3D printing device for oral surgery denture and denture manufacturing method

Abstract

The invention provides a 3D printing device for oral surgery dentures and a denture manufacturing method, and relates to the technical field of denture processing.The 3D printing device comprises a workbench, a forming groove is formed in the workbench, and a forming part is slidably arranged in the forming groove; the lifting mechanism is mounted below the forming part and used for driving the forming part to ascend and descend in the vertical direction; the slurry supply mechanism comprises a rack, a releasing assembly, a tiling assembly and a scraping assembly, the rack is horizontally arranged on the workbench in a reciprocating sliding mode, and the releasing assembly, the tiling assembly and the scraping assembly are all arranged on the rack; the scraping assembly is used for automatically removing the residual zirconium oxide slurry on the surface of the tiling assembly in the suspended position; the laser galvanometer system is installed on the workbench and used for emitting laser beams and irradiating the laser beams into the forming groove, and the technical problem that the error rate of false teeth manufactured in the related technology is large can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of denture processing, and in particular to a 3D printing device for oral surgery dentures and a denture manufacturing method. Background Art

[0002] "Denture" refers to an artificial device used to replace missing teeth, also known as a false tooth. Dentures can be divided into two categories: removable dentures and fixed dentures. Removable dentures are dentures that can be removed by yourself, usually when multiple teeth are missing. Fixed dentures are fixed in the mouth by adhesives or implant technology, usually including dental bridges, crowns or dental implants. The main function of dentures is to help restore chewing ability, aesthetics and pronunciation ability, and improve the patient's quality of life.

[0003] The Chinese patent application number CN201711421792.X discloses a device for 3D printing zirconia dentures, which includes a horizontal workbench, a horizontal moving mechanism, a molding cylinder, a molding cylinder lifting mechanism, a slurry cylinder, and a laser galvanometer system. The invention sets a horizontal moving mechanism on the horizontal workbench, and the slurry cylinder moves along the horizontal moving mechanism to supply zirconia slurry to the molding cylinder. The laser galvanometer system emits laser to photo-cure the slurry in the molding cylinder to form a cross-sectional layer film of a personalized denture; the photo-curing operation of supplying zirconia slurry and the laser galvanometer system is repeated to form a personalized denture embryo layer by layer, and then post-process it to obtain a finished zirconia denture.

[0004] With respect to the above-mentioned related technologies, the applicant has found through practice that during actual use of the device, the thickness of each cross-sectional layer of the film will be significantly different from the pre-laid thickness, which results in a relatively large error rate in the manufactured dentures. Summary of the invention

[0005] The present application discloses a 3D printing device and a denture manufacturing method for oral surgery dentures, so as to solve the technical problem that the error rate of the dentures manufactured in the related art is relatively large.

[0006] In a first aspect, the present application provides a 3D printing device for oral surgical dentures, which adopts the following technical solution: A 3D printing device for oral surgical dentures, comprising: a workbench, a molding groove is provided on the workbench, a molding part is slidably provided in the molding groove; a lifting mechanism is installed below the molding part, and is used to drive the molding part to rise and fall in the vertical direction; a slurry supply mechanism, the slurry supply mechanism includes a frame, a release component, a paving component and a scraping component, the frame is horizontally and reciprocatingly slidably arranged on the workbench, the release component, the paving component and the scraping component are all arranged on the frame; wherein, the release component is used to release the zirconium oxide slurry into the molding groove with the horizontal reciprocating movement of the random frame, and the paving component is provided with a group of slurries on the front and rear sides of the release component, and the slurry is moved along the frame. In the direction of travel, the tiling assembly located at the rear end of the release assembly is in the tiling position, and the tiling assembly located at the front end of the release assembly is in the suspended position; steering parts are respectively provided at the beginning and end ends of the workbench in the direction of travel of the frame, and the steering parts are used to slide and fit with the tiling assembly located at the front end of the release assembly, and guide the corresponding tiling assembly to gradually switch from the suspended position to the tiling position, so that the corresponding tiling assembly can switch between the tiling position and the suspended position; the scraping assembly is used to automatically remove the residual zirconia slurry on the surface of the tiling assembly in the suspended position; the laser galvanometer system is installed on the workbench, and is used to emit a laser beam and irradiate it into the forming groove.

[0007] Preferably, the spreading assembly includes a powder spreading roller, a positioning slider and a first connecting rod, the frame is vertically provided with a positioning slide groove, the positioning slider is slidably arranged in the positioning slide groove, one end of the first connecting rod is coaxially connected to the powder spreading roller, and the other end is rotatably connected to the positioning slider; the length direction of the powder spreading roller is parallel to the width direction of the forming groove, and a second connecting rod is coaxially provided at one end of the powder spreading roller away from the first connecting rod, and a telescopic linkage assembly is provided on the frame, the middle part of the telescopic linkage assembly is hinged to the frame, and the two ends of the telescopic linkage assembly are respectively rotatably connected to the second connecting rod.

[0008] Preferably, magnets are provided on both inner end walls of the positioning slide, and iron blocks are provided on the upper and lower ends of the positioning slider, wherein, when the iron block located at the upper end of the positioning slider is magnetically attracted to the magnet on the inner top wall of the positioning slide, the corresponding flattening component is in a suspended position, and the other flattening component is in a flattening position under the action of the telescopic linkage component; when the iron block located at the lower end of the positioning slider is magnetically attracted to the magnet on the inner bottom wall of the positioning slide, the corresponding flattening component is in a flattening position, and the other flattening component is in a suspended position under the action of the telescopic linkage component.

[0009] Preferably, the telescopic linkage assembly includes a sleeve, a moving rod, a ring and a telescopic spring. A sliding channel is provided in the sleeve along its own axial direction. A blocking part is provided in the middle of the sliding channel. The blocking part divides the sliding channel into two sliding grooves. The moving rod is slidably arranged in the sliding groove; the ring is arranged at the end of the moving rod away from the blocking part, and the ring is rotatably sleeved and cooperated with the second connecting rod; the telescopic spring is arranged in the sliding groove, one end of the telescopic spring is connected to the blocking part, and the other end is connected to the end of the moving rod away from the ring.

