Photocuring printer and scraper assembly thereof

Abstract

The utility model relates to the technical field of 3D printing equipment, in particular to a photocuring printer and a scraper assembly thereof, which comprise a mounting seat, a spreading knife and a returning knife, a vertical driving device is arranged on the mounting seat, the vertical driving device is respectively connected with the material spreading cutter and the material returning cutter, the vertical driving device can respectively drive the material spreading cutter and the material returning cutter to slide along the vertical direction, and the material spreading cutter and the material returning cutter are parallel to each other and are arranged back to back; a spreading blade is arranged at the bottom of the spreading knife, the included angle between the slurry scraping surface of the spreading blade and the horizontal plane is alpha, and a material collecting groove is formed in the edge, close to the spreading blade, of the back surface of the spreading knife; a material returning blade is arranged at the bottom of the material returning knife, and the included angle between the slurry scraping surface of the material returning blade and the horizontal plane is beta; wherein, beta < gt >; alpha. According to the utility model, the problem of printing failure caused by the lack of edge slurry during the existing 3d printing can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing equipment, in particular to a light-curing printer and a scraper assembly thereof. Background Art

[0002] A 3D printer, also known as a three-dimensional printer (3DP), is a machine that uses cumulative manufacturing technology, that is, rapid prototyping technology. It is based on a digital model file and uses special wax materials, powdered metals or plastics and other adhesive materials to print layers of adhesive materials to create three-dimensional objects.

[0003] Existing 3D printers need to use a scraper to level the printing slurry during the printing process. However, due to the viscosity of the printing slurry, the scraper will take away the slurry at the edge when leveling the slurry, resulting in material shortage at the edge of the model, which in turn leads to printing failure. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provides a light-curing printer and a scraper assembly thereof, which can solve the problem of missing slurry at the edge of a model after scraping.

[0005] In order to solve the above problems, the utility model proposes a scraper assembly for a light-curing printer, which is characterized by comprising a mounting seat, a spreading knife and a returning knife;

[0006] A vertical driving device is provided on the mounting seat, and the vertical driving device is connected to the paving knife and the return knife respectively, and the vertical driving device can drive the paving knife and the return knife to slide in the vertical direction respectively, and the paving knife and the return knife are parallel to each other and arranged back to back;

[0007] A paving blade is provided at the bottom of the paving knife, the angle between the scraping surface of the paving blade and the horizontal plane is α, and a collecting groove is provided on the back of the paving knife near the edge of the paving blade;

[0008] A return blade is provided at the bottom of the return knife, and the angle between the scraping surface of the return blade and the horizontal plane is β; wherein β>α.

[0009] As an improvement of the above technical solution, the angle between the scraping surface of the paving blade and the horizontal plane is α, 3°≤α≤10°; the angle between the scraping surface of the return blade and the horizontal plane is β, 35°≤β≤50°.

[0010] As an improvement of the above technical solution, the angle between the scraping surface of the paving blade and the horizontal plane is 5°, and the angle between the scraping surface of the return blade and the horizontal plane is 45°.

[0011] As an improvement of the above technical solution, both the paving knife and the return knife are provided with a knife mounting frame, and the knife mounting frame is used to be connected to the vertical drive device;

[0012] The paving knife and the return knife are both slidably connected to the ends at both ends of the tool mounting frame. The tool mounting frame is provided with a leveling micrometer set in the vertical direction at the ends near the two ends. The paving knife and the return knife are both connected to the leveling micrometer.

[0013] As an improvement of the above technical solution, the tool mounting frame is further provided with tension springs at the ends near both ends, and the laying knife and the returning knife are both connected to the tension springs.

[0014] As an improvement of the above technical solution, the aggregate trough includes at least two slurry troughs parallel to each other.

[0015] As an improvement of the above technical solution, the cross-section of the slurry tank is a triangular structure.

[0016] As an improvement of the above technical solution, the vertical drive device includes a device body, a connecting block and a pressure regulating valve;

[0017] The pushing end of the device body is connected to the connecting block, and guide columns are provided at both ends of the connecting block. The guide columns pass through the device body and are slidably connected to the device body; the pressure regulating valve is provided on the side of the device body and is connected to the working air cavity in the device body.

[0018] Correspondingly, the utility model also provides a light-curing printer, comprising the scraper assembly described above.

