CN112428580B - Printing spray head for 3D biological printing - Google Patents
Printing spray head for 3D biological printing Download PDFInfo
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- CN112428580B CN112428580B CN202011336881.6A CN202011336881A CN112428580B CN 112428580 B CN112428580 B CN 112428580B CN 202011336881 A CN202011336881 A CN 202011336881A CN 112428580 B CN112428580 B CN 112428580B
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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
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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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
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
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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
- B29C64/295—Heating elements
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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
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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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
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Ink Jet (AREA)
Abstract
The invention relates to a printing spray head for 3D biological printing, which comprises a spray head and a heating mechanism wrapping the outer side surface of the spray head, wherein the heating mechanism comprises a thermal resistance wire, a conduit, a circular columnar through hole is formed in the upper end surface of the conduit, the thermal resistance wire is arranged along the inner ring surface of the circular columnar through hole, a fixing seat is arranged outside the conduit and used for limiting the heating mechanism, a connecting plate is arranged at the back of the fixing seat, and the connecting plate is fixed with the fixing seat through adsorption of heteropolarity rubidium magnets; the heat resistance wire is connected with a temperature control device, the temperature control device is used for setting temperature parameters of the heating mechanism, a conductive cover plate is arranged between the temperature control device and the heat resistance wire, and the temperature control device and the heat resistance wire form a loop through being connected with the conductive cover plate. The invention is provided with the heating mechanism for wrapping the spray head, and realizes accurate preheating control of printing materials by matching with the temperature control device; the fixing seat for protecting the spray head and the connecting plate fixed with the printer are arranged at the same time, and the connecting plate is connected with the fixing seat in a sucking way, so that the installation and the maintenance are convenient.
Description
Technical Field
The invention relates to the field of 3D biological printing, in particular to a printing nozzle for 3D biological printing.
Background
The 3D printing technology is a rapid prototyping technology, three-dimensional design is firstly carried out through computer software modeling, then slicing treatment is carried out, and finally, an object is constructed in a layer-by-layer printing mode by using powdery metal, plastic, polymer and other bondable materials. The current 3D printing technology mainly includes inkjet printing technology, pressure-assisted technology, laser-assisted technology, and photo-curing stereoscopic printing technology. Among them, the materials used for printing by pressure-assisted techniques are usually liquids or dispersions, the majority of which form continuous filaments by means of gas-pressure-coordinated extrusion movements under the action of microscale nozzles or micropores fixed to a substrate.
The 3D printing nozzle is used as a core object of the pneumatic 3D printer, so that the printing quality is determined to a great extent. The smoothness of the extruded filaments and the temperature of the extruded filaments directly influence the accuracy of 3D printing. At this stage, the temperature required for printing is typically the initial heating of the solution or dispersion, wrapped with a hot towel to prevent heat dissipation. However, this results in uncontrollable printing temperatures required, which can make the filaments printed before and after a few days different. For printing solutions, bubbles in the solution largely determine the continuity of the filaments. In the past, the solutions were all contained in a closed metal container, and it was not known whether air bubbles were generated during the printing process.
Patent document CN201910555564.4 entitled "3D print head" discloses a print head having an effect of heating a material, but the heating effect is not controllable, and the print quality cannot be ensured.
In addition, the printing head is a vulnerable part, and needs to be frequently replaced and maintained, but printing equipment connected with the printing head is a precise part, so that certain difficulty exists in replacement.
Disclosure of Invention
The invention provides a printing nozzle for 3D biological printing, which solves the problems of low preheating precision of printing materials in the nozzle and difficult maintenance of the nozzle in the existing 3D biological printing process, and is provided with a heating mechanism for wrapping the nozzle, and the heating mechanism is matched with a temperature control device to realize accurate preheating control of the printing materials; the fixing seat for protecting the spray head and the connecting plate fixed with the printer are arranged at the same time, and the connecting plate is connected with the fixing seat in a sucking way, so that the installation and the maintenance are convenient.
