CN104389832A - Rotary digital valve and injection system of 3D (Three Dimensional) printing equipment - Google Patents
Rotary digital valve and injection system of 3D (Three Dimensional) printing equipment Download PDFInfo
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- CN104389832A CN104389832A CN201410628455.8A CN201410628455A CN104389832A CN 104389832 A CN104389832 A CN 104389832A CN 201410628455 A CN201410628455 A CN 201410628455A CN 104389832 A CN104389832 A CN 104389832A
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- groove array
- spool
- resorption
- holding groove
- intake port
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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
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/078—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted and linearly movable closure members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/112—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Sliding Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention provides a rotary digital valve. The rotary digital valve comprises a valve sleeve, a left valve core and a right valve core, wherein the left valve core and the right valve core can move axially left and right and are arranged in the valve sleeve in a synchronous rotating manner; the valve sleeve is provided with a left feed hole and a right feed hole; the circumferential surface of the left valve core is provided with a periodically distributed left receiving groove array, and the left receiving groove array is communicated with a left feeding passage; the circumferential surface of the left valve core is provided with a periodically distributed right receiving groove array, and the right receiving groove array is communicated with a right feeding passage; the proportional output quantity of the left feeding and the right feeding depends on the mechanical duty ratio formed by axial movement displacement of the left valve core and the right valve core; the opening and closing frequency of the rotary digital valve is equal to the product of the rotation speed of the synchronous rotation of the left valve core and the right valve core and the number of grooves in the left receiving groove array or the right receiving groove array. According to the rotary digital valve, high frequency response and accurate feeding can be realized through quick switching of the rotary valve core and proportional output of the double valve cores; the rotary digital valve can be applied to 3D (Three Dimensional) printing equipment.
Description
Technical field
The present invention relates to the digital valve for rapid shaping, particularly relates to a kind of accurate rotary digital valve printed for composite material 3D.
Background technique
The 3D printing of spraying based on drop is one of rapid shaping technique of most vitality, and the mode of successively being added by material breaches the bottleneck that complex parts manufacture difficulty, significantly improves manufacturing efficiency.In individual layer print procedure, in print head active chamber, fluent material forms drop under the effect of external motivating force, and is ejected into relevant position with certain frequency and speed.Therefore, stable, accurately and fast droplet ejection be the key guaranteeing 3D print quality.
Current 3D printing technique is mainly studied and is launched round aspects such as its high efficiency, accuracy and composite material printings.
(1) in efficient printing: adopt valve-regulated spray regime (as U.S. patent Nos US005988807A), larger injection flow can be obtained relative to piezoelectricity type and hot bubble type; Or adopt support liquid mode (as Chinese invention patent 200510029726.9), save the print procedure of blocking materials to enhance productivity.
(2) in precise Printing: mainly through closed loop control method, mechanism is walked to print line and compensate (as Chinese invention patent 201410122566.1), realize the accurate control of walking movement to improve the validity of eject position, and then promote 3D printing precision.
(3) in composite material printing: be connected (as Chinese invention patent 201310339204.3) respectively with respective shower nozzle to realize many shower nozzles individual injection mainly through many feed units, or the mixing chamber's (as Chinese invention patent 201410010519.8) shower nozzle being separated into separate chamber and communicating with each chamber, multiple color material realizes colour print by mutually mixing.
Existing patent contributes to the efficient precise Printing of composite material, but still there are following some shortcomings, and main manifestations is:
1) printing effect is still not enough, constrains the further large-scale promotion that 3D prints.Current 3D prints that main what adopt is the form of single nozzle printing, and printing speed is slow, and printed material is single; And many nozzle printings grow up just gradually, increase print span to a certain extent, one way multilayer can be realized and print, which increase printing effect, but many nozzle printings need multiple motor and control unit etc. usually, cause that printer volume is bigger than normal, cost is higher.
2) many synchronous material ratio is sprayed and is realized difficulty, and end properties is poor.3D rapid shaping technique is that composite material forming provides a kind of new method, and for pursuing high-quality composite products, accurate proportioning is of crucial importance.But the separate multiple shower nozzles of current usual employing carry out jet printing, the lower synchronism that works long hours fast is difficult to ensure, this will cause exporting material proportion inequality, finally affect quality of item.
3) precision of printed product needs to be further improved.The quality of 3D printed product depends on that even, stable drop sprays, and in print procedure, often there is main droplet and secondary drop.Because the position of secondary drop is wayward, can bring adverse effect to product printing precision, the drop dripping problems between twice injection simultaneously equally also can cause printing precision low, causes product surface coarse.
