CN116353047B - Biological 3D prints crowded silk module with dual drive - Google Patents
Biological 3D prints crowded silk module with dual drive Download PDFInfo
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- CN116353047B CN116353047B CN202310384796.4A CN202310384796A CN116353047B CN 116353047 B CN116353047 B CN 116353047B CN 202310384796 A CN202310384796 A CN 202310384796A CN 116353047 B CN116353047 B CN 116353047B
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- 230000009977 dual effect Effects 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 153
- 238000001125 extrusion Methods 0.000 claims abstract description 144
- 238000010438 heat treatment Methods 0.000 claims abstract description 108
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 238000010146 3D printing Methods 0.000 claims abstract description 20
- 238000004321 preservation Methods 0.000 claims description 77
- 238000001816 cooling Methods 0.000 claims description 55
- 239000004065 semiconductor Substances 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 18
- 210000001503 joint Anatomy 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000007639 printing Methods 0.000 abstract description 47
- 239000007921 spray Substances 0.000 abstract description 16
- 230000001105 regulatory effect Effects 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 description 13
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 9
- 238000005057 refrigeration Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000012620 biological material Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004113 cell culture Methods 0.000 description 1
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- 230000008878 coupling Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
-
- 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
-
- 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
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
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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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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)
- Coating Apparatus (AREA)
Abstract
A biological 3D printing filament extrusion module with double driving belongs to the technical field of 3D printers. The invention aims to solve the problems that the high-temperature spray head and the wire extrusion drive of the traditional biological 3D printer adopt an integrated structure, only can adopt a fixed spray head and single material for printing, and the optimal wire extrusion mode can not be selected during printing; the heating system cannot be regulated and controlled with the extrusion force in a closed loop, so that the printing quality of the workpiece is reduced; the device comprises a base, a push rod driving mechanism, a push rod wire extrusion nozzle, a pneumatic driving mechanism and a pneumatic wire extrusion nozzle, wherein the push rod driving mechanism and the pneumatic driving mechanism are respectively arranged at two ends of the base in the length direction, and the push rod wire extrusion nozzle or the pneumatic wire extrusion nozzle is detachably arranged at one end, close to the pneumatic driving mechanism, of the base; the push rod driving mechanism is used for extruding wires of the push rod wire extrusion nozzle, and the pneumatic driving mechanism is used for extruding wires of the pneumatic wire extrusion nozzle. The method is mainly used for 3D printing.
Description
Technical Field
The invention belongs to the technical field of 3D printers, and particularly relates to a biological 3D printing silk extrusion module with double driving.
Background
The biological 3D printing is a rapid molding technology for manufacturing biomedical products such as artificial implantation stents, tissue organs, medical aids and the like by positioning and assembling biological materials through a software layered discrete and numerical control molding method based on a three-dimensional model designed according to the requirement. Biological 3D printing is one of application fields with development potential in the rapid prototyping technology, has the characteristics of rapidness, accuracy, individuation, differentiation and being particularly suitable for manufacturing complex-shaped entities, so that 3D printing can be combined with biological materials, cell culture, medical imaging and software auxiliary technologies, and medical products such as artificial implantation stents, tissues and organs, medical auxiliary tools and the like are designed and manufactured according to specific anatomy, physiological functions and treatment requirements of patients, so that a breakthrough treatment new technology is provided for individuation and precise medical treatment.
The existing biological 3D printing filament extrusion module has the following problems:
firstly, biological 3D printer includes extrusion shower nozzle and extrusion drive to divide with different driving methods, can divide into two kinds to direct-writing type printing mode: one is electric extrusion type direct-writing type printing in which a screw rod drives a push rod to extrude a material in a spray head; the other is direct-writing printing in which extrusion is performed by using air pressure as a drive. Regardless of the mode, the printer is designed with the printing nozzle and the extrusion module in an integrated manner, can not be quickly disassembled, can only use a single nozzle and materials for printing, is inconvenient to maintain when the parts are damaged, and has the advantages of high maintenance cost and quite unfavorable development of the biological 3D printer when the whole parts are required to be replaced seriously. In addition, each biological 3D printing wire extrusion module has only one wire extrusion mode, and different wire extrusion modes have advantages and disadvantages, and the optimal wire extrusion mode cannot be selected during printing, so that the printer has great limitation.
Secondly, the heating part of the current biological 3D printer only adopts a group of base sleeves and heating rods for temperature control heating, so that the heating speed is low and the effect is poor; because the melting temperature of different materials is different and the temperature of the printing chamber is also different, the heating temperature of the spray head cannot be changed, so that the materials are difficult to reach the optimal printing state.
Thirdly, the current wire extrusion nozzle is in open loop control, namely whether the material body is really completely melted or not, extrusion starts as long as the temperature sensor reaches a specified value, and at the moment, the material is probably not completely melted or the material with the too high heating temperature is not in the optimal printing state, so that the printing quality is greatly reduced.
Fourth, because the printing material that high temperature 3D printed corresponds is thermoplastic polymer, and it is the viscosity state liquid that viscosity is high under the molten state, is comparatively hard solid again after the cooling, adopts traditional integral type storage bucket can make after printing to the clearance work of storage bucket very difficult, can only use the washing method to clear up the storage bucket, and the storage bucket after this kind of clearance still has the material residual.
Fifthly, the existing 3D printer can only singly realize high-temperature wire extrusion or low-temperature wire extrusion, but can not realize switching of two modes, so that printing nozzles in different modes are required to be manufactured for replacement, and printing cost is increased.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the existing biological 3D printer nozzle and the extruding wire drive adopt an integrated structure, only the fixed nozzle and the single material can be used for printing, and the optimal extruding wire mode can not be selected during printing; the temperature regulating system cannot be regulated and controlled with the extrusion force in a closed loop, so that the printing quality of the workpiece is reduced; and further provides a biological 3D printing silk extrusion module with double driving.
The invention adopts the technical scheme for solving the technical problems that:
the biological 3D printing silk extrusion module with double driving comprises a base, a push rod driving mechanism, a push rod silk extrusion nozzle, a pneumatic driving mechanism and a pneumatic silk extrusion nozzle, wherein the push rod driving mechanism and the pneumatic driving mechanism are respectively arranged at two ends of the base in the length direction, and the push rod silk extrusion nozzle or the pneumatic silk extrusion nozzle is detachably arranged at one end, close to the pneumatic driving mechanism, of the base; the push rod driving mechanism is used for pushing the silk extrusion of the push rod silk extrusion nozzle, and the pneumatic driving mechanism is used for extruding the silk of the pneumatic silk extrusion nozzle.
