A 3D printer for denture models

Abstract

The present invention discloses a 3D printer for a denture model, comprising a printer body, wherein the inner bottom wall of the printer body is provided with a rectangular groove, and the inner walls on both sides of the rectangular groove are fixedly installed with sliding rods, the number of the sliding rods is two, and the surfaces of the two sliding rods are respectively slidably connected with a fixed block and a T-shaped slider, the upper surface of the fixed block is fixedly installed with a placement plate, the left inner wall of the rectangular groove is fixedly installed with a forward and reverse motor, and the lower surface of the printer body is fixedly installed with a mounting seat, the lower surface of the mounting seat is provided with a cylindrical groove, and the inner wall of the cylindrical groove is provided with two sliding grooves. The 3D printer for the denture model, by providing a fixed block, a T-shaped slider, a placement plate, a forward and reverse motor, a threaded rod and a connecting block, enables the 3D printer for the denture model to move the placement plate to the outside of the printer body through the forward and reverse motor when placing the model tool, thereby facilitating the operator to place the model tool.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printing, in particular to a 3D printer for denture models. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer.

[0003] At present, 3D printing technology has been gradually applied to the printing of denture models. When printing denture models with existing 3D printers, operators mostly place the template tool on the printing part of the printer by hand. This method is cumbersome and cannot ensure the correct position and direction of the template tool.

[0004] Therefore, we need a 3D printer for denture models. Summary of the invention

[0005] The object of the present invention is to provide a 3D printer for denture models to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a 3D printer for denture models, comprising:

[0007] A printer body, wherein a rectangular groove is provided on the inner bottom wall of the printer body, and sliding rods are fixedly installed on the inner walls on both sides of the rectangular groove. There are two sliding rods, and the surfaces of the two sliding rods are respectively slidably connected with a fixed block and a T-shaped slider, and a placing plate is fixedly installed on the upper surface of the fixed block. A forward and reverse motor is fixedly installed on the left inner wall of the rectangular groove, and a mounting seat is fixedly installed on the lower surface of the printer body. A cylindrical groove is provided on the lower surface of the mounting seat, and two sliding grooves are provided on the inner wall of the cylindrical groove. The inner walls of the two sliding grooves are slidably connected with a limiting disk, and an opening is provided on the upper surface of the limiting disk, and a cylindrical rod is fixedly installed on the inner wall of the opening, and one end of the cylindrical rod extends to the upper surface of the limiting disk, and the other end of the cylindrical rod extends to the lower surface of the limiting disk.

[0008] Preferably, a sliding groove adapted to the T-shaped slider is provided on the lower surface of the placement plate, and the T-shaped slider is slidably connected to the lower surface of the placement plate via the sliding groove.

[0009] Preferably, a threaded rod is fixedly installed on the output end of the forward and reverse motor, and the end of the threaded rod away from the forward and reverse motor is rotatably connected to the right inner wall of the rectangular groove through a bearing. A connecting block is fixedly installed on the lower surface of the placement plate, and a threaded hole is opened on the side of the connecting block. The inner wall of the threaded hole is threadedly connected to the surface of the threaded rod.

[0010] Preferably, the number of the mounting seats is four, and the four mounting seats are arranged in a rectangular array at the four corners of the printer body respectively.

[0011] Preferably, a shock absorbing spring is fixedly mounted on the upper surface of the limiting plate, and one end of the shock absorbing spring away from the limiting plate is fixedly connected to the inner top wall of the cylindrical groove.

[0012] Preferably, a support seat is fixedly mounted on the bottom end of the cylindrical rod, and anti-slip protrusions are fixedly mounted on the lower surface of the support seat. The number of the anti-slip protrusions is several, and the several anti-slip protrusions are arranged in a rectangular array on the lower surface of the support seat.

[0013] Preferably, the right side of the printer body is rotatably connected to a cover plate via a hinge, a handle is provided on the side of the cover plate, a surface of the handle is covered with an anti-slip rubber sleeve, and a control unit is provided on the right side of the printer body.

