CN220560418U

CN220560418U - Powder spreading mechanism of 3D printer

Info

Publication number: CN220560418U
Application number: CN202322101395.1U
Authority: CN
Inventors: 刘桐; 骆良顺; 陈大勇; 武斌; 秦东; 赵雪峰
Original assignee: Hart Three Dimensional Zhongshan Metal Material Co ltd
Current assignee: Hart Three Dimensional Zhongshan Metal Material Co ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2024-03-08
Anticipated expiration: 2033-08-07

Abstract

The utility model discloses a powder paving mechanism of a 3D printer, which relates to the technical field of 3D printers and comprises a chassis, wherein the bottom of the chassis is connected with a feeding component, the top of the chassis is provided with a printing laser, the rear side surface of the interior of the chassis is provided with a moving component, the front side surface of the moving end of the moving component is provided with a powder paving component, the front end of the chassis is connected with a box door, the moving component comprises a fixed frame, the two ends of the fixed frame are connected with a screw in a rotating way, the external threads of the screw are connected with a moving seat, the lifting device B drives the feeding piston to lift a certain distance, so that the top of metal powder is higher than a bottom plate, the lifting device A drives the forming piston to move downwards a certain distance, then the motor drives the screw to rotate, and the moving seat drives the powder paving component to move leftwards or rightwards in the fixed frame, the metal powder is scraped into a forming cavity through the powder paving component and is positioned on the forming piston.

Description

Powder spreading mechanism of 3D printer

Technical Field

The utility model relates to the technical field of 3D printers, in particular to a powder paving mechanism of a 3D printer.

Background

The 3D printer is also called a three-dimensional printer, and is a machine for accumulating manufacturing technology, namely, rapid prototyping technology. The selective laser sintering technology adopts laser to selectively sinter and fix powder in layers, and the sintered and molded solidified layers are laminated to form the part with the required shape. The whole process comprises the steps of model establishment, data processing, powder paving, sintering, post-processing and the like;

the existing powder paving mechanism has the advantages that most of the adopted gears drive the powder box to move, the powder is sieved to the forming table through the discharging holes in the powder box, the powder is difficult to control in the powder discharging process, partial powder is easy to accumulate too much, the discharging is uneven, the quality of later-stage formed products is poor, the damage rate of finished products is high, and therefore, the powder paving mechanism of the 3D printer is provided.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a powder paving mechanism of a 3D printer, which solves the problems in the background art.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the powder paving mechanism of the 3D printer comprises a machine case, wherein the bottom of the machine case is connected with a feeding component, a printing laser is installed at the top of the machine case, a movable component is installed on the rear side surface of the interior of the machine case, a powder paving component is installed on the front side surface of the movable end of the movable component, and the front end of the machine case is connected with a box door;

the movable assembly comprises a fixed frame, the two ends of the fixed frame are connected with a screw in a rotating mode, the outer thread of the screw is connected with a movable seat, a motor is installed on the outer side face of the fixed frame, the output end of the motor is connected with one end of the screw, two groups of sliding grooves are formed in the inner side face of the fixed frame, the top and the bottom of the movable seat slide in the two groups of sliding grooves respectively, and the front side face of the movable seat is connected with the rear end of the powder paving assembly.

As a further technical scheme of the utility model, the feeding assembly comprises a bottom plate, a connecting frame is connected in the middle of the bottom plate in a penetrating manner, a molding cavity and a raw material cavity are formed in the connecting frame, a molding piston and a feeding piston are respectively connected in a sliding manner in the molding cavity and the raw material cavity, a lifting device A and a lifting device B are arranged at the bottom end of the connecting frame, and the telescopic ends of the lifting device A and the lifting device B are respectively connected with the bottoms of the molding piston and the feeding piston.

As a further technical scheme of the utility model, a blanking opening is formed at one end of the bottom plate and positioned at one side of the forming cavity, and the edge side surface of the bottom plate is connected with the bottom of the case.

As a further technical scheme of the utility model, a plurality of groups of sliding sleeves are arranged at the bottom of the connecting frame, guide rods are slidably connected in each group of sliding sleeves, and the top ends of the plurality of groups of guide rods are respectively connected with the bottoms of the forming piston and the feeding piston.

