CN112428580A - Printing nozzle for 3D biological printing - Google Patents
Printing nozzle for 3D biological printing Download PDFInfo
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- CN112428580A CN112428580A CN202011336881.6A CN202011336881A CN112428580A CN 112428580 A CN112428580 A CN 112428580A CN 202011336881 A CN202011336881 A CN 202011336881A CN 112428580 A CN112428580 A CN 112428580A
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- 238000007639 printing Methods 0.000 title claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 229910052701 rubidium Inorganic materials 0.000 claims abstract description 19
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004891 communication Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000010146 3D printing Methods 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Classifications
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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
本发明涉及一种用于3D生物打印的打印喷头，包括喷头及包裹喷头外侧面的加热机构，加热机构包括热阻丝和导管、导管的上端面开设圆形柱状通孔，沿圆形柱状通孔的内环面设置热阻丝，导管的外部设置有固定座，固定座用于加热机构限位，固定座的背部设置有连接板，连接板与固定座通过异极性铷磁铁吸合固定；热阻丝连接有温控装置，温控装置用于设定加热机构温度参数，温控装置与热阻丝之间设置有导电盖板，温控装置与热阻丝通过连接导电盖板形成回路。本发明设置有用于包裹喷头的加热机构，配合温控装置实现打印材料精确预热控制；同时设置有用于保护喷头的固定座及与打印机固定的连接板，连接板与固定座吸合连接，便于安装及维护。
The invention relates to a printing nozzle for 3D bioprinting, comprising a nozzle and a heating mechanism wrapping the outer surface of the nozzle. The inner ring surface of the hole is provided with a heat resistance wire, the outside of the conduit is provided with a fixing seat, the fixing seat is used to limit the position of the heating mechanism, the back of the fixing seat is provided with a connecting plate, and the connecting plate and the fixing seat are attracted and fixed by different polarity rubidium magnets The thermal resistance wire is connected with a temperature control device, the temperature control device is used to set the temperature parameters 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 are formed by connecting the conductive cover plate loop. The present invention is provided with a heating mechanism for wrapping the print head, and cooperates with the temperature control device to realize the precise preheating control of the printing material; at the same time, a fixed seat for protecting the print head and a connecting plate fixed with the printer are provided, and the connecting plate is connected with the fixed seat by suction, which is convenient for installation and maintenance.
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, which is to perform three-dimensional design by computer software modeling, then perform slicing processing, and finally construct an object by using bondable materials such as powdered metal, plastic, polymer and the like in a layer-by-layer printing mode. The current 3D printing technology mainly includes an inkjet printing technology, a pressure-assisted technology, a laser-assisted technology, and a stereolithography technology. Among these, the materials used for printing by pressure-assisted techniques are generally liquids or dispersions, mostly formed into continuous filaments by gas pressure coordinated extrusion motion through micro-scale nozzles or micro-holes fixed on a substrate.
The 3D printing nozzle is used as a core object of the pneumatic 3D printer, and the printing quality is determined to a great extent. The smoothness of the extruded filaments and the temperature of the extruded filaments directly affect the precision of 3D printing. At this stage, the temperature required for printing is usually that the solution or dispersion is initially heated and wrapped with a hot towel to prevent heat dissipation. However, this results in an uncontrolled printing temperature, which causes a slight difference between the printed filaments before and after printing. For printing solutions, the bubbles in the solution largely determine the continuity of the filaments. In the past, solutions are all arranged in a sealed metal container, and whether bubbles are generated or not is unknown in the printing process.
Patent document CN201910555564.4 entitled "a 3D print head" discloses a print head which has an effect of heating a material, but the heating effect is not controllable, and the printing quality cannot be ensured.
In addition, the printing head is a vulnerable part and needs to be frequently replaced and maintained, but the 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, aiming at solving 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, wherein the printing nozzle is provided with a heating mechanism for wrapping the nozzle and is matched with a temperature control device to realize accurate preheating control of the printing materials; meanwhile, the fixing seat used for protecting the spray head and the connecting plate fixed with the printer are arranged, and the connecting plate is connected with the fixing seat in an attracting mode, so that the installation and maintenance are convenient.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a printing nozzle for 3D biological printing comprises a nozzle and a heating mechanism wrapping the outer side face of the nozzle, wherein the heating mechanism comprises a thermal resistance wire and a guide pipe, the guide pipe is a square cylinder, a round columnar through hole is formed in the upper end face of the guide pipe, the thermal resistance wire is arranged along the inner ring face of the round columnar through hole, a fixed seat is arranged outside the guide pipe and used for limiting the heating mechanism, a connecting plate is arranged at the back of the fixed seat, a rubidium magnet with different polarity is arranged between the connecting plate and the fixed seat, and the connecting plate and the fixed seat are attracted and fixed through the rubidium magnet with different polarity;
the heating 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 heating resistance wire, and the temperature control device and the heating resistance wire form a loop through being connected with the conductive cover plate.