In order to achieve the above object, the technical scheme of the present invention is as follows:
The utility model provides a print shower nozzle for 3D biological printing, includes shower nozzle and the heating mechanism of parcel shower nozzle lateral surface, heating mechanism includes thermal resistance silk and pipe, the pipe is square cylinder, and circular column through-hole is seted up to the up end of pipe, follows the interior ring face of circular column through-hole sets up thermal resistance silk, and the outside of pipe is provided with the fixing base, the fixing base is used for heating mechanism spacing, and the back of fixing base is provided with the connecting plate, be provided with heteropolarity rubidium magnet between connecting plate and the fixing base, the connecting plate is fixed through heteropolarity rubidium magnet actuation with the fixing base;
the heat resistance wire is connected with a temperature control device, the temperature control device is used for setting the temperature parameter of the heating mechanism, a conductive cover plate is arranged between the temperature control device and the heat resistance wire, and the temperature control device and the heat resistance wire form a loop through being connected with the conductive cover plate.
Further, U-shaped through holes are formed in one side of the guide pipe, observation plates are arranged corresponding to the U-shaped through holes, each observation plate is a square plate body, U-shaped windows are arranged corresponding to the U-shaped through holes, scales are arranged on the U-shaped windows, the observation plates are used for limiting the guide pipe, and the observation plates are detachably connected with the fixing base.
Further, the upper portion of fixing base is provided with the shrouding, the shrouding is square plate body, and the middle part of shrouding corresponds pipe and fixing base and sets up circular column through-hole, circular column through-hole is inside to be provided with the shower nozzle, the shower nozzle includes storage portion and nozzle, the inside hollow ladder cylindricality structure that storage portion was made for transparent material, and the big footpath end of storage portion is fixed with the up end lock of shrouding, the lateral surface and the thermal resistance silk laminating of path end.
Further, the connecting plate is a hollow convex plate body, and a temperature control device is arranged in the connecting plate; the conductive cover plate is of an inverted stepped quadrangular structure with an inwards concave upper end face, an electrode is arranged on the upper end face of the conductive cover plate, the lower end face of the conductive cover plate is in buckling connection with the upper end face of the connecting plate, and the electrode of the conductive cover plate is used for connecting the temperature control device and the thermal resistance wire to form a loop;
the middle table surface of the connecting plate is a chamfer surface, and the upper end of the connecting plate is connected with the upper end of the fixing seat through mortise and tenon.
Further, the fixing seat comprises an upper part and a lower part, the upper part is a square plate body, the lower end face of the upper part is a bevel face corresponding to the middle table surface of the connecting plate, the lower end face of the upper part is attached to the middle table surface of the connecting plate, and the side inner wall of the upper part is sleeved and connected with the upper quadrangular prism of the connecting plate;
the lower part is a square structure with an open adjacent surface and a hollow inside, and the lower part and the upper part are of an integrated structure.
Further, the connecting plate and the lower part are correspondingly provided with heteropolarity rubidium magnet mounting grooves, threaded holes are formed in the middle of the heteropolarity rubidium magnet correspondingly, and the connecting plate and the lower part are fixedly connected with the heteropolarity rubidium magnet through bolts respectively.
Further, the temperature control device comprises a main control unit, a driving unit, a communication unit and an upper computer, wherein the main control unit comprises an MCU chip, the main control unit is connected with the upper computer through the communication unit, and the main control unit controls the driving unit to output PWM signals to adjust the output power of the heat resistance wires according to instructions of the upper computer.
Through the technical scheme, the invention has the beneficial effects that:
1. The invention is provided with a spray head and a heating mechanism wrapping the outer side surface of the spray head, wherein the heating mechanism comprises a thermal resistance wire and a guide pipe, the guide pipe is a square cylinder, the upper end surface of the guide pipe is provided with a circular columnar through hole, the thermal resistance wire is arranged along the inner ring surface of the circular columnar through hole, the thermal resistance wire is connected with a temperature control device, the temperature control device is used for setting the temperature parameter of the heating mechanism, a conductive cover plate is arranged between the temperature control device and the thermal resistance wire, and the temperature control device and the thermal resistance wire form a loop through being connected with the conductive cover plate.
When the device is used, the upper computer controls the temperature control device to adjust the temperature parameter of the heating mechanism, so that the temperature of the printing material in the current spray nozzle is in a proper state, the problems that the diameter of the extrusion wire of the spray nozzle is unequal, the extrusion wire of the spray nozzle is broken and the like in the printing process are avoided, and the printing quality is ensured.
