CN105889571B - 3D printing multichannel extension jet nozzle valve and nozzle valve control system - Google Patents
3D printing multichannel extension jet nozzle valve and nozzle valve control system Download PDFInfo
- Publication number
- CN105889571B CN105889571B CN201610387141.2A CN201610387141A CN105889571B CN 105889571 B CN105889571 B CN 105889571B CN 201610387141 A CN201610387141 A CN 201610387141A CN 105889571 B CN105889571 B CN 105889571B
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- Prior art keywords
- cylinder
- mounting base
- nozzle
- endoporus
- valve
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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 kind of 3D printing multichannel extension jet nozzle valve, including mounting base, epimere is equipped with feeding-passage, in its hypomere it is axially distributed there are one or several endoporus, feeding-passage is equipped with discharging discrimination mouth, and discharging discrimination mouth is communicated with the upper end of each endoporus respectively, and endoporus lower end is opening；Cylinder is mounted in the endoporus of each mounting base, and cylinder is stretched out from the open end of mounting base endoporus, and cylinder top is equipped with cylinder feed inlet；It is hollow valve chamber in cylinder；Needle passes through the valve chamber of each cylinder to be assemblied in mounting base；Nozzle, is set to the end that each cylinder stretches out mounting base one end, and nozzle tail portion is equipped with nozzle bore；The gap of needle and valve chamber forms tapping channel, is communicated with discharging discrimination mouth, nozzle bore is communicated with tapping channel.The extension jet nozzle valve material of the present invention is not easy to leak, block, and stability is good, of good reliability, easy to use, novel in design, highly practical, is obviously improved 3D printing efficiency, and economic value is high.
Description
Technical field
The present invention relates to 3D printing technique field more particularly to a kind of 3D printing multichannel extension jet nozzle valves, further relate to
Nozzle valve control system.
Background technology
3D printing is successively to increase material by 3D printing equipment according to designed 3D models to manufacture three-dimensional objects
Technology.This successively stack shaping technology is also referred to as increasing material manufacturing.3D printing combines digital modeling techniques, Electromechanical Control
The cutting edge technology of the numerous areas such as technology, information technology, material science and chemistry is one kind of rapid shaping technique, is known as
The core technology of " the third time industrial revolution ".Compared with traditional manufacturing technology, 3D printing need not manufacture mold in advance, it is not necessary to make
A large amount of material is removed during making, also final products is can be obtained by without going through complicated forging technology, therefore, is producing
On may be implemented structure optimization, save material and save the energy.3D printing technique is suitable for new product development, quick-acting single and small
Part volume manufacture, the manufacture of complicated shape part, the design of mold with manufacture etc., be also suitable for difficult-to-machine material manufacture,
Configuration design inspection, assembly test and Rapid reverse engineering etc..Therefore, 3D printing industry receives more and more extensive both at home and abroad
Concern will become next tool rising industry with broad prospects for development.Currently, 3D printing has been applied to product prototype, mold
The fields such as manufacture, art creation product, jewelry-making, the conventional fine processing technology that these alternative fields are relied on.Except this
Except, in the fields such as bioengineering and medicine, building, clothes, broader hair has also been opened up in the introducing of 3D printing technique for it
Open up space.
It is needed in fusion sediment (FDM) type 3D printing technique system using spray nozzle device, however existing spray nozzle device
There is following problems：
1, nozzle diameter not can be switched, and printing outer profile uses same nozzle with the internal filling of printing, cannot will be external
The high-precision requirement of profile and the low precision flying print demand of inside filling meet simultaneously；
2, when print procedure proceeds to clear area, printed material cannot immediately turn off, because even stopping printed material
It squeezes out, the hot melt materials rested in nozzle can also continue to flow out nozzle under the action of thermally expanding and gravity, therefore hold
Easily leak, meanwhile, material leakage also can the pressure of nozzle interior change, behind clear area of passing by, print again again
When, one section of pressure instability is had, to flaw occur；
3, when being printed on same printer there are two types of above material needs, more than two different printing nozzles exist
It on same plane, can interfere with each other, the nozzle not used can scratch that another nozzle is printed, material table of ot-yet-hardened
Face.
Invention content
A kind of flexible spray of 3D printing multichannel is provided it is an object of the invention to overcome the deficiency of the above-mentioned prior art
Mouth valve, extension jet nozzle valve using the present invention, nozzle diameter can switch, and when printing fine outer profile, be switched to small-bore
Nozzle, then using the heavy caliber nozzle much larger than hand line nozzle, makes printing when the printing not inside filling of required precision
Speed promotes several times；When printing proceeds to clear area, printed material can be from the end of nozzle bore by between needle and nozzle
Mechanical force cuts material, and maintains internal pressure and be unlikely to change because material leaks, when clear area of passing by prints again,
Pressure, which need not be rebuild, makes printing more stablize；When two or more materials print on same printer or use two kinds of mouths
When the different nozzle of diameter, the nozzle not used automatically has left the plane printed during shutdown, will not be to
Plane through printing has any scuffing.
