CN107498848A - A kind of 3D printing flexible spray head and its regulate and control method online - Google Patents
A kind of 3D printing flexible spray head and its regulate and control method online Download PDFInfo
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- CN107498848A CN107498848A CN201710609333.8A CN201710609333A CN107498848A CN 107498848 A CN107498848 A CN 107498848A CN 201710609333 A CN201710609333 A CN 201710609333A CN 107498848 A CN107498848 A CN 107498848A
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- shower nozzle
- flow
- flow control
- plug bar
- discharging
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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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- 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
Abstract
A kind of 3D printing flexible spray head and its regulate and control method online, belong to 3D printing technique field.It is characterized in that flexible spray head is made up of shower nozzle, shower nozzle top cover, feed pipe, material inlet valve, gas pipeline, pressure regulating valve, flow control plug bar, flow control plug bar drive mechanism；No additional power discharging is realized using flow control plug bar to be combined with additional power discharging, ensure that the continuous online accuracy controlling of discharging flow.It is an advantage of the invention that, the tapping channel pore size modification scope of shower nozzle is wide, tapping channel bottom shape is always circular, discharging flow can on-line continuous regulates and controls, simple in construction, flexibility is good, liquid material is not easy to remain, and helps to lift the forming efficiency and printing precision of 3D printing product.
Description
Technical field
The invention belongs to 3D printing technique field, and in particular to a kind of 3D printing flexible spray head and its regulate and control method online.
Technical background
3D printing technique is a kind of new material forming technique to grow up the 1980s, has production procedure
Short, the features such as stock utilization is high, mainly include Stereolithography technology, precinct laser sintering technology, precinct laser at present and melt
Change technology, adhesive spray forming technology, fusion sediment technology and droplet ejection forming technique etc..Wherein, Stereolithography,
The technology such as precinct laser sintering and precinct laser fusion be by control light beam according to planning forming path scan raw material,
And then realize the three-dimensional of product；And the technology such as adhesive injection, fusion sediment and droplet ejection shaping is typically to utilize
Shower nozzle sprays liquid material according to certain forming path, and then realizes the three-dimensional of product.In adhesive injection, melting
, it is necessary to be carried out to shower nozzle tapping channel pore size during the discharging of 3D printing technique such as deposition and droplet ejection shaping
Line regulates and controls, and the region of different shape size is formed using the liquid stream of different-diameter and flow, so as to improve beating for product
Print precision and forming efficiency.
At present, the online control technique of shower nozzle tapping channel pore size is primarily present following two problems：
(1) shower nozzle tapping channel pore size is limited by shower nozzle discharge method, causes shower nozzle tapping channel pore size
It can not regulate and control on a large scale.
The discharge method of shower nozzle is broadly divided into no additional power discharging and additional power discharges two kinds.Discharged without additional power
It is under conditions of without additional power, is discharged by the gravity of liquid material itself.Under this discharge method, shower nozzle
Critical minimum dimension be present in tapping channel aperture.When less than critical minimum dimension, liquid material can not be from shower nozzle tapping channel
Middle outflow.This discharge method is suitable only for obtaining diameter and the larger liquid stream of flow, and is unfavorable for obtaining diameter and flow is smaller
Liquid stream.Additional power discharging be under conditions of having additional power, using external force by liquid material from shower nozzle tapping channel
Extrusion.Under this discharge method, there is critical maximum size in the tapping channel aperture of shower nozzle.When higher than critical maximum size
When, liquid material uncontrollably will persistently flow out from shower nozzle tapping channel.This discharge method be suitable only for obtain diameter and
The less liquid stream of flow, and be unfavorable for obtaining diameter and the larger liquid stream of flow.
(2) tapping channel bottom shape is still had when shower nozzle tapping channel pore size regulates and controls online to be remained
Circular and discharging flow can not on-line continuous regulation and control the problems such as.