Further, a U-shaped through hole is formed in one side of the guide pipe, an observation plate is arranged corresponding to the U-shaped through hole, the observation plate 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 is used for limiting the guide pipe, and the observation plate is 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 circular column through-hole is seted up to corresponding pipe and fixing base in the middle part of shrouding, the inside shower nozzle that is provided with of circular column through-hole, the shower nozzle includes storage portion and nozzle, the hollow ladder cylindric structure in inside that storage portion was made for transparent material, the big footpath end of storage portion and the up end lock of shrouding are fixed, the lateral surface and the hot resistance silk laminating of path end.
Furthermore, 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 the upper end surface being concave, an electrode is arranged on the upper end surface of the conductive cover plate, the lower end surface of the conductive cover plate is connected with the upper end surface of the connecting plate in a buckling manner, and the electrode of the conductive cover plate is used for connecting the temperature control device and the hot resistance wire to form a loop;
the middle table-board of the connecting plate is a bevel plane, and the upper end of the connecting plate is in mortise and tenon connection with the upper end of the fixing seat.
Furthermore, the fixed seat comprises an upper part and a lower part, the upper part is a square plate body, the lower end surface of the upper part is a diagonal plane corresponding to the middle table surface of the connecting plate, the lower end surface 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 opening on the adjacent surface and a hollow interior, and the lower part and the upper part are of an integrated structure.
Furthermore, the connecting plate and the lower part are correspondingly provided with heteropolar rubidium magnet mounting grooves, the middle part of the heteropolar rubidium magnet is provided with a threaded hole, and the connecting plate and the lower part are respectively fixedly connected with the heteropolar rubidium magnet through bolts.
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 according to instructions of the upper computer to adjust the output power of the thermal resistance wire.
Through the technical scheme, the invention has the beneficial effects that:
1. the heating mechanism comprises a thermal resistance wire and a guide pipe, wherein the guide pipe is a square cylinder, a round columnar through hole is formed in the upper end face of the guide pipe, the thermal resistance wire is arranged along the inner annular face of the round columnar through hole, the thermal 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 thermal resistance wire, and the temperature control device and the thermal resistance wire form a loop by being connected with the conductive cover plate.
During the use, through the temperature parameter of host computer control temperature control device regulation heating mechanism, make the printing material temperature in the current shower nozzle be in suitable state to avoid printing in-process shower nozzle to extrude the silk and take place the diameter and vary and fracture scheduling problem, guaranteed printing quality.
2. A fixed seat is arranged outside the guide pipe and used for limiting the heating mechanism, a connecting plate is arranged at the back of the fixed seat, a rubidium magnet with different polarity is arranged between the connecting plate and the fixed seat, and the connecting plate and the fixed seat are attracted and fixed through the rubidium magnet with different polarity;
one end of the connecting plate is fixed with the printer, the other end of the connecting plate is attracted with the fixed seat, the fixed seat is modularized, when the sprayer is replaced or maintained, the connecting plate and the fixed seat are convenient to disassemble, the conductive cover plate is firstly taken down to enable the thermal resistance wire to be powered off, then the fixed seat and the sprayer are taken down from the printer to carry out related maintenance operation, and therefore damage to the printer or the sprayer caused by rigid disassembly on the printer is avoided.
Drawings
Fig. 1 is one of the schematic structural diagrams of a printing nozzle for 3D bio-printing.
Fig. 2 is a second schematic structural diagram of a printing nozzle for 3D bio-printing.
Fig. 3 is a third schematic structural diagram of a printing nozzle for 3D bio-printing.
Fig. 4 is a fourth schematic structural diagram of a printing nozzle for 3D bio-printing.
Fig. 5 is a fifth schematic structural diagram of a printing nozzle for 3D bio-printing.
Fig. 6 is a sixth schematic structural view of a printing head for 3D bio-printing.
Fig. 7 is a system diagram of a print head for 3D bioprinting.
