CN217098932U - Fast-assembling high-temperature pneumatic direct-writing type biological printing nozzle - Google Patents
Fast-assembling high-temperature pneumatic direct-writing type biological printing nozzle Download PDFInfo
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- CN217098932U CN217098932U CN202220281788.8U CN202220281788U CN217098932U CN 217098932 U CN217098932 U CN 217098932U CN 202220281788 U CN202220281788 U CN 202220281788U CN 217098932 U CN217098932 U CN 217098932U
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Abstract
The utility model provides a quick-mounting high temperature pneumatics is directly write biological shower nozzle of formula belongs to biological printing device field. The problem of how to carry out accurate control to each regional material temperature in the pneumatic printing process, how further to pull up the heatable interval of shower nozzle under the condition that does not improve heating device ability to and simplify the operation, practice thrift the space is solved. This print printing storage bucket of shower nozzle's periphery upper portion parcel has storage bucket heating device, the lower part parcel has nozzle heating device, storage bucket heating device internally mounted has one-level temperature control system, nozzle heating device internally mounted second grade temperature control system, the nozzle is installed to the bottom of printing the storage bucket, storage bucket heating device outsourcing has shower nozzle heat preservation shell, quick connector inserts and prints storage bucket upper end, quick connector can cooperate sealedly with the connecting plate, accomplish compressed gas's sealed transmission. The utility model discloses a temperature that feed bin and nozzle department can be controlled respectively to second grade control by temperature change, and the printing process is held to the accuracy.
Description
Technical Field
The utility model belongs to biological printing device field especially relates to a quick-mounting high temperature pneumatics is directly write biological shower nozzle of formula.
Background
3D biological printing is a novel additive manufacturing technology aiming at biological materials, and is characterized in that biological scaffolds, living tissues and cells can be biologically manufactured by taking a 3D digital model as a blueprint. A so-called bioscaffold, which is not itself made of a living material, can serve as a carrier for living cells and tissues for pathological studies; or directly implanted into organism to treat biological diseases, and the material has high biocompatibility or mechanical performance. For printing on a stent, the material used is usually a high molecular polymer which is solid at normal temperature and viscous at high temperature. The unique rheological property of the material makes the material be heated into a viscous flow state which is easy to process, and then the material is extruded and molded in a direct-writing printing mode, an electrostatic spinning printing mode and other modes. After being extruded from the spray head, the material is solidified in air with lower temperature to form a solid part with a specific shape again. As the most common technique, the extrusion direct-write printing technique has the advantages of easy use, high usability and low cost.
The high-temperature direct-writing printing method is divided into two types according to different driving modes: one is to use a lead screw to drive a push rod to extrude the material in the nozzle for electric extrusion type direct writing printing; the other is direct-write printing in which extrusion is performed by using air pressure as a drive. Compared with an electric extrusion type printing mode, the printing mode which takes air pressure as driving saves a screw part, saves space and has smaller volume. In many high-temperature printing nozzles on the market, the heating mode is heating by using a heating rod or a heating wire. The heating capacity varies from one another, subject to various factors.
However, the high-temperature direct-writing printing method in the prior art has the following technical defects:
1. the heating function of the existing extrusion nozzle is only limited to melting the material in the bin by heating. The precise control of the material temperature at the silo and the nozzle is not considered. Since the rheological properties of the printing material are very sensitive to temperature changes, the temperature control of the material at the nozzles and the storage bins becomes extremely important and is a non-negligible point in the use process of the printer.
2. The influence of heat dissipation on the heating function of the spray head is rarely considered in the existing spray head heating. The printed high polymer material can be printed only by high-temperature melting, and the temperature of the material in the nozzle is sharply reduced due to the heat convection phenomenon of the nozzle and air, so that the viscosity of the material is increased, and the printing is difficult.