[0010] Preferably, steering members are respectively provided on the workbench at both ends of the moving direction of the frame, and the steering members are used to slide and fit with the tiling assembly located at the front end of the release assembly, and guide the corresponding tiling assembly to gradually switch from a suspended position to a tiling position; the steering member includes a steering table, and the side of the steering table close to the tiling assembly has a straight guide surface and an arc-shaped guide surface, the straight guide surface is smoothly connected with the arc-shaped guide surface, and the straight guide surface is located above the arc-shaped guide surface; the tiling assembly also includes a steering roller, which is coaxially arranged on the second connecting rod, and when the tiling assembly is in the suspended position, the straight guide surface and the highest point of the steering roller are on the same horizontal straight line; when the steering roller slides in contact with the straight guide surface to the lowest point of the arc-shaped guide surface, the tiling assembly switches from the suspended position to the tiling position.

[0011] Preferably, the frame also has a driving assembly, and when the paving assembly is in a suspended position, the driving assembly starts and drives the powder spreading roller to rotate, and when the paving assembly gradually switches from a suspended position to a paving position, the driving assembly is turned off; when the paving assembly is in a suspended position, the surface of the rotating powder spreading roller fits with the scraping assembly.

[0012] Preferably, the driving assembly includes a battery, a rotating motor, a first frosting driving wheel and a first conductive sheet, the rotating motor is arranged on a frame, the first frosting driving wheel is coaxially arranged on the output shaft of the rotating motor, and the second frosting driving wheel is coaxially arranged on the first connecting rod, and when the tiling assembly is in a suspended position, the first frosting driving wheel and the second frosting driving wheel are in contact with each other in the vertical direction; the first conductive sheet is arranged on the frame, and the first conductive sheet is electrically connected to the battery through a spring wire; a support rod is arranged on the positioning slider, a second conductive sheet is arranged on the support rod and directly below the first conductive sheet, and the second conductive sheet is electrically connected to the rotating motor through a spring wire; when the tiling assembly is in a suspended position, the first conductive sheet and the second conductive sheet are in contact with each other.

[0013] Preferably, the scraping assembly includes a scraper, the length direction of the scraper is consistent with the length direction of the powder spreading roller, and when the flattening assembly is in a suspended position, the powder spreading roller is close to the scraper so that the scraper is in contact with the upper surface of the powder spreading roller.

[0014] Preferably, the frame is also provided with an adsorption assembly, which includes an adsorption pump, an adsorption head and a storage tank. The adsorption pump is installed near the top of the frame, and the pump inlet end of the adsorption pump is connected to a transverse pipe through a pipe body. The length direction of the transverse pipe is consistent with the length direction of the powder spreading roller. There are multiple adsorption heads evenly distributed along the length direction of the transverse pipe, and the multiple adsorption heads are all facing and close to the joint between the scraper and the powder spreading roller. The storage tank is connected to the pump outlet end of the adsorption pump.

[0015] In a second aspect, the present application provides a method for manufacturing a denture, which adopts the following technical solution: A method for manufacturing a denture comprises the following steps: Use an oral scanner to obtain three-dimensional data of the patient's teeth and mouth and generate a digital model; Using computer-aided design software, the shape, size and structure of the denture are designed according to the scanned data to form a complete digital denture model; Convert the designed denture model into a different format and use slicing software to cut the 3D model into 2D slices that can be recognized by a 3D printer; According to the slice data, the denture is printed layer by layer using a 3D printing device for oral surgical dentures described in the above technical solution; During printing, the frame is driven to move horizontally from one side of the molding groove to the other side of the molding groove along the workbench. During this process, the paving assembly located at the rear end of the frame in the moving direction is in the paving position, so the zirconium oxide slurry in the molding groove can be paved into a cross-sectional layer film during the movement of the frame; When the frame is completely moved to the other side of the forming groove and reaches the end point of the movement, the paving assembly at the front end of the frame in the moving direction is automatically switched from the suspended position to the paving position under the action of the steering member, and the paving assembly with the zirconium oxide slurry adhered thereto at the rear end of the frame in the moving direction is automatically switched from the paving position to the suspended position; When the tiling component with the zirconium oxide slurry adhered thereto automatically switches from the tiling position to the suspended position, the scraping component automatically removes the residual zirconium oxide slurry on the surface of the tiling component in the suspended position; Then, the frame is driven in the reverse direction to move along the workbench, so that the frame moves horizontally from the other side of the molding groove to the one side of the molding groove, and after reaching the position of the steering member, the positions of the two paving components are automatically switched under the action of the steering member, so that the paving component located at the front end of the frame in the moving direction is always in a suspended position and the zirconia slurry remaining on the surface is automatically removed by the scraping component at the same time, and the paving component located at the rear end of the frame in the moving direction is always in a paving position and paving the zirconia slurry in the molding groove into a cross-sectional layer film; Repeat the above steps several times until the denture is printed; After printing is completed, the denture is polished and cleaned.

[0016] The present invention has the following advantages and beneficial effects: When the frame moves horizontally from one side of the forming tank to the other side of the forming tank on the workbench, the release component will pour the zirconium oxide slurry into the forming tank when it moves to the top of the forming tank, and spread the zirconium oxide slurry into the forming tank as the release component continues to move. In this process, the paving component located at the rear end of the frame's travel direction is in the paving position, so it can spread the zirconium oxide slurry in the forming tank into a cross-sectional layer during the movement of the frame. When the frame completely moves to the other side of the forming tank and reaches the end of the movement, the next paving is performed.

