CN105889571A - Multi-channel telescopic nozzle valve for 3D printing and nozzle valve control system - Google Patents
Multi-channel telescopic nozzle valve for 3D printing and nozzle valve control system Download PDFInfo
- Publication number
- CN105889571A CN105889571A CN201610387141.2A CN201610387141A CN105889571A CN 105889571 A CN105889571 A CN 105889571A CN 201610387141 A CN201610387141 A CN 201610387141A CN 105889571 A CN105889571 A CN 105889571A
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- Prior art keywords
- cylinder
- nozzle
- valve
- mounting seat
- bore
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
Abstract
The invention discloses a multi-channel telescopic nozzle valve for 3D printing. The multi-channel telescopic nozzle valve comprises installation bases, cylinders, valve needles and nozzles. An upper section of each installation base is provided with a feeding channel, and one or more inner holes are axially distributed in a lower section of each installation base. A discharging branch opening is formed in each feeding channel and communicates with the upper end of each inner hole, and the lower end of each inner hole is opened. The cylinders are installed in the inner holes of the installation bases and stretch out of the opening ends of the inner holes of the installation bases. The top ends of the cylinders are provided with cylinder feeding ports. Hollow valve cavities are formed in the cylinders. The valve needles penetrate the valve cavities of the cylinders to be assembled on the installation bases. The nozzles are arranged at the end portions of the ends, stretching out of the installation bases, of the cylinders, and the tail portions of the nozzles are provided with nozzle holes. A discharging channel is formed by a gap between each valve needle and the corresponding valve cavity, wherein the discharging channel communicates with the corresponding discharging branch opening. Each nozzle hole communicates with the corresponding discharging channel. By means of the multi-channel telescopic nozzle valve, materials are not liable to leak or be blocked, stability is good, reliability is good, use is convenient, design is novel, practicability is high, the 3D printing efficiency is obviously improved, and economic value is high.
Description
Technical field
The present invention relates to 3D printing technique field, particularly relate to a kind of 3D printing multichannel extension jet nozzle valve,
Further relate to nozzle group valve control system.
Background technology
3D prints, and is according to designed 3D model, successively increases material by 3D printing device and manufacture
The technology of three-dimensional objects.This successively stack shaping technology is also referred to as increasing material manufacture.3D prints and combines number
The forward position skill of the numerous areas such as word modeling technique, Electromechanical Control technology, information technology, material science and chemistry
Art, is the one of rapid shaping technique, is described as the core technology of " industrial revolution for the third time ".With tradition
Manufacturing technology is compared, and 3D prints need not manufacture mould in advance, it is not necessary to remove substantial amounts of material in the fabrication process,
Also can be obtained by final products without going through complicated Forging Technology, therefore, knot can be realized on producing
Structure optimizes, saves material and save the energy.3D printing technique is suitable for new product development, quick-acting single and little
Part volume manufacture, the manufacture of complicated shape part, design and the manufacture etc. of mould, be also suitable for difficult processing
The manufacture of material, configuration design inspection, assembly test and Rapid reverse engineering etc..Therefore, 3D prints industry
Receive and pay close attention to the most widely both at home and abroad, will become next and have rising industry with broad prospects for development.
At present, 3D prints and has been applied to the fields such as product prototype, Making mold, art creation product, jewelry-making,
The conventional fine processing technology that these fields alternative are relied on.In addition, bioengineering and medical science,
The fields such as building, clothes, the introducing of 3D printing technique has also opened up broader development space for it.
Fusion sediment (FDM) type 3D printing technique system needs use spray nozzle device, however existing
Spray nozzle device also exists following problem:
1, nozzle diameter is the most changeable, prints outline and prints the internal nozzle filled as using, it is impossible to
The high-precision requirement of exterior contour is met with the internal low precision flying print demand filled simultaneously；
2, when print procedure proceeds to clear area, printed material can not immediately turn off, even if because stopping printing
The extrusion of material, rests on the hot melt materials in nozzle and also can continue under the effect of thermal expansion and gravity
Mass flowing nozzle, is therefore susceptible to leakage, and meanwhile, material leakage also can the pressure of nozzle interior change,
Pass by behind clear area, when the most again printing, have one section of pressure instability, thus flaw occurs；
3, when there being two or more materials to need to print on same printer, the printing that two or more is different
Nozzle at grade, can interfere with each other, do not have use nozzle can scratch another nozzle the most printed,
The material surface of ot-yet-hardened.
Summary of the invention
It is an object of the invention to overcome the deficiency of above-mentioned prior art to provide a kind of 3D printing multichannel
Extension jet nozzle valve, uses the extension jet nozzle valve of the present invention, and nozzle diameter can switch, and prints fine foreign steamer
Time wide, it is switched to hand line nozzle, when printing the inside not having required precision and filling, then uses and be much larger than
The heavy caliber nozzle of hand line nozzle, makes print speed promote several times；When printing proceeds to clear area, beat
Printed material material can be cut off material from the end of nozzle bore by the mechanical force between needle and nozzle, and maintains inside
Pressure be unlikely to because material leakage and change, when clear area of passing by prints again, it is not necessary to rebuild pressure make
Print more stable；When two or more materials print on same printer or use two kinds of bore differences
Nozzle time, the nozzle not used turn off during, have left the plane printed automatically, no
The plane printed can there be is any scuffing.
