CN111013848A - Spray head device with function of distribution according to needs - Google Patents
Spray head device with function of distribution according to needs Download PDFInfo
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- CN111013848A CN111013848A CN201911337086.6A CN201911337086A CN111013848A CN 111013848 A CN111013848 A CN 111013848A CN 201911337086 A CN201911337086 A CN 201911337086A CN 111013848 A CN111013848 A CN 111013848A
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- pressure
- ink supply
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- upper cavity
- valve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
- B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
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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)
- Nozzles (AREA)
Abstract
The invention relates to a spray head device with a function of distribution according to needs, and aims to solve the problems of low distribution precision of particles, high cell death rate and the like in the existing 3D printing technology. The sprayer device comprises a voice coil motor, a fixing plate, a first quick connector, a second quick connector, a fixing nut, a needle head, an upper cavity, a lower cavity, a constant-pressure ink supply loop, an air pressure control loop and the like. The voice coil motor is used as an execution component to control material extrusion and particle forming in the upper cavity, the constant-pressure ink supply loop is connected with the upper cavity to realize continuous supply of ink, the air pressure control loop is connected with the lower cavity to realize continuous control of air pressure, and the particles are distributed controllably and orderly under the coordination action. The invention can greatly improve the distribution precision of the particles and has important effect on the fields of drug screening, tissue organ regeneration and the like.
Description
Technical Field
The invention relates to a nozzle manufacturing technology in the field of 3D biological printing, in particular to a nozzle device with a function of distribution according to requirements.
Background
Since 2004, the increase of cardiovascular diseases is much higher than the increase of the total production value in China, and the family burden of patients with cardiovascular diseases is increasing day by day. With the accelerated progress of social aging and urbanization, cardiovascular and cerebrovascular diseases begin to spread to low-age groups, the prevalence rate of the cardiovascular and cerebrovascular diseases is increased, and reports published in 'Chinese cardiovascular disease report 2018' in 2019 show that the number of patients suffering from the cardiovascular diseases reaches 2.9 hundred million, so that effective methods and means for preventing and treating the cardiovascular diseases are developed.
The emergence of 3D bioprinting technology provides the possibility for organ regeneration, and at present, a large number of researchers begin to research 3D bioprinting technology, apply active biomaterial (including cells) printing in the field of tissue engineering and organ regeneration, and realize tissue and organ regeneration manufacturing, but because of the characteristics of poor distribution controllability of cells, low precision, etc., the quality of tissue and organ regeneration is seriously affected, it is seen that ensuring cell distribution precision in the printing process becomes the core problem of solving tissue and organ regeneration, and therefore, a nozzle device capable of effectively realizing high-precision cell particle distribution as required is urgently needed.
Disclosure of Invention
The invention aims to solve the problem that the existing extrusion type 3D biological printer nozzle cannot realize the distribution of biological particles as required, the nozzle device can realize the distribution of the biological particles as required, so that the biological particles are uniformly distributed, and the nozzle device can better protect the activity of biological materials and has the characteristics of rapidness and convenience.
