A rapid prototyping 3D printing device

Abstract

This invention discloses a rapid prototyping 3D printing device, relating to the field of 3D printing technology. It includes a printing frame and a feeding box fixedly installed at the top rear of the frame. A printing assembly is slidably installed inside the printing frame. A forming mechanism is located at the lower interior of the printing frame, including a forming platform, and forming bushings are provided on both sides of the forming platform. A forming cooling plate is rotatably mounted inside the forming bushing via torsion springs. A separation mechanism is located at the lower interior of the printing frame, including a separation slide. This rapid prototyping 3D printing device achieves printing operations through the lifting and lowering of the printing assembly inside the printing frame in conjunction with the lifting forming platform. After printing, the forming cooling plate of the forming bushing rotates and cools the printed part, while the wavy separation slide moves, causing the flexible forming plate to deform, thereby pulling and separating the printed part.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, specifically to a rapid prototyping 3D printing device. Background Technology

[0002] 3D printing equipment refers to digital manufacturing tools based on the principle of additive manufacturing. It transforms a three-dimensional digital model in a computer into a real physical entity by layering materials. Unlike traditional "subtractive manufacturing" (such as cutting and drilling), 3D printing belongs to the "additive" process and can efficiently and flexibly manufacture parts with complex structures. It is widely used in industrial design, medical, construction, education, aerospace and other fields.

[0003] Application CN213137828U discloses a rapid prototyping device for 3D printing medical simulation models. The 3D printer body includes a frame, and a printing table is set at the bottom of the frame. The controller controls the extension of the telescopic rod located at the left front end. During the adjustment process, the display screen shows the tilt angle in real time. When the 3D printer body is adjusted to be horizontal, the controller receives a signal and controls the telescopic rod to stop working, thereby adjusting the entire device to be horizontal, which facilitates subsequent printing work and improves printing quality.

[0004] Application CN119748873A discloses a rapid prototyping device for customized insoles. During the process of the scraper peeling the insole from the printing platform, the pressure blocks on both sides alternately press the insole, which can ensure that the scraper peels the insole smoothly from the printing platform, and prevent the insole from popping up, curling or shifting due to the sudden peeling of the insole from the most firmly attached part to the printing platform, thus ensuring the normal transfer of the insole.

[0005] However, the aforementioned rapid prototyping 3D printing equipment still has the following problems in actual use: when the printed parts are hard separated by a scraper after they are formed, some parts of the printed parts cannot be cooled down quickly due to the excessive accumulation of additives. As a result, the parts of the printed parts are prone to deformation and misalignment during hard scraping. At the same time, some of the discharge nozzle components have their own cooling mechanisms, which simultaneously cool the additives during the printing process, which in turn affects the strength and stability of the printed parts.

[0006] Therefore, we propose a rapid prototyping 3D printing device to address the aforementioned problems. Summary of the Invention

[0007] The purpose of this invention is to provide a rapid prototyping 3D printing device to solve the problem that in existing 3D printing devices, when the printed parts are hard separated by a scraper after forming, some parts of the printed parts cannot be cooled quickly due to excessive additive buildup, which easily causes deformation and misalignment of the printed parts during hard scraper separation. At the same time, some of the discharge nozzle components have built-in cooling mechanisms to cool the additives during the printing process, which in turn affects the strength and stability of the printed parts.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a rapid prototyping 3D printing device, comprising a printing frame and a feeding box fixedly installed at the top rear of the frame, wherein a printing assembly is slidably installed inside the printing frame, and the printing assembly melts the additive material inside the feeding box for molding and printing; further comprising: A forming mechanism is provided inside the lower part of the printing frame, and the forming mechanism includes a forming platform, and forming bushings are provided on both the left and right sides of the forming platform. The forming liner has a forming cooling plate installed inside by a torsion spring at equal intervals, and cooling nozzles are installed at equal intervals on the inner side of the forming cooling plate. A separation mechanism is provided at the lower interior of the printing frame, and the separation mechanism includes a separation slide, which is distributed in a wave-like structure with up-and-down undulations.

[0009] Preferably, the forming mechanism includes a forming liner fixedly installed on the lower left and right sides inside the printing frame, and the top of the forming liner is provided with transmission gears at equal intervals. The transmission gears are fixedly installed at the top rotating shaft of the forming cooling plate, and the outer side of the transmission gears is meshed with a transmission rack. At the same time, the rear end of the transmission rack is fixedly connected to the front telescopic part of the hydraulic telescopic device.

