Three-dimensional printing device and printing method for tooth patch

Abstract

The three-dimensional printing device comprises a base, a lifting assembly is fixed to one side of the base, a connecting rod is fixed to the lifting assembly, a detachable lifting plate is fixed to one end of the connecting rod, an air floating platform is fixed to the base, a mounting frame is fixed to the air floating platform, and the mounting frame is fixed to the base. An LCD screen is embedded in the mounting frame, a detachable trough is fixed to the mounting frame, the trough is located over the LCD screen, the lifting plate is located over the trough, and three infrared distance measuring sensors are further arranged on the edge of the LCD screen and used for measuring the distance between the LCD screen and the lifting plate. The device adopts pull-up LCD photocuring three-dimensional printing, is small and flexible in equipment, low in cost, convenient and simple to use by medical staff, high in equipment precision and suitable for manufacturing tooth patches in hospitals, dental clinics and the like.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing devices, and particularly to a three-dimensional printing device and a printing method for dental veneers. Background Art

[0002] Dental veneer is a technology for tooth whitening and restoration. Dental veneer restoration is to paste a layer of material similar to the normal tooth color on the surface of discolored or defective teeth. It is especially suitable for young permanent teeth and anterior teeth with larger pulp cavities, achieving the effect of whitening or restoration. This technology has been widely used in stomatology and is quite popular among consumers. The current popular dental veneers can be divided into two types: resin veneers and porcelain veneers, which are relatively popular dental beauty methods at present. Veneers have the advantages of beautiful color, less tooth preparation, anti-liquid absorption, good biocompatibility, anti-wear, periodontal health care, and firm and reliable bonding. However, the production process of veneers is complex, the fitting requirements of veneers are high, and different patients need to be customized separately. Therefore, there are problems such as high production costs and low efficiency.

[0003] With the popularization of three-dimensional printing technology, three-dimensional printing has gradually been applied to the production of dental veneers, greatly reducing the production difficulty of dental veneers. Dental veneers need to be specially customized according to the periodontal shape of patients and are for personal use only, without the need for large-scale production in batches. Therefore, an industrial-grade three-dimensional printing device is not required, but a three-dimensional printing device with low cost, flexible and convenient use is needed. In addition, dental veneers require high fitting and high precision. Although the current small-scale fused three-dimensional printing devices on the market are flexible to use, they have a single material (zirconia material is the latest dental veneer material), obvious product texture, and limited precision. These are the existing problems. Summary of the Invention

[0004] In order to make up for the above deficiencies, the present invention provides a three-dimensional printing device and a printing method for dental veneers, adopting a three-dimensional printing method of LCD light curing. The device is small, flexible and convenient to use, and has high precision, which is suitable for the production of dental veneers in hospitals, dental clinics, etc.

[0005] The present invention is realized through the following technical solutions:

[0006] A three-dimensional printing device for dental veneers includes a base, characterized in that: a lifting assembly is fixed to one side of the base, a connecting rod is fixed on the lifting assembly, and a detachable lifting plate is fixed to one end of the connecting rod, an air floating platform is fixed on the base, and a mounting frame is fixed on the air floating platform, an LCD screen is embedded in the mounting frame, a detachable material trough is fixed on the mounting frame, the material trough is located directly above the LCD screen, and the lifting plate is located directly above the material trough; the lifting plate is in a step-like shape, and a connecting block is fixed to the upper part of the lifting plate, a square socket is opened on one side of the connecting block, a locking bolt is provided on the connecting block, and one end of the connecting rod is a square plug block corresponding to the square socket; three infrared ranging sensors are also provided at the edge of the LCD screen, and the upper end of the infrared ranging sensor is flush with the LCD screen, and the infrared ranging sensor is used to measure the distance between the LCD screen and the lifting plate.

[0007] Further optimized, the material trough includes a material frame and a release film, the release film is fixed at the bottom of the material frame, the cross-section of the material frame and the lifting plate is larger than the cross-section of the LCD screen, the cross-section of the material frame is larger than the cross-section of the lifting plate, and the release film is tightly attached to the LCD screen.