According to the technical scheme, the powder paving assembly comprises a mounting seat, the front side surface of the mounting seat is connected with an extension plate, the bottom of the extension plate is provided with a mounting groove, the inside of the mounting groove is connected with a scraping plate, the top end of the scraping plate is provided with a limiting groove, the inside of the mounting seat is provided with a cavity groove, the inside of the cavity groove is slidably connected with a movable plate, the two ends of the movable plate extend to the two sides of the mounting seat, the bottom end of the movable plate is connected with a limiting column, the bottom of the limiting column is located inside the limiting groove, and the top end of the movable plate and the inner side surface of the cavity groove are connected with springs.

As a further technical scheme of the utility model, the rear side surface of the mounting seat is connected with the front side surface of the movable seat, and the top of the scraping plate is in an I-shaped structure.

Advantageous effects

The utility model provides a powder paving mechanism of a 3D printer. Compared with the prior art, the device has the following

The beneficial effects are that:

1. the utility model provides a shop's powder mechanism of 3D printer, it rises certain distance to drive the material loading piston through elevating gear B for metal powder's top is higher than the bottom plate, and elevating gear A drives the shaping piston and moves down certain distance, and then motor drive screw rotates, and then moves the seat and spread powder subassembly and move left or right at the inside drive of fixed frame, scrapes metal powder to the shaping intracavity through shop's powder subassembly, and is located the shaping piston, and this structure can be with the even laying of metal powder.

2. The utility model provides a shop's powder mechanism of 3D printer, through upwards lifting the movable plate, drive spacing post upward movement to extrude the spring, slide the top of scraper blade into the mounting groove inside, make spacing post and spacing groove align, and then loosen the movable plate and make the spring stretch promote movable plate and spacing post downwardly moving, then spacing post gets into spacing inslot portion, thereby with the scraper blade lock inside the mounting groove, installation and dismantlement of scraper blade can be accomplished fast to this structure.

Drawings

Fig. 1 is a schematic structural diagram of a powder spreading mechanism of a 3D printer;

FIG. 2 is a top view of a powder paving mechanism of a 3D printer;

FIG. 3 is a cross-sectional view of A-A of FIG. 2;

FIG. 4 is a top view of a loading assembly in a powder paving mechanism of a 3D printer;

FIG. 5 is a cross-sectional view of B-B of FIG. 4;

FIG. 6 is a schematic diagram of a moving assembly in a powder paving mechanism of a 3D printer;

FIG. 7 is a top view of a powder paving assembly in a powder paving mechanism of a 3D printer;

fig. 8 is a cross-sectional view of C-C of fig. 7.

In the figure: 1. a chassis; 2. a feeding assembly; 21. a bottom plate; 22. a connection frame; 23. a molding cavity; 24. a raw material cavity; 25. forming a piston; 26. a feeding piston; 27. a lifting device A; 28. a lifting device B; 29. a sliding sleeve; 210. a guide rod; 211. a feed opening; 3. a printing laser; 4. a moving assembly; 41. a fixed frame; 42. a screw; 43. a movable seat; 44. a motor; 45. a chute; 5. a powder spreading component; 51. a mounting base; 52. an extension plate; 53. a mounting groove; 54. a scraper; 55. a limit groove; 56. a cavity groove; 57. a moving plate; 58. a limit column; 59. a spring; 6. a box door.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the utility model provides a technical scheme of a powder spreading mechanism of a 3D printer: the utility model provides a shop's powder mechanism of 3D printer, includes quick-witted case 1, and the bottom of machine case 1 is connected with material loading subassembly 2, and printing laser 3 is installed at the top of machine case 1, and movable assembly 4 is installed to the inside trailing flank of machine case 1, and movable assembly 4's movable end leading flank installs shop's powder subassembly 5, and machine case 1's front end is connected with chamber door 6.

The printing laser 3 scans the metal powder on the forming piston 25 to sinter the new layer, and the steps are repeated in this way, and the layers are overlapped layer by layer until the three-dimensional part is formed.