Summary of the invention
One of the technical problem to be solved in the present invention, is to provide a kind of rotary digital valve, is exported, can realize high frequency sound, accurate feeding by the quick on-off of rotary spool and the ratio of double spool.
One of the technical problem to be solved in the present invention is achieved in that a kind of rotary digital valve, comprises valve pocket, left spool and right spool; Described left spool and right spool can move left and right and synchronous rotary be arranged on valve pocket inside; Described valve pocket has left intake port, right intake port; The circumferential surface of described left spool is provided with the left holding groove array of periodic distribution, and left holding groove array is communicated with left feeder channel; The circumferential surface of described right spool is provided with the right holding groove array of periodic distribution, and right holding groove array is communicated with right feeder channel; In the process of described left spool movement vertically, there is following two states: namely described left holding groove array axially docks with left intake port and the state that is communicated with, or described left holding groove array and left intake port axially stagger disconnected state, and described left holding groove array and left intake port determine the size of left side feed at the docking location of axis; In the process of described right spool movement vertically, also there is following two states: namely described right holding groove array axially docks with right intake port and the state that is communicated with, or described right holding groove array and right intake port axially stagger disconnected state, and the size of described right holding groove array and right intake port feed on the right of the docking location of axis determines; When described left holding groove array and left intake port axially dock, there is in the process of described left Spool rotating described left holding groove array and the circumferential docking of left intake port and connected sum and stagger and be not communicated with two states and alternately occur; When described right holding groove array and right intake port axially dock, there is in the process of described right Spool rotating described right holding groove array and the circumferential docking of right intake port and connected sum and stagger and be not communicated with two states and alternately occur; The ratio output quantity of described left side feed and the right feed depends on the mechanical dutycycle that left spool and right poppet shaft are formed to moving displacement; The switching frequency of described rotary digital valve equals the product of the groove number in the rotating speed of left spool and right spool synchronous rotary and left holding groove array or right holding groove array.
Further, described valve pocket also has left resorption hole and right resorption hole, the circumferential surface of described left spool is also provided with the left resorption groove array of periodic distribution, and left resorption groove array is communicated with described left feeder channel; The circumferential surface of described right spool is provided with the right resorption access slot array of periodic distribution, and right resorption groove array is communicated with described right feeder channel; When described left holding groove array is communicated with left intake port, described left resorption groove array is not communicated with left resorption hole, and when described right holding groove array is communicated with right intake port, right resorption groove array is not communicated with right resorption hole; Otherwise when described left holding groove array is not communicated with left intake port, described left resorption groove array is communicated with left resorption hole, when described right holding groove array is not communicated with right intake port, described right resorption groove array is communicated with right resorption hole; The left end of described left spool, the right-hand member of right spool and form a control chamber respectively between left spool and right spool, arbitrary described control chamber all connects an electromagnetic proportional valve with what control left spool and right spool and moves axially state.
Further, arrange successively from left to right vertically in described left intake port, left resorption hole, right intake port, right resorption hole on described valve pocket, and correspondence, described left holding groove array, left resorption groove array, right holding groove array and right resorption groove array are arranged from left to right successively; Described left feeder channel is between left holding groove array and left resorption groove array, and right feeder channel is between right holding groove array and right resorption groove array.
Further, described left intake port, right intake port, left resorption hole and right resorption hole are rhombic hole, and acute angle axially left and right distribution in two of rhombic hole; Groove in described left holding groove array, left resorption groove array, right holding groove array and right resorption groove array is isosceles triangle groove, and the drift angle of each groove is towards left layout in left holding groove array and right holding groove array, in left resorption groove array and right resorption groove array, the drift angle of each groove is towards right layout; The drift angle of described isosceles triangle is equal with the interior acute angle of rhombic hole; Described right spool when maximum displacement place moved right, axial distance value h1 between the outer dead centre of right intake port and the outer dead centre of left holding groove array, equal with the long-diagonal distance value h2 of right intake port.
Further, the size and shape in described left intake port, right intake port, left resorption hole and right resorption hole is consistent, and the size and shape of described left holding groove array, left resorption groove array, right holding groove array and right resorption groove array is consistent.
Further, the number of described left holding groove array, left resorption groove array, right holding groove array and right resorption groove array middle slot is 3 ~ 10.
Further, described left spool left end convex shoulder offers circular groove, left spool has axial hole, this circular groove and this axial hole form hydraulic fluid channel, and the control chamber between described left spool and right spool is communicated with described electromagnetic proportional valve by this hydraulic fluid channel simultaneously.
