CN114179518B - Micro-pressure electric spray head based on iris turbofan and nozzle aperture adjusting and controlling method - Google Patents

Micro-pressure electric spray head based on iris turbofan and nozzle aperture adjusting and controlling method Download PDF

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Publication number
CN114179518B
CN114179518B CN202111410677.9A CN202111410677A CN114179518B CN 114179518 B CN114179518 B CN 114179518B CN 202111410677 A CN202111410677 A CN 202111410677A CN 114179518 B CN114179518 B CN 114179518B
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iris
turbofan
driven gear
nozzle
piezoelectric
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CN114179518A (en
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宁洪龙
赵杰
姚日晖
邹文昕
付钰斌
李星林
姜雅思
熊鑫
叶倩楠
彭俊彪
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads

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  • Coating Apparatus (AREA)
  • Ink Jet (AREA)

Abstract

The invention discloses a micro-pressure electric spray head based on an iris turbofan and a nozzle aperture adjusting and controlling method. The micro-piezoelectric spray nozzle based on the iris turbofan comprises a micro motor to be driven by a driving gear, the iris turbofan meshed with the driving gear, and a piezoelectric spray nozzle arranged above the iris turbofan. The outside of the iris turbofan is meshed with the driving gear through an outer driven gear and an inner driven gear which are integrally formed. The interior of iris turbofan is through being equipped with a plurality of thin shape metal blade and the interior driven gear meshing of blade gear, and the nozzle has been adjusted to aperture size that forms after a plurality of blades overlap each other. The invention has the advantages that the aperture size of the nozzle can be flexibly adjusted, the function of spray printing with different precision sizes by using one piezoelectric spray head is realized, and the requirements of various spray printing targets are met.

Description

Micro-pressure electric spray head based on iris turbofan and nozzle aperture adjusting and controlling method
Technical Field
The invention belongs to the technical field of piezoelectric ink jet printing devices, and particularly relates to a micro-piezoelectric spray nozzle based on an iris turbofan and a nozzle aperture adjusting and controlling method.
Background
Piezoelectric ink jet printing technology, a non-contact, non-pressure, non-mask printing technology, can spray very small droplets at a desired position accurately, and a thin film is formed after a solvent is volatilized, dried and cured. The piezoelectric ink jet printing technology has the advantages of low cost, large area, environmental protection and the like, so that the technology gradually becomes a wet method for preparing microelectronic devices, such as organic electroluminescent OLED devices, color filters in LCDs, organic thin film field effect transistors, LED packages, wearable electronic devices and the like.
At present, the piezoelectric ink jet printing technology has many technical difficulties in ultra-high precision, and the key point is that the size of the nozzle is close to the limit. When the piezoelectric ink-jet printing technology is adopted to prepare the display screen with ultrahigh resolution and other equipment, an ink-jet head with extremely small diameter is required. However, the smallest diameter of the existing piezoelectric nozzle is in the micron order, printing and preparation of submicron pixels cannot be completed, and the small-size nozzle has extremely high requirements on manufacturing technology and is extremely expensive. When the spray head is kept still for a long time, the problem that the spray head is blocked easily occurs in the small-aperture spray nozzle. In addition, each nozzle size of the piezoelectric nozzle can only be applied to a single specific occasion, and once a printing target and a printing requirement are changed, the piezoelectric nozzle with the corresponding size must be replaced, so that the production efficiency is reduced.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention provides a micro-piezoelectric nozzle based on an iris turbofan, and provides a method for adjusting and controlling the diameter of a nozzle hole of the micro-piezoelectric nozzle based on the iris turbofan, so that the piezoelectric nozzle can flexibly adjust the size of the hole of an ink outlet when ejecting ink, and different ink ejecting requirements can be met.
