Additive manufacturing 3D printer

Abstract

The utility model discloses an additive manufacturing 3D printer, and relates to the field of 3D printing equipment, the additive manufacturing 3D printer comprises a printer body and a heating device, the lower part of the heating device is fixedly provided with a bottom plate, one side of the bottom plate is fixedly provided with a micro servo motor, the output end of the micro servo motor is fixedly provided with a first gear, and one side of the first gear is engaged with a second gear; a rotating shaft rotationally connected with the bottom plate is fixedly arranged in the middle of the second gear in a penetrating mode, a rotating disc is fixedly connected to one side of the rotating shaft, a plurality of sprayers are arranged on the outer side of the rotating disc in a surrounding mode, two symmetrically-arranged vertical fixing rods are fixedly arranged on the lower portion of one side of the bottom plate, and a pressing opening and closing mechanism is arranged on the lower portions of the two vertical fixing rods; the pressing opening and closing mechanism comprises an upper round cover fixedly arranged on the lower portion of the vertical fixing rod, an L-shaped sliding groove is formed in the middle of the side wall of the upper round cover, an L-shaped sliding rod is slidably arranged in the L-shaped sliding groove, and a lower round cover is fixedly arranged at the bottom of the L-shaped sliding rod. The nozzle can be replaced according to different needs, residual resin in the nozzle can be cleaned, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of 3D printing devices, and particularly to an additive manufacturing 3D printer. Background Art

[0002] A 3D printer, also known as a three-dimensional printer, is a rapid prototyping process that uses a layer-by-layer stacking method to create a three-dimensional model. Its operation process is similar to that of a traditional printer, except that a traditional printer prints ink on paper to form a two-dimensional flat drawing, while a three-dimensional printer stacks materials such as liquid photosensitive resin materials, molten plastic filaments, and gypsum powder layer by layer through methods such as spraying adhesives or extrusion to form a three-dimensional entity.

[0003] In existing 3D printing devices, basically a single nozzle is used. When printing objects with different thicknesses, it is necessary to manually replace the nozzle, which will waste a lot of time, affect production efficiency, and the replaced nozzle needs to be manually cleaned of the residual resin inside. Utility Model Content

[0004] In order to improve the ability to replace the nozzle according to different needs and clean the residual resin inside the nozzle, and to improve the production efficiency problem, this application provides an additive manufacturing 3D printer.

[0005] An additive manufacturing 3D printer provided by this application adopts the following technical solutions:

[0006] An additive manufacturing 3D printer includes a printer body and a heating device, and is characterized in that: a bottom plate is fixedly provided at the lower part of the heating device, a micro servo motor is fixedly provided on one side of the bottom plate, a first gear is fixedly provided at the output end of the micro servo motor, a second gear is meshed on one side of the first gear, a rotating shaft rotatably connected to the bottom plate is fixedly penetrated through the middle of the second gear, a turntable is fixedly connected to one side of the rotating shaft, a plurality of nozzles are arranged around the turntable, and two symmetrically arranged vertical fixing rods are fixedly provided at the lower part of one side of the bottom plate, and a pressing opening and closing mechanism is arranged at the lower part of the two vertical fixing rods;

[0007] The pressing opening and closing mechanism includes an upper round cover fixedly provided at the lower part of the vertical fixing rod, an L-shaped sliding groove is opened in the middle of the side wall of the upper round cover, an L-shaped sliding rod is slidably arranged inside the L-shaped sliding groove, a lower round cover is fixedly provided at the bottom of the L-shaped sliding rod, a sealing ring is fixedly provided in the middle of the inner side of the lower round cover, and a sealing plug is clamped on one side of the sealing ring.

[0008] By adopting the above technical solution, the output end of the micro servo motor can drive the first gear and the second gear to rotate, thereby driving the rotating shaft and the turntable to rotate together, so that the nozzle can be replaced when the turntable rotates, and the upper circular cover and the lower circular cover can slide against each other through the L-shaped slide groove and the L-shaped slide rod to achieve opening and closing, and the sealing ring and the sealing plug can achieve fitting sealing and separation to open the channel.