To achieve the above object, the present invention provides a kind of 3D printing multichannel extension jet nozzle valve, including：
Mounting base, the epimere of the mounting base are equipped with feeding-passage, it is axially distributed in the mounting base hypomere there are one
Or several endoporus, the feeding-passage are equipped with discharging discrimination mouth, the discharging discrimination mouth is communicated with the upper end of each endoporus respectively, described
The lower end of endoporus is opening；
Cylinder, the cylinder are moveably mounted in the endoporus of each mounting base, and the cylinder is out of mounting base
The open end in hole is stretched out, and the top of the cylinder is equipped with cylinder feed inlet；It is a hollow valve chamber in the cylinder；
Needle, the needle pass through the valve chamber of each cylinder to be assemblied in the mounting base；
Nozzle, the nozzle are set to the end that each cylinder stretches out mounting base one end, and the nozzle tail portion is equipped with spray
Nozzle aperture；
Wherein, the gap of the needle and the valve chamber forms tapping channel, and the tapping channel is communicated with discharging discrimination mouth,
The nozzle bore is communicated with tapping channel.
Preferably, when nozzle is set as several, the bore of each nozzle bore is different.
Preferably, the aperture of the nozzle bore arranges from small to large.
Preferably, the cylinder is axially moved using fluid force-transmitting mode in the mounting base endoporus.
Preferably, the upper and lower section of the endoporus of the mounting base and cylinder epimere outer peripheral edge and hypomere outer peripheral edge touching position
It is respectively equipped with upper seal and lower seal.
Preferably, stage casing of the cylinder between the upper seal and the lower seal is equipped with the cylinder of enlarged-diameter
Body cylinder.
Preferably, the cylinder cylinder side wall is equipped with an at least annular groove.
Preferably, the mounting base subsection setup, each section is locked by fastening bolt.Fastening bolt can be located at installation
Seat is internal, to lock each section from internal.
Preferably, it has been filled and presented in the annular groove and has been slidingly sealed material, the cylinder is made to be sealed simultaneously with mounting base endoporus
It is slidably connected.
Preferably, the material that is slidingly sealed is that solid-state is slidingly sealed material.
Preferably, it is expanded graphite that the solid-state, which is slidingly sealed material,.
Preferably, there are first fluid room, the cylinder cylinder and lower seal between the cylinder cylinder and upper seal
Between have second fluid room.
Preferably, the first fluid room is connected by first fluid through-hole with first fluid valve.
Preferably, the second fluid room is connected by second fluid through-hole with second fluid valve.
Preferably, the top or side of the needle are connected at least one positioning bolt, and the positioning bolt will be described
Needle is fixed on the endoporus upper surface of the mounting base.It is of course also possible to use other positioning devices, to consolidating needle
It is scheduled in mounting base, alternatively, the epimere of needle directly forms an overall structure with mounting base.
Preferably, the positioning screw stretch on the outside of the mounting base mounting base and with the top locking of the needle.
Preferably, the epimere of the cylinder is equipped with a limit straight slot, the limit of the limit straight slot and needle top-side
Key is slidably matched that cylinder feed inlet is made to be aligned with discharging discrimination mouth.
Preferably, the periphery of the mounting base is equipped with heating device.
Preferably, the heating device is electric heater unit.
Preferably, the epimere of the mounting base is additionally provided with a feeding-passage；A screw rod is additionally provided in the feeding-passage；Institute
The lower end and discharging discrimination mouth, cylinder feed inlet for stating feeding-passage are sequentially connected.
Preferably, the tail portion conical surface of the needle, which expands, blocks the nozzle bore, the diameter expanded and nozzle bore phase
It adapts to.
Preferably, step surface or the conical surface are equipped in the nozzle, under nozzle closed state, the step surface or the conical surface with
The tail portion taper-face contact of needle；It is then disengaged under nozzle opening state.
Preferably, during the shift motion disengaged, effective flow area of nozzle bore continuously changes the cylinder
Become, the flow in adjustable nozzles hole is from zero to maximum value.
As a kind of equivalent way, the cylinder is fixedly installed in the mounting base, and the needle is in the cylinder
Valve chamber in move up and down, block the nozzle bore in the lower position of needle shift motion, can in mobile stroke
The flow of nozzle bore is adjusted from zero to maximum value.
Preferably, there are four cylinder settings, there are four the needle that matches with the cylinder is also provided with.
Preferably, further include having pressed gas channel, further include being surrounded on the cylinder lateral wall and being set to the peace
The circular gas chamber on seat endoporus madial wall is filled, the one end in the pressed gas channel is communicated with the external world, the other end and circular gas
Room communicates, and is continually fed into pressed gas in gas chamber by pressed gas channel, and the pressure of pressed gas is more than or equal to
The pressure of molten state printed material in tapping channel makes the printed material of molten state can not be from cylinder lateral wall and mounting base endoporus
Gap location flows out.
Preferably, multiple pressed gas channels axially can be also set along the cylinder, around gas chamber.Make cylinder lateral wall shape
At multiple airtight seal rings.Solve the problems, such as that single circular air chamber pressure is decayed too fast, stability, reliability are more preferably.
The present invention also provides a kind of nozzle valve control systems, including：
Control circuit；
Fluid source, the fluid source are passed through under the control of control circuit to second fluid room, first fluid room controlled
Pressure fluid realizes the opening and closing of nozzle to drive cylinder to move up and down.
Preferably, fluid source supplies gas, such as nitrogen, air or other inert gases.
