A light-curing 3D printer with disturbance function

Abstract

This application is a divisional application, and the application number of the original application is 2024103563435. This application discloses a light-curing 3D printer with a disturbance function, on the workbench of which a material tank for containing liquid materials is installed, a disturber is arranged in the material tank, the disturber includes a cylinder fixed in the material tank and a piston slidably installed in the cylinder, and the piston rod is connected to the piston; a driver is installed on the workbench, and the driver can drive the piston to slide in the cylinder through the piston rod, suck the liquid material in the material tank into the cylinder or spray the liquid material in the cylinder, and disturb the liquid material in the material tank. This application uses a disturber to suck the liquid material around the disturber into the cylinder, and spray it in a direction away from the disturber, disturbing and mixing the liquid material, avoiding the sedimentation of solid particles in the liquid material, and avoiding the liquid material from tending to solidify due to the accumulation of irradiated light energy.

Description

[0001] This application is a divisional application. The application date of the original application is March 27, 2024. The application number is 2024103563435. The name of the invention is: A light-curing 3D printer. Technical Field

[0002] The invention relates to a light-curing 3D printer with a disturbance function. Background Art

[0003] The rapid development of 3D printing technology has revolutionized the production methods of current products. In the top-down light-curing 3D printing technology, which uses a light source to cure liquid materials to form three-dimensional products, the printing platform is immersed in a material tank containing liquid materials. The light source irradiates the liquid material in the material tank to cure the liquid material and gradually stack it onto the printing platform. At the same time, the printing platform is moved upward layer by layer in the vertical direction, so that the liquid material can be cured layer by layer and finally stacked to form a three-dimensional product.

[0004] During the printing process, due to the sedimentation of solid particles in the liquid material, temperature changes, and the continuous accumulation of the energy of the irradiated light in the liquid material, some of the liquid materials undergo qualitative changes. After a long period of accumulation, some of the liquid materials may solidify, thereby affecting the continued progress of subsequent printing. Therefore, during the 3D printing process, it is necessary to stir the liquid material in the material tank to make the liquid material in the material tank flow and avoid solidification. To this end, people have added a swing rod at the bottom of the material tank to stir the liquid material between the solidified layer attached to the printing platform and the bottom of the material tank. However, the swing rod can only swing after completing a solidified layer and lifting the printing platform upward to make the solidified layer attached to the printing platform separate from the bottom of the material tank, so as to stir the liquid material in the material tank, thereby affecting the printing speed and reducing the production efficiency of three-dimensional products. Therefore, how to disturb the liquid material in the material tank without affecting the printing efficiency still needs further research. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a light-curing 3D printer with a disturbance function, which includes a workbench, on which a material trough is fixedly installed, the material trough is used to hold liquid material, at least one disturber is arranged in the material trough, each disturber includes a cylinder fixed in the material trough and a piston slidably installed in the cylinder, and a piston rod is connected to the piston; a driver is installed on the workbench, and the driver can drive the piston to slide in the cylinder through the piston rod, so as to suck the liquid material in the material trough into the cylinder or spray the liquid material in the cylinder, thereby disturbing the liquid material in the material trough.

[0006] In the present application, a disturber is provided in the material tank, which has a structure similar to that of a piston pump. The disturber is used to suck the liquid material around the disturber into the cylinder, and then ejected and flows in a direction away from the disturber, thereby disturbing the liquid material in the material tank, so as to mix the liquid materials in various places in the material tank, and avoid the liquid material in the material tank from being in a stable state, thereby avoiding the sedimentation of solid particles in the liquid material due to the liquid always being in a stable state. At the same time, since the liquid material in the material tank is disturbed, it is possible to avoid the liquid material in a certain area of ​​the material tank from tending to solidify due to the accumulation of irradiated light energy. The disturber in the present application can be provided in an area of ​​the material tank that does not affect printing, so as to avoid affecting the printing speed, and can complete the disturbance of the liquid material in the material tank.