[0019] The implementation of this utility model has the following beneficial effects:

[0020] Compared with the prior art, the scraper assembly of the utility model includes a paving knife and a return knife, and the paving knife and the return knife are arranged parallel to each other. In particular, the angle between the scraping surface of the paving knife blade and the horizontal plane is α, and the angle between the scraping surface of the return knife blade and the horizontal plane is β, and β>α. During operation, the vertical drive device first drives the paving knife to descend to the working plane, and then drives the paving knife blade of the paving knife to scrape the surface of the slurry flat, then raises the paving knife to the drive device, and lowers the return knife. The blade of the return knife scrapes the slurry collected on one side of the forming table. Since β>α, when scraping back, the return knife can scrape the slurry accumulated by the paving knife back to the surface of the model. Therefore, it can effectively solve the problem of printing failure caused by lack of material at the edge of the model during previous 3D printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional view of a scraper assembly according to an embodiment of the utility model;

[0022] Figure 2 It is a bottom view of a scraper assembly according to an embodiment of the utility model;

[0023] Figure 3 This is a three-dimensional view of a paving knife according to an embodiment of the utility model;

[0024] Figure 4 This is a three-dimensional view of a return knife according to an embodiment of the utility model;

[0025] Figure 5 It is a front view of a spreading knife and a returning knife according to an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0027] See also Figures 1 to 5 As shown, an embodiment of the utility model provides a scraper assembly of a light-curing printer, including a mounting seat 1, a spreading knife 2 and a returning knife 3.

[0028] The embodiment of the utility model improves the scraper assembly of the 3D printer to solve the problem of printing failure caused by lack of material at the edge of the model in the previous printing process.

[0029] Specifically, a vertical driving device 4 is provided on the mounting seat 1, and the vertical driving device 4 is connected to the paving knife 2 and the return knife 3 respectively, and the vertical driving device 4 can drive the paving knife 2 and the return knife 3 to slide in the vertical direction respectively, and the paving knife 2 and the return knife 3 are parallel to each other and arranged back to back;

[0030] The bottom of the paving knife 2 is provided with a paving blade 21, the angle between the scraping surface of the paving blade 21 and the horizontal plane is α, and the back of the paving knife 2 is provided with a collecting groove near the edge of the paving blade 21;

[0031] A return blade 31 is provided at the bottom of the return knife 3, and the angle between the scraping surface of the return blade 31 and the horizontal plane is β; wherein β>α.

[0032] Compared with the prior art, the scraper assembly of the utility model includes a paving knife 2 and a return knife 3, and the paving knife 2 and the return knife 3 are arranged parallel to each other. In particular, the angle between the scraping surface of the paving blade 21 and the horizontal plane is α, and the angle between the scraping surface of the return knife 31 and the horizontal plane is β, and β>α. During operation, the vertical drive device 4 first drives the paving knife 2 to descend to the working plane, and then drives the paving blade 21 of the paving knife 2 to scrape the surface of the slurry, and then raises the paving knife 2 to the drive device 4, and lowers the return knife 3, and the blade of the return knife 3 scrapes the slurry collected on one side of the forming table. Since β>α, when scraping back, the return knife 3 can scrape the slurry accumulated by the paving knife 2 back to the surface of the model. Therefore, it can effectively solve the problem of printing failure caused by lack of material at the edge of the model during previous 3D printing.

[0033] Preferably, the angle between the scraping surface of the paving blade 21 and the horizontal plane is α, 3°<α<10°; the angle between the scraping surface of the return blade 31 and the horizontal plane is β, 35°<β<50°. When α>10°, the angle is too large and too much slurry will be taken away. When α<3°, the surface of the paving blade 21 is nearly parallel to the horizontal plane, and the excess slurry cannot be effectively concentrated on the side of the paving blade 2 close to the return blade 3.

[0034] Optimally, the angle between the scraping surface of the paving blade 21 and the horizontal plane is 5°, and the angle between the scraping surface of the return blade 31 and the horizontal plane is 45°.

