CN209775551U - Three-dimensional inkjet printer who piezoceramics control beats printer head and three-dimensional inkjet printer thereof - Google Patents
Three-dimensional inkjet printer who piezoceramics control beats printer head and three-dimensional inkjet printer thereof Download PDFInfo
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- CN209775551U CN209775551U CN201920600259.8U CN201920600259U CN209775551U CN 209775551 U CN209775551 U CN 209775551U CN 201920600259 U CN201920600259 U CN 201920600259U CN 209775551 U CN209775551 U CN 209775551U
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Abstract
The utility model discloses a three-dimensional printer of piezoceramics control beats printer head and three-dimensional printer thereof, its beat printer head is including printing the nozzle, the heating melting room, feed arrangement and cooling device, the heating melting room is through high temperature resistant pipeline intercommunication printing nozzle, the feed arrangement control heats the feed rate of melting room, and produce the malleation to the heating melting room, cooling device regulates and controls the temperature of heating melting room, it is provided with accuse pressure device to print the nozzle, accuse pressure device contains the piezoceramics piece, the piezoceramics piece realizes deformation expansion and shrink through applying the PWM ripples, thereby control the hydraulic pressure in the printing nozzle; its piezoceramics control's three-dimensional inkjet printer adopts the aforesaid to beat printer head, the utility model has the advantages of prevent that the shower nozzle blocks up, ejection of compact speed control is accurate.
Description
Technical Field
the utility model relates to a quick shaping technical field, in particular to three-dimensional inkjet printer of piezoceramics control beats printer head and three-dimensional inkjet printer thereof.
Background
Three-dimensional printing is an accumulation manufacturing technology, namely a rapid prototyping technology, which is a technology for manufacturing a three-dimensional object by printing layers of adhesive materials on the basis of a digital model file and by applying the adhesive materials such as special wax materials, powdered metals or plastics and the like. The design process is as follows: the method is characterized in that firstly, modeling is carried out through computer modeling software, and then the built three-dimensional model is divided into sections, namely slices, layer by layer, so as to guide a printer to print layer by layer. As an overall structure of the three-dimensional printer, reference may be made to a three-dimensional printer (CN 206781017U) disclosed in the patent document, and as shown in fig. 1, the three-dimensional printer mainly includes a frame 1a, a feeding unit 2a, a printing head 3a, a printing head moving mechanism 4a, and a printing platform 5 a.
The most common three-dimensional printer printing head in the market adopts FDM technology, namely melting and stacking molding. The structure and principle of the three-dimensional printer head can refer to the printing head disclosed in the patent document and the three-dimensional printer CN203779870U, as shown in FIG. 2, a hot-melt wire (usually ABS or PLA material) is firstly wound on a feed roller, the roller is driven to rotate by a stepping motor, the wire is sent out to a nozzle of an extruder under the friction force of an automatic roller and a driven roller, a guide sleeve is arranged between the feed roller and the nozzle, the guide sleeve is made of a low-friction material so that the wire can be smoothly and accurately sent to an inner cavity of the nozzle by the feed roller, a resistance wire type heater is arranged above the nozzle, the wire is heated to a molten state under the action of the heater, then the material is extruded to a working table by the extruder, and the cross section of a workpiece is formed after the material is cooled; as shown in fig. 3, the print head mainly includes a print nozzle 1b, a heating and melting chamber 2b, a feeding device 3b, a cooling device 4b, and a supply pressure device 5 b.
However, problems common to existing printheads are: the shower nozzle easily blocks, and ejection of compact speed is not accurate, and load control accuracy is on the low side. Through research on the structure of the conventional printing head, the project finds that the main factors causing the problems are as follows: the pressure device of the printing head pressurizes the whole heating and melting chamber, the space of the heating and melting chamber is large, on one hand, the pressure device enables the heating and melting chamber to reach the set pressure intensity for a period of reaction time, so that the reaction of the printing nozzle on the discharging speed generated by the pressure of the pressure device also has certain hysteresis, the discharging speed of the printing nozzle is not linearly consistent with the pressure of the pressure device, the discharging speed of the printing nozzle is further inaccurately controlled, and the discharging amount control precision is low; on the other hand, the pressure conduction of the hot melting material in the printing nozzle to the heating melting chamber is greatly attenuated, so that the pressure at the nozzle is low, and the nozzle is easily blocked.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose that will realize is: a three-dimensional printer head controlled by piezoelectric ceramics and capable of preventing the blockage of the spray head and accurately controlling the discharging speed and a three-dimensional printer thereof are designed.