[0014] Preferably, the upper surface of the placement plate is provided with a first slide rail, a separation mechanism, a first cylinder, and a baffle;

[0015] The number of the first slide rails is two, the first slide rails are arranged on the upper surface of the placement plate, the baffle is arranged at the left end of the upper surface of the placement plate, the separation mechanism is arranged between the first slide rails, the left end of the first cylinder is fixedly connected to the right side of the baffle, and the right end of the first cylinder is fixedly connected to the left side of the separation mechanism;

[0016] The first slide rail includes a main body, an inclined surface, and a first track. The first slide rail main body is arranged on the upper surface of the placement plate. The number of the inclined surfaces is two, and the inclined surfaces are arranged at both ends of the first slide rail main body. The first track is arranged on the inner side of the first slide rail main body. The positions of the two first tracks correspond to each other, and the openings are both facing inwards.

[0017] The separation mechanism includes a sliding handle, a connecting rod, and a cutting shovel. The sliding handle is slidably connected to the first track. The sliding handle is detachably arranged at both ends of the connecting rod by bolts. The right end of the first cylinder is connected to the left side of the connecting rod. The cutting shovel is detachably arranged at the bottom of the connecting rod by the bolts. The upper and lower surfaces of the sliding handle are respectively provided with grooves, and the grooves and the first track are filled with round particles.

[0018] Preferably, a dust removal mechanism and a support mechanism are further provided above the placement plate, and the dust removal mechanism is provided at the bottom of the support mechanism;

[0019] The supporting mechanism comprises a second slide rail, a slide plate, a second cylinder and a third cylinder;

[0020] There are two second slide rails, which are respectively arranged on the inner side walls of the printer body and correspond to each other, a second track is arranged inside the second slide rail, the slide plate is slidably connected to the second track, the rear end of the second cylinder is fixedly connected to the inner side wall of the printer body, the front end of the second cylinder is fixedly connected to the side of the slide plate, the third cylinder is arranged at the bottom of the slide plate, and the dust removal mechanism is arranged at the bottom of the third cylinder;

[0021] The dust removal mechanism includes a mechanism body, a guide path, a conveying end, a brush plate, a leak-proof passage, a collecting device, a spare collecting device, and a suction device;

[0022] The guide path is arranged inside the mechanism body, a plurality of dust collecting holes are arranged at the bottom of the mechanism body, the conveying end is arranged at the upper end of the mechanism body, the leakage-proof passage is arranged at the bottom center of the mechanism body, the dust collecting holes, the conveying end and the leakage-proof passage are respectively conductively connected with the guide path, the brush plate is arranged at the bottom of the mechanism body, the brush plate is controlled and connected by a motor, the standby collecting device is arranged at the bottom of the leakage-proof passage, the collecting device is arranged on the side of the mechanism body and is conductively connected with the conveying end, the suction device is arranged between the collecting device and the conveying end, and the top of the mechanism body is fixedly connected with the third cylinder.

[0023] Preferably, the printer body has a built-in scanning program to realize printing, and the scanning program is realized according to a predetermined method, and the steps of the predetermined method are as follows:

[0024] Step 1: Calculate the path after 3D printing compensation according to the following formula:

[0025]

[0026] Where: a is the constant of the path straight line equation after compensation, l r To compensate for the radius, N1 and N2 are the constants of the straight line equations of two adjacent intersecting paths;

[0027] Step 2, obtaining the intersection coordinates by combining the compensated paths in step 1, and controlling the built-in scanning program of the printer body (1) to establish a model according to the compensated intersection coordinates.

[0028] Beneficial Effects

[0029] The present invention provides a 3D printer for denture models, which has the following beneficial effects:

[0030] 1. The 3D printer for the denture model is provided with a fixed block, a T-shaped slider, a placement plate, a forward and reverse motor, a threaded rod and a connecting block, so that when placing the model tool, the 3D printer for the denture model can move the placement plate to the outside of the printer body through the forward and reverse motor, thereby facilitating the operator to place the model tool.

