Suspended spreading scraper and 3D printer

Abstract

The utility model relates to the technical field of 3D printing, in particular to a suspension type spreading scraper and a 3D printer. The suspension type material spreading scraper comprises a scraper body, and the scraper body is provided with a cutting edge for achieving material spreading; the scraper and the scraper fixing part are connected together in an adjustable manner; the supporting arm is movably connected with the scraper fixing part; the elastic piece is arranged between the supporting arm and the scraper fixing part, so that the scraper fixing part is elastically connected with the supporting arm when the scraper fixing part ascends or descends. The scraper can move up and down within the design error range, the elastic material is installed in the middle of the scraper, and the scraper can move upwards when the stress of the scraper fixing part is larger than the elastic force of the elastic material.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and particularly relates to a suspension type spreading blade and a 3D printer. Background Art

[0002] Stereolithography 3D printers are an advanced manufacturing technology, mainly realized through the principle of photocuring of photosensitive resins. They use specific light sources such as lasers and DLP light machines to cure photosensitive resins, mixtures of photosensitive resins and other materials, or other materials that can undergo photosensitive reactions from a liquid, slurry or paste state into a solid state. This process is a key link in 3D printing, making it possible to manufacture parts with complex shapes and fine structures.

[0003] In the 3D printing process, spreading is a crucial step. The spreading process involves using a moving blade to evenly apply the material on a new printing layer. The material is usually a liquid, paste-like liquid or fine solid particles. In addition, the blade may rub against the protruding agglomerated surface during subsequent spreading, scratching the surface of the printed part or even moving the entire printed part, resulting in printing failure.

[0004] In models such as ceramic 3D printers and metal 3D printers, solid particles sometimes form on the surface of the printed part after forming. When a traditional hard blade collides with these protruding particles, it may damage the printed part or the blade structure. While using a soft blade made of elastic materials such as rubber and silicone can avoid direct damage, its coating performance is usually not as good as that of a hard blade, and it is also more likely to be damaged when encountering protruding particles. Therefore, the existing blade designs are not suitable for all models and materials. Content of the Utility Model

[0005] In view of this, the utility model provides a suspension type spreading blade and a 3D printer to solve problems such as the current technical blade being more likely to be damaged when encountering protruding particles, so as to improve the efficiency and quality of 3D printing.

[0006] In the first aspect, the utility model provides a suspension type spreading blade, comprising:

[0007] A blade, the blade having an edge for spreading the material;

[0008] A blade fixing part, the blade being adjustably connected to the blade fixing part;

[0009] A support arm, the support arm being movably connected to the blade fixing part;

[0010] An elastic member, the elastic member being arranged between the support arm and the blade fixing part, so that the blade fixing part is elastically connected to the support arm when rising or falling.

[0011] Optionally, both the doctor blade and the doctor blade fixing part have first threaded holes with consistent positions. The fine adjustment of the distance between the doctor blade and the doctor blade fixing part is realized by rotating a first screw in the first threaded hole.

[0012] Optionally, the doctor blade has a side surface, and the side surface is detachably connected to the side surface of the doctor blade fixing part.

[0013] Optionally, the doctor blade fixing part has a top surface with a first positioning hole thereon, and the support arm has a bottom surface with a second positioning hole opposite to the first positioning hole; there is also a positioning member with one end located in the first positioning hole and the other end located in the second positioning hole.

[0014] Optionally, the elastic sleeve is sleeved on the positioning member.

[0015] Optionally, it further includes an auxiliary plate. The auxiliary plate abuts against the side surface of the doctor blade, and the auxiliary plate is connected to the side surface of the support arm to limit the movement of the doctor blade in the direction opposite to the material spreading.

[0016] Optionally, both the auxiliary plate and the support arm have second threaded holes, and the two are fixed by second screws.

[0017] Optionally, the support arm has an adjustment hole penetrating through to the doctor blade fixing part, and is connected to the liquid pipeline in the doctor blade fixing part through an adjustable screw to realize the up and down adjustment of the liquid pipeline.

[0018] In a second aspect, the present utility model provides a 3D printer, including the above-mentioned floating material spreading doctor blade.