Further, the push rod driving mechanism comprises a motor, a motor seat, a coupler, a screw rod nut, a slide rail and a slide block; the motor is arranged at one end of the base through the motor seat, the sliding rail is arranged on the base and is positioned at one side of the motor seat, and the sliding direction of the sliding rail is the same as the length direction of the base; the output end of the motor is fixedly connected with one end of the screw rod through a coupler, and the screw rod nut is in threaded connection with the screw rod and is in sliding connection with the sliding rail through a sliding block.
Further, the push rod silk extrusion nozzle comprises a supporting seat I, a heat preservation shell I, a heating base sleeve I, a material barrel I, an extrusion connecting piece, a piston rod, a piston, a needle head connecting piece I, a needle head I and a cooling component; the support seat I and the heat preservation shell I are coaxially and sequentially sleeved outside the heating base sleeve I, and the cooling assembly is arranged between the heat preservation shell I and the heating base sleeve I; the supporting seat I is detachably arranged on the base, the needle head I, the needle head connecting piece I and the material barrel I are coaxially and sequentially arranged in the heating base sleeve I, the needle head I extends out of one end port of the heating base sleeve I, and the material barrel I extends out of the other end port of the heating base sleeve I; the axial direction of the material barrel I is consistent with the sliding direction of the sliding rail; the piston is arranged in the material barrel I and is in sliding connection with the material barrel I; one end of the piston rod extends into the material barrel I and is fixedly connected with the piston, and the other end of the piston rod is fixedly connected with the screw nut through the extrusion connecting piece.
Further, the heating base sleeve I comprises a straight cylinder heat preservation sleeve I, a cone cylinder heat preservation sleeve I and a needle head heat preservation sleeve, wherein the straight cylinder heat preservation sleeve I is sleeved outside the connecting part of the material barrel I and the needle head connecting piece I, the cone cylinder heat preservation sleeve I is sleeved outside the connecting part of the needle head connecting piece I and the needle head I, and the needle head heat preservation sleeve is sleeved outside the needle head I; the heating rod I in the straight cylinder heat preservation sleeve I is positioned at the joint of the material barrel I and the needle head connecting piece I, and the heating rod I in the taper cylinder heat preservation sleeve I is positioned at the position of the needle head connecting piece I; the temperature sensor I is arranged at the position between the heating rod I and the needle head connecting piece I in the cone cylinder heat preservation sleeve I and is used for monitoring the temperature of materials in real time.
Further, the extrusion connecting piece is L-shaped, the horizontal connecting part of the extrusion connecting piece is arranged on the screw nut, the vertical connecting part of the extrusion connecting piece is arranged at the end part of the piston rod through the anti-falling knob, and the vertical connecting part of the extrusion connecting piece and the anti-falling knob can axially move; and a stress sensor is sleeved between the vertical connecting part of the extrusion connecting piece and the piston rod on the anti-falling knob.
Further, the pneumatic driving mechanism comprises a quick adapter plate and an air pipe joint, wherein an air inlet through hole I penetrating through the upper surface and the lower surface is formed in the base, an air inlet through hole II is formed in the quick adapter plate, the quick adapter plate is arranged on the lower surface of the tail of the base, the air inlet through hole II on the quick adapter plate is communicated with the air inlet through hole I on the base, and the air pipe joint is arranged at the air inlet end of the air inlet through hole II on the quick adapter plate and provides power for pneumatic wire extrusion.
Further, the pneumatic silk extrusion nozzle comprises a pneumatic connecting plate, a heat insulation shell II, a heating base sleeve II, a pneumatic adapter, a material barrel II, a needle head connecting piece II, a needle head II and a cooling assembly; the pneumatic connecting plate is L-shaped, an air inlet through hole III is formed in the horizontal part of the pneumatic connecting plate, and a central mounting hole is formed in the vertical part of the pneumatic connecting plate; the horizontal part of the pneumatic connecting plate is arranged on the upper surface of the base, and an air inlet through hole III on the pneumatic connecting plate is communicated with an air inlet through hole I on the base; one end of the heating base sleeve II is inserted into a central mounting hole on the vertical part of the pneumatic connecting plate; the heat-insulating shell II is sleeved outside the heating base sleeve II and fixedly arranged on the vertical part of the pneumatic connecting plate, and the cooling assembly is arranged between the heat-insulating shell II and the heating base sleeve II; the needle II, the needle connecting piece II and the material barrel II are sequentially and coaxially inserted into the heating base sleeve II; the pneumatic adapter is respectively inserted into the horizontal part of the pneumatic connecting plate at the port of the feeding end of the material barrel II, so that the air inlet through hole III on the pneumatic connecting plate is communicated with the inner cavity of the material barrel II.
Further, the heating base sleeve II comprises a straight cylinder heat preservation sleeve II, a cone cylinder heat preservation sleeve II and a needle tip heat preservation sleeve, wherein the straight cylinder heat preservation sleeve II is sleeved outside a material barrel II and the joint of the material barrel II and a needle head connecting piece II, the cone cylinder heat preservation sleeve II is sleeved outside the needle head connecting piece II and the joint of the needle head connecting piece II and the needle head II, and the needle tip heat preservation sleeve is sleeved outside the needle head II; a heating rod II is arranged in the straight cylinder heat preservation sleeve II and the conical cylinder heat preservation sleeve II respectively, the heating rod II in the straight cylinder heat preservation sleeve II is positioned at the joint of the material barrel II and the needle head connecting piece II, and the heating rod II in the conical cylinder heat preservation sleeve II is positioned at the position of the needle head connecting piece II; a temperature sensor II is also arranged in the cone cylinder heat preservation sleeve II and at a position between the heating rod II and the needle head connecting piece II; the pneumatic adapter is provided with three communicated air pipes, one air pipe is connected to the pneumatic connecting plate, the second air pipe is connected to the material barrel II, and a pressure sensor is arranged in the third air pipe.
Further, a Pogo pin female seat is arranged on the upper end face of the base, a Pogo pin male seat is arranged on the lower end face of the supporting seat I, and the Pogo pin male seat on the supporting seat I is in butt joint with the Pogo pin female seat on the base through an interface; the lower end face of the pneumatic connecting plate is provided with a male Pogo pin seat, and the male Pogo pin seat on the pneumatic connecting plate is in butt joint with the female Pogo pin seat on the base through an interface.