3. The leading-in compressed gas of material pipe that current pneumatic shower nozzle used outsourcing more, this kind of structure need go deep into the printer small space with both hands at the in-process of shower nozzle installation in, and the dismouting is troublesome hard.
Disclosure of Invention
In view of this, the utility model aims at providing an it has biological 3D of formula high temperature of writing directly to use atmospheric pressure as driven ready-package that has second grade control by temperature change to solve and how to carry out accurate control to each regional material temperature among the pneumatic printing process, how under the condition that does not improve the heating device ability, further pulled up the heatable interval of shower nozzle, and simplified operation, practice thrift the problem in space.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a fast-assembly high-temperature pneumatic direct-writing type biological printing spray head comprises a primary temperature control system, a spray nozzle heating device, a secondary temperature control system, a spray nozzle, a spray head heat preservation shell, a charging basket heating device, a printing charging basket and a fast plug connector,
the periphery upper portion parcel of printing the storage bucket has storage bucket heating device, and the lower part parcel has nozzle heating device, storage bucket heating device internally mounted has one-level temperature control system, and nozzle heating device internally mounted second grade temperature control system, the nozzle is installed to the bottom of printing the storage bucket, storage bucket heating device outsourcing has shower nozzle heat preservation shell, quick connector inserts and prints storage bucket upper end, quick connector can cooperate sealedly with the connecting plate, accomplishes compressed gas's sealed transmission.
Furthermore, a detachable metal sleeve is wrapped outside the nozzle and connected with the printing material barrel.
Furthermore, the nozzle heating device and the detachable metal sleeve are wrapped by a fast-assembling heat insulation sleeve which is arranged below the spray head heat insulation shell.
Furthermore, No. two magnetic steels are embedded in the spray head heat-insulating shell, No. one magnetic steel is embedded in the quick-assembly heat-insulating sleeve, and the first magnetic steel of the quick-assembly heat-insulating sleeve and the second magnetic steel of the spray head heat-insulating shell attract each other to complete second-stage heat insulation.
Furthermore, the spray head heat-insulating shell and the fast-assembling heat-insulating sleeve are both made of non-heat-conducting materials.
Furthermore, the spray head heat preservation shell is installed on the connecting plate.
Furthermore, the charging basket heating device is connected with the connecting plate through a heat insulation plate.
Furthermore, the quick-connection connector is matched with a special-shaped groove on the printing material barrel in a mode of firstly inserting and then twisting, and quick installation is completed.
Furthermore, the quick-connection plug and the connecting plate are respectively provided with spherical surfaces with the same circle center, after the quick-connection plug is installed on the printing charging basket, the quick-connection plug is rotated, the two spherical surfaces are gradually aligned with each other while the quick-connection plug is matched with the printing charging basket, the sealing ring in the circular groove is extruded, and the air path sealing is completed.
Compared with the prior art, the quick-mounting high temperature pneumatics directly write formula biological print shower nozzle's beneficial effect be:
(1) the utility model discloses a shower nozzle will be printed to fixed screw thread mode and nozzle connection, can be based on the big or small customization different shapes of this screw thread, different materials, the nozzle of different internal flow channels, as long as have the nozzle of the same screw thread model, all can successfully install, can support the customization nozzle to go out the silk and print.
(2) The utility model discloses unique quick connector structure makes the user only need two simple actions one-hand operation when reloading can, need not to be more than the action in the bioprinter.
(3) The utility model discloses a fast-assembling insulation cover also can protect the user not scalded by high temperature nozzle when guaranteeing nozzle department high temperature, and the fast-assembling insulation cover has and benefits the user to change the nozzle conveniently at any time.
(4) The utility model discloses a temperature that feed bin and nozzle department can be controlled respectively to second grade control by temperature change, and the printing process is held to the accuracy.
(5) The utility model discloses double-deck heat preservation design can make the heat preservation effect of nozzle department reach best, and whole shower nozzle compact structure, and the exquisiteness is small and exquisite.