In order to realize the technical purpose, the utility model adopts the technical scheme that:
the first scheme is as follows: a three-dimensional printer printing head controlled by piezoelectric ceramics comprises a printing nozzle 31, a heating and melting chamber 32, a feeding device 33 and a cooling device 34, wherein the heating and melting chamber 32 is communicated with the printing nozzle 31 through a high-temperature-resistant pipeline, the feeding device 33 controls the feeding rate of the heating and melting chamber 32 and generates positive pressure to the heating and melting chamber 32, and the cooling device 34 regulates and controls the temperature of the heating and melting chamber 32;
The method is characterized in that: print nozzle 31 is provided with accuse pressure device 311, accuse pressure device 311 presses window 3111, high temperature resistant elastic film 3112, piezoceramics piece 3113 and closing cap 3114 including the accuse, accuse pressure window 3111 is the opening that sets up at print nozzle 31 top or side, accuse pressure window 3111 inboard is sealed through high temperature resistant elastic film 3112, high temperature resistant elastic film 3112's lateral surface is provided with piezoceramics piece 3113, piezoceramics piece 3113's lateral surface is provided with closing cap 3114, high temperature resistant elastic film 3112 is hugged closely to piezoceramics piece 3113's medial surface, piezoceramics piece 3113 lateral surface is hugged closely to closing cap 3114 medial surface, the inside surface of closing cap 311 covers has the insulating layer, closing cap 3114 is on accuse pressure window 311, the interior hydraulic pressure of nozzle 31 is printed through applying PWM ripples control to piezoceramics piece 3113 both ends.
the working principle is as follows: the essence of this feature is that the printing nozzle 31 is provided with hydraulic control means to achieve locally precise control of the hydraulic pressure in the printing nozzle 31. The specific working principle is as follows: when control system 6 adds a PWM ripples for piezoceramics piece 3113 both ends, piezoceramics will produce deformation, thereby extrude the liquid in the print nozzle 31 part away, the duty cycle of PWM ripples is big more, the drop volume that the single was extruded is just big more, the quantity of the PWM ripples of applying in the unit interval is big more, the drop quantity of extruding is just more, consequently, the speed that the drop was extruded can be controlled to the frequency of PWM ripples, the size of dropping the drop is controlled to the duty cycle of PWM ripples, thereby can be effectual promotion ejection of compact speed control accurate and the ejection of compact is accurate, improve printing speed and precision. And because the vibration of piezoceramics piece 3113, the hydraulic pressure of printing nozzle 31 is nearly pulsed changes, can effectively prevent liquid material because pressure is littleer and block up.
To further optimize illustration, the pressure control window 3111 is located at the top of the print nozzle 31.
further preferably, a check valve 312 is disposed inside the mouth end of the printing nozzle 31, the check valve 312 includes a hole seat 3121 and a high temperature resistant elastic membrane 3122, a through hole 3123 is disposed in the center of the hole seat 3121, the high temperature resistant elastic membrane 3122 is located below the through hole 3123, and one end of the high temperature resistant elastic membrane 3122 is fixed to the bottom surface of the hole seat 3121.
