CN108790160B - 3D prints-electrostatic spinning packagine machine and control system thereof - Google Patents
3D prints-electrostatic spinning packagine machine and control system thereof Download PDFInfo
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- CN108790160B CN108790160B CN201810602553.2A CN201810602553A CN108790160B CN 108790160 B CN108790160 B CN 108790160B CN 201810602553 A CN201810602553 A CN 201810602553A CN 108790160 B CN108790160 B CN 108790160B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
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Abstract
The invention discloses a 3D printing-electrostatic spinning packaging machine which comprises a 3D printer, an electrostatic spinning machine and a rack, wherein the 3D printer is positioned on the rack, and the electrostatic spinning machine is positioned on the side edge of the rack; the invention also discloses a control system of the 3D printing-electrostatic spinning packaging machine, which comprises a main control system module, a temperature detection and control module, a motor driving module, a USB interface module and an SD card module. The invention combines the 3D printer and the electrostatic spinning machine, makes up for the deficiencies, is used in the field of product packaging, makes up for the defects of the 3D printing size by using the electrostatic spinning machine, and also expands the electrostatic spinning from a simple two-dimensional structure of a film, a line and a belt to a three-dimensional structure; the invention carries out detailed control system design on the 3D printer and the electrostatic spinning machine, organically combines the two systems together, can work independently and collaborate, has no unnecessary working steps, and has simple structure.
Description
Technical Field
The invention relates to a packaging machine, in particular to a 3D printing-electrostatic spinning packaging machine and a control system thereof.
Background
The conventional packaging container in the market is formed by first manufacturing a mold and then forming a product, which consumes a lot of time and labor and is inconvenient to modify. The 3D printing technology is used for package object simulation by using three-dimensional software, so that the design scheme is convenient to modify, the precision of the technology is improved, and raw materials and cost are saved. And only need the artificial design drawing of earlier stage, in whole 3D printing process, need not artifical participation basically, practiced thrift manpower resources greatly. Like all techniques, it has its own drawbacks and disadvantages. Electrospinning, as a simple and direct method for preparing ultrafine polymer fibers, is active in the fields of research and application. The products produced by electrospinning technology are microscopically ultrafine fibers of nanometer or micrometer size, and macroscopically are usually in the form of films, and thus can be directly used as packages.
Researchers are beginning to cast eye light into deeper applications and technologies. The idea is to combine the 3D printing technology with other technologies to make up for the deficiencies, so the electrospinning technology starts to slowly come into the imagination of people. The electrostatic spinning machine is used for making up the defect of the 3D printing size, the electrostatic spinning is expanded from a two-dimensional structure of a simple film, a simple line and a simple belt to a three-dimensional structure, and various technologies of combining the 3D printing and the electrostatic spinning are applied. For example in the medical sector: researchers have found that artificial blood vessels composed of natural polymer nanofibers are transplanted into the human body to promote the recovery of damaged blood vessels. However, the biocompatible materials of electrospun nanofibers, such as chitosan, lack good mechanical properties. And the artificial blood vessel obtained by combining 3D printing and electrostatic spinning shows excellent mechanical properties, and the method can be used for blood vessel reconstruction.
The two technologies are combined more and more, and have wide development and innovation prospects, but the two technologies are few in the field of product packaging, and the existing technology is very complex in structure; in the packaging field, the control system of both techniques is very important, not only to determine the quality of the finished packages produced, whether the steps in operation are simple, quick and effective, whether the mechanical parts can be operated according to human thoughts, but also to care about the safety of the machine in operation. Therefore, a complete, simple and feasible 3D printer-electrostatic spinning control system is designed, and it is very important that the control system is tested to ensure that the system can normally run.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a 3D printing-electrospinning packing machine with simple structure and convenient operation, and a complete, simple and feasible 3D printer-electrospinning control system.
In order to achieve the above purpose, the invention adopts the technical scheme that: the utility model provides a 3D prints-electrostatic spinning packagine machine, includes 3D printer, electrostatic spinning machine and frame, the 3D printer is located the frame, and the electrostatic spinning machine is located the frame side.