[0008] Further optimized, the three infrared ranging sensors are located within the downward projection of the lifting plate.

[0009] Further optimized, a light shield is placed on the base, a hot air blower is fixed on the base inside the light shield, and the heating temperature of the hot air blower is 30°C.

[0010] For further optimization, a pump casing is provided on the base, a bidirectional through-flow pump is provided in the pump casing, a steering seat is provided on the pump casing, and a pumping and exhaust pipe is connected to the steering seat.

[0011] Further optimized, the lifting assembly includes a lifting bracket, a slider, a screw and a servo motor, the lifting bracket is fixed on the base, the slider is slidably embedded in the lifting bracket, the lower end of the screw is rotatably connected to the base, the screw passes through the slider and is rotatably connected to the slider, the servo motor is fixed on the upper end of the lifting bracket, and the output end of the servo motor is fixedly connected to the upper end of the screw.

[0012] Further optimized, two rows of ultraviolet lamps are provided on the lifting bracket.

[0013] Further optimized, it also includes a curing disk, and the curing disk is provided with a rotating seat.

[0014] Further optimized, the printing method of the three-dimensional printing device for dental veneers is characterized in that it includes the following steps: a. first install the lifting plate on the connecting rod, then turn on the equipment, and three infrared ranging sensors measure the height of the bottom of the lifting plate to level the LCD screen; b. Install and tighten the material trough on the mounting frame, turn the exhaust pipe into the material trough, cover the light shield, input the slice model of the patient's dental veneer that has been scanned and processed in advance into the equipment, and the equipment starts working automatically; c. A bidirectional cross-flow pump adds resin to the material trough, and at the same time the hot air blower works to heat the inside of the light shield to 30°C. At the same time, the lifting plate is extended into the material trough, moves up and down in the material trough, stirs the resin, and then performs curing and printing; d. After printing is completed, the bidirectional cross-flow pump sucks back the resin in the material trough, removes the patch product, removes the lifting plate, places the curing tray on the material trough, places the patch product on the rotating seat, covers the light shield, turns on the ultraviolet lamp, performs secondary curing on the product, and then obtains the finished product.

[0015] The beneficial effects of the present invention are:

[0016] This device uses a pull-up LCD light-curing 3D printing. The equipment is compact and flexible, low-cost, easy and simple for medical staff to use, and has high precision. It is suitable for the production of tooth veneers in hospitals, dental clinics, etc.

[0017] This device has a leveling function. During long-term use, there will be a certain error in the inclination of the connecting rod and the lifting plate. Three infrared ranging sensors are integrated on the edge of the LCD screen to measure the distance between the LCD screen and the lifting plate. The mounting frame is adjusted through the air flotation platform to keep the LCD screen, release film and lifting plate parallel during operation. Even after long-term use, the printing accuracy can be guaranteed every time it is used.

[0018] The upper part of the lifting plate in this device is an inclined surface, which is not easy to retain resin. Before printing, the lifting plate stirs the resin solution up and down in the material trough, and cooperates with the hot air blower to increase the temperature, making the resin solution more delicate and avoiding residual bubbles, so that the printed patch products are of higher quality and higher yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the present invention Figure 1 .

[0020] Figure 2 Schematic diagram of the three-dimensional structure of the present invention Figure 2 .

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention without the material trough and the lifting plate installed.

[0022] Figure 4 The diagram is a three-dimensional structural diagram of the present invention covered with a light shield.

[0023] Figure 5 This is a three-dimensional structural schematic diagram of the feeding trough of the present invention.

[0024] Figure 6 This is a three-dimensional structural schematic diagram of the curing plate in the present invention.