Further, displacement transducer and limit switch is also comprised; Institute's displacement sensors is connected to the left end of left spool by a reference test bar, move axially distance with what measure left spool, described limit switch is arranged on dextrad maximum displacement place of right spool.
Further, the left end of described right spool is plugged in the right-hand member of left spool, and described right spool and left spool are connected by key and realize synchronous rotary by driven by motor.
The technical problem to be solved in the present invention two, be the ejecting system that a kind of 3D printing device is provided, the rotary digital valve of the application of the invention, the ratio realizing quick on-off and double spool exports, and to realize the high frequency sound of 3D printing device, the accurate drop of composite material sprays.
Two of the technical problem to be solved in the present invention is achieved in that a kind of ejecting system of 3D printing device, comprise two feed branches and two printing heads, also comprise as above rotary digital valve of the present invention, described two feed branches connect the left intake port of described rotary digital valve and right intake port respectively, and the left feeder channel of described rotary digital valve is connected printing head described in respectively with right feeder channel.
Further, the ejecting system of 3D printing device of the present invention also comprises two negative pressure devices, left resorption hole and the right resorption hole of described rotary digital valve connect a negative pressure device respectively, and the liquid level height of negative pressure device is lower than the minimum level height in coupled logical printing head.
The beneficial effect that the present invention has is:
1) digital valve of the present invention double spool linkage rotation and driven by single motor, printing effect obviously promotes.Valve pocket has left and right intake port, two spool convex shoulder positions, left and right have the left and right holding groove array of periodic distribution, with left and right two valve core rotation, this left and right intake port and left and right holding groove array period quick on-off, to realize the left and right existing periodic quick on-off of feeder channel, realize high frequency response thus, if be connected with two shower nozzles of 3D printing device, the high frequency that can realize composite material exports, thus effectively promotes printing effect.
2) left and right two spools move axially independent control, can realize bi-material precise synchronization ratio spray, end properties is good.About this valve, two spools control two shower nozzles outputs respectively, bound site displacement sensor is monitored, realize being synchronized with the movement or the accurate closed loop control of single valve core movement of two spools, thus ensure that many material proportions export, synchronism is good, is particularly useful for the 3D printing shaping of composite material (especially coloured prod).
3) valve pocket also has left resorption hole and right resorption hole, the circumferential surface of left and right two spools is also provided with the left and right resorption groove array of periodic distribution, form interlock wicking structure, effectively inhibit the formation of secondary drop and other unnecessary injections, printing precision is high.In liquid drop jetting process, set negative pressure device can strengthen the fracture energy of drop, prevent the generation of secondary drop, simultaneously between twice injection, suction function makes the liquid resorption a little in shower nozzle, avoid liquid to drip because of gravity, ensure that uniform and stable drop sprays thus, improve quality of product.
Accompanying drawing explanation
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the internal structure schematic diagram of rotary digital valve one of the present invention preferred embodiment.
Fig. 2 is the location diagram that lower of the left spool working state of rotary digital valve of the present invention opens rhombic hole on triangular groove and valve pocket.
Fig. 3 is the location diagram that lower of the right valve core reset state of rotary digital valve of the present invention opens rhombic hole on triangular groove and valve pocket.
Fig. 4 is that rotary digital valve of the present invention controls two spool axial motion simplified schematic diagram.
Fig. 5 a to Fig. 5 c is two spool axial motion simplified schematic diagram of rotary digital valve of the present invention.
Fig. 6 a to Fig. 6 c characterizes two valve core reset motion simplified schematic diagram of rotary digital valve of the present invention.
Fig. 7 prints ejecting system schematic diagram based on 3D of the present invention.
Fig. 8 characterizes the present invention's working principle schematic diagram in the state of a spray.
Fig. 9 characterizes the working principle schematic diagram of the present invention under resorption state.