The 3D printer comprises an extrusion motor, a Z-axis motor and an X-axis motor; the extrusion motor is used for extruding materials and performing 3D printing, the Z-axis motor is used for controlling the vertical displacement of the extrusion motor, and the X-axis motor is used for controlling the left and right displacement of the extrusion motor. Z axle motor and X axle motor are located the montant of frame both sides respectively and with montant swing joint, the extrusion motor lower extreme is provided with the shower nozzle, Z axle screw rod is connected to the output of Z axle motor, X axle screw rod is connected to the output of X axle motor, X axle screw rod passes the screw hole of extrusion motor and the screw hole cooperation of extrusion motor.
The electrostatic spinning machine comprises a liquid supply system, a fiber collecting system and a voltage loading system, wherein the liquid supply system is positioned on one side of the rack, and the fiber collecting system is positioned on the other side of the rack.
The frame is square frame, and the frame bottom surface is provided with the workstation, the frame bottom surface is equipped with Y axle motor and workstation rotating electrical machines, Y axle motor and workstation rotating electrical machines all connect the workstation.
Further, the output end of the Z-axis motor is connected with a Z-axis screw rod in the box body in which the X-axis motor is arranged through a belt; the Z-axis motor drives the Z-axis screws on the two vertical rods simultaneously, so that the middle extrusion motor stably moves vertically.
Further, the liquid supply system comprises an injection pump, a needle head and a needle head fixing device, wherein the output end of the injection pump is connected with the needle head, and the needle head is arranged in the needle head fixing device; the fiber collecting system comprises a fixed receiving plate and a sliding clamping groove, and the fixed receiving plate is opposite to the needle head; the voltage loading system is composed of a high-voltage power supply, the positive pole of the high-voltage power supply is connected with the needle fixing device, the negative pole of the high-voltage power supply is connected with the fixed receiving plate, and a high-voltage electric field is formed after the high-voltage power supply is electrified. The specific working process and principle of the electrostatic spinning machine are as follows:
(1) preparing a solution to be used, filling the solution into a syringe pump, and connecting the syringe pump with the needle fixing device.
(2) The positive power supply clamp is connected with the needle fixing device, and the negative power supply clamp is connected with the fixed receiving plate.
(3) The injection pump gives driving force through the injection pump, the solution is sent out by the needle head, and the jet speed is adjusted through the injection pump.
(4) And (3) turning on a high-voltage power supply, slowly adjusting the power supply value, forming filaments on the receiving plate surface under the action of the electric field force after the solution passes through the high-voltage electric field, and finally forming a film.
By analyzing the working process of the electrostatic spinning machine, the specific composition of two main control systems of electrostatic spinning can be determined as follows: an injection pump and a high-voltage power supply. The injection pump mainly controls the flow speed and flow rate of solution extrusion, and the control accuracy of the injection pump is high; the high-voltage power supply has higher requirements, strong controllability and higher safety. Compared with a control system of a 3D printer, the control system of the electrostatic spinning machine is less in content and simple, does not need complex design and only needs to select a proper working instrument.
Further, the syringe pump is a baoding Lange LSP02-1B syringe pump. The injection pump directly relates to the flow rate and the flow rate of the extrusion solution during electrostatic spinning, which is an important factor influencing the electrostatic spinning result, and in order to ensure that the flow rate and the flow rate of the solution can be accurately controlled, the Baoding Lange LSP02-1B injection pump is selected. LSP02-1B is a perfusion-pumping dual channel syringe pump that has many different modes of operation in order to accommodate different application requirements in a variety of scenarios. It is a desirable high precision, low flow, low pulsation liquid delivery device because it possesses very high control accuracy and a wide range of linear speeds, and is therefore often used in chemical reaction injection experiments, electrospinning, and other laboratory microinjection experiments, among others. The main data are as follows: maximum stroke: 140 mm; stroke resolution: 0.156 μm; linear velocity range: 5 μm/min-130mm/min (flow rate: linear velocity × injector internal cross-sectional area); linear velocity modulation resolution: 5 μm/min; the stroke control precision is as follows: the error is less than or equal to plus or minus 0.5 percent (when the stroke is more than or equal to 30 percent of the maximum stroke); rated linear thrust: > 180N.