In order to achieve the design purpose, the invention adopts the following design scheme:
the utility model provides a shower nozzle device with as required distribution function, its characterized in that, the shower nozzle device includes voice coil motor, the fixed plate, first quick-operation joint, second quick-operation joint, fixation nut, the syringe needle, first sealing washer, the second sealing washer, the epicoele, the cavity of resorption, the capillary, reciprocating lever air supply, the trigeminy piece, first check valve, the second check valve, first proportional valve, the second proportional valve, first solenoid valve, the second solenoid valve, first pressure sensor, the second pressure sensor, first shower nozzle, the second shower nozzle, a controller, first constant voltage ink supply unit, first pressure control device, second constant voltage ink supply unit, second pressure control device. The voice coil motor is connected with the reciprocating rod and is installed on the fixing plate through a screw, the fixing plate is connected with the upper cavity through a screw, the upper cavity and the lower cavity are matched through a small gap to keep the coaxiality requirement and are fixed through screws, the upper cavity and the lower cavity are sealed through a second sealing ring, and a second quick connector is installed on the lower cavity; the fixing plate is connected with the upper cavity through a screw, the first sealing ring is arranged between the fixing plate and the upper cavity to realize the sealing of the upper cavity, and the first quick connector is arranged on the upper cavity; the invention also comprises an air pressure control loop and a constant pressure ink supply loop for controlling the operation of the sprayer device, wherein the air pressure control loop and the constant pressure ink supply loop are composed of an air source, a triplet, a proportional valve, an electromagnetic valve and the like, the first constant pressure ink supply loop is connected with the first quick joint of the sprayer to provide stable and unchangeable pressure for the upper cavity of the sprayer, and the first pressure control loop is connected with the second quick joint of the sprayer to provide controllable pressure for the lower cavity of the sprayer to realize the control and ordered distribution of the particle size.
The spray head device with the function of distribution according to needs has the following principle of particle formation: the material in the upper cavity is in an equilibrium state, and the motion of the voice coil motor breaks the equilibrium to generate micro-droplets, and particles are formed under the action of the outer cavity continuous fluid and overcoming surface tension.
Preferably, the voice coil motor is used as an actuating mechanism of the spray head, the controllability is good, and the frequency range is 0-50 HZ.
The spray head device with the function of distribution as required is characterized in that the upper cavity and the lower cavity are positioned in a cone positioning mode and are fixed by screws.
The upper cavity of the nozzle device with the function of distribution according to requirements is supplied with ink by adopting a constant-pressure ink supply device, and the pressure is controlled to be a critical value of the extrusion pressure of the ink.
The constant-pressure ink supply loop of the upper cavity of the nozzle device with the function of distribution as required forms the constant-pressure ink supply loop under the combined action of the controller, the proportional valve, the electromagnetic valve, the pressure sensor and the like, so that the pressure in the air pressure loop is kept stable.
The sprayer device with the function of distribution as required has the advantages that the air pressure control loop of the lower cavity forms an air pressure feedback adjusting loop under the combined action of the controller, the proportional valve, the electromagnetic valve, the pressure sensor and the like, so that the controllability and the stability of the pressure in the air pressure loop are realized.
Compared with the existing 3D biological printing nozzle technology, the nozzle device with the function of distribution on demand has the following advantages:
1) the device can realize smaller distribution of biological particles.
2) The constant-pressure ink supply loop and the pressure control loop are used for realizing the distribution and the ordered distribution of the biological materials according to the requirements.
3) By effective control of both fluids, cell mortality can be reduced.
The invention has wide application range, is not only suitable for uniform distribution of cell particles, but also suitable for the medical field of drug screening and the like.
Drawings
FIG. 1 schematic view of a spray head device
FIG. 2 is a schematic cross-sectional view of a head unit
FIG. 3 is a schematic view of an automatic air pressure regulating circuit
FIG. 4 pulse signals for voice coil motor control
In fig. 1, a voice coil motor; 2. a fixing plate; 3. a first quick coupling; 4. a second quick coupling; 5. fixing a nut; 6. a needle head; 7. a first seal ring; 8. a second seal ring; 9. an upper chamber; 10. a lower cavity; 11. a capillary tube; 12. a reciprocating lever; 13. a gas source; 14. a triplet; 15. a first check valve; 16. a second one-way valve; 17. a first proportional valve; 18. a second proportional valve; 19. a first solenoid valve; 20. a second solenoid valve; 21. a first pressure sensor; 22. a second pressure sensor; 23. a first nozzle; 24. a second nozzle; 001. a first constant-pressure ink supply loop; 002. a first pressure control loop; 003. a second constant-pressure ink supply loop; 004. a second pressure control loop.
Detailed Description
To further illustrate the feasibility of the present invention, the present invention will be described in detail with reference to a schematic diagram of a showerhead arrangement.
