3D printer nozzle wiping device

Abstract

The utility model relates to the technical field of 3D printing, and particularly discloses a 3D printer nozzle wiping device which comprises a base, a scraping plate, a thrust rack, a wiping rack and a transmission gear. The thrust rack, the material wiping rack and the transmission gear are arranged in the base, and the thrust rack and the material wiping rack are meshed with the two ends of the transmission gear respectively. One end of the scraping plate is connected with the material wiping rack, the other end of the scraping plate extends to the position below the nozzle, and the direction of the scraping plate is kept perpendicular to the moving direction of the scraping plate. According to the utility model, the thrust rack and the wiping rack are meshed with the transmission gear, so that the moving distance and speed of the scraping plate can be accurately controlled, the consistency and repeatability of each wiping action are ensured by the mechanical transmission mode, and the wiping efficiency and the cleaning effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a nozzle cleaning device for a 3D printer. Background Technique

[0002] The full name of 3D printing (3Dimensional Printing) is three-dimensional printing, which is a technology based on a computer three-dimensional model and formed by layer-by-layer manufacturing through software control. It is a kind of additive manufacturing technology. 3D printing technology is usually realized by using a digital technology printer; the application objects of 3D printers can be in any industry and have wide applications in medical treatment, architecture, automobiles, aerospace and education.

[0003] The full name of FDM 3D printing technology (Fused Deposition Modeling) is fused deposition modeling 3D printing technology, which is a kind of 3D printing technology; currently, traditional desktop 3D printers usually adopt FDM forming technology, use prefabricated plastic wire as printing consumables, and extrude and print models by remelting through a nozzle. Since the development of FMD forming technology to date, multi-color printing has become the development trend of the industry. During 3D printing, residual materials are likely to accumulate at the nozzle, affecting the printing quality and accuracy, and at the same time, it will also affect the efficiency of replacing consumables. Content of the Utility Model

[0004] In order to overcome the problems existing in the prior art, the purpose of the utility model is to provide a nozzle cleaning device for a 3D printer.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a nozzle cleaning device for a 3D printer, including: a base, a scraping plate, a thrust rack, a cleaning rack, and a transmission gear; the thrust rack, the cleaning rack, and the transmission gear are arranged in the base, and the thrust rack and the cleaning rack are respectively meshed with both ends of the transmission gear;

[0006] One end of the scraping plate is connected to the cleaning rack, the other end of the scraping plate extends below the nozzle, and the orientation of the scraping plate is perpendicular to the moving direction of the scraping plate.

[0007] The main working principle: In the initial state, the scraping plate is located at the starting position below the nozzle, maintaining a certain gap with the nozzle. The thrust rack and the cleaning rack are respectively meshed with both ends of the transmission gear and are in a static state.

[0008] When it is necessary to clean the piled material at the nozzle, an external force (such as manual or mechanical drive) acts on the thrust rack, causing it to move along the base inward in the direction of the transmission gear. At this time, as the thrust rack moves, through the meshing action of the transmission gear, the scraping rack is driven to move. When the scraping rack moves, the scraper connected to it also moves accordingly. The orientation of the scraper is perpendicular to the moving direction, ensuring that the scraper can accurately scrape the piled material below the nozzle.

[0009] In summary, the nozzle scraping device of this 3D printer realizes the movement of the scraper and the cleaning of the piled material at the nozzle through the meshing action of the thrust rack, the scraping rack and the transmission gear. This device has a simple structure, convenient operation and good scraping effect, and is suitable for the nozzle cleaning operation of 3D printers.

[0010] Preferably, a chute is provided on the upper surface of the base. The orientation of the chute is parallel to the moving direction of the scraper. A bar is provided above the thrust rack, and the bar extends outside the base through the chute.

[0011] Preferably, the diameter of the end of the transmission gear meshing with the thrust rack is smaller than the diameter of the end meshing with the scraping rack.

[0012] Preferably, a return spring is further included. The return spring is parallel to the moving direction of the scraper. One end of the return spring is connected to the scraping rack, and one end of the return spring is connected to the base.

[0013] Preferably, guide bars are provided on the base along the moving direction of the scraper, and guide grooves are provided on the scraping rack along the moving direction of the scraper. The guide bars and the guide grooves are slidably matched with each other.

[0014] Preferably, a first step is provided at the bottom of the scraping rack, and the bottom of the transmission gear is in contact and cooperation with the first step; a second step is provided above the first step, and the thrust rack is in contact and cooperation with the second step.