In order to achieve the purpose, the invention adopts the following technical scheme:
a micro-piezoelectric spray head based on an iris turbofan comprises a piezoelectric spray head, the iris turbofan and a driver, wherein the iris turbofan is connected with the piezoelectric spray head;
the iris turbofan comprises a shell, an outer driven gear, an inner driven gear, a plurality of blades and a nozzle;
the top of the shell is connected with the lower end of the piezoelectric nozzle, the bottom of the shell is provided with an ink outlet, and the ink outlet is communicated with the piezoelectric nozzle;
the outer driven gear is connected with the inner driven gear; the outer driven gear and the inner driven gear are respectively movably connected with the shell; the external driven gear is meshed with the driver;
the blades are arranged on the inner side of the shell; one end of the blade is close to the inner driven gear, the other end of the blade is provided with a blade gear which is meshed with the inner driven gear and a rotating hole which is movably connected with the shell, and the blade rotates around the rotating hole in parallel with the top of the shell; the other end of the blade faces the central axis of the iris turbofan, adjacent blades overlap each other at the one end, and a plurality of blades overlapping each other form a nozzle around the central axis of the iris turbofan at the one end.
Preferably, the blades are arc-shaped thin metal sheets, and adjacent blades are overlapped with each other on one side close to the central axis of the iris turbofan.
Further, the edge of the blade close to the central axis of the iris turbofan is curved.
Furthermore, the radian of the edge curve of each blade on one side close to the central axis of the iris turbofan is equal.
Further, the number of blades is 6 to 18.
Preferably, the iris turbofan further comprises a rivet; the rivet penetrates through the rotating hole of the blade and is movably connected with the blade; both ends of the rivet are respectively connected with the top and the bottom of the shell.
Preferably, the outer driven gear and the inner driven gear are integrally formed into a circular ring shape, the outer side of the circular ring is the outer driven gear, the inner side of the circular ring is the inner driven gear, a smooth groove is formed between the inner side and the outer side of the circular ring, and the smooth groove is connected with the shell.
Further, the shell comprises a liquid path connector, a top plate and a bottom plate; the top plate is provided with a downward convex sheet circular upper slideway, the upper slideway is embedded with the smooth groove, and/or the bottom plate is provided with an upward convex sheet circular lower slideway, and the lower slideway is embedded with the smooth groove; the integrally formed outer driven gear and the inner driven gear rotate by being embedded between the upper slideway and/or the lower slideway; the liquid path connector is respectively connected with the middle part of the top plate and the lower end of the piezoelectric nozzle.
Preferably, the driver includes a micro-motor and a drive gear; the micromotor is connected with the driving gear, and the driving gear is meshed with the external driven gear.
A nozzle aperture adjusting and controlling method of a micro-piezoelectric nozzle based on the iris turbofan comprises the following steps in sequence:
the micro motor is connected with a power supply and receives a driving signal sent from the outside;
the micro motor rotates according to the driving signal to drive the driving gear to rotate a certain angle in the anticlockwise direction or the clockwise direction;
the driving gear transmits power from the outer driven gear to the inner driven gear, and the inner driven gear rotates for a certain angle in the opposite direction of the previous step;
the inner driven gear drives all the blade gears to drive all the blades to rotate through the same angle in the same direction as the rotating direction in the previous step, and the contraction or expansion of the nozzle is controlled by all the blades, so that the aperture size of the nozzle is controlled.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The power transmission part adopts a combined technical scheme of meshing the micromotor and the gear, and can drive the micromotor by applying an external control signal so as to realize accurate angle positioning of the driving gear driving the driven gear to rotate and avoid the problems of complicated operation and errors caused by manual regulation and control;
(2) According to the nozzle hole part, the blades made of a plurality of overlapped arc-shaped thin metals are tightly attached to obtain a circular aperture, and the rotating directions and angles of the blades are further controlled, so that the effect of flexibly regulating and controlling the size of the nozzle is achieved, the printing requirements of different targets can be met, and the jet printing efficiency is improved;