Further, the cooling assembly comprises a semiconductor refrigerating sheet and a heat dissipation plate, the semiconductor refrigerating sheet is respectively arranged on the upper surface and the lower surface of the heat dissipation plate, the semiconductor refrigerating sheet positioned on the upper surface of the heat dissipation plate is contacted with the outer surface of the heating base sleeve, and the semiconductor refrigerating sheet positioned on the lower surface of the heat dissipation plate is contacted with the inner wall of the heat preservation shell; the cooling medium cooling device is characterized in that two flow channels are formed in the quick adapter plate, a connecting joint is connected to a port of each flow channel on the quick adapter plate, one flow channel on the quick adapter plate is connected with an inlet of the flow channel in the cooling plate through a quick connector, the other flow channel on the quick adapter plate is connected with an outlet of the flow channel in the cooling plate through a quick connector, and the flow channels in the cooling plate and the two flow channels on the quick adapter plate form a cooling medium circulation channel.
Compared with the prior art, the invention has the beneficial effects that:
1. the 3D printer integrates two extrusion driving modes of electric and pneumatic, the extrusion nozzle opposite to the electric extrusion driving mode is of a separated structure, the extrusion nozzle opposite to the pneumatic extrusion driving mode is of a separated structure, and the two extrusion nozzles and the base are detachably mounted, so that the two extrusion modes are realized by changing different extrusion nozzles, and the applicability of the printer is greatly improved. Meanwhile, the invention can use various printing spray heads, can be quickly disassembled and assembled, is convenient to maintain, can even directly replace new spray heads, and has short maintenance period and low cost.
2. The invention adopts an integral three-layer temperature control structure, and comprises a heat preservation shell, a heating base sleeve, a cooling assembly and a material barrel from outside to inside, wherein the material barrel, a needle head connecting piece and materials in the needle head are integrally heated by two stages of heating rods which are axially arranged, the heating area is large, the heating speed is high and the effect is uniform; the cooling assembly plays a role in refrigeration through the semiconductor refrigeration sheet, the heat conducted by the semiconductor refrigeration sheet is taken away by the heat dissipation plate, and the temperature is controlled under the synergistic effect of the heating base sleeve and the cooling assembly; the heat insulation layer adopts a heat insulation tape to play a role in protection; the inner material barrel has biocompatibility, is detachable and replaceable, and has good heat conducting performance.
3. Since the molten state of the material determines the quality of the 3D printing forming technology, the extruding pressure of the nozzle is changed along with the change of the state, and the temperature determines the molten state of the material, the actual printing temperature of the 3D printer plays a key role in the printing quality; according to the invention, the initial temperature of the 3D printer is preset according to the material characteristics, but a temperature sensor in the 3D printer has measurement errors, and the actual printing temperature of the 3D printer is inconsistent with the preset initial temperature under different printing working conditions, so that the material cannot be in an optimal melting state, and the printing quality is poor; according to the invention, the temperature of the material barrel is regulated and controlled in advance by using the heating base sleeve and the cooling component, so that the material is melted, meanwhile, the material is extruded by using the extrusion module, the system of the 3D printer is based on the temperature value of the material barrel measured by the temperature sensor and the material extrusion pressure measured by the pressure sensor, a relation curve between the material extrusion pressure and the heating temperature of the material is established in real time, the temperature corresponding to the pressure in the optimal melting state obtained based on the curve is regulated and controlled in real time by using the heating base sleeve and the cooling component, closed-loop control is realized, the material is not limited and influenced by the actual working conditions such as the ambient temperature, and the optimal melting state of the material is always kept and printing is performed.
4. In the invention, the Pogo Pin connector is used as an electric connector and also used as a nozzle identification position, different printing nozzles are automatically distinguished by different connection modes of Pogo Pin public seats in different filament extrusion nozzles, and corresponding driving programs are selected; compared with the traditional spray head circuit, the spray head circuit is directly connected with the control circuit through a wire, and has the functions of quick assembly disassembly and automatic spray head type identification.
5. According to the invention, the material barrel, the needle head connecting piece and the needle head adopt a split structure, so that the disassembly and the cleaning are convenient.
6. Each filament extrusion nozzle can be switched into different temperature regulation modes according to different printing materials so as to realize high-temperature filament extrusion or low-temperature filament extrusion; after the high-temperature wire extrusion mode or the low-temperature wire extrusion mode is started, the temperature can be regulated and controlled repeatedly through feedback measured by the heating base sleeve, the cooling component and the temperature sensor, so that the aim of accurately controlling the temperature is fulfilled; after the high-temperature wire extrusion mode is finished, the cooling group can be used for rapidly cooling, so that the spray head can be rapidly replaced, and scalding is prevented.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this application.
Fig. 1 is an electrical extrusion partial cross-sectional view of a bio-3D printing high temperature filament extrusion module.
Fig. 2 is an electro-extrusion top view of a biological 3D printing high temperature filament extrusion module.
Fig. 3 is a partial sectional view of a pneumatic extrusion type of a biological 3D printing high temperature wire extrusion module.
Fig. 4 is a pneumatic extrusion top view of a biological 3D printing high temperature filament extrusion module.
Fig. 5 is a partial enlarged view at a in fig. 1.
Fig. 6 is a partial enlarged view at B in fig. 3.
Fig. 7 is a partial enlarged view at C in fig. 3.
Fig. 8 is a cross-sectional view of the pneumatic connecting plate.
Reference numerals illustrate: 100-a push rod driving mechanism; 200-a push rod silk extrusion nozzle; 300-pneumatic drive mechanism; 400-pneumatic wire extrusion nozzle; 1-a base; 1-1-an air inlet through hole I; 2-an electric motor; 3-a motor base; a 4-coupling; 5-a screw rod; 6-a lead screw nut; 7-sliding rails; 8-a sliding block; 9-a supporting seat I; 10-a heat preservation shell I; 11-heating the base sleeve I; 11-1-a straight cylinder insulation sleeve I; 11-2-cone insulation sleeve I; 11-3-heating rod I; 11-4-temperature sensor I; 12-a material barrel I; 13-pressing the connector; 14-a piston rod; 15-a piston; 16-needle connector I; 17-needle I; 18-an anti-falling knob; 19-stress sensor; 20-Pogo pin male socket; 21-Pogo pin female socket; 22-limit sensors; 23-sensing a metal sheet; 24-a quick adapter plate; 24-1-an air inlet through hole II; 25-tracheal tube connection; 26-a pneumatic connecting plate; 26-1-an air inlet through hole III; 26-2-center mounting hole; 27-a heat-insulating shell II; 28-heating the base sleeve II; 28-1-a straight cylinder heat preservation sleeve II; 28-2-cone insulation sleeve II; 28-4-heating rod II; 28-5-temperature sensor II; 29-pneumatic adapter; 29-1-trachea; 30-a material barrel II; 31-needle connector II; 32-needle II; 33-a pressure sensor; 34-cooling the cooling assembly; 34-1-semiconductor refrigerating sheets; 34-2-cooling plate; 35-quick connector; 36-connection joint.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
Referring to fig. 1 and 3, the embodiment of the present application provides a bio-3D printing filament extrusion module with dual driving, which includes a base 1, a push rod driving mechanism 100, a push rod filament extrusion nozzle 200, a pneumatic driving mechanism 300 and a pneumatic filament extrusion nozzle 400, wherein the push rod driving mechanism 100 and the pneumatic driving mechanism 300 are respectively installed at two ends of the base 1 in the length direction, and the push rod filament extrusion nozzle 200 or the pneumatic filament extrusion nozzle 400 is detachably installed at one end of the base 1 close to the pneumatic driving mechanism 300; the push rod driving mechanism 100 is used for extruding wires through the push rod wire extruding nozzle 200, and the pneumatic driving mechanism 300 is used for extruding wires through the pneumatic wire extruding nozzle 400.