The online control methods of shower nozzle tapping channel pore size are broadly divided into pantography and the class of replacing method two.Pantography is
The nozzle of polygon is shaped as by rotating the discharging opening below shower nozzle feeding pipe in print procedure, it is defeated to change shower nozzle
The overlapping area of pipe material and nozzle discharge hole, realize the regulation and control to shower nozzle tapping channel pore size.Such method can not protect
Card shower nozzle tapping channel bottom shape is always circular so that shower nozzle produces different printings during being moved to different directions
Line footpath, influence to print the uniformity of line footpath.Replacing method is by being changed in print procedure below shower nozzle feeding pipe
The different nozzle of discharging opening diameter, realizes the regulation and control to shower nozzle tapping channel pore size.Such method can not realize that shower nozzle goes out
The continuous regulation and control of stream amount, and nozzle structure is complicated, flexibility is poor.Also, two class shower nozzle tapping channel pore sizes above
Regulation and control method is that nozzle is placed in the outside of shower nozzle feeding pipe, during shower nozzle tapping channel pore size regulates and controls,
Liquid material is easily remained in the gap between nozzle and nozzle and shower nozzle feeding pipe, and is dripped in follow-up print procedure
Fall, influence the printing precision of product.
Therefore, exploitation discharging access opening footpath size control scope is wide, tapping channel bottom shape is always circular, reactor effluent stream
Amount can on-line continuous regulation and control, simple in construction, flexibility is good, liquid material is not easy the shower nozzle that remains, for lifting 3D printing product
Forming efficiency and printing precision, there is very urgent and important meaning.
The content of the invention
The present invention is directed to tapping channel pore size modification scope existing for shower nozzle in current 3D printing technique and is limited, discharges
Channel bottom shape can not remain that circular, discharging flow can not on-line continuous regulation and control, complicated, very flexible and liquid
The problems such as state raw material easily remains, develop a kind of flow control plug bar using special shape realize without additional power discharging with
Additional power discharging is combined, and the flexible spray head that discharging flow continuously can regulate and control online.Wherein, the discharging opening of shower nozzle bottom
Bottom with flow control plug bar is back taper design, and to be provided with a diameter less at the center of flow control plug bar bottom
Discharge opening, so as to which smaller discharge opening sprays from flow control plug bar bottom under gas pressure and liquid material exists by liquid material
Be combined in the presence of gravity from the outflow of the larger discharging opening in shower nozzle bottom, solve shower nozzle tapping channel pore size modification scope by
The shortcomings that limit；Shower nozzle discharging opening bottom and flow control plug bar discharge opening bottom are circle, it is ensured that shower nozzle tapping channel bottom
Portion's shape is always circular；In addition, by controlling flow to control the relative distance between stopper rod bottom and shower nozzle discharging opening bottom
With the size of air pressure in shower nozzle realize respectively under gravity discharging condition with pneumatic discharging condition, the online of shower nozzle discharging flow connects
Continuous regulation and control；Meanwhile flow control plug bar is located inside shower nozzle, simplifies nozzle structure, it is big to solve shower nozzle tapping channel aperture
The problem of liquid material easily remains during small regulation and control.
A kind of 3D printing flexible spray head, it is characterised in that the flexible spray head is by flow control plug bar drive mechanism, feed pipe
Road, material inlet valve, shower nozzle top cover, flow control plug bar, shower nozzle, pressure regulating valve and gas pipeline group into.Described shower nozzle is used for
Liquid material is contained, its underpart is provided with a back taper discharging opening, and a diameter of liquid material of discharging opening bottom is only in gravity
1~10 times of the lower cut off diameter that can be flowed out from the discharging opening of described shower nozzle bottom of effect；Described shower nozzle top cover is located at
Above described shower nozzle, and mutually sealed with described shower nozzle, for installing described feed pipe, described gas pipeline and institute
The flow control plug bar stated；Described feed pipe enters through described shower nozzle top cover in described shower nozzle, its outer wall and institute
The shower nozzle top cover stated mutually seals, for adding liquid material into described shower nozzle；Described material inlet valve is installed on described
On feed pipe, for closing and opening described feed pipe；Described gas pipeline enters through described shower nozzle top cover
In described shower nozzle, its outer wall mutually seals with described shower nozzle top cover, for being filled with the gas of certain pressure into described shower nozzle
Body, the pressure for being filled with gas are discharged by discharging speed, the physical property of liquid material and described flow control plug bar bottom
The diameter in hole together decides on；Described pressure regulating valve is installed on described gas pipeline, for controlling gas in described shower nozzle
The size of pressure；Described flow control plug bar enters through described shower nozzle top cover in described shower nozzle, and with described shower nozzle
The discharging opening of bottom keeps centering, and its underpart is back taper, for blocking and opening the discharging opening of described shower nozzle bottom, together
When, the center of described flow control plug bar bottom is provided with a cylindrical discharge opening, and a diameter of liquid material of discharge opening
0.1~1 times of the cut off diameter that can not be flowed out under gravity from the discharge opening of described flow control plug bar bottom；It is described
Flow control plug bar drive mechanism above described flow control plug bar, for controlling described flow control plug bar
Lower motion, realize that the blocking to the discharging opening of described shower nozzle bottom and unlatching and the online of described shower nozzle discharging flow connect
Continuous regulation and control.