(3) The combination of a plurality of blades supports bidirectional clutch, so that the nozzle can be reduced, and the nozzle hole can be enlarged in the opposite direction to solve the problems of nozzle blockage and difficulty in cleaning;
(4) The piezoelectric nozzle can be designed to be detachably connected with the liquid path connector and the iris turbofan, so that the function of convenient replacement is realized.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a micro-piezoelectric nozzle based on an iris turbofan;
FIG. 2 is a schematic structural view of the micro-piezoelectric nozzle of FIG. 1;
FIG. 3 is a schematic view of the driving wheel and the iris turbofan shown in FIG. 1;
FIG. 4 is a schematic view of the overall structure of the iris turbofan shown in FIG. 3;
FIG. 5 is a schematic view of the internal structure of the iris turbofan shown in FIG. 3;
FIG. 6 is a schematic view of the blade configuration of FIG. 3;
FIG. 7 is a partially exploded view of the outer structure of the iris turbofan of FIG. 3;
FIG. 8 is a flow chart of a nozzle aperture control method of the iris turbofan based micro-piezoelectric nozzle of FIG. 1;
in the figure: 1-a first fixing plate, 2-a second fixing plate, 3-a bolt, 4-a nut, 5-a micro motor, 6-a control line, 7-a rotating shaft, 8-a driving gear, 9-a piezoelectric nozzle, 10-an ink conveying pipe, 11-an electrode wire, 12-an iris turbofan, 13-a liquid path connector, 14-a bottom plate, 15-an ink outlet, 16-a gear meshing end, 17-an outer driven gear, 18-a top plate, 19-a slideway, 20-an inner driven gear, 21-a nozzle, 22-a rivet, 23-a blade, 24-a blade gear, 25-a rotating hole, 26-a smooth groove, 27-an upper slideway and 28-a lower slideway.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the present disclosure, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present disclosure.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item appearing before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
Examples
As shown in fig. 1-7, the micro-piezoelectric nozzle based on the iris turbofan of the present embodiment includes a fixing frame, a micro-motor 5, a piezoelectric nozzle 9, and an iris turbofan 12.
The fixing frame is composed of a first fixing plate 1, a second fixing plate 2, a bolt 3 and a nut 4. The first fixing plate 1 and the second fixing plate 2 are respectively square plates, the first fixing plate 1 and the second fixing plate 2 are arranged in parallel, and the first fixing plate 1 and the second fixing plate 2 are respectively provided with an embedded part matched with the bolt 3, the micromotor 5 and the piezoelectric nozzle 9. The upper and lower parts of the micro-motor 5 and the piezoelectric nozzle 9 are respectively embedded in the first fixing plate 1 and the second fixing plate 2. The bolt 3 and the nut 4 are detachably connected with the first fixing plate 1 and the second fixing plate 2 through screw thread matching.
The micro-motor 5 is connected with a control line 6, and the micro-motor 5 receives an external control signal and a power supply through the control line 6. The end of the rotating shaft 7 of the micromotor 5 is coaxially connected with a driving gear 8. The micromotor 5 and the driving gear 8 constitute a drive.
The upper end of the piezoelectric nozzle 9 is provided with an ink conveying pipe 10 and an electrode wire 11, the ink conveying pipe 10 is used for conveying jet printing materials, and the electrode wire 11 is used for controlling the jet process of the jet printing materials.
The iris turbofan 12 is connected to the lower end of the piezoelectric nozzle 9, and the iris turbofan 12 is a cylinder having an approximately flat shape as a whole. The iris turbofan 12 is in threaded connection with the piezoelectric nozzle 9 through a liquid path connector 13, and the iris turbofan, the piezoelectric nozzle and the piezoelectric nozzle are in coaxial connection. The outer diameter of the lower end of the piezoelectric nozzle 9 is equal to the inner diameter of the liquid path connector 13, the diameters of the piezoelectric nozzle and the liquid path connector are both 1-5 mm, and the inner diameter of the lower end of the piezoelectric nozzle 9 is 20-200 microns;
the outer part of the iris turbofan 12 is provided with a liquid path connector 13, a top plate 18 and a bottom plate 14 which are connected with each other from top to bottom in sequence, and the liquid path connector 13, the top plate 18 and the bottom plate 14 are respectively provided with a through path which is communicated with the inner part of the piezoelectric nozzle 9 so that the jet printing material in the piezoelectric nozzle 9 can pass through the through paths. The liquid path connector 13 is coaxially and threadedly connected with the top plate 18.