A spray head device with a function of distribution as required is shown in figures 1 and 2 and comprises a voice coil motor (1), a fixing plate (2), a first quick joint (3), a second quick joint (4), a fixing nut (5), a needle head (6), a first sealing ring (7), a second sealing ring (8), an upper cavity (9), a lower cavity (10), a capillary tube (11) and a reciprocating rod (12), wherein the upper cavity (9) and the lower cavity (10) are matched through a small gap to keep the coaxiality requirement, the fixing is carried out through screws, the sealing is carried out through a second sealing ring (8), a second quick joint (4) is installed on a lower cavity (10), a fixing plate (2) is connected with an upper cavity (9) through screws, a first sealing ring (7) is arranged between the fixing plate (2) and the upper cavity (9) to realize the sealing of the upper cavity, and a first quick joint (3) is installed on the upper cavity (9); the voice coil motor (1) is installed on the fixing plate (2) through screws, and particles are formed by controlling the movement of the voice coil motor (1).
FIG. 3 is a diagram of a nozzle pressure regulating circuit, in which a first constant pressure ink supply circuit (001) and a first air pressure control circuit (002) are composed of an air source (13), a triplet (14), a first check valve (15), a second check valve (16), a first proportional valve (17), a second proportional valve (18), a first electromagnetic valve (19), a second electromagnetic valve (20), a first pressure sensor (21), a second pressure sensor (22), a first nozzle (23), a second nozzle (24) and a controller (25), wherein the first check valve (15), the first proportional valve (17), the first electromagnetic valve (19) and the first sensor (21) constitute the first constant pressure ink supply circuit (001), the second check valve (16), the second proportional valve (18), the second electromagnetic valve (20) and the second sensor (22) constitute the first air pressure control circuit (002), and the first constant pressure ink supply circuit (001) can control an upper chamber (9) to maintain a constant pressure state, the controllability of pressure in the lower cavity (10) can be realized by the first air pressure control loop (002), the first constant-pressure ink supply loop (001) is connected with the first quick joint (3) in the first spray head (22), the first pressure control loop (002) is connected with the second quick joint (4) in the first spray head (23), the controllable extrusion of particles is realized under the interaction of the constant-pressure ink supply loop and the pressure control loop, and after the particles are extruded, the ink is rapidly filled in the upper cavity (9) by the pressure of the first constant-pressure ink supply loop (001).
Figure 4 is a pulse signal for voice coil motor control,t 1 in order to be the time of the pulse,t 2 for the pulse interval time, the pulse time is constant under the condition that the material extrusion speed of the lower cavity (10) is constantt 1 The larger the diameter of the extruded particle, the greater the pulse intervalt 2 The longer the distance between the particles.
A sparger assembly having a demand dispensing function, wherein particles are formed in the sparger assembly by a principle comprising: the material in the upper cavity (9) is in an equilibrium state, the motion of the voice coil motor (1) breaks the equilibrium to generate particles, and the particles are formed under the action of the continuous fluid in the lower cavity (10) and overcoming the surface tension.
The spray head device with the function of distribution on demand is characterized in that the voice coil motor (1) is used as an actuating mechanism of the spray head, the controllability is good, and the frequency range is 0-50 HZ.
The spray head device with the function of distribution as required is characterized in that an upper cavity (9) and a lower cavity (10) are positioned in a cone positioning mode and fixed by screws.
The spray head device with the function of distribution on demand is characterized in that the upper cavity (9) is supplied with ink by adopting a constant-pressure ink supply loop, and the pressure value is a critical value of the extrusion pressure of the ink.
The sprayer device with the function of distribution on demand is characterized in that a controller (25) is respectively connected with a first proportional valve (17), a first electromagnetic valve (19) and a first pressure sensor (21) to form a first constant-pressure ink supply loop (001), and the first constant-pressure ink supply loop (001) is connected with an upper cavity (9) to keep the pressure in an air pressure loop stable.