[0025] In the figure: 1, base; 11, light-shielding cover; 2, air-floating platform; 3, mounting rack; 31, infrared distance sensor; 32, fixing hole; 4, feeding trough; 41, material frame; 42, release film; 43, second locking bolt; 5, LCD screen; 61, hot air blower; 62, pump housing; 621, swivel seat; 622, exhaust pipe; 7, lifting plate; 71, connecting block; 711, locking bolt; 8, lifting assembly; 81, lifting bracket; 82, lead screw; 83, slider; 84, servo motor; 85, connecting rod; 851, square plug; 86, ultraviolet lamp; 9, curing plate; 91, rotating seat. Detailed implementation manners

[0026] To clearly illustrate the technical features of this solution, the present invention will be elaborated in detail below through specific implementation manners and in conjunction with its attached drawings. In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "left", "right", "front", "rear", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0027] As Figures 1 - 6 shown, the present invention provides a three-dimensional printing device for dental veneers, including a base 1. One side of the base 1 is fixedly provided with a lifting assembly 8. A connecting rod 85 is fixedly provided on the lifting assembly 8. One end of the connecting rod 85 is fixedly provided with a detachable lifting plate 7. The lifting assembly drives the lifting plate to lift for printing. A air-floating platform 2 is fixedly provided on the base 1. An LCD screen 5 is fixedly provided on the air-floating platform 2. An LCD screen 5 is embedded in the mounting rack 3. A detachable feeding trough 4 is fixedly provided on the mounting rack 3. The feeding trough 4 is located directly above the LCD screen 5. The air-floating platform can adjust the inclination angles of the LCD screen 5 and the feeding trough 4. The lifting plate 7 is located directly above the feeding trough 4. The LCD screen 5 irradiates the resin in the feeding trough. The cured resin adheres to the lifting plate. The lifting plate is lifted to cure and print layer by layer.

[0028] The lifting plate 7 is in the shape of a terrace, and the side of the lifting plate is an inclined surface, which is not easy to retain the resin solution. Before printing, the lifting plate stirs the resin solution up and down in the material tank to make the resin solution more delicate and avoid residual bubbles, so that the printed patch products are of higher quality and higher yield. A connecting block 71 is fixed to the upper part of the lifting plate 7. A square socket is opened on one side of the connecting block 71. A locking bolt 711 is provided on the connecting block 71. One end of the connecting rod 85 is a square plug 851 corresponding to the square socket. When the lifting plate is installed and fixed, the square plug and the socket facilitate the lifting plate to remain level.

[0029] Three infrared distance sensors 31 are also installed on the edge of the LCD screen 5. The upper ends of these infrared distance sensors 31 are flush with the LCD screen 5. The infrared distance sensors 31 are used to measure the distance between the LCD screen 5 and the lifting plate 7. If the distances measured by the three infrared distance sensors are the same, it means that the LCD screen 5 is parallel to the lifting plate. Before using the device, it should be leveled to ensure the accuracy of each print and avoid errors caused by long-term use of the device.

[0030] As a preferred embodiment, the trough 4 includes a frame 41 and a release film 42. The release film 42 is fixed to the bottom of the frame 41. The cross-sections of the frame 41 and the lifting plate 7 are larger than the cross-section of the LCD screen 5. The cross-section of the frame 41 is larger than that of the lifting plate 7, ensuring that the lifting plate can be immersed in the resin in the trough. The mounting frame has two fixing holes 32. The frame is tightened to the mounting frame via second locking bolts 43. The release film 42 is tightly attached to the LCD screen 5, and the LCD screen is irradiated and cured with resin layer by layer.

[0031] As a preferred embodiment, the three infrared ranging sensors 31 are located in the downward projection of the lifting plate 7, ensuring that before installing the material trough, the infrared ranging sensors can shine upward on the lifting plate, accurately measure the distance between the LCD screen and the lifting plate, and perform leveling.

[0032] As a preferred embodiment, a light shield 11 is placed on the base 1, and a hot air blower 61 is fixed on the base 1 inside the light shield 11. The heating temperature of the hot air blower 61 is 30°C. The light shield prevents external light sources from affecting the resin curing and can also provide a certain degree of heat preservation.