(6) The utility model discloses a nozzle insulation cover of storehouse body insulation cover and lower extreme plays isolated outside air's effect, and this kind of condition that is similar to adiabatic can make the inside temperature of nozzle higher. Under the condition of not increasing the burden of a heating system, the integral controllable temperature upper limit of the spray head is greatly improved.
(7) The utility model discloses extrude with compressed gas extrusion material, contain the design to gas flow channel (quick-operation joint). The utility model discloses a quick-operation joint adopts sphere-sealing washer-sphere's connected mode, has provided the position restriction to connecting plate and quick-operation joint in vertical direction, can avoid beating the influence of printer head vibration to the printer head structure of printer head in the space removal in-process. The convex parts at two sides of the quick connector are matched with the special-shaped groove on the printing material barrel, so that the upward jacking effect of the air pressure butt joint after ventilation is limited, and the accurate positioning of two spherical surfaces is ensured
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is an appearance diagram of a fast-assembly high-temperature pneumatic direct-writing type biological printing nozzle according to the present invention;
fig. 2 is a cross-sectional view of the ready-package high-temperature pneumatic direct-writing type bio-printing nozzle according to the present invention;
fig. 3 is a schematic view of the installation of the quick connector according to the present invention, wherein the arrow indicates the insertion direction;
fig. 4 is a schematic view of the installation manner of the quick connector according to the present invention, wherein an arrow indicates a twisting direction;
in the figure, 1-connecting plate, 2-sealing ring, 3-heat insulation plate, 4-primary temperature control system, 5-nozzle heating device, 6-secondary temperature control system, 7-nozzle, 8-detachable metal sleeve, 9-fast-assembly heat insulation sleeve, 10-first magnetic steel, 11-second magnetic steel, 12-nozzle heat insulation shell, 13-charging basket heating device, 14-printing charging basket, 15-elastic washer and 16-quick connector.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely explained below with reference to the drawings in the embodiment of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments.
First embodiment, referring to fig. 1 to 4, a fast-assembly high-temperature pneumatic direct-writing type biological printing spray head is described, which comprises a primary temperature control system 4, a nozzle heating device 5, a secondary temperature control system 6, a nozzle 7, a spray head heat preservation shell 12, a charging basket heating device 13, a printing charging basket 14 and a fast plug 16,
the printing device is characterized in that the upper part of the periphery of the printing charging basket 14 is wrapped with a charging basket heating device 13, the lower part of the periphery of the printing charging basket 14 is wrapped with a nozzle heating device 5, a primary temperature control system 4 is mounted inside the charging basket heating device 13, a secondary temperature control system 6 is mounted inside the nozzle heating device 5, a nozzle 7 is mounted at the bottom of the printing charging basket 14, a spray head heat preservation shell 12 is wrapped outside the charging basket heating device 13, an elastic gasket 15 penetrates through the lower part of a quick connection plug 16 and is inserted into a cavity of the printing charging basket 14, and the quick connection plug 16 and the connecting plate 1 can be matched and sealed to complete sealed transmission of compressed gas.
The nozzle 7 is wrapped by a detachable metal sleeve 8, and the detachable metal sleeve 8 is connected with a printing material barrel 14.
The fast-assembling insulation sleeve 9 is wrapped outside the nozzle heating device 5 and the detachable metal sleeve 8, and the fast-assembling insulation sleeve 9 is installed below the spray head insulation shell 12.
No. two magnet steels 11 are embedded in the spray head heat-insulating shell 12, No. one magnet steel 10 is embedded in the quick-assembly heat-insulating sleeve 9, and the first magnet steel 10 of the quick-assembly heat-insulating sleeve 9 and the second magnet steel 11 of the spray head heat-insulating shell 12 attract each other to complete second-stage heat insulation.
The nozzle insulation casing 12 is mounted on the connection plate 1. The charging basket heating device 13 is connected with the connecting plate 1 through a heat insulation plate 3.