The sprayer device with the function of distribution on demand is characterized in that a controller (25) is respectively connected with a second proportional valve (18), a second electromagnetic valve (20) and a second pressure sensor (22) to form a first pressure control loop (001), and the first constant-pressure ink supply loop (001) is connected with an upper cavity (9) to enable the controllability and stability of the pressure in the air pressure loop.
The sprayer device provided by the invention performs the specific steps of distributing particles according to requirements:
1) preferably, the voice coil motor (1) is used as an execution component, parts of the sprayer device are designed and manufactured, the sprayer device is built, the coaxiality of the upper cavity (9) and the lower cavity (10) is guaranteed, the sealing device is reasonably installed, and material leakage is prevented;
2) constructing a constant-pressure ink supply loop and a pneumatic control loop system, wherein the gas path system comprises a gas source, a triple piece, a proportional valve, an electromagnetic valve, a controller and the like, and constructing the constant-pressure ink supply loop and the pneumatic control loop through the gas path elements;
3) connecting the first constant-pressure ink supply loop (001) mentioned in the step 2) with the first quick joint (3), controlling the opening degree of the first proportional valve (16) through a controller (25), and finely adjusting the pressure of the fluid in the upper cavity (9) to achieve a fluid balance state;
4) connecting the first air pressure control loop (002) mentioned in 2) with the second quick joint (4) of the first spray head (22) to avoid air leakage;
5) the movement of the voice coil motor (1) in the step 1) is accurately controlled according to the requirement of particle forming, so that the particle forming is realized;
6) and 2) the proportional valve is controlled to be continuously controlled by the air pressure control loop in the air pressure control loop, so that the pressure in the lower cavity is controlled, and the uniform arrangement of particles is realized.
The invention realizes particle forming and equal-interval uniform arrangement by the combined action of a voice coil motor (1), a constant-pressure ink supply loop and an air pressure control loop, wherein the constant-pressure ink supply loop is connected with an upper spray head cavity (9), the air pressure control loop is connected with a lower spray head cavity (10), a first pressure sensor (21) and a first pressure sensor (22) are connected with a controller (25), and the controller (25) is respectively connected with a proportional valve and an electromagnetic valve.
The controller (25) receives the instruction from the pressure sensor and feeds back the instruction to control the proportional valve to regulate the opening degree; the pressure sensor measures a pressure value, converts an analog signal into a digital signal and then transmits the digital signal to the controller, and the controller analyzes pressure data to form a feedback control instruction.
The present patent is not limited to the above-mentioned embodiments, and various changes and modifications to the present patent are intended to be included within the scope of the claims and the equivalent technology of the present patent if they do not depart from the spirit and scope of the present patent.
Although terms such as the voice coil motor (1), the fixing plate (2), the first quick coupling (3), the second quick coupling (4), the fixing nut (5), the needle (6), the first sealing ring (7), the second sealing ring (8), the upper chamber (9), the lower chamber (10), the capillary tube (11), the reciprocating rod (12), the air source (13), the triple piece (14), the first check valve (15), the second check valve (16), the first proportional valve (17), the second proportional valve (18), the first solenoid valve (19), the second solenoid valve (20), the first sensor (21), the second sensor (22), the first spray head (23), the second spray head (24), the controller (25), the first constant-pressure ink supply loop (001), the first pressure control loop (002), the second constant-pressure ink supply loop (003), and the second pressure control loop (004) are used more herein, but not to exclude the possibility of other terms, which are used merely to better describe and explain the nature of the invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (7)
1. A spray head device with a function of distribution as required is characterized by comprising a voice coil motor (1), a fixing plate (2), a first quick joint (3), a second quick joint (4), a fixing nut (5), a needle head (6), a first sealing ring (7), a second sealing ring (8), an upper cavity (9), a lower cavity (10) and a capillary tube (11), wherein the upper cavity (9) and the lower cavity (10) keep the coaxiality requirement through small clearance fit, the upper cavity and the lower cavity are fixed through screws and sealed through the second sealing ring (8), the second quick joint (4) is arranged on the lower cavity (10), the lower cavity (10) and the needle head (6) are fixedly connected through the fixing nut (5), the fixing plate (2) is connected with the upper cavity (9) through the screws, the first sealing ring (7) is arranged between the fixing plate (2) and the upper cavity (9), the sealing of an upper cavity is realized, a first quick joint (3) is arranged on the upper cavity (9), a voice coil motor (1) is connected with a reciprocating rod (12) and arranged on a fixing plate (2) through a screw, a first constant-pressure ink supply loop (001) is connected with the first quick joint (3) in a first spray head (22), and a first pressure control loop (002) is connected with a second quick joint (4) in the first spray head (23).