To further optimize the description, a thermostat 313 is provided on the outside of the printing nozzle 31.
further optimize and explain, the printing head 3 is also provided with a supply pressure device 35, the hydraulic pressure of the heating and melting chamber 32 is controlled by the supply pressure device 35, and during the printing working state, the supply pressure device 35 is used for controlling the outflow speed of the liquid material in the heating and melting chamber 32, so as to control the accurate discharging of the printing nozzle 31 by matching with the piezoelectric ceramic plate 3113, and during the printing stopping state, the supply pressure device 35 controls the heating and melting chamber 32 to be negative pressure, so as to suck the material in the printing nozzle 31 into the heating and melting chamber 32.
scheme II: a three-dimensional printer controlled by piezoelectric ceramics comprises a frame 1, a feeding unit 2, a printing head 3, a moving driving mechanism 4, a printing platform 5 and a control system 6; the movement driving mechanism 4 comprises an X axial movement assembly 41, a Y axial movement assembly 42 and a Z axial movement assembly 43; the printing head 3 is mounted on a moving member of the X-axis moving assembly 41, a fixed member of the X-axis moving assembly 41 is mounted on a moving member of the Y-axis moving assembly 42, a fixed member of the Y-axis moving assembly 42 is fixedly mounted on the frame 1, and the printing platform 5 is mounted on the frame 1 through the Z-axis moving assembly 43; the printing head 3 is positioned above the printing platform 5, the feeding unit 2 and the control system 6 are respectively fixed on two side edges of the frame 1, the feeding unit 2 is communicated with the printing head 3, and the control system 6 is in control connection with the printing head 3 and the moving driving mechanism 4;
the method is characterized in that: the printing head 3 adopts the piezoelectric ceramic controlled three-dimensional printer printing head in the scheme; the wire connection control system 6 at piezoceramics piece 3113 both ends, control system 6 applys the PWM ripples to piezoceramics piece 3113's both ends.
Further, the X-axis moving assembly 41 is a through linear screw rod progressive motor, the motor part is a moving part, and the screw rod is a fixed part; the Y-axis moving assembly 42 is a penetrating linear screw rod progressive motor, the motor part is a moving part, and the screw rod is a fixing part; the Z-axis moving assembly 43 is a nut moving lead screw elevator.
further preferably, the movement ranges of the movement driving mechanism 4 in the X-axis direction, the Y-axis direction and the Z-axis direction are 0 to 20 or 30cm, 0 to 20 or 30cm and 0 to 20 or 30cm, respectively.
Further, the feeding unit 2 comprises two cavities, and the two cavities are used for loading two hot-melt wires made of different materials; the print head 3 includes two print nozzles 31, and each of the two print nozzles 31 has a corresponding heating and melting chamber 32 and a corresponding feeding device 33.
in a further optimized way, the feeding unit 2 comprises two cavities, wherein one cavity is a cavity for loading liquid colloid material, and the other cavity is a cavity for loading hot-melt wires; the print head 3 includes two print nozzles 31, and each of the two print nozzles 31 has a corresponding heating and melting chamber 32 and a corresponding feeding device 33.
Further, the control system 6 is a microcomputer system having modeling software and a three-dimensional printing module, and a modeling model of the computer modeling software is transmitted to the three-dimensional printing module.
Has the advantages that: the three-dimensional printer head controlled by piezoelectric ceramics and the three-dimensional printer thereof of the utility model can control the hydraulic pressure of the printing nozzle 31 locally by arranging the hydraulic control device on the printing nozzle 31, thereby controlling the discharging speed of the printing nozzle 31, and compared with the speed control mode in the background technology, the three-dimensional printer head can effectively prevent the reduction and the hysteresis of the pressure control; meanwhile, the hydraulic pressure is controlled by controlling the deformation of the piezoelectric ceramic through PWM waves, the frequency of the PWM waves can control the extrusion speed of liquid drops, and the duty ratio of the PWM waves controls the size of the dripping liquid drops, so that the control accuracy of the discharging speed and the discharging amount can be effectively improved, and the printing speed and the printing accuracy are improved.