[0017] In this process, since the moving path of the next tiling is the opposite direction of the last moving direction, the tiling position and the suspended position can be switched at this time, so that the tiling component originally in the tiling position is in the suspended position, and the tiling component originally in the suspended position is in the tiling position, so as to carry out the next tiling. Since the tiling component in the suspended position has been tiling the zirconium oxide slurry when it was in the tiling position last time, the zirconium oxide slurry will remain on the surface of the tiling component in the suspended position at this time. At this time, the zirconia slurry on the surface of the tiling component in the suspended position is scraped off by the scraping component, so that when it is the tiling component's turn to tile next time, most of the zirconia slurry on the surface of the tiling component has been removed, making it difficult for the tiling component to bring the zirconia slurry remaining on the surface to the surface of the zirconia slurry in the tiling process during the next tiling of the zirconia slurry. As a result, with the repeated tiling of the tiling component, the residual slurry from the previous operation is not easily brought back into the new layer, so as to avoid irregular bumps on the surface of the tiling layer of the zirconia slurry to a certain extent, ultimately achieving the effect of reducing the error rate of the manufactured dentures and improving the accuracy of denture manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of some embodiments of the present application; Figure 2 It is a partial structural schematic diagram of some embodiments of the present application; Figure 3 is a diagram for showing the connection relationship between the lifting mechanism and the forming part in some embodiments of the present application; Figure 4 This is a schematic diagram of a partial structure of a display rack in some embodiments of the present application. Figure 1 ; Figure 5 This is a schematic diagram of a partial structure of a display rack in some embodiments of the present application. Figure 2 ; Figure 6 This is a schematic diagram of a partial structure of a display rack in some embodiments of the present application. Figure 3 ; Figure 7 yes Figure 5 A magnified view of part A in FIG. Figure 8 It is a partial structural schematic diagram for showing a telescopic linkage component in some embodiments of the present application; Fig. 9 This is a schematic diagram of a partial structure of a display rack in some embodiments of the present application. Figure 4 ; Fig.10 yes Fig. 9 Enlarged view of part B in .

[0020] The markings in the figure are: 1. Workbench; 11. Steering member; 111. Steering table; 112. Linear guide surface; 113. Arc guide surface; 12. Driving assembly; 121. Storage battery; 122. Rotating motor; 123. First grinding driving wheel; 124. First conductive sheet; 13. Forming groove; 14. Forming part; 2. Lifting mechanism; 3. Slurry supply mechanism; 4. Frame; 41. Positioning slide; 411. Magnet; 5. Release assembly; 6. Flattening assembly; 61. Powder spreading roller; 62. Positioning slider; 621. Iron block; 622. Support rod; 623. Second conductive sheet; 63. First connecting rod; 631. Second grinding drive wheel; 64. Second connecting rod; 65. Steering roller; 7. Scraping assembly; 71. Scraper; 8. Laser galvanometer system; 9. Telescopic linkage assembly; 91. Sleeve; 92. Moving rod; 93. Ring; 94. Telescopic spring; 10. Adsorption assembly; 101. Adsorption pump; 102. Adsorption head; 103. Storage tank. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0023] In the related art, dentures, also known as false teeth, are artificial devices used to replace missing teeth, mainly divided into two categories: removable dentures and fixed dentures. Removable dentures can be removed by the patient, and are often used in cases where multiple teeth are missing; while fixed dentures are fixed in the mouth through adhesives or implant technology, usually including dental bridges, crowns or dental implants. The main function of dentures is to restore the patient's chewing ability, aesthetics and pronunciation ability, thereby significantly improving the patient's quality of life.

[0024] With the rapid development of 3D printing technology, the accuracy and efficiency of denture manufacturing have been greatly improved. Especially when using biocompatible materials (such as zirconia) to manufacture personalized dentures, 3D printing technology has broad application prospects.

[0025] The relevant technology has exposed some significant defects in practical applications, especially in terms of layer thickness control and slurry laying uniformity. Specifically, when using a powder roller to lay the zirconia slurry, since a portion of the slurry will adhere to the surface of the powder roller after each operation, these residual slurries are not effectively removed during the subsequent laying process. With the repeated use of the powder roller, the residual slurry from the previous operation is brought back into the new layer, resulting in irregular bumps on the surface of the slurry laying layer. This uneven slurry distribution makes the thickness of each cross-sectional layer inconsistent, which is quite different from the expected laying thickness.

[0026] This problem not only affects the accuracy of each layer in the 3D printing process, but also gradually accumulates errors as the number of layers increases, eventually causing the overall size and shape deviations of the finished denture to exceed the allowable range. This problem is particularly evident when printing dentures with complex shapes or high precision requirements. The accuracy of the finished denture is difficult to guarantee, which may lead to poor occlusion, discomfort when wearing, etc., thus seriously affecting the functionality and aesthetics of the denture. This accumulation of errors not only reduces the qualified rate of the finished product, but also increases processing costs and time. Therefore, the existing technology still has significant deficiencies in accurately controlling the thickness of the layer film and achieving uniform laying of the slurry, which ultimately leads to a large error rate in the manufactured dentures, which urgently needs to be improved.

[0027] In view of this, in a first aspect, some embodiments of the present application provide a 3D printing device for oral surgical dentures. Figure 1 to Figure 10 The device comprises a workbench 1, a lifting mechanism 2 and a slurry supply mechanism 3. A forming groove 13 is provided on the workbench 1, and a forming part 14 is slidably provided in the forming groove 13. Exemplarily, the forming part 14 is a rectangular plate that matches the cross-sectional shape of the forming groove 13, and moves vertically in the forming groove 13 under the action of the lifting mechanism 2.

[0028] For example, Figure 2 , Figure 3 As shown, the lifting mechanism 2 includes a cylinder and a push rod, the piston rod of the cylinder vertically extends upward and is coaxially connected to the push rod, and the push rod is connected to the bottom of the forming part 14, that is, by starting the cylinder, the forming part 14 can be pushed to vertically rise and fall in the forming groove 13. Of course, the lifting mechanism 2 can also have other settings, such as an electric cylinder or a hydraulic cylinder, as long as it can drive the forming part 14 to vertically rise and fall in the forming groove 13.

