CN105252775B - A kind of three-dimensional model former and its forming method - Google Patents
A kind of three-dimensional model former and its forming method Download PDFInfo
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- CN105252775B CN105252775B CN201510799531.6A CN201510799531A CN105252775B CN 105252775 B CN105252775 B CN 105252775B CN 201510799531 A CN201510799531 A CN 201510799531A CN 105252775 B CN105252775 B CN 105252775B
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Abstract
The present invention relates to model forming technical fields, and in particular to a kind of three-dimensional model former and its forming method.The present invention provides a kind of three-dimensional model former, rack including being equipped with workbench, workbench is equipped with the photocuring liquid container of opening upwards, the shaped platform being connected with elevating lever is equipped in tubular construction, elevating lever is connected with driving device, shaped platform is equipped with the paving liquid device that back and forth movement is carried out on guide rail, paving liquid device is connected with horizontal drive apparatus, it spreads liquid device and is equipped with atomising device, atomising device is equipped with and photocuring liquid entrance, atomising device includes the atomizer being connected with the photocuring liquid entrance, atomizer is arranged in paving liquid housing, it is located to be equipped with above the shaped platform in rack and cures light projecting apparatus, rack, which is located above shaped platform, is equipped with liquid level position detection device.The present invention is small to the disturbance of photocuring liquid container, reduces dependence of the forming process to support construction, is suitble to the Stereolithography of flexible body.
Description
Technical field
The present invention relates to mold curing field shaping techniques, and in particular to a kind of three-dimensional model former and its shaping side
Method.
Background technology
There are many kinds of the forming methods of three-dimensional model, wherein method (SLA) energy for passing through ultraviolet curing light-cured resin
It is enough that higher forming accuracy is provided and preferably shapes surface smoothness.Chinese patent CN 203665945U disclose one kind
Based on DLP projection photocurable three-dimensional printers, including computer system, automatic control system, DLP projection system, shaping work
Pond, feeding system and jacking system can realize high-precision continuous Stereolithography.Chinese patent CN
201410795471.6 disclose and a kind of have the function of that the laser 3D printing machine struck off and its photocuring Method of printing disclose one
Kind there is the laser 3D printing machine struck off, including being used to forming the outline border unit of abridged edition skeleton, for holding printing stoste
Hopper, can with the outline border unit relative longitudinal motion and in the hopper print unit of working position, be used for
The illumination unit of photocuring laser light source is provided, is used between the print unit and the illumination unit to printing surface
Strike off the control unit for striking off unit and controlling each unit working condition of processing；It is described strike off unit can longitudinal movement,
The strike-off stick set thereon horizontal cross can move in hopper, and complete scraper action simultaneously in being moved back and forth at one and smear
Translation is made.Chinese patent CN 201410027198 discloses a kind of 3D projected based on DLP principles and below liquid resin
Printer is equipped with resin storage tank, the bottom plate light-permeable of the resin storage tank；Shaping platform is fixedly connected on vertical lifting mechanism, is led to
Vertical lifting mechanism is crossed to adjust the distance between resin storage tank and shaped platform；Computer is for handling threedimensional model and by three-dimensional
Model sequence is divided into certain thickness several profile graphics, and computer is also connected with control electrical control gear, electric-controlled
Device processed controls vertical lifting mechanism automatic lifting shaped platform, and controls DLP projector to light-cured resin liquid in resin storage tank
Face is irradiated；DLP projector is arranged on the lower section of resin storage tank and is connected with computer, and DLP projector is by the figure light path of profile graphics
Bottom plate through resin storage tank is transmitted with irradiation light curable liquid resin.