For achieving the above object, the present invention provides a kind of 3D printing multichannel extension jet nozzle valve, including:
Mounting seat, the epimere of described mounting seat is provided with feeding-passage, axially distributed in described mounting seat hypomere
Having one or several endoporus, described feeding-passage is provided with discharging discrimination mouth, and described discharging discrimination mouth is interior with each respectively
The upper end in hole communicates, and the lower end of described endoporus is opening；
Cylinder, described cylinder is moveably mounted in the endoporus of each described mounting seat, and described cylinder is from peace
The openend of dress seat endoporus is stretched out, and the top of described cylinder is provided with cylinder charging aperture；In described cylinder it is
Heart valve pocket；
Needle, described needle is assemblied in described mounting seat through the valve pocket of each described cylinder；
Nozzle, described nozzle is located at each described cylinder and is stretched out the end of mounting seat one end, described nozzle afterbody
It is provided with nozzle bore；
Wherein, described needle forms tapping channel, described tapping channel and discharging discrimination with the gap of described valve pocket
Mouth communicates, and described nozzle bore communicates with tapping channel.
Preferably, when nozzle is set to several, the bore of each described nozzle bore is different.
Preferably, the aperture of described nozzle bore arranges from small to large.
Preferably, described cylinder uses fluid force-transmitting mode to axially move in described mounting seat endoporus.
Preferably, upper and lower section of the endoporus of described mounting seat and cylinder epimere outer peripheral edge and hypomere outer peripheral edge phase
Contact position is respectively equipped with seal and lower seal.
Preferably, described cylinder stage casing between seal and described lower seal on described is provided with diameter and expands
Big cylinder cylinder.
Preferably, described cylinder cylinder side wall is provided with at least one annular groove.
Preferably, described mounting seat subsection setup, each section is locked by fastening bolt.Fastening bolt can
Be positioned at inside mounting seat, in order to from inside by each section of locking.
Preferably, in described annular groove, fill and present slipper seal material, made described cylinder and mounting seat endoporus
Seal and be slidably connected.
Preferably, described slipper seal material is solid-state slipper seal material.
Preferably, described solid-state slipper seal material is expanded graphite.
Preferably, between described cylinder cylinder and upper seal, have a first fluid room, described cylinder cylinder with under
Second fluid room is had between seal.
Preferably, described first fluid room is connected with first fluid valve by first fluid through hole.
Preferably, described second fluid room is connected with second fluid valve by second fluid through hole.
Preferably, the top of described needle or side connect at least one bolt, described bolt
Described needle is fixed on the endoporus upper surface of described mounting seat.It is of course also possible to use other location to fill
Put, in order to being fixed on needle in mounting seat, or, the epimere of needle is directly and mounting seat forms one
Overall structure.
Preferably, described location screw stretches into described mounting seat the top with described needle outside mounting seat
Locking.
Preferably, the epimere of described cylinder is provided with a spacing groove, described spacing groove and needle top-side
Positive stop key be slidably matched to make cylinder charging aperture align with discharging discrimination mouth.
Preferably, the periphery of described mounting seat is provided with heater.
Preferably, described heater is electric heater unit.
Preferably, the epimere of described mounting seat is additionally provided with a feeding-passage；It is additionally provided with one in described feeding-passage
Screw rod；The lower end of described feeding-passage sequentially turns on discharging discrimination mouth, cylinder charging aperture.
Preferably, the afterbody conical surface of described needle expands and blocks described nozzle bore, its diameter expanded and nozzle
Aperture adapts.
Preferably, in described nozzle, it is provided with step surface or the conical surface, under nozzle closed mode, described step surface
Or the afterbody taper-face contact of the conical surface and needle；Then disengage under nozzle open mode.
Preferably, described cylinder during the shift motion disengaged, effective flow area of nozzle bore
Changing continuously, the flow in adjustable nozzles hole is from the zero to maximum.
As a kind of equivalent way, described cylinder is fixedly installed in described mounting seat, and described needle is in institute
State in the valve pocket of cylinder and move up and down, block described nozzle bore in the lower position of needle shift motion, moving
In dynamic stroke, the flow in adjustable nozzles hole is from the zero to maximum.
Preferably, described cylinder is provided with four, and the needle matched with described cylinder is also equipped with four.
Preferably, also include pressed gas passage, also include being surrounded on described cylinder lateral wall and being arranged at
Cincture air chamber on described mounting seat endoporus madial wall, one end of described pressed gas passage communicates with the external world,
Its other end communicates with around air chamber, is continually fed into pressed gas by pressed gas passage in air chamber,
And the pressure of pressed gas is more than or equal to the pressure of molten state printed material in tapping channel, makes beating of molten state
Printed material material cannot flow out with mounting seat endoporus gap location from cylinder lateral wall.
Preferably, multiple pressed gas passage the most also can be set along described cylinder, around air chamber.Make cylinder
Lateral wall forms multiple airtight seal ring.Solve single around the air chamber pressure too fast problem of decay, stability,
Reliability is more preferably.