[0029] At the same time, the slurry supply mechanism 3 includes a frame 4, a release component 5, a paving component 6 and a scraping component 7. The frame 4 is horizontally and reciprocatingly slidably arranged on the workbench 1. The release component 5, the paving component 6 and the scraping component 7 are all arranged on the frame 4; wherein, the release component 5 is used to release the zirconium oxide slurry into the forming groove 13 along the horizontal reciprocating movement of the random frame 4, and a group of paving components 6 are respectively provided on the front and rear sides of the release component 5. Along the direction of movement of the frame 4, the paving component 6 located at the rear end of the release component 5 is in the paving position, and the paving component 6 located at the front end of the release component 5 is in the paving position. It is in a suspended position; steering parts 11 are respectively provided at the beginning and end ends of the moving direction of the frame 4 on the workbench 1, and the steering parts 11 are used to slide and fit with the tiling component 6 located at the front end of the release component 5, and guide the corresponding tiling component 6 to gradually switch from the suspended position to the tiling position, so that the corresponding tiling component 6 can switch between the tiling position and the suspended position; the scraping component 7 is used to automatically remove the residual zirconia slurry on the surface of the tiling component 6 in the suspended position; the laser galvanometer system 8 is installed on the workbench 1, and is used to emit a laser beam and irradiate it into the forming groove 13.

[0030] Exemplarily, rodless electric cylinders are arranged in parallel on both sides of the forming groove 13 on the workbench 1, and the length direction of the rodless electric cylinder is consistent with the length direction of the forming groove 13. The frame 4 is in the shape of a "door", and a connecting block is respectively arranged at both ends of the bottom of the frame 4, and the connecting block is connected to the moving piston of the rodless electric cylinder, so that after starting the rodless electric cylinder, the frame 4 can move back and forth above the forming groove 13. Of course, the reciprocating movement of the frame 4 can also be achieved through other structures, for example, slide rails are arranged in parallel on both sides of the forming groove 13, a slider that slides with the slide rails is arranged on the frame 4, a motor is arranged on the slider, a gear is arranged on the motor, and a rack meshing with the gear is arranged on the slide rail along the length direction of the slide rail. Starting the motor can also drive the slider to reciprocate on the slide rail.

[0031] On this basis, when the frame 4 moves horizontally from one side of the molding groove 13 to the other side of the molding groove 13 on the workbench 1, the release component 5 will pour the zirconia slurry into the molding groove 13 when it moves to the top of the molding groove 13, and spread the zirconia slurry into the molding groove 13 as the release component 5 continues to move. In this process, the paving component 6 located at the rear end of the moving direction of the frame 4 is in the paving position, so it can pave the zirconia slurry in the molding groove 13 into a cross-sectional layer film during the movement of the frame 4. When the frame 4 completely moves to the other side of the molding groove 13 and reaches the end of the movement, the next paving is performed.

[0032] In this process, since the moving path of the next tiling is the opposite direction of the last moving direction, the tiling position and the suspended position can be switched at this time, so that the tiling component 6 originally in the tiling position is in the suspended position, and the tiling component 6 originally in the suspended position is in the tiling position, so as to perform the next tiling. Since the tiling component 6 in the suspended position has already been tiling the zirconium oxide slurry when it was in the tiling position last time, the zirconium oxide slurry will remain on the surface of the tiling component 6 in the suspended position at this time. At this time, the zirconia slurry on the surface of the tiling component 6 in the suspended position is scraped off by the scraping component 7, so that when it is the tiling component 6's turn to tile next time, most of the zirconia slurry on the surface of the tiling component 6 has been removed, making it difficult for the tiling component 6 to bring the zirconia slurry remaining on the surface to the surface of the zirconia slurry in the tiling process when tiling the zirconia slurry next time, so that with the repeated tiling of the tiling component 6, the residual slurry in the previous operation is not easily brought back into the new layer, so as to avoid irregular bumps on the surface of the tiling layer of the zirconia slurry to a certain extent, and finally achieve the effect of reducing the error rate of the manufactured dentures and improving the accuracy of denture production.

[0033] It is worth noting that every time the frame 4 moves horizontally and passes through the forming groove 13 once, the lifting mechanism 2 will correspondingly descend by a distance equal to the thickness of the cross-sectional layer film.

[0034] For example, refer to Figure 1 The laser galvanometer system 8 includes a laser emitting structure and a galvanometer to adjust the irradiation intensity and angle of the laser beam. There is no specific restriction on the number of laser emitting structures and galvanometers, which can be matched with specific needs. Each time a layer of cross-sectional film is laid flat, the cross-sectional film is irradiated once by the laser emitting structure to solidify it. The laser galvanometer system 8 is an existing curing technology in the industry, and its curing principle will not be described here.

[0035] In some embodiments, in combination Figure 4 , Figure 5 The paving assembly 6 includes a powder spreading roller 61, a positioning slider 62 and a first connecting rod 63. The frame 4 is vertically provided with a positioning slot 41. The positioning slider 62 is slidably arranged in the positioning slot 41. One end of the first connecting rod 63 is coaxially connected to the powder spreading roller 61, and the other end is rotatably connected to the positioning slider 62. The length direction of the powder spreading roller 61 is parallel to the width direction of the forming groove 13. The end of the powder spreading roller 61 away from the first connecting rod 63 is coaxially provided with a second connecting rod 64. Figure 6 A telescopic linkage assembly 9 is provided on the frame 4, the middle part of the telescopic linkage assembly 9 is hinged to the frame 4, and both ends of the telescopic linkage assembly 9 are rotatably connected to the second connecting rod 64 respectively.

[0036] Exemplarily, the powder spreading roller 61 and the first connecting rod 63 are both cylindrical. A guide groove is provided on the inner side wall of the positioning slot 41 along the length direction of the positioning slot 41, and a guide block sliding in the guide groove is provided on the positioning slider 62. The positioning slider 62 can slide stably in the positioning slot 41 through the arrangement of the guide groove and the guide block without being easily separated.

[0037] Based on this, since the powder spreading roller 61 is rotatably arranged on the positioning slider 62, the zirconium oxide slurry can be spread flat by the powder spreading roller 61 being attached to the surface of the zirconium oxide slurry in the forming tank 13 and the frame 4 being moved horizontally.