[0007] Furthermore, an end plate is provided at each end of the cylinder, and the piston rod freely passes through the end plates at both ends of the cylinder. The piston divides the inner cavity of the cylinder into a first chamber and a second chamber, and a first inlet and outlet connected to the first chamber and a second inlet and outlet connected to the second chamber are provided on the cylinder wall of the cylinder. This design enables the liquid material in the cylinder to be sprayed toward the central part of the trough, avoiding the situation that the disturber can only strongly disturb the liquid material around it, but has a small disturbance on the liquid material in the central area of ​​the trough, and cannot effectively push the liquid material in the surrounding area of ​​the trough to the central area of ​​the trough, resulting in the inability of the liquid material in the trough to generate sufficient effective flow.

[0008] Furthermore, to ensure that the liquid material in the central area of ​​the trough is disturbed, the first inlet and the second inlet are both oriented horizontally toward the central part of the trough. The liquid material sprayed from the first inlet or the second inlet can flow radially toward the central part of the trough. During the reciprocating movement of the piston, the disturber sucks the surrounding liquid material into the cylinder and then sprays it toward the central part of the trough, thereby fully disturbing the liquid material in the entire trough.

[0009] Specifically, the trough is circular, and a plurality of perturbators are arranged in the trough, and the perturbators are evenly spaced around the central axis of the trough. The cylinder of each perturbator is arc-shaped, and the center of the center line of the cylinder is located on the central axis of the trough. The piston rods of the perturbators are connected end to end to form a ring, and the ring is coaxially arranged with the trough. This design enables the piston rods of the perturbators to be connected as a whole, and the driver is only connected to the piston rod of one perturbator to drive all the pistons, thereby simplifying the structure of the device.

[0010] Specifically, each perturbator is located radially outside the material tank. This design enables the central area of ​​the material tank to become the setting area of ​​the printing platform, and the perturbator will not interfere with the printing platform and affect the normal operation of the printing platform. In addition, when the perturbator is working, the liquid material on the radial outside of the material tank is sucked into the cylinder of the perturbator and then sprayed into the central area of ​​the material tank, thereby fully disturbing the liquid material in the material tank to avoid the sedimentation of solid particles in the liquid material and reduce the tendency of the liquid material to undergo qualitative changes due to temperature changes and the continuous accumulation of irradiation light energy in the liquid material.

[0011] Furthermore, the driver includes an arc-shaped slide rail fixed on the workbench, the center of the slide rail is located on the central axis of the material tank, the slide plate is slidably mounted on the slide rail, and an arc-shaped rack is fixedly mounted on the slide plate or the workbench; the drive motor is fixedly mounted on the workbench, and a gear is mounted on the output shaft of the drive motor, and the gear is meshed with the arc-shaped rack; the ring is fixedly connected to the slide plate or the arc-shaped rack, and under the drive of the drive motor, the gear can drive the slide plate to reciprocate along the slide rail through the arc-shaped rack, and drive the piston to reciprocate in the cylinder through the ring. The drive motor drives the gear, and thereby drives the arc-shaped rack to reciprocate along the slide rail, thereby driving the piston to move in the cylinder through the piston rod, and disturbing the liquid material in the material tank. By adjusting the speed of the drive motor, the moving speed of the piston in the cylinder can be adjusted, and the flow speed of the liquid material ejected from the cylinder can be adjusted, thereby adjusting the disturbance amplitude of the liquid material in the material tank.

[0012] Furthermore, for the convenience of control, two limit devices are installed on the slide rail or the workbench. The two limit devices are respectively located on both sides of the axial direction of the slide. When the slide moves back and forth on the slide rail, the two limit devices can limit the range of motion of the slide. The two limit devices and the drive motor are electrically connected to the central processing controller. The limit device can specifically adopt a photoelectric switch, a mechanical travel switch, or a matching limit switch such as a Hall switch and a magnet. The limit device is used to achieve automatic control of the movement of the slide rail and improve work efficiency.