Cured solid portion or uncured liquid part can all be subject to during the realization shaping of the prior art
Different degrees of disturbance.Chinese patent CN 203665945U are disclosed will be from feeding system to shaping in every one layer of curing completion
Work pool supplements light-cured resin, and uncured liquid part will generate flowing；It is scraped in Chinese patent CN 201410795471.6
Flat unit reaches longitudinal movement and the cured solid portion on surface and uncured liquid part is caused to disturb；Chinese patent CN
201410027198 cured parts and resin storage tank depart from and liquid resin flowing adds to cured portion and tray bottom surface
Between all generate disturbance.This disturbance to need additional increase support construction during the overhanging portion of three-dimensional model, otherwise disturb
Under the action of dynamic, dislocation and modification can occur in forming process for overhanging portion.It is needed after the completion of forming process by support construction
Removal, so increases treatment process；Two carry out support construction needs contacts with three-dimensional model surface, to complete to support, removal
The flatness on three-dimensional model surface is influenced afterwards.In addition, when the forming process of three-dimensional model generates flexible body, this disturbance can influence
Formed precision.
The content of the invention
In order to overcome the defects of the prior art, the photocuring three-dimensional model former that the present invention passes through a kind of low disturbance
And forming method, reduce to the demand of support construction in three-dimensional model forming process, and be further adapted for the solid of flexible body
Model forming.
The present invention is achieved through the following technical solutions：A kind of three-dimensional model former, including being equipped with workbench
Rack, the workbench are equipped with the photocuring liquid container of tubular construction and opening upwards, are equipped with and liter in the tubular construction
The shaped platform that drop bar connection moves up and down, is equipped with sealing ring between the tubular construction inner wall and the shaped platform,
The elevating lever is connected with the driving device being arranged in rack, and the top of the shaped platform is equipped with to carry out back and forth on guide rail
The paving liquid device of movement, the paving liquid device are connected with the horizontal drive apparatus being arranged in rack, and the paving liquid device is equipped with
Liquid housing and atomising device are spread, the atomising device is equipped with the photocuring liquid entrance being connected with photocuring liquid supplying device, described
Atomising device includes the atomizer being connected with the photocuring liquid entrance, and the atomizer is arranged on the paving liquid housing
It is interior, it is located in the rack above the shaped platform and is equipped with curing light projecting apparatus, the rack is located at the shaped platform
Top is equipped with liquid level positional detecting device.
Further, the paving liquid housing bottom is equipped with balanced baffle, and the equilibrium baffle is equipped with the equalizing tank of opening,
The working motion direction of the equalizing tank is width, and the plane of movement of the equalizing tank is interior vertical with the width
Direction is length direction, and equalizing tank each point on the length direction in the range of active length is corresponding along the width
The relative mean square error of the constant volume score value of atomized drop density in the balanced channel opening in direction is no more than 10%.
Further, the balanced baffle is described equal to be in the low arc mechanism of intermediate high surrounding compared with shaped platform
The local lowest part of the junction for baffle and the paving liquid housing sidewall of weighing is equipped at least one outage.
Further, the workbench is equipped with photocuring liquid accumulator tank, and the photocuring liquid accumulator tank lower part is equipped with light
Solidify liquid retracting device.
Further, the atomising device includes the one of fluid injector, air ultrasound nozzle or low-frequency ultrasonic waves nozzle
Kind is several.
Further, the curing light projecting apparatus is face projection arrangement or light-beam scanner.
Further, there is heating unit on the atomising device.
Further, it is equipped with cooling device outside the photocuring liquid container.
The present invention also provides a kind of forming method of the three-dimensional model former using the present invention, including following step
Suddenly：
Three-dimensional model is done slicing delamination by step 1) by computer according to thickness is preset, if obtaining three-dimensional model
The dry stacking shaping figure with two-dimensional shapes；
The shaped platform of photocuring liquid container bottom is moved to delivery altitude position by step 2), uses the paving liquid device
The atomising device photocuring liquid mist is melted into drop or fine drop, the paving liquid device is along the guide rail in the shaping
Being moved horizontally above platform makes the fine drop be laid to first layer photocuring liquid on shaped platform；
Step 3) measures the height and position of current photocuring liquid level using liquid level detection device, and it is flat to decline the shaping
Platform makes the liquid level of first layer solidify liquid be in the delivery altitude position, according to the first formable layer figure obtained in step 1),
Use and cure light projecting apparatus projection and cure light curing schedule 2) in the first layer photocuring liquid that is laid with, cured part is formed
First layer mould shapes；
Step 4) reuses the institute of the paving liquid device on the liquid level for having carried out cured last layer photocuring liquid
It states atomising device and photocuring liquid mist is melted into fine drop, the paving liquid device is done along the guide rail above the shaped platform
Horizontal movement makes the fine drop be laid to next layer of photocuring liquid；
Step 5) measures the next layer of photocuring liquid level position using liquid level detection device, decline it is described into
Type platform makes the liquid level of next layer of photocuring liquid be in delivery altitude position, according to the next formable layer figure obtained in step 1)
Shape cures the middle next layer of photocuring liquid being laid with of the light curing step 4) using light projecting apparatus projection is cured, cured
Part forms next layer model shape, and the curing light for curing light projecting apparatus projection sufficient amount, makes adjacent upper
The lap of lower two formable layer figures is cured in together；
Step 6) repeated several times step 4) and step 5), until the three-dimensional model of 3D solid is molded.
