Dental cast 3D printing control system

Abstract

The invention provides a dental cast 3D printing control system. The dental cast 3D printing control system comprises an LCD screen, a UV light source for emitting ultraviolet light, a forming platform for attaching a cured model, a trough for containing liquid ceramic filling photosensitive resin, an ink box, a Z-axis motor, an X-axis motor, a lead screw and a sensor, wherein the Z-axis motor and the X-axis motor drive the forming platform and the ink box to move. A magnet structure is arranged outside the ink box and can be tightly adsorbed on the steel plate of the trough; a scraper assembly is integrated on the periphery of the magnet, so that the ink box can uniformly scrape the slurry in the moving process; the top of the ink box is provided with an ink box cover. The system not only optimizes the design of the material groove, but also is provided with the automatic feeding ink box so as to dynamically supplement slurry in the printing process, and meanwhile, a scraper assembly in the ink box is utilized to ensure uniform distribution of the slurry and optimize the curing quality. By means of the design, the printing defect caused by insufficient slurry supply or uneven slurry distribution of a traditional photocuring 3D printer is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing technology, and particularly to a 3D printing control system for dental models. Background Art

[0002] Traditional dental treatments rely on manual impression taking and laboratory fabrication, but this method has many problems, including discomfort during the impression taking process, long production cycles, limited precision, large material waste, and the need for patients to visit frequently. The fabrication process of restorations is complex and time-consuming, and due to the limited precision of manual carving, it is difficult to achieve personalized customization. Compared with traditional methods, 3D printing technology can effectively solve these problems, significantly improve the efficiency and precision of dental treatments, reduce discomfort during the treatment process, shorten the treatment time of patients, and at the same time reduce the pain and medical costs of patients. In addition, 3D printing also avoids material waste in traditional methods and can better preserve digital models for later repair and modification.

[0003] However, traditional stereolithography 3D printers are prone to printing defects due to insufficient or uneven slurry supply.

[0004] Moreover, although many existing 3D printing control systems can meet basic printing requirements, most systems still rely on traditional real-time operating systems (RTOS). These operating systems usually have high resource occupancy problems, resulting in the inability of the system's real-time scheduling and response speed to meet the requirements of high-precision printing. Summary of the Invention

[0005] The object of the present invention is achieved through the following technical solutions.

[0006] Specifically, the present invention provides a 3D printing control system for dental models, including:

[0007] An LCD screen, a UV light source for emitting ultraviolet light, a forming platform for attaching the cured model, a material tank for containing liquid ceramic-filled photosensitive resin, a Z-axis and X-axis motor for driving the forming platform and the ink cartridge to move, a lead screw, and a sensor.

[0008] Further, the bottom middle of the material tank is hollowed out for the LCD screen to project a mask pattern onto the ceramic-filled photosensitive resin at the bottom of the material tank, and a release film is pasted at the bottom of the material tank.

[0009] Further, the lead screw is combined with the motor to convert the rotational motion into a linear motion on the lead screw, and by adjusting the rotation direction of the motor, the movement direction of the object is controlled.

[0010] Further, the ink cartridge is driven by the X-axis motor to move left and right, while the forming table is driven by the Z-axis stepper motor to move up and down.

[0011] Furthermore, the forming platform includes: a disassembly and assembly handle, a hydraulic chamber, a pressing piston, and a universal ball head;

[0012] During the leveling operation, first add grease to the hydraulic chamber to ensure that the pressure in the hydraulic chamber remains balanced when tightening the screws of the hydraulic compression piston, thereby achieving precise leveling;

[0013] During the leveling process, if the forming platform has not yet contacted the bottom of the material tank, the universal ball head can rotate freely to facilitate the adjustment of the forming platform; when the forming platform is completely attached to the bottom of the material tank, the forming platform automatically adjusts to a state parallel to the material tank. At this time, tighten the screws of the hydraulic compression piston, and the pressing piston moves under pressure to press the universal ball head, and the universal ball head no longer moves.