[0009] Preferably, a heat-conducting ring is fixedly provided through one side of the bottom plate, and a connecting block capable of being clamped with the nozzle is fixedly provided at the lower part of the heat-conducting ring.

[0010] By adopting the above technical solution, the heat-conducting ring can transfer heat to the connecting block, and the connecting block then transfers the heat to the nozzle.

[0011] Preferably, a semicircular card slot is provided at the lower portion of one side of the connecting block, a semicircular card is connected to the inner cavity of the semicircular card slot, the lower portion of the semicircular card is slidably arranged in the inner cavity of the lifting groove, and the lifting groove is provided on one side of the upper outer ring of the turntable.

[0012] By adopting the above technical solution, the semicircular clamp and the semicircular clamp groove can realize the limiting between the connecting block and the nozzle, and the lifting groove can accommodate the semicircular clamp to move up and down in the lifting groove.

[0013] Preferably, the push-to-open and close mechanism further comprises a limiting slide groove provided in the middle of the side wall of the lower circular cover, and a second spring having one end fixedly connected to the upper circular cover is fixed inside the limiting slide groove.

[0014] By adopting the above technical solution, the second spring can help push out the lower round cover, so that the lower round cover is separated from the upper round cover, and then the lower part of the lower round cover can be inserted into the nozzle.

[0015] Preferably, a plurality of balls capable of rolling on the surface of the turntable are arranged around the lower portion of the lower circular cover.

[0016] By adopting the above technical solution, the ball bearings can help the entire push-open-and-close mechanism to slide on the turntable, and reduce the friction between the lower circular cover and the turntable, thereby avoiding the generation of loud noise.

[0017] Preferably, a fixing plate is fixedly provided in the middle of the upper surface of the sealing plug, and a fixing cross bar is fixedly provided through the upper part of the fixing plate, with both ends fixedly connected to the inner wall of the upper circular cover.

[0018] By adopting the above technical solution, the fixing plate cooperates with the fixing cross bar to firmly fix the sealing plug in the inner cavity of the lower circular cover.

[0019] Preferably, a negative pressure suction pipe is fixedly provided through the middle of the upper surface of the upper circular cover, and one end of the negative pressure suction pipe is fixedly provided through one side of the bottom plate.

[0020] By adopting the above technical solution, the connection between the negative pressure suction pipe and the upper round cover enables the negative pressure suction pipe to communicate with the inner cavities of the upper round cover and the lower round cover, allowing the negative pressure suction pipe to suck out the resin in the nozzle through the upper round cover and the lower round cover.

[0021] Preferably, a first spring fixedly connected to the semi-circular clamp is provided in the inner cavity of the lifting groove.

[0022] By adopting the above technical solution, the first spring can push the semi-circular clamp out of the lifting groove when the semi-circular clamp loses the extrusion of the connecting block and assist when the semi-circular clamp is engaged with the semi-circular clamping groove.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By rotating the output end of the micro servo motor, the first gear is driven to rotate. The first gear drives the second gear meshing with it to rotate, and the second gear drives the rotating shaft to rotate together. At the same time, the rotating shaft will drive the turntable to rotate. At this time, through the set program, the turntable will rotate the required nozzle to the lower part of the connecting block, making the inner cavity of the connecting block completely dock with the inner cavity of the nozzle. When the turntable drives the nozzle to move to the connecting block, the first spring pops out the semi-circular clamp, enabling the semi-circular clamp to be limited by the semi-circular clamping groove, making the connection between the connecting block and the nozzle closer and preventing it from separating randomly, eliminating the need for manual replacement of the nozzle.