Referring to fig. 1, the push rod driving mechanism 100 includes a motor 2, a motor base 3, a coupling 4, a screw 5, a screw nut 6, a slide rail 7 and a slide block 8; the motor 2 is arranged at one end of the base 1 through the motor seat 3, the sliding rail 7 is arranged on the base 1 and is positioned at one side of the motor seat 3, and the sliding direction of the sliding rail 7 is the same as the length direction of the base 1; the output end of the motor 2 is fixedly connected with one end of a screw rod 5 through a coupler 4, and the screw rod nut 6 is in threaded connection with the screw rod 5 and is in sliding connection with a sliding rail 7 through a sliding block 8; the motor 2 drives the screw rod 5 to rotate, and the screw rod nut 6 converts the rotary motion of the screw rod 5 into reciprocating linear motion along the sliding direction of the sliding rail 7 under the restriction of the sliding block 8 and the sliding rail 7, so that the piston rod 14 is driven to complete the extrusion and homing actions.
Referring to fig. 1, the push rod filament extrusion nozzle 200 includes a support base i 9, a heat insulation housing i 10, a heating base sleeve i 11, a material barrel i 12, an extrusion connector 13, a piston rod 14, a piston 15, a needle connector i 16, a needle i 17, and a cooling component 34; the supporting seat I9 and the heat preservation shell I10 are coaxially and sequentially sleeved outside the heating base sleeve I11, so that the supporting fixation and heat preservation of the heating base sleeve I11 are realized; the cooling component 34 is arranged between the heat insulation shell I10 and the heating base sleeve I11; the axial direction of the material barrel I12 is consistent with the sliding direction of the sliding rail 7; the supporting seat I9 is detachably arranged on the base 1, the needle head I17, the needle head connecting piece I16 and the material barrel I12 are coaxially and sequentially arranged in the heating base sleeve I11, and the heating base sleeve I11 and the cooling component 34 are used for adjusting the temperature of the materials in the needle head I17 and the needle head connecting piece I16 so as to achieve a printing flowing state; the needle I17 extends out of one end port of the heating base sleeve I11, and the material barrel I12 extends out of the other end port of the heating base sleeve I11; the piston 15 is arranged in the material barrel I12 and is in sliding connection with the material barrel I12; one end of the piston rod 14 extends into the material barrel I12 and is fixedly connected with the piston 15, and the other end of the piston rod 14 is fixedly connected with the screw nut 6 through the extrusion connecting piece 13; the material in the material barrel I12 pushes the piston rod 14 through the push rod driving mechanism 100, so that the material is extruded out of the needle I17, and the printing function is realized.
Referring to fig. 5, the heating base sleeve i 11 comprises three parts, namely a straight cylinder heat preservation sleeve i 11-1, a cone cylinder heat preservation sleeve i 11-2 and a needle heat preservation sleeve, wherein the straight cylinder heat preservation sleeve i 11-1 is sleeved outside the connection parts of the material barrel i 12 and the needle head connecting piece i 16, the cone cylinder heat preservation sleeve i 11-2 is sleeved outside the connection parts of the needle head connecting piece i 16 and the needle head i 17, and the needle head heat preservation sleeve is sleeved outside the needle head i 17.
Further, a heating rod I11-3 is arranged in the straight cylinder heat preservation sleeve I11-1 and in the cone cylinder heat preservation sleeve I11-2 respectively, the heating rod I11-3 in the straight cylinder heat preservation sleeve I11-1 is positioned at the joint of the material barrel I12 and the needle head connecting piece I16, and the heating rod I11-3 in the cone cylinder heat preservation sleeve I11-2 is positioned at the position of the needle head connecting piece I16.
Furthermore, a temperature sensor I11-4 is also arranged at the position between the heating rod I11-3 and the needle head connecting piece I16 in the cone thermal insulation sleeve I11-2, and the temperature of the material is monitored in real time by the temperature sensor I11-4 in the system of the 3D printer.
Further, the extrusion connecting piece 13 is L-shaped, the horizontal connecting part of the extrusion connecting piece 13 is mounted on the screw nut 6, the vertical connecting part of the extrusion connecting piece 13 is mounted at the end part of the piston rod 14 through the anti-drop knob 18, and the vertical connecting part of the extrusion connecting piece 13 and the anti-drop knob 18 can axially move.
Furthermore, a stress sensor 19 is sleeved on the anti-falling knob 18 and between the vertical connecting part of the extrusion connecting piece 13 and the piston rod 14, and the stress sensor 19 is utilized by the system of the 3D printer to detect the pressure between the extrusion connecting piece 13 and the piston rod 14.
Referring to fig. 1, a Pogo pin male seat 20 is installed on the lower end surface of the supporting seat i 9, a Pogo pin female seat 21 is installed on the upper end surface of the base 1, and the Pogo pin male seat 20 on the supporting seat i 9 is in butt joint with the Pogo pin female seat 21 on the base 1 through an interface, so that quick detachment of a circuit is realized.
Referring to fig. 2 and 4, two limit sensors 22 are installed side by side on one side of the base 1, wherein one limit sensor 22 is installed on one end of the base 1 close to the motor base 3, and the other limit sensor 22 is installed on one end of the base 1 close to the push rod wire extrusion nozzle 200; one side of the screw nut 6 facing the limit sensor 22 is provided with an induction metal sheet 23, and the two limit sensors 22 and the induction metal sheet 23 are used for limiting the movement stroke of the piston rod 14.