[0019] Optionally, it further includes an air pipe and a vacuum generating device. The vacuum generating device is connected to the negative pressure inner cavity of the doctor blade fixing part through the air pipe to adsorb the liquid material at a certain height, which serves as a supplement to the liquid material during the coating process of the doctor blade.

[0020] Compared with the prior art, the present utility model realizes the up and down movement of the doctor blade within the design error range. An elastic material is installed in the middle. When the force on the doctor blade fixing part is greater than the elastic force of the elastic material, it will move upward, and when it recovers, the elastic material will bounce the doctor blade fixing part back to the initial position; during the coating process, when the cutting edge of the doctor blade touches the protruding surface of the printed part, it will adaptively lift to avoid direct collision with the printed part, and can automatically rebound when passing over the protrusion to resume the normal coating process; the height of the doctor blade fixing part and the working liquid level is positioned by an adjustable screw, the height of the doctor blade can be quickly adjusted, the cutting edge of the doctor blade is installed and locked on the doctor blade fixing part with a first screw, and the height of the doctor blade fixing part can be adjusted by adjusting the connection between the doctor blade fixing part and the doctor blade support arm to meet the distance to the working plane. Description of the Drawings

[0021] Through the description of the embodiments of the present invention with reference to the following accompanying drawings, the above and other objects, features and advantages of the present invention will become more apparent. In the drawings:

[0022] Figure 1 is a perspective view of the floating scraper in the embodiment of the present invention;

[0023] Figure 2 is a sectional view of the floating scraper in the embodiment of the present invention. Detailed implementation manners

[0024] The following is a description of the present invention based on embodiments. However, it should be noted that the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. However, those skilled in the art can also fully understand the present invention for the parts not described in detail.

[0025] In addition, those of ordinary skill in the art should understand that the provided drawings are only for illustrating the purpose, features and advantages of the present invention, and the drawings are not actually drawn to scale.

[0026] At the same time, unless the context clearly requires, the words such as "including" and "comprising" in the whole specification and claims should be interpreted as the meaning of inclusion rather than exclusion or exhaustive meaning; that is, the meaning of "including but not limited to".

[0027] This embodiment provides a floating spreading scraper, as Figure 1-2 shown, including:

[0028] A scraper 1, the scraper 1 has an edge 2 for spreading materials;

[0029] A scraper fixing part 3, the scraper 1 is adjustably connected to the scraper fixing part 3;

[0030] A support arm 6, the support arm 6 is movably connected to the scraper fixing part 3;

[0031] An elastic member 7, the elastic member 7 is arranged between the support arm 6 and the scraper fixing part 3, so that the scraper fixing part 3 is elastically connected to the support arm 6 when rising or falling.

[0032] In this embodiment, the scraper can move up and down within the design error range. An elastic member 7 is installed between the support arm 6 and the scraper fixing part 3. When the force on the scraper fixing part is greater than the elastic force of the elastic material, it will move upward. When it recovers, the elastic material will spring the scraper fixing part back to the initial position; during the coating process, when the cutting edge of the scraper touches the protruding surface of the printed part, it will adaptively lift to avoid direct collision with the printed part, and can automatically rebound when passing over the protrusion to resume the normal coating process.

[0033] As an alternative embodiment, the elastic member 7 can be a spring or other elastic materials such as flexible plastics.

[0034] As an alternative embodiment, the scraper 1 has a side surface, and the side surface is detachably connected to the side surface of the scraper fixing part 3. Further, both the scraper 1 and the scraper fixing part 3 have first threaded holes 4 with consistent positions. By rotating the first screw 5 in the first threaded hole 4, the distance between the scraper 1 and the scraper fixing part 3 can be finely adjusted or locked.