The present invention also provides for a kind of nozzle group valve control system, including:
Control circuit；
Fluid source, described fluid source under the control of control circuit to second fluid room, first fluid room is passed through
Controlled pressure fluid, in order to drive cylinder to move up and down, it is achieved the opening and closing of nozzle.
Preferably, fluid source supply gas, such as nitrogen, air or other inert gases.
The invention has the beneficial effects as follows:
1, using the extension jet nozzle valve of the present invention, nozzle diameter can switch, when printing fine outline,
It is switched to hand line nozzle, when printing the inside not having required precision and filling, then uses much larger than small-bore
The heavy caliber nozzle of nozzle, makes print speed promote several times.
2, when printing proceeds to clear area, printed material can be from the end of nozzle bore by between needle and nozzle
Mechanical force cut off material, and the pressure maintaining inside is unlikely to change, blank of passing by because material leakage
When district prints again, it is not necessary to rebuild pressure and make printing more stable.
3, when two or more materials print on same printer or use the different nozzle of two kinds of bores
Time, the nozzle not used, during turning off, have left the plane printed automatically, will not be to
Plane through printing has any scuffing.
4, the present invention uses fluid force-transmitting control, and fluid can be gas, liquid, liquid metal, flowable
Powder, flowable particle etc., the multiple spray of control that its fluid valve can be long-range away from the high-temperature region printed
The opening and closing of mouth.
5, in addition to above-mentioned beneficial functions, when there being large area to fill print zone, multiple passage can be had concurrent
Ejection 3D printing material, can promote print speed greatly；Additionally, the concurrent discharging of multichannel there is also
Several modes, adjacent two passages discharging simultaneously is in order to accelerate filling；Adjacent three passages discharging simultaneously
In order to accelerate filling；Two of interval or the dischargings simultaneously of three passages are filled in order to accelerating；All passage is same
Time discharging in order to accelerate fill；When accelerating to fill, in sequential, each nozzle opens and closes and can also carry out
Control, during as closed on end-of-fill, close the nozzle that bore is bigger successively.
6, the mounting seat of the present invention uses segmented to arrange, it is simple to install expanded graphite, uses and expands
It is very reliable that graphite serves as slipper seal material, and extension jet nozzle valve is at high temperature to work, common sealing material
Material is difficult at high temperature stable existence, and the pre-thermal expansion of expanded graphite produces lasting pressure to sealing position, with
Time can serve as again kollag reduce frictional force, when sealing surface wear, the expansion meeting of expanded graphite
Make sealing surface automatically derive compensation, therefore use expanded graphite long-term realization to seal reliably.
7, when nozzle of the present invention changes with needle taper-face contact Connexin, the flow of printed material can be regulated,
Can be with the different flow combination of multiple nozzles to adapt to more complicated printing demand；
8, good stability of the present invention, of good reliability, easy for operation, novel in design, practical, easily
In popularization and application.
Accompanying drawing explanation
Fig. 1 is the generalized section of one embodiment of the invention multichannel extension jet nozzle valve；
Fig. 2 is the upward view of Fig. 1；
Fig. 3 is the partial schematic sectional view at the A of Fig. 1；
Reference:
Mounting seat 10；Feeding-passage 11；Discharging discrimination mouth 111；Screw rod 112；
Cylinder 20；Upper seal 201；Lower seal 202；Cylinder cylinder 21；Annular groove 211；
Needle 30；Bolt 31；Positive stop key 32；
Tapping channel 40；Cylinder charging aperture 401；Spacing groove 402；
First fluid room 51；First fluid through hole 511；Second fluid room 52；Second fluid through hole 521；
Around air chamber 53；Pressed gas passage 531；
Nozzle 60；Nozzle bore 601；
Heater 80.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do furtherly referring to the drawings
Bright.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, wherein certainly
Begin to same or similar label eventually represent same or similar element or there is the unit of same or like function
Part.The embodiment described below with reference to accompanying drawing is exemplary, it is intended to be used for explaining the present invention, and not
It is understood that as limitation of the present invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ",
" length ", " width ", " thickness ", " on ", D score, "front", "rear", " left ",
" right ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ",
Orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, are only
Must have for the ease of describing the present invention and simplification description rather than instruction or the device of hint indication or element
Have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " even
Connect ", the term such as " fixing " should be interpreted broadly, connect for example, it may be fixing, it is also possible to be removable
Unload connection, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together,
Can also be indirectly connected to by intermediary, can be the connection of two element internals.General for this area
For logical technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Referring to Fig. 1 and Fig. 3, the present invention provides a kind of 3D printing multichannel extension jet nozzle valve, solves
The most switchable problem of nozzle 60 bore in print procedure, it includes mounting seat 10, cylinder 20, needle 30
With nozzle 60, wherein, in described mounting seat 10, there are one or several endoporus along its axial distribution, each described
The top of endoporus or side have discharging discrimination mouth 111；Described cylinder 20 is moveably mounted to described mounting seat
In each endoporus of 10, described cylinder 20 stretches out from mounting seat 10 one end, the top of each described cylinder 20
It is provided with the cylinder charging aperture 401 being oppositely arranged with described discharging discrimination mouth 111；It is provided with in each described cylinder 20
The valve pocket arranged along its axial direction；Each described needle 30 passes the valve pocket of corresponding cylinder 20 also
Being fixedly mounted in described mounting seat 10, described needle 30 is formed and described cylinder with the gap of described valve pocket
The tapping channel 40 of charging aperture 401 conducting；Described nozzle 60 is located at each described cylinder 20 and is stretched out mounting seat
The end of 10 one end, described nozzle 60 afterbody is provided with nozzle bore 601.The all parts of the present invention can use
Metal is made, such as iron or other alloy materials.Described nozzle 60 uses spiral to be connected with cylinder 20.For
Increasing the capacity of feeding-passage 11, the stage casing diameter of described needle 30 reduces, in certain cylinder inboard wall
Section internal diameter increases can also realize said function.
