Scraper with attack angle cutting edge, scraper mounting structure of scraper and 3D printer

Abstract

The utility model relates to the technical field of 3D printing, in particular to a scraper with an attack angle cutting edge, a scraper mounting structure of the scraper and a 3D printer. The scraper with the incidence angle cutting edge comprises a scraper main body, an incidence angle cutting edge and an incidence angle cutting edge, the cutting edge is arranged at one end of the scraper main body, the cutting edge is provided with an incidence angle, a first angle is formed between the incidence angle and the moving direction of the scraper, and the first angle is 2-8 degrees; the cutting edge is further provided with a positive elevation angle which is opposite to the moving direction of the scraper and forms a second angle, and the second angle ranges from 120 degrees to 150 degrees. Wherein a structure limited by the incidence angle and the positive elevation angle of the cutting edge is in a sharp angle shape. The problem that materials adhere to the scraper body is solved, the materials are evenly coated on the surface of a printed piece, and meanwhile redundant liquid is scraped away.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and particularly relates to a doctor blade with an angle of attack edge, a doctor blade mounting structure 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. It uses 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 state, slurry state or paste state into solids. 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 the material is a crucial step. The spreading process involves using a moving doctor blade to evenly coat the material on a new printing layer. The material is usually a liquid, paste-like liquid or fine solid particles. Due to surface tension and viscosity, the material easily adheres to the doctor blade structure, resulting in uncontrolled dropping during the coating process, forming scattered liquid clusters. These liquid clusters will form solid clusters on the surface of the part after photocuring, affecting the curing effect and flatness of the current layer.

[0004] In the prior art, the bottom of the doctor blade is usually designed as a flat surface, maintaining a certain distance from the working plane to adapt to the thickness of the working layer. However, this design is prone to scraping against the surface of the printed part during the doctor blade coating process, affecting the printing process and may cause the material to flow out from the gap between the doctor blade and the working plane to the other side, unable to complete the uniform coating of the printing surface. Summary of the Utility Model

[0005] In view of this, the utility model provides a doctor blade with an angle of attack edge, a doctor blade mounting structure and a stereolithography 3D printer to solve the above problems existing in the current doctor blade design, so as to improve the efficiency and quality of 3D printing.

[0006] In a first aspect, the utility model provides a doctor blade with an angle of attack edge, comprising:

[0007] A doctor blade body;

[0008] An edge, the edge is arranged at one end of the doctor blade body, the edge has an angle of attack with a first angle with respect to the movement direction of the doctor blade, wherein the first angle is 2 - 8°; the edge also has a positive rake angle with a second angle opposite to the movement direction of the doctor blade, wherein the second angle is 120 - 150°;

[0009] Wherein, the structure defined by the angle of attack and the positive rake angle of the edge is in a sharp angle shape.

[0010] Optionally, the other end of the blade body is used to connect to a blade mounting structure to fix the blade.

[0011] Optionally, the cutting edge and the blade body are integrally formed.

[0012] Optionally, the cutting edge and the blade body are detachably connected.

[0013] Optionally, there are two sets of cutting edges, which are respectively connected to two positions at one end of the blade body, and the approach angles of the two sets of cutting edges are arranged in opposite directions.

[0014] In a second aspect, the present invention provides a blade mounting structure, including:

[0015] A blade as described above with an approach angle cutting edge;

[0016] A blade mounting portion, which has a mounting position for connecting the blade.

[0017] Optionally, the blade mounting portion has a surface that fits against the side surface of the blade to combine with the blade, and has the mounting position to fix the blade.

[0018] Optionally, the blade and the blade mounting portion have mating threaded holes and are installed together by screws.

[0019] In a third aspect, the present invention provides a 3D printer, including the blade mounting structure as described above.

[0020] Optionally, it further includes a guide rail, and the guide rail is detachably connected to the blade mounting structure.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] The positive approach angle is a pointed design with the blade facing away from the moving direction, which can effectively solve the problem of material sticking to the blade body. When the designed angle needs to exceed 120 degrees, it can prevent the dripping of excess liquid. Description of the Drawings

[0023] Through the following description of the embodiments of the present invention with reference to the drawings, the above and other objects, features, and advantages of the present invention will become clearer. In the drawings:

[0024] Figure 1 is a cross-sectional view of the blade in the embodiment of the present invention;

[0025] Figure 2 is a cross-sectional view of the double-edge blade in the embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of the blade mounting structure in the embodiment of the present invention. Detailed implementation manners

[0027] The present utility model will be described below based on embodiments. However, it should be noted that the present utility model is not limited to these embodiments. In the following detailed description of the present utility model, some specific details are described in detail. However, for the parts not described in detail, those skilled in the art can also fully understand the present utility model.

[0028] 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 utility model, and the drawings are not actually drawn to scale.

[0029] Meanwhile, unless the context clearly requires otherwise, words such as "including", "comprising" and the like throughout the specification and claims should be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".