The explanations in the above regarding terms and prior art components are as follows:
Piezoelectric ceramic piece: the electronic sound producing element has piezoelectric ceramic dielectric material set between two copper circular electrodes, and when AC audio signal is connected to the electrodes, the piezoelectric sheet will vibrate according to the signal frequency to produce corresponding sound. The piezoelectric ceramic piece has simple structure and low cost, and is widely applied to electronic appliances in the aspects of: toys, electronic phonic watches, electronic instruments, electronic clocks, timers, etc.
PWM is pulse width modulation, namely a pulse waveform with variable duty ratio. Pulse width modulation is a method of digitally encoding the level of an analog signal. Through the use of high resolution counters, the duty cycle of the square wave is modulated to encode the level of a particular analog signal. The PWM signal is still digital because at any given time, the full magnitude dc supply is either completely present (ON) or completely absent (OFF). The voltage or current source is applied to the analog load in a repetitive pulse train of ON (ON) or OFF (OFF). The on-time is when the dc supply is applied to the load and the off-time is when the supply is disconnected. Any analog value can be encoded using PWM as long as the bandwidth is sufficient.
A stepping motor: the open-loop control element step motor device converts an electric pulse signal into angular displacement or linear displacement; in the non-overload condition, the rotation speed and stop position of the motor only depend on the frequency and pulse number of the pulse signal, and are not influenced by the load change, when the stepping driver receives a pulse signal, the stepping driver drives the stepping motor to rotate by a fixed angle in a set direction, namely a stepping angle, and the rotation of the stepping motor is operated by one step at the fixed angle. The angular displacement can be controlled by controlling the number of pulses, so that the aim of accurate positioning is achieved, and meanwhile, the rotating speed and the acceleration of the motor can be controlled by controlling the pulse frequency, so that the aim of speed regulation is achieved.
a linear stepping motor: the linear stepping motor converts rotary motion into linear motion inside the motor.
a screw rod lifter: the lifting height can be accurately controlled and adjusted according to a certain program, and the lifting height can be widely applied to various fields of machinery, metallurgy, building, chemical industry, medical treatment, cultural hygiene, three-dimensional printing and the like.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a three-dimensional printer in the background art;
FIG. 2 is a schematic diagram of a material transportation principle of a printer in the background art;
FIG. 3 is a schematic diagram of a printhead structure of a printer according to the prior art;
FIG. 4 is a schematic structural diagram of a printhead 3 according to a first embodiment;
FIG. 5 is a schematic structural diagram of a print nozzle 31 according to a first embodiment;
FIG. 6 is an enlarged view of portion A of FIG. 5;
FIG. 7 is a schematic view showing the overall configuration of a three-dimensional printer according to a second embodiment;
FIG. 8 is a schematic view showing the structure of a print nozzle 31 according to a third embodiment;
FIG. 9 is a schematic structural view of a print head 3 according to a fourth embodiment;
FIG. 10 is a schematic structural view of a print nozzle 31 according to a fifth embodiment;
In the drawings:
1 is a frame, 2 is a feeding unit, 3 is a printing head, 31 is a printing nozzle, 311 is a pressure control device, 3111 is a pressure control window, 3112 is a high temperature resistant elastic film, 3113 is a piezoelectric ceramic sheet, 3114 is a sealing sheet, 32 is a heating and melting chamber, 33 is a feeding device, 34 is a cooling device, 35 is a feeding pressure device, 312 is a one-way valve, 3121 is a hole seat, 3122 is a high temperature resistant elastic film, 3123 is a through hole, 313 is a constant temperature device, 4 is a movement driving mechanism, 41 is an X axial movement component, 42 is a Y axial movement component, 43 is a Z axial movement component, 5 is a printing platform, and 6 is a control system.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; it is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
A three-dimensional printer printing head controlled by piezoelectric ceramics is shown in figure 4 and comprises a printing nozzle 31, a heating and melting chamber 32, a feeding device 33 and a cooling device 34, wherein the heating and melting chamber 32 is communicated with the printing nozzle 31 through a high-temperature-resistant pipeline, the feeding device 33 controls the feeding rate of the heating and melting chamber 32 and generates positive pressure to the heating and melting chamber 32, and the cooling device 34 regulates and controls the temperature of the heating and melting chamber 32;
as shown in fig. 5 and 6, the print nozzle 31 is provided with a pressure control device 311, the pressure control device 311 includes a pressure control window 3111, a high temperature resistant elastic film 3112, a piezoelectric ceramic sheet 3113 and a cover 3114, the pressure control window 3111 is a through opening disposed at the top of the print nozzle 31, the inner side of the pressure control window 3111 is sealed by the high temperature resistant elastic film 3112, the outer side of the high temperature resistant elastic film 3112 is provided with the piezoelectric ceramic sheet 3113, the outer side of the piezoelectric ceramic sheet 3113 is provided with the cover 3114, the inner side of the piezoelectric ceramic sheet 3113 is tightly attached to the high temperature resistant elastic film 3112, the inner side of the cover 3114 is tightly attached to the outer side of the piezoelectric ceramic sheet 3113, the inner side of the cover 311 is covered with an insulating layer, the cover 3114 is covered on the pressure control window 311, and the two ends of the piezoelectric ceramic sheet 3113 control the.