2. The outside of the catheter is provided with a fixing seat, the fixing seat is used for limiting the heating mechanism, the back of the fixing seat is provided with a connecting plate, a heteropolarity rubidium magnet is arranged between the connecting plate and the fixing seat, and the connecting plate and the fixing seat are fixed by attraction of the heteropolarity rubidium magnet;
one end of the connecting plate is fixed with the printer, the other end of the connecting plate is sucked with the fixing seat, the fixing seat is modularized, when the spray head is replaced or maintained, the connecting plate and the fixing seat are convenient to detach, the conductive cover plate is firstly taken down to enable the heat resistance wire to be powered off, and then the fixing seat and the spray head are taken down from the printer to carry out relevant maintenance operation, so that the printer or the spray head is prevented from being damaged by hard disassembly on the printer.
Drawings
Fig. 1 is one of schematic structural diagrams of a printing head for 3D bioprinting.
Fig. 2 is a second schematic diagram of a print head for 3D bioprinting.
Fig. 3 is a third schematic diagram of a printing head for 3D bio-printing.
Fig. 4 is a schematic diagram of a printing head for 3D bioprinting.
Fig. 5 is a fifth schematic structural view of a printing head for 3D bio-printing.
Fig. 6 is a schematic diagram of a structure of a printing head for 3D bio-printing.
Fig. 7 is a system schematic diagram of a print head for 3D bioprinting.
The reference numerals in the drawings are: 1 is a connecting plate, 2 is a fixed seat, 3 is a sealing plate, 4 is a guide pipe, 5 is an observation plate, 6 is a conductive cover plate, 7 is a spray head, 9 is a heteropolarity rubidium magnet, 10 is a main control unit, 11 is a driving unit, 12 is a communication unit, 201 is an upper part, and 202 is a lower part.
Detailed Description
The invention is further described with reference to the drawings and detailed description which follow:
As shown in fig. 1-7, a printing nozzle for 3D bio-printing comprises a nozzle 7 and a heating mechanism wrapping the outer side surface of the nozzle 7, wherein the heating mechanism comprises a heat resistance wire, a conduit 4 and a square cylinder body of the conduit 4, a circular cylindrical through hole is formed in the upper end surface of the conduit 4, the heat resistance wire is arranged along the inner ring surface of the circular cylindrical through hole, a fixing seat 2 is arranged outside the conduit 4, the fixing seat 2 is used for limiting the heating mechanism, a connecting plate 1 is arranged at the back of the fixing seat 2, a heteropolarity rubidium magnet 9 is arranged between the connecting plate 1 and the fixing seat 2, and the connecting plate 1 and the fixing seat 2 are fixed by attraction of the heteropolarity rubidium magnet 9;
the heat resistance wire is connected with a temperature control device, the temperature control device is used for setting temperature parameters of the heating mechanism, a conductive cover plate 6 is arranged between the temperature control device and the heat resistance wire, and the temperature control device and the heat resistance wire form a loop through being connected with the conductive cover plate 6.
For optimizing the product structure, be convenient for observe the interior material state of pipe 4, U-shaped through-hole has been seted up to one side of pipe 4, corresponds U-shaped through-hole is provided with observation board 5, observation board 5 is square plate body, and corresponds U-shaped through-hole and be provided with the U-shaped window, the U-shaped window is provided with the scale, and observation board 5 is used for pipe 4 spacing, and observation board 5 can dismantle with fixing base 2 and be connected.
In order to avoid the dust to get into pipe 4, the upper portion of fixing base 2 is provided with shrouding 3, shrouding 3 is square plate body, and circular column through-hole is seted up to the middle part of shrouding 3 corresponding pipe 4 and fixing base 2, circular column through-hole is inside to be provided with shower nozzle 7, shower nozzle 7 includes storage portion and nozzle, storage portion is inside hollow ladder cylindric structure that transparent material made, and the big footpath end of storage portion is fixed with the up end lock of shrouding 3, the lateral surface and the thermal resistance silk laminating of path end.
In order to optimize the product structure, the connecting plate 1 is a hollow convex plate body, and a temperature control device is arranged in the connecting plate 1; the conductive cover plate 6 is of an inverted stepped quadrangular structure with an inwards concave upper end face, an electrode is arranged on the upper end face of the conductive cover plate 6, the lower end face of the conductive cover plate 6 is buckled and connected with the upper end face of the connecting plate 1, and the electrode of the conductive cover plate 6 is used for connecting a temperature control device and a thermal resistance wire to form a loop;
The middle table surface of the connecting plate 1 is a chamfer surface, and the upper end of the connecting plate 1 is connected with the upper end of the fixing seat 2 through mortise and tenon joints.