[0025] 2. By pushing out the lower round cover with the second spring, the lower round cover is clamped with the nozzle. At this time, the sealing ring is separated from the sealing plug, allowing the suction force in the negative pressure suction pipe to enter the nozzle through the channel between the sealing ring and the sealing plug, sucking out the residual resin in the nozzle and preventing the nozzle from being blocked by hardened resin, which may affect the next use. Description of the Drawings

[0026] Figure 1 is the overall schematic diagram of the present application;

[0027] Figure 2 is the schematic diagram of the heating device of the present application;

[0028] Figure 3 is the distribution diagram of the overall device of the present application;

[0029] Figure 4 is the enlarged view of the position of the semi-circular clamp of the present application;

[0030] Figure 5 is the position diagram of the pressing and opening / closing mechanism of the present application;

[0031] Figure 6 is the cross-sectional view of the pressing and opening / closing mechanism of the present application;

[0032] Figure 7 is the enlarged view of the pressing and opening / closing mechanism of the present application.

[0033] Reference numerals: 1, body; 2, heating device; 3, bottom plate; 4, micro servo motor; 5, first gear; 6, second gear; 7, rotating shaft; 8, turntable; 9, nozzle; 10, heat conducting ring; 11, connecting block; 12, semi-circular clamping groove; 13, semi-circular clamp; 14, lifting groove; 15, first spring;

[0034] 16, pressing opening and closing mechanism; 161, upper round cover; 162, L-shaped sliding groove; 163, L-shaped sliding rod; 164, lower round cover; 165, second spring; 166, limiting sliding groove; 167, sealing ring; 168, sealing plug; 169, ball;

[0035] 17, fixing plate; 18, fixing cross bar; 19, negative pressure suction pipe; 20, vertical fixing rod. Detailed implementation mode

[0036] The following will further elaborate on this application in conjunction with the attached Figures 1 - 7 drawings.

[0037] The embodiment of this application discloses an additive manufacturing 3D printer.

[0038] Referring to Figure 1 , Figure 2 , Figure 3 , an additive manufacturing 3D printer includes the body 1 of the 3D printer and a heating device 2 located in the upper part of the printer cavity. The lower part of the heating device 2 is fixedly connected to the upper part of the bottom plate 3. The middle part of the upper surface of the side of the bottom plate 3 away from the heating device 2 is fixedly connected to the fixed seat of the micro servo motor 4. The output end of the micro servo motor 4 is fixedly connected to the first gear 5 through a coupling. One side of the first gear 5 is meshed with the second gear 6. The middle part of the second gear 6 is fixedly penetrated by one end of the rotating shaft 7. The end of the rotating shaft 7 fixedly penetrating the second gear 6 also movably penetrates the bottom plate 3 and is rotatably connected to the bottom plate 3. The surface of the rotating shaft 7 on the side away from the second gear 6 is fixedly connected to the middle part of the upper surface of the turntable 8. Three through holes are circumferentially formed on the outer side of the turntable 8. Three nozzles 9 with different nozzle diameters are fixedly arranged in each through hole. The nozzles 9 can be set as required. Two or more are the best.

[0039] After the micro servo motor 4 is powered on, the output end rotates, driving the first gear 5 connected through the coupling to rotate. The rotation of the first gear 5 can drive the meshed second gear 6 to rotate accordingly. When the second gear 6 rotates, it can drive the rotating shaft 7 to rotate together, and at the same time, it can drive the turntable 8 fixedly connected to the rotating shaft 7 to rotate together. The three nozzles 9 fixedly connected to the lower part of the turntable 8 can rotate with the turntable 8, and different nozzles of different sizes can be replaced according to the needs during printing.

[0040] It should be noted that the micro servo motor 4 needs to be controlled by the PLC to make the rotation of the micro servo motor 4 drive the nozzle 9 more precisely, so that the rotation angle of the three nozzles 9 each time is exactly 120°, and it can be accurately docked with the connecting block 11.