Embodiment
As shown in Figures 1 to 6, rotary digital valve 100 1 of the present invention preferred embodiment, comprises valve pocket 1, left spool 2 and right spool 3, also comprises valve body 4, valve gap 5, displacement transducer 6 and limit switch 7; Described left spool 2 and right spool 3 can move left and right and synchronous rotary to be arranged on valve pocket 1 inner; Wherein, the left end of described right spool 3 is plugged in the right-hand member of left spool 2, and described right spool 3 and left spool 2 are connected by key and realize synchronous rotary by motor shaft 82 by motor 8 drive.Described valve gap 5 is located at the right-hand member of valve body 4, and described valve pocket 1 is located in valve body 4, and described valve pocket 1 has left intake port 11, left resorption hole 12, right intake port 13 and right resorption hole 14 vertically from left to right successively; The circumferential surface of described left spool 2 is provided with the left holding groove array 21 of periodic distribution, left resorption groove array 22, and left holding groove array 21 is communicated with left feeder channel 23 with resorption groove array 22; The circumferential surface of described right spool 3 is provided with the right holding groove array 31 of periodic distribution and right resorption groove array 32, and right holding groove array 31 and right resorption groove array 32 are communicated with right feeder channel 33; Described left feeder channel 23 is between left holding groove array 21 and left resorption groove array 22, and right feeder channel 33 is between right holding groove array 31 and right resorption groove array 32; During design, left holding groove array 21 and left resorption groove array 22 can be located at two convex shoulder parts of left spool 2, the thin portion self-assembling formation between left feeder channel 23 can be divided by two convex shoulders, right feeder channel 33 in like manner can obtain.Described valve body 4 has vertically from left to right successively left material feeding mouth 41, left resorption mouth 42, right material feeding mouth 43, right resorption mouth 44 to dock with described left intake port 11, left resorption hole 12, right intake port 13, right resorption hole 14 respectively.Institute's displacement sensors 6 is connected to the left end of left spool 2 by a reference test bar 62, and move axially distance with what measure left spool 2, described limit switch 7 is arranged on dextrad maximum displacement place of right spool 3, and maximum displacement place is generally the interior edge face of valve pocket end cap 15.
In the process of described left spool 2 movement vertically, there is following two states: namely described left holding groove array 21 axially docks with left intake port 11 and the state that is communicated with, or described left holding groove array 21 stagger disconnected state axial with left intake port 11, and described left holding groove array 21 and left intake port 11 determine the size of left side feed at the docking location of axis; In the process of described right spool 3 movement vertically, also there is following two states: namely described right holding groove array 31 axially docks with right intake port 13 and the state that is communicated with, or described right holding groove array 31 stagger disconnected state axial with right intake port 13, and described right holding groove array 31 and right intake port 13 determine the size of the right feed at the docking location of axis.
When described left holding groove array 21 and left intake port 11 axially dock, there is in the process that described left spool 2 rotates described left holding groove array 21 and the circumferential docking of left intake port 11 and connected sum and stagger and be not communicated with two states and alternately occur; When described right holding groove array 31 and right intake port 13 axially dock, there is in the process that described right spool 3 rotates described right holding groove array 31 and the circumferential docking of right intake port 13 and connected sum and stagger and be not communicated with two states and alternately occur; The ratio output quantity of described left side feed and the right feed depends on the mechanical dutycycle that left spool 2 and right spool 3 axial motion displacement are formed; The switching frequency of described rotary digital valve 100 equals the product of the groove number in the rotating speed of left spool 2 and right spool 3 synchronous rotary and left holding groove array 21 or right holding groove array 31.
When described left holding groove array 21 is communicated with left intake port 11, described left resorption groove array 22 is not communicated with left resorption hole 12, and when described right holding groove array 31 is communicated with right intake port 13, right resorption groove array 32 is not communicated with right resorption hole 14; Otherwise when described left holding groove array 21 is not communicated with left intake port 11, described left resorption groove array 22 is communicated with left resorption hole 12, when described right holding groove array 31 is not communicated with right intake port 13, described right resorption groove array 32 is communicated with right resorption hole 14.To meet rotary digital valve 100 (i.e. feed state) not resorption in working order, enable normal work, and in off working state (during as the resetted) demand of resorption, make two outlet 101 (102) No drip types.
Compared with in the embodiment in happy festival time, rhombic hole all consistent with shape sized by described left intake port 11, right intake port 13, left resorption hole 12 and right resorption hole 14, and acute angle axially left and right distribution in two of rhombic hole; Isosceles triangle groove all consistent with shape sized by groove in described left holding groove array 21, left resorption groove array 22, right holding groove array 31 and right resorption groove array 32, and the drift angle of each groove is towards left layout in left holding groove array 21 and right holding groove array 31, in left resorption groove array 22 and right resorption groove array 32, the drift angle of each groove is towards right layout; The drift angle of described isosceles triangle is equal with the interior acute angle of rhombic hole; Described right spool 3 when maximum displacement place moved right, axial distance value h1 between the outer dead centre of right intake port 13 and the outer dead centre of right holding groove array 31, equal with the long-diagonal distance value h2 of right intake port 13.
The number of described left holding groove array 21, left resorption groove array 22, right holding groove array 31 and right resorption groove array 32 middle slot is 3 ~ 10.