The high-voltage power supply is a DW-P303-1ACFO high-voltage power supply. There are many factors that affect electrospinning, among which is the applied current voltage. The polymer solution is polarized under the action of an external electric field to generate surface charges, and symmetric and asymmetric unstable whips are generated under various forces, stretched and refined in the whips, and volatilized and solidified in the whole process to form the nano fibers. In order to ensure stable voltage and freely-adjustable current and voltage, a DW-P303-1ACFO high-voltage power supply is selected, is also commonly used as an electrostatic spinning power supply and is a special high-voltage power supply for supplying power to equipment, and is internally designed with a modular circuit, so that the operation is flexible and convenient, the use is safe, the power supply is simple to maintain, can stably work for a long time, and has the characteristics of high reliability, strong anti-interference performance, high digital monitoring and display precision of output voltage and current, high conversion efficiency, continuously-adjustable output voltage and the like. Meanwhile, the device also has the functions of overvoltage protection, short-circuit protection, soft start of the device and the like. The DW-P303-1ACFO high-voltage power supply generally has an output range of 20KV to 100KV and an output power of 10W to 500W.
The utility model provides a 3D prints-electrostatic spinning packagine machine's control system which characterized in that: the intelligent temperature control system comprises a main control system module, a temperature detection and control module, a motor driving module, a USB interface module and an SD card module.
The temperature detection and control module is used for detecting and controlling the temperature of the spray head and the workbench to be within a normal working temperature range and communicating with the main control system module; the motor driving module is used for controlling the operation of the motor and comprises an X-axis motor, a Y-axis motor, a Z-axis motor and a workbench rotating motor, the control spray head moves and prints according to the sliced codes, and the motor driving module is communicated with the main control system module; the USB interface module is used for signal transmission between the main control system module and the upper computer and transmitting data to the main control system module; the SD card module is used for storing 3D printing data and communicating with the main control system module, and can print by reading files in the SD card without using an upper computer.
Further, the main control system module adopts an 8-bit AVR microcontroller. The main control system software can perform the functions of communication, digital signal control, data reading and processing and the like, and the control system adopts an 8-bit AVR microcontroller based on the requirements.
Further, the temperature detection and control module comprises a temperature measurement module and a heating module. The printing material of shower nozzle inside is a heat transfer process who changes into liquid from solid-state, and the temperature control of shower nozzle intracavity not only influences the printing precision, also influences the continuation of printing the process, more directly influences the quality that 3D printed the product, and the temperature of control heating bed can reduce effectively and print the phenomenon such as material broken silk, so temperature control is very important to 3D printing.
Further, the motor driving module chip is L298N, the chip is packaged by 15 pins, and two H-bridge high-voltage large-current full-bridge drivers are arranged in the chip. The motor works in an eight-beat working mode of a two-phase four-wire stepping motor. The motor drive directly controls the movement of the X axis, the Y axis and the Z axis of the 3D printer, so that the accurate steps are needed in the 3D printing process, and the requirement on the accuracy of the motor is high. The motor driving chip adopts L298N, the chip is packaged by adopting 15 pins, and a high-voltage large-current full-bridge driver with two H-bridges is arranged in the chip.
Further, the USB interface module is arranged in the 8-bit AVR microcontroller. The 8-bit AVR microcontroller is provided with a self-contained USB communication interface and can directly communicate with an upper computer through the USB interface without an additional USB interface. The highest data transmission speed of the 8-bit AVR microcontroller can reach 12Mb/s, and the 8-bit AVR microcontroller has the characteristics of timely and accurate information, strong anti-interference capability and small area of a circuit board.