[0031] 2. The 3D printer of the denture model is provided with a mounting seat, a limit plate, a cylindrical rod and a shock-absorbing spring, so that during long-term use, the 3D printer of the denture model can buffer the vibration generated by the printer body through the shock-absorbing spring, thereby improving the stability of the printer body during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the front cross-section structure of a 3D printer for a denture model according to the present invention;

[0033] Figure 2 A schematic diagram of the side structure of a 3D printer for a denture model according to the present invention;

[0034] Figure 3 for Figure 1 The enlarged structural diagram at A in the middle;

[0035] Figure 4 for Figure 1 Enlarged structural diagram at B in the middle.

[0036] Figure 5 This is a schematic diagram of the structure of a placement plate of a 3D printer for a denture model described in the present invention.

[0037] Figure 6 This is a schematic diagram of the structure of a separation mechanism of a 3D printer for a denture model according to the present invention.

[0038] Figure 7 An exploded view of the structural schematic diagram of the separation mechanism of a 3D printer for a denture model described in the present invention.

[0039] Figure 8 This is a schematic diagram of the structure of a support mechanism of a 3D printer for a denture model according to the present invention.

[0040] Fig. 9 This is a schematic structural diagram of a dust removal mechanism of a 3D printer for a denture model according to the present invention.

[0041] Fig.10 This is a schematic structural diagram of a backup collection device of a 3D printer for a denture model described in the present invention when the suction is stopped.

[0042] In the figure: 1 printer body, 2 slide bar, 3 fixed block, 4 T-type slide block, 5 placement plate, 6 forward and reverse motor, 7 mounting seat, 8 limit plate, 9 cylindrical rod, 10 slide groove, 11 threaded rod, 12 connecting block, 13 shock absorbing spring, 14 support seat, 15 cover plate, 16 handle, 17 first slide rail, 18 separation mechanism, 19 cylinder, 20 baffle, 17-1 first slide rail body, 17-2 inclined surface, 17-3 first track, 18-1 slide handle, 18-2 connecting rod, 18-3 cutting shovel, 18-4 groove, 21 dust removal mechanism, 22 supporting mechanism, 21-1 mechanism body, 21-2 dust collecting hole, 21-3 guide path, 21-4 conveying end, 21-5 brush plate, 21-6 leak-proof passage, 21-7 spare collecting device, 21-8 suction device, 21-9 collecting device, 22-1 second slide rail, 22-2 slide plate, 22-3 second cylinder, 22-4 third cylinder. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 1-7 The present invention provides a technical solution: a 3D printer for denture models, comprising a printer body 1, the right side of the printer body 1 is rotatably connected to a cover plate 15 through a hinge, a handle 16 is provided on the side of the cover plate 15, and a non-slip rubber sleeve is provided on the surface of the handle 16, and a control unit is provided on the right side of the printer body 1.

[0045] A rectangular groove is provided on the inner bottom wall of the printer body 1, and sliding rods 2 are fixedly installed on the inner walls on both sides of the rectangular groove. There are two sliding rods 2, and the surfaces of the two sliding rods 2 are slidably connected with a fixed block 3 and a T-shaped sliding block 4 respectively. A placement plate 5 is fixedly installed on the upper surface of the fixed block 3, and a sliding groove 10 adapted to the T-shaped sliding block 4 is provided on the lower surface of the placement plate 5. The T-shaped sliding block 4 is slidably connected to the lower surface of the placement plate 5 through the sliding groove 10.

[0046] A forward and reverse motor 6 is fixedly installed on the left inner wall of the rectangular groove, and a threaded rod 11 is fixedly installed on the output end of the forward and reverse motor 6. The end of the threaded rod 11 away from the forward and reverse motor 6 is rotatably connected to the right inner wall of the rectangular groove through a bearing. A connecting block 12 is fixedly installed on the lower surface of the placement plate 5. A threaded hole is opened on the side of the connecting block 12, and the inner wall of the threaded hole is threadedly connected to the surface of the threaded rod 11.

[0047] By setting a fixed block 3, a T-shaped slider 4, a placement plate 5, a forward and reverse motor 6, a threaded rod 11 and a connecting block 12, the 3D printer of the denture model can move the placement plate 5 to the outside of the printer body 1 through the forward and reverse motor 6 when placing the model tool, thereby facilitating the operator to place the model tool.

[0048] A mounting seat 7 is fixedly mounted on the lower surface of the printer body 1 . There are four mounting seats 7 . The four mounting seats 7 are arranged in a rectangular array at the four corners of the printer body 1 .