The reference numbers in the drawings are as follows: the device comprises a connecting plate 1, a fixing seat 2, a sealing plate 3, a guide pipe 4, an observation plate 5, a conductive cover plate 6, a spray head 7, a heteropolar rubidium magnet 9, a main control unit 10, a driving unit 11, a communication unit 12, an upper portion 201 and a lower portion 202.
In a particular embodiment, the method comprises the following steps,
the invention is further described with reference to the following figures and detailed description:
as shown in fig. 1 to 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 thermal resistance wire and a conduit 4, the conduit 4 is a square cylinder, a circular cylindrical through hole is formed in the upper end surface of the conduit 4, the thermal resistance wire is arranged along the inner annular 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 rubidium magnet 9 with different polarity 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 attracting the rubidium magnet 9 with different polarity;
the heating 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 heating resistance wire, and the temperature control device and the heating resistance wire form a loop by being connected with the conductive cover plate 6.
For optimizing product structure, be convenient for observe material state in the pipe 4, the U-shaped through-hole has been seted up to one side of pipe 4, corresponds the U-shaped through-hole is provided with observation board 5, observation board 5 is square plate body, and corresponds the 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 be dismantled with fixing base 2 and be connected.
For avoiding 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 corresponding pipe 4 and fixing base 2 in the middle part of shrouding 3, the inside shower nozzle 7 that is provided with of circular column through-hole, shower nozzle 7 includes storage portion and nozzle, the hollow ladder cylindric structure in inside that storage portion was made for transparent material, the big footpath end of storage portion and the up end lock of shrouding 3 are fixed, the lateral surface and the hot 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 inside the connecting plate 1; the conductive cover plate 6 is 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 connected with the upper end face of the connecting plate 1 in a buckling mode, and the electrode of the conductive cover plate 6 is used for connecting a temperature control device and a hot resistance wire to form a loop;
the middle table-board of connecting plate 1 is the scarf, and the upper end of connecting plate 1 and the upper end mortise-tenon joint of fixing base 2.
In order to facilitate the installation and the disassembly of the spray head 7 and the printer, the fixed seat 2 comprises an upper part 201 and a lower part 202, the upper part 201 is a square-back plate body, the lower end face of the upper part 201 corresponds to the middle table-board of the connecting plate 1 and is a beveled surface, the lower end face of the upper part 201 is attached to the middle table-board 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 an open adjacent surface and a hollow interior, and the lower part 202 and the upper part 201 are integrated. The connecting plate 1 and the lower part 202 are correspondingly provided with different-polarity rubidium magnet 9 mounting grooves, the middle parts of the different-polarity rubidium magnets 9 are provided with threaded holes, and the connecting plate 1 and the lower part 202 are respectively fixedly connected with the different-polarity rubidium magnets 9 through bolts.
In order to realize accurate adjustment of the temperature of the material in the nozzle 7, the temperature control device comprises a main control unit 10, a driving unit 11, a communication unit 12 and an upper computer, wherein 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 the output power of the thermal resistance wire.
Example 1:
in this embodiment, the MCU chip is an STC15W401AS type single chip microcomputer, the communication unit 12 is an RS232 serial port, the MCU chip and the RS232 serial port communicate with each other using a UART serial port, and the other end of the RS232 serial port is connected to an upper computer; the IO port of the MCU chip is connected with a driving circuit 11, the driving circuit 11 comprises a CH455-SOP16 type driving chip, and the driving chip is connected with the MCU chip through an I2C serial port.
The spray head 7 is connected with a pneumatic module of the printer;
the method for preparing the biological multifunctional scaffold by 3D printing comprises the following steps:
the method comprises the following steps: and slicing the required support model through a 3D biological printer to obtain two-dimensional information and generate a printing path.
Step two: the bio-printing material is charged into the stock portion of the head 7 and preheated.
Step three: the upper computer connected with the 3D biological printer is used for controlling the 3D printer to print the required biological multifunctional support.
When the second step is carried out, 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 penetrates 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 material storage part is buckled with the sealing plate 3, so that the nozzle 7 is fixed, then the conductive cover plate 6 is buckled with the connecting plate 1, and the electrode of the conductive cover plate 6 is communicated with the temperature control device and forms a loop with a thermal resistance wire;
after 7 installations of shower nozzle are accomplished, preheat shower nozzle 7, through the suitable temperature of host computer input biological printing material, the MCU chip receives the order after to make it adjust thermal resistance silk temperature through drive unit 11, preheats the biological printing material in 7 storage portions of shower nozzle through the thermal resistance silk.