Furthermore, the SD card module is connected with the main control system module in an SPI mode. The SD card has the characteristics of small weight, light volume, large storage space, fast data transmission and flexible movement, so that the SD card is very suitable for transmitting and storing the Gcode file finished by 3D model slicing. And the interface is also very simple, a standard SD mode or an SPI mode can be generally selected, and the SPI mode interface can transmit data by only four wires.
The invention has the beneficial effects that:
the invention combines the 3D printer and the electrostatic spinning machine, makes up for the deficiencies, is used in the field of product packaging, makes up for the defects of the 3D printing size by using the electrostatic spinning machine, and also expands the electrostatic spinning from a simple two-dimensional structure of a film, a line and a belt to a three-dimensional structure;
the three-dimensional packaging system simply and effectively combines the 3D printer and the electrostatic spinning machine together, a smooth and simple packaging work flow is established, the structure is simple, the two systems can work independently and do not interfere with each other, and the two systems can work together if needed;
the invention carries out detailed control system design on the 3D printer and the electrostatic spinning machine, organically combines the two systems together, can work independently and collaborate, has no unnecessary working steps, and has simple structure.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is another schematic view of the present invention;
FIG. 3 is a schematic view of the present invention with the square frame removed;
FIG. 4 is a diagram of a control system for the 3D printer of the present invention;
FIG. 5 is a circuit diagram of a temperature monitoring module according to the present invention;
FIG. 6 is a circuit diagram of the L298N chip of the present invention;
FIG. 7 is a circuit diagram of a USB interface module according to the present invention;
FIG. 8 is a circuit diagram of an SD card module according to the present invention;
in the figure: 1. a 3D printer; 11. an extrusion motor; 111. a spray head; 12. a Z-axis motor; 121. a Z-axis screw; 122. a belt; 13. an X-axis motor; 131. an X-axis screw; 2. an electrostatic spinning machine; 21. a needle head; 22. a needle head fixing device; 23. fixing a receiving plate; 3. a frame; 31. a vertical rod; 32. a work bench.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 3, the 3D printing-electrospinning packaging machine comprises a 3D printer 1, an electrospinning machine 2 and a frame 3, wherein the 3D printer 1 is located on the frame 3, and the electrospinning machine 2 is located on the side edge of the frame 3.
The electrostatic spinning machine 2 comprises a liquid supply system, a fiber collecting system and a voltage loading system, wherein the liquid supply system is positioned on one side of the rack 3, and the fiber collecting system is positioned on the other side of the rack 3.
As an optimized scheme of the embodiment, the output end of the Z-axis motor 12 is connected to a Z-axis screw 121 in the box where the X-axis motor 13 is located through a belt 122.
As an optimized scheme of the embodiment, the liquid supply system comprises a syringe pump, a needle 21 and a needle fixing device 22, wherein an output end of the syringe pump is connected with the needle 21, and the needle 21 is arranged in the needle fixing device 22; the fiber collecting system comprises a fixed receiving plate 23 and a sliding clamping groove, and the fixed receiving plate 23 is opposite to the needle 21; the voltage loading system is composed of a high-voltage power supply, wherein the positive pole of the high-voltage power supply is connected with the needle fixing device 22, and the negative pole of the high-voltage power supply is connected with the fixed receiving plate 23.
As an optimization scheme of the embodiment, the injection pump is a Baoding Lange LSP02-1B injection pump, and the high-voltage power supply is a DW-P303-1ACFO high-voltage power supply.
A control system of a 3D printing-electrostatic spinning packaging machine is shown in figure 4 and comprises a main control system module, a temperature detection and control module, a motor driving module, a USB interface module and an SD card module.
The temperature detection and control module is used for detecting and controlling the temperature of the spray head 111 and the workbench 32 and is communicated with the main control system module; the motor driving module is used for controlling the operation of a motor and is communicated with the main control system module; the USB interface module is used for signal transmission between the main control system module and the upper computer; the SD card module is used for storing 3D printing data and is communicated with the main control system module.