[0035] As an alternative embodiment, the scraper fixing part 3 has a top surface, and a first positioning hole 8 is provided on the top surface. The support arm has a bottom surface, and a second positioning hole 9 opposite to the first positioning hole 8 is provided on the bottom surface; there is also a positioning member 10 with one end located in the first positioning hole 8 and the other end located in the second positioning hole 9. The other end of the positioning member 10 can move freely in the second positioning hole 9, one end of the positioning member 10 is fixed in the first positioning hole 8, and both ends of the elastic member 7 are fixedly connected to the support arm 6 and the scraper fixing part 3. The positioning member 10 plays a role in positioning the scraper fixing part 3 when the elastic member 7 is compressed or stretched, so that it can only move in the vertical direction.

[0036] As an alternative embodiment, the elastic member 7 is sleeved on the positioning member 10.

[0037] As an alternative embodiment, it further includes an auxiliary plate 11. The auxiliary plate 11 abuts against the side surface of the scraper 1, and the auxiliary plate 11 is connected to the side surface of the support arm 6 to limit the movement of the scraper 1 in the direction opposite to the material spreading.

[0038] As an alternative embodiment, both the auxiliary plate 11 and the support arm 6 have second threaded holes 12, and the two are fixed by a second screw 13.

[0039] As an alternative embodiment, the support arm 6 has an adjustment hole 14 penetrating through to the scraper fixing part 3, and is connected to the liquid pipeline in the scraper fixing part 3 through an adjustable screw 15 to realize the up and down adjustment of the liquid pipeline, and the height of the scraper 2 and the working liquid surface is positioned by the adjustable screw 15.

[0040] In a second aspect, an embodiment of the present utility model further provides a 3D printer, which includes the floating spreading blade of any one of the above embodiments.

[0041] As an alternative implementation, as Figure 2 shown, it further includes an air pipe 16 and a vacuum generating device. The vacuum generating device is connected to the negative pressure inner cavity of the blade fixing part 3 through the air pipe 16 to adsorb the liquid material at a certain height, which serves as a supplement to the liquid material during the coating process of the blade 2.

[0042] The above embodiments are only for expressing the implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations, equivalent replacements, improvements, etc. can be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. Suspended paving scraper, characterized in that: include: A scraper having a cutting edge for spreading the material; A scraper fixing portion, the scraper and the scraper fixing portion are adjustably connected together; A supporting arm, wherein the supporting arm is movably connected to the scraper fixing portion; An elastic member is arranged between the support arm and the scraper fixing portion, so that the scraper fixing portion is elastically connected to the support arm when rising or falling.

2. The suspended paving scraper according to claim 1, characterized in that: The scraper and the scraper fixing part both have first threaded holes in the same position, and the distance between the scraper and the scraper fixing part can be finely adjusted by rotating the first screw in the first threaded hole.

3. The suspended paving scraper according to claim 1 or 2, characterized in that: The scraper has a side surface, and the side surface is detachably connected to the side surface of the scraper fixing portion.

4. The suspended paving scraper according to claim 1 or 2, characterized in that: The scraper fixing part has a top surface with a first positioning hole on it, the support arm has a bottom surface with a second positioning hole opposite to the first positioning hole on it, and also has a positioning piece with one end located in the first positioning hole and the other end located in the second positioning hole.

5. The suspended paving scraper according to claim 4, characterized in that: The elastic member is sleeved on the positioning member.

6. The suspended paving scraper according to claim 1, characterized in that: It also includes an auxiliary plate, which abuts against the side of the scraper and is connected to the side of the support arm to limit the movement of the scraper in the opposite direction of paving.

7. The suspended paving scraper according to claim 1 or 6, characterized in that: The auxiliary plate and the support arm both have a second threaded hole, and the two are fixed by a second screw.

8. The suspended paving scraper according to claim 4, characterized in that: The support arm is provided with an adjustment hole which penetrates the scraper fixing part and is connected with the liquid feed pipe in the scraper fixing part through an adjustable screw to achieve the up and down adjustment of the liquid feed pipe.

9. A 3D printer, characterized in that: It comprises a suspended paving scraper as described in any one of claims 1-8.

10. The 3D printer according to claim 9, characterized in that: It also includes an air pipe and a vacuum generating device. The vacuum generating device is connected to the negative pressure inner cavity of the scraper fixing part through the air pipe to achieve adsorption of a certain height of the slurry, which serves as a supplement to the slurry during the scraper coating process.

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