[0014] Furthermore, a magnet structure is equipped outside the ink cartridge, which can be tightly adsorbed on the steel plate of the material tank; a scraper assembly is integrated around the magnet, so that the ink cartridge can evenly scrape the slurry during movement; an ink cartridge cover is equipped on the top of the ink cartridge.

[0015] Furthermore, the printing control system further includes a hardware control system, including:

[0016] A controller: used to send task instructions and receive feedback information to ensure the stable operation and coordinated control of the system;

[0017] A forming platform and a scraper stepper motor control module: includes a stepper motor and a stepper motor driver; when the controller sends a motion instruction, the stepper motor driver analyzes the signal and drives the stepper motor to run, thereby driving the forming platform and the ink cartridge to complete corresponding displacement operations;

[0018] A limit switch module: The sensor is a limit switch, and when the infrared ray in the U-shaped groove of the limit switch is blocked, a signal is sent to the controller;

[0019] A UV lamp control module: sends instructions to control the on / off of the relay, thereby realizing the control of the turning on or off of the UV lamp;

[0020] An LCD screen control module: projects the sliced image through an HDMI cable connected to the LCD screen.

[0021] Furthermore, in the dental model 3D printing control system, there are a GPIO component, a PWM component, and an external device component.

[0022] Furthermore, the PWM component provides a call interface for external device components to achieve modifying the motor frequency and driving the motor to move.

[0023] Furthermore, the external device components include a Z-axis motor component, an X-axis motor component, a UV lamp component, and a limit switch component, which are respectively used to control the movement of the Z-axis motor and the X-axis motor, control the on / off state of the UV lamp, and obtain the states of four limit switches.

[0024] The advantages of the present invention are as follows:

[0025] (1) Compared with the traditional leveling method, the operation of this system is simpler, the leveling is more accurate, and the user-friendliness is higher. Even non-professional users can quickly complete the leveling, greatly improving the usability of the system and the printing success rate.

[0026] (2) This system not only optimizes the design of the material tank, but also is equipped with an automatic feeding ink cartridge to dynamically supplement the slurry during the printing process. At the same time, the scraper assembly in the ink cartridge is used to ensure the uniform distribution of the slurry, optimizing the curing quality. This design effectively avoids the printing defects caused by insufficient slurry supply or uneven distribution in traditional stereolithography 3D printers.

[0027] (3) Adopting the hardware component design principle, it is divided into multiple independent functional modules. Each module has clear responsibilities and communicates and collaborates through standardized interfaces to improve the scalability, maintainability, and reliability of the system. Description of the Drawings

[0028] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0029] Figure 1 Shows the mechanical structure framework diagram of a dental mold 3D printer according to an embodiment of the present invention.

[0030] Figure 2 Shows the schematic diagram of the forming platform structure according to an embodiment of the present invention.

[0031] Figure 3 Shows the schematic diagram of the material tank structure according to an embodiment of the present invention.

[0032] Figure 4 Shows the schematic diagram of the ink cartridge structure according to an embodiment of the present invention.

[0033] Figure 5 Shows the schematic diagram of the hardware control system according to an embodiment of the present invention. Detailed Embodiments

[0034] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0035] In order to miniaturize the dental mold 3D printer, the present invention provides a control system design solution for the dental mold 3D printer, including the mechanical structure design of the system, designing the control system and the hardware control platform, designing the underlying driver of the main controller and external device components based on the componentization principle, realizing the control of the machine, and ensuring that the system hardware meets the accuracy requirements of dental mold 3D printing.

[0036] The present invention first introduces the overall framework of the device's mechanical structure, and then details the key mechanical components designed to adapt to the characteristics of ceramic-filled photosensitive resin materials.