The outer part of the iris turbofan 12 comprises a top plate 18, a bottom plate 14 and a slide way 19 between the top plate and the bottom plate, wherein an outer driven gear 17 and an inner driven gear 20 are nested on the slide way 19, the outer driven gear 17 and the inner driven gear 20 are integrally formed, and can slide on the slide way 19 to perform circumferential rotation; the external driven gear 17 is provided outside the iris turbofan 12, and the internal driven gear 20 is provided inside the iris turbofan 12. The external driven gear 17 is engaged with the driving gear 8 at the gear engaging end 16 for power transmission. An ink outlet 15 is arranged in the middle of the bottom plate 14 and is coaxial with the piezoelectric nozzle 9. The outer driven gear 17 and the inner driven gear 20 are integrally formed and are in the shape of a circular ring, the inner driven gear 20 and the outer driven gear 17 are respectively arranged on the inner side and the outer side of the circular ring, and two smooth grooves 26 which are symmetrically arranged up and down are formed in the part between the inner side and the outer side of the circular ring. The top plate 18 extends downwards to form an upper thin-ring-shaped slide way 27, the bottom plate 14 extends upwards to form a lower thin-ring-shaped slide way 28, and the upper slide way 27 and the lower slide way 28 are respectively matched with the smooth grooves 26 at the upper part and the lower part, so that the integrally formed outer driven gear 17 and the inner driven gear 20 can rotate around the axis of the iris turbofan 12 in a circular manner. The liquid path connector 13, the top plate 18 and the bottom plate 14 form a shell of the iris turbofan 12.
The iris turbofan 12 includes a nozzle 21, a rivet 22, and a plurality of blades. The number of the blades 23 may be set to 6 to 18. The side of the blade 23 close to the central axis is in the shape of a curved knife. Each of the blades 23 is provided with a blade gear 24 at a position interconnecting the inner driven gear 20, and the inner driven gear 20 is engaged with the blade gear 24. Each vane 23 is provided with a rotary hole 25 at an end adjacent to the vane gear 24. The rivet 22 is arranged on the circumference close to the inner part of the iris turbofan 12; the rivet 22 is interconnected with the top plate 18 and the bottom plate 14 through the rotation hole 25, respectively, and the blade 23 is rotated around the rivet 22 through the rotation hole 25 in a certain angle and direction. The edge of each blade 23 at the position facing the central axis of the iris turbofan 12 is set to be in the shape of the same radian curve, each adjacent blade 23 is an arc-shaped thin metal sheet which is mutually overlapped, the curve and the radian of the appearance of each blade are the same, the overlapped blades 23 form a nozzle 21 with the adjustable aperture size at the position facing the central axis of the iris turbofan 12, and the shape of the nozzle 21 is smoother as the number of the blades 23 is larger; the aperture size of the nozzle 21 is limited to a range smaller than the diameter size of the ink outlet position at the lower end of the piezoelectric head 9. When the driving gear 8 rotates along a certain direction, the driving gear can drive the inner driven gear 20 to rotate in the opposite direction, the inner driven gear 20 can drive the plurality of blades 23 to rotate along the same direction, so that the blades 23 can be separated from or close to the axial line position of the iris turbofan 12, and the separation and reunion of the blades 23 can change the aperture size of the nozzle 21; the diameter of the nozzle 21 is adjusted between 0 and 200 microns. The ratio of the reference circle diameter between the blade gear 24 and the internal driven gear 10 is 1:8 and the tooth heights are the same.