Further, the type of drive of described flow control plug bar drive mechanism is that motor drives or electromagnetic mechanism drives
It is dynamic.
Further, the liquid material in described shower nozzle is that adhesive or plastic melt or paraffin melt or metal melt
Body.
Further, described shower nozzle exterior circumferential is mounted with heater, to the temperature of liquid material in described shower nozzle
Regulated and controled.
A kind of online regulation and control method using 3D printing flexible spray head as described above, it is characterised in that by described spray
Head top cap is sealed in above described shower nozzle, passes through the flow control plug described in described flow control plug bar driving mechanisms control
Bar blocks the discharging opening of described shower nozzle bottom, opens described material inlet valve, by described feed pipe to described
Load liquid material in shower nozzle, its initial liquid height is 30~100mm；Pass through described flow control plug bar drive mechanism control
The described flow control plug bar of system opens the discharging opening of described shower nozzle bottom, makes liquid material under gravity, from institute
The discharging opening for the shower nozzle bottom stated is flowed out with thick cylindrical flow, and described shower nozzle is gone out by described flow control plug bar
Stream amount is continuously regulated and controled；Liquid material is supplemented into described shower nozzle by described feed pipe during discharging,
The stabilization of liquid material liquid level is kept, so as to obtain the big liquid stream that flow can continuously regulate and control；Then described flow is passed through
Control the flow control plug bar described in stopper rod driving mechanisms control to block the discharging opening of described shower nozzle bottom, pressure is higher than institute
5~the 50kPa of shower nozzle external ambient air pressure stated gas is filled with by described gas pipeline in described shower nozzle, makes liquid former
Material under the influence of air pressure, is sprayed, and pass through institute from the discharge opening of described flow control plug bar bottom with thin cylindrical flow
The pressure regulating valve stated continuously is regulated and controled to described shower nozzle discharging flow, so as to obtain the small liquid stream that flow can continuously regulate and control；
Change the air pressure in described shower nozzle finally by described pressure regulating valve, make described shower nozzle inner and outer air pressure equal, institute can be made
Liquid material in the shower nozzle stated stops spraying.
Further, the present invention by adjust described flow control plug bar bottom and described shower nozzle discharging opening bottom it
Between relative distance and shower nozzle in the size of air pressure on-line continuous regulation and control are carried out to described shower nozzle discharging flow respectively, work as institute
When the flow control plug bar stated blocks the discharging opening of described shower nozzle bottom, described flow control plug bar passes through its middle and upper part
Inverted cone-shaped structure formed and seal with described shower nozzle top cover, prevent gas in described shower nozzle from described flow control plug
Escaped in gap between bar and described shower nozzle top cover.
The present invention has the advantage that：
1.3D prints flexible spray head and flows out liquid material from the larger discharging opening of shower nozzle lower diameter under gravity
Organically combined with being sprayed under the effect of the external force such as air pressure from the less discharge opening of flow control plug bar lower diameter, solve shower nozzle
The shortcomings that tapping channel pore size modification scope is limited, expands the diameter of obtained liquid stream and the modification scope of flow.
It is circle that 2.3D, which prints flexible spray head discharging opening bottom and flow control plug bar discharge opening bottom, it is ensured that spray
Head tapping channel bottom shape is always circular so that there is shower nozzle identical to print line footpath when being moved to different directions, improve
The printing uniformity and precision of product.