[0035] Preferably, the paving knife 2 and the return knife 3 are both provided with a tool mounting frame 5, and the tool mounting frame 5 is used to be connected to the vertical driving device 4;

[0036] The paving knife 2 and the return knife 3 are both slidably connected to the ends of the tool mounting frame 5. The tool mounting frame 5 is provided with a leveling micrometer 51 arranged in the vertical direction at the ends near the two ends. The paving knife 2 and the return knife 3 are both connected to the leveling micrometer 51. The leveling micrometer 51 can fine-tune the horizontal height of the two ends of the paving knife 2 and the return knife 3 so that the bottom of the paving knife 2 and the return knife 3 are parallel to the forming platform.

[0037] Preferably, the tool mounting frame 5 is further provided with a tension spring 52 at the ends near both ends, and the paving knife 2 and the return knife 3 are both connected to the tension spring 52. The tension spring 52 cooperates with the leveling micrometer 51 so that the plane formed by the movement of the paving knife 2 and the return knife 3 is parallel to the forming platform.

[0038] Preferably, the collecting tank 22 includes at least two slurry tanks 221 parallel to each other.

[0039] Preferably, the cross section of the slurry tank 221 is a triangular structure. The cross section of the slurry tank 221 is a triangular structure, which can effectively avoid a large amount of slurry remaining in the slurry tank 221 and causing waste.

[0040] Preferably, the vertical driving device 4 includes a device body 41, a connecting block 42 and a pressure regulating valve 43;

[0041] The pushing end of the device body 41 is connected to the connecting block 42, and guide posts 44 are provided at both ends of the connecting block 42. The guide posts 44 pass through the device body 41 and are slidably connected to the device body 41. The pressure regulating valve 43 is provided on the side of the device body 41 and is connected to the working air cavity in the device body 41. The main function of the pressure regulating valve 43 is to adjust the speed of the scraper moving up and down and to ensure the stability of the air pressure.

[0042] Correspondingly, an embodiment of the utility model further provides a light-curing printer, comprising the scraper assembly described above.

[0043] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A scraper assembly for a light-curing printer, characterized in that: Includes mounting base, paving knife and return knife; A vertical driving device is provided on the mounting seat, and the vertical driving device is connected to the paving knife and the return knife respectively, and the vertical driving device can drive the paving knife and the return knife to slide in the vertical direction respectively, and the paving knife and the return knife are parallel to each other and arranged back to back; A paving blade is provided at the bottom of the paving knife, the angle between the scraping surface of the paving blade and the horizontal plane is α, and a collecting groove is provided on the back of the paving knife near the edge of the paving blade; A return blade is provided at the bottom of the return knife, and the angle between the scraping surface of the return blade and the horizontal plane is β; wherein β>α.

2. The scraper assembly according to claim 1, characterized in that: The angle between the scraping surface of the material spreading blade and the horizontal plane is α, 3°≤α≤10°; the angle between the scraping surface of the material returning blade and the horizontal plane is β, 35°≤β≤50°.

3. The scraper assembly according to claim 2, characterized in that: The angle between the scraping surface of the paving blade and the horizontal plane is 5°, and the angle between the scraping surface of the return blade and the horizontal plane is 45°.

4. The scraper assembly according to claim 1, characterized in that: The paving knife and the return knife are both provided with a knife mounting frame, and the knife mounting frame is used to be connected to the vertical driving device; The paving knife and the return knife are both slidably connected to the ends at both ends of the tool mounting frame. The tool mounting frame is provided with a leveling micrometer set in the vertical direction at the ends near the two ends. The paving knife and the return knife are both connected to the leveling micrometer.

5. The scraper assembly according to claim 4, characterized in that: The tool mounting frame is also provided with tension springs at the ends near the two ends, and the material spreading knife and the material returning knife are both connected to the tension springs.

6. The scraper assembly according to claim 1, characterized in that: The collecting tank comprises at least two slurry tanks which are parallel to each other.

7. The scraper assembly according to claim 6, characterized in that: The cross section of the slurry tank is a triangular structure.

8. The scraper assembly according to claim 1, characterized in that: The vertical driving device comprises a device body, a connecting block and a pressure regulating valve; The pushing end of the device body is connected to the connecting block, and guide columns are provided at both ends of the connecting block. The guide columns pass through the device body and are slidably connected to the device body; the pressure regulating valve is provided on the side of the device body and is connected to the working air cavity in the device body.

9. A light-curing printer, characterized in that: The invention comprises a scraper assembly as claimed in any one of claims 1 to 8.

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