[0038] In some embodiments, in combination Figure 5 , Figure 7 , magnets 411 are provided on the two inner end walls of the positioning slide 41, and iron blocks 621 are provided on the upper and lower ends of the positioning slider 62; wherein, when the iron block 621 located at the upper end of the positioning slider 62 is magnetically attracted to the magnet 411 on the inner top wall of the positioning slide 41, the corresponding flattening component 6 is in a suspended position, and the other flattening component 6 is in a flattening position under the action of the telescopic linkage component 9; when the iron block 621 located at the lower end of the positioning slider 62 is magnetically attracted to the magnet 411 on the inner bottom wall of the positioning slide 41, the corresponding flattening component 6 is in a flattening position, and the other flattening component 6 is in a suspended position under the action of the telescopic linkage component 9.

[0039] In this way, when the magnet 411 and the iron block 621 are attracted to each other, the movement of the positioning slider 62 in the positioning chute 41 is limited. For example, when the iron block 621 at the lower end of the positioning slider 62 is magnetically attracted to the magnet 411 on the inner bottom wall of the positioning chute 41, the corresponding paving assembly 6 is in the paving position, that is, the lower end of the powder roller 61 is in a position that is level with the upper surface of the zirconia slurry. At this time, as the frame 4 moves, the powder roller 61 can press over the surface of the zirconia slurry during the rotation process, so that the zirconia slurry forms a relatively uniform cross-sectional layer film. At the same time, due to the adsorption of the magnet 411 and the iron block 621, the powder roller 61 can be stabilized in the current position and is not easy to loosen. Exemplarily, in order to improve the stability of the powder roller 61 during the paving of the zirconia slurry, the magnet 411 is configured as a neodymium iron boron magnet 411 with a large magnetic attraction. If cost is considered, ordinary magnets 411 can still be used, because in some cases, when the powder spreading roller 61 spreads the zirconium oxide slurry, the zirconium oxide slurry will not cause excessive reaction force on the powder spreading roller 61, so that ordinary magnets 411 can also meet the stability requirements of the powder spreading roller 61. Therefore, the specific selection of magnets 411 can refer to the specific usage scenario.

[0040] In some embodiments, reference Figure 6 , Figure 8The telescopic linkage assembly 9 includes a sleeve 91, a moving rod 92, a collar 93 and a telescopic spring 94. A sliding channel is provided in the sleeve 91 along its own axial direction. A blocking portion is provided in the middle of the sliding channel. The blocking portion divides the sliding channel into two sliding grooves. The moving rod 92 is slidably arranged in the sliding groove; the collar 93 is arranged at one end of the moving rod 92 away from the blocking portion, and the collar 93 is rotatably sleeved with the second connecting rod 64; the telescopic spring 94 is arranged in the sliding groove, one end of the telescopic spring 94 is connected to the blocking portion, and the other end is connected to one end of the moving rod 92 away from the collar 93. Exemplarily, the collar 93 and the second connecting rod 64 are fixedly rotatably connected, that is, the collar 93 can rotate relative to the second connecting rod 64, but the position where the collar 93 is connected to the second connecting rod 64 is limited. Exemplarily, the middle part of the outer wall of the sleeve 91 is hinged to the inner wall of the frame 4.

[0041] Through the above scheme, when the powder spreading roller 61 located on one side of the release component 5 moves vertically downward to the flat position, the iron block 621 at the lower end of the positioning slider 62 corresponding to the powder spreading roller 61 is attracted to the magnet 411 on the inner bottom wall of the positioning slot 41. In the process of the positioning slider 62 corresponding to the powder spreading roller 61 moving downward, the corresponding moving rod 92 will tilt and rotate downward, thereby driving the moving rod 92 on the other side of the hinge point on the sleeve 91 to tilt and rotate upward, so that the positioning slider 62 corresponding to the powder spreading roller 61 on the other side of the release component 5 will move vertically upward in the positioning slot 41. At the same time, the telescopic spring 94 in the sliding channel can adjust the telescopic degree of the moving rod 92 in the sleeve 91 to adapt to the movement of the corresponding positioning slider 62 in the positioning slot 41, thereby achieving the effect that the second connecting rod 64 located at both ends of the sleeve 91 can normally drive the positioning slider 62 to move vertically in the positioning slot 41.

[0042] In some embodiments, Figure 2 , Fig. 9As shown, the workbench 1 is provided with steering members 11 at both ends of the moving direction of the frame 4, and the steering member 11 is used to slide and fit with the tiling assembly 6 located at the front end of the release assembly 5, and guide the corresponding tiling assembly 6 to gradually switch from the suspended position to the tiling position; the steering member 11 includes a steering platform 111, and the side of the steering platform 111 close to the tiling assembly 6 has a straight guide surface 112 and an arc-shaped guide surface 113, the straight guide surface 112 is smoothly connected with the arc-shaped guide surface 113, and the straight guide surface 112 is located above the arc-shaped guide surface 113; the tiling assembly 6 also includes a steering roller 65, which is coaxially arranged on the second connecting rod 64), when the tiling assembly 6 is in the suspended position, the highest points of the straight guide surface 112 and the steering roller 65 are on the same horizontal straight line; when the steering roller 65 fits the straight guide surface 112 and slides to the lowest point of the arc-shaped guide surface 113, the tiling assembly 6 switches from the suspended position to the tiling position. It is worth noting that the beginning and end ends of the moving direction of the rack 4 refer to the positions where the rack 4 will turn and continue to move in the opposite direction.

[0043] Exemplarily, the width of the turning platform 111 is matched with the length of the turning roller 65 , and the width direction of the turning platform 111 is parallel to the length direction of the turning roller 65 .