[0041] Refer to Figure 3 、 Figure 4 , the middle part of the upper surface of the bottom plate 3 on the side far from the micro servo motor 4 is fixedly penetrated by the heat conducting ring 10, and the lower outer surface of the heat conducting ring 10 is fixedly connected to the upper surface of the inner cavity of the connecting block 11, and the lower part of the inner cavity of the connecting block 11 can be accurately docked with the nozzle 9. A semi-circular clamping groove 12 is opened on the lower surface of one side wall of the connecting block 11, and the inner cavity diameter of the semi-circular clamping groove 12 is the same as the diameter of the semi-circular clamp 13, so that the semi-circular clamping groove 12 can firmly clamp the semi-circular clamp 13. One end of the lower surface of the semi-circular clamp 13 is fixedly connected to one end of the first spring 15, and a circular protrusion is provided at the lower part of the semi-circular clamp 13, which can be used for limiting the upper contracted opening of the jacking groove 14 so that the semi-circular clamp 13 can slide in the inner cavity of the jacking groove 14 (as Figure 4 ) shown, and the jacking groove 14 is opened on one side of the outer ring of the upper surface of the turntable 8, and the opening position of the jacking groove 14 is close to the nozzle 9 side. At the same time, the jacking groove 14 is also set according to the number of nozzles 9 (as Figure 3 ) shown, and one end of the first spring 15 away from the semi-circular clamp 13 is fixedly connected to the bottom of the inner cavity of the jacking groove 14.

[0042] The heat conducting ring 10 is fixedly connected to the connecting block 11, and the connecting block 11 and the nozzle 9 can be accurately docked. Therefore, the inner cavities of the heat conducting ring 10, the connecting block 11 and the nozzle 9 can be communicated, so that the resin can enter the nozzle 9 through the heat conducting ring 10. When the nozzle 9 is docked with the connecting block 11, the semi-circular clamp 13 arranged on one side of the nozzle 9 just gets stuck in the semi-circular clamping groove 12 opened at the lower part of the connecting block 11 for limiting. However, when the semi-circular clamp 13 moves along with the turntable 8 and contacts the bottom of the connecting block 11, it will be squeezed downward. Then the semi-circular clamp 13 will squeeze the first spring 15, causing the semi-circular clamp 13 to retract into the jacking groove 14. When the semi-circular clamp 13 moves to the semi-circular clamping groove 12, due to the loss of the downward pressure, the first spring 15 will push the semi-circular clamp 13 upward until it is completely stuck with the semi-circular clamping groove 12.

[0043] It should be noted that the upper part of the heat conducting ring 10 is fixedly connected to the resin conveying pipe in the heating device 2, and the heat conducting ring 10 can transfer heat to the connecting block 11 and the nozzle 9.

[0044] Refer to Figure 5 、 Figure 6 、 Figure 7, the lower surface of one side of the bottom plate 3 is fixedly connected to the upper surfaces of two symmetrically arranged vertical fixing rods 20, and a pressing opening and closing mechanism 16 is arranged at the lower part of the two vertical fixing rods 20. The pressing opening and closing mechanism 16 includes an upper round cover 161 fixedly connected to the lower surface of the lower part of the vertical fixing rod 20. A smooth L-shaped sliding groove 162 is formed in the middle of the side wall of the upper round cover 161. The inner surface of the L-shaped sliding groove 162 is slidably arranged with the outer surface of the L-shaped sliding rod 163. The L-shaped sliding rod 163 is also arranged as a smooth plane. Grease can be applied between the L-shaped sliding groove 162 and the L-shaped sliding rod 163 for lubrication to improve the sliding efficiency and reduce the loss caused by friction. The bottom surface of the L-shaped sliding rod 163 is fixedly connected to the outer side of the upper surface of the lower round cover 164. A limiting sliding groove 166 is formed in the middle of the side wall of the lower round cover 164. The inner bottom surface of the limiting sliding groove 166 is fixedly connected to the lower part of the second spring 165. The upper end of the second spring 165 is fixedly connected to the bottom surface of the side wall of the upper round cover 161. The middle part of the inner surface of the lower round cover 164 is fixedly connected to the outer surface of the sealing ring 167. The inner surface of the sealing ring 167 is attached to and clamped with the outer surface of the sealing plug 168. The middle part of the upper surface of the sealing plug 168 is fixedly connected to the lower surface of the fixing plate 17. The upper part of the fixing plate 17 is fixedly penetrated by the fixed cross bar 18. The two end surfaces of the fixed cross bar 18 are fixedly connected to the inner walls of both sides of the upper round cover 161. The middle part of the upper surface of the upper round cover 161 is fixedly penetrated by the negative pressure suction pipe 19. The negative pressure suction pipe 19 is communicated with the inner cavity of the upper round cover 161. One end of the negative pressure suction pipe 19 away from the upper round cover 161 is fixedly penetrated through one side of the bottom plate 3. A return water bend is designed in the middle of the negative pressure suction pipe 19 to prevent the liquid sucked out from the upper round cover 161 from flowing back. The end of the negative pressure suction pipe 19 fixedly penetrating through the bottom plate 3 is connected to a suction device with sufficient suction, so that the entire pressing opening and closing mechanism 16 can suck out the liquid inside the nozzle 9. The lower surface of the lower round cover 164 is set as an inclined surface with a certain inclination angle inward. The lower round cover 164 and the nozzle 9 can be both clamped and separated. A number of rolling balls 169 are arranged in a ring on the lower surface of the lower round cover 164. The number of arrayed rolling balls 169 can help the entire pressing opening and closing mechanism 16 roll on the upper surface of the turntable 8.

