Powder scraping device for laser 3D printer

Abstract

The utility model discloses a powder scraping device for a laser 3D printer, relates to the technical field of 3D printers, and aims to solve the technical problem that metal powder is unevenly laid by a current scraper, the powder scraping device comprises a movable shell, a powder scraping mechanism and a limiting mechanism, the powder scraping mechanism and the limiting mechanism are arranged in the movable shell, the upper end and the lower end of the movable shell are open, and the upper end and the lower end of the movable shell are open. The powder scraping mechanism comprises a rotating shaft and a mounting shell mounted at the lower end of the rotating shaft, the rotating shaft is rotationally mounted in the movable shell, a mounting cavity is formed in the mounting shell, a mounting opening communicated with the mounting cavity is formed in the lower end of the mounting shell, a spring is mounted in the mounting cavity, a mounting rod is mounted at the tail end of the spring, and a powder scraping mechanism is mounted in the mounting rod. A positioning buckle is mounted at the front end of the mounting rod. The laser 3D printing device has the advantages that metal powder can be scraped twice, the metal powder can be evenly laid on the printing platform, and the laser 3D printing quality of products can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printer technical field more specifically, relate to a kind of powder scraping device for laser 3D printer. BACKGROUND

[0002] Laser 3D printer is a kind of additive manufacturing technology equipment using laser to heat material and make it melt, then again layer-by-layer accumulation into solid, and laser 3D printing technology is based on the forming idea of "discrete / accumulation forming", and then according to certain interval cutting plane, digital model is segmented into several thin layers by computer software to establish three-dimensional digital model. Then, according to the profile of these thin layers, laser 3D printer melts and accumulates raw materials in order, and finally forms a three-dimensional solid.

[0003] Laser 3D printer needs to use powder scraping device to lay metal powder on printing platform during work, when scraper moves metal powder, excess metal powder will move to the outside of scraper, when scraper is located at the rear of printing platform, it is easy to appear that the powder scraped in the middle of scraper is insufficient, which leads to uneven powder laying, and it will affect the processing quality of product. In view of this, we propose a kind of powder scraping device for laser 3D printer. CONTENT OF UTILITY MODEL

[0004] The utility model aims at overcoming the deficiency of prior art, adapting to reality needs, and providing a kind of powder scraping device for laser 3D printer to solve the technical problem of uneven powder laying of current scraper on metal powder.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a kind of powder scraping device for laser 3D printer, including mobile shell and the powder scraping mechanism and limiting mechanism being arranged in mobile shell, the upper end and the lower end of mobile shell are all open and are arranged, the powder scraping mechanism includes rotating shaft and the installation shell being installed in the lower end of rotating shaft, the rotating shaft is rotatably installed in mobile shell, installation shell is provided with installation cavity, the lower end of installation shell is provided with installation port being communicated with installation cavity, spring is installed in installation cavity, the end of spring is installed with installation rod, and the front end of installation rod is installed with positioning buckle.

[0006] Preferably, the powder scraping mechanism further includes first scraper and second scraper, the first scraper and the second scraper are installed in the lower end of the installation shell from the installation port, the side end of the first scraper and the second scraper is provided with positioning hole, and the positioning buckle is inserted into the positioning hole.

[0007] Preferably, the lower part of the first scraper is provided with powder leakage hole, the front end of the second scraper is provided with groove, the front end of the second scraper is provided with arc part below the groove, and the lower end of the second scraper is provided with flat part.

[0008] Preferably, the front end and the rear end of the mounting shell are provided with an extension hole communicated with the mounting cavity, and a pulling rod is arranged in the extension hole, and the end of the pulling rod is connected with the mounting rod.

[0009] Preferably, the limiting mechanism comprises a mounting plate, a second limiting plate is mounted at the side end of the mounting plate, a plug-in port is formed at the side end of the moving shell, a first limiting plate is mounted at the upper end of the rotating shaft, a limiting hole is formed in the first limiting plate, the second limiting plate extends into the moving shell from the plug-in port and is plugged into the limiting hole, a rotating rod is rotatably mounted at the side end of the mounting plate above the second limiting plate, and a rotating plate is mounted at the end of the rotating rod.

[0010] Preferably, a rotating knob is rotatably mounted at the front end of the moving shell, and the rotating knob is connected with the shaft center of the rotating shaft.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1、The utility model discloses a first scraper and a second scraper are designed, and the first scraper and the second scraper can be used for twice powder spreading in the powder scraping work, the excess metal powder at the front end of the first scraper can enter the front end of the second scraper from the powder leakage port, the metal powder is prevented from moving outward from the front part of the first scraper, the powder spreading can be carried out again through the second scraper, and the effect of uniformly spreading the metal powder is realized.

[0013] 2、The utility model discloses a groove, an arc part and a flat part are designed, the groove structure of the second scraper can make the second scraper store the metal powder, the metal powder is guaranteed to be sufficient when scraping, the arc part is provided to make more metal powder enter the lower part of the second scraper, and the flat part can not only spread the metal powder, but also can compress the metal powder, so that the metal powder is uniformly spread, and the product processing quality is improved.

