3D printing forming device

Abstract

The utility model provides a 3D printing forming device, which belongs to the field of 3D printing equipment and comprises a box body, a discharging mechanism and a lifting mechanism, an operation table is installed in the box body, a forming cavity is formed in the middle of the operation table, and a printing table is installed in the forming cavity; according to the utility model, after an object is printed and a large amount of metal powder is accumulated in the forming cavity, the electric push rod is controlled to drive the connecting plate to move towards the outside of the two sides of the forming cavity, the connecting plate moves to drive the baffle to move out of the discharge port, and the metal powder in the forming cavity falls into the powder return bin from the discharge port at the moment; and the problem that metal powder is pushed to the surface of the operation table together when the printing table rises and is inconvenient to clean is solved.

Description

Technical Field

[0001] The utility model relates to the field of 3D printing equipment, in particular to a 3D printing molding device. Background Art

[0002] At present, 3D printer components have appeared in people's field of vision, and 3D printers with metal powder laser sintering have increasingly played an important role as a means of industrial processing. The powder supply bin of the existing 3D printer needs to be raised and lowered, which increases the complexity of the structure. The existing 3D printer uses a blade-like thin scraper for powder spreading, but this thin scraper is prone to bending after being hit and pulled by external force, which seriously affects the quality of powder spreading. After this thin scraper has been used for a long time, it will bend and deform even if it is not hit by external force, which affects the quality of powder spreading and increases production costs, which is not conducive to reducing production costs. Among them, the application number is "CN201621095196.8" is a powder spreading device for a small metal powder 3D printer. The powder sprayer of the 3D printer powder spreading device can accurately supply powder according to demand, and can realize two-way powder spreading with the cooperation of the powder spreading roller. The powder return bin can collect and reuse excess powder. It is simple to operate and easy to use. However, there are still certain shortcomings during use: as the substrate descends, the thickness of the metal powder accumulated inside the molding cavity continues to increase. When the printed structure needs to be removed, the powder accumulated in the molding cavity will be pushed out together when the telescopic rod drives the substrate to rise, which requires cleaning the metal powder again, which consumes a lot of time. Utility Model Content

[0003] The purpose of the utility model is to provide a 3D printing molding device to solve the problem raised in the above-mentioned background technology that as the substrate descends, the thickness of the metal powder accumulated inside the molding cavity continues to increase. When the printed structure needs to be removed, the powder accumulated in the molding cavity will be pushed out together when the telescopic rod drives the substrate to rise, so that the metal powder needs to be cleaned again, which consumes a lot of time.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a 3D printing molding device, including a box, a material discharge mechanism and a lifting mechanism;

[0005] Wherein: an operating table is installed inside the box, a molding cavity is installed in the middle of the operating table, a printing table is installed inside the molding cavity, and powder return bins are placed on both sides of the molding cavity inside the box;

[0006] The discharge mechanism comprises discharge ports opened on both sides of the forming cavity, a baffle is installed inside the discharge port, a connecting plate is fixedly installed on the surface of the baffle, electric push rods are fixedly installed on both sides of the forming cavity, and the telescopic ends of the electric push rods are fixedly connected to the connecting plate;

[0007] The lifting mechanism includes a support frame fixedly installed inside the box, racks are fixedly installed on the surface and back of the support frame, a lifting frame is provided on the outside of the support frame, stepper motors are fixedly installed on both sides of the lifting frame, gears are fixedly installed on the output end of the stepper motor, the gears are meshed and connected with the racks, and a printing table is fixedly installed on the top of the lifting frame.

[0008] As a preferred solution of the utility model: slide rails are fixedly installed on both sides of the support frame, and sliding blocks are fixedly installed on both sides of the inner wall of the lifting frame, and the sliding blocks are slidably installed on the surface of the slide rails.

[0009] As a preferred solution of the utility model: both ends of the rack are fixedly installed with limiting teeth.

[0010] As a preferred solution of the utility model: feeding bins are installed on both sides of the inner wall of the box body, and a powder spreading machine is slidably installed on the bottom of the feeding bin.

[0011] As a preferred solution of the utility model: a return trough is provided on both sides of the surface of the operating table corresponding to the feed bin, the return powder bin is arranged at the bottom of the return trough, and one end of the return powder bin extends to the bottom of the molding cavity.

[0012] As a preferred solution of the utility model: a multi-axis adjustment frame is installed on the top of the box, and a laser is installed on the surface of the multi-axis adjustment frame.