[0033] As a preferred embodiment, a pump housing 62 is provided on the base 1, a bidirectional flow pump is provided inside the pump housing 62, a steering seat 621 is provided on the pump housing 62, a suction and exhaust pipe 622 is connected to the steering seat 621, and the bidirectional flow pump is externally connected to a resin barrel, which is added before printing and recycled after printing is completed.

[0034] As a preferred embodiment, the lifting assembly 8 includes a lifting bracket 81, a slider 83, a lead screw 82, and a servo motor 84. The lifting bracket 81 is fixed on the base 1. The slider 83 is slidably embedded in the lifting bracket 81. The lower end of the lead screw 82 is rotatably connected to the base 1. The lead screw 82 passes through the slider 83 and is rotatably connected to the slider 83. The servo motor 84 is fixed at the upper end of the lifting bracket 81, and the output end of the servo motor 84 is fixedly connected to the upper end of the lead screw 82. The output of the servo motor drives the slider and the lifting plate to move up and down.

[0035] As a preferred embodiment, two rows of ultraviolet lamps 86 are provided on the lifting bracket 81. After printing is completed, the ultraviolet lamps assist the curing plate in curing.

[0036] As a preferred embodiment, it further includes a curing plate 9. A rotating base 91 is provided on the curing plate 9. A micro motor and a built-in battery are provided inside the curing plate. After the patch product printing is completed, the excess part is removed and placed on the rotating base, and it is irradiated by rotation for secondary curing.

[0037] This device uses a pull-up type LCD light-curing three-dimensional printing. The device is small, flexible, low-cost, convenient and simple for medical staff to use, and has high equipment precision, which is suitable for the production of dental patches in hospitals, dental clinics, etc.

[0038] A printing method for a three-dimensional printing device for dental patches includes the following steps:

[0039] a. First, install the lifting plate 7 on the connecting rod 85, then turn on the device. The three infrared distance sensors 31 measure the height of the bottom of the lifting plate 7, and the air-floating platform works to level the mounting frame and the LCD screen 5.

[0040] b. Install and tighten the material tank 4 on the mounting frame 3, insert the suction and discharge pipe 622 into the material tank 4, cover the light-shielding cover 11, and input the sliced model of the patient's dental patch that has been scanned and processed in advance into the device. The device automatically starts working.

[0041] c. The two-way cross-flow pump adds resin to the material tank 4. At the same time, the hot air blower 61 works to raise the temperature inside the light-shielding cover 11 to 30°C. At the same time, the lifting plate 7 extends into the material tank 4 and moves up and down in the material tank 4 to stir the resin evenly. Then the LCD screen irradiates and cures the resin layer by layer for printing.

[0042] d. After printing is completed, the two-way cross-flow pump sucks back the resin in the material tank 4, remove the patch product, remove the excess support on the product, remove the lifting plate 7, place the curing plate 9 on the material tank 4, place the patch product on the rotating base 91, cover the light-shielding cover 11, turn on the ultraviolet lamp 86, perform secondary curing on the product, and then obtain the finished product.

[0043] This device also includes a controller, the position of which is set by the staff according to the actual situation during operation. The controller is used to control the electrical components used in this solution, including but not limited to infrared ranging sensors, servo motors, air flotation platforms, bidirectional cross-flow pumps, solenoid valves, hot air blowers, display screens, switch buttons, communication equipment, etc. The controller is an Intel processor, AMD processor, PLC controller, ARM processor or single-chip microcomputer, and the supporting components also include a motherboard, memory stick, storage medium and power supply. Regarding the operating principle of the controller, please refer to "Principles of Automatic Control", "Principles and Application Simulation Cases of Microcontrollers" and "Principles and Applications of Sensors" published by Tsinghua University Press. Other books in this field can also be used for reference. Other automatic control and electrical components not mentioned are all knowledge well known to those skilled in the art and will not be repeated here.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A three-dimensional printing device for dental veneers, comprising a base (1), characterized in that: On one side of the base, a lifting assembly (8) is fixed. An adapter rod (85) is fixed on the lifting assembly. One end of the adapter rod is fixed with a detachable lifting plate (7). On the base (1), an air-floating platform (2) is fixed. An installation frame (3) is fixed on the air-floating platform. An LCD screen (5) is embedded in the installation frame (3). A detachable material trough (4) is fixed on the installation frame (3). The material trough is located directly above the LCD screen. The lifting plate (7) is located directly above the material trough (4). The lifting plate (7) is trapezoidal. On the upper part of the lifting plate, an adapter block (71) is fixed. On one side of the adapter block, a square jack is provided. A locking bolt (711) is provided on the adapter block (71). One end of the adapter rod (85) is a square plug (851) corresponding to the square jack. On the edge of the LCD screen (5), there are also 3 infrared distance sensors (31). The upper ends of the infrared distance sensors are flush with the LCD screen (5). The infrared distance sensors are used to measure the distance between the LCD screen (5) and the lifting plate (7).