Further, the forming method further includes, and photocuring is scanned by galvanometer or mobile mirror using laser
Liquid surface, the step of curing to obtain three-dimensional model shape by photocuring liquid by the high temperature generated.
Of the present invention be equipped with is atomized with the three-dimensional model former of paving liquid device compared with prior art, superior effect
It is：Paving liquid device in the present invention is small to the disturbance of photocuring liquid container, reduces dependence of the forming process to support construction, fits
Close the Stereolithography advantage of flexible body.
Description of the drawings
Fig. 1 is the three-dimensional structure diagram of three-dimensional model former of the present invention；
Fig. 2 is the front view of the structure for amplifying of Fig. 1 middle berth liquid devices；
Fig. 3 is A-A internally structure sectional views in Fig. 2；
Fig. 4 is the three-dimensional structure diagram of Fig. 1 middle berth liquid devices；
Fig. 5 is the elevated bottom perspective structure chart of Fig. 1 middle berth liquid devices；
Fig. 6 is that the fine drop that atomising device generates in Fig. 1 is divided in the high unimodal drop density of working face center density
Cloth curve synoptic diagram；
Fig. 7 is the schematic diagram that heretofore described balanced channel opening projects to solidify liquid upper surface.
Reference numeral is as follows：
1- photocuring liquid containers, 2- workbench, 3- paving liquid housings, 4- linear bearings, 5- atomising devices, 6- photocuring liquid enter
Mouthful, 7- photosensitive sensors, 8- crossbeams, 9- curing light projecting apparatus, 10- photophores, 11- side plates, 12- guide rails, 13- worm screws, 14-
Belt, 15- photocuring liquid accumulator tanks, 16- shaped platforms, 17- transmission shafts, 18- bottom plates, 19- driving devices, 20- elevating levers,
21- racks, 23- atomizers, 24- PZT (piezoelectric transducer)s, 25- equalizing tanks, 26- equilibrium baffles, 27- outages.
Specific embodiment
The specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1
As shown in figs. 1 and 4, a kind of three-dimensional model former provided by the invention, the former are illustrated
Rack 21 including control device and U-shaped structure is equipped with crossbeam 8, the crossbeam 8 between two side plates 11 of the U-shaped structure
Lower part be equipped with workbench 2 in 21 centre position of rack, the light on the workbench 2 embedded with tubular construction and opening upwards is consolidated
Change liquid container 1, the shaped platform 16 for being connected and moving up and down with elevating lever 20, the tubular knot are equipped in the tubular construction
Sealing ring (not drawn in figure) is equipped between structure inner wall and the shaped platform 16, photocuring liquid is made not leak, while also not shadow
The up and down motion of shaped platform 16 is rung, the elevating lever 20 is connected with the driving device 19 being arranged on bottom plate 18, the shaping
The top of platform 16 is equipped with the paving liquid device that back and forth movement is carried out on guide rail 12, and the paving liquid device is with being arranged in rack
Horizontal drive apparatus connects, and the paving liquid device includes paving liquid housing 3 and atomising device 5, and the atomising device 5 is equipped with and supply
Cure the photocuring liquid entrance 6 of liquid device connection, the atomising device 5 includes the atomization being connected with the photocuring liquid entrance 6
Nozzle 23, the atomizer 23 are arranged in the paving liquid housing 3, and the top of the rack 21 is equipped with crossbeam 8, the crossbeam
8 are equipped with and 16 position of shaped platform is corresponding cures light projecting apparatus 9, set respectively on two side plates 11 of the rack 21
There are the photosensitive sensor 7 of liquid level detection device and the photophore 10 of liquid detection device, the workbench 2 is consolidated equipped with light
Change liquid accumulator tank 15, the paving liquid housing 3 of the paving liquid device is connected with worm screw 13, the worm screw 13 and the transmission on transmission shaft 17