When the USB interface module works, the main control system module can interact with an upper computer through the USB interface module, and data are transmitted into the main control system module. The main control system module controls the temperature detection and control module and the motor drive module to work according to specific set data, the motor drive controls the three-axis motion system to movably print the extrusion head according to sliced codes, and the temperature detection and control module determines that the temperature of the workbench and the extrusion head is kept at a temperature capable of working normally. And the SD card module is arranged, so that the printing can be carried out by reading files in the SD card without using an upper computer. The power required by all modules is provided by a temperature-setting power supply.
As an optimization scheme of this embodiment, the master control system module employs an 8-bit AVR microcontroller. The main control system software can perform the functions of communication, digital signal control, data reading and processing and the like, and the control system adopts an 8-bit AVR microcontroller based on the requirements. The system initialization and the declaration of the application function need the responsibility of the main control system, and the basic flow is as follows: firstly, the SP1 interface can automatically read the configuration file in the SD card module; then judging whether the USB interface module is connected with an upper computer or not and whether the upper computer carries out data transmission or not; if the upper computer does not send data, reading the printing data in the SD card module, or storing the data in the printing data in a receiving buffer area of the SD card module, then processing the received data, and if the data processing does not exist for more than 30 seconds, automatically closing the program control function and stopping the stepping motor; if the upper computer has the transmitted data, the data is read and stored in a cache area received by the serial port. The control system can also be connected with the PC end of the upper computer through the USB interface module in the chip, so that the purpose of reliable and rapid communication is achieved, and the instruction sent by the PC end is directly received to perform printing work.
As an optimized scheme of this embodiment, the temperature detection and control module includes a temperature measurement module and a heating module. The printing material of shower nozzle inside is a heat transfer process who changes into liquid from solid-state, and the temperature control of shower nozzle intracavity not only influences the printing precision, also influences the continuation of printing the process, more directly influences the quality that 3D printed the product, and the temperature of control heating bed can reduce effectively and print the phenomenon such as material broken silk, so temperature control is very important to 3D printing. The temperature control module comprises a temperature measuring part and a heating part. As shown in fig. 5, the work flow is that the voltage division of the thermistor is obtained through the ADC peripheral, so as to determine the resistance thereof, and further obtain the current temperature according to the thermistor score table; the temperature is detected through a PID algorithm after the current temperature is obtained, an actual temperature curve is drawn, the temperature changes of the heating bed and the extrusion head are detected, if the temperature of the extrusion head is lower than the extrusion temperature, the extrusion head cannot be blocked for protection, and the extrusion work can be stopped immediately even if an extrusion command exists. If the temperature is too high, the temperature is immediately fed back to the main control board, so that the extrusion is ineffective, and the rapid, stable and safe temperature control is realized.
As an optimized scheme of the embodiment, the motor driving module chip adopts L298N, the chip is packaged by 15 pins, and the chip internally comprises two high-voltage large-current full-bridge drivers of an H-bridge; the motor works in an eight-beat working mode of a two-phase four-wire stepping motor. The motor drive directly controls the movement of the X axis, the Y axis and the Z axis of the 3D printer, so that the accurate steps are needed in the 3D printing process, and the requirement on the accuracy of the motor is high. As shown in fig. 6, the motor driving chip adopts L298N, and the chip is packaged by 15 pins and contains a high-voltage large-current full-bridge driver with two H-bridges. The chip can be externally connected with a detection resistor, feeds the variable quantity back to a control circuit, regulates speed by a PWM method, is sensitive in response and accurate in speed regulation, and can be used for driving a stepping motor, a direct current motor, a relay coil and the like.