Wherein left intake port 11, left resorption hole 12 situation about being communicated with left holding groove array 21, left resorption groove array 22 is respectively concrete as shown in Figure 2, the convex shoulder part corresponding to the left holding groove array 21 on left spool 2 and left resorption groove array 22 is along the circumferential direction launched; Simultaneously by left intake port 11 and with left resorption hole 12, project to respectively in the unfolded drawing of left holding groove array 21 and left resorption groove array 22.In left holding groove array 21 and left resorption groove array 22, the size and shape of each triangular groove is completely the same, but the position of opening is different; Can realize when left intake port 11 is communicated with left holding groove array 21 thus, left resorption hole 12 is in off state with left resorption groove array 22, composition graphs 1, the liquid which avoid the input of left material feeding mouth 41 directly detaches from left resorption mouth 42 through negative pressure device, and vice versa.The switching frequency of rotary digital valve 100 of the present invention, equals the product of the triangular groove number of motor 8 rotating speed and left holding groove array 21, therefore by increasing motor speed and triangular groove number, makes rotary digital valve 100 obtain higher switching frequency.
As Fig. 3 characterize be right spool 3 be in reset mode time, the right intake port 13 that valve pocket 1 is opened and right resorption hole 14, with the position relationship of the right holding groove array 31 that right spool 3 is offered and right resorption groove array 32.For accurately controlling dutycycle and realizing the resorption requirement under reset mode, the triangular groove apex angle α 1 of right holding groove array 31 is equal with the interior sharp angle α 2 of right intake port 13 projection drawing parallelogram, the triangular groove top of left holding groove array 21 is to the axial distance value h1 of the outer dead centre of left intake port 11, equal with the long-diagonal h2 of left intake port 11.Meanwhile, because now right spool 22 is in reset mode, i.e. limit on the right-right-hand limit position, right intake port 13 is not communicated with right holding groove array 31, and liquid does not input, and does not namely spray, and mechanical dutycycle is 0%.Meanwhile, right resorption hole 14 is positioned at the high order end of right resorption groove array 32, is in connected state, so namely by negative pressure device resorption material, dropping liquid phenomenon can not occurs in left spool 2 rotation status bottom right resorption hole 14 with right resorption groove array 32.
What Fig. 4 characterized is the schematic diagram controlling spool axial motion of the present invention.The left spool 2 of rotary digital valve 100 is connected by key A with right spool 3.Composition graphs 1, motor 8 drives right spool 3 to rotate, and right spool 3 drives left spool 2 to rotate by key A, thus ensures the synchronous rotary of left spool 2 and right spool 3.So the ratio output quantity of 100 liang, rotary digital valve outlet 101 and 102 depends on the mechanical dutycycle that left spool 2 and right spool 3 axial motion displacement are formed.
Export for realizing accurate ratio, the described left end of left spool 2, the right-hand member of right spool 3 and form a control chamber respectively between left spool 2 and right spool 3, arbitrary described control chamber all connects an electromagnetic proportional valve, to control moving axially of left spool 2 and right spool 3.Control chamber is respectively the first control chamber B1, the second control chamber B2 and the 3rd control chamber B3, electromagnetic proportional valve comprises the first electromagnetic proportional valve 91, second electromagnetic proportional valve 92 and the 3rd electromagnetic proportional valve 93, controls the first control chamber B1, the second control chamber B2 and the 3rd control chamber B3 respectively.When the first left position of electromagnetic proportional valve 91 works, the second electromagnetic proportional valve 92 meta work, the 3rd electromagnetic proportional valve 93 right position work; Liquid enters the first control chamber B1 and promotes right spool 3 toward left movement, now because the second control chamber B2 is in closed state, and liquid compression is little, so by the left spool 2 of the liquid-driving in the second control chamber B2 toward left movement, thus realize the synchronous past left movement of right spool 3 and left spool 2.When the second left position of electromagnetic proportional valve 92 works, the 3rd electromagnetic proportional valve 93 right position work, the first electromagnetic proportional valve 92 meta work; Liquid enters the second control chamber B2, and the 3rd control chamber B3 goes out liquid, and because the first control chamber B1 is in closed state, now left spool 2 is separately toward left movement, and right spool 3 keeps static.When the 3rd left position of electromagnetic proportional valve 93 works, the second electromagnetic proportional valve 62 right position work, the first electromagnetic proportional valve 32 meta work; Liquid enters the 3rd control chamber B3, and the second control chamber B2 returns liquid, and because the first control chamber B1 is in closed state, now left spool 2 is turned right separately motion, and right spool 3 keeps static.