[0013] Furthermore, the driver includes an externally-toothed slewing bearing and a driving motor, the externally-toothed slewing bearing includes an outer ring and an inner ring connected together by balls, the inner ring is fixed on a workbench, the outer ring has teeth protruding radially outward, and the externally-toothed slewing bearing is coaxially arranged with the material trough; the driving motor is fixed on the workbench, a gear is installed on the output shaft of the driving motor, the gear is meshed on the outer ring, and the outer ring is connected to the circular ring; under the drive of the driving motor, the outer ring can drive the circular ring to swing back and forth around the central axis of the material trough, and synchronously drive the piston to move back and forth in the cylinder.

[0014] The drive motor drives the gears, thereby driving the outer ring to reciprocate around the inner ring, thereby driving the piston to move in the cylinder through the piston rod to disturb the liquid material in the tank. By adjusting the speed of the drive motor, the moving speed of the piston in the cylinder can be adjusted, and the flow speed of the liquid material ejected from the cylinder can be adjusted, thereby adjusting the disturbance amplitude of the liquid material in the tank.

[0015] Furthermore, a contact rod is fixedly mounted on the outer ring, and a limit device is respectively arranged on both sides of the contact rod along the circumferential direction of the external gear slewing bearing. The two limit devices are fixedly mounted on the workbench and are not connected to the outer ring. The two limit devices can limit the rotation range of the outer ring. The two limit devices and the drive motor are electrically connected to the central processing controller. The limit device can specifically adopt a photoelectric switch, a mechanical travel switch, or a matching limit switch such as a Hall switch and a magnet. The limit device is used to achieve automatic control of the rotation of the outer ring and improve work efficiency.

[0016] Furthermore, in order to ensure smooth printing, a printing platform is also included. The bottom surface of the material trough is divided into a working area and a non-working area. The working area is located in the central part of the bottom surface of the material trough, and the non-working area surrounds the working area. The printing platform can enter the material trough in a vertical direction and is located in the working area. The perturbator is located in the non-working area. Setting the working area and the non-working area can make the functions of each area in the material trough clearer. The working area is used to accommodate the printing platform, and the non-working area is used to accommodate the perturbator, so as to avoid the perturbator from affecting the normal operation of the printing platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of Example 1 of the present application.

[0018] Figure 2 yes Figure 1 Center AA view.

[0019] Figure 3 yes Figure 2 View from the center BB direction.

[0020] Figure 4 yes Figure 3 View from the CC direction.

[0021] Figure 5 yes Figure 3 View from the center DD direction.

[0022] Figure 6 yes Figure 1 Electrical relationship diagram of some components of a light-curing 3D printer.

[0023] Figure 7 It is a structural diagram of Example 2 of the present application.

[0024] Figure 8 yes Figure 7 The view from the EE direction. DETAILED DESCRIPTION

[0025] Example 1

[0026] See also Figure 1-Figure 6 A light-curing 3D printer with a disturbance function includes a workbench 10, which includes a vertical wall 11 extending in a vertical direction and in a rectangular cylindrical shape, a bottom plate 12 installed at the bottom of the vertical wall, and a top plate 13 installed at the top of the vertical wall. A liquid crystal screen 18 is installed in the center of the top plate, and an ultraviolet light system 14 is installed in the inner cavity of the workbench. The ultraviolet light emitted by the ultraviolet light system can irradiate the liquid crystal screen. In this embodiment, the ultraviolet light system adopts existing mature technology and will not be repeated.

[0027] A transmission mechanism is installed on the workbench, which includes two columns 15 installed on the top plate of the workbench. The two columns 15 are symmetrically arranged along the liquid crystal screen 18. A lifting motor 21 is installed at the bottom of each column, and a ball screw 22 extending in the vertical direction is installed on the output shaft of each lifting motor 21. The two ends of the beam 16 are respectively installed on a ball screw, and a printing platform 17 is installed on the lower side of the beam. Driven by the lifting motor, the beam can move up and down along the ball screw and drive the printing platform to move up and down. The lifting motor 21 specifically adopts a servo motor. The specific transmission mechanism can be learned from the prior art and will not be repeated here.

[0028] A material trough 31 is fixedly mounted on the top plate of the workbench. The material trough is circular and has a central axis 311 extending in the vertical direction. The material trough is located on the liquid crystal screen and is used to contain liquid materials. The material trough includes an annular outer wall 313 and a bottom surface 312 connected to the lower end of the outer wall. A flange 314 protruding outward is provided on the outer peripheral surface of the lower end of the outer wall. Bolts are fixed to the material trough on the top plate through flange holes 315 on the flange.