3.3D printing flexible spray head flow control plug bar be located inside shower nozzle, and the switching of tapping channel pore size and
The regulation and control of shower nozzle discharging flow are realized by flow control plug bar, simplify nozzle structure, solve shower nozzle tapping channel hole
The problem of liquid material easily remains during the size control of footpath, improve the printing precision of product.
4.3D printing flexible spray heads regulate and control method respectively by controlling flow to control stopper rod bottom and shower nozzle discharging opening online
Air pressure in the relative distance and shower nozzle of bottom goes out to shower nozzle bottom discharging opening and flow control plug bar bottom discharge opening
Stream amount carries out on-line continuous regulation and control, and regulation and control flexibility ratio is high, and shaping applicability is wide.
Brief description of the drawings
Fig. 1 is the 3D printing flexible spray head of the present invention and the close-up schematic view of shower nozzle bottom tapping channel.Wherein, 1
For flow control plug bar drive mechanism, 2 be feed pipe, and 3 be material inlet valve, and 4 be shower nozzle top cover, and 5 be flow control plug bar, 6
It is pressure regulating valve for shower nozzle, 7,8 be gas pipeline.
Embodiment
The present invention is specifically described with reference to embodiments, it is necessary to it is pointed out here that be that the present embodiment is served only for pair
The present invention is further described, it is impossible to is interpreted as limiting the scope of the invention, the those of skill in the art in the field can
To make some nonessential modifications and adaptations according to the content of the invention described above.
The 3D printing flexible spray head of the present invention is described as follows with reference to accompanying drawing 1：
3D printing flexible spray head is by flow control plug bar drive mechanism (1), feed pipe (2), material inlet valve (3), shower nozzle
Top cover (4), flow control plug bar (5), shower nozzle (6), pressure regulating valve (7), gas pipeline (8) composition.Shower nozzle (6) is used to contain liquid
State raw material, its underpart is provided with a back taper discharging opening, and a diameter of liquid material of discharging opening bottom is only under gravity
1~10 times of the cut off diameter that can be flowed out from the discharging opening of shower nozzle (6) bottom；Shower nozzle top cover (4) is located above shower nozzle (6),
And mutually sealed with shower nozzle (6), for installing feed pipe (2), gas pipeline (8) and flow control plug bar (5)；Feed pipe
(2) enter through shower nozzle top cover (4) in shower nozzle (6), its outer wall mutually seals with shower nozzle top cover (4), for being added into shower nozzle (6)
Liquid material；Material inlet valve (3) is installed on feed pipe (2), for closing and opening feed pipe (2)；Gas pipeline (8)
Enter through shower nozzle top cover (4) in shower nozzle (6), its outer wall mutually seals with shower nozzle top cover (4), for being filled with one into shower nozzle (6)
The gas of constant-pressure, the pressure of gas is filled with by under discharging speed, the physical property of liquid material and flow control plug bar (5)
The diameter of portion's discharge opening together decides on；Pressure regulating valve (7) is installed on gas pipeline (8), for controlling shower nozzle (6) interior air pressure
Size；Flow control plug bar (5) enters in shower nozzle (6) through shower nozzle top cover (4), and is kept with the discharging opening of shower nozzle (6) bottom
Centering, its underpart are back taper, for blocking and opening the discharging opening of shower nozzle (6) bottom, meanwhile, under flow control plug bar (5)
The center in portion is provided with a cylindrical discharge opening, and a diameter of liquid material of discharge opening under gravity can not be from flow control
0.1~1 times of the cut off diameter of the discharge opening outflow of stopper rod (5) bottom processed；Flow control plug bar drive mechanism (1) is located at flow
Control above stopper rod (5), for controlling flow to control stopper rod (5) to move up and down, realize to the stifled of the discharging opening of shower nozzle (6) bottom
Plug and the regulation and control of the on-line continuous of unlatching and shower nozzle (6) discharging flow.
Further, the type of drive of flow control plug bar drive mechanism (1) is that motor drives or electromagnetic mechanism drives.
Further, the liquid material in shower nozzle (6) is adhesive or plastic melt or paraffin melt or metal bath.