With reference to fig. 1 to 7, a method for controlling a nozzle aperture of a micro-piezoelectric nozzle based on an iris turbofan is shown in fig. 7, and the method includes the steps of:
s1, a control line 6 is connected to an external driving signal sending device and a power supply to switch on the power supply for the micro motor 5, and meanwhile, a driving signal sent by the external driving signal sending device is received;
s2, a control line 6 transmits a driving signal to the micro motor 5, and a rotating shaft 7 of the micro motor 5 rotates according to the driving signal to drive a driving gear 8 to rotate by a certain angle theta in the anticlockwise direction or the clockwise direction 1 ；
S3, rotating the driving gear 8 by an angle theta 1 Thereafter, power is transmitted from the external driven gear 17 to the internal driven gear 20, and the internal driven gear 20 is rotated by a certain angle θ in the opposite direction to that in step S2 2 ；
S4, the inner driven gear 20 rotates by an angle theta 2 Thereafter, all the blade gears 24 are driven to drive all the blades 23 while rotating through the same angle in the same direction as the rotating direction in step S3θ 3 The contraction or expansion of the nozzle 21 is controlled by all the vanes 23, thereby realizing the control of the size of the aperture of the nozzle 21 in accordance with an external drive signal.
Compared with the prior art, the micro-piezoelectric spray head based on the iris turbofan and the nozzle aperture adjusting and controlling method have the advantages that: the power transmission part adopts a mode that the micromotor 5 drives the gears which are meshed with each other, so that the accurate angle positioning of the driving gear 8 driving the driven gear to rotate is realized, and the problems of complex operation and errors caused by manual regulation and control are avoided; in the part of the nozzle 21, a plurality of mutually overlapped arc-shaped thin metal blades 23 are tightly attached to obtain a circular aperture, and further, the rotating direction and the angle of the plurality of blades 23 are controlled, so that the effect of flexibly regulating and controlling the size of the nozzle 21 is achieved, the printing requirements of different targets can be met, and the jet printing efficiency is improved; the combination of a plurality of blades supports bidirectional clutch, which can not only reduce the nozzle 21, but also enlarge the nozzle 21 in the opposite direction to solve the problems of nozzle blockage and difficult cleaning; the piezoelectric nozzle 9 is detachably connected with the iris turbofan 12 through the liquid path connector 13, so that the function of convenient replacement is realized.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. The micro-piezoelectric spray head based on the iris turbofan comprises a piezoelectric spray head, and is characterized by further comprising the iris turbofan and a driver, wherein the iris turbofan is connected with the piezoelectric spray head;
the iris turbofan comprises a shell, an outer driven gear, an inner driven gear, a plurality of blades and a nozzle;
the top of the shell is connected with the lower end of the piezoelectric nozzle, the bottom of the shell is provided with an ink outlet, and the ink outlet is communicated with the piezoelectric nozzle;
the outer driven gear is connected with the inner driven gear; the outer driven gear and the inner driven gear are respectively movably connected with the shell; the external driven gear is meshed with the driver;
the blades are arranged on the inner side of the shell; one end of the blade is close to the inner driven gear, the other end of the blade is provided with a blade gear which is meshed with the inner driven gear and a rotating hole which is movably connected with the shell, and the blade rotates around the rotating hole in parallel with the top of the shell; the other end of the blades faces the central axis of the iris turbofan, adjacent blades overlap each other at the one end, and a plurality of overlapping blades form a nozzle around the central axis of the iris turbofan at the one end.
2. The iris turbofan-based micro-piezoelectric nozzle as claimed in claim 1, wherein the blades are arc-shaped thin metal sheets, and adjacent blades are overlapped with each other at a side close to a central axis of the iris turbofan.