[0037] The present invention adopts a bottom-up forming method for mechanical structure design, which can save printing slurry, has a relatively small overall volume, is easy to move. The LCD screen is placed below the material tank, and the UV lamp is installed below the LCD screen. The sliced mask image of the three-dimensional model is displayed on the LCD screen, and its structure is as Figure 1 shown.

[0038] The mechanical structure mainly includes: an LCD screen, a UV light source for emitting ultraviolet light, a fan for dissipating heat from the UV lamp, a forming platform for attaching the cured model, a material tank for containing liquid ceramic-filled photosensitive resin, Z-axis and X-axis motors and mechanical transmission components for driving the forming platform and the ink cartridge to move, and related sensors, etc.

[0039] The middle of the bottom of the material tank is hollowed out, allowing the LCD screen to project a mask pattern onto the ceramic-filled photosensitive resin at the bottom of the material tank. In order to ensure that the cured layer adheres to the forming table, a release film is pasted at the bottom of the material tank, and its material is Fluorinated Ethylene Propylene (FEP), which can reduce the adhesion force between the cured layer and the liquid tank.

[0040] The high-precision ball screw is combined with a stepper motor to convert the rotational motion into a linear motion on the screw. By adjusting the rotation direction of the motor, the movement direction of the object can be controlled. The ink cartridge is driven by the X-axis motor to move left and right, while the forming table is driven by the Z-axis stepper motor to move up and down.

[0041] In a 3D printing system, the precise positioning of the moving platform is an important factor affecting the forming accuracy. Therefore, when selecting the motor, its step angle, transmission mechanism parameters, and driving method need to be fully considered.

[0042] This system adopts a stepping motor plus lead screw drive scheme to achieve high-precision linear motion control. Among them, the Z-axis forming platform uses a 42-step motor with a lead of 4 mm and a step angle of 1.8°; the X-axis ink cartridge uses a 28-step motor with a lead of 2 mm and a step angle of 1.8°. Both are equipped with DM542 drivers, and the motor drive subdivisions of the Z-axis and X-axis are set to 8 and 16 subdivisions respectively, making the motor operation smoother and the displacement corresponding to each control pulse smaller.

[0043] In some embodiments of the present invention, the stepping motor achieves precise control through pulse-displacement linear mapping. Combining the 1.8° step angle with the 8 and 16 subdivision technologies of the DM542 driver, the actual step angles of the ink cartridge and the forming platform stepping motors can be obtained from Formula 1 as 0.2250° and 0.1125°, where θ 基础 is the inherent step angle of the motor, 1.8°, and n 细分 is the driver subdivision multiple, which are 8 and 16 respectively.

[0044]

[0045] Considering the lead screw drive mechanism, the rotational motion of the motor will be converted into linear motion. From Formula 2, it can be obtained that the linear displacement resolution of the Z-axis forming platform corresponding to a lead of 4 mm is 0.00125 mm / pulse, and the linear displacement resolution of the X-axis ink cartridge with a lead of 2 mm is 0.00125 mm / pulse. Where P b is the lead screw lead, in mm; ΔL is the linear displacement resolution, which represents the theoretical displacement of the load in the linear direction when the stepping motor receives each pulse signal, in mm / pulse.

[0046]

[0047] It can be seen that after the Z-axis forming platform stepping motor is combined with 16-subdivision control, the system can achieve sub-micron-level linear displacement accuracy, which is of great significance for high-precision features (such as root grooves <0.2 mm) in dental mold 3D printing.

[0048] In summary, this system selects 28-step motors and 42-step motors, combined with the 8 and 16 subdivision controls of the DM542 driver, which can meet the requirements of dental mold 3D printing for high precision and stability. At the same time, the lead screw drive mechanism further ensures the positioning accuracy of the system, making the linear displacement controlled by each pulse reach 0.00125 mm. The stepping motor scheme has the advantages of simple control, moderate cost, and system stability while ensuring accuracy, making it the best choice for this 3D printing system.