Further, shower nozzle (6) exterior circumferential is mounted with heater, and the temperature of shower nozzle (6) interior liquid material is controlled
System.
Embodiment 1：
When liquid level is 100mm, fine copper melt only under gravity can not be from flow control plug bar (5) bottom
The cut off diameter of discharge opening outflow is 0.4mm, therefore, selects a diameter of 4mm of shower nozzle (6) bottom discharging opening, selects flow control
A diameter of 0.4mm of stopper rod (5) bottom processed discharge opening.Shower nozzle top cover (4) is sealed in above shower nozzle (6), controlled by flow
Stopper rod drive mechanism (1) control flow control stopper rod (5) blocks the discharging opening of shower nozzle (6) bottom, opens material inlet valve (3),
Fine copper melt is loaded into shower nozzle (6) by feed pipe (2), its initial liquid height is 100mm；Pass through flow control plug bar
Drive mechanism (1) control flow control stopper rod (5) opens the discharging opening of shower nozzle (6) bottom, makes effect of the fine copper melt in gravity
Under, flowed out from the discharging opening of shower nozzle (6) bottom with thicker cylindrical flow, and according to printing demand, change flow control plug
Relative distance between bar (5) bottom and the discharging opening bottom of shower nozzle (6), realize the continuous regulation and control to shower nozzle (6) discharging flow；
Fine copper melt is supplemented into shower nozzle (6) by feed pipe (2) during discharging, keeps the steady of fine copper melt liquid level height
It is fixed, so as to obtain the liquid stream being relatively large in diameter that flow can continuously regulate and control；Then controlled by flow control plug bar drive mechanism (1)
Flow control plug bar (5) blocks the discharging opening of shower nozzle (6) bottom, and pressure is higher than to shower nozzle (6) external ambient air pressure 5kPa gas
Body is filled with shower nozzle (6) by gas pipeline (8), makes fine copper melt under the influence of air pressure, from flow control plug bar (5) bottom
Discharge opening sprayed with thinner cylindrical flow, and according to printing demand, regulation pressure regulating valve (7), change in shower nozzle (6)
The size of air pressure, the continuous regulation and control to shower nozzle (6) discharging flow are realized, it is less so as to obtain the diameter that flow can continuously regulate and control
Liquid stream；Change the air pressure in shower nozzle (6) finally by pressure regulating valve (7), make shower nozzle (6) inner and outer air pressure equal, shower nozzle (6) can be made
Interior fine copper melt stops spraying.
Embodiment 2：
When liquid level is 100mm, melt only under gravity can be from flow control plug bar (5) bottom
The cut off diameter of discharge opening outflow is 1.2mm, therefore, selects a diameter of 1.2mm of shower nozzle (6) bottom discharging opening, selects flow
Control a diameter of 0.12mm of stopper rod (5) bottom discharge opening.Shower nozzle top cover (4) is sealed in above shower nozzle (6), passes through flow control
Stopper rod drive mechanism (1) control flow control stopper rod (5) processed blocks the discharging opening of shower nozzle (6) bottom, opens material inlet valve
(3) melt, is loaded into shower nozzle (6) by feed pipe (2), its initial liquid height is 100mm；Controlled by flow
Stopper rod drive mechanism (1) control flow control stopper rod (5) opens the discharging opening of shower nozzle (6) bottom, makes melt in gravity
Under effect, flowed out from the discharging opening of shower nozzle (6) bottom with thicker cylindrical flow, and according to printing demand, change flow control
Relative distance between stopper rod (5) bottom processed and the discharging opening bottom of shower nozzle (6), realize to the continuous of shower nozzle (6) discharging flow
Regulation and control；Melt is supplemented into shower nozzle (6) by feed pipe (2) during discharging, keeps melt liquid level
Stabilization, so as to obtain the liquid stream being relatively large in diameter that flow can continuously regulate and control；Then flow control plug bar drive mechanism (1) is passed through
Control flow control stopper rod (5) to block the discharging opening of shower nozzle (6) bottom, pressure is higher than shower nozzle (6) external ambient air pressure 40kPa
Gas be filled with by gas pipeline (8) in shower nozzle (6), make melt under the influence of air pressure, from flow control plug bar (5)
The discharge opening of bottom is sprayed with thinner cylindrical flow, and according to printing demand, regulation pressure regulating valve (7), changes shower nozzle (6)
The size of interior air pressure, realize the continuous regulation and control to shower nozzle (6) discharging flow, so as to obtain diameter that flow can continuously regulate and control compared with
Small liquid stream；Change the air pressure in shower nozzle (6) finally by pressure regulating valve (7), make shower nozzle (6) inner and outer air pressure equal, spray can be made
Melt in head (6) stops spraying.
