Scraper device of 3D printer

Abstract

The utility model discloses a scraper device of a 3D printer, which relates to the technical field of 3D printing equipment and comprises a printing frame, a printing table is fixedly mounted in the middle of the printing frame, connecting tables are fixedly mounted on the periphery of the printing table, and a screw rod is fixedly mounted between two connecting tables on one side. A positioning rod is fixedly mounted between the two connecting tables on the other side, a mounting plate is slidably mounted on the periphery of the positioning rod, a plurality of electric push rods which are uniformly distributed are fixedly mounted at the bottom of the mounting plate, mounting strips are fixedly mounted at the bottoms of the electric push rods, and scraper bodies are detachably mounted on the mounting strips. A plurality of uniformly distributed electric push rods are arranged at the bottom of the mounting plate, the heights of the mounting strip and the scraper body can be accurately adjusted, the laying requirements of printing materials with different thicknesses can be easily met, the problem that the materials are laid too thick, too thin or non-uniform is effectively solved, and the bonding strength between printing layers is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing equipment technical field, specifically, relate to a scraper device of 3D printer. BACKGROUND

[0002] In the 3D printing process, whether it is FDM (fused deposition modeling), SLS (selective laser sintering) or SLA (stereolithography) mainstream technology, the printing material needs to be uniformly laid on the surface of the printing table, which directly determines the interlayer bonding strength, product size accuracy and surface smoothness, and the scraper device is the core executive component for realizing accurate material spreading and flattening.

[0003] The existing technology has the problems of complex installation and disassembly structure of the scraper, tedious operation and time-consuming when the scraper is worn or needs to be replaced with different types of scrapers, affecting the printing efficiency, and insufficient flexibility of the height adjustment of the scraper, which is difficult to adapt to the printing material laying requirements of different thicknesses, and is prone to problems of over-thick, over-thin or uneven material laying.

[0004] To solve the above problems, a scraper device of a 3D printer is provided. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, a scraper device of a 3D printer is provided.

[0006] To achieve the above purposes, the utility model adopts the following technical solutions:

[0007] The utility model provides a scraper device of 3D printer, include: printing frame, the middle part fixed mounting of printing frame has the printing table, all fixed mounting have the connecting table around the printing table, fixed mounting have the lead screw between two connecting tables of one side, fixed mounting have the positioning rod between two connecting tables of the other side, the outer periphery fixed mounting of the connecting table close to the lead screw side has the motor, the output end of motor is fixedly connected with one end of lead screw, the outer periphery sliding installation has the mounting plate of positioning rod, the end away from the positioning rod of mounting plate is screw connected with the outer periphery of lead screw, the bottom fixed mounting of mounting plate has a plurality of evenly distributed electric push rod, the bottom fixed mounting of electric push rod has the installation strip, the installation strip is detachably installed with scraper body.

[0008] Preferably, the outer periphery of the installation strip is symmetrically installed with an installation block, the inner part of the installation block is slidingly installed with a sliding rod, the outer periphery of the sliding rod is sleeved with a return spring, the outer periphery of the sliding rod is sleeved with a limiting ring, one end of the limiting ring abuts against one end of the return spring.

[0009] Preferably, the scraper body is installed inside the mounting strip, and symmetrical limit holes are formed on the surface of the scraper body, with one end of the slide rod abutting against the limit holes.

[0010] Preferably, a pull plate is fixedly installed at the end of the slide rod away from the limiting ring.

[0011] Preferably, a printing crossbeam is fixedly installed at the center of the top side of the printing rack.

[0012] Based on the above, the beneficial effects of the scraper device for the 3D printer in this utility model are:

[0013] The mounting plate has multiple evenly distributed electric push rods at the bottom, which can precisely adjust the height of the mounting strip and the scraper body, easily adapting to the laying needs of printing materials of different thicknesses, effectively avoiding the problems of excessively thick, thin, or uneven material laying, and ensuring the bonding strength between printing layers.

[0014] By using the sliding rod, return spring, and limiting hole, the scraper body can be quickly removed by pulling the pull plate. After releasing the pull plate, the return spring drives the sliding rod to automatically engage with the limiting hole to fix the scraper body. No complicated tools are required, which greatly shortens the time for replacing or maintaining the scraper body and improves printing efficiency.

[0015] With the help of the dual guiding structure of lead screw and positioning rod, when the motor drives the lead screw to rotate, the mounting plate slides smoothly along the positioning rod, avoiding deviation and shaking during the movement of the scraper body, ensuring stable contact between the scraper body and the top of the printing table, and improving the dimensional accuracy and surface smoothness of the printed product. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model from a first perspective;

[0017] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this utility model from a second perspective;

[0018] Figure 3 This is a schematic diagram of the scraper body of this utility model;

[0019] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle;

[0020] Figure 5 This utility model Figure 2 Enlarged diagram of point B in the middle.