[0044] With such a configuration, when the tiling component 6 in the suspended position is about to be at the terminal position (the end of the traveling direction) along with the traveling direction of the random rack 4, the highest point of the steering roller 65 on the corresponding tiling component 6 will fit on the straight guide surface 112, and slide from the straight guide surface 112 to the arc-shaped guide surface 113 during the movement of the rack 4. During this process, the steering roller 65 in the tiling component 6 in the suspended position will be pressed down by the arc-shaped guide surface 113, causing the corresponding tiling component 6 to gradually switch from the suspended position to the tiling position, and the other tiling component 6 will switch from the tiling position to the suspended position during this process. Finally, the moving rack 4 can be stopped first, and then the traveling direction of the rack 4 can be changed in the opposite direction, so that the moving direction of the rack 4 is changed while changing the position state of the tiling components 6 on both sides of the release component 5.

[0045] In some embodiments, reference Figure 5 , Figure 7 The frame 4 also has a driving component 12. When the paving component 6 is in a suspended position, the driving component 12 starts and drives the powder spreading roller 61 to rotate. When the paving component 6 gradually switches from the suspended position to the paving position, the driving component 12 is turned off; when the paving component 6 is in a suspended position, the surface of the rotating powder spreading roller 61 fits with the scraping component 7.

[0046] Specifically, the driving assembly 12 includes a battery 121, a rotating motor 122, a first frosting driving wheel 123 and a first conductive sheet 124. The rotating motor 122 is arranged on the frame 4. The first frosting driving wheel 123 is coaxially arranged on the output shaft of the rotating motor 122. The first connecting rod 63 is coaxially provided with a second frosting driving wheel 631. When the paving assembly 6 is in a suspended position, the first frosting driving wheel 123 and the second frosting driving wheel 631 are in contact with each other in the vertical direction. The first conductive sheet 124 is arranged on the frame 4, and the first conductive sheet 124 is electrically connected to the battery 121 through a spring wire. The positioning slider 62 is provided with a support rod 622, and a second conductive sheet 623 is provided on the support rod 622 and directly below the first conductive sheet 124. The second conductive sheet 623 is electrically connected to the rotating motor 122 through a spring wire; when the tiling assembly 6 is in a suspended position, the first conductive sheet 124 fits the second conductive sheet 623. It is worth noting that the support rod 622 is arranged to avoid the first connecting rod 63, so that the rotation of the first connecting rod 63 will not affect the support rod 622.

[0047] On this basis, when one group of tiling components 6 is in the suspended position, the first frosting driving wheel 123 on the corresponding tiling component 6 will actively approach the second frosting driving wheel 631 and fit with it, and the powder spreading roller 61 fits with the scraping component 7. At the same time, the first conductive sheet 124 and the second conductive sheet 623 on the support rod 622 also fit synchronously, so that the battery 121 and the rotating motor 122 are electrically connected. At this time, the rotating motor 122 will drive the first frosting driving wheel 123 to rotate, and then drive the second frosting driving wheel 631 to rotate. At this time, the rotation of the second frosting driving wheel 631 will synchronously drive the tiling wheel with zirconium oxide slurry adhered to the surface to rotate, so that the scraping component 7 scrapes off the zirconium oxide slurry remaining on the surface of the rotating powder spreading roller 61, thereby achieving a more convenient effect of scraping off the zirconium oxide slurry remaining on the surface of the powder spreading roller 61.

[0048] At the same time, when the paving assembly 6 moves downward and leaves the suspended position, the second conductive sheet 623 is disconnected from the first conductive sheet 124, and the powder spreading roller 61 automatically stops rotating.

[0049] In some embodiments, Figure 6 , Fig. 9 , the scraping assembly 7 includes a scraper 71, and the length direction of the scraper 71 is consistent with the length direction of the powder spreading roller 61. When the paving assembly 6 is in a suspended position, the powder spreading roller 61 is close to the scraper 71 so that the scraper 71 contacts the upper surface of the powder spreading roller 61. Exemplarily, the turning platform 111 and the scraper 71 are staggered, so that when the turning platform 111 and the turning roller 65 are slidably fitted, the turning platform 111 will not contact the scraper 71.

[0050] In some embodiments, reference Figure 6, Fig. 9 The frame 4 is also provided with an adsorption assembly 10, which includes an adsorption pump 101, an adsorption head 102 and a storage tank 103. The adsorption pump 101 is installed near the top of the frame 4. The pump inlet of the adsorption pump 101 is connected to a transverse pipe through a pipe body. The length direction of the transverse pipe is consistent with the length direction of the powder spreading roller 61. There are multiple adsorption heads 102 evenly distributed along the length direction of the transverse pipe, and the multiple adsorption heads 102 are all facing and close to the joint between the scraper 71 and the powder spreading roller 61. The storage tank 103 is connected to the pump outlet of the adsorption pump 101. Exemplarily, combined with Fig.10 , the position that the multiple adsorption heads 102 are facing is the downstream side of the rotation direction of the powder spreading roller 61, that is, the position where the scraper 71 and the rotating powder spreading roller 61 fit together will form a storage space, and the storage space will have the scraped zirconium oxide slurry remaining, and the position that the multiple adsorption heads 102 are facing is facing the storage space. At this time, the adsorption pump 101 can be directly started to suck the zirconium oxide slurry in the storage space into the storage tank 103 through the adsorption head 102, and it can also be recycled and put back into the release component 5. Exemplarily, the adsorption pump 101 is also electrically connected to the second conductive sheet 623 through a spring wire, so that when the paving component 6 is in a suspended position, the adsorption pump 101 is automatically started.

[0051] For example, refer to Figure 1 , Fig. 9 The release assembly 5 includes a funnel and a movable plate, which is hinged at the lower end of the funnel. The movable plate can be controlled to open and close by a driving member such as a cylinder, an electric cylinder, a motor, and a hydraulic cylinder. When the funnel passes through the forming groove 13, the movable plate will open, and then the zirconium oxide slurry will be discharged into the forming groove 13. Since the release assembly 5 is a prior art, its working principle will not be described in detail here. Furthermore, in order to prevent the laser emitted by the laser galvanometer system 8 from accidentally solidifying the zirconium oxide slurry in the funnel, a shielding plate is detachably provided at the top opening of the funnel.