In this embodiment, when the push rod wire extrusion nozzle 200 is required to perform 3D printing, the push rod wire extrusion nozzle 200 is mounted on the base 1, and the Pogo pin male seat 20 on the push rod wire extrusion nozzle 200 is in butt joint with the Pogo pin female seat 21 on the base 1 through an interface, so that a circuit part is connected; the vertical connecting part of the extrusion connecting piece 13 is connected with the piston rod 14 through the anti-falling knob 18, and a stress sensor 19 is sleeved between the vertical connecting part of the extrusion connecting piece 13 and the piston rod 14; the motor 2 is reversed, the motor shaft drives the screw rod 5 to rotate through the coupler 4, the screw rod nut 6 moves along the side of the slide rail 7, which is opposite to the push rod wire extrusion nozzle 200, under the restriction of the slide rail 7 and the slide block 8, the screw rod nut 6 drives the piston rod 14 and the piston 15 to pull out the material barrel I12 through the extrusion connecting piece 13, and the printing material is put into the material barrel I12; the motor 2 rotates positively, the motor shaft drives the screw 5 to rotate through the coupler 4, the screw nut 6 moves towards the push rod wire extrusion nozzle 200 side along the slide rail 7 under the restriction of the slide rail 7 and the slide block 8, the screw nut 6 drives the piston rod 14 and the piston 15 to move towards the material barrel I12 side through the extrusion connecting piece 13 until the piston 15 is inserted into the inner cavity of the material barrel I12 and extrudes printing materials, the numerical value of the stress sensor 19 reaches a set threshold, and the motor 2 stops rotating; according to the attribute of printing materials, the high-temperature extruding or low-temperature extruding mode is determined, the temperature of a material barrel is regulated and controlled in advance by utilizing a heating base sleeve and a cooling component, materials are melted, meanwhile, the materials are extruded by utilizing an extrusion module, a system of the 3D printer is based on the temperature value of the material barrel measured by a temperature sensor and the magnitude of the material extrusion pressure measured by a pressure sensor, a relation curve between the material extrusion pressure and the heating temperature of the materials is established in real time, the temperature of the materials is regulated and controlled in real time by utilizing the heating base sleeve and the cooling component based on the temperature corresponding to the pressure in the optimal molten state obtained by the curve, closed-loop control is realized, the materials are not limited and influenced by the actual working conditions such as ambient temperature, the optimal molten state of the materials is always kept, the motor 2 continues to rotate positively, the piston rod 14 and the piston 15 move towards the needle I17 side, the extruding function of the needle I17 is realized for extruding the materials, and printing is started.
Referring to fig. 3, the pneumatic driving mechanism 300 includes a quick-acting adapter 24 and an air pipe joint 25, the base 1 is provided with an air inlet through hole i 1-1 penetrating through the upper and lower surfaces, the quick-acting adapter 24 is provided with an air inlet through hole ii 24-1, the quick-acting adapter 24 is mounted on the lower surface of the tail of the base 1, the air inlet through hole ii 24-1 of the quick-acting adapter 24 is communicated with the air inlet through hole i 1-1 of the base 1, and the air pipe joint 25 is mounted on the air inlet end of the air inlet through hole ii 24-1 of the quick-acting adapter 24 to provide power for pneumatic wire extrusion. The pneumatic driving mechanism 300 is integrated with the base 1, so that the volume of the pneumatic driving mechanism 300 is reduced.
Referring to fig. 3, the pneumatic filament extrusion nozzle 400 includes a pneumatic connection plate 26, a thermal insulation shell ii 27, a heating base sleeve ii 28, a pneumatic adapter 29, a material barrel ii 30, a needle connector ii 31, a needle ii 32, and a cooling component 34; the pneumatic connecting plate 26 is L-shaped, an air inlet through hole III 26-1 is formed in the horizontal part of the pneumatic connecting plate 26, and a central mounting hole 26-2 is formed in the vertical part of the pneumatic connecting plate 26; the horizontal part of the pneumatic connecting plate 26 is arranged on the upper surface of the base 1, and an air inlet through hole III 26-1 on the pneumatic connecting plate 26 is communicated with an air inlet through hole I1-1 on the base 1; one end of the heating base sleeve II 28 is inserted into a central mounting hole 26-2 on the vertical part of the pneumatic connecting plate 26, so that the heating base sleeve II 28 is fixed; the heat-insulating shell II 27 is sleeved outside the heating base sleeve II 28 and fixedly arranged on the vertical part of the pneumatic connecting plate 26, and is used for realizing heat insulation of the heating base sleeve II 28; the cooling component 34 is arranged between the heat insulation shell II 27 and the heating base sleeve II 28; the needle II 32, the needle connecting piece II 31 and the material barrel II 30 are sequentially and coaxially inserted into the heating base sleeve II 28, and the heating base sleeve II 28 and the cooling component 34 are used for regulating and controlling the temperature of materials in the needle II 32 and the needle connecting piece II 31 to enable the materials to reach a printing flowing state; the pneumatic adapter 29 is respectively inserted into the feeding end port of the material barrel II 30 and the horizontal part of the pneumatic connecting plate 26, so that the air inlet through hole III 26-1 on the pneumatic connecting plate 26 is communicated with the inner cavity of the material barrel II 30.
The lower end face of the pneumatic connecting plate 26 is provided with a male Pogo pin seat, and the male Pogo pin seat on the pneumatic connecting plate 26 is in butt joint with the female Pogo pin seat 21 on the base 1 through an interface, so that quick disconnection of a circuit is realized.
Referring to fig. 6, the heating base sleeve ii 28 comprises three parts, namely a straight cylinder heat preservation sleeve ii 28-1, a cone cylinder heat preservation sleeve ii 28-2 and a needle tip heat preservation sleeve 28-3, wherein the straight cylinder heat preservation sleeve ii 28-1 is sleeved outside the connection part of the material barrel ii 30 and the needle head connecting piece ii 31, the cone cylinder heat preservation sleeve ii 28-2 is sleeved outside the connection part of the needle head connecting piece ii 31 and the needle head ii 32, and the needle tip heat preservation sleeve 28-3 is sleeved outside the needle head ii 32.
Further, a heating rod II 28-4 is respectively arranged in the straight cylinder heat preservation sleeve II 28-1 and the conical cylinder heat preservation sleeve II 28-2, the heating rod II 28-4 in the straight cylinder heat preservation sleeve II 28-1 is positioned at the joint of the material barrel II 30 and the needle head connecting piece II 31, and the heating rod II 28-4 in the conical cylinder heat preservation sleeve II 28-2 is positioned at the position of the needle head connecting piece II 31.