In the above-described embodiments, logical in order to open or close discharging dynamically by arranging cylinder 20, needle 30
Road 40, and then control the supply status of the 3D hot material of printing, the present invention is applicable to 3D printer
Material organization of supply, it is also possible in other spraying equipments.The present invention can coordinate with material extruder to be made
With, use existing 3D printing extruder to combine with extension jet nozzle 60 valve of the present invention, belong to this
Within bright protection domain.
One embodiment of the present of invention, when nozzle 60 is set to several, the bore of each described nozzle bore 601
Difference, its printing precision of small-bore nozzle 60 is high, and bigbore its discharging speed of nozzle 60 is fast.
One embodiment of the present of invention, the aperture of described nozzle bore 601 arranges from small to large.
One embodiment of the present of invention, the aperture of multiple described nozzle bores 601 is in side clockwise or counter-clockwise
To or rectilinear direction on arrange according to arithmetic progression or Geometric Sequence.
1, the general term formula of arithmetic progression: an=a1+ (n-1) * d, a1=2, d=2, n are whole more than or equal to 2
Number.
2, the general term formula of Geometric Sequence: an=a1*qn-1, a1=2, q=2, n are the integer more than or equal to 2.
As a example by four nozzles 60 are set: four nozzles 60 can linearly direction arrangement；Can also be in ring
Shape arranges, it is also possible to three distribution circumferentially another nozzles 60 are distributed at round dot；Four nozzles 60
Bore can be 2mm, 4mm, 6mm, 8mm；Can also be 2mm, 4mm, 8mm, 16mm.
If linearly type arrangement, then the aperture of these four nozzles 60 according to 2mm, 4mm, 6mm, 8mm or 2mm,
4mm, 8mm, 16mm order arrangement；If four nozzles 60 are substantially arranged according to annular, then clockwise
Or in counter clockwise direction, the aperture of these four nozzles 60 according to 2mm, 4mm, 6mm, 8mm or 2mm,
4mm, 8mm, 16mm order arrangement；If three distribution circumferentially another nozzles 60 are distributed in round dot
Place, then on circumference by three, direction nozzle 60 bore clockwise or counter-clockwise according to 2mm, 4mm, 6mm
Or 2mm, 4mm, 8mm order arrangement, is 8mm or 16mm at round dot.
Following situation is there is also: by the nozzle bore 601 mouthfuls of four nozzles 60 for arranging four nozzles 60
Footpath is respectively designated as nozzle bore 601 bore A, nozzle bore 601 bore B, nozzle bore 601 bore C, spray
Nozzle aperture 601 bore D, then the bore of four nozzles 60 is likely to be:
1, nozzle bore 601 bore A=nozzle bore 601 bore B=nozzle bore 601 bore C < nozzle bore 601
Bore D；
2, nozzle bore 601 bore A=nozzle bore 601 bore B < nozzle bore 601 bore C=nozzle bore 601
Bore D；
3, nozzle bore 601 bore A=nozzle bore 601 bore B < nozzle bore 601 bore C < nozzle bore 601
Bore D；
4, nozzle bore 601 bore A < nozzle bore 601 bore B=nozzle bore 601 bore C=nozzle bore 601
Bore D；
Within these situations above-mentioned also belong to protection scope of the present invention.Further say, if arranging three
Individual or five or six or eight or during more nozzle 60, its bore there is also above-mentioned change situation, and this is all
Within belonging to protection scope of the present invention.Refer to Fig. 2, when nozzle 60 arranges six, the mouth of nozzle 60
Footpath can be 2mm, 4mm, 8mm, 16mm, 32mm or 2mm, 4mm, 6mm, 8mm,
10mm。
Assuming that nozzle 60 arranges 8, be divided into two groups, often group includes the nozzle 60 of four bore order changes,
When then blocking when a certain nozzle 60 in a certain group or need to change, it is possible to use another group replaces,
In order to realize redundancy.Use the difference of frequency according to nozzle 60, can will hold susceptible to plugging hand line nozzle 60
Quantity be set to multiple, increase equipment reliability of operation, when a certain hand line nozzle 60 blocks, can
To enable the nozzle 60 of another identical bore in time, make print procedure successive.As arranged 5 nozzles 60,
Its bore be respectively 2mm, 2mm, 4mm, 6mm, 8mm or 2mm, 2mm, 4mm, 8mm,
16mm.Nozzle 60 is arranged many groups on nozzle 60 valve, in order to promote redundancy, strengthens equipment dependability
Improvement, within belonging to protection scope of the present invention.