[0029] Six perturbators 40 are arranged in the trough, and the six perturbators 40 are evenly spaced around the central axis of the trough, and each perturbator 40 includes a cylinder 41 and a piston 47 arranged in the cylinder 41, and a piston rod 48 is fixedly connected to the piston 47. The radial cross section of the cylinder is annular, and the cylinder is in an arc shape, that is, the cylinder is an arc bent pipe, and the center line 414 of the cylinder is an arc line, and the center of the center line 414 of the cylinder is located on the central axis 311 of the trough.

[0030] The piston rods of the disturbers are connected end to end to form a circular ring 49, which is coaxially arranged with the material trough, that is, the center of the circular ring is located on the central axis 311 of the material trough.

[0031] A first end plate 42 and a second end plate 43 are welded at both ends of each cylinder 41, that is, an end plate is provided at both ends of the cylinder. A guide rod hole is provided at the center of the first end plate and the second end plate, and the piston rod 48 freely passes through the guide rod hole and is connected to the piston 47. The piston 47 divides the inner cavity of the cylinder into a first chamber 411 and a second chamber 412. A first inlet and outlet 44 and a second inlet and outlet 45 are provided on the cylinder wall of the cylinder, wherein the first inlet and outlet are located on the side of the cylinder close to the first end plate and connected to the first chamber, and the second inlet and outlet are located on the side of the cylinder close to the second end plate and connected to the second chamber. In this embodiment, the first inlet and outlet and the second inlet and outlet both extend along the radial direction of the trough, so that the first inlet and outlet and the second inlet and outlet both face the central part of the trough in the horizontal direction.

[0032] The bottom surface of the trough is divided into a working area 316 and a non-working area 317. Figure 2 In the figure, the working area 316 and the non-working area 317 are divided by a double-dotted line 318, wherein the working area is located in the central part of the bottom surface of the material tank, and the non-working area surrounds the working area. The printing platform 17 can enter the material tank in the vertical direction and be located in the working area 316. Figure 2 In the figure, the dotted line indicates the position of the printing platform 17 in the material tank. The perturbators are located in the non-working area, that is, each perturbator is located radially outside the material tank. Specifically in this embodiment, the barrel of each perturbator is fixed to the inner circumference of the material tank via a clamp 413 to facilitate the disassembly of the perturbator, wherein the clamp is welded to the inner circumference of the outer wall of the material tank, and the outer wall of the material tank is made of stainless steel.

[0033] A first driver 50 is installed on the workbench, and the first driver includes an arc-shaped slide rail 52 fixed on the upper surface 131 of the top plate, the center of the slide rail 52 is located on the central axis of the material trough, and a slide plate 525 is slidably installed on the slide rail. Specifically in this embodiment, the slide plate is a horizontal plate, and a roller group is respectively installed on the opposite sides of the slide plate, each roller group includes two rollers 523, and the two rollers of the same roller group have the same height. Each roller is rotatably installed below the slide plate via a rotating shaft 524, and a slide groove 522 is respectively provided on the inner and outer sides of the radial direction of the slide rail, and the slide groove is horizontally arranged, and the two rollers of one roller group are clamped in the slide groove on the radial inner side of the slide rail, and the two rollers of the other roller group are clamped in the slide groove on the radial outer side of the slide rail, so that the slide plate is slidably installed on the slide rail.

[0034] An arc-shaped rack 51 is welded on the upper side of the slide plate, and a first drive motor 54 is fixedly mounted on the lower side of the top plate. The output shaft of the first drive motor extends upward and is fixedly mounted with a first gear 55 after freely passing through the top plate. The first gear is meshed with the arc-shaped rack. Specifically in this embodiment, the teeth of the arc-shaped rack are located at the radial outer end of the arc-shaped rack, and the first gear is located at the radial outer side of the arc-shaped rack. It can be understood that in another embodiment, the teeth of the arc-shaped rack can also be located at the radial inner end of the arc-shaped rack, and the first gear is located at the radial inner side of the arc-shaped rack. Of course, the teeth of the arc-shaped rack can also be located on the upper side of the arc-shaped rack. In this case, the first gear needs to be changed accordingly.