As a more specific description of the above embodiment, a thermostat 313 is provided outside the print nozzle 31. The thermostat 313 is a thermostat control device having a heat source and a thermostat switch.
The working principle is as follows: the essence of this feature is that the printing nozzle 31 is provided with hydraulic control means to achieve locally precise control of the hydraulic pressure in the printing nozzle 31. The specific working principle is as follows: when control system 6 adds a PWM ripples for piezoceramics piece 3113 both ends, piezoceramics will produce deformation, thereby extrude the liquid in the print nozzle 31 part away, the duty cycle of PWM ripples is big more, the drop volume that the single was extruded is just big more, the quantity of the PWM ripples of applying in the unit interval is big more, the drop quantity of extruding is just more, consequently, the speed that the drop was extruded can be controlled to the frequency of PWM ripples, the size of dropping the drop is controlled to the duty cycle of PWM ripples, thereby can be effectual promotion ejection of compact speed control accurate and the ejection of compact is accurate, improve printing speed and precision. And because the vibration of piezoceramics piece 3113, the hydraulic pressure of printing nozzle 31 is nearly pulsed changes, can effectively prevent liquid material because pressure is littleer and block up.
Example two:
A three-dimensional printer controlled by piezoelectric ceramics is shown in figure 7 and comprises a frame 1, a feeding unit 2, a printing head 3, a moving driving mechanism 4, a printing platform 5 and a control system 6; the movement driving mechanism 4 comprises an X axial movement assembly 41, a Y axial movement assembly 42 and a Z axial movement assembly 43; the printing head 3 is mounted on a moving member of the X-axis moving assembly 41, a fixed member of the X-axis moving assembly 41 is mounted on a moving member of the Y-axis moving assembly 42, a fixed member of the Y-axis moving assembly 42 is fixedly mounted on the frame 1, and the printing platform 5 is mounted on the frame 1 through the Z-axis moving assembly 43; the printing head 3 is positioned above the printing platform 5, the feeding unit 2 and the control system 6 are respectively fixed on two side edges of the frame 1, the feeding unit 2 is communicated with the printing head 3, and the control system 6 is in control connection with the printing head 3 and the moving driving mechanism 4;
the printing head 3 adopts a piezoelectric ceramic controlled three-dimensional printer printing head implemented in the first embodiment, the piezoelectric ceramic piece 3113 is connected with a control system 6 through an electric wire, and the control system 6 applies PWM waves to two ends of the piezoelectric ceramic piece 3113.
As a more specific description of the above embodiment, the X-axis moving assembly 41 is a penetrating linear screw rod stepping motor, the motor part is a moving part, and the screw rod is a fixed part; the Y-axis moving assembly 42 is a penetrating linear screw rod progressive motor, the motor part is a moving part, and the screw rod is a fixing part; the Z-axis moving assembly 43 is a nut moving lead screw elevator.