[0052] Please refer to Figure 1 to Figure 10 Some embodiments of the present application also disclose a method for manufacturing a denture, comprising the following steps: Use an oral scanner to obtain three-dimensional data of the patient's teeth and mouth and generate a digital model; Using computer-aided design software, the shape, size and structure of the denture are designed according to the scanned data to form a complete digital denture model; Convert the designed denture model into a different format and use slicing software to cut the 3D model into 2D slices that can be recognized by a 3D printer; According to the slice data, the denture is printed layer by layer using the 3D printing device for oral surgical dentures in the above scheme; During printing, the frame 4 is driven to move horizontally from one side of the molding groove 13 to the other side of the molding groove 13 on the workbench 1. During this process, the paving assembly 6 located at the rear end of the moving direction of the frame 4 is in the paving position, so the zirconium oxide slurry in the molding groove 13 can be paved into a cross-sectional layer film during the movement of the frame 4; When the frame 4 is completely moved to the other side of the forming groove 13 and reaches the end of the movement, the paving assembly 6 at the front end of the frame 4 in the moving direction is automatically switched from the suspended position to the paving position under the action of the steering member 11, and the paving assembly 6 with the zirconium oxide slurry adhered thereto at the rear end of the frame 4 in the moving direction is automatically switched from the paving position to the suspended position; When the paving assembly 6 with the zirconium oxide slurry adhered thereto automatically switches from the paving position to the suspended position, the scraping assembly 7 automatically removes the residual zirconium oxide slurry on the surface of the paving assembly 6 in the suspended position; Then, the frame 4 is driven in the reverse direction to move along the workbench 1, so that the frame 4 moves horizontally from the other side of the molding groove 13 to the one side of the molding groove 13, and after reaching the position of the steering member 11, the positions of the two paving components 6 are automatically switched under the action of the steering member 11, so that the paving component 6 located at the front end of the frame 4 in the moving direction is always in a suspended position and the zirconium oxide slurry remaining on the surface is automatically removed by the scraping component 7 at the same time, and the paving component 6 located at the rear end of the frame 4 in the moving direction is always in a paving position and paving the zirconium oxide slurry in the molding groove 13 into a cross-sectional layer film; Repeat the above steps several times until the denture is printed; After printing is completed, the denture is polished and cleaned.

[0053] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A 3D printing device for oral surgical dentures, characterized in that: include: A workbench (1), wherein a molding groove (13) is provided on the workbench (1), and a molding portion (14) is slidably provided in the molding groove (13); A lifting mechanism (2) is installed below the forming section (14) and is used to drive the forming section (14) to move up and down in a vertical direction; A slurry supply mechanism (3), the slurry supply mechanism (3) comprising a frame (4), a release component (5), a flattening component (6) and a scraping component (7), the frame (4) being arranged horizontally and reciprocatingly on the workbench (1), the release component (5), the flattening component (6) and the scraping component (7) being arranged on the frame (4); wherein: The release component (5) is used to release the zirconium oxide slurry into the forming groove (13) with the horizontal reciprocating movement of the random frame (4); a group of the flattening components (6) are respectively provided on the front and rear sides of the release component (5); along the direction of travel of the frame (4), the flattening components (6) located at the rear end of the release component (5) are in the flattening position, and the flattening components (6) located at the front end of the release component (5) are in the suspended position; on the workbench (1), steering members (11) are respectively provided at the beginning and end ends of the direction of travel of the frame (4); the steering members (11) are used to slide and fit with the flattening components (6) located at the front end of the release component (5), and guide the corresponding flattening components (6) to gradually switch from the suspended position to the flattening position, so that the corresponding flattening components (6) can switch between the flattening position and the suspended position; The scraping component (7) is used to automatically remove residual zirconium oxide slurry on the surface of the paving component (6) in the suspended position; The laser galvanometer system (8) is mounted on the workbench (1) and is used to emit a laser beam and irradiate the inside of the molding groove (13).

2. A 3D printing device for oral surgical dentures according to claim 1, characterized in that: The paving assembly (6) comprises a powder spreading roller (61), a positioning slide block (62) and a first connecting rod (63); the frame (4) is vertically provided with a positioning slide groove (41); the positioning slide block (62) is slidably arranged in the positioning slide groove (41); one end of the first connecting rod (63) is coaxially connected to the powder spreading roller (61) and the other end is rotatably connected to the positioning slide block (62); The length direction of the powder spreading roller (61) is parallel to the width direction of the forming groove (13); a second connecting rod (64) is coaxially provided at one end of the powder spreading roller (61) away from the first connecting rod (63); a telescopic linkage component (9) is provided on the frame (4); the middle part of the telescopic linkage component (9) is hinged to the frame (4), and both ends of the telescopic linkage component (9) are rotatably connected to the second connecting rod (64) respectively.

3. A 3D printing device for oral surgical dentures according to claim 2, characterized in that: Magnets (411) are provided on both inner end walls of the positioning slide groove (41), and iron blocks (621) are provided on the upper and lower ends of the positioning slide block (62); wherein: When the iron block (621) located at the upper end of the positioning slide block (62) is magnetically attracted to the magnet (411) on the inner top wall of the positioning slide groove (41), the corresponding flattening component (6) is in a suspended position, and the other flattening component (6) is in a flattening position under the action of the telescopic linkage component (9); When the iron block (621) at the lower end of the positioning slide block (62) is magnetically attracted to the magnet (411) on the inner bottom wall of the positioning slide groove (41), the corresponding flattening component (6) is in a flattening position, and the other flattening component (6) is in a suspended position under the action of the telescopic linkage component (9).

4. A 3D printing device for oral surgical dentures according to claim 3, characterized in that: The telescopic linkage assembly (9) comprises a sleeve (91), a moving rod (92), a collar (93) and a telescopic spring (94); a sliding channel is provided in the sleeve (91) along its axial direction; a blocking portion is provided in the middle of the sliding channel; the blocking portion divides the sliding channel into two sliding grooves; the moving rod (92) is slidably arranged in the sliding groove; The collar (93) is arranged at an end of the moving rod (92) away from the blocking portion, and the collar (93) is rotatably sleeved with the second connecting rod (64); The telescopic spring (94) is arranged in the sliding groove, one end of the telescopic spring (94) is connected to the blocking portion, and the other end is connected to an end of the moving rod (92) away from the ring (93).