2. A demand dispensing function sprayer apparatus as recited in claim 1, the first constant-pressure ink supply loop (001) and the first air pressure control loop (002) are composed of an air source (13), a triple piece (14), a first one-way valve (15), a second one-way valve (16), a first proportional valve (17), a second proportional valve (18), a first electromagnetic valve (19), a second electromagnetic valve (20), a first pressure sensor (21), a second pressure sensor (22), a first spray head (23), a second spray head (24) and a controller (25), the first check valve (15), the first proportional valve (17), the first electromagnetic valve (19) and the first pressure sensor (21) form a first constant-pressure ink supply loop (001), and the second check valve (16), the second proportional valve (18), the second electromagnetic valve (20) and the second pressure sensor (22) form a first air pressure control loop (002).
3. A head assembly with drop on demand capability as claimed in claim 1 wherein said upper chamber (9) is supplied with ink using a constant pressure ink supply circuit, the pressure being a threshold of the ink extrusion pressure.
4. A head assembly with on-demand dispensing function according to claim 1, wherein the controller (25) is connected to the first proportional valve (17), the first solenoid valve (19), and the first pressure sensor (21), respectively, and forms a first constant pressure ink supply circuit (001), and the first constant pressure ink supply circuit (001) is connected to the upper chamber (9).
5. A head assembly with on-demand dispensing function according to claim 1, wherein the controller (25) is connected to the second proportional valve (18), the second solenoid valve (20), and the second pressure sensor (22), respectively, and forms a first pressure control circuit (001), and the first constant pressure ink supply circuit (001) is connected to the upper chamber (9).
6. A dispensing head device with a demand dispensing function according to claim 1, characterized in that the outlet point of the lower chamber (10) is designed in a conical configuration, connected to the needle (5) and sealed.
7. A spray head device with demand distribution function according to claim 1 characterized in that the upper chamber (9) and the lower chamber (10) are positioned by means of cone positioning and are fixed by screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911337086.6A CN111013848A (en) | 2019-12-23 | 2019-12-23 | Spray head device with function of distribution according to needs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911337086.6A CN111013848A (en) | 2019-12-23 | 2019-12-23 | Spray head device with function of distribution according to needs |
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| CN111013848A true CN111013848A (en) | 2020-04-17 |
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| CN201911337086.6A Pending CN111013848A (en) | 2019-12-23 | 2019-12-23 | Spray head device with function of distribution according to needs |
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| CN109644560A (en) * | 2016-05-26 | 2019-04-16 | 迈康尼股份公司 | Method and apparatus for controlling spray distribution by displacement measurement |
| JP6594582B1 (en) * | 2019-03-14 | 2019-10-23 | 株式会社クリセル | Suspension maintenance method, suspension maintenance device, and bio 3D printer including the same |
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| CN101623678A (en) * | 2009-08-11 | 2010-01-13 | 华中科技大学 | Pneumatic diaphragm type micro-droplet jetting method and pneumatic diaphragm type micro-droplet jetting device |
| CN106073940A (en) * | 2015-05-07 | 2016-11-09 | 周惠兴 | A kind of ejecting device, baggage systems and packaging method with automatic parcel function |
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Application publication date: 20200417 |