Band 14 connects, and the transmission shaft 17 is connected with driving device 19.In the present embodiment, it is preferably provided with heating on the atomising device 5
Device (not drawn in figure) and 1 outside of the photocuring liquid container set cooling device (not drawn in figure).As shown in figure 5, the paving
Paving liquid housing 3 in liquid device is rectangular configuration, is respectively equipped with and is sleeved on guide rail 12 in the two side walls of the paving liquid housing 3
Linear bearing 4, the bottom of the paving liquid housing 3, which is equipped with, to be used cooperatively with shaped platform 16 and is in compared with shaped platform 16
The balanced baffle 26 of the low arc of the high surrounding in center, the balanced baffle 26 of the arc is equipped with opening equalizing tank 25, described equal
Weighing apparatus baffle 26 and the local lowest part of the junction of 3 side wall of paving liquid housing are equipped at least one outage 27.The present embodiment
In, the 5 preferred piezoelectric ultrasonic atomization device of atomising device, the piezoelectric ultrasonic atomization device includes being arranged on nozzle 23
The PZT (piezoelectric transducer) 24 on top.
Embodiment 2
The present invention also provides a kind of use to be equipped with atomization and the forming method of the three-dimensional model former of paving liquid device,
Comprise the following steps：
Three-dimensional model is done slicing delamination by step 1) by computer according to thickness is preset, if obtaining three-dimensional model
The dry stacking shaping figure with two-dimensional shapes；
The shaped platform 16 of 1 bottom of photocuring liquid container is moved to delivery altitude position, the delivery altitude by step 2)
Position is to cure optical projection device 9 to realize the height and position for curing light focusing, uses the atomising device 5 of the paving liquid device
In atomizer 23 by photocuring liquid mist be melted into fine drop, it is described paving liquid device along the guide rail 12 in the shaped platform
16 tops, which move horizontally, makes the fine drop be laid to first layer photocuring liquid on shaped platform 16；
Step 3) measures the height and position of current photocuring liquid level using liquid level detection device, by being mounted on rack 21
On the photophore 10 of liquid detection device send probing light to photocuring liquid level from flank angle, which consolidates in light
Change liquid level to be reflected, the photosensitive sensor 7 of the liquid detection device through being mounted in rack 21 receives, so as to detect photocuring liquid
Height；Declining the shaped platform 16 makes the liquid level of first layer solidify liquid be in the delivery altitude position, according to step 1)
In obtained the first formable layer figure, use and cure the projection of light projecting apparatus 9 and cure light curing schedule 2) in be laid with first
Layer photocuring liquid, cured part form first layer mould shapes；
Step 4) reuses the mist of the paving liquid device on the liquid level for having carried out cured last layer photocuring liquid
Makeup puts atomizer 23 in 5 and photocuring liquid mist is melted into fine drop, the paving liquid device along the guide rail it is described into
Being moved horizontally above type platform makes the fine drop be laid to next layer of photocuring liquid；
Step 5) measures the next layer of photocuring liquid level position using liquid detection device, and it is flat to decline the shaping
Platform 16 makes the liquid level of next layer of solidify liquid be in delivery altitude position, according to the next formable layer figure obtained in step 1), makes
Cure the middle next layer of photocuring liquid being laid with of the light curing step 4), cured part with the projection of light projecting apparatus 9 is cured
It forms next layer model shape, and the curing light for curing light projecting apparatus 9 and projecting sufficient amount, makes adjacent up and down two
The lap of formable layer figure is cured in together；
Step 6) repeated several times step 4) and step 5) are completed until the three-dimensional model of 3D solid is molded.