As an optimized solution of this embodiment, the USB interface module is disposed in an 8-bit AVR microcontroller. The 8-bit AVR microcontroller is provided with a self-contained USB communication interface and can directly communicate with an upper computer through the USB interface without an additional USB interface. The highest data transmission speed of the 8-bit AVR microcontroller can reach 12Mb/s, and the 8-bit AVR microcontroller has the characteristics of timely and accurate information, strong anti-interference capability and small area of a circuit board. As shown in FIG. 7, the USB _ Connect port is under software control, and is used to switch R7、R815K Ω external resistance; the USB _ VCC port is used for monitoring the existence of a USB bus power supply; the USB _ D _ N port and the USB _ D _ P port are used for data transmission; the USB _ Up _ Led port is connected with a light emitting diode for displaying the communication state.
As an optimized scheme of this embodiment, the SD card module is connected to the main control system module in an SPI manner. The SD card has the characteristics of small weight, light volume, large storage space, fast data transmission and flexible movement, so that the SD card is very suitable for transmitting and storing the Gcode file finished by 3D model slicing. And the interface is also very simple, a standard SD mode or an SPI mode can be generally selected, and the SPI mode interface can transmit data by only four wires. Therefore, the main system control module is connected in an SPI manner as shown in fig. 8.
For a better understanding of the present invention, the following is a complete description of the working principle of the present invention:
in this embodiment, the electrostatic spinning machine is used as the inner package of the breathable fiber of the product, and the 3D printing is used as the outer package.
1. Preparation before packaging
1.1 preparation before packaging by electrospinning machine
(1) Preparing a solution to be used, filling the solution into a syringe pump, and connecting the syringe pump with the needle fixing device.
(2) The positive power supply clamp is connected with the needle fixing device, and the negative power supply clamp is connected with the fixed receiving plate.
(3) Working parameters of a Baoding Lange LSP02-1B injection pump and a DW-P303-1ACFO high-voltage power supply are set.
1.2, preparation before packaging for 3D printer
(1) Firstly, 3D modeling software such as SoildWorks, 3DMax, AutoCAD and the like is used for three-dimensional modeling, and a model to be printed is stored as STL or other recognizable files.
(2) And loading the file of the 3D model into slicing software for slicing to generate a Gcode file.
(3) And the USB interface module is connected with the upper computer and the 3D printer, so that the Gcode file can be subjected to data transmission and downloaded to a main control system module of the 3D printer.
2. Package (I)
2.1 packaging in an electrostatic spinning machine.
(1) The injection pump gives driving force through the injection pump, the solution is sent out by the needle head, and the jet speed is adjusted through the injection pump.
(2) The high-voltage power supply adjusts the power value, the solution passes through the high-voltage electric field, is formed into filaments and products under the action of the electric field force, and finally forms films.
(3) The rotary motor of the workbench rotates to form an inner film on 4 surfaces of the product, and the manipulator overturns the product to cover the inner packaging film of the breathable fiber on 6 surfaces of the product.
2.23D Printer external packing.
(1) The main control system module starts to work according to the received file instruction, the temperature of the spray head is increased through the temperature detection and control module, the temperature of the spray head reaches the temperature at which materials can be melted, and meanwhile, the temperature of the heating workbench reaches the temperature preset by the instruction. Therefore, the material melted during 3D printing cannot be solidified when contacting the workbench, and the bottom of the model is prevented from deforming.
(2) The main control system module controls the motor driving module to move the mechanical assembly, the extrusion head begins to extrude melted materials, and X, Y, Z controls the motor driving module to move the extrusion head and the workbench.
(3) The melted materials are extruded on the workbench by the spray head and solidified to form an actual model component, the spray head moves accurately according to each section information of the model, and when one layer is formed, the motor ascends to spray another layer until the designed outer packaging mold is printed.
Example 2
According to the content of the design of the control system of the 3D printing-electrospinning packing machine in embodiment 1, a prototype was built to test whether the control system can be used normally. And connecting the 3D printing-electrostatic spinning packaging machine carrying the designed control system to an upper computer, and testing the control system to be effective and usable by using Pronterface software in a code execution mode.