2. The three-dimensional printing device and printing method for dental veneers according to claim 1, characterized in that: The material trough (4) includes a material frame (41) and a release film (42). The release film (42) is fixed to the bottom of the material frame (41). The cross-sections of the material frame (41) and the lifting plate (7) are larger than the cross-section of the LCD screen (5). The cross-section of the material frame (41) is larger than the cross-section of the lifting plate (7). The release film (42) is in close contact with the LCD screen (5).

3. The three-dimensional printing device and printing method for dental veneers according to claim 1, characterized in that: The 3 infrared distance sensors (31) are located within the direct downward projection of the lifting plate (7).

4. The three-dimensional printing device and printing method for dental veneers according to claim 1, characterized in that: A light-shielding cover (11) is placed on the base (1). A hot air blower (61) is fixed on the base inside the light-shielding cover. The heating temperature of the hot air blower is 30 °C.

5. The three-dimensional printing device and printing method for dental veneers according to claim 1, characterized in that: A pump housing (62) is provided on the base (1). A two-way cross-flow pump is provided inside the pump housing (62). A swivel base (621) is provided on the pump housing (62). A suction and discharge pipe (622) is connected to the swivel base (621).

6. The three-dimensional printing device and printing method for dental veneers according to claim 1, characterized in that: The lifting assembly (8) includes a lifting bracket (81), a slider (83), a lead screw (82), and a servo motor (84). The lifting bracket (81) is fixed on the base (1). The slider (83) is slidably embedded in the lifting bracket (81). The lower end of the lead screw (82) is rotatably connected to the base (1). The lead screw (82) passes through the slider (83) and is rotatably connected to the slider (83). The servo motor (84) is fixed to the upper end of the lifting bracket (81). The output end of the servo motor (84) is fixedly connected to the upper end of the lead screw (82).

7. The three-dimensional printing device and printing method for dental veneers according to claim 6, characterized in that: Two rows of ultraviolet lamps (86) are provided on the lifting bracket (81).

8. The three-dimensional printing device and printing method for dental veneers according to claim 7, characterized in that: It also includes a curing plate (9). A swivel base (91) is provided on the curing plate.

9. A printing method of a three-dimensional printing device for dental veneers, characterized in that, It includes the following steps: a. First, install the lifting plate on the adapter rod, then turn on the device. The 3 infrared distance sensors measure the height of the bottom of the lifting plate and level the LCD screen. b. Install and tighten the material tank on the mounting frame, insert the exhaust pipe into the material tank, cover the light-shielding cover, and input the sliced model of the patient's dental patch that has been scanned and processed in advance into the device. The device will automatically start working; c. The two-way cross-flow pump adds resin into the material tank. At the same time, the hot air blower works to raise the temperature inside the light-shielding cover to 30°C. Meanwhile, the lifting plate extends into the material tank and moves up and down in the material tank to stir the resin evenly, and then solidification printing is carried out; d. After printing is completed, the two-way cross-flow pump sucks back the resin in the material tank, remove the patch product, disassemble the lifting plate, place the curing plate on the material tank, place the patch product on the rotating seat, cover the light-shielding cover, turn on the ultraviolet lamp to perform secondary curing on the product, and then obtain the finished product.

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