[0049] A cylindrical groove is provided on the lower surface of the mounting seat 7, and two sliding grooves are provided on the inner wall of the cylindrical groove. The inner walls of the two sliding grooves are slidably connected to a limiting plate 8, and a shock-absorbing spring 13 is fixedly installed on the upper surface of the limiting plate 8. The end of the shock-absorbing spring 13 away from the limiting plate 8 is fixedly connected to the inner top wall of the cylindrical groove.

[0050] An opening is formed on the upper surface of the limiting plate 8 , and a cylindrical rod 9 is fixedly mounted on the inner wall of the opening. One end of the cylindrical rod 9 extends to the upper surface of the limiting plate 8 , and the other end of the cylindrical rod 9 extends to the lower surface of the limiting plate 8 .

[0051] A support seat 14 is fixedly mounted on the bottom end of the cylindrical rod 9 , and a plurality of anti-skid protrusions are fixedly mounted on the lower surface of the support seat 14 . The plurality of anti-skid protrusions are arranged in a rectangular array on the lower surface of the support seat 14 .

[0052] By providing the mounting seat 7, the limiting plate 8, the cylindrical rod 9 and the shock-absorbing spring 13, the 3D printer of the denture model can buffer the vibration generated by the printer body 1 through the shock-absorbing spring 13 during long-term use, thereby improving the stability of the printer body 1 during operation.

[0053] The working principle of the above technical solution is as follows: when 3D printing the denture model, first open the cover 15, start the forward and reverse motor 6, and rotate the threaded rod 11. The rotation of the threaded rod 11 drives the placement plate 5 to slide to the right on the surface of the slide rod 2 through the connecting block 12, so that the placement plate 5 is moved to the outside of the printer body 1, and the model tool is placed on the placement plate 5. The forward and reverse motor 6 is started again to restore the placement plate 5 to its original position and perform 3D laser printing. At the same time, during the long-term use of the 3D printer of the denture model, the vibration generated by the printer body 1 can be buffered by the shock-absorbing spring 13.

[0054] Beneficial effects of the above technical solution: Through the design of the above structure, the present invention provides a specific structure of a 3D printer for a denture model, in which the threaded rod 11 is controlled by a forward and reverse motor 6, and the rotation of the threaded rod 11 drives the placement plate 5 to slide to the right on the surface of the slide rod 2 through the connecting block 12, which facilitates the operator to place the model tool. At the same time, during long-term use, the 3D printer for the denture model can buffer the vibration generated by the printer body 1 through the shock-absorbing spring 13, thereby improving the stability of the printer body 1 during operation.

[0055] See also Figure 1 , Figure 5-Figure 7 In one embodiment, the upper surface of the placement plate 5 is provided with a first slide rail 17, a separation mechanism 18, a first cylinder 19, and a baffle 20;

[0056] The number of the first slide rails 17 is two, the first slide rails 17 are arranged on the upper surface of the placement plate 5, the baffle plate 20 is arranged at the left end of the upper surface of the placement plate 5, the separation mechanism 18 is arranged between the first slide rails 17, the left end of the first cylinder 19 is fixedly connected to the right side of the baffle plate 20, and the right end of the first cylinder 19 is fixedly connected to the left side of the separation mechanism 18;

[0057] The first slide rail 17 includes a main body 17-1, an inclined surface 17-2, and a first track 17-3. The first slide rail main body 17-1 is arranged on the upper surface of the placement plate 5. The number of the inclined surfaces 17-2 is two, and the inclined surfaces 17-2 are arranged at both ends of the first slide rail main body 17-1. The first track 17-3 is arranged on the inner side of the first slide rail main body 17-1. The positions of the two first tracks 17-3 correspond to each other, and the openings are both facing inwards.

[0058] The separation mechanism 18 includes a sliding handle 18-1, a connecting rod 18-2, and a cutting shovel 18-3. The sliding handle 18-1 is slidably connected to the first track 17-3. The sliding handle 18-1 is detachably arranged at both ends of the connecting rod 18-2 by bolts. The right end of the first cylinder 19 is connected to the left side of the connecting rod 18-2. The cutting shovel 18-3 is detachably arranged at the bottom of the connecting rod 18-2 by the bolts. The upper and lower surfaces of the sliding handle 18-1 are respectively provided with grooves 18-4, and the groove 18-4 and the first track 17-3 are filled with round particles.