[0010] Preferably, the forming mechanism includes a hydraulic telescoping device fixedly installed at the rear top of the forming liner, and the upper end of the forming liner is provided with an air supply pipe, the rear end of which is connected to the forming air pump, and the forming air pump is fixedly installed at the rear of the printing frame. Meanwhile, the front end of the air supply pipe is connected to a cooling nozzle inside the forming cooling plate for auxiliary cooling and rapid forming after printing.

[0011] Preferably, the forming mechanism includes a lifting screw, which is rotatably mounted at the rear center of the printing frame via a bearing. Lifting slide rods are fixedly installed on both the left and right rear sides of the printing frame. The lifting screw is threaded through and connected to the middle of the rear end of the forming platform. The forming platform and the lifting slide rod slide through each other to adjust the height of the forming platform during printing.

[0012] Preferably, the separation mechanism includes a flexible forming plate, which is fixedly installed on the top surface of the forming platform. Separation crossbars are fixedly installed at equal intervals at the bottom end of the flexible forming plate. The equally spaced separation crossbars slide through the outside of the bottom surface of the forming platform, and the equally spaced separation crossbars correspond to different undulations of the separation carriage.

[0013] Preferably, the separation mechanism includes an abutting inclined block, which is fixedly installed on the left and right sides of the bottom surface behind the molding platform. A separation inclined block is provided below the abutting inclined block, and the separation inclined block is in contact with the inclined surface of the bottom surface of the abutting inclined block through the inclined surface of the top surface, so as to squeeze the separation inclined block to slide forward when the abutting inclined block follows the molding platform down.

[0014] Preferably, the separation mechanism includes an elastic telescopic rod, the front end of which is fixedly connected to the rear end of the left and right separation ramps, and the rear end of which is fixedly connected to the rear outer wall of the printing frame. In the initial state, the separation ramps are close to the rear of the printing frame, and after sliding forward, the elastic telescopic rod is stretched to have elastic potential energy.

[0015] Preferably, the separation mechanism includes positioning slide rods, the upper ends of which are symmetrically mounted on the bottom surface of the separation carriage, and the lower ends of the symmetrically distributed positioning slide rods slide through the bottom of the printing frame. The rear end of the separation carriage is fixedly connected to the front outer wall of the left and right separation inclined blocks.

[0016] Preferably, the separation mechanism includes a separation slide that engages with the separation crossbar after it descends. The undulating wave-like structure of the separation slide engages with the equally spaced separation crossbars in a staggered manner, and the separation crossbars cause the flexible molding plate connected to the upper end to deform, thereby pulling and separating the molded object that is stuck on top.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This rapid prototyping 3D printing equipment achieves the printing operation by using the printing components inside the printing frame in conjunction with the lifting molding platform. After printing is completed, the molding cooling plate of the molding bushing rotates and cools the part, while the wave-shaped separation slide moves to deform the flexible molding plate, so as to pull and separate the printed part. The specific details are as follows: 1. The feeding box conveys additive materials to the printing components inside the printing frame. After melting, the materials are sprayed through the nozzles of the printing components. In conjunction with the rotation of the lifting screw inside the printing frame, the forming platform and the flexible forming plate are raised. The molten material is then received by the flexible forming plate, and the printing components move to achieve the forming process of the printed parts.

[0018] 2. The forming platform and flexible forming plate move downwards to the part removal position. The hydraulic telescoping device at the top of the forming bushing drives the transmission rack of the front telescoping part to slide forward. The transmission rack drives the meshing transmission gear and the forming cooling plate to rotate. When the transmission rack continues to move and disengages from the transmission gear, the forming cooling plate connected by the torsion spring resets and rotates in the opposite direction. At the same time, the forming air pump blows air to the air supply pipe and the cooling nozzle. The cooling nozzle is driven by the forming cooling plate to rotate at different angles so as to spray cooling air to the printed part to assist in its cooling and forming.

[0019] 3. The forming platform moves synchronously with the bottom contacting inclined block to contact the separating inclined block. As it slides downward, the inclined surface of the contacting inclined block presses against the inclined surface of the separating inclined block, thereby causing the separating inclined block to stretch the elastic telescopic rod forward and extend it. This allows the separating inclined block to drive the wave-shaped separating slide forward, assisting in the separation of the printed part and the flexible forming plate.