Furthermore, a temperature sensor II 28-5 is also installed in the cone thermal insulation sleeve II 28-2 and at the position between the heating rod II 28-4 and the needle head connecting piece II 31, and the temperature of the material is monitored in real time by the system of the 3D printer through the temperature sensor II 28-5.
Referring to fig. 7, the pneumatic adapter 29 is a three-way valve-like structure, on which three air pipes 29-1 are arranged, one air pipe 29-1 is connected to the pneumatic connecting plate 26, the second air pipe 29-1 is connected to the material barrel ii 30, a pressure sensor 33 is arranged in the third air pipe 29-1, and the system of the 3d printer determines the air pressure in the inner cavity of the material barrel ii 30 by using the pressure sensor 33.
Referring to fig. 1 and 3, the cooling assembly 34 includes a plurality of semiconductor cooling plates 34-1 and a cooling plate 34-2, the semiconductor cooling plates 34-1 are respectively mounted on the upper surface and the lower surface of the cooling plate 34-2, the semiconductor cooling plate 34-1 on the upper surface of the cooling plate 34-2 contacts with the outer surface of the heating base sleeve to cool the material, and the semiconductor cooling plate 34-1 on the lower surface of the cooling plate 34-2 contacts with the inner wall of the heat insulation shell to cool the heat insulation shell.
Two flow channels are formed in the quick adapter plate 24, one is a medium inflow channel, the other is a medium outflow channel, and a connecting joint 36 is connected to a port of each flow channel on the quick adapter plate 24 to realize the inflow and outflow of cooling circulation mediums; the heat dissipation plate 34-2 is internally provided with a runner, one runner on the quick-change plate 24 is connected with an inlet of the runner in the heat dissipation plate 34-2 through a quick-change connector 35, the other runner on the quick-change plate 24 is connected with an outlet of the runner in the heat dissipation plate 34-2 through the quick-change connector 35, and the runner in the heat dissipation plate 34-2 and the two runners on the quick-change plate 24 form a circulation channel of cooling medium.
When the temperature of the material body needs to be controlled and reduced, the cooling liquid enters the medium inflow channel of the quick adapter plate 24 through the connecting joint 36, then enters the flow channel of the heat dissipation plate 34-2 through the quick adapter joint 35, and flows out through the flow channel outlet of the heat dissipation plate 34-2 and the medium outflow channel of the quick adapter plate 24 after the medium circulates. The heat dissipation plate 34-2 plays a role in cooling, heat conducted by the semiconductor refrigeration piece 34-1 is taken away, the semiconductor refrigeration piece 34-1 plays a role in refrigeration, and the temperature of the heating matrix and the heat preservation shell is reduced.
In this embodiment, when the pneumatic wire extrusion nozzle 400 is required to perform 3D printing, the push rod wire extrusion nozzle 200 is detached from the base 1, then the pneumatic wire extrusion nozzle 400 is mounted on the base 1, the air inlet through hole iii 26-1 on the pneumatic connecting plate 26 is communicated with the air inlet through hole i 1-1 on the base 1, the Pogo pin male seat on the pneumatic connecting plate 26 is in butt joint with the Pogo pin female seat 21 on the base 1 through an interface, and the circuit is partially connected; the pneumatic adapter 29 is detached from the material barrel II 30, materials are added into the material barrel II 30, then one air pipe 29-1 of the pneumatic adapter 29 is inserted into the material barrel II 30, the other air pipe 29-1 of the pneumatic adapter 29 is inserted into the pneumatic connecting plate 26, and the inner cavity of the material barrel II 30 is communicated with the air inlet through hole III 26-1 of the pneumatic connecting plate 26 through the pneumatic adapter 29; the air source is opened, the air sequentially passes through the air pipe joint 25, the air inlet through hole II 24-1 on the quick adapter plate 24, the air inlet through hole I1-1 on the base 1, the air inlet through hole III 26-1 on the pneumatic connecting plate 26 and the air pipe 29-1 on the pneumatic adapter 29 to enter the inner cavity of the material barrel II 30, and when the air pressure value detected by the pressure sensor 33 reaches a set threshold value, the air inlet is stopped; according to the attribute of printing materials, the high-temperature extruding or low-temperature extruding mode is determined, the temperature of a material barrel is regulated and controlled in advance by utilizing a heating base sleeve and a cooling component, materials are melted, meanwhile, the materials are extruded by utilizing an extrusion module, a system of the 3D printer is based on the temperature value of the material barrel measured by a temperature sensor and the magnitude of the material extrusion pressure measured by a pressure sensor, a relation curve between the material extrusion pressure and the heating temperature of the materials is established in real time, the temperature of the materials is regulated and controlled in real time by utilizing the heating base sleeve and the cooling component based on the temperature corresponding to the pressure in the optimal melting state obtained by the curve, closed-loop control is realized, the materials are not limited and influenced by the actual working conditions such as ambient temperature, the optimal melting state of the materials is always kept, an air source is opened, the materials in the material barrel II 30 are extruded, and printing is started.
In the application, the 3D printer integrates two extrusion driving modes of electric and pneumatic, the extrusion nozzle opposite to the electric extrusion driving mode is of a separated structure, the extrusion nozzle opposite to the pneumatic extrusion driving mode is of a separated structure, and the two extrusion nozzles and the base are detachably mounted, so that the two extrusion modes are realized by changing different extrusion nozzles, and the applicability of the printer is greatly improved. Meanwhile, the invention can use various printing spray heads, can be quickly disassembled and assembled, is convenient to maintain, can even directly replace new spray heads, and has short maintenance period and low cost.
In the application, an integral three-layer temperature control structure is adopted, a heat preservation shell, a heating base sleeve, a cooling assembly and a material barrel are arranged from outside to inside, wherein materials in the material barrel, a needle head connecting piece and a needle head are integrally heated through two stages of heating rods which are axially arranged, the heating area is large, the heating speed is high, the effect is uniform, and the heating base sleeve and the heating rods are made of high-heat-melting materials; the cooling assembly plays a role in refrigeration through the semiconductor refrigeration piece 34-1, the heat conducted by the semiconductor refrigeration piece 34-1 is taken away by the heat dissipation plate 34-2, and temperature control is realized under the synergistic effect of the heating base sleeve and the cooling assembly; the heat insulation layer adopts a heat insulation tape to play a role in protection; the inner material barrel has biocompatibility, is detachable and replaceable, and has good heat conducting performance.
