motor 3 is fixedly connected with a rotating shaft 4, the outer wall of the rotating shaft 4 penetrates into the interior of the temporary storage tank 1, the outer wall of the rotating shaft 4 is fixedly connected with a support plate 5, the interior of the support plate 5 is fixedly connected with a connecting rod 6, the outer wall of the connecting rod 6 is fixedly connected with a scraper 7, the outer wall of the scraper 7 is slidably connected to the inner wall of the temporary storage tank 1, the inner wall of the temporary storage tank 1 is fixedly connected with a heating pipe 8, the interior of the temporary storage tank 1 is fixedly connected with a delivery pipe 9, and the outer wall of the delivery pipe 9 is provided with a temperature detector 10;

[0023] Specifically, the outer wall of the temporary storage tank 1 is connected to the feed pipe 2, so that the material can enter the interior of the temporary storage tank 1 from the feed pipe 2, and then the output end of the motor 3 is connected to the rotating shaft 4, the outer wall of the rotating shaft 4 is connected to the support plate 5, so that the support plate 5 can be driven by the motor 3 to start rotating, and then the inside of the support plate 5 is connected to the connecting rod 6, and the outer wall of the connecting rod 6 is connected to the scraper 7, so that the scraper 7 can rotate with the support plate 5, and then the material on the inner wall of the temporary storage tank 1 is scraped off, and then the temperature detector 10 is connected to the conveying pipe 9 to measure the temperature of the material inside the temporary storage tank 1. When the temperature of the material is low, the heating tube 8 is used to heat the material inside the temporary storage tank 1, so as to achieve the effect of scraping off the residual material on the inner wall of the temporary storage tank 1 and preventing the material from solidifying.

[0024] Reference Figure 2-3 , a replacement sleeve 13 is provided on the lower surface of the temporary storage tank 1, and a connecting assembly is provided on the lower surface of the temporary storage tank 1; the connecting assembly includes a threaded block 11, the outer wall of the threaded block 11 is fixedly connected to the lower surface of the temporary storage tank 1, the outer wall of the threaded block 11 is threadedly connected to a nut 12, and the outer wall of the nut 12 is fixedly connected to the inside of the replacement sleeve 13; the inside of the replacement sleeve 13 is fixedly connected to a connecting seat 14, and the outer wall of the delivery pipe 9 is slidably connected to the inside of the connecting seat 14; the inside of the connecting seat 14 is slidably connected to a guide pipe 15, and the outer wall of the guide pipe 15 is fixedly connected to a nozzle 16, and the outer wall of the nozzle 16 penetrates into the inside of the replacement sleeve 13;

[0025] Specifically, the threaded block 11 is connected to the bottom of the temporary storage tank 1, and the top of the replacement sleeve 13 is connected to the nut 12, so that the replacement sleeve 13 can be removed from the temporary storage tank 1 by rotating the nut 12, and then the delivery pipe 9 and the outlet pipe 15 are connected through the connecting seat 14, so that the material inside the delivery pipe 9 can be transported to the nozzle 16, thereby achieving the effect of quickly disassembling and replacing the nozzle.

[0026] Reference Figure 2-3 The interior of the replacement sleeve 13 is fixedly connected with a fixing rod 17, one end of the fixing rod 17 is fixedly connected with a limiting plate 19, and the outer wall of the limiting plate 19 is fixedly connected to the inner wall of the replacement sleeve 13; the outer wall of the fixing rod 17 is provided with a spring 18, one end of the spring 18 is fixedly connected to the inner wall of the replacement sleeve 13, and the other end of the spring 18 is fixedly connected with a pressing plate 20; the inner part of the pressing plate 20 is slidably connected to the outer wall of the fixing rod 17, and the lower surface of the pressing plate 20 is fixedly connected with a ejector pin 21, and the outer wall of the ejector pin 21 penetrates into the interior of the outlet pipe 15;

[0027] Specifically, the fixing rod 17 is connected to the inside of the replacement sleeve 13, and the spring 18 and the pressing plate 20 both slide on the fixing rod 17, and the spring 18 is connected to the inside of the replacement sleeve 13, so that the pressing plate 20 pulls the spring 18 while sliding downward, so that the spring 18 can pull the pressing plate 20 back through the elastic force, and then the ejector pin 21 is connected through the outer wall of the pressing plate 20, so that the ejector pin 21 can clear the nozzle 16, thereby achieving the effect of preventing the nozzle from being blocked.