[0020] Furthermore, the separating crossbars abut against the upper surface of the separating carriage at different heights, causing the separating crossbars to be staggered at different heights. This causes the flexible molding plate to deform and move undulatingly against the equally spaced separating crossbars as the separating carriage moves, thereby causing the flexible molding plate to bend variably to pull and separate the printed parts attached above. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the molding platform of the present invention; Figure 3 This is a schematic diagram of the structure of the flexible molding plate of the present invention after deformation; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the initial position of the separating carriage according to the present invention; Figure 6 This is a schematic diagram of the structure of the present invention after the carriage and the sliding mechanism are separated; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the installation structure of the printing frame and the forming liner of the present invention; Figure 9 This is a schematic diagram of the structure of the cooling plate after it has been rotated according to the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point C.

[0022] In the diagram: 1. Printing frame; 2. Feeding box; 3. Printing assembly; 4. Forming platform; 5. Forming liner; 6. Forming cooling plate; 7. Cooling nozzle; 8. Separation slide; 9. Transmission gear; 10. Transmission rack; 11. Hydraulic telescopic device; 12. Air supply pipe; 13. Forming air pump; 14. Lifting screw; 15. Lifting slide bar; 16. Flexible forming plate; 17. Separation crossbar; 18. Anti-collision wedge; 19. Separation wedge; 20. Elastic telescopic rod; 21. Positioning slide bar. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1-10 The present invention provides the following technical solution: Example 1: To address the problems encountered by existing 3D printing equipment during the forming process, this example discloses the following technical solution: a rapid prototyping 3D printing device, comprising a printing frame 1 and a feeding box 2 fixedly installed at the top rear of the frame 1, wherein a printing component 3 is slidably installed inside the printing frame 1, and the printing component 3 melts the additive material inside the feeding box 2 for forming and printing; a forming mechanism is provided at the lower interior of the printing frame 1, and the forming mechanism includes a forming platform 4, and forming bushings 5 ​​are provided on both the left and right sides of the forming platform 4; wherein, forming cooling plates 6 are rotatably installed inside the forming bushings 5 ​​by means of torsion springs at equal intervals, and cooling nozzles 7 are equidistantly installed on the inner side of the forming cooling plates 6.

[0025] The forming mechanism includes a lifting screw 14, which is rotatably mounted at the rear center of the printing frame 1 via a bearing. Lifting slide rods 15 are fixedly installed on both the left and right rear sides of the printing frame 1. The lifting screw 14 is threaded through and connected to the rear center of the forming platform 4. The forming platform 4 and the lifting slide rods 15 slide through each other to adjust the height of the forming platform 4 during printing.

[0026] like Figure 1 , Figure 5As shown, the printing frame 1 conveys additive materials to the printing assembly 3 through the top feeding box 2. The printing assembly 3 melts the additive materials and then conveys them downward through the nozzle. The molten material accumulates on the upper surface of the flexible molding plate 16 as the printing assembly 3 moves, thereby forming a printed part of the required specifications and shape. At the same time, the lifting screw 14 behind the printing frame 1 rotates. The molding platform 4, which is threadedly connected to the lifting screw 14, is limited by the lifting slide 15. This allows the rotating lifting screw 14 to drive the threaded molding platform 4 and the flexible molding plate 16 to adjust their height, so that the printing assembly 3 can perform the required 3D printing operation.

[0027] Example 2: To address the problems encountered by existing 3D printing equipment during the forming process, this example discloses the following technical solution: The forming mechanism includes a forming bushing 5 fixedly installed on the lower left and right sides inside the printing frame 1. The top of the forming bushing 5 is provided with transmission gears 9 at equal intervals, and the transmission gears 9 are fixedly installed at the top pivot of the forming cooling plate 6. A transmission rack 10 is meshed with the outer side of the transmission gears 9, and the rear end of the transmission rack 10 is fixedly connected to the front telescopic part of the hydraulic telescoping device 11. The forming mechanism includes a hydraulic telescoping device 11 fixedly installed behind the top of the forming bushing 5. An air supply pipe 12 is provided at the upper end of the forming bushing 5, and the rear end of the air supply pipe 12 is connected to a forming air pump 13. The forming air pump 13 is fixedly installed behind the printing frame 1, and the front end of the air supply pipe 12 is connected to a cooling nozzle 7 inside the forming cooling plate 6, used for auxiliary cooling and rapid forming after printing.