[0059] The working principle of the above technical solution is as follows: during the 3D printing process, the printed denture model is placed on the upper surface of the placement plate 5, and the cylinder 19 is extended under the support of the baffle 20, thereby driving the separation mechanism 18 to advance to the right front along the upper surface of the placement plate 5 under the guidance of the first slide rail 17, and to the position of the denture model to separate the bottom of the denture model from the placement plate 5; in the process of separating the denture model, the inclined surface 17-2 is set at both ends of the first slide rail body 17-1, and the connecting rod 18-2 is pushed to the right under the action of the cylinder 19, and at the same time, the sliding handle 18-1 is restricted by the first rail 17-3 and moves along the first rail 17-3. Slide to the left, and at the same time, grooves 18-4 are provided on the upper and lower surfaces of the sliding handle 18-1, and round particles are filled between the groove 18-4 and the first track 17-3. The round particles roll relative to the groove 18-4 and the first track 17-3, and the sliding friction generated by the groove 18-4 and the first track 17-3 is converted into relative rolling. The sliding handle 18-1 is detachably arranged at both ends of the connecting rod 18-2 by bolts, and the cutting shovel 18-3 is detachably arranged at the bottom of the connecting rod 18-2 by bolts. When the cutting shovel 18-3 or the connecting rod 18-2 is worn, they can be disassembled and replaced respectively.

[0060] Beneficial effects of the above technical solution: through the design of the above structure, the present embodiment provides a first slide rail 17, a separation mechanism 18, a cylinder 19, and a baffle 20. The baffle 20 provides support for the cylinder 19, and the first slide rail 17 provides guidance for the separation mechanism 18, thereby driving the separation mechanism 18 to quickly separate the denture model from the placement plate 5 under the drive of the cylinder 19 and the guidance of the first slide rail 17, thereby avoiding the denture model from being too tightly adhered to the surface of the placement plate 5 and being unable to be removed by manpower, and at the same time avoiding damage to the placement plate 5 or the denture model caused by using other sharp objects to separate the denture model; through the design of the above structure, the present invention provides a specific structure of the first slide rail 17 and the separation mechanism 18, through the slide handle 18-1 and the first rail 17-3 The connecting rod 18-2 and the cutting shovel 18-3 are limited and guided by cooperation, ensuring that the cutting shovel 18-3 can act accurately and smoothly between the denture model and the placement plate 5. The groove 18-4 and the first track 17-3 are filled with round particles, and the round particles roll relative to the groove 18-4 and the first track 17-3, converting the sliding friction generated by the sliding handle 18-1 and the first track 17-3 into relative rolling, which greatly reduces the friction and thus reduces the wear of the sliding handle 18-1, increases the service life, and reduces economic losses. The cutting shovel 18-3 and the connecting rod 18-2 are both detachable. When wear occurs, they can be disassembled and replaced in time to achieve recycling and reduce costs. The structure is simple and easy to disassemble and produce.

[0061] See also Figure 1 , Figure 8-Figure 10In one embodiment, a dust removal mechanism 21 and a support mechanism 22 are further provided above the placement plate 5, and the dust removal mechanism 21 is provided at the bottom of the support mechanism 22;

[0062] The support mechanism 22 includes a second slide rail 22-1, a slide plate 22-2, a second cylinder 22-3, and a third cylinder 22-4;

[0063] There are two second slide rails 22-1, which are respectively arranged on the inner side walls of the printer body 1 and correspond to each other. A second rail 22-5 is arranged inside the second slide rail 22-1, and the slide plate 22-2 is slidably connected to the second rail 22-5. The rear end of the second cylinder 22-3 is fixedly connected to the inner side wall of the printer body 1, and the front end of the second cylinder 22-3 is fixedly connected to the side of the slide plate 22-2. The third cylinder 22-4 is arranged at the bottom of the slide plate 22-2, and the dust removal mechanism 21 is arranged at the bottom of the third cylinder 22-4.