[0045] The entire pressing and opening / closing mechanism 16 is located on the rotation path of the nozzle 9. When the nozzle 9 leaves the connecting block 11 and rotates 60°, it can be clamped with the upper dome 161. There is a distance on the outer surface of the upper end of the lower dome 164 for the side wall of the L-shaped chute 162 to move, so that the upper dome 161 and the lower dome 164 do not interfere with each other. And the inner wall of the side connected to the sealing ring 167 of the limit chute 166 just fits the inner wall of the upper dome 161, which can enable the L-shaped slide bar 163 to slide normally in the L-shaped chute 162. Under normal conditions, the lower dome 164 is pushed upward by the turntable 8, thereby compressing the second spring 165 and closing the sealing plug 168 and the sealing ring 167. When the lower dome 164 is clamped with the nozzle 9, due to the loss of the extrusion of the turntable 8, the lower dome 164 is ejected by the second spring 165. Since the diameter of the lower inclined surface of the lower dome 164 is smaller than the diameter of the nozzle 9, the inclined surface of the lower dome 164 can be inserted into the nozzle 9 for clamping. When the lower dome 164 is ejected and clamped with the nozzle 9, it can drive the sealing ring 167 to move downward together. When the sealing ring 167 moves downward, it disengages from the sealing plug 168, opening the channel between the sealing ring 167 and the sealing plug 168, thereby introducing the suction force in the negative pressure straw 19 into the nozzle 9 and sucking out the residual liquid in the nozzle 9 to prevent the liquid in the nozzle 9 from hardening and causing blockage.

[0046] It should be noted that in the above device, the body 1, the heating device 2, and the micro servo motor 4 are all prior arts, and their structural principles will not be elaborated here too much. And this device also needs to be connected and controlled with a PLC and a suction device. Since it is a prior art, it will not be elaborated here too much.

[0047] The implementation principle of an additive manufacturing 3D printer in an embodiment of this application is as follows: The staff turns on the printer body 1. When the nozzle 9 needs to be adjusted, the micro servo motor 4 is controlled to work through the plc. The output end of the micro servo motor 4 rotates, driving the first gear 5 to rotate. The first gear 5 drives the second gear 6 meshing with it to rotate, and the second gear 6 drives the rotating shaft 7 to rotate together. At the same time, the rotating shaft 7 will drive the turntable 8 to rotate. At this time, through the set program, the turntable 8 will rotate the required nozzle 9 to the lower part of the connecting block 11, so that the inner cavity of the connecting block 11 is completely docked with the inner cavity of the nozzle 9. When the turntable 8 drives the nozzle 9 to move to the connecting block 11, the first spring 15 ejects the semi-circular clamp 13, so that the semi-circular clamp 13 is limited by the semi-circular clamping groove 12, making the connection between the connecting block 11 and the nozzle 9 closer and not separating randomly. After switching the nozzle 9, printing can start.