[0028] like Figures 8-10 As shown, after the printed part inside the printing frame 1 is formed, the lifting screw 14 drives the threadedly connected forming platform 4 and flexible forming plate 16 to move downward to the part removal position. When the flexible forming plate 16 moves the printed part downward, the hydraulic telescoping device 11 installed on the top of the forming bushing 5 drives the transmission rack 10 of the front telescoping part to slide forward. The transmission rack 10 drives the meshing transmission gear 9 and the forming cooling plate 6 to rotate. When the transmission rack 10 continues to move and disengages from the transmission gear 9, the forming cooling plate 6 connected by the torsion spring resets and rotates in the opposite direction, thereby cooling and quickly forming printed parts of different specifications and shapes.

[0029] Furthermore, the forming air pump 13 installed behind the printing frame 1 operates to supply air into the through-connected air supply pipe 12 and blow it through the cooling nozzle 7 connected to the air supply pipe 12. The cooling nozzle 7 is driven by the forming cooling plate 6 to rotate at different angles so as to spray cooling air to the printed part to assist its cooling and forming.

[0030] Example 3: To solve the problems of existing 3D printing equipment during molding, this example discloses the following technical solution: A separation mechanism is provided at the lower interior of the printing frame 1, and the separation mechanism includes a separation slide 8, which is distributed in a wave-like structure with up-and-down undulations; the separation mechanism includes a flexible molding plate 16, which is fixedly installed on the top surface of the molding platform 4, and separation crossbars 17 are fixedly installed at equal intervals at the bottom end of the flexible molding plate 16, and the equal-distance separation crossbars 17 are slidably disposed outside the bottom surface of the molding platform 4, and the equal-distance separation crossbars 17 correspond to different undulation positions of the separation slide 8.

[0031] The separation mechanism includes a contacting inclined block 18, which is fixedly installed on the left and right sides of the bottom surface behind the forming platform 4. A separation inclined block 19 is provided below the contacting inclined block 18. The separation inclined block 19 is in contact with the inclined surface of the bottom surface of the contacting inclined block 18 through the inclined surface of its top surface. This is used to squeeze the separation inclined block 19 to slide forward when the contacting inclined block 18 descends with the forming platform 4. The separation mechanism includes an elastic telescopic rod 20, the front end of which is fixedly connected to the rear end of the separation inclined blocks 19 on the left and right sides. The rear end of which is fixedly connected to the rear outer wall of the printing frame 1. In the initial state, the separation inclined block 19 is close to the rear of the printing frame 1. After sliding forward, the elastic telescopic rod 20 is stretched to have elastic potential energy.

[0032] like Figures 6-7 As shown, when the forming platform 4 and the flexible forming plate 16 move the printed part downwards, the contacting inclined block 18 at the rear end of the forming platform 4 moves synchronously and contacts the top inclined surface of the separating inclined block 19. As it continues to slide downwards, the inclined surface of the contacting inclined block 18 presses the inclined surface of the separating inclined block 19, thereby causing the separating inclined block 19 to stretch the elastic telescopic rod 20 forward and slide forward, so that the separating inclined block 19 can drive the wave-shaped separating slide 8 to slide forward, assisting the printed part and the flexible forming plate 16 to separate from each other.

[0033] Example 4: To solve the problems of existing 3D printing equipment during molding, this example discloses the following technical solution: The separation mechanism includes a positioning slide rod 21, and the upper end of the positioning slide rod 21 is symmetrically installed on the bottom surface of the separation slide 8. The lower end of the symmetrically distributed positioning slide rod 21 slides through the bottom of the printing frame 1. The rear end of the separation slide 8 is fixedly connected to the front outer wall of the left and right separation inclined blocks 19. The separation slide 8 included in the separation mechanism is used to abut after the separation crossbar 17 descends. The wave-like structure of the separation slide 8 moves in a staggered manner against the equally distributed separation crossbar 17. The separation crossbar 17 drives the flexible molding plate 16 connected at the upper end to deform, which is used to pull and separate the molded object attached above.