[0035] A first connecting member 56 is provided on the arc-shaped rack, and a connecting plate 561 is welded at the end of the first connecting member. The connecting plate 561 is fixed to the arc-shaped rack by bolts. The first connecting member extends into the material trough and is connected to the circular ring 49. Driven by the first driving motor, the first gear can drive the rack to move back and forth along the slide rail, and drive the piston to move back and forth in the cylinder through the circular ring. It can be understood that in another embodiment, the first connecting member can also be connected to the slide plate, so that the slide plate is connected to the circular ring through the first connecting member.

[0036] During the reciprocating movement of the piston in the cylinder, when the piston shrinks the first chamber and expands the second chamber, the liquid material in the first chamber can be ejected radially from the material trough through the first inlet and outlet, and the liquid material in the material trough can enter the second chamber through the second inlet and outlet; when the piston shrinks the second chamber and expands the first chamber, the liquid material in the second chamber can be ejected radially from the material trough through the second inlet and outlet, and the liquid material in the material trough can enter the second chamber through the first inlet and outlet; this is repeated to disturb the liquid material in the material trough. The first drive motor is specifically a servo motor.

[0037] In order to facilitate the control of the sliding range of the slide 525, two limit devices are installed on the slide rail. The two limit devices are respectively located on the opposite sides of the slide. In this embodiment, the two limit devices are mechanical travel switches. For the convenience of description, the two mechanical travel switches are respectively referred to as the first travel switch 526 and the second travel switch 527. It can be understood that in other embodiments, the limit device can also use a mechanical travel switch or a matching Hall switch and magnet. In this embodiment, the moving angle range of the slide on the slide rail is 25°. It can be understood that in other embodiments, the moving angle range of the slide can be set according to the number of disruptors arranged and the angle between adjacent disruptors relative to the central axis of the trough.

[0038] The two mechanical limit switches and the first drive motor are electrically connected to the first central processing controller, which specifically adopts a 32-bit PLC programmable controller. When the slide touches one of the mechanical limit switches during movement, the mechanical limit switch sends information to the first central processing controller. After receiving the information from the mechanical limit switch, the first central processing controller controls the rotation direction of the first drive motor to reverse, so that the slide moves in another direction.

[0039] The following combination Figure 2 To explain, Figure 2 In the figure, arrow X indicates the forward movement of the slide plate, and the opposite is reverse movement. The first drive motor is started, and the first drive motor drives the arc rack to rotate and moves the slide plate in the direction of the first stroke switch, that is, the slide plate moves in the forward direction; when the slide plate touches the first stroke switch, the first central processing controller issues a command to reverse the rotation direction of the first drive motor, so that the arc rack drives the slide plate to move in the direction of the second stroke switch, that is, the slide plate moves in the reverse direction; when the slide plate touches the second stroke switch, the first central processing controller issues a command to reverse the rotation direction of the first drive motor 54 again, so that the arc rack drives the slide plate to move in the direction of the first stroke switch, that is, the slide plate moves in the forward direction, and so on.

[0040] In this embodiment, the limit device specifically adopts a mechanical travel switch. It can be understood that in other embodiments, a photoelectric switch or a matching Hall switch and a magnet and other limit switches can also be used. The mechanical travel switch in this embodiment is specifically installed on the slide rail. When a photoelectric switch or a matching Hall switch and a magnet and other limit switches are used, the limit switch can also be installed on the workbench. Of course, the mechanical travel switch can also be installed on the workbench through other connecting parts, and the mechanical travel switch is located on the track of the slide or the arc rack so that the slide or the arc rack can touch the mechanical travel switch.