[0049] Some embodiments of the present invention may also include limit switches, which are mounted via fixed brackets at the starting and ending points of the 3D printer's build platform's range of motion. Light shields are also fixed to the build platform. When the build platform reaches its maximum range of motion, the light shield blocks the infrared beam, and the system detects a low-level signal, triggering limit protection to prevent the motion mechanism from exceeding a safe range.

[0050] The cross-sectional area of a tooth is usually 30-200 mm 2 Since the price of ceramic-filled photosensitive resin materials is relatively high, the area of the molding platform and trough must be greater than 200mm 2 To meet printing needs, but at the same time not too large to reduce slurry waste, the molding platform area of this dental model 3D printing system has been optimized to take into account both material utilization and printing stability. The diameter of the molding platform of this system is 30mm.

[0051] In order to ensure smooth demolding after the first few layers of the printing process are cured, and that the cured thickness of each layer is uniform, the leveling of the molding platform is crucial. However, the leveling method of traditional 3D printers usually relies on manual adjustment of multiple screws, which is complicated to operate and susceptible to human error, and the leveling accuracy is difficult to guarantee. To address this problem, this system adopts Hydraulic Balance Self-Calibration Technology to achieve simple operation and high-precision leveling, greatly improving the user experience. Hydraulic Balance Self-Calibration Technology is an automatic adjustment technology that accurately controls the pressure and flow of the hydraulic system. It is widely used in high-precision machine tools, hydraulic drive machinery, aerospace systems and automation equipment.

[0052] like Figure 2 As shown, this system is designed with a disassembly handle, which allows users to easily install or disassemble the build platform, greatly reducing the difficulty of operation. During the leveling operation, first add grease to the hydraulic chamber to ensure that the pressure in the hydraulic chamber remains balanced when tightening the hydraulic tightening piston screw, thereby achieving precise leveling. During the leveling process, if the build platform has not yet contacted the bottom of the trough, the universal ball head can rotate freely, which is convenient for adjusting the build platform; when the build platform is completely in contact with the bottom of the trough, the platform automatically adjusts to a state parallel to the trough. At this time, tighten the hydraulic tightening piston screw. At this time, the clamping piston is subjected to very high pressure, and the clamping piston will move slightly to compress the universal ball head. At the same time, the friction between the universal ball head and the external object is also very large, causing the universal ball head to no longer move. In this way, the build platform is leveled, ensuring printing accuracy and stability.

[0053] Compared with traditional leveling methods, this system is easier to operate, more accurate in leveling, and more user-friendly. Even non-professional users can quickly complete leveling, greatly improving the usability of the system and the printing success rate.

[0054] Ceramic-filled photosensitive resin is relatively expensive. Therefore, in the design of the dental model 3D printing system, it is necessary to minimize slurry waste and improve slurry utilization rate. This system not only optimizes the design of the material tank but also is equipped with an automatic feeding ink cartridge to dynamically supplement the slurry during the printing process. At the same time, the scraper assembly in the ink cartridge is used to ensure uniform distribution of the slurry and optimize the curing quality. This design effectively avoids printing defects caused by insufficient slurry supply or uneven distribution in traditional stereolithography 3D printers.

[0055] This system uses an 8.9-inch LCD screen as the light source display device for stereolithography. To reduce system costs and improve versatility, a material tank design different from traditional 3D printers is adopted, as Figure 3 shown. The material tank is mainly made of 301 stainless steel. Its function is not only to hold the slurry, but most of the steel plate structure is used to block the unused area of the LCD screen, and only a material tank with a diameter of 40 mm and a depth of 3 mm is opened in the central part to meet the slurry supply required for each layer of curing.