In the application, since the molten state of the material determines the quality of the 3D printing forming technology, the extruding pressure of the nozzle is changed along with the change of the state, and the temperature determines the molten state of the material, the actual printing temperature of the 3D printer plays a key role in the printing quality; according to the invention, the initial temperature of the 3D printer is preset according to the material characteristics, but a temperature sensor in the 3D printer has measurement errors, and the actual printing temperature of the 3D printer is inconsistent with the preset initial temperature under different printing working conditions, so that the material cannot be in an optimal melting state, and the printing quality is poor; according to the invention, the temperature of the material barrel is regulated and controlled in advance by using the heating base sleeve and the cooling component, so that the material is melted, meanwhile, the material is extruded by using the extrusion module, the system of the 3D printer is based on the temperature value of the material barrel measured by the temperature sensor and the material extrusion pressure measured by the pressure sensor, a relation curve between the material extrusion pressure and the heating temperature of the material is established in real time, the temperature corresponding to the pressure in the optimal melting state obtained based on the curve is regulated and controlled in real time by using the heating base sleeve and the cooling component, closed-loop control is realized, the material is not limited and influenced by the actual working conditions such as the ambient temperature, and the optimal melting state of the material is always kept and printing is performed.
In the application, the Pogo Pin connector is used as an electric connector and also used as a nozzle identification position, and as the spring pins on the Pogo Pin male seats in different filament extrusion nozzles are different from the connection positions of the Pogo Pin female seats on the base, the identification function is achieved, different printing nozzles can be automatically distinguished, and corresponding driving programs are selected; compared with the traditional spray head circuit, the spray head circuit is directly connected with the control circuit through a wire, and has the functions of quick assembly disassembly and automatic spray head type identification.
In this application, material bucket, syringe needle connecting piece and syringe needle adopt split type structure, conveniently dismantle and wash.
In the application, each filament extrusion nozzle can be switched into different temperature regulation modes according to different printing materials so as to realize high-temperature filament extrusion or low-temperature filament extrusion; in the low-temperature wire extrusion mode or the high-temperature wire extrusion mode, the temperature can be regulated and controlled repeatedly through the feedback measured by the heating base sleeve, the cooling component and the temperature sensor, so that the aim of accurately controlling the temperature is fulfilled; after the high-temperature wire extrusion mode is finished, the cooling group can be used for rapidly cooling, so that the spray head can be rapidly replaced, and scalding is prevented.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (2)
1. Biological 3D prints crowded silk module with dual drive, its characterized in that: the device comprises a base (1), a push rod driving mechanism (100), a push rod wire extrusion nozzle (200), a pneumatic driving mechanism (300) and a pneumatic wire extrusion nozzle (400), wherein the push rod driving mechanism (100) and the pneumatic driving mechanism (300) are respectively arranged at two ends of the base (1) in the length direction, and the push rod wire extrusion nozzle (200) or the pneumatic wire extrusion nozzle (400) is detachably arranged at one end, close to the pneumatic driving mechanism (300), of the base (1); the push rod driving mechanism (100) is used for pushing the push rod wire extrusion nozzle (200) to extrude wires, and the pneumatic driving mechanism (300) is used for extruding wires through the pneumatic wire extrusion nozzle (400);
the push rod driving mechanism (100) comprises a motor (2), a motor seat (3), a coupler (4), a screw rod (5), a screw rod nut (6), a sliding rail (7) and a sliding block (8); the motor (2) is arranged at one end of the base (1) through the motor seat (3), the sliding rail (7) is arranged on the base (1) and is positioned at one side of the motor seat (3), and the sliding direction of the sliding rail (7) is the same as the length direction of the base (1); the output end of the motor (2) is fixedly connected with one end of a screw rod (5) through a coupler (4), and the screw rod nut (6) is in threaded connection with the screw rod (5) and is in sliding connection with a sliding rail (7) through a sliding block (8);
The push rod silk extrusion nozzle (200) comprises a supporting seat I (9), a heat preservation shell I (10), a heating base sleeve I (11), a material barrel I (12), an extrusion connecting piece (13), a piston rod (14), a piston (15), a needle head connecting piece I (16), a needle head I (17) and a cooling assembly (34); the support seat I (9) and the heat preservation shell I (10) are coaxially and sequentially sleeved outside the heating base sleeve I (11), and the cooling assembly (34) is arranged between the heat preservation shell I (10) and the heating base sleeve I (11); the supporting seat I (9) is detachably arranged on the base (1), the needle head I (17), the needle head connecting piece I (16) and the material barrel I (12) are coaxially and sequentially arranged in the heating base sleeve I (11), the needle head I (17) extends out of one end port of the heating base sleeve I (11), and the material barrel I (12) extends out of the other end port of the heating base sleeve I (11); the axial direction of the material barrel I (12) is consistent with the sliding direction of the sliding rail (7); the piston (15) is arranged in the material barrel I (12) and is in sliding connection with the material barrel I (12); one end of the piston rod (14) extends into the material barrel I (12) and is fixedly connected with the piston (15), and the other end of the piston rod (14) is fixedly connected with the screw nut (6) through the extrusion connecting piece (13);
The heating base sleeve I (11) comprises a straight cylinder heat preservation sleeve I (11-1), a cone cylinder heat preservation sleeve I (11-2) and a needle heat preservation sleeve, wherein the straight cylinder heat preservation sleeve I (11-1) is sleeved outside a material barrel I (12) and the joint of the material barrel I (12) and a needle head connecting piece I (16), the cone cylinder heat preservation sleeve I (11-2) is sleeved outside the joint of the needle head connecting piece I (16) and the needle head I (17), and the needle head heat preservation sleeve is sleeved outside the needle head I (17); a heating rod I (11-3) is respectively arranged in the straight cylinder heat preservation sleeve I (11-1) and the conical cylinder heat preservation sleeve I (11-2), the heating rod I (11-3) in the straight cylinder heat preservation sleeve I (11-1) is positioned at the joint of the material barrel I (12) and the needle head connecting piece I (16), and the heating rod I (11-3) in the conical cylinder heat preservation sleeve I (11-2) is positioned at the position of the needle head connecting piece I (16); a temperature sensor I (11-4) is arranged in the cone heat preservation sleeve I (11-2) and positioned between the heating rod I (11-3) and the needle head connecting piece I (16) and is used for monitoring the temperature of materials in real time;