Embodiment 3：
When liquid level is 30mm, pure tin melt only under gravity can be from flow control plug bar (5) bottom
The cut off diameter of discharge opening outflow is 0.8mm, therefore, selects a diameter of 8mm of shower nozzle (6) bottom discharging opening, selects flow control
A diameter of 0.08mm of stopper rod (5) bottom processed discharge opening.Shower nozzle top cover (4) is sealed in above shower nozzle (6), controlled by flow
Stopper rod drive mechanism (1) control flow control stopper rod (5) blocks the discharging opening of shower nozzle (6) bottom, opens material inlet valve (3),
Pure tin melt is loaded into shower nozzle (6) by feed pipe (2), its initial liquid height is 30mm；Pass through flow control plug bar
Drive mechanism (1) control flow control stopper rod (5) opens the discharging opening of shower nozzle (6) bottom, makes effect of the pure tin melt in gravity
Under, flowed out from the discharging opening of shower nozzle (6) bottom with thicker cylindrical flow, and according to printing demand, change flow control plug
Relative distance between bar (5) bottom and the discharging opening bottom of shower nozzle (6), realize the continuous regulation and control to shower nozzle (6) discharging flow；
Pure tin melt is supplemented into shower nozzle (6) by feed pipe (2) during discharging, keeps the steady of pure tin melt liquid level height
It is fixed, so as to obtain the liquid stream being relatively large in diameter that flow can continuously regulate and control；Then controlled by flow control plug bar drive mechanism (1)
Flow control plug bar (5) blocks the discharging opening of shower nozzle (6) bottom, and pressure is higher than to shower nozzle (6) external ambient air pressure 50kPa gas
Body is filled with shower nozzle (6) by gas pipeline (8), makes pure tin melt under the influence of air pressure, from flow control plug bar (5) bottom
Discharge opening sprayed with thinner cylindrical flow, and according to printing demand, regulation pressure regulating valve (7), change in shower nozzle (6)
The size of air pressure, the continuous regulation and control to shower nozzle (6) discharging flow are realized, it is less so as to obtain the diameter that flow can continuously regulate and control
Liquid stream；Change the air pressure in shower nozzle (6) finally by pressure regulating valve (7), make shower nozzle (6) inner and outer air pressure equal, shower nozzle (6) can be made
Interior pure tin melt stops spraying.
Embodiment 4：
When liquid level is 60mm, stainless steel melt only under gravity can be from flow control plug bar (5) bottom
Discharge opening outflow cut off diameter be 1.2mm, therefore, select shower nozzle (6) bottom discharging opening a diameter of 2.4mm, selection flow
A diameter of 0.6mm of amount control stopper rod (5) bottom discharge opening.Shower nozzle top cover (4) is sealed in above shower nozzle (6), passes through flow
Control stopper rod drive mechanism (1) control flow control stopper rod (5) to block the discharging opening of shower nozzle (6) bottom, open material inlet valve
(3) stainless steel melt, is loaded into shower nozzle (6) by feed pipe (2), its initial liquid height is 60mm；Pass through flow control
Stopper rod drive mechanism (1) control flow control stopper rod (5) processed opens the discharging opening of shower nozzle (6) bottom, makes stainless steel melt in weight
In the presence of power, flowed out from the discharging opening of shower nozzle (6) bottom with thicker cylindrical flow, and according to printing demand, change stream
Relative distance between amount control stopper rod (5) bottom and the discharging opening bottom of shower nozzle (6), is realized to shower nozzle (6) discharging flow
Continuous regulation and control；Stainless steel melt is supplemented into shower nozzle (6) by feed pipe (2) during discharging, keeps stainless steel melt
The stabilization of liquid level, so as to obtain the liquid stream being relatively large in diameter that flow can continuously regulate and control；Then driven by flow control plug bar
Motivation structure (1) control flow control stopper rod (5) blocks the discharging opening of shower nozzle (6) bottom, and pressure is higher than into shower nozzle (6) external environment condition
Air pressure 10kPa gas is filled with shower nozzle (6) by gas pipeline (8), makes stainless steel melt under the influence of air pressure, from flow
The discharge opening of stopper rod (5) bottom is controlled to be sprayed with thinner cylindrical flow, and according to printing demand, regulation pressure regulating valve (7),
Change the size of the air pressure in shower nozzle (6), realize the continuous regulation and control to shower nozzle (6) discharging flow, can be continuous so as to obtain flow
The less liquid stream of diameter of regulation and control；Change the air pressure in shower nozzle (6) finally by pressure regulating valve (7), make shower nozzle (6) inner and outer air pressure
It is equal, the stainless steel melt in shower nozzle (6) can be made to stop spraying.