Fast-assembling high temperature pneumatics formula of directly writing biological overall structure and the rationale of printing the shower nozzle directly:
the overall appearance of the fast-assembly high-temperature pneumatic direct-writing type biological printing spray head is shown in figure 1, and the structural cross-sectional view is shown in figure 2. When the printing machine is used, the quick-connection connector 16 is firstly taken down, and printing materials in a solid state are loaded into the printing material barrel 14. The quick connector 16 is then installed and the barrel is heated by the nozzle heating device 5 via the heating mechanism 13. After the material is completely melted, gas is introduced, the compressed gas enters the printing charging basket 14 through the quick-connection plug 16 along the flow channel, and the extrusion of the material is realized through the nozzle 7 connected with the front end of the charging basket. The heat insulation plate 3, the spray head heat insulation shell 12 and the bottom quick-assembly heat insulation sleeve 9 are all made of non-heat-conducting materials, so that heat insulation can be achieved, and the use safety of a user can be protected to a certain extent.
Fast-assembling high temperature pneumatics directly write the biological utility model point that prints the shower nozzle of formula analytic:
utility model point 1: quick connector and pipeline design
The manner of mounting of the quick connector 16 is shown in figures 3 and 4. The quick connector is matched with a special-shaped groove on the printing material barrel 14 in a mode of firstly inserting (figure 3) and then twisting (figure 4) to finish quick installation. The air passage sealing and connection are as shown in fig. 2, and the quick connector 16 is inserted into the charging bucket and then sealed by the sealing ring 2. It can be seen that the two sealing rings 2 are fixed in circular grooves in the connecting plate 1. Note: and 2, parts such as an elastic cushion and the like capable of ensuring sealing can be replaced, and the parts include but are not limited to sealing rings, sealing gaskets, 3D printed special-shaped sealing elements and the like. The quick-connection plug 16 and the connecting plate 1 are respectively provided with spherical surfaces with the same circle center, after the quick-connection plug 16 is installed on the printing charging basket 14, the quick-connection plug 16 is rotated, the two spherical surfaces are gradually aligned with each other when the quick-connection plug is matched with the printing charging basket 14, the sealing ring 2 in the circular groove is extruded, and the air path sealing is completed.
The innovation points are as follows: (1) the existing high-temperature pneumatic printing spray head usually adopts an air pipe plug to introduce air pressure into a system. For high-temperature direct-writing printing, feeding work is required before printing each time. The structure with the air pipe as the flow passage needs to pull the air pipe plug out of the charging bucket every time of charging. Need carry out the bimanualness in narrow and small printer inside, have the dangerous and inconvenient operation of scald. And adopt this quick connector to connect the gas circuit, the installation only needs two steps of inserting and rotatory with the dismantlement process, and is comparatively succinct. (2) The adoption of the spherical surface-sealing ring-spherical surface connection mode provides position limitation on the connecting plate 1 and the quick connector 16 in the vertical direction, and can avoid the influence of the vibration of the printing head in the space moving process on the structure of the printing head. (3) The convex parts on two sides of the quick connector 16 are matched with the special-shaped groove on the printing material barrel 14, the upward jacking effect of the air pressure butt joint after ventilation is limited, and the accurate positioning of two spherical surfaces is ensured
Utility model point 2: two-stage temperature control
As can be seen from the structural sectional view shown in fig. 2, the outer part and the bottom of the barrel body of the charging barrel 14 are respectively wrapped by the charging barrel heating device 13 and the nozzle heating device 5. Two-stage temperature control systems are respectively arranged on the charging basket heating device 13 and the nozzle heating device 5. Note: the heating elements for temperature control include, but are not limited to, heating rods 4, 6, heating wires, thermal resistance wires, spring heating coils, heating bands, heating wires, and other heating systems. The lower ends of the printing material barrel 14 bin and the printing material barrel 14 can be heated respectively.