As a more specific description of the above embodiment, the control system 6 is a microcomputer system having modeling software and a three-dimensional printing module, and a modeling model of the computer modeling software is transmitted to the three-dimensional printing module.
As a further specific explanation of the above embodiment, the movement ranges of the movement driving mechanism 4 in the X-axis direction, the Y-axis direction, and the Z-axis direction are 0 to 20cm, and 0 to 20cm, respectively.
As a further concrete description of the above embodiment, the feeding unit 2 comprises two cavities for loading two hot-melt wires of different materials; the print head 3 includes two print nozzles 31, and each of the two print nozzles 31 has a corresponding heating and melting chamber 32 and a corresponding feeding device 33.
the specific working principle of this embodiment is as follows: when control system 6 adds a PWM ripples for piezoceramics piece 3113 both ends, piezoceramics will produce deformation, thereby extrude the liquid in the print nozzle 31 part away, the duty cycle of PWM ripples is big more, the drop volume that the single was extruded is just big more, the quantity of the PWM ripples of applying in the unit interval is big more, the drop quantity of extruding is just more, consequently, the speed that the drop was extruded can be controlled to the frequency of PWM ripples, the size of dropping the drop is controlled to the duty cycle of PWM ripples, thereby can be effectual promotion ejection of compact speed control accurate and the ejection of compact is accurate, improve printing speed and precision. And because the vibration of piezoceramics piece 3113, the hydraulic pressure of printing nozzle 31 is nearly pulsed changes, can effectively prevent liquid material because pressure is littleer and block up.
Through the embodiment, the minimum printing scribing width of the printing head can reach 100um, and the printing head has better fineness.
Example three:
The three-dimensional printer controlled by the piezoelectric ceramics is different from the second embodiment in that: as shown in fig. 8, a check valve 312 is disposed inside the mouth end of the printing nozzle 31, the check valve 312 includes a hole seat 3121 and a high temperature resistant elastic membrane 3122, a through hole 3123 is disposed in the center of the hole seat 3121, the high temperature resistant elastic membrane 3122 is located below the through hole 3123, and one end of the high temperature resistant elastic membrane 3122 is fixed to the bottom surface of the hole seat 3121.
The effect of the implementation of the embodiment relative to the second embodiment is as follows: effectively reducing the backflow of material at the mouth end of the print nozzle 31. The mechanism is as follows: the positive pressure of the heating and melting chamber 32 presses the liquid material into the printing nozzle 31, but when the duty ratio of PWM waves at two ends of the piezoelectric ceramic sheet 3113 is large, the time of contraction and deformation of the piezoelectric ceramic sheet 3113 is short, the positive pressure of the heating and melting chamber 32 is small, and the liquid material cannot be pressed into the printing nozzle 31 in time, so that the liquid material at the end of the nozzle of the printing nozzle 31 is easy to cause backflow and rise; by providing a one-way valve arrangement, the backflow of material at the mouth end of the print nozzle 31 can be reduced.
Example four:
The three-dimensional printer controlled by the piezoelectric ceramics is different from the second embodiment in that: as shown in fig. 9, the printing head 3 is further provided with a feeding pressure device 35, the feeding pressure device 35 controls the hydraulic pressure of the heating and melting chamber 32, when in a printing operation state, the feeding pressure device 35 is used for controlling the outflow speed of the liquid material in the heating and melting chamber 32, so as to control the accurate discharging of the printing nozzle 31 by matching with the piezoelectric ceramic plate 3113, and when in a printing stop state, the feeding pressure device 35 controls the heating and melting chamber 32 to be in a negative pressure state, so as to suck the material in the printing nozzle 31 into the heating and melting chamber 32.
Through this kind of structure, the speed that liquid material flows to print nozzle 31 from heating melting chamber 32 can be synchronous with print nozzle 31's ejection of compact speed to better promotion ejection of compact precision.
example five:
the three-dimensional printer controlled by the piezoelectric ceramics is different from the second embodiment in that: as shown in fig. 10, the pressure control window 3111 is located at a side edge of the printing nozzle 31.