[0030] This embodiment provides a scraper with an angle of attack edge. As Figure 1 shown, it is a sectional view of the scraper in this embodiment, including:

[0031] A scraper body 1;

[0032] An edge 2, the edge 2 is arranged at one end of the scraper body 1, the edge 2 has an angle of attack with a first angle with respect to the movement direction of the scraper. Among them, the first angle is 2 - 8°; the edge 2 also has a positive rake angle with a second angle opposite to the movement direction of the scraper. Among them, the second angle is 120 - 150°;

[0033] Among them, the structure defined by the angle of attack and the positive rake angle of the edge 2 is in a sharp angle shape.

[0034] In this embodiment, the scraping edge of the scraper is designed with an edge 2 with a special angle. During the process of spreading the material, it scrapes the liquid material forward to evenly coat the material on the surface of the printed part, and at the same time scrapes away the excess liquid. The specially angled edge 2 can prevent the liquid material from adhering to the scraper body, effectively solving the problem of the scraper sticking to the material.

[0035] In an alternative embodiment, the other end of the scraper body 1 is used to connect to a scraper mounting structure to achieve the fixation of the scraper. The other end of the scraper body 2 and the end with the edge are not necessarily at opposite ends, but just the other end of the sectional structure. Those skilled in the art can achieve the fixation of the scraper according to the actual shape of the scraper body 2.

[0036] In an alternative embodiment, the edge 2 and the scraper body 1 are integrally formed to facilitate the realization of mold making or machining.

[0037] In an alternative embodiment, the cutting edge 2 and the scraper body 1 are detachably connected, which facilitates the replacement of the cutting edge to save costs in case of a malfunction of the cutting edge 2.

[0038] In an alternative embodiment, as Figure 2 shown, there are two groups of the cutting edges 2, which are respectively connected to two positions at one end of the scraper body 1, and the included angles of the two groups of cutting edges 2 are arranged in opposite directions. Those skilled in the art can understand that the scraper in this embodiment can be manufactured in different forms, such as a separately installed cutting edge of the scraper, an integrated single scraper, a double scraper, etc., which can meet the process requirements of different types of 3D printer models.

[0039] Second, as Figure 3 shown, it is a schematic diagram of the scraper installation structure of this embodiment. This embodiment also provides a scraper installation structure, including:

[0040] The scraper with an included angle cutting edge 2 as in the above embodiment;

[0041] A scraper installation part 3, and the scraper installation part 3 has an installation position for connecting the scraper.

[0042] In an alternative embodiment, the scraper installation part 3 has a surface that fits against the side surface of the scraper to combine with the scraper, and has the installation position to fix the scraper.

[0043] In an alternative embodiment, the scraper and the scraper installation part 3 have mutually matching threaded holes 4 and are installed together by screws 5.

[0044] Third, this embodiment also provides a 3D printer, including the scraper installation structure as in the above embodiment.

[0045] In an alternative embodiment, as Figure 3 shown, it further includes a guide rail 6, and the guide rail 6 is detachably connected to the scraper installation part 3. Among them, the guide rail 6 and the scraper installation part 3 can be connected by means of screw holes and screws, or can be connected by other means known to those skilled in the art. The guide rail 6 can also drive the scraper to move left and right to scrape the liquid material forward during the paving process.

[0046] The above embodiments are only for expressing the implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, equivalent replacements, improvements, etc. can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A scraper with an angled edge, characterized in that: include: Scraper body; A cutting edge, wherein the cutting edge is arranged at one end of the scraper body, and the cutting edge has an attack angle of a first angle with respect to the scraper movement direction, wherein the first angle is 2-8 degrees; the cutting edge also has a positive elevation angle of a second angle opposite to the scraper movement direction, wherein the second angle is 120-150 degrees; Wherein, the structure defined by the attack angle and the positive elevation angle of the cutting edge is a sharp angle type.

2. The scraper with an angled edge according to claim 1, characterized in that: The other end of the scraper body is used to be connected to the scraper mounting structure to fix the scraper.

3. The scraper with an angled edge according to claim 1 or 2, characterized in that: The cutting edge and the scraper body are integrally formed.

4. The scraper with an angled edge according to claim 1 or 2, characterized in that: The cutting edge and the scraper body are detachably connected.

5. The scraper with an angled edge according to claim 1, characterized in that: The cutting edges are in two groups, which are respectively connected to two positions at one end of the scraper body, and the attack angles of the two groups of cutting edges are arranged opposite to each other.

6. A scraper installation structure, characterized in that: include: A scraper with an angled edge as described in any one of claims 1 to 5; The scraper mounting portion has a mounting position for connecting the scraper.

7. The scraper installation structure according to claim 6, characterized in that: The scraper mounting portion has a surface that fits with the side surface of the scraper so as to be combined with the scraper, and has the mounting position to fix the scraper.

8. The scraper installation structure according to claim 7, characterized in that: The scraper and the scraper mounting portion have threaded holes that match each other and are mounted together by screws.

9. A 3D printer, characterized in that: It comprises a scraper mounting structure as described in any one of claims 6 to 8.

10. The 3D printer according to claim 9, characterized in that: It also includes a guide rail, which is detachably connected to the scraper mounting structure.

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