[0064] The dust removal mechanism 21 includes a mechanism body 21-1, a guide path 21-3, a conveying end 21-4, a brush plate 21-5, a leak-proof passage 21-6, a collecting device 21-9, a spare collecting device 21-7, and a suction device 21-8;

[0065] The guide path 21-3 is arranged inside the mechanism body 21-1, and a plurality of dust collecting holes 21-2 are arranged at the bottom of the mechanism body 21-1. The conveying end 21-4 is arranged at the upper end of the mechanism body 21-1. The leak-proof passage 21-6 is arranged at the bottom center of the mechanism body 21-1. The dust collecting holes 21-2, the conveying end 21-4 and the leak-proof passage 21-6 are respectively connected to the guide path 21-3. The brush plate 21-5 is arranged at the bottom of the mechanism body 21-1, and the brush plate 21-5 is connected by a motor control. The standby collecting device 21-7 is arranged at the bottom of the leak-proof passage 21-6. The collecting device 21-9 is arranged on the side of the mechanism body 21-1 and is connected to the conveying end 21-4. The suction device 21-8 is arranged between the collecting device 21-9 and the conveying end 21-4. The top of the mechanism body 21-1 is fixedly connected to the third cylinder 22-4.

[0066] The working principle of the above technical solution is as follows: before printing or after the denture model is taken out after printing, the 3D printing area needs to be cleaned. During the cleaning process, the second cylinder 22-3 pushes out the slide 22-2, and the slide 22-2 slides parallel to the second track 22-5 on the second slide rail 22-1 to the position required for cleaning; after being in place, the third cylinder 22-4 extends, and at the same time, the third cylinder 22-4 drives the dust removal mechanism 21 to move downward, so that the dust removal mechanism 21 contacts the surface to be cleaned on the upper surface of the placement plate 5 for cleaning. When the cleaning is completed, the third cylinder 22-4 retracts and drives the dust removal mechanism 21 to move upward. After moving to the highest position, the second cylinder 22-3 retracts, thereby driving the slide 22-2 and the dust removal mechanism 21 to reset; during the dust removal process of the dust removal mechanism 21, the motor drives the brush plate 21-5 to rotate around the center as the axis. The brush plate 21-5 performs the first step of cleaning on the surface of the placement plate 5. When the brush plate 21-5 brushes off the fine chips and dust, the suction device 21-8 performs suction, and the fine chips and dust enter the guide path 21-3 in the mechanism body 21-1 from the dust collecting hole 21-2. The guide path 21-3 then transports the fine chips and dust to the collecting device 21-9 through the conveying end 21-4. At this time, the spare collecting device 21-7 protrudes upward under the action of the suction force; when the suction is completed, a small amount of fine chips and dust remaining in the guide path 21-3 falls back to the leak-proof passage 21-6 due to the loss of the suction force. At this time, the spare collecting device 21-7 falls back downward under the action of gravity to form a space, and then the leak-proof passage 21-6 transports the fine chips and dust to the spare collecting device 21-7 to prevent the fallen fine chips and dust from secondary contamination of the processing area.

[0067] Beneficial effects of the above technical solution: Through the design of the above structure, this embodiment provides a specific structure of the dust removal mechanism 21 and the supporting mechanism 22. The second cylinder 22-3 acts on the side wall of the slide plate 22-2 to drive the dust removal mechanism 21 to move to the clean area or reset. The third cylinder 22-4 acts on the dust removal mechanism 21 to control the upward and downward movement of the dust removal mechanism 21, so as to achieve the contact and separation of the dust removal mechanism 21 with the clean area on the upper surface of the placement plate 5. The dust removal mechanism 21 can clean fine dust through the brush plate 21-5, and at the same time With the assistance of the suction device 21-8, the cleaning effect is guaranteed to a great extent. At the same time, under the action of the backup collection device 21-7 and the leak-proof passage 21-6, it is further prevented that after the suction is completed, a small amount of fine chips and dust remaining in the guide path 21-3 will fall downward due to the loss of suction force, causing secondary pollution of the processing area by fine chips and dust, thereby avoiding the contamination of the denture model by dust and fine chips during the 3D printing process, and further preventing fine chips from adhering to the model surface during the printing process, which is difficult to remove after the model is formed and affects the surface quality of the model.