The innovation points are as follows: (1) for air-pressure driven high-temperature direct-write printing, it is necessary to ensure that the liquid in the silo is completely melted. Since most of the printing material is thermoplastic polymer, the fluid properties are extremely sensitive to temperature. A common heating system does not have secondary temperature control, the lower end of the stock bin is close to an outlet, and due to the fact that the pipe diameter is small and the stock bin is close to air, the phenomenon that materials in the lower end nozzle are cooled too fast to solidify and cannot be extruded smoothly finally can occur in the using process due to the fact that the ambient temperature is low. And install second level control by temperature change additional in the lower extreme, can guarantee the temperature of storage bucket bottom, alleviate the phenomenon that can't extrude because the bottom dispels the heat and lead to too fast. (2) For various materials and various requirements in the experiment and printing process, sometimes the higher the temperature is, the better the temperature is, and the temperature at the nozzle and the temperature at the bin are different. The two-stage temperature control can control the difference of the two temperatures, so that more accurate temperature field control can be performed.
Utility model point 3: double-layer nozzle heat preservation structure
As shown in fig. 2, the lower end is a double-layer nozzle heat-insulating structure. The heat insulation structure consists of an internal detachable metal sleeve 8 and an external quick-assembly heat insulation sleeve 9. The detachable metal sleeve 8 inside is connected with the nozzle heating device 5, and high temperature can be transferred to the nozzle 7 in a surface contact mode to finish primary heat preservation and heat conduction. And the external fast-assembly heat insulation sleeve 9 is provided with a first magnetic steel 10 which can attract the spray head heat insulation shell 12 by the magnetic force between the first magnetic steel 10 and a second magnetic steel 11, so that secondary heat insulation and heat insulation are completed.
The innovation points are as follows: (1) heat conduction and thermal insulation are two common heat preservation modes, which respectively have advantages and disadvantages: the heat conducting structure is mostly metal, and the high heat conductivity of the heat conducting structure brings good heat conducting effect and simultaneously makes the heat conducting structure easily influenced by the outside. If the conditions of air exhaust and the like exist outside, the temperature inside the metal heat conduction sleeve can generate large fluctuation under the influence of forced convection heat exchange; the heat-insulating sleeve is mostly made of materials with low heat conductivity, which shows that the heat-conducting capability of the heat-insulating sleeve is not strong, but the external interference resistance is strong. So the utility model discloses in combine two kinds of modes, inside adopts metal heat conduction to carry out the local heating to the nozzle, and the outside adopts the isolated external influence of insulation cover to can prevent that the metal from scalding one's hand, kill two birds with one stone. (2) Fast-assembling insulation cover. In the actual use of the head, the nozzle 7 may be deformed or damaged due to improper use or misoperation. Researchers often have a need to individually replace nozzles without disassembling the overall spray head. In order to deal with the situation, the outer heat insulation sleeve 9 which is connected by magnetic attraction and the inner heat conduction sleeve 8 which is connected by screw thread can be taken down layer by layer when the nozzle 7 needs to be replaced, and the nozzle is installed again after replacement, so that the installation process is quick and simple.
The embodiment of the present invention disclosed above is only used to help illustrate the present invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention.
Claims (10)
1. The utility model provides a quick-mounting high temperature pneumatics is write formula biology and is printed shower nozzle directly which characterized in that: comprises a primary temperature control system (4), a nozzle heating device (5), a secondary temperature control system (6), a nozzle (7), a spray head heat preservation shell (12), a charging basket heating device (13), a printing charging basket (14) and a quick connector (16),
print the periphery upper portion parcel of storage bucket (14) and have storage bucket heating device (13), the lower part parcel has nozzle heating device (5), storage bucket heating device (13) internally mounted has one-level temperature control system (4), and nozzle heating device (5) internally mounted second grade temperature control system (6), nozzle (7) are installed to the bottom of printing storage bucket (14), storage bucket heating device (13) outsourcing has shower nozzle heat preservation shell (12), quick connector (16) insert and print storage bucket (14) upper end, quick connector (16) can cooperate sealedly with connecting plate (1), accomplish compressed gas's sealed transmission.