[0034] like Figures 5-6 As shown, when the molding platform 4 drives the flexible molding plate 16 to slide downwards, the separation crossbars 17 on the bottom surface of the flexible molding plate 16 abut against the upper surface of the separation carriage 8. As it continues to descend, the equally distributed separation crossbars 17 contact different height areas of the separation carriage 8, thereby causing the separation crossbars 17 to be staggered at different heights. This causes the flexible molding plate 16 to deform and move undulatingly against the equally distributed separation crossbars 17 as the separation carriage 8 moves. This causes the flexible molding plate 16 to bend variably, so as to pull and separate the printed parts that are stuck on it.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rapid prototyping 3D printing device, comprising a printing frame (1) and a feeding box (2) fixedly installed at the top rear of the frame (1), wherein a printing component (3) is slidably installed inside the printing frame (1), and the printing component (3) melts the additive material inside the feeding box (2) and then performs molding and printing. characterized in that Also includes: The printing frame (1) has a forming mechanism located at its lower interior, and the forming mechanism includes a forming platform (4), and forming bushings (5) are provided on both the left and right sides of the forming platform (4). The molding liner (5) has a molding cooling plate (6) installed inside by a torsion spring at equal intervals, and cooling nozzles (7) are installed at equal intervals on the inner side of the molding cooling plate (6). The printing frame (1) is provided with a separation mechanism at its lower interior, and the separation mechanism includes a separation slide (8), and the separation slide (8) is distributed in a wave-like structure with up-and-down undulations. The separation mechanism includes a flexible forming plate (16), which is fixedly installed on the top surface of the forming platform (4). Separation crossbars (17) are fixedly installed at equal intervals at the bottom end of the flexible forming plate (16). The separation crossbars (17) are slidably installed outside the bottom surface of the forming platform (4). At the same time, the separation crossbars (17) are slidably installed at equal intervals and correspond to different undulation positions of the separation slide (8). The separation mechanism includes an abutting inclined block (18), which is fixedly installed on the left and right sides of the bottom surface behind the molding platform (4). A separation inclined block (19) is provided below the abutting inclined block (18), and the separation inclined block (19) is in contact with the inclined surface of the bottom surface of the abutting inclined block (18) through the inclined surface of the top surface, so as to squeeze the separation inclined block (19) to slide forward when the abutting inclined block (18) descends with the molding platform (4). The separation mechanism includes an elastic telescopic rod (20), and the front end of the elastic telescopic rod (20) is fixedly connected to the rear end of the left and right separation inclined blocks (19), and the rear end of the elastic telescopic rod (20) is fixedly connected to the rear outer wall of the printing frame (1). In the initial state, the separation inclined block (19) is close to the rear of the printing frame (1), and after sliding forward, it stretches the elastic telescopic rod (20) to have elastic potential energy. The separation mechanism includes a positioning slide rod (21), and the upper end of the positioning slide rod (21) is symmetrically installed on the bottom surface of the separation slide (8), and the lower end of the symmetrically distributed positioning slide rod (21) slides through the bottom of the printing frame (1), and the rear end of the separation slide (8) is fixedly connected to the front outer wall of the left and right separation inclined blocks (19). The separation mechanism includes a separation slide (8) for contacting the separation crossbar (17) after it descends. The undulating wave-like structure of the separation slide (8) contacts the equally spaced separation crossbars (17) and moves in a staggered manner. The separation crossbars (17) drive the flexible molding plate (16) connected to the upper end to deform, which is used to pull and separate the molded object stuck on the upper end.

2. The rapid prototyping 3D printing equipment according to claim 1, characterized in that: The molding mechanism includes a molding liner (5) which is fixedly installed on the lower left and right sides inside the printing frame (1). The top of the molding liner (5) is provided with transmission gears (9) at equal intervals. The transmission gears (9) are fixedly installed at the top shaft of the molding cooling plate (6). The outer side of the transmission gears (9) is meshed with a transmission rack (10). At the same time, the rear end of the transmission rack (10) is fixedly connected to the front telescopic part of the hydraulic telescopic device (11).

3. The rapid prototyping 3D printing equipment according to claim 2, characterized in that: The forming mechanism includes a hydraulic telescoping device (11) fixedly installed at the rear of the top of the forming liner (5), and the upper end of the forming liner (5) is provided with an air supply pipe (12), and the rear end of the air supply pipe (12) is connected to the forming air pump (13), and the forming air pump (13) is fixedly installed at the rear of the printing frame (1), while the front end of the air supply pipe (12) is connected to the cooling nozzle (7) inside the forming cooling plate (6) for auxiliary cooling and rapid forming after printing.

4. The rapid prototyping 3D printing equipment according to claim 3, characterized in that: The forming mechanism includes a lifting screw (14), which is rotatably mounted at the rear center of the printing frame (1) via a bearing. Lifting slide rods (15) are fixedly installed on both the left and right rear sides of the printing frame (1). The lifting screw (14) is threaded through and connected to the middle of the rear end of the forming platform (4). At the same time, the forming platform (4) and the lifting slide rods (15) slide through each other to adjust the height of the forming platform (4) during the printing operation.

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