Claims (6)
1. a kind of 3D printing flexible spray head, it is characterised in that by flow control plug bar drive mechanism (1), feed pipe (2), enter
Expect valve (3), shower nozzle top cover (4), flow control plug bar (5), shower nozzle (6), pressure regulating valve (7) and gas pipeline (8) composition；Spray
Head (6) is used to contain liquid material, and its underpart is provided with a back taper discharging opening, and a diameter of liquid material of discharging opening bottom
1~10 times of the cut off diameter that can be only flowed out under gravity from the discharging opening of shower nozzle (6) bottom；Shower nozzle top cover (4) position
Above shower nozzle (6), and mutually sealed with shower nozzle (6), for installing feed pipe (2), gas pipeline (8) and flow control plug bar
(5)；Feed pipe (2) through shower nozzle top cover (4) enter shower nozzle (6) in, its outer wall mutually seals with shower nozzle top cover (4), for
Liquid material is added in shower nozzle (6)；Material inlet valve (3) is installed on feed pipe (2), for closing and opening feed pipe
(2)；Gas pipeline (8) through shower nozzle top cover (4) enter shower nozzle (6) in, its outer wall mutually seals with shower nozzle top cover (4), for
Gas is filled with shower nozzle (6), is filled with the pressure of gas by discharging speed, the physical property of liquid material and flow control plug bar
(5) diameter of bottom discharge opening together decides on；Pressure regulating valve (7) is installed on gas pipeline (8), for controlling in shower nozzle (6)
The size of air pressure；Flow control plug bar (5) through shower nozzle top cover (4) enter shower nozzle (6) in, and with the discharging of shower nozzle (6) bottom
Mouth keeps centering, and its underpart is back taper, for blocking and opening the discharging opening of shower nozzle (6) bottom, meanwhile, flow control plug bar
(5) center of bottom is provided with a cylindrical discharge opening, and a diameter of liquid material of discharge opening under gravity can not be from
0.1~1 times of the cut off diameter of the discharge opening outflow of flow control plug bar (5) bottom；Flow control plug bar drive mechanism (1) position
Above flow control plug bar (5), for controlling flow to control stopper rod (5) to move up and down, the discharging to shower nozzle (6) bottom is realized
The blocking of mouth and the regulation and control of the on-line continuous of unlatching and shower nozzle (6) discharging flow.
2. a kind of 3D printing flexible spray head as claimed in claim 1, it is characterised in that flow control plug bar drive mechanism (1)
Type of drive is that motor drives or electromagnetic mechanism drives.
3. a kind of 3D printing flexible spray head as claimed in claim 1, it is characterised in that the liquid material in shower nozzle (6) is bonding
Agent or plastic melt or paraffin melt or metal bath.
4. a kind of 3D printing flexible spray head as claimed in claim 1, it is characterised in that shower nozzle (6) exterior circumferential is mounted with to heat
Device, the temperature of shower nozzle (6) interior liquid material is regulated and controled.