Pronterface software has a variety of functions such as: temperature setting, motor setting, command input, real-time information display, and the like. The Pronterface software is very suitable for testing whether the 3D printing-electrostatic spinning packaging machine is normal in function, and the printer is set through the Pronterface software to detect the motor driving performance and the temperature control performance.
1. Printer motor drive performance test
The purpose of this test is to check whether the mechanical system is normal or not and whether the movement of the motor can be accurately controlled or not through a motion test, so as to meet the design requirements. In order to test the driving performance of the motor of the 3D printer, it is necessary to set the speed and the moving distance of X, Y, Z in the Pronterface software, and then record the pulse frequency to calculate the actual speed according to the formula (1). The relation between the motor speed and the motor driving frequency is v 60f/[ (360/T) M ] … … … … … (1)
In the formula:
ν represents the motor speed (rpm);
f represents a motor driving frequency (Hz);
t represents the step angle;
m represents a subdivision number.
The step angle of the test machine is 1.8 degrees, and the test machine is subdivided into 16 degrees. Before the test, X, Y, Z axis position is reset to zero, and then X-axis moving speed is set to be 60mm/s, Y-axis moving speed is set to be 30mm/s, and Z-axis moving speed is set to be 20mm/s in Pronterface software. Then, in a command input window, a command is input to enable the X-axis motor to move 180mm along the X-axis direction, the Y-axis motor to move 180mm along the Y-axis direction, and the Z-axis motor to move 180mm along the Z-axis direction. The pulse frequency and the actual speed were recorded and the data is tabulated.
TABLE 1 actual and theoretical speeds
According to the result calculated by the chart, the designed control system can accurately control the speed of the motor and meet the designed indexes and requirements.
2. Printer temperature detection and control performance test
The test is mainly used for testing and observing whether the temperature detection and control system can normally operate or not and whether the whole heating process can normally heat according to a designed PID method or not. The PLA material is selected as the heating material in the test, because the PLA has high requirement on temperature control, the ideal melting temperature of the PLA material is 200 degrees, if the temperature is too low, the PLA can not flow out normally, and the work is disturbed; if the temperature is too high, the PLA can bubble or carbonize, thereby clogging the extrusion head.
The extrusion head temperature was set at 200 ° by the Pronterface software and the actual temperature exhibited on the software was observed every 10 seconds and recorded, with the results shown in FIG. 2.
TABLE 2 extrusion head temperature sampling
The test results are: the maximum overshoot temperature was 204 ℃. The maximum overshoot is 2%, and the time required for the temperature adjustment to be stable is about 145 s. The requirement of the design is met, and the temperature control is fast, stable and high in precision.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a 3D prints-electrostatic spinning packagine machine which characterized in that: the device comprises a 3D printer (1), an electrostatic spinning machine (2) and a rack (3), wherein the 3D printer (1) is positioned on the rack (3), and the electrostatic spinning machine (2) is positioned on the side edge of the rack (3);
the 3D printer (1) comprises an extrusion motor (11), a Z-axis motor (12) and an X-axis motor (13), wherein the Z-axis motor (12) and the X-axis motor (13) are respectively located on vertical rods (31) on two sides of the rack (3) and movably connected with the vertical rods (31), a sprayer (111) is arranged at the lower end of the extrusion motor (11), the output end of the Z-axis motor (12) is connected with a Z-axis screw rod (121), the output end of the X-axis motor (13) is connected with an X-axis screw rod (131), and the X-axis screw rod (131) penetrates through a threaded hole of the extrusion motor (11) to be matched with a threaded hole of the extrusion motor (11);
the electrostatic spinning machine (2) comprises a liquid supply system, a fiber collecting system and a voltage loading system, wherein the liquid supply system is positioned on one side of the rack (3), and the fiber collecting system is positioned on the other side of the rack (3);
frame (3) are square frame, and frame (3) bottom surface is provided with workstation (32), frame (3) bottom surface is equipped with Y axle motor (14) and workstation rotating electrical machines, workstation (32) are all connected to Y axle motor and workstation rotating electrical machines.