[0041] Example 2

[0042] See also Figure 7 and Figure 8 , Figure 7 and Figure 8 Zhongyu Figure 1-Figure 6The same reference numerals in the figure represent the same structural components. This embodiment is a variation of the embodiment 1, and the difference lies in the difference in the driver. For the convenience of description, in this embodiment, the driver is called a second driver 70. The second driver 70 includes an outer gear slewing bearing 60 and a second drive motor 72. The outer gear slewing bearing 60 includes an outer ring 62 and an inner ring 61 that are combined together by balls 63. The inner ring 61 fixes the locking bolt 64 on the workbench. The outer ring 62 has teeth protruding radially outward, so that the outer ring forms an outer gear ring. The outer gear slewing bearing 60 is coaxially arranged with the material trough. The second drive motor 72 is fixed on the workbench and located on the lower side of the top plate. The second gear 71 is fixedly mounted on the output shaft of the second drive motor 72, and the second gear 71 is meshed with the outer ring 62. A second connecting member 65 is fixedly mounted on the outer ring via a connecting bolt 66. The second connecting member extends into the material trough and is connected to the ring 49. Driven by the second driving motor 72, the outer ring can drive the circle to swing back and forth around the central axis of the trough through the second connecting piece, and synchronously drive the piston to move back and forth in the cylinder.

[0043] In order to avoid interference with the installation of the material trough and facilitate operation, in this embodiment, an annular groove 19 is opened on the top plate of the workbench. When viewed in the vertical direction, the annular groove 19 extends around the material trough 31. The annular groove 19 penetrates the upper surface 131 of the top plate upward. The external gear slewing bearing is installed in the annular groove, and the external gear slewing bearing does not exceed the upper surface of the top plate upward.

[0044] In this embodiment, the second connecting member 65 is used as a feeler rod, and a limit device is provided on both sides of the second connecting member along the circumferential direction of the external gear slewing bearing. In this embodiment, the two limit devices are both E3F-DS30C4 diffuse reflection type photoelectric switches. For the convenience of description, the two photoelectric switches are respectively referred to as the first photoelectric switch 81 and the second photoelectric switch 82. The first photoelectric switch 81 and the second photoelectric switch 82 are respectively located on both sides of the second connecting member 65 and installed on the upper surface of the top plate and are not connected to the outer ring. In the radial direction of the trough, the two photoelectric switches are both located on the radial outer side of the second connecting member 65, and the detection light of the two photoelectric switches is irradiated along the radial direction of the trough toward the central axis of the trough. In this embodiment, the angle α between the line 83 connecting the two photoelectric switches and the central axis 311 of the trough is 25°, so that the rotation amplitude range of the outer ring is 25°. Figure 8 In the figure, for clarity, the central axis 311 of the trough is represented by a small circle.

[0045] The two photoelectric switches and the second drive motor are electrically connected to the second central processing controller. The connection relationship between the two photoelectric switches, the second drive motor and the second central processing controller can be referred to Figure 6The second central processing controller specifically adopts a 32-bit PLC programmable controller. When the outer ring is rotating, when the second connecting piece reaches the optical path of the detection light of one of the photoelectric switches, the photoelectric switch sends information to the second central processing controller. After receiving the information from the photoelectric switch, the second central processing controller controls the rotation direction of the second drive motor to reverse, so that the outer ring moves in another direction.

[0046] The following combination Figure 8 To explain, Figure 8 In the figure, arrow P indicates the positive rotation of the outer ring, and the opposite is the reverse rotation. The second drive motor 72 is started, and the second drive motor drives the outer ring to rotate and moves the second connecting member toward the direction of the first photoelectric switch, that is, the outer ring rotates forward; when the outer ring reaches the optical path of the detection light of the first photoelectric switch, the second central processing controller issues a command to reverse the rotation direction of the second drive motor, so that the outer ring drives the second connecting member to move toward the direction of the second photoelectric switch, that is, the outer ring rotates reversely; when the outer ring reaches the optical path of the detection light of the second photoelectric switch, the second central processing controller issues a command to reverse the rotation direction of the second drive motor again, so that the outer ring drives the second connecting member to rotate toward the direction of the first photoelectric switch, that is, the outer ring rotates forward, and this is repeated.