Referring to fig. 6, the moving assembly 4 includes a fixed frame 41, two ends of the fixed frame 41 are connected with a screw rod 42 in a co-rotating manner, an external thread of the screw rod 42 is connected with a moving seat 43, an outer side surface of the fixed frame 41 is provided with a motor 44, an output end of the motor 44 is connected with one end of the screw rod 42, two groups of sliding grooves 45 are formed in an inner side surface of the fixed frame 41, the top and the bottom of the moving seat 43 slide in the two groups of sliding grooves 45 respectively, and a front side surface of the moving seat 43 is connected with a rear end of the powder paving assembly 5.

The motor 44 drives the screw 42 to rotate, and the movable base 43 drives the powder spreading assembly 5 to move leftward or rightward in the fixed frame 41.

Referring to fig. 4-5, the feeding assembly 2 includes a bottom plate 21, a connecting frame 22 is connected in the middle of the bottom plate 21, a forming cavity 23 and a raw material cavity 24 are provided in the connecting frame 22, forming pistons 25 and a feeding piston 26 are slidably connected in the forming cavity 23 and the raw material cavity 24, a lifting device a27 and a lifting device B28 are installed at the bottom end of the connecting frame 22, telescopic ends of the lifting device a27 and the lifting device B28 are connected with bottoms of the forming pistons 25 and the feeding piston 26 respectively, a blanking opening 211 is provided at one end of the bottom plate 21 and located at one side of the forming cavity 23, edge sides of the bottom plate 21 are connected with the bottom of the case 1, a plurality of groups of sliding sleeves 29 are installed at the bottom of the connecting frame 22, guide rods 210 are slidably connected in the inner part of each group of sliding sleeves 29, and top ends of the plurality of groups of guide rods 210 are connected with bottoms of the forming pistons 25 and the feeding piston 26 respectively.

The forming piston 25 and the feeding piston 26 are driven to move upwards or downwards in the forming cavity 23 and the raw material cavity 24 respectively by the lifting device A27 and the lifting device B28, and metal powder is added in the raw material cavity 24 and above the feeding piston 26;

when the metal powder forming device is used, the feeding piston 26 is driven to ascend for a certain distance through the lifting device B28, the top of the metal powder is higher than the bottom plate 21, the forming piston 25 is driven by the lifting device A27 to move downwards for a certain distance, and then the metal powder is scraped into the forming cavity 23 through the moving assembly 4 and the powder paving assembly 5 and is located on the forming piston 25.

Referring to fig. 7-8, the powder spreading assembly 5 includes a mounting seat 51, the front side of the mounting seat 51 is connected with an extension plate 52, a mounting groove 53 is provided at the bottom of the extension plate 52, a scraper 54 is connected inside the mounting groove 53, a limit groove 55 is provided at the top of the scraper 54, a cavity groove 56 is provided inside the mounting seat 51, a moving plate 57 is slidingly connected inside the cavity groove 56, two ends of the moving plate 57 extend to two sides of the mounting seat 51, the bottom end of the moving plate 57 is connected with a limit post 58, the bottom of the limit post 58 is located inside the limit groove 55, a spring 59 is connected between the top of the moving plate 57 and the inner side of the cavity groove 56, the rear side of the mounting seat 51 is connected with the front side of the moving seat 43, and the top of the scraper 54 is in an i-shaped structure.

It should be noted that, by pulling the moving plate 57 upward, the limiting post 58 is driven to move upward, and the spring 59 is extruded, the top of the scraper 54 is slid into the mounting groove 53, so that the limiting post 58 is aligned with the limiting groove 55, and then the moving plate 57 is loosened, so that the spring 59 stretches to push the moving plate 57 and the limiting post 58 to move downward, then the limiting post 58 enters the inside of the limiting groove 55, so that the scraper 54 is locked in the mounting groove 53, and the structure can rapidly complete the installation and the disassembly of the scraper.