The beneficial effects of the invention are as follows：
1, extension jet nozzle valve using the present invention, nozzle diameter can switch, and when printing fine outer profile, be switched to small
Bore nozzle, then using the heavy caliber nozzle much larger than hand line nozzle, makes when the printing not inside filling of required precision
Print speed promotes several times.
2, when printing proceeds to clear area, printed material can be from the end of nozzle bore by the machinery between needle and nozzle
Power cuts material, and maintains internal pressure and be unlikely to change because material leaks, and when clear area of passing by prints again, is not required to
Rebuilding pressure makes printing more stablize.
When 3, being printed on same printer when two or more materials or using two kinds of different nozzles of bore, do not make
Nozzle automatically has left the plane printed during shutdown, will not have to the plane printed any
Scuffing.
4, the present invention using fluid force-transmitting control, fluid can be gas, liquid, liquid metal, flowable powder, can
The particle etc. of flowing, the opening and closing for the multiple nozzles of control that high-temperature region of the fluid valve far from printing can be long-range.
5, in addition to above-mentioned beneficial functions, when there is large area to fill print zone, there can be the ejection 3D that multiple channels are concurrent
Printing material can greatly promote print speed；In addition, multichannel concurrently discharges there is also several modes, adjacent two
A channel is discharged simultaneously to accelerate to fill；Three adjacent channels are discharged simultaneously to accelerate to fill；Interval two or
Three channels are discharged simultaneously to accelerate to fill；Whole channels are discharged simultaneously to accelerate to fill；When accelerating to fill, in sequential
Each nozzle opening and closing can also be controlled, and when such as closing on end-of-fill, close the larger nozzle of bore successively.
6, mounting base of the invention is arranged using segmented, convenient for being installed to expanded graphite, is filled using expanded graphite
Very reliable when being slidingly sealed material, extension jet nozzle valve is to work at high temperature, and common sealing material is difficult to steady at high temperature
Fixed to exist, expanded graphite thermally expands generate lasting pressure to sealing position in advance, while can serve as kollag reduction again and rub
Power is wiped, when sealing surface wear, the expansion of expanded graphite can make sealing surface automatically derive compensation, therefore use expanded graphite
Can long-term realization reliably seal.
7, when nozzle and needle taper-face contact Connexin variation of the present invention, the flow of printed material can be adjusted, may be used also
With the different flow combination of multiple nozzles to adapt to more complicated printing demand；
8, stability of the present invention is good, of good reliability, easy for operation, novel in design, highly practical, easy to spread to answer
With.
Description of the drawings
Fig. 1 is the diagrammatic cross-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 numeral：
Mounting base 10；Feeding-passage 11；Discharge discrimination mouth 111；Screw rod 112；
Cylinder 20；Upper seal 201；Lower seal 202；Cylinder cylinder 21；Annular groove 211；
Needle 30；Positioning bolt 31；Positive stop key 32；
Tapping channel 40；Cylinder feed inlet 401；Limit straight slot 402；
First fluid room 51；First fluid through-hole 511；Second fluid room 52；Second fluid through-hole 521；
Around gas chamber 53；Pressed gas channel 531；
Nozzle 60；Nozzle bore 601；
Heating device 80.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, do not indicate or imply the indicated device or element must have a particular orientation, with spy
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connects, and can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
It please refers to Fig.1 and Fig. 3, the present invention provides a kind of 3D printing multichannel extension jet nozzle valve, solve print procedure
The problem that 60 bore of middle nozzle not can be switched comprising mounting base 10, cylinder 20, needle 30 and nozzle 60, wherein the installation
One or several endoporus are arranged along the axial direction of in seat 10, the top or side of each endoporus are provided with discharging discrimination mouth 111；Institute
Cylinder 20 to be stated to be moveably mounted in each endoporus of the mounting base 10, the cylinder 20 is stretched out from 10 one end of mounting base,
The top of each cylinder 20 is equipped with the cylinder feed inlet 401 being oppositely arranged with the discharging discrimination mouth 111；Each cylinder
The valve chamber being arranged along its axial direction is equipped in 20；Each needle 30 passes through the valve chamber of corresponding cylinder 20 and fixation
In the mounting base 10, the gap of the needle 30 and the valve chamber is formed and the cylinder feed inlet 401 conducting
Tapping channel 40；The nozzle 60 is set to the end that each cylinder 20 stretches out 10 one end of mounting base, 60 tail portion of the nozzle
Equipped with nozzle bore 601.The all parts of the present invention may be used metal and be made, such as iron or other alloy materials.The nozzle
60 are connect with cylinder 20 using spiral.In order to increase the capacity of feeding-passage 11, the stage casing diameter of the needle 30 reduces, certainly
The stage casing internal diameter increase of cylinder inboard wall can also realize said function.
In the above-described embodiments, by setting cylinder 20, needle 30 dynamically to open or close tapping channel 40, into
And supply status of the 3D printing with hot material is controlled, the present invention is suitable for the material organization of supply of 3D printer, can also
For in other spraying equipments.The present invention can be used cooperatively with material extruder, using existing 3D printing extruder with
The present invention 60 valve of extension jet nozzle be combined, belong to the scope of protection of the present invention within.
One embodiment of the present of invention, when nozzle 60 is set as several, the bore of each nozzle bore 601 is different, small
Its printing precision of the nozzle 60 of bore is high, its discharging speed of bigbore nozzle 60 is fast.