One embodiment of the present of invention, is further limited the motion mode of cylinder 20: described cylinder 20
Pneumatic mode or mode of surging is used to axially move in described mounting seat 10 endoporus.Further, described
The circular in cross-section of endoporus.The mode of surging can use hydraulic oil or liquid metal or flowable powder or
Flowable particle etc..Using pneumatic mode is highly preferred mode, and at high temperature, gas is heated and is difficult to point
Solve rotten；As used air.
In the above-described embodiments, by controlling described cylinder 20 axially-movable state in order to control tapping channel 40
Opening and closing, when cylinder 20 motion make nozzle 60 leave needle 30 time, printed material flows out from nozzle bore 601.
When cylinder 20 motion makes nozzle 60 contact needle 30, needle 30, cylinder 20 and nozzle 60 form envelope
Closing structure, now, material does not flows out from tapping channel 40.At this point it should be noted that at synchronization, can
To have one or several nozzle 60 opening and closing, now, extension jet nozzle 60 valve of the present invention achieves 60 mouthfuls of nozzle
The switching in footpath also can realize concurrent type frog multichannel material supply simultaneously.
One embodiment of the present of invention, the upper-lower section of described mounting seat 10 endoporus and cylinder 20 epimere outer peripheral edge
It is respectively equipped with upper seal 201 and lower seal 202 with hypomere outer peripheral edge touching position.Described cylinder 20 exists
Stage casing between described upper seal 201 and described lower seal 202 also has the cylinder cylinder of an enlarged-diameter
21 (being a piston when of concrete manufacture).Described cylinder cylinder 21 sidewall is provided with at least one annular groove
211.Described upper seal 201 and lower seal 202 are the groove filling and presenting solid-state slipper seal material, as
Fill and present expanded graphite.The quantity of described cylinder cylinder 21 can also arrange several.
In the above-described embodiments, described cylinder cylinder 21 can arrange one or several annular groove 211,
The degree of depth of each annular groove 211, width are not particularly limited, and the shape of described annular groove 211 also may be used
With irregularly.The cross section of described annular groove 211 is circular arc, V-arrangement or other shapes.
One embodiment of the present of invention, described cylinder cylinder 21 sidewall is provided with interval and arranges two annular grooves
211.Further, the shape of two described annular grooves 211 is identical.
In order to promote the sealing property of the present invention further, one embodiment of the present of invention, described annular groove
Fill and present slipper seal material in 211, made described cylinder 20 seal with mounting seat 10 endoporus and be slidably connected.
Concrete, described slipper seal material is solid-state slipper seal material.
More specifically, described solid-state slipper seal material is expanded graphite.
One embodiment of the present of invention, has first fluid room between described cylinder cylinder 21 and upper seal 201
51, there is second fluid room 52 between described cylinder cylinder 21 and lower seal 202.More specifically, described
Force value in first fluid room 51 is consistently greater than the force value equal to tapping channel 40, and therefore, discharging is led to
Printed material in road 40 will not be revealed outside cylinder 20, plays pressure sealing function, first fluid room
51, second fluid room 52 is a sealing space, after extension jet nozzle 60 valve works, and described first fluid room
All the time fluid it is connected with, in order to maintain sealing property in 51.Owing to the fluid pressure of first fluid room 51 is higher than
The pressure of material passage 40, the material in tapping channel 40 does not haves leakage.Reach hermetic seal or liquid
The effect sealed.
One embodiment of the present of invention, described second fluid room 52 is by second fluid through hole 521 and fluid source
Being connected, there are two atmospheric pressure states in described second fluid room 52, the first state is the pressure of second fluid room 52
Force value is higher than the force value of described first fluid room 51, and now, described cylinder 20 is in the state of moving upward,
Nozzle 60 top is closed to needle 30 tapping channel 40；Second state is that the force value of second fluid room 52 is low
In the force value of described first fluid room 51, now, described cylinder 20 is in the state of stretching out, tapping channel
40 open.Additionally, further expand, described first fluid room 51, second fluid room 52 can be with positions
Exchange, but to adjust its control method accordingly.
One embodiment of the present of invention, first fluid through hole 511 is passed through with first-class in described first fluid room 51
Body valve is connected.Described second fluid room 52 is connected with second fluid valve by second fluid through hole 521, passes through
First fluid through hole 511, second fluid through hole described in first fluid valve, second fluid valve distributed controll is set
The opening and closing of 521.
One embodiment of the present of invention, the top of described needle 30 or side connect at least one bolt
31 (being preferably arranged to two), described needle 30 is fixed on described mounting seat 10 by described bolt 31
Endoporus upper surface.Described location screw stretch into outside mounting seat 10 described mounting seat 10 and with described valve
The top locking of pin 30.
One embodiment of the present of invention, the epimere of described cylinder 20 is provided with a spacing groove 402, described spacing
Groove 402 is slidably matched to make cylinder charging aperture 401 and go out with the positive stop key 32 of needle 30 top-side
Material discrimination mouth 111 aligns, and wherein, described needle 30 entirety is inverted L-shaped, is positive stop key 32 at its horizontal buckling.