Example six:
The three-dimensional printer controlled by the piezoelectric ceramics is different from the second embodiment in that: the movement ranges of the movement driving mechanism 4 in the X-axis direction, the Y-axis direction and the Z-axis direction are 0 to 30cm, 0 to 30cm and 0 to 30cm, respectively.
Example seven:
A three-dimensional printer controlled by piezoelectric ceramics is different from the first embodiment in that: the feeding unit 2 comprises two cavities, wherein one cavity is a cavity for loading liquid colloid materials, the other cavity is a cavity for loading hot-melting wires, the cavity for loading the liquid colloid materials is communicated with the feeding device 33 and the heating and melting chamber 32 through a sealing pipeline, the cavity for loading the liquid colloid materials is loaded with conductive silver paste, and the cavity for loading the hot-melting wires is loaded with filamentous insulating rubber. By this embodiment, for printing a planar transformer, the steps are: s1, establishing a three-dimensional model of the planar transformer through computer modeling software; s2, sending the modeling model of the computer modeling software to a three-dimensional printing module; and S3, manufacturing the planar transformer by using conductive silver paste and an insulating material as materials through the three-dimensional printing module.
The planar transformer printed by the embodiment has the advantages that: 1. high current density; 2. high efficiency, the efficiency can reach 98% -99%; 3. low leakage inductance, about 0.2% of the primary inductance; 4. the volume is small; 5. the working frequency range is wide, and the frequency can reach 1MHz at most.
description of the embodiments described above: since the control system 6 according to the above-described embodiment is a related art of three-dimensional printing and is not the point of the present application, and the control system 6 relates to software control, the circuit modules and the control principle of the control system 6 will not be described in detail in this description.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (9)
1. a three-dimensional printer printing head controlled by piezoelectric ceramics comprises a printing nozzle (31), a heating and melting chamber (32), a feeding device (33) and a cooling device (34), wherein the heating and melting chamber (32) is communicated with the printing nozzle (31) through a high-temperature-resistant pipeline, the feeding device (33) controls the feeding rate of the heating and melting chamber (32) and generates positive pressure to the heating and melting chamber (32), and the cooling device (34) regulates and controls the temperature of the heating and melting chamber (32); the method is characterized in that: the printing nozzle (31) is provided with a pressure control device (311), the pressure control device (311) comprises a pressure control window (3111), a high-temperature resistant elastic film (3112), a piezoelectric ceramic piece (3113) and a sealing cover (3114), the pressure control window (3111) is a through hole arranged at the top or the side edge of the printing nozzle (31), the inner side of the pressure control window (3111) is sealed through the high-temperature resistant elastic film (3112), the outer side surface of the high-temperature resistant elastic film (3112) is provided with the piezoelectric ceramic piece (3113), the outer side surface of the piezoelectric ceramic piece (3113) is provided with the sealing cover (3114), the inner side surface of the piezoelectric ceramic piece (3113) is tightly attached to the high-temperature resistant elastic film (3112), the inner side surface of the sealing cover (3114) is tightly attached to the outer side surface of the piezoelectric ceramic plate (3113), the inner side surface of the sealing cover (3114) is coated with an insulating layer, the cover (3114) covers the pressure control window (3111), and both ends of the piezoelectric ceramic sheet (3113) control the hydraulic pressure in the printing nozzle (31) by applying PWM waves.
2. the piezoceramic controlled three-dimensional printer printhead according to claim 1, wherein: the inner side of the mouth end of the printing nozzle (31) is provided with a one-way valve (312), the one-way valve (312) comprises a hole seat (3121) and a high-temperature-resistant elastic membrane (3122), a through hole (3123) is formed in the center of the hole seat (3121), the high-temperature-resistant elastic membrane (3122) is located below the through hole (3123), and one end of the high-temperature-resistant elastic membrane (3122) is fixed to the bottom surface of the hole seat (3121).
3. The piezoceramic controlled three-dimensional printer printhead according to claim 1, wherein: the pressure control window (3111) is located at the top of the print nozzle (31).