[0014] 3、The utility model discloses a spring and a positioning buckle are designed, the spring and the positioning buckle can be used for mounting and positioning the first scraper and the second scraper, the mounting rod and the pulling rod can compress the spring to make the positioning buckle separate from the positioning hole, the first scraper and the second scraper can be released, and the first scraper and the second scraper can be disassembled, so that the cumbersome operation of replacing the scraper is reduced, and the scraper can be conveniently replaced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view structure schematic diagram of the utility model;

[0016] Figure 2 It is a rear view structure schematic diagram of the utility model;

[0017] Figure 3The utility model discloses a powder scraping mechanism structure schematic view.

[0018] Figure 4 The utility model discloses a powder scraping mechanism sectional structure schematic view.

[0019] Figure 5 The utility model discloses a scraper structure schematic view.

[0020] Mark explanation in drawing: 101, mobile shell, 102, rotation knob, 200, powder scraping mechanism, 201, rotation shaft, 202, installation shell, 203, installation mouth, 204, installation cavity, 205, first scraper, 2051, powder leakage, 206, second scraper, 2061, recess, 2062, arc part, 2063, flat cutter part, 207, installation rod, 208, spring, 209, positioning buckle, 210, positioning hole, 211, pull rod, 212, first limit board, 213, limit hole, 300, limit mechanism, 301, installation plate, 302, second limit board, 303, rotation rod, 304, rotation plate. Specific implementation

[0021] As Figures 1 to 5 The utility model discloses a powder scraping device for laser 3D printer, including mobile shell 101 and setting in mobile shell 101's powder scraping mechanism 200 and limit mechanism 300, and the upper end and the lower end of mobile shell 101 are all open setting, powder scraping mechanism 200 includes rotation shaft 201 and installs the installation shell 202 at the lower end of rotation shaft 201, and rotation shaft 201 is rotatably installed in mobile shell 101, and installation shell 202 is provided with installation cavity 204, and the lower end of installation shell 202 is provided with the installation mouth 203 that communicates with installation cavity 204, and spring 208 is installed in installation cavity 204, and the end of spring 208 is installed with installation rod 207, and the front end of installation rod 207 is installed with positioning buckle 209, the utility model discloses a structure that sets up and increases scraper, makes metal powder can pass twice powder scraping, makes metal powder can even lay on the printing platform, can improve the quality of product laser 3D printing.

[0022] Specifically, the powder scraping mechanism 200 further includes a first scraper 205 and a second scraper 206, the first scraper 205 and the second scraper 206 are installed at the lower end of the installation shell 202 from the installation mouth 203, and the side end of the first scraper 205 and the second scraper 206 is provided with a positioning hole 210, and the positioning buckle 209 is inserted into the positioning hole 210. In the powder scraping work, the first scraper 205 and the second scraper 206 can perform twice powder laying, and the excess metal powder at the front end of the first scraper 205 can enter the front end of the second scraper 206 from the powder leakage 2051, preventing the metal powder from moving outward from the front part of the first scraper 205, and the second scraper 206 can perform powder laying work again.

[0023] Further, the first scraper 205 is provided with a powder leakage hole 2051 at the lower position, the front end of the second scraper 206 is provided with a groove 2061, the front end of the second scraper 206 is provided with an arc-shaped part 2062 below the groove 2061, and the lower end of the second scraper 206 is provided with a flat part 2063. The structure of the groove 2061 of the second scraper 206 can retain metal powder, ensure sufficient metal powder when scraping, and the arc-shaped part 2062 can make more metal powder enter the lower part of the second scraper 206. The flat part 2063 can not only flatten the metal powder, but also compress the metal powder, so that the metal powder is evenly laid, which is beneficial to improve the processing quality of the product.

[0024] It is worth noting that the front end and the rear end of the mounting shell 202 are provided with extension holes communicating with the mounting cavity 204, and a pulling rod 211 is arranged in the extension hole. The end of the pulling rod 211 is connected with the mounting rod 207. By manually pulling the pulling rod 211, the mounting rod 207 can compress the spring 208 to make the positioning buckle 209 disengage from the positioning hole 210, so as to release the fixation of the first scraper 205 and the second scraper 206.

[0025] It is worth noting that the limiting mechanism 300 includes a mounting plate 301, a second limiting plate 302 is mounted at the side end of the mounting plate 301, a plug-in hole is formed at the side end of the moving shell 101, a first limiting plate 212 is mounted at the upper end of the rotating shaft 201, a limiting hole 213 is formed in the first limiting plate 212, the second limiting plate 302 extends from the plug-in hole into the moving shell 101 and is plugged into the limiting hole 213, a rotating rod 303 is rotatably mounted at the side end of the mounting plate 301 above the second limiting plate 302, and a rotating plate 304 is mounted at the end of the rotating rod 303. The rotating plate 304 can position the second limiting plate 302, prevent the second limiting plate 302 from disengaging from the first limiting plate 212, and limit the powder scraping mechanism 200.