When cylinder 20 slides up and down, described cylinder charging aperture 401 can also be directed at deflector chute.
One embodiment of the present of invention, the outside of described mounting seat 10 is provided with heater 80.As the present invention
One most preferred embodiment, described heater 80 is electric heater unit 80.Arrange outside described mounting seat 10
Heater 80 is in order to be incubated the material in tapping channel 40.
One embodiment of the present of invention, the epimere of described mounting seat 10 is additionally provided with a feeding-passage 11；Described enter
It is additionally provided with a screw rod 112 in material passage 11；The lower end of described feeding-passage 11 and discharging discrimination mouth 111, cylinder
Body charging aperture 401 sequentially turns on.
One embodiment of the present of invention, the afterbody of described needle 30 expands (as in fusiform) in order to block
Stating nozzle bore 601, its enlarged diametric adapts with nozzle bore 601 footpath, and the afterbody expanded also has the conical surface, institute
The end stating needle 30 is tip.So, the afterbody of needle 30 is carried out various deformation and come under the present invention
Protection domain within.
One embodiment of the present of invention, is provided with step surface or the conical surface, described step surface and valve in described nozzle 60
The conical surface linear contact lay of pin 30 afterbody or face contact.So, by using linear contact lay, hot material and nozzle
60 adhesion is less likely to occur, it is to avoid nozzle 60 blocks, and makes the stability of nozzle 60 valve strengthen.
One embodiment of the present of invention, described cylinder 20 is provided with four, matches with described cylinder 20
Needle 30 is also equipped with four.Further, it is also possible to cylinder 20 to be arranged six (referring to Fig. 3) or more
Individual.It is parallel to each other between cylinder 20, but, the spacing between cylinder 20 might not be identical.
For the ease of installing, described mounting seat 10 subsection setup, adjacent two sections are fixing to be connected.That is, described
Mounting seat 10 uses the mode of lamination to arrange, and described mounting seat 10 is internal is additionally provided with a fastening bolt, in order to
Mounting seat 10 is fixed.Additionally, be additionally provided with dividing plate or sealing gasket etc. between each lamination of mounting seat 10.
Additionally, in order to mounting seat 10 is fixed, it is also possible in the following way: weld between adjacent two sections；Or
Person；Described mounting seat 10 subsection setup, with bolts between adjacent two sections.
Additionally, as a kind of deformation of the present invention, when arranging 4 endoporus in mounting seat 10, material from
Discharging discrimination mouth 111 is distributed to 4 tapping channels 40, and this substantially achieves a kind of five-way valve (multiple-way valve)
Function (enters four goes out), so, if the internal structure of the present invention is transformed into five-way valve, it is also possible to real
The existing purpose of the present invention, this belongs to the conventional deformation of the present invention.
In order to above-mentioned 3D printing multichannel extension jet nozzle valve is controlled, invention additionally discloses a kind of spray
Mouth 60 valve control system, including control circuit；Fluid source, described fluid source under the control of control circuit to
Second fluid room 52, first fluid room 51 are passed through gas, in order to drive cylinder 20 to move up and down, it is achieved spray
The opening and closing of mouth 60.Also include that a device for pressure measurement, described device for pressure measurement are used for measuring described second
Body room 52, the gas pressure of first fluid room 51；Described device for pressure measurement is connected with control circuit, described
The parameter feedback that control circuit returns according to device for pressure measurement controls second fluid room 52, first fluid room 51
Force value, and then realize cylinder 20, the jack-up of nozzle 60 or retracted state.
As a kind of alternative of pneumatic mode, the present invention also provides for a technical scheme: described fluid source is
Hydraulic system, described hydraulic system under the control of control circuit to second fluid room 52, first fluid room 51
It is passed through hydraulic oil, by the oil pressure value in control second fluid room 52, first fluid room 51 in order to control cylinder
20, the motion state of nozzle 60.
One embodiment of the present of invention, also includes that a signal trigger module, described signal trigger module are beaten at 3D
Send to control circuit under the triggering of print formula and trigger signal；Described control circuit is according to triggering signal to first
Fluid valve and or second fluid valve send control signal, concrete control first fluid through hole 511 and or second
Being turned on and off of body through hole 521.
One embodiment of the present of invention, first fluid through hole 511 maintains a normally open state, and described fluid source is in control
Continue under the control of circuit processed to be passed through gas to first fluid room 51.
One embodiment of the present of invention, the force value of described first fluid room 51 prints higher than tapping channel 40
Material actual pressure.More specifically, the force value of described first fluid room 51 is higher than tapping channel 40 institute
Upper limit of pressure threshold value can be reached.
As a kind of embodiment deteriorated, described cylinder 20 is fixedly installed in described mounting seat 10,
Described needle 30 moves up and down in the valve pocket of described cylinder 20, in the lower position of needle 30 shift motion
Blocking described nozzle bore 601, in the stroke of movement, the flow in adjustable nozzles hole 601 is from the zero to maximum
Value.