The aperture of one embodiment of the present of invention, the nozzle bore 601 arranges from small to large.
One embodiment of the present of invention, the apertures of multiple nozzle bores 601 in direction pivots clockwise or counter-clockwise or
It is arranged according to arithmetic progression or Geometric Sequence in rectilinear direction.
1, the general term formula of arithmetic progression：An=a1+ (n-1) * d, a1=2, d=2, n is the integer more than or equal to 2.
2, the general term formula of Geometric Sequence：An=a1*qn-1, a1=2, q=2, n is the integer more than or equal to 2.
For four nozzles 60 are set：Four nozzles 60 can linearly direction arrangement；Can also be arranged in a ring,
Circumferentially another nozzle 60 can be distributed with three to be distributed at dot；The bore of four nozzles 60 can be 2mm, 4mm,
6mm、8mm；Can also be 2mm, 4mm, 8mm, 16mm.If being of a straight line type arrangement, the apertures of this four nozzles 60 according to 2mm,
4mm, 6mm, 8mm or 2mm, 4mm, 8mm, 16mm are ranked sequentially；If four nozzles 60 are substantially arranged according to annular, clockwise
Or in counter clockwise direction, the aperture of this four nozzles 60 is according to 2mm, 4mm, 6mm, 8mm or 2mm, 4mm, 8mm, 16mm sequence
Arrangement；If circumferentially another nozzle 60 is distributed at dot for three distributions, by side clockwise or counter-clockwise on circumference
To three 60 bores of nozzle, according to 2mm, 4mm, 6mm, either 2mm, 4mm, 8mm are ranked sequentially at dot as 8mm or 16mm.
Situation is also existed as follows for four nozzles 60 of setting：601 bore of nozzle bore of four nozzles 60 is ordered respectively
601 bore A of entitled nozzle bore, 601 bore B of nozzle bore, 601 bore C of nozzle bore, 601 bore D of nozzle bore, then four nozzles 60
Bore be likely to be：
1,601 bore A=nozzle bores of nozzle bore, 601 bore B=nozzle bores, 601 bore C<601 bore D of nozzle bore；
2,601 bore A=nozzle bores of nozzle bore, 601 bore B<601 bore C=nozzle bores of nozzle bore, 601 bore D；
3,601 bore A=nozzle bores of nozzle bore, 601 bore B<601 bore C of nozzle bore<601 bore D of nozzle bore；
4,601 bore A of nozzle bore<601 bore B=nozzle bores of nozzle bore, 601 bore C=nozzle bores, 601 bore D；
These above-mentioned situations also belong within protection scope of the present invention.It further says, if setting three or five
When a or six or eight or more nozzles 60, there is also above-mentioned variation situations for bore, this belongs to the protection of the present invention
Within the scope of.Referring to Fig. 2, when nozzle 60 is arranged six, the bore of nozzle 60 can be 2mm, 4mm, 8mm, 16mm, 32mm
Or 2mm, 4mm, 6mm, 8mm, 10mm.
Assuming that nozzle 60 is arranged 8, be divided into two groups, every group include four bores time variation nozzle 60, then when a certain
When a certain nozzle 60 in group is blocked or needed replacing, it can be replaced using another group, to realize redundancy.According to spray
The quantity for holding susceptible to plugging hand line nozzle 60 can be set as multiple by the difference of 60 frequency of use of mouth, increase equipment operation
Reliability can enable the nozzle 60 of another identical bore in time when a certain hand line nozzle 60 blocks, make print procedure
Successively.5 nozzles 60 are such as set, bore be respectively 2mm, 2mm, 4mm, 6mm, 8mm or 2mm, 2mm, 4mm, 8mm,
16mm.Nozzle 60 is arranged on 60 valve of nozzle multigroup, to promote redundancy, enhances the improvement of equipment dependability, belong to this
Within the protection domain of invention.
One embodiment of the present of invention, it is further to the motion mode of cylinder 20 to be limited：The cylinder 20 uses gas
Flowing mode or mode of surging axially move in 10 endoporus of the mounting base.Further, the cross section of the endoporus is in circle
Shape.Hydraulic oil or liquid metal or flowable powder or flowable particle etc. may be used in the mode of surging.Using pneumatic mode
Highly preferred mode, at high temperature, gas is heated be not easily decomposed it is rotten；Such as use air.
In the above-described embodiments, by controlling the 20 axial movement state of cylinder controlling opening for tapping channel 40
It closes, when the movement of cylinder 20 makes nozzle 60 leave needle 30, printed material is flowed out from nozzle bore 601.When the movement of cylinder 20 makes spray
When mouth 60 contacts needle 30, needle 30, cylinder 20 and nozzle 60 form enclosed construction, at this point, material is not from tapping channel 40
Outflow.At this point it should be noted that in synchronization, can there are one or several nozzles 60 be opened and closed, at this point, the flexible spray of the present invention
The supply of concurrent type frog multichannel material also can be achieved at the same time in the switching that 60 valve of mouth realizes 60 bore of nozzle.