2. The 3D printing-electrospinning packaging machine of claim 1, wherein: the output end of the Z-axis motor (12) is connected with a Z-axis screw rod (121) in the box body, in which the X-axis motor (13) is located, through a belt (122).
3. The 3D printing-electrospinning packaging machine of claim 1, wherein: the liquid supply system comprises an injection pump, a needle head (21) and a needle head fixing device (22), the output end of the injection pump is connected with the needle head (21), and the needle head (21) is arranged in the needle head fixing device (22); the fiber collecting system comprises a fixed receiving plate (23) and a sliding clamping groove, and the fixed receiving plate (23) is opposite to the needle head (21); the voltage loading system is composed of a high-voltage power supply, the positive pole of the high-voltage power supply is connected with a needle fixing device (22), and the negative pole of the high-voltage power supply is connected with a fixed receiving plate (23).
4. The 3D printing-electrospinning packaging machine of claim 3, wherein: the injection pump is a Baoding Lange LSP02-1B injection pump, and the high-voltage power supply is a DW-P303-1ACFO high-voltage power supply.
5. A control system for controlling the 3D printing-electrospinning packing machine according to any one of claims 1 to 4, wherein: the system comprises a main control system module, a temperature detection and control module, a motor driving module, a USB interface module and an SD card module;
the temperature detection and control module is used for detecting and controlling the temperature of the spray head (111) and the workbench (32), and is communicated with the main control system module; the motor driving module is used for controlling the operation of a motor and is communicated with the main control system module; the USB interface module is used for signal transmission between the main control system module and the upper computer; the SD card module is used for storing 3D printing data and is communicated with the main control system module.
6. The control system of the 3D printing-electrospinning packing machine according to claim 5, wherein: the main control system module adopts an 8-bit AVR microcontroller.
7. The control system of the 3D printing-electrospinning packing machine according to claim 5, wherein: the temperature detection and control module comprises a temperature measurement module and a heating module.
8. The control system of the 3D printing-electrospinning packing machine according to claim 5, wherein: the motor driving module chip is L298N, the chip is packaged by 15 pins, and two H-bridge high-voltage large-current full-bridge drivers are arranged in the chip; the motor works in an eight-beat working mode of a two-phase four-wire stepping motor.
9. The control system of the 3D printing-electrospinning packing machine according to claim 6, wherein: the USB interface module is arranged in the 8-bit AVR microcontroller.
10. The control system of the 3D printing-electrospinning packing machine according to claim 5, wherein: the SD card module is connected with the main control system module in an SPI mode.
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| CN201810602553.2A CN108790160B (en) | 2018-06-12 | 2018-06-12 | 3D prints-electrostatic spinning packagine machine and control system thereof |
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| CN108790160B true CN108790160B (en) | 2020-06-16 |
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| CN1224435A (en) * | 1997-04-25 | 1999-07-28 | 连津格股份公司 | Method for producing cellulose formed parts |
| EP2222902A2 (en) * | 2007-12-11 | 2010-09-01 | Basf Se | Process for producing nano- and mesofibres by electrospinning colloidal dispersions comprising at least one essentially water-insoluble polymer |
| CN104099675A (en) * | 2014-07-25 | 2014-10-15 | 北京化工大学 | Electrostatic spinning device available for 3D (three-dimensional) printing |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3726749A (en) * | 1971-06-17 | 1973-04-10 | Koehring Co | Heat sealing apparatus and method |
| CN1224435A (en) * | 1997-04-25 | 1999-07-28 | 连津格股份公司 | Method for producing cellulose formed parts |
| EP2222902A2 (en) * | 2007-12-11 | 2010-09-01 | Basf Se | Process for producing nano- and mesofibres by electrospinning colloidal dispersions comprising at least one essentially water-insoluble polymer |
| CN104099675A (en) * | 2014-07-25 | 2014-10-15 | 北京化工大学 | Electrostatic spinning device available for 3D (three-dimensional) printing |
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