[0056] At the bottom of the material tank, the system uses an FEP (fluorinated ethylene propylene) release film as a key component to optimize the printing effect. FEP has high transparency, can effectively transmit ultraviolet light (UV), and ensure efficient curing of the photosensitive resin. At the same time, it has a low surface energy, can significantly reduce the resin adhesion force, and reduce the delamination problem caused by adhesion during the forming process. In addition, FEP also has characteristics such as high temperature resistance and chemical corrosion resistance, enabling it to maintain excellent stability during long-term use.

[0057] However, due to the limited slurry capacity inside the material tank, it cannot meet the printing requirements of a complete dental crown restoration at one time. Therefore, this system further designs an automatic feeding system, namely an ink cartridge device, to achieve dynamic slurry supplementation and ensure printing continuity and forming quality, as Figure 4As shown in (a). A magnet structure is equipped outside the ink cartridge, which can be tightly adsorbed on the steel plate of the material tank. 301 stainless steel will undergo a phase transformation from austenite to martensite after cold working, thus generating magnetism, so it can be attracted by the magnet to prevent slurry leakage. Since the viscosity of the ceramic-filled photosensitive resin is relatively high and the fluidity is poor, the uniform distribution of the slurry before curing is crucial, otherwise it may lead to curing failure in local areas. Therefore, during the printing process, the slurry in the material tank must be evenly scraped to ensure that the thickness of each layer of curing is consistent, improving the printing accuracy and success rate. A scraper assembly is integrated around the magnet, enabling the ink cartridge to evenly scrape the slurry during movement, improving the uniformity of slurry distribution and further optimizing the curing effect. The top of the ink cartridge is also equipped with an ink cartridge cover to prevent ultraviolet rays in the environment from irradiating the slurry during printing and affecting its stability, as Figure 4 shown in (b). The entire ink cartridge assembly is installed on the X-axis lead screw and driven by a motor to achieve reciprocating motion, making the feeding process more intelligent and automated.

[0058] In summary, through the optimization of the material tank design and the introduction of an automatic feeding system, this system has achieved higher material utilization efficiency, more stable printing accuracy, and a more convenient user experience. These innovations not only enhance the reliability of the stereolithography 3D printing process but also effectively reduce costs, making the system more competitive.

[0059] The system of the present invention further includes a hardware control platform, including a CH32V303RCT6 controller. CH32V303 cooperates with ESP8684 to achieve the WiFi communication function. The chip pin multiplexing is designed to control and monitor mechanical components, and an isolation circuit is designed to reduce the impact of electromagnetic interference on signal transmission.

[0060] The hardware control system is the core of the system hardware structure, as Figure 5 shown. Adopting the hardware component design principle, it is divided into multiple independent functional modules. Each module has clear responsibilities and communicates and cooperates through standardized interfaces to improve the scalability, maintainability, and reliability of the system. The hardware control of this system mainly has six parts:

[0061] (1) Controller: Used to send task instructions and receive feedback information to ensure the stable operation and coordinated control of the system. The main control chip is the core of the entire hardware control system, determining the computing power, interface resources, and energy consumption level of the system. Therefore, selecting a suitable main control chip for the entire system is an important task. This system selects CH32V303 as the main control chip. This chip is based on the RISC-V architecture and has advantages such as high performance, low power consumption, and rich peripheral interfaces, and is suitable for embedded real-time control applications.

[0062] The hardware control system uses peripheral resources such as the timer (TIM), general-purpose input / output (GPIO), and universal synchronous / asynchronous receiver / transmitter (UART) provided by the CH32V303 chip to implement control functions for various mechanical components, such as motor control, obtaining the status of limit switches, and communicating with the PC.

[0063] (2) Forming platform and scraper stepper motor control module: It includes components such as a stepper motor, a stepper motor driver, a lead screw, a guide rail, a forming platform, and an ink cartridge. When the controller sends a motion instruction, the stepper motor driver parses the signal and drives the stepper motor to run, thereby driving the forming platform and the ink cartridge to complete corresponding displacement operations.