The motion state that left spool 2 and right spool 3 move axially comprises following three kinds of situations:
(1) as Fig. 5 a, described left spool 2 and right spool 3 are an entirety, synchronously toward moving left x1, realize the output of equal proportion.During reset, keep left spool 2 and right spool 3 to be an entirety, turn right motion x1 together; As Fig. 6 a, left spool 2 left end is connected with displacement transducer 6 by reference test bar 62, and therefore its position is detected by displacement transducer 6;
(2) as Fig. 5 b, first left spool 2 is synchronous with right spool 3, and toward left movement x1, then right spool 3 keeps static, and left spool 2 is separately toward moving left x2, and the different proportion realizing left feeder channel 23 and right feeder channel 33 sprays; During reset, left spool 2 is turned right the distance of motion x1+x2, and as Fig. 6 b, its position is detected by displacement transducer 6, and right spool 3 is toward moving right x1, and its position is detected by limit switch 7;
(3) as Fig. 5 c, first left spool 2 is synchronous with right spool 3, and toward left movement x1, then right spool 3 keeps static, and left spool 2 is separately toward moving right x2, and the different proportion realizing left feeder channel 23 and right feeder channel 33 exports; During reset, left spool 2 is turned right the distance of motion x1-x2, and as Fig. 6 c, its position is detected by displacement transducer 6, and right spool 3 is toward moving right x1, and its position is detected by limit switch 7.
Described left spool 2 left end convex shoulder offers circular groove 24, left spool 2 has axial hole 25, the control chamber between described left spool 2 and right spool 3 i.e. the second control chamber B2 is communicated with electromagnetic proportional valve described in i.e. the second electromagnetic proportional valve 92 by this through hole 25 with circular groove 24 simultaneously.
Fig. 7 schematically illustrates the application of rotary digital valve 7 in 3D printing ejecting system of embodiment of the present invention.Primary Reference Fig. 7 to Fig. 9, composition graphs 1 to Fig. 6 simultaneously, along with the fast development of composite material, rapid shaping technique is the acceleration exploitation of new product, the raising of manufacturing technology serves very large impetus, rotary digital valve 100 of the present invention has two delivery outlets 101 and 102, compound molding for bi-material provides a kind of new scheme, and the ratio realizing quick on-off and double spool exports, and to realize the high frequency sound of 3D printing device, the accurate drop of composite material sprays.
The ejecting system of this 3D printing device, comprise two feed branch 200 and two printing heads 300, also comprise two negative pressure devices 400, also comprise as above rotary digital valve 100 of the present invention, described feed branch 200 comprises material cartridge 201, heating equipment 202, pump 203, relief valve 204, filter 205 and one-way valve 206.Described two feed branches 200 connect left intake port 21 and the right intake port 31 of described rotary digital valve respectively, left resorption hole 22 and the right resorption hole 32 of rotary digital valve 100 connect a negative pressure device 400 respectively, and the left feeder channel 23 of described rotary digital valve 100 is connected printing head 300 described in respectively with right feeder channel 33.And the liquid level height of negative pressure device 400 is lower than the minimum level height in coupled logical printing head.
In this ejecting system working procedure, first utilize heating equipment 202 to heat bi-material respectively, make it meet injection conditions.When rotary digital valve 100 is in the work of left position, wherein a kind of material enters rotation fitting type digital valve 100 after pump one feed branch 200, then ejects from a printing head 300; Another kind of material enters rotary digital valve 100 through another feed branch, then ejects from another printing head 300.When the work of rotary digital valve 100 right position, two printing heads 300 communicate with two negative pressure devices 400 respectively, and under suction function, the fluent material in two printing heads 300 forms resorption state a little, avoid the weeping of liquid under Action of Gravity Field.Due to the droplet-like that the liquid ejected from printing head 300 is discrete, so for ease of analyzing, the ratio that definition " dutycycle " is liquid output state and the non-output state of liquid, this parameter and Spool rotating speed, determine speed and the frequency of injection.
Fig. 8 ~ 9 characterize ejecting system spray regime and the resorption operation schematic diagram of 3D printing device of the present invention.Composition graphs 1, when being in spray regime, liquid is entered by the left material feeding mouth 41 on valve body 4, and communicates with printing head 300 through the discharge port 101 corresponding with left spool 2, and now left material sucking port 42 is closed, and realizes a kind of injection of liquid thus.Meanwhile, another kind of liquid enters from the right material feeding mouth 43 valve body 4, and communicates with printing head 300 through the discharge port 102 mouthfuls corresponding with right spool 3, and now right material sucking port 43 is closed, realize the injection of another kind of liquid, namely complete discharge port 101 and discharge port 102 mouthfuls sprays simultaneously.After completing once injection, enter resorption state, now, left material feeding mouth 41 on valve body 4 and right material feeding mouth 43 are closed, printing head 300 is connected with negative pressure device 400 after right material sucking port 43 through left material sucking port 42, the small size resorption of the liquid in printing head 300, makes the small size resorption of the liquid in printing head 300, liquid drip leakage is avoided with this, ready for spraying next time.