[0047] In this embodiment, the two photoelectric switches are directly mounted on the workbench. It can be understood that in another embodiment, the two photoelectric switches can also be mounted on the inner ring. Since the inner ring is fixed on the workbench, the two photoelectric switches can be indirectly fixed on the workbench through the inner ring. In addition, in other embodiments, the limit device can also use a mechanical travel switch or a matching Hall switch and a limit switch such as a magnet. For details, please refer to the corresponding description in Embodiment 1, which will not be repeated here.

[0048] In this embodiment, the second connecting member 65 is directly used as a touch rod. It can be understood that in other embodiments, a straight rod can be installed on the outer ring as a touch rod, and the positions of the two photoelectric switches can be changed accordingly according to the position of the straight rod.

[0049] In Example 1 and Example 2, the moving angle range of the arc-shaped rack and the rotation amplitude range of the outer ring are both 25°. Since six disturbers are evenly arranged, theoretically, the moving angle range of the arc-shaped rack and the rotation amplitude range of the outer ring can reach 30°. However, due to the errors in the manufacture and installation of the disturbers and the space occupied by the first end plate and the second end plate at both ends of the cylinder, the moving angle range of the arc-shaped rack and the rotation amplitude range of the outer ring are both set to 25° to ensure the smooth operation of the equipment.

Claims

1. A light-curing 3D printer with a disturbance function, characterized in that: The invention comprises a workbench, on which a material trough is fixedly installed, the material trough is used to contain liquid materials, at least one disturber is arranged in the material trough, each disturber comprises a cylinder fixed in the material trough and a piston slidably installed in the cylinder, and a piston rod is connected to the piston; a driver is installed on the workbench, the driver can drive the piston to slide in the cylinder through the piston rod, suck the liquid material in the material trough into the cylinder or spray the liquid material in the cylinder, and disturb the liquid material in the material trough; The material trough is circular, and a plurality of perturbators are arranged in the material trough, and the plurality of perturbators are evenly spaced around the central axis of the material trough. The cylinder of each perturbator is arc-shaped, and the center of the center line of the cylinder is located on the central axis of the material trough. The piston rods of the perturbators are connected end to end to form a ring, and the ring is coaxially arranged with the material trough. The driver comprises an external gear slewing bearing and a driving motor. The external gear slewing bearing comprises an outer ring and an inner ring which are connected together by balls. The inner ring is fixed on a workbench and has teeth protruding radially outward on the outer ring. The external gear slewing bearing is coaxially arranged with the material trough. The driving motor is fixed on the workbench. A gear is installed on the output shaft of the driving motor. The gear is meshed with the outer ring, and the outer ring is connected to the circular ring. Under the drive of the driving motor, the outer ring can drive the circular ring to swing back and forth around the central axis of the material trough, and synchronously drive the piston to move back and forth in the cylinder.

2. The light-curing 3D printer according to claim 1, characterized in that: An end plate is provided at each end of the cylinder, and the piston rod freely passes through the end plates at both ends of the cylinder. The piston divides the inner cavity of the cylinder into a first chamber and a second chamber. A first inlet and outlet connected to the first chamber and a second inlet and outlet connected to the second chamber are opened on the cylinder wall of the cylinder.

3. The light-curing 3D printer according to claim 2, characterized in that: The first inlet and outlet and the second inlet and outlet are both oriented toward the center of the trough in a horizontal direction.

4. The light-curing 3D printer according to claim 1, characterized in that: Each disruptor is located radially outside the trough.

5. The light-curing 3D printer according to claim 1, characterized in that: A feeler rod is fixedly mounted on the outer ring. A limit device is respectively arranged on both sides of the feeler rod along the circumferential direction of the external gear slewing bearing. The two limit devices are fixedly mounted on the workbench and are not connected to the outer ring. The two limit devices can limit the rotation range of the outer ring. The two limit devices and the drive motor are electrically connected to the central processing controller.

6. The light-curing 3D printer according to claim 1, characterized in that: It also includes a printing platform. The bottom surface of the material trough is divided into a working area and a non-working area. The working area is located in the central part of the bottom surface of the material trough, and the non-working area surrounds the working area. The printing platform can enter the material trough in a vertical direction and be located in the working area, and the disturber is located in the non-working area.

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