[0021] The reference numerals in the accompanying drawings of this utility model are as follows: 1. Printer frame; 2. Printer beam; 3. Lead screw; 4. Connecting platform; 5. Motor; 6. Printer table; 7. Positioning rod; 8. Mounting plate; 9. Scraper body; 10. Limiting hole; 11. Electric push rod; 12. Mounting strip; 13. Limiting ring; 14. Return spring; 15. Slide rod; 16. Pull plate; 17. Mounting block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] See Figures 1-5 As shown, this is an embodiment of the present invention, and the scraper device for a 3D printer will be described in detail below:

[0024] A scraper device for a 3D printer, such as Figures 1-5 As shown, it includes: a print stand 1, a print table 6 fixedly installed in the middle of the print stand 1, connecting tables 4 fixedly installed around the print table 6, a lead screw 3 fixedly installed between two connecting tables 4 on one side, a positioning rod 7 fixedly installed between two connecting tables 4 on the other side, a motor 5 fixedly installed on the outer periphery of the connecting table 4 near the lead screw 3, the output end of the motor 5 fixedly connected to one end of the lead screw 3, and a mounting plate 8 slidably installed on the outer periphery of the positioning rod 7, with the end of the mounting plate 8 away from the positioning rod 7 threadedly connected to the outer periphery of the lead screw 3.

[0025] Furthermore, such as Figures 1-5 As shown, multiple evenly distributed electric push rods 11 are fixedly installed at the bottom of the mounting plate 8. An mounting strip 12 is fixedly installed at the bottom of each electric push rod 11. Mounting blocks 17 are symmetrically installed on the outer periphery of the mounting strip 12. A sliding rod 15 is slidably installed inside the mounting block 17. A return spring 14 is sleeved around the outer periphery of the sliding rod 15. A limiting ring 13 is sleeved around the outer periphery of the sliding rod 15. One end of the limiting ring 13 abuts against one end of the return spring 14. A pull plate 16 is fixedly installed at the end of the sliding rod 15 away from the limiting ring 13. A scraper body 9 is installed inside the mounting strip 12. Limiting holes 10 are symmetrically formed on the surface of the scraper body 9, and one end of the sliding rod 15 abuts against the limiting holes 10.

[0026] When the scraper body 9 needs to be driven to move, the motor 5 near the lead screw 3 is started, and the output end of the motor 5 drives the lead screw 3 to rotate; since one end of the mounting plate 8 is threadedly connected with the lead screw 3 and the other end is slidably connected with the positioning rod 7, the rotating movement of the lead screw 3 is converted into the stable linear movement of the mounting plate 8 along the positioning rod 7, thereby driving the related components of the scraper body 9 at the bottom of the mounting plate 8 to move synchronously, and the movement of the scraper body 9 above the printing table 6 is realized.

[0027] When the height of the scraper body 9 needs to be adjusted according to the thickness of the printing material, the electric push rod 11 at the bottom of the mounting plate 8 is controlled to extend and retract; the bottom of the electric push rod 11 is fixedly connected with the mounting strip 12, and the extension and retraction of the electric push rod 11 directly drives the mounting strip 12 and the scraper body 9 installed inside the mounting strip 12 to move up and down, until the bottom of the scraper body 9 reaches the adaptive distance from the top of the printing table 6, so as to meet the laying requirements of materials with different thicknesses. When the scraper body 9 is installed, the pull plate 16 at one end of the sliding rod 15 is pulled outward, the sliding rod 15 slides along the mounting block 17 and drives the limiting ring 13 sleeved outside to compress the reset spring 14; the scraper body 9 is placed into the inside of the mounting strip 12, the limiting holes 10 symmetrically opened on the surface of the scraper body 9 are aligned with the position of the sliding rod 15, the pull plate 16 is released, the reset spring 14 releases the elastic potential energy to reset the limiting ring 13, and then drives the one end of the sliding rod 15 to be clamped into the limiting hole 10, so as to complete the fixation of the scraper body 9. When the scraper body 9 is disassembled, the sliding rod 15 is pulled repeatedly to make the sliding rod 15 disengage from the limiting hole 10, so that the scraper body 9 can be taken out for replacement or maintenance. After the installation and height position adjustment of the scraper body 9 are completed, the 3D printing required materials (such as powder, hot melt material, etc.) are conveyed to the surface of the printing table 6, the motor 5 drives the mounting plate 8 and the scraper body 9 to slide along the top of the printing table 6, and the bottom of the scraper body 9 performs the scraping treatment on the materials on the surface of the printing table 6 during the movement, so that the materials are uniformly laid on the printing table 6, and a flat material basis is provided for the accurate forming of the subsequent 3D printing layer.