3. The iris turbofan-based micro-piezoelectric nozzle as claimed in claim 2, wherein the blade has a curved shape at an edge thereof on a side close to a central axis of the iris turbofan.
4. The iris turbofan-based micro-piezoelectric nozzle as claimed in claim 3, wherein each blade has an equal curvature of its edge at a side closer to a central axis of the iris turbofan.
5. The iris turbofan-based micro piezoelectric nozzle as claimed in claim 4, wherein the number of the blades is 6 to 18.
6. The iris turbofan-based micro-piezoelectric nozzle as claimed in claim 1, wherein the iris turbofan further comprises a rivet; the rivet penetrates through the rotating hole of the blade and is movably connected with the blade; both ends of the rivet are respectively connected with the top and the bottom of the shell.
7. The micro-piezoelectric injector head based on the iris turbofan of claim 1, wherein the outer driven gear and the inner driven gear are integrally formed in a circular ring shape, the outer side of the circular ring is the outer driven gear, the inner side of the circular ring is the inner driven gear, a smooth groove is formed between the inner side and the outer side of the circular ring, and the smooth groove is connected with the housing.
8. The iris turbofan-based micro-piezoelectric nozzle of claim 7 wherein the housing includes a fluid path connector, a top plate and a bottom plate; the top plate is provided with an upper sliding way in a downward convex slice ring shape, the upper sliding way is embedded with the smooth groove, and/or the bottom plate is provided with a lower sliding way in a upward convex slice ring shape, and the lower sliding way is embedded with the smooth groove; the integrally formed outer driven gear and the inner driven gear rotate by being embedded between the upper slideway and/or the lower slideway; and the liquid path connector is respectively connected with the middle part of the top plate and the lower end of the piezoelectric nozzle.
9. The iris turbofan-based micro-piezoelectric nozzle as claimed in claim 1, wherein the driver includes a micro motor and a driving gear; the micromotor is connected with the driving gear, and the driving gear is meshed with the external driven gear.
10. The method for regulating the nozzle aperture of an iris turbofan-based micro piezoelectric nozzle according to any one of claims 1 to 9, comprising the steps of:
the micro motor is connected with a power supply and receives a driving signal sent from the outside;
the micro motor rotates according to the driving signal to drive the driving gear to rotate a certain angle in the anticlockwise direction or the clockwise direction;
the driving gear transmits power from the outer driven gear to the inner driven gear, and the inner driven gear rotates for a certain angle in the opposite direction of the previous step;
the inner driven gear drives all the blade gears to drive all the blades to rotate through the same angle in the same direction as the rotating direction in the previous step, and the contraction or expansion of the nozzle is controlled by all the blades, so that the aperture size of the nozzle is controlled.
CN202111410677.9A 2021-11-25 2021-11-25 Micro-pressure electric spray head based on iris turbofan and nozzle aperture adjusting and controlling method Active CN114179518B (en)

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US6712453B2 (en) * 1997-07-15 2004-03-30 Silverbrook Research Pty Ltd. Ink jet nozzle rim
KR20060020863A (en) * 2004-09-01 2006-03-07 삼성전자주식회사 Laser scanning unit capable of correcting a variation of focal length due to a variation of temperature
CN106541569B (en) * 2015-11-28 2019-05-14 华南理工大学 A kind of FDM type 3D printing spray head and method based on colour mixture and dyeing theory
CN105881898B (en) * 2016-04-05 2018-04-10 北京恒创增材制造技术研究院有限公司 A kind of new type colorful printing head
CN206644337U (en) * 2016-10-14 2017-11-17 衢州学院 A kind of 3D printing shower nozzle of imitative iris adjustable nozzle bore
CN110370648B (en) * 2019-07-03 2020-07-28 西安交通大学 Multichannel piezoelectric type 3D printing nozzle fault identification and state monitoring system and method
CN110296610A (en) * 2019-07-26 2019-10-01 福建农林大学 Iris formula variable cross section guiding device and its working method

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