5. a kind of online regulation and control method of a kind of 3D printing flexible spray head using described in claim 1, it is characterised in that will spray
Head top cap (4) is sealed in above shower nozzle (6), controls flow to control stopper rod (5) to spray by flow control plug bar drive mechanism (1)
The discharging opening of head (6) bottom blocks, and opens material inlet valve (3), loads liquid material into shower nozzle (6) by feed pipe (2),
Liquid material initial liquid height is 30~100mm；Flow is controlled to control stopper rod by flow control plug bar drive mechanism (1)
(5) discharging opening of shower nozzle (6) bottom is opened, makes liquid material under gravity, from the discharging opening of shower nozzle (6) bottom with thick
Cylindrical flow is flowed out, and shower nozzle (6) discharging flow is continuously regulated and controled by flow control plug bar (5)；In discharging process
In by feed pipe (2) to supplement liquid material in shower nozzle (6), the stabilization of liquid material liquid level is kept, so as to obtain
The big liquid stream that flow can continuously regulate and control；Then flow is controlled to control stopper rod (5) to block by flow control plug bar drive mechanism (1)
The discharging opening of shower nozzle (6) bottom, gas of the pressure higher than shower nozzle (6) 5~50kPa of external ambient air pressure is passed through into gas pipeline
(8) it is filled with shower nozzle (6), makes liquid material under the influence of air pressure, from the discharge opening of flow control plug bar (5) bottom carefully to justify
Cylindricality liquid stream is sprayed, and shower nozzle (6) discharging flow is continuously regulated and controled by pressure regulating valve (7), can be connected so as to obtain flow
The small liquid stream of continuous regulation and control；Change the air pressure in shower nozzle (6) finally by pressure regulating valve (7), make shower nozzle (6) inner and outer air pressure equal,
The liquid material in shower nozzle (6) can be made to stop spraying.
6. the online regulation and control method of a kind of 3D printing flexible spray head as claimed in claim 5, it is characterised in that flowed by adjusting
The size of relative distance and shower nozzle (6) interior air pressure between amount control stopper rod (5) bottom and shower nozzle (6) discharging opening bottom is distinguished
On-line continuous regulation and control are carried out to shower nozzle (6) discharging flow, when flow control plug bar (5) blocks the discharging opening of shower nozzle (6) bottom
When, flow control plug bar (5) is formed with shower nozzle top cover (4) by the inverted cone-shaped structure of its middle and upper part and sealed, and is prevented in shower nozzle (6)
Gap of the gas between flow control plug bar (5) and shower nozzle top cover (4) in escape.
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| CN109263044A (en) * | 2018-09-21 | 2019-01-25 | 安徽工程大学 | A kind of adjustable 3D printing spray head of flow |
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| CN110524868A (en) * | 2019-07-29 | 2019-12-03 | 华南理工大学 | A kind of 3D printer fluent material print head |
| JP2020062797A (en) * | 2018-10-17 | 2020-04-23 | セイコーエプソン株式会社 | Three-dimensional modeling system and data generation device |
| WO2021031444A1 (en) * | 2019-08-16 | 2021-02-25 | 华南理工大学 | Solid-liquid-material combined double-headed 3d printer and printing method therefor |
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| CN114131051A (en) * | 2021-11-25 | 2022-03-04 | 武汉轻工大学 | Metal melting extrusion deposition forming device and method |
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| CN109263044A (en) * | 2018-09-21 | 2019-01-25 | 安徽工程大学 | A kind of adjustable 3D printing spray head of flow |
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| CN110524868A (en) * | 2019-07-29 | 2019-12-03 | 华南理工大学 | A kind of 3D printer fluent material print head |
| CN110524868B (en) * | 2019-07-29 | 2023-09-08 | 华南理工大学 | Liquid material printing head for 3D printer |
| WO2021031444A1 (en) * | 2019-08-16 | 2021-02-25 | 华南理工大学 | Solid-liquid-material combined double-headed 3d printer and printing method therefor |
| CN112792358A (en) * | 2020-12-24 | 2021-05-14 | 武汉轻工大学 | Melt flow control method and device for extrusion deposition forming |
| CN114131051A (en) * | 2021-11-25 | 2022-03-04 | 武汉轻工大学 | Metal melting extrusion deposition forming device and method |
| CN114131051B (en) * | 2021-11-25 | 2023-09-22 | 武汉轻工大学 | Metal melt extrusion deposition forming device and method |
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