Example 2:
after printing is finished, when relevant operations such as material supplement or maintenance are carried out on the spray head 7, due to the fact that the operating space in the printer is small, the fixed seat 2 needs to be disassembled;
firstly, separating the conductive cover plate 6 from the connecting plate 1, then sliding the fixed seat 2 upwards, wherein the upper part 201 is staggered with the middle table-board of the connecting plate 1 due to the fact that the manual thrust overcomes the magnetic force of the heteropolar rubidium magnet 9, and the fixed seat 2 is separated from the connecting plate 1;
and finally, separating the spray head 7 from the sealing plate 3 to complete the replacement operation of the spray head 7.
The above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the invention, so that equivalent changes or modifications in the structure, features and principles described in the present invention should be included in the claims of the present invention.
Claims (7)
1. The printing nozzle for 3D biological printing is characterized by comprising a nozzle (7) and a heating mechanism wrapping the outer side surface of the nozzle (7), wherein the heating mechanism comprises a thermal resistance wire and a conduit (4), the conduit (4) is a square cylinder, a round columnar through hole is formed in the upper end surface of the conduit (4), the thermal resistance wire is arranged along the inner annular surface of the round columnar 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 rubidium magnet (9) with different polarity is arranged between the connecting plate (1) and the fixing seat (2), and the connecting plate (1) and the fixing seat (2) are fixed through the rubidium magnet (9) with different polarity in an attracting mode;
the heating 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 heating resistance wire, and the temperature control device and the heating resistance wire form a loop by being connected with the conductive cover plate (6).
2. The printing nozzle for 3D bioprinting according to claim 1, wherein a U-shaped through hole is formed in one side of the guide tube (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 tube (4), and the observation plate (5) is detachably connected with the fixing base (2).
3. The printing nozzle for 3D bioprinting according to claim 1, wherein the upper portion of the fixing seat (2) is provided with a sealing plate (3), the sealing plate (3) is a square plate body, a circular cylindrical through hole is formed in the middle of the sealing plate (3) corresponding to the guide pipe (4) and the fixing seat (2), a nozzle (7) is arranged inside the circular cylindrical through hole, the nozzle (7) comprises a storage part and a nozzle, the storage part is of a hollow stepped cylindrical structure inside and made of a transparent material, the large-diameter end of the storage part is fixedly buckled with the upper end face of the sealing plate (3), and the outer side face of the small-diameter end is attached to the thermal resistance wire.
4. The printing nozzle for 3D bio-printing according to claim 1, wherein the connecting plate (1) is a hollow convex plate body, and a temperature control device is arranged inside the connecting plate (1);
the conductive cover plate (6) is of an inverted stepped quadrangular prism structure with the upper end surface being concave, an electrode is arranged on the upper end surface of the conductive cover plate (6), the lower end surface of the conductive cover plate (6) is connected with the upper end surface of the connecting plate (1) in a buckling manner, and the electrode of the conductive cover plate (6) is used for connecting a temperature control device and a hot wire to form a loop;
the middle table-board of the connecting plate (1) is a bevel plane, and the upper end of the connecting plate (1) is in mortise and tenon connection with the upper end of the fixed seat (2).
5. The printing nozzle for 3D bioprinting according to any one of claims 2 and 4, wherein the fixing seat (2) comprises an upper part (201) and a lower part (202), the upper part (201) is a rectangular plate body, the lower end surface of the upper part (201) corresponds to the middle table surface of the connecting plate (1) and is a chamfered surface, 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 connected with the upper quadrangular prism of the connecting plate (1) in a sleeved mode;
the lower part (202) is a square structure with an open adjacent surface and a hollow interior, and the lower part (202) and the upper part (201) are of an integrated structure.
6. The printing nozzle for 3D bioprinting according to claim 5, wherein the connecting plate (1) is provided with installing grooves for the rubidium magnet with different polarity (9) corresponding to the lower part (202), and is fixedly connected with the rubidium magnet with different polarity (9) through bolts.
7. The printing nozzle for 3D bioprinting 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 a PWM signal according to an instruction of the upper computer to adjust the output power of the thermal resistance wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336881.6A CN112428580B (en) | 2020-11-25 | 2020-11-25 | Printing spray head for 3D biological printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336881.6A CN112428580B (en) | 2020-11-25 | 2020-11-25 | Printing spray head for 3D biological printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112428580A true CN112428580A (en) | 2021-03-02 |
| CN112428580B CN112428580B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011336881.6A Active CN112428580B (en) | 2020-11-25 | 2020-11-25 | Printing spray head for 3D biological printing |
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