[0013] As a preferred solution of the utility model: a control panel is installed on the outer wall of the box, the electric push rod, stepper motor, powder spreading machine and laser are all electrically connected to the control panel, and the control panel is electrically connected to an external power supply.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) A powder return bin is placed on both sides of the molding cavity inside the box body, and a discharge port is opened on both sides of the molding cavity. Electric push rods are installed on both sides of the molding cavity, and a baffle is installed inside the discharge port. The telescopic end of the electric push rod is fixedly connected to the two ends of the connecting plate on the surface of the baffle. When the object is printed and a lot of metal powder is accumulated inside the molding cavity, the electric push rod is controlled to drive the connecting plate to move to the outside of the molding cavity on both sides. The movement of the connecting plate drives the baffle to move out of the discharge port. At this time, the metal powder in the molding cavity falls from the discharge port to the powder return bin, avoiding the problem that the metal powder is pushed to the surface of the operating table when the printing table is raised, which is inconvenient to clean;

[0016] (2) A return trough is provided on the surface of the operating table corresponding to the feed bin. When the powder spreading machine spreads powder back and forth, excess metal powder on the surface of the operating table falls through the return trough into the powder return bin at the bottom for easy recovery. One end of the powder return bin extends to the bottom of the molding cavity, so that after the baffle is opened, the metal powder inside the molding cavity can fall into the powder return bin to avoid scattering to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the discharge mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the lifting mechanism structure of the utility model.

[0021] In the figure: 1. Box; 2. Operating table; 3. Molding cavity; 4. Printing table; 5. Powder return bin; 6. Discharge mechanism; 61. Discharge port; 62. Baffle; 63. Connecting plate; 64. Electric push rod; 7. Lifting mechanism; 71. Support frame; 72. Rack; 73. Lifting frame; 74. Stepper motor; 75. Gear; 76. Slide rail; 77. Slider; 78. Limiting gear; 8. Feed bin; 9. Powder spreading machine; 10. Return trough; 11. Multi-axis adjustment frame; 12. Laser; 13. Control panel. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 4 A 3D printing molding device comprises: a box body 1, a material discharging mechanism 6 and a lifting mechanism 7; an operating table 2 is installed inside the box body 1, a molding cavity 3 is installed in the middle of the operating table 2, a printing table 4 is installed inside the molding cavity 3, and a powder return bin 5 is placed on both sides of the molding cavity 3 inside the box body 1;

[0024] See also Figure 1 , Figure 3The discharge mechanism 6 includes a discharge port 61 opened on both sides of the molding cavity 3, a baffle 62 is installed inside the discharge port 61, a connecting plate 63 is fixedly installed on the surface of the baffle 62, and an electric push rod 64 is fixedly installed on both sides of the molding cavity 3, and the telescopic end of the electric push rod 64 is fixedly connected to the connecting plate 63.

[0025] During specific use: when the printing of the object is completed and a large amount of metal powder is accumulated inside the molding cavity 3, the electric push rod 64 is controlled to drive the connecting plate 63 to move to the outside of the two sides of the molding cavity 3. The movement of the connecting plate 63 drives the baffle 62 to move out of the discharge port 61. At this time, the metal powder in the molding cavity 3 falls from the discharge port 61 to the powder return bin 5, avoiding the problem that the metal powder is pushed to the surface of the operating table 2 when the printing table 4 is raised, which is inconvenient to clean.

[0026] See also Figure 4 , lifting mechanism 7, the lifting mechanism 7 includes a support frame 71 fixedly installed inside the box body 1, and racks 72 are fixedly installed on the surface and back of the support frame 71. A lifting frame 73 is sleeved on the outside of the support frame 71, and stepper motors 74 are fixedly installed on both sides of the lifting frame 73. A gear 75 is fixedly installed on the output end of the stepper motor 74, and the gear 75 is meshed and connected with the rack 72. A printing table 4 is fixedly installed on the top of the lifting frame 73, and slide rails 76 are fixedly installed on both sides of the support frame 71. Slide blocks 77 are fixedly installed on both sides of the inner wall of the lifting frame 73. The slide blocks 77 are slidably installed on the surface of the slide rails 76, and limit teeth 78 are fixedly installed on both ends of the rack 72.

[0027] During specific use: racks 72 are installed on the surface and back of the support frame 71, and stepper motors 74 are installed on both sides of the surface of the lifting frame 73 mounted on the outside of the support frame 71. The stepper motor 74 is controlled to drive the gear 75 to rotate, and the gear 75 rotates and engages with the rack 72 so that the lifting frame 73 is lifted and lowered along the rack 72. The lifting of the lifting frame 73 drives the top printing table 4 to be lifted and lowered, which is convenient for printing objects. During the lifting process, the sliders 77 installed on both sides of the inner wall of the lifting frame 73 slide on the slide rails 76 on both sides of the support frame 71, so that the lifting frame 73 maintains stable lifting. At the same time, the limiting teeth 78 installed at both ends of the rack 72 play the role of limiting the adjustment range of the limiting teeth 78 to prevent the gear 75 from falling off the rack 72.

[0028] See also Figure 1 , Figure 2 A feeding bin 8 is installed on both sides of the inner wall of the box body 1, and a powder spreading machine 9 is slidably installed at the bottom of the feeding bin 8.

[0029] During specific use: the feed bins 8 installed on both sides of the inner wall of the box 1 are used to hold metal powder for printing. The metal powder inside the feed bin 8 falls to the powder spreading machine 9 at the bottom, and the metal powder is spread on the printing table 4 through the powder spreading machine 9, which is convenient for providing raw materials for laser sintering.