2. The ready-to-mount high-temperature pneumatic direct-write bioprinting head of claim 1, wherein: the nozzle (7) is wrapped by a detachable metal sleeve (8), and the detachable metal sleeve (8) is connected with the printing material barrel (14).
3. The ready-to-assemble high-temperature pneumatic direct-writing bioprinting head according to claim 1 or 2, wherein: the nozzle heating device (5) and the detachable metal sleeve (8) are wrapped by a fast-assembling heat insulation sleeve (9), and the fast-assembling heat insulation sleeve (9) is installed below the spray head heat insulation shell (12).
4. The ready-to-mount high-temperature pneumatic direct-write bioprinting head of claim 1, wherein: no. two magnet steels (11) are embedded in the spray head heat-insulating shell (12), No. one magnet steel (10) is embedded in the fast-assembly heat-insulating sleeve (9), and the No. one magnet steel (10) of the fast-assembly heat-insulating sleeve (9) and the No. two magnet steels (11) of the spray head heat-insulating shell (12) attract each other to complete second-stage heat insulation.
5. The ready-to-assemble high-temperature pneumatic direct-writing bioprinting head according to claim 1 or 4, wherein: the heat insulation plate (3), the spray head heat insulation shell (12) and the fast-assembling heat insulation sleeve (9) are all made of non-heat-conducting materials.
6. The ready-to-mount high-temperature pneumatic direct-write bioprinting head of claim 1, wherein: the nozzle heat-insulating shell (12) is arranged on the connecting plate (1).
7. The ready-to-mount high-temperature pneumatic direct-write bioprinting head of claim 1, wherein: the charging bucket heating device (13) is connected with the connecting plate (1) through a heat insulation plate (3).
8. The ready-to-mount high-temperature pneumatic direct-write bioprinting head of claim 1, wherein: the quick-connection connector (16) is matched with a special-shaped groove on the printing material barrel (14) in a mode of firstly inserting and then twisting to finish quick installation.
9. The ready-package high-temperature pneumatic direct-writing bioprinting head according to claim 1 or 8, wherein: the quick-connection-peg (16) and the connecting plate (1) are respectively provided with spherical surfaces with the same circle center, after the quick-connection-peg (16) is installed on the printing charging basket (14), the quick-connection-peg (16) is rotated, and the two spherical surfaces are gradually aligned with each other while the quick-connection-peg (16) is matched with the printing charging basket (14), so that the sealing ring (2) in the circular groove is extruded, and the air path sealing is completed.
10. The ready-to-mount high-temperature pneumatic direct-write bioprinting head of claim 1, wherein: the lower part of the quick-connection plug (16) penetrates through an elastic gasket (15) and is inserted into the cavity of the printing material barrel (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220281788.8U CN217098932U (en) | 2022-02-11 | 2022-02-11 | Fast-assembling high-temperature pneumatic direct-writing type biological printing nozzle |
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| CN202220281788.8U CN217098932U (en) | 2022-02-11 | 2022-02-11 | Fast-assembling high-temperature pneumatic direct-writing type biological printing nozzle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116353047A (en) * | 2023-04-11 | 2023-06-30 | 哈尔滨工业大学 | Biological 3D prints crowded silk module with dual drive |
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- 2022-02-11 CN CN202220281788.8U patent/CN217098932U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116353047A (en) * | 2023-04-11 | 2023-06-30 | 哈尔滨工业大学 | Biological 3D prints crowded silk module with dual drive |
| CN116353047B (en) * | 2023-04-11 | 2024-02-06 | 哈尔滨工业大学 | Biological 3D prints crowded silk module with dual drive |
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