Outside one embodiment of the present of invention, the upper-lower section of 10 endoporus of the mounting base and 20 epimere outer peripheral edge of cylinder and hypomere
Periphery touching position is respectively equipped with upper seal 201 and lower seal 202.The cylinder 20 is in the upper seal 201 and institute
It states the stage casing between lower seal 202 and also has the widened cylinder cylinder 21 (being a piston when specific manufacture) of a diameter.Institute
It states 21 side wall of cylinder cylinder and is equipped with an at least annular groove 211.The upper seal 201 and lower seal 202 are filled and presented for one
There is solid-state to be slidingly sealed the slot of material, such as fills and presents expanded graphite.The quantity of the cylinder cylinder 21 can also be arranged several.
In the above-described embodiments, one or several annular grooves 211, each annular can be set on the cylinder cylinder 21
The depth and width of groove 211 are not particularly limited, and the shape of the annular groove 211 can not also rule.The annular groove
211 section is arc-shaped, V-arrangement or other shapes.
One embodiment of the present of invention, 21 side wall of cylinder cylinder are equipped with two annular grooves 211 of interval setting.More
Further, the shape of two annular grooves 211 is identical.
In order to further enhance the sealing performance of the present invention, one embodiment of the present of invention is filled out in the annular groove 211
It is formed with and is slidingly sealed material, the cylinder 20 is made to seal and be slidably connected with 10 endoporus of mounting base.
Specifically, the material that is slidingly sealed is that solid-state is slidingly sealed material.
More specifically, it is expanded graphite that the solid-state, which is slidingly sealed material,.
One embodiment of the present of invention has first fluid room 51 between the cylinder cylinder 21 and upper seal 201, described
There is second fluid room 52 between cylinder cylinder 21 and lower seal 202.More specifically, the pressure in the first fluid room 51
Value is consistently greater than the pressure value equal to tapping channel 40, and therefore, the printed material in tapping channel 40 will not be along 20 outside of cylinder
Leakage, plays the role of pressure seal, first fluid room 51, second fluid room 52 are a sealing spaces, when 60 valve work of extension jet nozzle
After work, it is connected with fluid always in the first fluid room 51, to maintain sealing performance.Due to the fluid pressure of first fluid room 51
Power is higher than the pressure of tapping channel 40, and the material in tapping channel 40 is not in leakage.Reach hermetic seal or hydraulic seal
Effect.
One embodiment of the present of invention, the second fluid room 52 are connected by second fluid through-hole 521 with fluid source, institute
Second fluid room 52 is stated there are two atmospheric pressure states, first state is that the pressure value of second fluid room 52 is higher than the first fluid
The pressure value of room 51, at this point, the cylinder 20 is in the state that moves upwards, the top of nozzle 60 is closed to 30 tapping channel 40 of needle；
Second state is that the pressure value of second fluid room 52 is less than the pressure value of the first fluid room 51, at this point, at the cylinder 20
In the state of stretching, tapping channel 40 is opened.In addition, further expand, the first fluid room 51, second fluid room 52 can be with
Location swap, but its control method is adjusted accordingly.
One embodiment of the present of invention, the first fluid room 51 pass through first fluid through-hole 511 and first fluid valve phase
Even.The second fluid room 52 is connected by second fluid through-hole 521 with second fluid valve, by the way that first fluid valve, the is arranged
The opening and closing of first fluid through-hole 511, second fluid through-hole 521 described in two fluid valve distributed controlls.
One embodiment of the present of invention, it is (excellent that the top or side of the needle 30 are connected at least one positioning bolt 31
Choosing is set as two), the needle 30 is fixed on the endoporus upper surface of the mounting base 10 by the positioning bolt 31.It is described fixed
Position screw from the outside of mounting base 10 stretch into the mounting base 10 and with the top locking of the needle 30.
The epimere of one embodiment of the present of invention, the cylinder 20 is equipped with a limit straight slot 402, the limit straight slot 402
It is slidably matched that cylinder feed inlet 401 is made to be aligned with discharging discrimination mouth 111 with the positive stop key 32 of 30 top-side of needle, wherein
The whole needle 30 is in inverted L-shaped, is positive stop key 32 at horizontal buckling.When cylinder 20 slides up and down, the cylinder charging
Mouth 401 can also be aligned with deflector chute.
The outside of one embodiment of the present of invention, the mounting base 10 is equipped with heating device 80.It is best as the present invention one
Embodiment, the heating device 80 are electric heater unit 80.In 10 outside setting heating device 80 of the mounting base to going out
Expect the material heat preservation in channel 40.
The epimere of one embodiment of the present of invention, the mounting base 10 is additionally provided with a feeding-passage 11；The feeding-passage
A screw rod 112 is additionally provided in 11；The lower end of the feeding-passage 11 is sequentially led with discharging discrimination mouth 111, cylinder feed inlet 401
It is logical.
(being such as in fusiform) is expanded to block the nozzle bore in the tail portion of one embodiment of the present of invention, the needle 30
601, enlarged diametric is adapted with 601 diameter of nozzle bore, and the tail portion expanded also has the conical surface, and the end of the needle 30 is in point
End.It is come under within protection scope of the present invention in this way, the tail portion of needle 30 is carried out various modifications.
One embodiment of the present of invention, the nozzle 60 is interior to be equipped with step surface or the conical surface, the step surface and 30 tail of needle
The cone brought into linear contact in portion or face contact.In this way, being contacted by using line, adhesion is less likely to occur with nozzle 60 for hot material,
It avoids nozzle 60 from blocking, the stability of 60 valve of nozzle is made to enhance.