As in the resorption state embodiment of Fig. 9, the liquid level height of negative pressure device 400 is lower than the minimum level height in coupled logical printing head 300, and the two difference of liquid level is that h is adjustable, obtains the resorption negative pressure value meeting different injection demand thus.
Although the foregoing describe the specific embodiment of the present invention; but be familiar with those skilled in the art to be to be understood that; specific embodiment described by us is illustrative; instead of for the restriction to scope of the present invention; those of ordinary skill in the art, in the modification of the equivalence done according to spirit of the present invention and change, should be encompassed in scope that claim of the present invention protects.
Claims (10)
1. a rotary digital valve, is characterized in that: comprise valve pocket, left spool and right spool; Described left spool and right spool can left and right move axially and synchronous rotary be arranged on valve pocket inside;
Described valve pocket has left intake port, right intake port; The circumferential surface of described left spool is provided with the left holding groove array of periodic distribution, and left holding groove array is communicated with left feeder channel; The circumferential surface of described right spool is provided with the right holding groove array of periodic distribution, and right holding groove array is communicated with right feeder channel;
In the process of described left spool movement vertically, there is following two states: namely described left holding groove array axially docks with left intake port and the state that is communicated with, or described left holding groove array and left intake port axially stagger disconnected state, and described left holding groove array and left intake port determine the size of left side feed at the docking location of axis; In the process of described right spool movement vertically, also there is following two states: namely described right holding groove array axially docks with right intake port and the state that is communicated with, or described right holding groove array and right intake port axially stagger disconnected state, and the size of described right holding groove array and right intake port feed on the right of the docking location of axis determines;
When described left holding groove array and left intake port axially dock, there is in the process of described left Spool rotating described left holding groove array and the circumferential docking of left intake port and connected sum and stagger and be not communicated with two states and alternately occur; When described right holding groove array and right intake port axially dock, there is in the process of described right Spool rotating described right holding groove array and the circumferential docking of right intake port and connected sum and stagger and be not communicated with two states and alternately occur;
The ratio output quantity of described left side feed and the right feed depends on the mechanical dutycycle that left spool and right poppet shaft are formed to moving displacement; The switching frequency of described rotary digital valve equals the product of the groove number in the rotating speed of left spool and right spool synchronous rotary and left holding groove array or right holding groove array;
The left end of described left spool, the right-hand member of right spool and form a control chamber respectively between left spool and right spool, arbitrary described control chamber all connects an electromagnetic proportional valve with what control left spool and right spool and moves axially state.
2. a kind of rotary digital valve according to claim 1, it is characterized in that: described valve pocket also has left resorption hole and right resorption hole, the circumferential surface of described left spool is also provided with the left resorption groove array of periodic distribution, and left resorption groove array is communicated with described left feeder channel; The circumferential surface of described right spool is provided with the right resorption access slot array of periodic distribution, and right resorption groove array is communicated with described right feeder channel;
When described left holding groove array is communicated with left intake port, described left resorption groove array is not communicated with left resorption hole, and when described right holding groove array is communicated with right intake port, right resorption groove array is not communicated with right resorption hole; Otherwise when described left holding groove array is not communicated with left intake port, described left resorption groove array is communicated with left resorption hole, when described right holding groove array is not communicated with right intake port, described right resorption groove array is communicated with right resorption hole.
3. a kind of rotary digital valve according to claim 2, it is characterized in that: arrange successively from left to right vertically in described left intake port, left resorption hole, right intake port, right resorption hole on described valve pocket, and correspondence, described left holding groove array, left resorption groove array, right holding groove array and right resorption groove array are arranged from left to right successively;
Described left feeder channel is between left holding groove array and left resorption groove array, and right feeder channel is between right holding groove array and right resorption groove array;
Described left intake port, right intake port, left resorption hole and right resorption hole are rhombic hole, and acute angle axially left and right distribution in two of rhombic hole; Groove in described left holding groove array, left resorption groove array, right holding groove array and right resorption groove array is isosceles triangle groove, and the drift angle of each groove is towards left layout in left holding groove array and right holding groove array, in left resorption groove array and right resorption groove array, the drift angle of each groove is towards right layout;
The drift angle of described isosceles triangle is equal with the interior acute angle of rhombic hole;
Described right spool when maximum displacement place moved right, axial distance value h1 between the outer dead centre of right intake port and the outer dead centre of left holding groove array, equal with the long-diagonal distance value h2 of right intake port.