[0028] Further, the printing frame 1 is fixedly installed with the printing beam 2 at the top side, the entire device is supported based on the printing frame 1, the printing table 6 fixedly installed in the middle of the printing frame 1 provides a platform for material laying and printing operation, and the printing beam 2 at the middle of the top side of the printing frame 1 can cooperate with other components of the 3D printer to realize printing positioning.

[0029] The working principle of the embodiment is as follows:

[0030] When the scraper body 9 needs to be driven to move, the motor 5 is started, the output end of the motor 5 drives the screw rod 3 to rotate, since one end of the mounting plate 8 is threadedly connected with the screw rod 3 and the other end is slidingly connected with the positioning rod 7, the rotating movement of the screw rod 3 is converted into the stable linear movement of the mounting plate 8 along the positioning rod 7, thereby driving the scraper body 9 and related components at the bottom of the mounting plate 8 to move synchronously, so as to realize the movement of the scraper body 9 above the printing table 6. When the height of the scraper body 9 needs to be adjusted according to the thickness requirement of the printing material, the electric push rod 11 at the bottom of the mounting plate 8 is controlled to extend and retract, the bottom of the electric push rod 11 is fixedly connected with the mounting strip 12, and the extension and retraction of the electric push rod 11 directly drives the mounting strip 12 and the scraper body 9 mounted inside the mounting strip 12 to move up and down until the distance between the bottom of the scraper body 9 and the top of the printing table 6 reaches the adaptive distance. When the scraper body 9 is mounted, the pull plate 16 at one end of the sliding rod 15 is pulled outward, the sliding rod 15 slides along the mounting block 17 and drives the limiting ring 13 peripherally sleeved to compress the reset spring 14, then the scraper body 9 is placed into the mounting strip 12, the limiting holes 10 symmetrically formed on the surface of the scraper body 9 are aligned with the position of the sliding rod 15, the pull plate 16 is released, the reset spring 14 releases the elastic potential energy to reset the limiting ring 13, thereby driving the one end of the sliding rod 15 to be clamped into the limiting hole 10, and the mounting of the scraper body 9 is completed. When the scraper body 9 is dismounted, the sliding rod 15 is pulled to disengage from the limiting hole 10, and the scraper body 9 can be taken out for replacement or maintenance. After the mounting and height position adjustment of the scraper body 9 are completed, the 3D printing required material (such as powder, hot melt material, etc.) is conveyed to the surface of the printing table 6, the motor 5 drives the mounting plate 8 and the scraper body 9 to slide, and the material on the surface of the printing table 6 is scraped flat by the bottom of the scraper body 9 during the movement, so that the material is uniformly laid on the printing table 6, and a flat material basis is provided for the accurate forming of the subsequent 3D printing layer.

[0031] The above merely describes the embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A doctor blade device for a 3D printer, characterized in that Include: The printing frame (1), the printing platform (6) is fixedly installed in the middle of the printing frame (1), the connecting platform (4) is fixedly installed around the printing platform (6), the lead screw (3) is fixedly installed between two connecting platforms (4) on one side, the positioning rod (7) is fixedly installed between two connecting platforms (4) on the other side, the motor (5) is fixedly installed on the outer periphery of the connecting platform (4) near the lead screw (3), the output end of the motor (5) is fixedly connected with one end of the lead screw (3), the mounting plate (8) is slidingly installed on the outer periphery of the positioning rod (7), the end of the mounting plate (8) away from the positioning rod (7) is threadedly connected with the outer periphery of the lead screw (3), a plurality of evenly distributed electric push rods (11) are fixedly installed on the bottom of the mounting plate (8), the mounting strip (12) is fixedly installed on the bottom of the electric push rod (11), and the scraper body (9) is detachably installed on the mounting strip (12).

2. The doctor blade device of claim 1, wherein, The mounting block (17) is symmetrically installed on the outer periphery of the mounting strip (12), the sliding rod (15) is slidingly installed in the mounting block (17), the reset spring (14) is sleeved on the outer periphery of the sliding rod (15), and the limiting ring (13) is sleeved on the outer periphery of the sliding rod (15). One end of the limiting ring (13) abuts against one end of the reset spring (14).

3. The doctor blade device of claim 2, wherein, The scraper body (9) is installed in the mounting strip (12), the limiting hole (10) is symmetrically formed in the surface of the scraper body (9), and one end of the sliding rod (15) abuts against the limiting hole (10).

4. The doctor device of claim 2, wherein, The pull plate (16) is fixedly installed on the end of the sliding rod (15) away from the limiting ring (13).

5. The doctor blade device of claim 1, wherein, The printing cross beam (2) is fixedly installed on the top side of the printing frame (1).

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