[0064] In the motor control system, in order to prevent the backfeed current generated during the startup, braking, and stopping of the motor from affecting the stability of the main control chip, and at the same time reduce the impact of electromagnetic interference on the signal, it is necessary to design a motor control isolation circuit.

[0065] This system uses PWM pulse signals to control the movement distance of the motor, adjusts the movement speed of the motor through the PWM frequency, and uses GPIO signals to control the rotation direction of the motor. Therefore, the isolation circuit needs to cover these types of control signals to ensure the stability of signal transmission and the reliability of the system.

[0066] (3) Limit switch module: When the infrared ray in the U-shaped groove of the limit switch is blocked, a signal will be sent to the controller.

[0067] (4) UV lamp control module: The controller sends instructions to control the on / off of the relay, thereby realizing the control of turning on or off the UV lamp.

[0068] (5) LCD screen control module: The PC connects to the LCD screen through an HDMI cable to project sliced images.

[0069] (6) Communication module: The communication between the MCU main control chip and the PC and the WiFi module is carried out through the UART serial port. The WiFi chip uses ESP8684. In this system, ESP8684 communicates with the CH32V303 main control chip through UART (serial port) and is responsible for providing WiFi communication functions. Combining with the hardware platform of the CH32V303 controller, ESP8684 supports the remote firmware update function. This design enables the system to update the program through the wireless network without manual intervention, improves the maintenance efficiency of the system, and ensures that the device always maintains the latest software version during long-term use. Through this solution, users can remotely update the control program of the printing system, reducing the maintenance cost and improving the stability and reliability of the device.

[0070] The hardware control system is powered by two voltages, namely DC5V and DC24V. Among them, the stepping motors and their drivers in the forming platform and the scraper motor control module are powered by DC24V, and the UV lamp is also powered by DC24V, while the remaining modules are powered by DC5V.

[0071] The underlying driver component provides a unified interface for the upper-layer application program, shielding the hardware details, so that developers do not need to directly operate the registers, improving the portability and maintainability of the software. The external device component realizes the control of mechanical motion by calling the interface of the underlying driver component. The design of the underlying driver component and the external device component in the present invention will be introduced below.

[0072] In the dental mold 3D printing control system, GPIO provides signal acquisition and control interfaces for the device driver component, enabling the external device component to obtain the limit switch status, control the UV lamp relay, and collect and control the stepping motor direction signal. For example, the limit switch, as a key sensor, needs to be configured by GPIO as an input mode to detect whether the motor movement exceeds the safe range; the control signal of the UV lamp relay needs to be driven by GPIO in the output mode. The reasonable configuration of GPIO is crucial for ensuring the stable operation of the system.

[0073] Among them, the GPIO pins of the CH32V303 main control chip adopted in this system have 5 ports, marked as A, B, C, D, and E, with a total of 80 pins, and each port has 16 pins. port_pin represents the pin, in the form of (port number)|(pin number), such as: (PTC_NUM|6) represents pin 6 of port C.

[0074] In the dental mold 3D printing system, the PWM component mainly provides a call interface for the external device component to realize modifying the motor frequency and driving the motor movement. The PWM component header file contains three interface functions. The external device component needs to use the pwm_set_freq() function and the pwm_set_duty() function in the PWM component when changing the motor speed and controlling the motor movement respectively.

[0075] In this controller system, the external device components include the Z-axis motor component MOTOR_Z, the X-axis motor component MOTOR_X, the UV lamp component UV, and the limit switch component SENEOR, which are respectively used to control the movement of the Z-axis motor and the X-axis motor, control the on / off state of the UV lamp, and obtain the states of 4 limit switches.

[0076] The Z-axis motor component MOTOR_Z will be introduced in detail below. This component controls the movement of the Z-axis motor by calling the interface of the underlying driver component.

[0077] There are 3 functions in the MOTOR_Z component header file (motor_z.h), and the function descriptions are shown in Table 1 below.