4. a kind of rotary digital valve according to claim 3, it is characterized in that: the size and shape in described left intake port, right intake port, left resorption hole and right resorption hole is consistent, and the size and shape of described left holding groove array, left resorption groove array, right holding groove array and right resorption groove array is consistent.
5. a kind of rotary digital valve according to claim 3 or 4, is characterized in that: the number of described left holding groove array, left resorption groove array, right holding groove array and right resorption groove array middle slot is 3 ~ 10.
6. a kind of rotary digital valve according to claim 1, it is characterized in that: described left spool left end convex shoulder offers circular groove, left spool has axial hole simultaneously, this circular groove and this axial hole form hydraulic fluid channel, and the control chamber between described left spool and right spool is communicated with described electromagnetic proportional valve by this hydraulic fluid channel.
7. a kind of rotary digital valve according to claim 1, is characterized in that: also comprise displacement transducer and limit switch; Institute's displacement sensors is connected to the left end of left spool by a reference test bar, move axially distance with what measure left spool, described limit switch is arranged on dextrad maximum displacement place of right spool.
8. a kind of rotary digital valve according to claim 1, it is characterized in that: the left end of described right spool is plugged in the right-hand member of left spool, and described right spool and left spool is connected by key and realizes synchronous rotary by driven by motor.
9. the ejecting system of a 3D printing device, comprise two feed branches and two printing heads, it is characterized in that: also comprise the rotary digital valve as described in any one of claim 1 to 8, described two feed branches connect the left intake port of described rotary digital valve and right intake port respectively, and the left feeder channel of described rotary digital valve is connected printing head described in respectively with right feeder channel.
10. the ejecting system of a kind of 3D printing device according to claim 9, it is characterized in that: also comprise two negative pressure devices, left resorption hole and the right resorption hole of described rotary digital valve connect a negative pressure device respectively, and the liquid level height of negative pressure device is lower than the minimum level height in coupled logical printing head.
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| CN201410628455.8A CN104389832B (en) | 2014-11-10 | 2014-11-10 | A kind of rotary digital valve and the spraying system of 3D printing device |
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| CN201410628455.8A CN104389832B (en) | 2014-11-10 | 2014-11-10 | A kind of rotary digital valve and the spraying system of 3D printing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI617428B (en) * | 2016-11-24 | 2018-03-11 | 財團法人國家實驗研究院 | Droplet generating device and method |
| CN109822902A (en) * | 2019-04-07 | 2019-05-31 | 吉林大学 | Unsupported liquid phase mixed material 3D printing device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0396776A (en) * | 1989-09-08 | 1991-04-22 | Kubota Corp | Driving mechanism of valve |
| GB2225838B (en) * | 1988-10-20 | 1992-07-29 | Deutsche Forsch Luft Raumfahrt | A ball valve |
| US6098644A (en) * | 1997-01-20 | 2000-08-08 | Jatco Corporation | Method and apparatus for controlling duty-cycle type solenoid valve |
| US6231028B1 (en) * | 1997-11-05 | 2001-05-15 | Kabushiki Kaisha Saginomiya Seisakusho | Rotary channel-selector valve |
| CN102797721A (en) * | 2012-08-19 | 2012-11-28 | 杭州宇控机电工程有限公司 | Direct-acting large-flow high-speed switching electromagnetic valve |
-
2014
- 2014-11-10 CN CN201410628455.8A patent/CN104389832B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2225838B (en) * | 1988-10-20 | 1992-07-29 | Deutsche Forsch Luft Raumfahrt | A ball valve |
| JPH0396776A (en) * | 1989-09-08 | 1991-04-22 | Kubota Corp | Driving mechanism of valve |
| US6098644A (en) * | 1997-01-20 | 2000-08-08 | Jatco Corporation | Method and apparatus for controlling duty-cycle type solenoid valve |
| US6231028B1 (en) * | 1997-11-05 | 2001-05-15 | Kabushiki Kaisha Saginomiya Seisakusho | Rotary channel-selector valve |
| CN102797721A (en) * | 2012-08-19 | 2012-11-28 | 杭州宇控机电工程有限公司 | Direct-acting large-flow high-speed switching electromagnetic valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI617428B (en) * | 2016-11-24 | 2018-03-11 | 財團法人國家實驗研究院 | Droplet generating device and method |
| CN109822902A (en) * | 2019-04-07 | 2019-05-31 | 吉林大学 | Unsupported liquid phase mixed material 3D printing device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104389832B (en) | 2016-09-28 |
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