For more expanding, described cylinder 20 can also use electromagnetic force to drive, under the driving of electromagnetic force,
Described cylinder 20 realizes moving up and down.Additionally, cylinder 20 can also use mechanical force to drive, such as cylinder 20
Side connect have connecting rod, by connecting rod drive cylinder 20 move up and down.Can also use chain, gear,
The kinds of drive such as screw mandrel, it is also possible to by prior art, how engine drives the mechanism of reciprocating motion of the pistons to do
Simple deformation applies among this present invention, and these drive the deformation of cylinder 20 reciprocating manner, conversion all
Within belonging to protection scope of the present invention.
Refer to Fig. 1, in order to realize hermetic seal function, it is to avoid the molten state material in tapping channel 40 is from cylinder
Gap location between body 20 lateral wall, mounting seat 10 endoporus flows out, and causes loss of material, and pollutes stifled
Plug tube body 20, makes the reciprocating motion of cylinder 20 be obstructed, and in order to solve this technical problem, the present invention provides a skill
Art scheme: also include pressed gas passage 531, also includes being surrounded on described cylinder 20 lateral wall and setting
On described mounting seat 10 endoporus madial wall around air chamber 53, one end of described pressed gas passage 531 with
The external world communicates, and its other end communicates with around air chamber 53, by pressed gas passage 531 to around air chamber 53
Inside it is continually fed into pressed gas, and the pressure of pressed gas prints material more than or equal to molten state in tapping channel 40
The pressure of material, the printed material making molten state cannot be from cylinder 20 lateral wall and mounting seat 10 endoporus gap location
Flow out.Described cincture air chamber 53 is an annular groove being circumferentially positioned on mounting seat 10 endoporus madial wall.Due to
Gap between mounting seat 10 endoporus and cylinder 20 lateral wall is the least, and gas has pressure to damage by close gap
Losing, it is therefore assumed that only arrange a pressed gas passage 531, gas can not be isobaric around cylinder 20 lateral wall circumference,
And then it is unable to reach the anti-leak function of annular.Certainly, if will remove around air chamber 53 feature, and only arrange
One pressed gas passage 531 is in order to realize hermetic seal, as a kind of deterioration scheme of the present invention: improve from pressure
Power gas passage 531 is passed through the force value of gas, then in cylinder 20 lateral wall circumference, gas pressure all can be big
The pressure of material is printed, then within falling within protection scope of the present invention in feeding-passage 11 molten state.If increasing
Big gap between mounting seat 10 endoporus and cylinder 20 lateral wall, then the gap expanded is equivalent to above-mentioned
Around air chamber 53, this conventional deformation belonging to the present invention and conversion, also within protection scope of the present invention.
If printed material and air have chemical reaction, then can be passed through inert gas or nitrogen, it is to avoid the property of printed material
Matter changes.
Further, multiple pressed gas passage 531, cincture the most also can be set along described cylinder 20
Air chamber 53.Cylinder 20 lateral wall is made to form multiple airtight seal ring.Solve single around air chamber 53 decline of pressure
Too fast problem, arranges single around air chamber 53, and the pressure at air chamber 53 is maximum, to cylinder 20 liang
Lateral pressure decays, two or more around air chamber 53, cylinder 20 lateral wall and mounting seat by arranging
The gap location air pressure of 10 endoporus distribution in axial direction no longer presents simple shape small in ends broad in the middle
State, and become gas and be distributed more stable homogeneous, stability, reliability are more preferably.
Operation principle: hot material enters discharging discrimination mouth 111 from feeding-passage 11, discharging discrimination mouth 111 with
Several cylinder charging apertures 401 communicate, and hot material pours in tapping channel 40.When on cylinder 20
Second fluid room 52 is no longer passed through gas, and the air pressure of second fluid room 52 is less than described first fluid room 51
Atmospheric pressure value, now, cylinder 20 ejects under the thrust of first fluid room 51, and tapping channel 40 is opened, thing
Material sprays from nozzle bore 601；When the second fluid room 52 on cylinder 20, first fluid room 51 are all passed through gas
Body, and the air pressure of second fluid room 52 higher than the pressure of first fluid room 51 time, described cylinder 20 is second
Regaining under the thrust of fluid chamber 52, tapping channel 40 is closed, and material can not flow out (spray from nozzle bore 601
Go out).Certainly, if by first fluid room 51, second fluid room 52 out of position, the most only need by control
Make the pressure differential of the two, and then the motion state controlling cylinder 20 can control the opening and closing of extension jet nozzle 60 valve.
Further saying, be only to illustrate principle as a example by air pressure controls above, the present invention can also adopt
With other fluids (such as hydraulic oil, liquid metals, mobility powder, flowable particulates etc.).The present invention is excellent
Choosing uses four nozzles 60, and the bore of each nozzle 60 can be arranged as required to (generally, four
The caliber series change of nozzle 60), when needing nozzle 60 outputting material of a certain bore, can pass through
Control fluid source and then control the running status of a certain cylinder 20, and then controlling the opening and closing of a certain cylinder 20,
Certainly, the present invention also supports the concurrent discharging of multiple passage, in order to realize higher function.Due to a certain nozzle
60 are less than other nozzle 60 under retracted state when stretching out, and therefore other idle nozzles 60 will not be right
The material of extrusion, product to be processed cause interference effect.