[0028] Working principle: when it is necessary to scrape the material on the inner wall of the temporary storage tank 1 and detect the material temperature, the output end of the motor 3 drives the rotating shaft 4 to rotate and then drives the support plate 5 to rotate, so that the connecting rod 6 connected to the support plate 5 can rotate together, and then the scraper 7 is fixed by the outer wall of the connecting rod 6 and the scraper 7 is attached to the inner wall of the temporary storage tank 1, so that the scraper 7 can scrape the residual material on the inner wall of the temporary storage tank 1 while rotating, and then the material inside the temporary storage tank 1 is transported through the conveying pipe 9, and then the transported material is detected by the temperature detector 10. When the temperature is low, the heating pipe 8 is used to heat the material inside the temporary storage tank 1. The material is heated, thereby achieving the effect of scraping off the residual material on the inner wall of the temporary storage tank 1 and preventing the material from solidifying. When the nozzle needs to be replaced, the nut 12 is disengaged from the threaded block 11 by rotating the replacement sleeve 13, and then the delivery pipe 9 is pulled out to separate the delivery pipe 9 from the connecting seat 14, thereby achieving the effect of quickly disassembling the replacement sleeve 13, and then the pressing plate 20 is pressed, so that the pressing plate 20 pulls the spring 18 while sliding downward, and the limiting plate 19 limits the sliding distance of the pressing plate 20, so that the pressing plate 20 can push the ejector pin 21 back and forth to dredge the inside of the nozzle 16, thereby achieving the effect of preventing the nozzle 16 from being blocked.

[0029] Finally, it should be noted that the above 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 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. A FDM 3D printer nozzle mechanism, comprising a temporary storage tank (1), characterized in that: The outer wall of the temporary storage tank (1) is fixedly connected to a feed pipe (2); the upper surface of the temporary storage tank (1) is fixedly connected to a motor (3); the output end of the motor (3) is fixedly connected to a rotating shaft (4); the outer wall of the rotating shaft (4) penetrates into the interior of the temporary storage tank (1); the outer wall of the rotating shaft (4) is fixedly connected to a support plate (5); the interior of the support plate (5) is fixedly connected to a connecting rod (6); the outer wall of the connecting rod (6) is fixedly connected to a scraper (7); the outer wall of the scraper (7) is slidably connected to the inner wall of the temporary storage tank (1); the inner wall of the temporary storage tank (1) is fixedly connected to a heating pipe (8); the interior of the temporary storage tank (1) is fixedly connected to a conveying pipe (9); the outer wall of the conveying pipe (9) is provided with a temperature detector (10).

2. The FDM 3D printer nozzle mechanism according to claim 1, characterized in that: A replacement sleeve (13) is provided on the lower surface of the temporary storage tank (1), and a connecting assembly is provided on the lower surface of the temporary storage tank (1).

3. The FDM 3D printer nozzle mechanism according to claim 2, characterized in that: The connection assembly comprises a threaded block (11), the outer wall of the threaded block (11) is fixedly connected to the lower surface of the temporary storage tank (1), the outer wall of the threaded block (11) is threadedly connected to a nut (12), and the outer wall of the nut (12) is fixedly connected to the inside of the replacement sleeve (13).

4. The FDM 3D printer nozzle mechanism according to claim 3, characterized in that: The interior of the replacement sleeve (13) is fixedly connected to a connection seat (14), and the outer wall of the delivery pipe (9) is slidably connected to the interior of the connection seat (14).

5. The FDM 3D printer nozzle mechanism according to claim 4, characterized in that: The interior of the connection seat (14) is slidably connected to a guide tube (15), the outer wall of the guide tube (15) is fixedly connected to a nozzle (16), and the outer wall of the nozzle (16) penetrates into the interior of the replacement sleeve (13).

6. The FDM 3D printer nozzle mechanism according to claim 5, characterized in that: A fixing rod (17) is fixedly connected inside the replacement sleeve (13), one end of the fixing rod (17) is fixedly connected to a limiting plate (19), and the outer wall of the limiting plate (19) is fixedly connected to the inner wall of the replacement sleeve (13).

7. The FDM 3D printer nozzle mechanism according to claim 6, characterized in that: A spring (18) is provided on the outer wall of the fixing rod (17), one end of the spring (18) is fixedly connected to the inner wall of the replacement sleeve (13), and the other end of the spring (18) is fixedly connected to a pressing plate (20).

8. The FDM 3D printer nozzle mechanism according to claim 7, characterized in that: The interior of the pressing plate (20) is slidably connected to the outer wall of the fixing rod (17), and a ejector pin (21) is fixedly connected to the lower surface of the pressing plate (20), and the outer wall of the ejector pin (21) penetrates into the interior of the outlet pipe (15).

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