[0030] See also Figure 1 , Figure 2 A return trough 10 is provided on both sides of the surface of the operating table 2 corresponding to the feed bin 8 , a return powder bin 5 is arranged at the bottom of the return trough 10 , and one end of the return powder bin 5 extends to the bottom of the molding cavity 3 .

[0031] During specific use: a return trough 10 is provided on the surface of the operating table 2 corresponding to the feed bin 8. When the powder spreading machine 9 spreads powder back and forth, excess metal powder on the surface of the operating table 2 falls through the return trough 10 to the inside of the powder return bin 5 at the bottom, which is convenient for recovery. One end of the powder return bin 5 extends to the bottom of the molding cavity 3, so that after the baffle 62 is opened, the metal powder inside the molding cavity 3 can fall into the powder return bin 5 to avoid scattering to the outside.

[0032] See also Figure 1 A multi-axis adjustment frame 11 is installed on the top of the box body 1, and a laser 12 is installed on the surface of the multi-axis adjustment frame 11.

[0033] During specific use: the top of the box 1 drives the laser 12 to adjust a certain position through the multi-axis adjustment frame 11, and the metal powder is sintered by the laser 12, and finally melted and deposited layer by layer into components to realize printing of the object.

[0034] See also Figure 1 A control panel 13 is installed on the outer wall of the box body 1, and the electric push rod 64, the stepper motor 74, the powder spreading machine 9 and the laser 12 are all electrically connected to the control panel 13, and the control panel 13 is electrically connected to the external power supply.

[0035] During specific use: when the control panel 13 is connected to an external power source, the electric push rod 64, the stepper motor 74, the powder spreading machine 9 and the laser 12 are controlled to operate; when the control panel 13 is disconnected from the external power source, the electronic equipment stops operating.

[0036] When the printing of the object is completed and a large amount of metal powder is accumulated inside the molding cavity 3, the electric push rod 64 is controlled to drive the connecting plate 63 to move to the outside of the two sides of the molding cavity 3. The movement of the connecting plate 63 drives the baffle 62 to move out of the discharge port 61. At this time, the metal powder in the molding cavity 3 falls from the discharge port 61 to the powder return bin 5, avoiding the problem that the metal powder is pushed to the surface of the operating table 2 when the printing table 4 is raised, which is inconvenient to clean.

[0037] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for technical personnel in the field to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A 3D printing device, characterized in that: include: A box body (1), an operating table (2) is installed inside the box body (1), a molding cavity (3) is installed in the middle of the operating table (2), a printing table (4) is installed inside the molding cavity (3), and powder return bins (5) are placed on both sides of the molding cavity (3) inside the box body (1); A material discharge mechanism (6), the material discharge mechanism (6) comprising a material discharge port (61) opened on both sides of the molding cavity (3), a baffle (62) installed inside the material discharge port (61), a connecting plate (63) fixedly installed on the surface of the baffle (62), electric push rods (64) fixedly installed on both sides of the molding cavity (3), and a telescopic end of the electric push rod (64) fixedly connected to the connecting plate (63); A lifting mechanism (7), the lifting mechanism (7) comprising a support frame (71) fixedly mounted inside the box body (1), a rack (72) fixedly mounted on the surface and back of the support frame (71), a lifting frame (73) sleeved on the outside of the support frame (71), stepper motors (74) fixedly mounted on both sides of the lifting frame (73), a gear (75) fixedly mounted on the output end of the stepper motor (74), the gear (75) meshingly connected with the rack (72), and a printing table (4) fixedly mounted on the top of the lifting frame (73).

2. A 3D printing device according to claim 1, characterized in that: Slide rails (76) are fixedly installed on both sides of the support frame (71), and sliders (77) are fixedly installed on both sides of the inner wall of the lifting frame (73), and the sliders (77) are slidably installed on the surfaces of the slide rails (76).

3. A 3D printing device according to claim 1, characterized in that: Limiting teeth (78) are fixedly mounted on both ends of the rack (72).

4. A 3D printing device according to claim 1, characterized in that: Feed bins (8) are installed on both sides of the inner wall of the box body (1), and a powder spreading machine (9) is slidably installed at the bottom of the feed bin (8).

5. A 3D printing device according to claim 1, characterized in that: The surface of the operating table (2) is provided with return troughs (10) corresponding to the material supply bin (8) on both sides thereof, the powder return bin (5) is arranged at the bottom of the return trough (10), and one end of the powder return bin (5) extends to the bottom of the molding cavity (3).

6. A 3D printing device according to claim 4, characterized in that: A multi-axis adjustment frame (11) is installed on the top of the box (1), and a laser (12) is installed on the surface of the multi-axis adjustment frame (11).

7. A 3D printing device according to claim 6, characterized in that: A control panel (13) is installed on the outer wall of the box body (1); the electric push rod (64), the stepper motor (74), the powder spreading machine (9) and the laser (12) are all electrically connected to the control panel (13); and the control panel (13) is electrically connected to an external power supply.

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