[0068] See also Figure 1The printer body 1 has a built-in scanning program to realize printing, and the scanning program is realized according to a predetermined method. The steps of the predetermined method are as follows:

[0069] Step 1: Calculate the path after 3D printing compensation according to the following formula:

[0070]

[0071] Where: a is the constant of the path straight line equation after compensation, l r To compensate for the radius, N1 and N2 are the constants of the straight line equations of two adjacent intersecting paths;

[0072] Step 2, according to the compensated paths in step 1, the intersection coordinates are obtained by combining them, and the built-in scanning program of the printer body 1 is controlled to establish a model according to the compensated intersection coordinates.

[0073] The working principle and beneficial effects of the above technical solution: During the 3D printing process, the printer body 1 performs compensation calculation on the printing path through step 1, obtains the compensated intersection coordinates by combining the formula given in step 1, and confirms the accurate denture model contour based on the intersection coordinates, making the processed denture model more accurate, thereby improving the model quality and improving the model printing efficiency.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printer for denture models, characterized in that: include: A printer body (1), wherein a rectangular groove is provided on the inner bottom wall of the printer body (1), and slide bars (2) are fixedly installed on the inner walls of both sides of the rectangular groove, and the number of the slide bars (2) is two, and the surfaces of the two slide bars (2) are respectively slidably connected with a fixed block (3) and a T-shaped slide block (4), and the upper surface of the fixed block (3) is fixedly installed with a placement plate (5), and a forward and reverse motor (6) is fixedly installed on the left inner wall of the rectangular groove, and a mounting seat (7) is fixedly installed on the lower surface of the printer body (1), and a cylindrical groove is provided on the lower surface of the mounting seat (7), and two sliding grooves are provided on the inner wall of the cylindrical groove, and the inner walls of the two sliding grooves are slidably connected with a limit plate (8), and the upper surface of the limit plate (8) is provided with an opening, and a cylindrical rod (9) is fixedly installed on the inner wall of the opening, and one end of the cylindrical rod (9) extends to the upper surface of the limit plate (8), and the other end of the cylindrical rod (9) extends to the lower surface of the limit plate (8); The upper surface of the placement plate (5) is provided with a first slide rail (17), a separation mechanism (18), a first cylinder (19), and a baffle (20); The number of the first slide rails (17) is two, the first slide rails (17) are arranged on the upper surface of the placement plate (5), the baffle plate (20) is arranged at the left end of the upper surface of the placement plate (5), the separation mechanism (18) is arranged between the first slide rails (17), the left end of the first cylinder (19) is fixedly connected to the right side of the baffle plate (20), and the right end of the first cylinder (19) is fixedly connected to the left side of the separation mechanism (18); The first slide rail (17) comprises a first slide rail body (17-1), an inclined surface (17-2), and a first track (17-3); the first slide rail body (17-1) is arranged on the upper surface of the placement plate (5); there are two inclined surfaces (17-2); the inclined surfaces (17-2) are arranged at both ends of the first slide rail body (17-1); the first track (17-3) is arranged on the inner side of the first slide rail body (17-1); the positions of the two first tracks (17-3) correspond to each other, and the openings of the two first tracks are both facing inwards; The separation mechanism (18) comprises a sliding handle (18-1), a connecting rod (18-2), and a cutting shovel (18-3); the sliding handle (18-1) is slidably connected to the first track (17-3); the sliding handle (18-1) is detachably arranged at both ends of the connecting rod (18-2) by bolts; the right end of the first cylinder (19) is connected to the left side of the connecting rod (18-2); the cutting shovel (18-3) is detachably arranged at the bottom of the connecting rod (18-2) by bolts; the upper surface and the lower surface of the sliding handle (18-1) are respectively provided with grooves (18-4); and the space between the groove (18-4) and the first track (17-3) is filled with round particles; A dust removal mechanism (21) and a support mechanism (22) are also provided above the placement plate (5), and the dust removal mechanism (21) is provided at the bottom of the support mechanism (22); The supporting mechanism (22) comprises a second slide rail (22-1), a slide plate (22-2), a second cylinder (22-3), and a third cylinder (22-4); There are two second slide rails (22-1), which are respectively arranged on the inner side wall of the printer body (1) and correspond to each other, a second rail (22-5) is arranged inside the second slide rail (22-1), the slide plate (22-2) is slidably connected to the second rail (22-5), the rear end of the second cylinder (22-3) is fixedly connected to the inner side wall of the printer body (1), the front end of the second cylinder (22-3) is fixedly connected to the side of the slide plate (22-2), the third cylinder (22-4) is arranged at the bottom of the slide plate (22-2), and the dust removal mechanism (21) is arranged at the bottom of the third cylinder (22-4); The dust removal mechanism (21) comprises a mechanism body (21-1), a guide path (21-3), a conveying end (21-4), a brush plate (21-5), a leak-proof passage (21-6), a collecting device (21-9), a spare collecting device (21-7), and a suction device (21-8); The guide path (21-3) is arranged inside the mechanism body (21-1); a plurality of dust collecting holes (21-2) are arranged at the bottom of the mechanism body (21-1); the conveying end (21-4) is arranged at the upper end of the mechanism body (21-1); the anti-leakage passage (21-6) is arranged at the bottom center of the mechanism body (21-1); the dust collecting holes (21-2), the conveying end (21-4), and the anti-leakage passage (21-6) are respectively connected to the guide path (21-3); and the brush plate (21-5) is arranged at the bottom of the mechanism body (21-1). The brush plate (21-5) is connected to the bottom of the mechanism body (21-1) by a motor control, the standby collecting device (21-7) is arranged at the bottom of the anti-leakage passage (21-6), the collecting device (21-9) is arranged on the side of the mechanism body (21-1) and is conductively connected to the conveying end (21-4), the suction device (21-8) is arranged between the collecting device (21-9) and the conveying end (21-4), and the top of the mechanism body (21-1) is fixedly connected to the third cylinder (22-4); The standby collecting device (21-7) bulges upwards under the action of the suction force; when the suction is finished, the standby collecting device (21-7) falls back downwards under the action of gravity to form a space.