The working principle of the utility model is as follows: when the scraper blade 54 is used, the moving plate 57 is lifted upwards to drive the limit post 58 to move upwards, the spring 59 is extruded, the top of the scraper blade 54 is slid into the mounting groove 53, the limit post 58 is aligned with the limit groove 55, the moving plate 57 is further loosened to enable the spring 59 to stretch and push the moving plate 57 and the limit post 58 to move downwards, and then the limit post 58 enters the inside of the limit groove 55, so that the scraper blade 54 is locked in the mounting groove 53; adding metal powder inside the feed chamber 24 and above the feed piston 26;

when the metal powder forming device is used, the feeding piston 26 is driven to ascend for a certain distance through the lifting device B28, so that the top of the metal powder is higher than the bottom plate 21, the lifting device A27 drives the forming piston 25 to move downwards for a certain distance, the motor 44 drives the screw rod 42 to rotate, the movable seat 43 drives the powder paving assembly 5 to move leftwards or rightwards in the fixed frame 41, and the metal powder is scraped into the forming cavity 23 through the powder paving assembly 5 and is positioned on the forming piston 25; the printing laser 3 scans the metal powder on the forming piston 25 to sinter the new layer, and the steps are repeated in a circulating way, and the layers are overlapped layer by layer until the three-dimensional part is formed.

Claims

1. The utility model provides a powder paving mechanism of 3D printer, includes quick-witted case (1), its characterized in that, the bottom of machine case (1) is connected with material loading subassembly (2), print laser (3) are installed at the top of machine case (1), movable subassembly (4) are installed to the inside trailing flank of machine case (1), movable end front side of movable subassembly (4) installs shop powder subassembly (5), the front end of machine case (1) is connected with chamber door (6);

the utility model provides a movable assembly (4) is including fixed frame (41), the both ends of fixed frame (41) rotate jointly and are connected with screw rod (42), the outside threaded connection of screw rod (42) has movable seat (43), motor (44) are installed to the lateral surface of fixed frame (41), and the output of motor (44) links to each other with the one end of screw rod (42), two sets of spouts (45) have been seted up to the medial surface of fixed frame (41), and the top and the bottom of movable seat (43) slide respectively in the inside of two sets of spouts (45), the leading flank of movable seat (43) links to each other with the rear end of shop's powder subassembly (5).

2. The powder paving mechanism of a 3D printer according to claim 1, wherein the feeding component (2) comprises a bottom plate (21), a connecting frame (22) is connected in the middle of the bottom plate (21) in a penetrating manner, a forming cavity (23) and a raw material cavity (24) are formed in the connecting frame (22), a forming piston (25) and a feeding piston (26) are respectively and slidably connected in the forming cavity (23) and the raw material cavity (24), a lifting device A (27) and a lifting device B (28) are mounted at the bottom end of the connecting frame (22), and telescopic ends of the lifting device A (27) and the lifting device B (28) are respectively connected with bottoms of the forming piston (25) and the feeding piston (26).

3. The powder spreading mechanism of a 3D printer according to claim 2, wherein a blanking opening (211) is formed at one end of the bottom plate (21) and positioned at one side of the forming cavity (23), and the edge side surface of the bottom plate (21) is connected with the bottom of the chassis (1).

4. The powder spreading mechanism of a 3D printer according to claim 2, wherein a plurality of groups of sliding sleeves (29) are installed at the bottom of the connecting frame (22), and the inside of each group of sliding sleeves (29) is slidably connected with a guide rod (210), and the top ends of the plurality of groups of guide rods (210) are respectively connected with the bottoms of the forming piston (25) and the feeding piston (26).

5. The powder spreading mechanism of a 3D printer according to claim 1, wherein the powder spreading component (5) comprises a mounting seat (51), an extension plate (52) is connected to the front side of the mounting seat (51), a mounting groove (53) is formed in the bottom of the extension plate (52), a scraper blade (54) is connected to the inside of the mounting groove (53), a limit groove (55) is formed in the top end of the scraper blade (54), a cavity groove (56) is formed in the inside of the mounting seat (51), a movable plate (57) is connected to the inside of the cavity groove (56) in a sliding manner, two ends of the movable plate (57) extend to two sides of the mounting seat (51), a limit post (58) is connected to the bottom end of the movable plate (57), the bottom of the limit post (58) is located inside the limit groove (55), and a spring (59) is connected to the top end of the movable plate (57) and the inner side surface of the cavity groove (56) together.

6. The powder spreading mechanism of a 3D printer according to claim 5, wherein the rear side of the mounting base (51) is connected to the front side of the moving base (43), and the top of the scraper (54) is in an i-shaped structure.