In order to facilitate the installation and the disassembly of the spray head 7 and the printer, the fixing seat 2 comprises an upper part 201 and a lower part 202, the upper part 201 is a square plate body, the lower end surface of the upper part 201 is a bevel surface corresponding to the middle table surface of the connecting plate 1, the lower end surface of the upper part 201 is attached to the middle table surface of the connecting plate 1, and the side inner wall of the upper part 201 is sleeved and connected with the upper quadrangular prism of the connecting plate 1;
The lower part 202 is a square structure with open adjacent surfaces and hollow inside, and the lower part 202 and the upper part 201 are integrated. The connecting plate 1 and the lower portion 202 are correspondingly provided with mounting grooves of the heteropolarity rubidium magnet 9, threaded holes are formed in the middle of the heteropolarity rubidium magnet 9 correspondingly, and the connecting plate 1 and the lower portion 202 are fixedly connected with the heteropolarity rubidium magnet 9 through bolts respectively.
In order to realize accurate regulation to the material temperature in the shower nozzle 7, temperature control device includes main control unit 10, drive unit 11, communication unit 12 and host computer, main control unit 10 includes the MCU chip, and main control unit 10 passes through communication unit 12 and connects the host computer, and main control unit 10 is according to host computer instruction control drive unit 11 output PWM signal regulation thermal resistance silk output.
Example 1:
In this embodiment, the MCU chip is an STC15W401 AS-type singlechip, the communication unit 12 is an RS232 serial port, the MCU chip and the RS232 serial port use UART serial port for communication, and the other end of the RS232 serial port is connected with an upper computer; the IO port of MCU chip is connected drive circuit 11, drive circuit 11 includes CH455-SOP16 type drive chip, drive chip and MCU chip pass through I2C serial ports and are connected.
The spray head 7 is connected with a pneumatic module of the printer;
the preparation method of the biological multifunctional bracket by 3D printing comprises the following steps:
Step one: and slicing the required stent model through a 3D biological printer to obtain two-dimensional information and generate a printing path.
Step two: the bio-printing material is loaded into the stock part of the head 7 and preheated.
Step three: and controlling the 3D printer to print the required biological multifunctional bracket by operating an upper computer connected with the 3D biological printer.
In the second step, the nozzle 7 is arranged in the guide pipe 4, the biological printing material is injected into the nozzle 7, then the nozzle 7 sequentially passes through the sealing plate 3, the guide pipe 4 and the fixed seat 2, the nozzle of the nozzle 7 is positioned outside the fixed seat 2, the large-diameter end of the storage part is buckled with the sealing plate 3, so that the nozzle 7 is fixed, the conductive cover plate 6 is buckled with the connecting plate 1, and the electrode of the conductive cover plate 6 is connected with the temperature control device and the thermal resistance wire shape to form a loop;
after the spray head 7 is installed, the spray head 7 is preheated, the proper temperature of the biological printing material is input through the upper computer, the MCU chip is enabled to adjust the temperature of the thermal resistance wire through the driving unit 11 after receiving the instruction, and the biological printing material in the storage part of the spray head 7 is preheated through the thermal resistance wire.
Example 2:
When the printing is finished and the related operations such as material supplementing and maintenance are carried out on the spray head 7, the disassembly operation is needed on the fixed seat 2 due to the small operation space in the printer;
firstly, the conductive cover plate 6 is separated from the connecting plate 1, then the fixed seat 2 is slid upwards, the upper part 201 is misplaced with the middle table surface of the connecting plate 1 due to the fact that the manual thrust overcomes the magnetic force of the heteropolarity rubidium magnet 9, and the fixed seat 2 is separated from the connecting plate 1;
finally, the spray head 7 is separated from the sealing plate 3, and the replacement operation of the spray head 7 is completed.
The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention, so that all equivalent changes or modifications of the structure, characteristics and principles described in the claims should be included in the scope of the present invention.