In the description of this specification, reference term " embodiment ", " some embodiments ", " show
Example ", the description of " concrete example " or " some examples " etc. means to combine this embodiment or example describes
Specific features, structure, material or feature be contained at least one embodiment or the example of the present invention.
In this manual, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.
And, the specific features of description, structure, material or feature can be in any one or more embodiments
Or example combines in an appropriate manner.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment
Being exemplary, it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art is without departing from this
Above-described embodiment can be changed within the scope of the invention in the case of the principle of invention and objective, repair
Change, replace and modification.
Claims (10)
1. a 3D prints with multichannel extension jet nozzle valve, it is characterised in that including:
Mounting seat, the epimere of described mounting seat is provided with feeding-passage, axially distributed in described mounting seat hypomere
Having one or several endoporus, described feeding-passage is provided with discharging discrimination mouth, and described discharging discrimination mouth is interior with each respectively
The upper end in hole communicates, and the lower end of described endoporus is opening；
Cylinder, described cylinder is moveably mounted in the endoporus of each described mounting seat, and described cylinder is from peace
The openend of dress seat endoporus is stretched out, and the top of described cylinder is provided with cylinder charging aperture；In described cylinder it is
Heart valve pocket；
Needle, described needle is assemblied in described mounting seat through the valve pocket of each described cylinder；
Nozzle, described nozzle is located at each described cylinder and is stretched out the end of mounting seat one end, described nozzle afterbody
It is provided with nozzle bore；
Wherein, described needle forms tapping channel, described tapping channel and discharging discrimination with the gap of described valve pocket
Mouth communicates, and described nozzle bore communicates with tapping channel.
3D printing multichannel extension jet nozzle valve the most according to claim 1, it is characterised in that when
Nozzle is set to several, and the bore of each described nozzle bore is different.
3D printing multichannel extension jet nozzle valve the most according to claim 2, it is characterised in that institute
The aperture stating nozzle bore arranges from small to large.
3D printing multichannel extension jet nozzle valve the most according to claim 1, it is characterised in that institute
Stating cylinder uses fluid force-transmitting mode to axially move in described mounting seat endoporus.
3D printing multichannel extension jet nozzle valve the most according to claim 4, it is characterised in that institute
Upper and lower section of the endoporus stating mounting seat is respectively equipped with cylinder epimere outer peripheral edge and hypomere outer peripheral edge touching position
Upper seal and lower seal.
3D printing multichannel extension jet nozzle valve the most according to claim 5, it is characterised in that institute
State cylinder stage casing on described between seal and described lower seal and be provided with the cylinder cylinder of enlarged-diameter.
3D printing multichannel extension jet nozzle valve the most according to claim 6, it is characterised in that institute
State cylinder cylinder side wall and be provided with at least one annular groove.
3D printing multichannel extension jet nozzle valve the most according to claim 4, it is characterised in that institute
Stating mounting seat subsection setup, each section is locked by fastening bolt.
3D printing multichannel extension jet nozzle valve the most according to claim 6, it is characterised in that institute
Fill and present slipper seal material in stating annular groove, made described cylinder seal with mounting seat endoporus and be slidably connected.
3D printing multichannel extension jet nozzle valve the most according to claim 9, it is characterised in that institute
Stating slipper seal material is solid-state slipper seal material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610387141.2A CN105889571B (en) | 2016-06-01 | 2016-06-01 | 3D printing multichannel extension jet nozzle valve and nozzle valve control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610387141.2A CN105889571B (en) | 2016-06-01 | 2016-06-01 | 3D printing multichannel extension jet nozzle valve and nozzle valve control system |
Publications (2)
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| CN105889571A true CN105889571A (en) | 2016-08-24 |
| CN105889571B CN105889571B (en) | 2018-10-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017206127A1 (en) * | 2016-06-01 | 2017-12-07 | 深圳万为智能制造科技有限公司 | Multi-channel telescopic nozzle valve for 3d printing, and nozzle valve control system |
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| CN205781082U (en) * | 2016-06-01 | 2016-12-07 | 深圳万为智能制造科技有限公司 | Novel 3D printing multichannel extension jet nozzle valve and nozzle group valve control system |
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| US4907741A (en) * | 1987-04-09 | 1990-03-13 | Acumeter Laboratories, Inc. | Poppet-valve-controlled fluid nozzle applicator |
| US5340433A (en) * | 1989-10-30 | 1994-08-23 | Stratasys, Inc. | Modeling apparatus for three-dimensional objects |
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| WO2017206127A1 (en) * | 2016-06-01 | 2017-12-07 | 深圳万为智能制造科技有限公司 | Multi-channel telescopic nozzle valve for 3d printing, and nozzle valve control system |
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| Publication number | Publication date |
|---|---|
| CN105889571B (en) | 2018-10-12 |
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Effective date of registration: 20210922 Address after: 310005 room 11a-1, No. 356, Hushu South Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang guangpaizhizao Technology Co.,Ltd. Address before: 518105 room 912, Huamei building, No. 1, Huamei Road, Songgang street, Bao'an District, Shenzhen, Guangdong Province Patentee before: Shenzhen Wanwei Intelligent Manufacturing Technology Co.,Ltd. |