One embodiment of the present of invention, there are four the settings of the cylinder 20, the needle 30 to match with the cylinder 20
There are four settings.Further, it is also possible to which cylinder 20 is arranged six (please referring to Fig. 3) or more.It is mutually parallel between cylinder 20,
But the spacing between cylinder 20 might not be identical.
For the ease of installation, 10 subsection setup of the mounting base, adjacent two sections are fixedly connected.That is, the mounting base 10
It is arranged by the way of lamination, a fastening bolt is additionally provided with inside the mounting base 10, fixes mounting base 10.In addition,
It is additionally provided with partition board or gasket etc. between 10 each lamination of mounting base.In addition, in order to fix mounting base 10, can also use
Such as under type：It is welded between adjacent two sections；Or；10 subsection setup of the mounting base uses bolt between adjacent two sections
Connection.
In addition, a kind of deformation as the present invention, when 4 endoporus of setting in the mounting base 10, material is from discharging discrimination mouth
111 are distributed to 4 tapping channels 40, this substantially realizes a kind of function (one into four goes out) of five-way valve (multiple-way valve), in this way,
If the internal structure of the present invention is transformed into five-way valve, it can also achieve the object of the present invention, this belongs to the conventional of the present invention and becomes
Shape.
In order to be controlled with multichannel extension jet nozzle valve above-mentioned 3D printing, invention additionally discloses a kind of 60 valves of nozzle
Control system, including control circuit；Fluid source, the fluid source is under the control of control circuit to second fluid room 52, first
Fluid chamber 51 is passed through gas, to drive cylinder 20 to move up and down, realizes the opening and closing of nozzle 60.It further include pressure measurement dress
It sets, the device for pressure measurement is used to measure the gas pressure of the second fluid room 52, first fluid room 51；The pressure is surveyed
Amount device is connected with control circuit, the parameter feedback control second fluid room that the control circuit is returned according to device for pressure measurement
52, the pressure value of first fluid room 51, 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 a technical solutions：The fluid source is hydraulic pressure system
System, the hydraulic system are passed through hydraulic oil to second fluid room 52, first fluid room 51 under the control of control circuit, pass through control
Oil pressure value in second fluid room 52 processed, first fluid room 51 is controlling the motion state of cylinder 20, nozzle 60.
One embodiment of the present of invention further includes a signal trigger module, and the signal trigger module is in 3D printing formula
Triggering under to control circuit send trigger signal；The control circuit according to trigger signal to first fluid valve and or second
Fluid valve sends control signal, it is specific control first fluid through-hole 511 and or second fluid through-hole 521 be turned on and off.
One embodiment of the present of invention, first fluid through-hole 511 maintain a normally open state, and the fluid source is in control circuit
Control is lower to be continued to be passed through gas to first fluid room 51.
The pressure value of one embodiment of the present of invention, the first fluid room 51 is practical higher than 40 printed material of tapping channel
Pressure.More specifically, the pressure value of the first fluid room 51 can reach upper limit of pressure threshold value higher than tapping channel 40.
As a kind of embodiment deteriorated, the cylinder 20 is fixedly installed in the mounting base 10, the needle
30 move up and down in the valve chamber of the cylinder 20, and the nozzle bore 601 is blocked in the lower position of 30 shift motion of needle,
The flow in adjustable nozzles hole 601 is from zero to maximum value in mobile stroke.
For more expanding, the cylinder 20 can also use electromagnetism power drive, under the driving of electromagnetic force, the cylinder
20 realize up and down motion.In addition, cylinder 20 can also use mechanical power drive to pass through if the side of cylinder 20 is connected with connecting rod
Connecting rod drives cylinder 20 to move up and down.The kinds of drive such as chain, gear, lead screw can also be used, it can also will in the prior art
How simple deformation is done by the mechanism of engine driving reciprocating motion of the pistons applies among this present invention, these driving cylinders 20 are past
Deformation, the transformation of multiple motion mode belong within protection scope of the present invention.
Referring to Fig. 1, in order to realize hermetic seal function, avoid the molten state material in tapping channel 40 on the outside of cylinder 20
Gap location outflow between wall, 10 endoporus of mounting base, and loss of material is caused, and contamination and plugging cylinder 20, make the past of cylinder 20
Multiple retard motion, in order to solve the technical problem, the present invention provides a technical solution：Further include having pressed gas channel 531, also
Including the circular gas chamber 53 for being surrounded on 20 lateral wall of the cylinder and being set on 10 endoporus madial wall of the mounting base, the pressure
One end of power gas passage 531 is communicated with the external world, and the other end 53 is communicated with around gas chamber, by pressed gas channel 531 to
Pressed gas is continually fed into gas chamber 53, and the pressure of pressed gas is more than or equal to molten state in tapping channel 40 and prints material
The pressure of material makes the printed material of molten state that can not be flowed out from 20 lateral wall of cylinder and 10 endoporus gap location of mounting base.The ring
It is an annular groove being circumferentially positioned on 10 endoporus madial wall of mounting base around gas chamber 53.Due to 20 outside of 10 endoporus of mounting base and cylinder
Gap very little between wall, gas have the pressure loss by close gap, it is therefore assumed that a pressed gas channel 531 is only set,
Gas circumferentially cannot be isobaric around 20 lateral wall of cylinder, and then is unable to reach the anti-leak function of annular.Certainly, if gas chamber will be surround
53 features remove, and a pressed gas channel 531 is only arranged to realize hermetic seal, as a kind of deterioration scheme of the invention：
The pressure value for being passed through gas from pressed gas channel 531 is improved, then can be more than in the circumferentially upper gas pressure of 20 lateral wall of cylinder
11 molten state of feeding-passage prints the pressure of material, then also belongs within protection scope of the present invention.If increasing in mounting base 10
Gap between 20 lateral wall of hole and cylinder, then widened gap be equivalent to above-mentioned circular gas chamber 53, this belong to the present invention
Conventional deformation and transformation, also within protection scope of the present invention.If printed material has chemical reaction with air, can be passed through
Inert gas or nitrogen avoid the property of printed material from changing.