[0078] Table 1 MOTOR_Z Component Function Description

[0079]

[0080]

[0081] This device driver component precisely controls the movement trajectory of the motor by calling the underlying GPIO and PWM components, providing an interface for thread control of the Z-axis motor movement.

[0082] As described above, it is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A 3D printing control system for dental models, characterized in that, Including: An LCD screen, a UV light source for emitting ultraviolet light, a forming platform for attaching a cured model, a material tank for containing liquid ceramic-filled photosensitive resin, an ink cartridge, a Z-axis and an X-axis motor for driving the movement of the forming platform and the ink cartridge, a lead screw, and a sensor.

2. The dental mold 3D printing control system according to claim 1, wherein The middle of the bottom of the material tank is hollowed out to allow the LCD screen to project a mask pattern onto the ceramic-filled photosensitive resin at the bottom of the material tank, and a release film is pasted at the bottom of the material tank.

3. The dental mold 3D printing control system according to claim 1, wherein The lead screw is combined with the motor to convert the rotational motion into a linear motion on the lead screw, and by adjusting the rotation direction of the motor, the movement direction of the object is controlled.

4. The dental mold 3D printing control system according to claim 1, wherein The ink cartridge is driven by the X-axis motor to move left and right, while the forming table is driven by the Z-axis motor to move up and down.

5. The dental mold 3D printing control system according to claim 1, wherein The forming platform includes: a disassembly and installation handle, a hydraulic chamber, a pressing piston, and a universal ball head; During the leveling operation, first add grease to the hydraulic chamber to ensure that when the screw of the hydraulic compression piston is tightened, the pressure in the hydraulic chamber remains balanced, thereby achieving precise leveling; During the leveling process, if the forming platform has not yet contacted the bottom of the material tank, the universal ball head can rotate freely to facilitate the adjustment of the forming platform; when the forming platform is completely attached to the bottom of the material tank, the forming platform automatically adjusts to a state parallel to the material tank. At this time, tighten the screw of the hydraulic compression piston, and the pressing piston moves under pressure to press the universal ball head, and the universal ball head no longer moves.

6. The dental mold 3D printing control system according to claim 1, wherein The outside of the ink cartridge is equipped with a magnet structure, which can be tightly adsorbed on the steel plate of the material tank; a scraper assembly is integrated around the magnet, so that the ink cartridge can evenly scrape the slurry during movement; The ink cartridge is equipped with an ink cartridge cover at the top.

7. The dental mold 3D printing control system according to claim 1, wherein The printing control system further includes a hardware control system, including: A controller: used to send task instructions and receive feedback information to ensure the stable operation and coordinated control of the system; A forming platform and a scraper stepper motor control module: including a stepper motor and a stepper motor driver; when the controller sends a movement instruction, the stepper motor driver analyzes the signal and drives the stepper motor to operate, thereby driving the forming platform and the ink cartridge to complete the corresponding displacement operation; A limit switch module: the sensor is a limit switch, and when the infrared ray in the U-shaped groove of the limit switch is blocked, the limit switch module sends a signal to the controller; A UV lamp control module: sends instructions to control the on and off of the relay, thereby realizing the control of the opening or closing of the UV lamp; An LCD screen control module: connects the LCD screen through an HDMI cable to project the sliced image.

8. The dental mold 3D printing control system according to claim 1, wherein In the dental model 3D printing control system, it includes a GPIO component, a PWM component, and an external device component.

9. A dental model 3D printing control system according to claim 8, characterized in that The PWM component provides a call interface for the external device component to achieve modifying the motor frequency and driving the motor to move.

10. A dental model 3D printing control system according to claim 8, characterized in that The external device component includes a Z-axis motor component, an X-axis motor component, a UV lamp component, and a limit switch component, which are respectively used to control the movement of the Z-axis motor and the X-axis motor, control the on / off state of the UV lamp, and obtain the state of the limit switch.

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