the extrusion connecting piece (13) is L-shaped, a horizontal connecting part of the extrusion connecting piece (13) is arranged on the screw nut (6), a vertical connecting part of the extrusion connecting piece (13) is arranged at the end part of the piston rod (14) through an anti-falling knob (18), and axial movement can be realized between the vertical connecting part of the extrusion connecting piece (13) and the anti-falling knob (18); a stress sensor (19) is sleeved on the anti-falling knob (18) and between the vertical connecting part of the extrusion connecting piece (13) and the piston rod (14);
The pneumatic driving mechanism (300) comprises a quick adapter plate (24) and an air pipe joint (25), wherein an air inlet through hole I (1-1) penetrating through the upper surface and the lower surface is formed in the base (1), an air inlet through hole II (24-1) is formed in the quick adapter plate (24), the quick adapter plate (24) is arranged on the lower surface of the tail of the base (1), the air inlet through hole II (24-1) in the quick adapter plate (24) is communicated with the air inlet through hole I (1-1) in the base (1), and the air pipe joint (25) is arranged at the air inlet end of the air inlet through hole II (24-1) in the quick adapter plate (24) to provide power for pneumatic wire extrusion;
the pneumatic silk extrusion nozzle (400) comprises a pneumatic connecting plate (26), a heat insulation shell II (27), a heating base sleeve II (28), a pneumatic adapter (29), a material barrel II (30), a needle head connecting piece II (31), a needle head II (32) and a cooling component (34); the pneumatic connecting plate (26) is L-shaped, an air inlet through hole III (26-1) is formed in the horizontal part of the pneumatic connecting plate (26), and a central mounting hole (26-2) is formed in the vertical part of the pneumatic connecting plate (26); the horizontal part of the pneumatic connecting plate (26) is arranged on the upper surface of the base (1), and an air inlet through hole III (26-1) on the pneumatic connecting plate (26) is communicated with an air inlet through hole I (1-1) on the base (1); one end of the heating base sleeve II (28) is inserted into a central mounting hole (26-2) on the vertical part of the pneumatic connecting plate (26); the heat-insulating shell II (27) is sleeved outside the heating base sleeve II (28) and fixedly arranged on the vertical part of the pneumatic connecting plate (26), and the cooling assembly (34) is arranged between the heat-insulating shell II (27) and the heating base sleeve II (28); the needle II (32), the needle connecting piece II (31) and the material barrel II (30) are sequentially and coaxially inserted into the heating base sleeve II (28); the pneumatic adapter (29) is respectively inserted into the horizontal part of the pneumatic connecting plate (26) at the feeding end port of the material barrel II (30), so that an air inlet through hole III (26-1) on the pneumatic connecting plate (26) is communicated with the inner cavity of the material barrel II (30);
The heating base sleeve II (28) comprises a straight cylinder heat preservation sleeve II (28-1), a cone cylinder heat preservation sleeve II (28-2) and a needle tip heat preservation sleeve (28-3), wherein the straight cylinder heat preservation sleeve II (28-1) is sleeved outside a material barrel II (30) and the joint of the material barrel II (30) and a needle head connecting piece II (31), the cone cylinder heat preservation sleeve II (28-2) is sleeved outside the joint of the needle head connecting piece II (31) and the needle head II (32), and the needle tip heat preservation sleeve (28-3) is sleeved outside the needle head II (32); a heating rod II (28-4) is respectively arranged in the straight cylinder heat preservation sleeve II (28-1) and the conical cylinder heat preservation sleeve II (28-2), the heating rod II (28-4) in the straight cylinder heat preservation sleeve II (28-1) is positioned at the joint of the material barrel II (30) and the needle head connecting piece II (31), and the heating rod II (28-4) in the conical cylinder heat preservation sleeve II (28-2) is positioned at the position of the needle head connecting piece II (31); a temperature sensor II (28-5) is also arranged in the cone heat preservation sleeve II (28-2) and at a position between the heating rod II (28-4) and the needle head connecting piece II (31); three communicated air pipes (29-1) are arranged on the pneumatic adapter (29), one air pipe (29-1) is connected to the pneumatic connecting plate (26), the second air pipe (29-1) is connected to the material barrel II (30), and a pressure sensor (33) is arranged in the third air pipe (29-1);
The power supply device comprises a base (1), a power supply device and a power supply device, wherein a power supply device is arranged on the upper end face of the base (1), a power supply female seat (21) is arranged on the upper end face of the base, a power supply male seat (20) is arranged on the lower end face of a supporting seat I (9), and the power supply male seat (20) on the supporting seat I (9) is in butt joint with the power supply female seat (21) on the base (1) through an interface; the lower end face of the pneumatic connecting plate (26) is provided with a male Pogo pin seat, and the male Pogo pin seat on the pneumatic connecting plate (26) is in butt joint with a female Pogo pin seat (21) on the base (1) through an interface.
2. The bio-3D printing filament extrusion module with dual drive of claim 1, wherein: the cooling assembly (34) comprises a semiconductor refrigerating sheet (34-1) and a radiating plate (34-2), wherein the semiconductor refrigerating sheet (34-1) is respectively arranged on the upper surface and the lower surface of the radiating plate (34-2), the semiconductor refrigerating sheet (34-1) on the upper surface of the radiating plate (34-2) is contacted with the outer surface of the heating base sleeve, and the semiconductor refrigerating sheet (34-1) on the lower surface of the radiating plate (34-2) is contacted with the inner wall of the heat preservation shell; two flow channels are formed in the quick adapter plate (24), a connecting joint (36) is connected to the port of each flow channel on the quick adapter plate (24), one flow channel on the quick adapter plate (24) is connected with the inlet of the flow channel in the heat radiating plate (34-2) through a quick connector (35), the other flow channel on the quick adapter plate (24) is connected with the outlet of the flow channel in the heat radiating plate (34-2) through a quick connector (35), and the flow channel in the heat radiating plate (34-2) and the two flow channels on the quick adapter plate (24) form a circulation channel of cooling medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310384796.4A CN116353047B (en) | 2023-04-11 | 2023-04-11 | Biological 3D prints crowded silk module with dual drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310384796.4A CN116353047B (en) | 2023-04-11 | 2023-04-11 | Biological 3D prints crowded silk module with dual drive |
Publications (2)
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| CN217514565U (en) * | 2022-03-25 | 2022-09-30 | 东北林业大学 | Extrusion type spray head device capable of continuously feeding for biogel printing |
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| CN103753818A (en) * | 2014-01-21 | 2014-04-30 | 哈尔滨工业大学 | Micro sprinkler for manufacturing three-dimensional micro-nano fiber bracket |
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| CN116353047A (en) | 2023-06-30 |
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