Further, multiple pressed gas channels 531 axially can be also set along the cylinder 20, surrounding gas chamber 53.
20 lateral wall of cylinder is set to form multiple airtight seal rings.Solve the problems, such as that single 53 decline of pressure of circular gas chamber is too fast, setting is single
Around gas chamber 53, the pressure at gas chamber 53 is maximum, decays to 20 pressure at both sides of cylinder, by the way that two or more are arranged
Circular gas chamber 53, the distribution of the gap location air pressure of 20 lateral wall of cylinder and 10 endoporus of mounting base in axial direction is no longer in
Now simple state small in ends broad in the middle, and become gas distribution more stable homogeneous, stability, reliability are more preferably.
Operation principle：Hot material enters discharging discrimination mouth 111, discharging discrimination mouth 111 and several cylinders from feeding-passage 11
Body feed inlet 401 communicates, and hot material pours in tapping channel 40.When the second fluid room 52 on cylinder 20 is no longer passed through gas
Body, the air pressure of second fluid room 52 is less than the atmospheric pressure value of the first fluid room 51, at this point, cylinder 20 is in first fluid room 51
It is ejected under thrust, tapping channel 40 is opened, and material is sprayed from nozzle bore 601；When the second fluid room 52, first-class on cylinder 20
Body room 51 is passed through gas, and when the air pressure of second fluid room 52 is higher than the pressure of first fluid room 51, and the cylinder 20 is the
It is withdrawn under the thrust of two fluid chamber 52, tapping channel 40 is closed, and material cannot flow out (ejection) from nozzle bore 601.It certainly, if will
First fluid room 51, second fluid room 52 it is out of position, then only need by control both pressure difference, and then control cylinder
20 motion state is the opening and closing of 60 valve of controllable extension jet nozzle.It further says, is only to be above with pressure control
Example illustrates principle, and the present invention can also use other fluid (such as hydraulic oil, liquid metals, mobility powder, mobility
Grain etc.).Present invention preferably employs four nozzles 60, the bore of each nozzle 60 can be arranged as required to (under normal circumstances, four
The caliber series of a nozzle 60 change), when needing 60 outputting material of nozzle of a certain bore, can by control fluid source into
And the operating status of a certain cylinder 20 is controlled, and then the opening and closing of a certain cylinder 20 is controlled, certainly, the present invention also supports multiple channels
It concurrently discharges, to realize higher function.Nozzle 60 when being stretched out due to a certain nozzle 60 less than other under retracted state,
Therefore other idle nozzles 60 will not cause interference effect to material, the product to be processed of extrusion.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case of can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (18)
1. a kind of 3D printing multichannel extension jet nozzle valve, which is characterized in that including：
Mounting base, the epimere of the mounting base are equipped with feeding-passage, in the mounting base hypomere it is axially distributed there are one or number
A endoporus, the feeding-passage are equipped with discharging discrimination mouth, and the discharging discrimination mouth is communicated with the upper end of each endoporus respectively, the endoporus
Lower end be opening；
Cylinder, the cylinder are moveably mounted in the endoporus of each mounting base, and the cylinder is from mounting base endoporus
Open end is stretched out, and the top of the cylinder is equipped with cylinder feed inlet；It is a hollow valve chamber in the cylinder；
Needle, the needle pass through the valve chamber of each cylinder to be assemblied in the mounting base；
Nozzle, the nozzle are set to the end that each cylinder stretches out mounting base one end, and the tail portion of the nozzle is equipped with nozzle
Hole；
Wherein, the gap of the needle and the valve chamber forms tapping channel, and the tapping channel is communicated with discharging discrimination mouth, described
Nozzle bore is communicated with tapping channel；
The cylinder is axially moved using fluid force-transmitting mode in the mounting base endoporus；
The upper and lower section of the endoporus of the mounting base is respectively equipped with upper close with cylinder epimere outer peripheral edge and hypomere outer peripheral edge touching position
Sealing and lower seal；
Stage casing of the cylinder between the upper seal and the lower seal is equipped with the cylinder cylinder of enlarged-diameter；
The cylinder cylinder side wall is equipped with an at least annular groove；
The mounting base subsection setup, each section is locked by fastening bolt；
It has been filled and presented in the annular groove and has been slidingly sealed material, the cylinder is made to seal and be slidably connected with mounting base endoporus.
2. 3D printing according to claim 1 multichannel extension jet nozzle valve, which is characterized in that when nozzle is set as several
A, the bore of each nozzle bore is different.