2. A 3D printer for denture models according to claim 1, characterized in that: The lower surface of the placement plate (5) is provided with a slide groove (10) adapted to the T-shaped slider (4), and the T-shaped slider (4) is slidably connected to the lower surface of the placement plate (5) via the slide groove (10).

3. A 3D printer for denture models according to claim 1, characterized in that: A threaded rod (11) is fixedly mounted on the output end of the forward and reverse motor (6); one end of the threaded rod (11) away from the forward and reverse motor (6) is rotatably connected to the right inner wall of the rectangular groove via a bearing; a connecting block (12) is fixedly mounted on the lower surface of the placement plate (5); a threaded hole is provided on the side surface of the connecting block (12); and the inner wall of the threaded hole is threadedly connected to the surface of the threaded rod (11).

4. A 3D printer for denture models according to claim 1, characterized in that: The number of the mounting seats (7) is four, and the four mounting seats (7) are arranged in a rectangular array at the four corners of the printer body (1).

5. The 3D printer for denture models according to claim 1, characterized in that: A shock absorbing spring (13) is fixedly mounted on the upper surface of the limiting plate (8), and one end of the shock absorbing spring (13) away from the limiting plate (8) is fixedly connected to the inner top wall of the cylindrical groove.

6. A 3D printer for denture models according to claim 1, characterized in that: A support seat (14) is fixedly mounted on the bottom end of the cylindrical rod (9), and anti-skid protrusions are fixedly mounted on the lower surface of the support seat (14). The number of the anti-skid protrusions is several, and the several anti-skid protrusions are arranged in a rectangular array on the lower surface of the support seat (14).

7. A 3D printer for denture models according to claim 1, characterized in that: The right side of the printer body (1) is rotatably connected to a cover plate (15) via a hinge, a handle (16) is provided on the side of the cover plate (15), a surface of the handle (16) is covered with an anti-slip rubber sleeve, and a control unit is provided on the right side of the printer body (1).

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