Claims (4)
1. The utility model provides a print shower nozzle for 3D biological printing, its characterized in that, including shower nozzle (7) and the heating mechanism of parcel shower nozzle (7) lateral surface, heating mechanism includes thermal resistance silk and pipe (4) are square cylinder, and circular column through-hole is seted up to the up end of pipe (4), follows the interior ring face of circular column through-hole sets up thermal resistance silk, the outside of pipe (4) is provided with fixing base (2), fixing base (2) are used for heating mechanism spacing, and the back of fixing base (2) is provided with connecting plate (1), be provided with heteropolarity rubidium magnet (9) between connecting plate (1) and fixing base (2), connecting plate (1) are fixed through heteropolarity rubidium magnet (9) actuation with fixing base (2);
The heat resistance wire is connected with a temperature control device, the temperature control device is used for setting temperature parameters of the heating mechanism, a conductive cover plate (6) is arranged between the temperature control device and the heat resistance wire, and the temperature control device and the heat resistance wire form a loop through being connected with the conductive cover plate (6);
The upper part of the fixed seat (2) is provided with a sealing plate (3), the sealing plate (3) is a square plate body, the middle part of the sealing plate (3) is provided with a circular columnar through hole corresponding to the guide pipe (4) and the fixed seat (2), a spray head (7) is arranged in the circular columnar through hole, the spray head (7) comprises a storage part and a spray nozzle, the storage part is of a hollow stepped cylindrical structure, the inside of the storage part is made of transparent materials, the large-diameter end of the storage part is buckled and fixed with the upper end face of the sealing plate (3), and the outer side face of the small-diameter end is attached to a thermal resistance wire;
the connecting plate (1) is a hollow convex plate body, and a temperature control device is arranged in the connecting plate (1);
The conductive cover plate (6) is of an inverted stepped quadrangular structure with an inwards concave upper end face, an electrode is arranged on the upper end face of the conductive cover plate (6), the lower end face of the conductive cover plate (6) is buckled and connected with the upper end face of the connecting plate (1), and the electrode of the conductive cover plate (6) is used for connecting a temperature control device and a thermal resistance wire to form a loop;
The middle table surface of the connecting plate (1) is a chamfer surface, and the upper end of the connecting plate (1) is connected with the upper end of the fixing seat (2) through mortise and tenon;
the fixing seat (2) comprises an upper portion (201) and a lower portion (202), the upper portion (201) is a square plate body, the lower end face of the upper portion (201) is a bevel face corresponding to the middle table face of the connecting plate (1), the lower end face of the upper portion (201) is attached to the middle table face of the connecting plate (1), and the side inner wall of the upper portion (201) is connected with the upper quadrangular of the connecting plate (1) in a sleeved mode;
the lower part (202) is of a square structure with open adjacent surfaces and hollow inside, and the lower part (202) and the upper part (201) are of an integrated structure.
2. The printing nozzle for 3D biological printing according to claim 1, wherein a U-shaped through hole is formed in one side of the guide pipe (4), an observation plate (5) is arranged corresponding to the U-shaped through hole, the observation plate (5) is a square plate body and is provided with a U-shaped window corresponding to the U-shaped through hole, the U-shaped window is provided with scales, the observation plate (5) is used for limiting the guide pipe (4), and the observation plate (5) is detachably connected with the fixing seat (2).
3. The printing nozzle for 3D bioprinting according to claim 1, wherein the connecting plate (1) is provided with a heteropolarity rubidium magnet (9) mounting groove corresponding to the lower part (202), and is fixedly connected with the heteropolarity rubidium magnet (9) through bolts.
4. The printing nozzle for 3D biological printing according to claim 1, wherein the temperature control device comprises a main control unit (10), a driving unit (11), a communication unit (12) and an upper computer, the main control unit (10) comprises an MCU chip, the main control unit (10) is connected with the upper computer through the communication unit (12), and the main control unit (10) controls the driving unit (11) to output PWM signals according to instructions of the upper computer to adjust output power of the thermal resistance wires.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011336881.6A CN112428580B (en) | 2020-11-25 | 2020-11-25 | Printing spray head for 3D biological printing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336881.6A CN112428580B (en) | 2020-11-25 | 2020-11-25 | Printing spray head for 3D biological printing |
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| CN112428580A CN112428580A (en) | 2021-03-02 |
| CN112428580B true CN112428580B (en) | 2024-06-07 |
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| CN113968024B (en) * | 2021-10-09 | 2022-08-23 | 中国科学院沈阳自动化研究所 | Accurate temperature control type biological 3D printing system |
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| Title |
|---|
| FDM型三轴并联桌面3D打印机研究;韩金龙;李方舟;;机械工程师;20160510(05) * |
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