3. 3D printing according to claim 2 multichannel extension jet nozzle valve, which is characterized in that the aperture of the nozzle bore
It arranges from small to large.
4. 3D printing according to claim 1 multichannel extension jet nozzle valve, which is characterized in that described to be slidingly sealed material
It is slidingly sealed material for solid-state.
5. 3D printing according to claim 4 multichannel extension jet nozzle valve, which is characterized in that the solid-state is slidingly sealed
Material is expanded graphite.
6. 3D printing according to claim 1 multichannel extension jet nozzle valve, which is characterized in that the cylinder cylinder with it is upper
There is first fluid room between sealing element, has second fluid room between the cylinder cylinder and lower seal.
7. 3D printing according to claim 6 multichannel extension jet nozzle valve, which is characterized in that the first fluid room is logical
First fluid through-hole is crossed with first fluid valve to be connected.
8. 3D printing according to claim 7 multichannel extension jet nozzle valve, which is characterized in that the second fluid room is logical
Second fluid through-hole is crossed with second fluid valve to be connected.
9. 3D printing according to claim 1 multichannel extension jet nozzle valve, which is characterized in that the top of the needle or
Side is connected at least one positioning bolt, and the needle is fixed on the endoporus upper end of the mounting base by the positioning bolt
Face.
10. 3D printing according to claim 1 multichannel extension jet nozzle valve, which is characterized in that the epimere of the cylinder
Equipped with a limit straight slot, the positive stop key of the limit straight slot and needle top-side is slidably matched to make cylinder feed inlet and go out
Expect the alignment of discrimination mouth.
11. 3D printing according to claim 10 multichannel extension jet nozzle valve, which is characterized in that outside the mounting base
Week is equipped with heating device.
12. 3D printing according to claim 11 multichannel extension jet nozzle valve, which is characterized in that the heating device is
Electric heater unit.
13. 3D printing according to claim 1 multichannel extension jet nozzle valve, which is characterized in that the mounting base it is upper
Section is additionally provided with a feeding-passage；A screw rod is additionally provided in the feeding-passage；The lower end and discharging discrimination mouth of the feeding-passage,
Cylinder feed inlet is sequentially connected.
14. 3D printing according to claim 1 multichannel extension jet nozzle valve, which is characterized in that the tail portion of the needle
The conical surface, which expands, blocks the nozzle bore, and the diameter expanded is adapted with nozzle bore.
15. 3D printing according to claim 14 multichannel extension jet nozzle valve, which is characterized in that
Step surface or the conical surface, under nozzle closed state, the tail portion of the step surface or the conical surface and needle are equipped in the nozzle
Taper-face contact；It is then disengaged under nozzle opening state.
16. 3D printing according to claim 15 multichannel extension jet nozzle valve, which is characterized in that the cylinder is being detached from
During the shift motion of contact, effective flow area of nozzle bore continuously changes, and the flow in adjustable nozzles hole is from zero to most
Big value.
17. according to claim 1 to 16 any one of them 3D printing multichannel extension jet nozzle valve, which is characterized in that described
There are four cylinder settings, there are four the needle that matches with the cylinder is also provided with.
18. according to claim 1 to 16 any one of them 3D printing multichannel extension jet nozzle valve, which is characterized in that also wrap
Pressed gas channel has been included, has further included being surrounded on the lateral wall of the cylinder and being set on the mounting base endoporus madial wall
Around gas chamber, the one end in the pressed gas channel is communicated with the external world, and the other end is communicated with around gas chamber, passes through pressed gas
Channel is continually fed into pressed gas into circular gas chamber, and the pressure of pressed gas is more than or equal to molten state printing in tapping channel
The pressure of material makes the printed material of molten state that can not be flowed out from the lateral wall of cylinder with mounting base endoporus gap location.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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)
| Publication Number | Publication Date |
|---|---|
| CN105889571A CN105889571A (en) | 2016-08-24 |
| CN105889571B true CN105889571B (en) | 2018-10-12 |
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| CN201610387141.2A Active CN105889571B (en) | 2016-06-01 | 2016-06-01 | 3D printing multichannel extension jet nozzle valve and nozzle valve control system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4907741A (en) * | 1987-04-09 | 1990-03-13 | Acumeter Laboratories, Inc. | Poppet-valve-controlled fluid nozzle applicator |
| US5121329A (en) * | 1989-10-30 | 1992-06-09 | Stratasys, Inc. | Apparatus and method for creating three-dimensional objects |
| EP1400178A1 (en) * | 2001-06-08 | 2004-03-24 | Japan Tobacco Inc. | Fluid body coater |
| DE102011110804A1 (en) * | 2011-08-22 | 2013-02-28 | Kai Parthy | Three dimensional printing head, useful for melting and depositing layers of wire-shaped materials, comprises feed channel consisting of array of highly heat-conductive materials e.g. aluminum and low heat-conductive materials e.g. PTFE |
| CN104085111B (en) * | 2014-07-11 | 2017-04-19 | 东莞中国科学院云计算产业技术创新与育成中心 | Method for controlling printing speed and precision of multi-nozzle 3D printer |
| CN204526175U (en) * | 2015-03-09 | 2015-08-05 | 广东工业大学 | A kind of multiinjector 3D printer head |
| 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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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. |