[0015] Preferably, a notch is provided on the side of the scraper facing the nozzle. The notch contacts the piled material at the nozzle and hangs down the piled material.

[0016] Preferably, a baffle is provided on the side of the scraper facing away from the notch.

[0017] Preferably, a waste material groove is provided below the scraper. The waste material groove is parallel to the moving direction of the scraper, and the waste material groove is fixedly connected to the base.

[0018] Preferably, an anti-sticking layer is provided on the surface of the waste material groove.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] Through the meshing of the thrust rack and the wiping rack with the transmission gear, the present utility model can precisely control the moving distance and speed of the squeegee. This mechanical transmission method ensures the consistency and repeatability of each wiping action, improving the wiping efficiency and cleaning effect. Since the orientation of the squeegee is perpendicular to the moving direction of the squeegee, this structure helps to more effectively remove the residual material on the surface of the nozzle during the wiping process. The perpendicular wiping action can generate greater friction force, thus cleaning the nozzle more thoroughly. By keeping the nozzle clean, the continuity and uniformity of the material can be ensured, thereby improving the quality of the object printed by 3D printing. A clean nozzle is particularly important for high-precision printing. The use of this device simplifies the maintenance process of the 3D printer nozzle, making the cleaning work more convenient and fast, which not only reduces the workload of the operator but also improves the overall work efficiency.

[0021] In summary, this 3D printer nozzle wiping device provides an efficient, precise and adaptable solution for keeping the nozzle clean, thereby improving the quality and efficiency of 3D printing. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is the overall schematic diagram of the 3D printer nozzle wiping device;

[0024] Figure 2 It is the exploded schematic diagram of the 3D printer nozzle wiping device;

[0025] Figure 3 It is the internal schematic diagram of the 3D printer nozzle wiping device;

[0026] Figure 4 It is the overall schematic diagram of the base;

[0027] 1. Base; 10. Chute; 12. Guide bar; 2. Squeegee; 20. Notch; 21. Baffle; 3. Thrust rack; 30. Stripping bar; 4. Wiping rack; 41. Guide groove; 42. First step; 43. Second step; 5. Transmission gear; 6. Return spring; 7. Waste chute. Detailed Embodiments

[0028] To better understand the above objects, features, and advantages of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present utility model. The described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model.

[0030] The present utility model discloses a 3D printer nozzle scraping device with an innovative design, the structure of which is as Figures 1 to 4 shown, mainly including core components such as a base 1, a scraper 2, a thrust rack 3, a scraping rack 4, and a transmission gear 5. The base 1 serves as a stable support platform for the entire device, responsible for installing and fixing all other components to ensure the stability and reliability of the device during operation. One end of the scraper 2 is closely connected to the scraping rack 4, and the other end extends neatly below the nozzle, specifically for cleaning the residual material that may accumulate at the nozzle. In particular, the orientation of the scraper 2 is always perpendicular to its moving direction, and this design ensures that the scraper 2 can accurately scrape all the piled materials below the nozzle during the cleaning process, thereby effectively avoiding blockage during printing and deterioration of printing quality.

[0031] The thrust rack 3, the scraping rack 4, and the transmission gear 5 are all disposed inside the base 1. Among them, the thrust rack 3 and the scraping rack 4 are respectively meshed with both ends of the transmission gear 5 to form a tight transmission system. When an external force (either manual operation or mechanical drive) acts on the thrust rack 3, it will move in the direction of the transmission gear 5 inside the base 1, and then drive the scraping rack 4 to move through the meshing action of the transmission gear 5. Since the scraping rack 4 is connected to the scraper 2, the movement of the scraping rack 4 will directly drive the scraper 2 to move, realizing the cleaning of the nozzle piled material.

[0032] In some alternative embodiments, a chute 10 may be provided on the upper surface of the base 1, and the orientation of the chute 10 is completely parallel to the moving direction of the scraper 2. At the same time, a bar 30 may be provided above the thrust rack 3, and the bar 30 extends to the outside of the base 1 through the chute 10. In this way, the user can easily manually operate the bar 30 to drive the thrust rack 3 and the entire material scraping mechanism to work.

[0033] In some alternative embodiments, in order to optimize the transmission effect, the diameter of the end of the transmission gear 5 meshing with the thrust rack 3 can be designed to be smaller than the diameter of the end meshing with the material scraping rack 4. This design enables the thrust rack 3 to generate a greater torque when moving, thus more easily driving the material scraping rack 4 and the scraper 2 to move and perform cleaning work.