4. The piezoceramic controlled three-dimensional printer printhead according to claim 1, wherein: a thermostat (313) is arranged on the outer side of the printing nozzle (31).
5. the piezoceramic controlled three-dimensional printer printhead according to claim 1, wherein: the printing head (3) is also provided with a feed pressure device (35), and the feed pressure device (35) controls the hydraulic pressure of the heating melting chamber (32).
6. A three-dimensional printer controlled by piezoelectric ceramics comprises a rack (1), a feeding unit (2), a printing head (3), a moving driving mechanism (4), a printing platform (5) and a control system (6); the movement driving mechanism (4) comprises an X-axis movement assembly (41), a Y-axis movement assembly (42) and a Z-axis movement assembly (43); the printing head (3) is mounted on a moving piece of the X-axis moving assembly (41), a fixing piece of the X-axis moving assembly (41) is mounted on a moving piece of the Y-axis moving assembly (42), a fixing piece of the Y-axis moving assembly (42) is fixedly mounted on the rack (1), and the printing platform (5) is mounted on the rack (1) through the Z-axis moving assembly (43); the printing head (3) is positioned above the printing platform (5), the feeding unit (2) and the control system (6) are respectively fixed on two side edges of the rack (1), the feeding unit (2) is communicated with the printing head (3), and the control system (6) is in control connection with the printing head (3) and the moving driving mechanism (4); the method is characterized in that: the print head (3) adopts the piezoelectric ceramic controlled three-dimensional printer print head of claim 1, and the control system (6) applies PWM waves to two ends of the piezoelectric ceramic piece (3113).
7. The piezoceramic controlled three-dimensional printer according to claim 6, wherein: the X-axis moving assembly (41) is a penetrating linear screw rod progressive motor, the motor part is a moving part, and the screw rod is a fixing part; the Y-axis moving assembly (42) is a penetrating linear screw rod progressive motor, the motor part is a moving part, and the screw rod is a fixing part; the Z-axis moving assembly (43) is a nut moving type screw rod lifter.
8. The piezoceramic controlled three-dimensional printer according to claim 6, wherein: the movement ranges of the X-axis direction, the Y-axis direction and the Z-axis direction of the movement driving mechanism (4) are 0-20 cm, 0-20 cm and 0-20 cm respectively.
9. The piezoceramic controlled three-dimensional printer according to claim 6, wherein: the feeding unit (2) comprises two cavities, the two cavities are used for loading hot-melt wires made of two different materials, the printing head (3) comprises two printing nozzles (31), and the two printing nozzles (31) are respectively provided with a heating melting chamber (32) and a feeding device (33) corresponding to the two printing nozzles.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113233021A (en) * | 2021-05-28 | 2021-08-10 | 中冶宝钢技术服务有限公司 | Powder storage device and powder filling method |
| WO2021206604A1 (en) * | 2020-04-07 | 2021-10-14 | L3F Sweden Ab | Valve assembly for ejection of a viscous media in a 3d printing device |
| WO2024000652A1 (en) * | 2022-06-28 | 2024-01-04 | 黄河科技学院 | Dual-compartment heating-type 3d printer nozzle structure used for liquid metal, and printer |
-
2019
- 2019-04-29 CN CN201920600259.8U patent/CN209775551U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021206604A1 (en) * | 2020-04-07 | 2021-10-14 | L3F Sweden Ab | Valve assembly for ejection of a viscous media in a 3d printing device |
| CN113233021A (en) * | 2021-05-28 | 2021-08-10 | 中冶宝钢技术服务有限公司 | Powder storage device and powder filling method |
| CN113233021B (en) * | 2021-05-28 | 2022-07-19 | 中冶宝钢技术服务有限公司 | Powder storage device and powder filling method |
| WO2024000652A1 (en) * | 2022-06-28 | 2024-01-04 | 黄河科技学院 | Dual-compartment heating-type 3d printer nozzle structure used for liquid metal, and printer |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 Termination date: 20210429 |