[0026] It is worth noting that the front end of the moving shell 101 is rotatably mounted with a rotating knob 102, and the rotating knob 102 is connected with the shaft center of the rotating shaft 201. After the limiting mechanism 300 is disassembled and removed, the rotating knob 102 can be rotated to rotate the rotating shaft 201, so that the scraper can be rotated upward, and the scraper can be conveniently disassembled and replaced.

[0027] Working principle: the embodiment provides a laser 3D printer with a powder scraping device, when in use, the utility model is installed in the laser 3D printer, and the utility model is made to reciprocate through the driving structure in the laser 3D printer, when the moving shell 101 moves, the metal powder can be scraped by the first scraper 205, the metal powder can be laid on the printing platform, the excess metal powder at the front end of the first scraper 205 can enter the front end of the second scraper 206 from the powder leakage port 2051, the second scraper 206 can be used to lay powder again, the recess 2061 structure of the second scraper 206 can store metal powder, the metal powder for laying powder is guaranteed to be sufficient, the setting of the arc-shaped portion 2062 makes the metal powder entering the lower part of the second scraper 206 more, the cooperation of the flat blade portion 2063 can not only lay the metal powder, but also can compress the metal powder, so that the metal powder is laid uniformly, when the first scraper 205 and the second scraper 206 are worn to be unable to be used, the door at the front end of the laser 3D printer is opened, the limiting mechanism 300 is detached from the moving shell 101 by rotating the rotating plate 304, the limiting of the powder scraping mechanism 200 can be released, the powder scraping mechanism 200 is turned upwards by rotating the rotating knob 102, then the pulling rod 211 is manually pulled, the mounting rod 207 can compress the spring 208 to make the positioning buckle 209 separate from the positioning hole 210, the fixing of the first scraper 205 and the second scraper 206 can be released, then the first scraper 205 and the second scraper 206 can be detached, the scraper can be conveniently replaced.

[0028] The embodiment of the utility model discloses the preferable embodiment, but is not limited to this, the ordinary skill in the art, the spirit of the utility model is easily understood according to the above-mentioned embodiment, and different extension and change are made, but as long as not departing from the spirit of the utility model, all are within the protection scope of the utility model.

Claims

1. A powder scraping device for a laser 3D printer, characterized by, The utility model provides a mobile casing (101) and the scraping powder mechanism (200) and the limiting mechanism (300) of setting in mobile casing (101), the upper end and the lower end of mobile casing (101) are open and set up, the scraping powder mechanism (200) includes rotating shaft (201) and installs the installation shell (202) in the lower end of rotating shaft (201), rotating shaft (201) is rotatably installed in mobile casing (101), installation shell (202) is provided with installation cavity (204) in, the lower end of installation shell (202) is provided with installation mouth (203) with installation cavity (204) intercommunication, spring (208) is installed in installation cavity (204), the end of spring (208) is installed with installation rod (207), and the front end of installation rod (207) is installed with the location buckle (209).

2. The powder scraping device for a laser 3D printer according to claim 1, characterized in that, The scraping powder mechanism (200) further includes a first scraper (205) and a second scraper (206), the first scraper (205) and the second scraper (206) are installed at the lower end of the installation shell (202) from the installation mouth (203), and the side end of the first scraper (205) and the second scraper (206) is provided with a positioning hole (210), and the positioning buckle (209) is inserted into the positioning hole (210).

3. The powder scraping device for a laser 3D printer according to claim 2, characterized in that, The lower part of the first scraper (205) is provided with a powder leakage hole (2051), the front end of the second scraper (206) is provided with a groove (2061), the front end of the second scraper (206) is provided with an arc-shaped part (2062) below the groove (2061), and the lower end of the second scraper (206) is provided with a flat blade part (2063).

4. The powder scraping device for a laser 3D printer according to claim 3, characterized in that, The front end and the rear end of the installation shell (202) are provided with an extension hole in communication with the installation cavity (204), and the extension hole is provided with a pulling rod (211), and the end of the pulling rod (211) is connected with the installation rod (207).

5. The powder scraping device for a laser 3D printer according to claim 4, characterized in that, The limiting mechanism (300) includes a mounting plate (301), the side end of the mounting plate (301) is provided with a second limiting plate (302), the side end of the mobile casing (101) is provided with a plug-in port, the upper end of the rotating shaft (201) is provided with a first limiting plate (212), the first limiting plate (212) is provided with a limiting hole (213), the second limiting plate (302) is inserted into the limiting hole (213) from the plug-in port into the mobile casing (101), and the side end of the mounting plate (301) is rotatably installed with a rotating rod (303) above the second limiting plate (302), and the end of the rotating rod (303) is provided with a rotating plate (304).

6. The powder scraping device for a laser 3D printer according to claim 5, characterized in that, The front end of the mobile casing (101) is rotatably installed with a rotating knob (102), and the rotating knob (102) is connected with the axis of the rotating shaft (201).

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