5. The 3D printing device for oral surgical dentures according to claim 2, characterized in that: The steering member (11) comprises a steering platform (111), and a side of the steering platform (111) close to the paving assembly (6) comprises a straight guide surface (112) and a curved guide surface (113), the straight guide surface (112) and the curved guide surface (113) being smoothly connected, and the straight guide surface (112) is located above the curved guide surface (113); The paving assembly (6) further comprises a steering roller (65), wherein the steering roller (65) is coaxially arranged on the second connecting rod (64), and when the paving assembly (6) is in a suspended position, the straight guide surface (112) and the highest point of the steering roller (65) are on the same horizontal straight line; When the steering roller (65) slides to the lowest point of the arc-shaped guide surface (113) in contact with the straight guide surface (112), the paving assembly (6) switches from the suspended position to the paving position.

6. A 3D printing device for oral surgical dentures according to claim 2, characterized in that: The frame (4) also has a driving component (12), and when the paving component (6) is in a suspended position, the driving component (12) is started and drives the powder spreading roller (61) to rotate, and when the paving component (6) gradually switches from the suspended position to the paving position, the driving component (12) is turned off; When the spreading component (6) is in a suspended position, the surface of the rotating powder spreading roller (61) is in contact with the scraping component (7).

7. A 3D printing device for oral surgical dentures according to claim 6, characterized in that: The driving assembly (12) comprises a storage battery (121), a rotating motor (122), a first grinding driving wheel (123) and a first conductive sheet (124); the rotating motor (122) is arranged on a frame (4); the first grinding driving wheel (123) is coaxially arranged on an output shaft of the rotating motor (122); a second grinding driving wheel (631) is coaxially arranged on the first connecting rod (63); when the paving assembly (6) is in a suspended position, the first grinding driving wheel (123) and the second grinding driving wheel (631) are in contact with each other in a vertical direction; The first conductive sheet (124) is arranged on the frame (4), and the first conductive sheet (124) is electrically connected to the storage battery (121) via a spring wire; A support rod (622) is provided on the positioning slider (62), a second conductive sheet (623) is provided on the support rod (622) and directly below the first conductive sheet (124), and the second conductive sheet (623) is electrically connected to the rotating motor (122) via a spring wire; When the tiling component (6) is in a suspended position, the first conductive sheet (124) and the second conductive sheet (623) are in contact with each other.

8. A 3D printing device for oral surgical dentures according to claim 7, characterized in that: The scraping assembly (7) comprises a scraper (71), the length direction of the scraper (71) is consistent with the length direction of the powder spreading roller (61), and when the spreading assembly (6) is in a suspended position, the powder spreading roller (61) is close to the scraper (71) so that the scraper (71) contacts the upper surface of the powder spreading roller (61).

9. A 3D printing device for oral surgical dentures according to claim 8, characterized in that: The frame (4) is also provided with an adsorption assembly (10), the adsorption assembly (10) comprising an adsorption pump (101), an adsorption head (102) and a storage tank (103), the adsorption pump (101) being installed at a position close to the top of the frame (4), the pump inlet end of the adsorption pump (101) being connected to a transverse pipe via a pipe body, the length direction of the transverse pipe being consistent with the length direction of the powder spreading roller (61), a plurality of adsorption heads (102) being evenly distributed along the length direction of the transverse pipe, and the plurality of adsorption heads (102) are all oriented toward and close to the contact point between the scraper (71) and the powder spreading roller (61), and the storage tank (103) is connected to the pump outlet end of the adsorption pump (101).

10. A method for manufacturing a denture, characterized in that: The following steps are involved: Use an oral scanner to obtain three-dimensional data of the patient's teeth and mouth and generate a digital model; Using computer-aided design software, the shape, size and structure of the denture are designed according to the scanned data to form a complete digital denture model; Convert the designed denture model into a different format and use slicing software to cut the 3D model into 2D slices that can be recognized by a 3D printer; Printing the denture layer by layer using the 3D printing device for oral surgical dentures according to any one of claims 1 to 9 according to the slice data; During printing, the frame (4) is driven to move horizontally from one side of the molding groove (13) to the other side of the molding groove (13) on the workbench (1). During this process, the paving assembly (6) located at the rear end of the moving direction of the frame (4) is in a paving position, so that the zirconium oxide slurry in the molding groove (13) can be paved into a cross-sectional layer film during the movement of the frame (4); When the frame (4) is completely moved to the other side of the molding groove (13) and reaches the end point of the movement, the paving assembly (6) located at the front end of the frame (4) in the direction of travel is automatically switched from the suspended position to the paving position under the action of the steering member (11), and the paving assembly (6) with the zirconium oxide slurry adhered thereto located at the rear end of the frame (4) in the direction of travel is automatically switched from the paving position to the suspended position; When the paving component (6) to which the zirconium oxide slurry adheres automatically switches from the paving position to the suspended position, the scraping component (7) automatically removes the residual zirconium oxide slurry on the surface of the paving component (6) in the suspended position; Then, the frame (4) is driven in the reverse direction to move along the workbench (1), so that the frame (4) moves horizontally from the other side of the molding groove (13) to the one side of the molding groove (13), and after reaching the position of the steering member (11), the positions of the two paving components (6) are automatically switched under the action of the steering member (11), so that the paving component (6) located at the front end of the frame (4) in the moving direction is always in a suspended position and the zirconium oxide slurry remaining on the surface is automatically removed by the scraping component (7), and the paving component (6) located at the rear end of the frame (4) in the moving direction is always in a paving position and paving the zirconium oxide slurry in the molding groove (13) into a cross-sectional layer film; Repeat the above steps several times until the denture is printed; After printing is completed, the denture is polished and cleaned.

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