[0034] In some alternative embodiments, in order to ensure that the device can quickly return to the initial state after the material scraping operation, a return spring 6 may also be included. The return spring 6 is parallel to the moving direction of the scraper 2, with one end connected to the material scraping rack 4 and the other end connected to the base 1. In this way, after the material scraping operation is completed, the return spring 6 will come into play, causing the material scraping rack 4 and the scraper 2 to quickly return to the initial position and wait for the next use.

[0035] In some alternative embodiments, in order to further enhance the stability and accuracy of the device during movement, guide bars 12 may be provided on the base 1 along the moving direction of the scraper 2, and guide grooves 41 may be provided on the material scraping rack 4 along the moving direction of the scraper 2. The guide bars 12 and the guide grooves 41 are in sliding fit with each other, thus ensuring that the material scraping rack 4 and the scraper 2 always remain stable and accurate during movement.

[0036] In some alternative embodiments, in order to limit the vertical movement of the transmission gear 5 and ensure the stability of the transmission, a first step 42 may be provided at the bottom of the material scraping rack 4, and the bottom of the transmission gear 5 is in contact fit with the first step 42. At the same time, a second step 43 may be provided above the first step 42, and the thrust rack 3 is in contact fit with the second step 43. This ingenious step design effectively limits the vertical movement of the transmission gear 5 and ensures the stability and reliability of the transmission.

[0037] In some alternative embodiments, in order to further optimize the cleaning effect and prevent the scraped material pile from splashing to other places, a notch 20 may be provided on the side of the scraper 2 facing the nozzle. The notch 20 is in close contact with the material pile at the nozzle and scrapes off the material pile. At the same time, a baffle 21 may be provided on the side of the scraper 2 opposite to the notch 20, effectively preventing the scraped material pile from splashing to other parts of the device or the surrounding environment.

[0038] In some alternative embodiments, for the convenience of cleaning and maintenance work, a waste chute 7 may also be provided below the scraper 2. The waste chute 7 is completely parallel to the moving direction of the scraper 2 and is fixedly connected to the base 1. In particular, an anti-sticking layer may also be provided on the surface of the waste chute 7, effectively preventing the piled material from adhering to the waste chute 7, thus greatly facilitating the cleaning and maintenance work.

[0039] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Therefore, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A 3D printer nozzle wiping device, characterized in that: include: A base, a scraper, a thrust rack, a wiping rack, and a transmission gear; the thrust rack, the wiping rack, and the transmission gear are arranged in the base, and the thrust rack and the wiping rack are respectively meshed with two ends of the transmission gear; One end of the scraper is connected to the wiping rack, and the other end of the scraper extends to below the nozzle. The orientation of the scraper is perpendicular to the moving direction of the scraper.

2. The 3D printer nozzle wiping device according to claim 1, characterized in that: A slide groove is provided on the upper surface of the base, the direction of the slide groove is parallel to the moving direction of the scraper, and a shift bar is provided above the thrust rack, and the shift bar extends to the outside of the base through the slide groove.

3. The 3D printer nozzle wiping device according to claim 1, characterized in that: The diameter of one end of the transmission gear meshing with the thrust rack is smaller than the diameter of one end of the wiper rack meshing with the thrust rack.

4. The 3D printer nozzle wiping device according to claim 1, characterized in that: It also includes a return spring, which is parallel to the movement direction of the scraper, one end of the return spring is connected to the wiping rack, and one end of the return spring is connected to the base.

5. The 3D printer nozzle wiping device according to claim 1, characterized in that: The base is provided with a guide bar along the moving direction of the scraper, and the wiping rack is provided with a guide groove along the moving direction of the scraper, and the guide bar and the guide groove are slidably matched with each other.

6. The 3D printer nozzle wiping device according to claim 1, characterized in that: A first clamping step is provided at the bottom of the material wiping rack, and the bottom of the transmission gear is in contact with the first clamping step; a second clamping step is provided above the first clamping step, and the thrust rack is in contact with the second clamping step.

7. The 3D printer nozzle wiping device according to claim 1, characterized in that: The scraper is provided with a notch on one side facing the nozzle, and the notch contacts the piled material at the nozzle and hangs the piled material down.

8. The 3D printer nozzle wiping device according to claim 7, characterized in that: A baffle is provided on the side of the scraper facing away from the notch.

9. The 3D printer nozzle wiping device according to claim 1, characterized in that: A waste trough is provided below the scraper, the waste trough is parallel to the moving direction of the scraper, and the waste trough is fixedly connected to the base.

10. The 3D printer nozzle wiping device according to claim 9, characterized in that: The surface of the waste tank is provided with an anti-sticking layer.

Images