[0048] When the nozzle 9 is replaced again, the turntable 8 will rotate the just-used nozzle 9. When it rotates to the 60° position, the lower circular cover 164 loses the extrusion of the turntable 8 and is pushed out by the second spring 165, so that the lower circular cover 164 is clamped with the nozzle 9. At this time, the sealing ring 167 is separated from the sealing plug 168, so that the suction force in the negative pressure suction pipe 19 enters the nozzle 9 through the channel between the sealing ring 167 and the sealing plug 168, sucking out the residual resin in the nozzle 9. After the resin is sucked out, the turntable 8 drives the nozzle 9 to continue rotating until the required nozzle 9 is docked with the connecting block 11 properly.

[0049] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An additive manufacturing 3D printer, comprising a printer body (1) and a heating device (2), characterized in that: A bottom plate (3) is fixedly provided at the lower part of the heating device (2). A micro servo motor (4) is fixedly provided on one side of the bottom plate (3). A first gear (5) is fixedly provided at the output end of the micro servo motor (4). A second gear (6) is meshed and arranged on one side of the first gear (5). A rotating shaft (7) rotatably connected to the bottom plate (3) is fixedly arranged through the middle of the second gear (6). A turntable (8) is fixedly connected to one side of the rotating shaft (7). A plurality of nozzles (9) are arranged around the outer side of the turntable (8). Two vertically fixed rods (20) which are symmetrically arranged are fixedly provided at the lower part on one side of the bottom plate (3). A pressing and opening / closing mechanism (16) is arranged at the lower parts of the two vertically fixed rods (20). The pressing and opening / closing mechanism (16) includes an upper round cover (161) fixedly provided at the lower part of the vertically fixed rod (20). An L-shaped sliding groove (162) is formed in the middle of the side wall of the upper round cover (161). An L-shaped sliding rod (163) is slidably arranged in the L-shaped sliding groove (162). A lower round cover (164) is fixedly provided at the bottom of the L-shaped sliding rod (163). A sealing ring (167) is fixedly provided in the middle of the inner side of the lower round cover (164). A sealing plug (168) is clamped on one side of the sealing ring (167).

2. The additive manufacturing 3D printer according to claim 1, wherein: A heat conducting ring (10) is fixedly arranged through one side of the bottom plate (3). A connecting block (11) which can be clamped with the nozzle (9) is fixedly provided at the lower part of the heat conducting ring (10).

3. The additive manufacturing 3D printer according to claim 2, characterized in that: A semi-circular clamping groove (12) is formed in the lower part on one side of the connecting block (11). A semi-circular clamp (13) is clamped in the inner cavity of the semi-circular clamping groove (12). The lower part of the semi-circular clamp (13) is slidably arranged in the inner cavity of a jacking groove (14). The jacking groove (14) is formed on one side of the outer ring at the upper part of the turntable (8).

4. An additive manufacturing 3D printer according to claim 1, characterized in that: The pressing and opening / closing mechanism (16) further includes a limiting sliding groove (166) formed in the middle of the side wall of the lower round cover (164). A second spring (165) with one end fixedly connected to the upper round cover (161) is fixedly arranged in the limiting sliding groove (166).

5. An additive manufacturing 3D printer according to claim 1, characterized in that: A plurality of balls (169) which can roll on the surface of the turntable (8) are arranged around the lower part of the lower round cover (164).

6. The additive manufacturing 3D printer according to claim 1, wherein: A fixing plate (17) is fixedly provided in the middle of the upper surface of the sealing plug (168). A fixing cross bar (18) with both ends fixedly connected to the inner wall of the upper round cover (161) is fixedly arranged through the upper part of the fixing plate (17).

7. An additive manufacturing 3D printer according to claim 1, characterized in that: A negative pressure suction pipe (19) is fixedly arranged through the middle of the upper surface of the upper round cover (161). One end of the negative pressure suction pipe (19) is fixedly arranged through one side of the bottom plate (3).

8. The additive manufacturing 3D printer according to claim 3, wherein: A first spring (15) fixedly connected to the semi-circular clamp (13) is fixedly arranged in the inner cavity of the jacking groove (14).

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