In the present embodiment, the forming method further includes, and scanning light by galvanometer or mobile mirror using laser consolidates
Change liquid surface, the step of curing to obtain three-dimensional model shape by optical solidified liquid by the high temperature generated.
Three-dimensional model former provided by the invention, specific operation principle is as described below, can more illustrate and understand this hair
Bright invention is intended to, 16 liftable of bottom, that is, shaped platform and opening upwards and energy of the photocuring liquid container 1 in the present invention
It is enough to be moved horizontally along guide rail 12, and the paving liquid device of photocuring liquid is laid in 1 upper surface of photocuring liquid container, detecting liquid level dress
The photosensitive sensor 7 for the 10 knead dough detection device of photophore put measures the liquid level position of photocuring liquid, will cure light and presses
Molding shape projects the curing light projecting apparatus 9 of photocuring liquid upper surface, above and below the bottom for driving photocuring liquid container 1
The driving device of the paving liquid device horizontal movement is moved and drives, the atomising device 5 spread in liquid device and bottom are set
There is a paving liquid housing 3 of drop equilibrium baffle 26, dress is there are two linear bearing 4 on paving liquid housing 3, and linear bearing 4 is along line slideway
12 slide in 1 upper horizontal of photocuring liquid container.Photocuring liquid is consolidated by photocuring liquid supplying device, such as peristaltic pump by light
Change liquid entrance 6 and enter atomising device 5, liquid atomizer may be employed in atomising device 5, preferably diameter is less than 1 millimeter of mist
Change nozzle, this nozzle makes optical solidified liquid be sprayed through tiny nozzle at a high speed, spray latter aspect due to liquid itself from
Load in bulk it is dynamic, on the one hand due to air effect, liquid being made to become fine drop, achievees the effect that atomization.Using atomising device 5 into
The another kind of row atomization is achieved in that, using pneumatic ultrasonic atomization nozzle, which is driven by compressed air
Liquid, and the concussion of ultrasonic wave air-flow is generated at nozzle, liquid is made to be atomized into fine drop by ultrasonic impact.The present embodiment
In, the equipment of the present invention is although can be used for using two kinds of atomising devices, from the point of view of precise forming, further preferably using another
A kind of supersonic atomizer containing PZT (piezoelectric transducer) 24, i.e. piezoelectric ultrasonic atomization device, also referred to as low-frequency ultrasonic waves spray
Head, 23 top of nozzle of the low-frequency ultrasonic waves nozzle are equipped with PZT (piezoelectric transducer) 24, also referred to as piezoelectric ceramic piece, generate 20kHz and arrive
The supersonic oscillations of some resonant frequency between 200kHz, and pass through ultrasonic transformer and make supersonic oscillations amplitude at atomizer 23
Maximum, the surface that the supersonic oscillations at the atomizer 23 enable the fine drop of liquid to depart from liquid can realize mist
Change, the diameter of the fine drop is usually between several microns to hundreds of microns.The light that the atomization of piezoelectric ultrasonic atomization device generates
The fine drop of solidify liquid itself has the kinetic energy of very little, is to decline according to freely falling body, (in the situation without considering air drag
Under).Although further can be suitably by applying electric field or air-flow, the movement for making these fine drops be more directional
(not shown), still, when the fine drop of this small kinetic energy falls into the photocuring liquid container 1, in photocuring liquid container 1
Molded model entity does not also generate the liquid in photocuring container 1 apparent disturbance almost without mechanical shock.This
Under conditions of not acting on force-disturbance, molded cured solid and unformed cured liquid are all static, in a timing
Between in the range of, that is, the displacement of molded cured solid caused by other interference is set less than the invention in the time range
Standby design formed precision, this time range depends on many factors, for example, the viscosity of photocuring liquid, molded cured
Even if it is flexible body that the three-dimensional models such as the shape of solid, which have hanging structure or molded cured solid, need not all support.
In practical application, due to external shock interference and thermal convection current, a small amount of support construction is preferred for prolonged hanging structure,
Nonetheless, this support construction can also significantly simplify because stress is small.As shown in figure 5, due to equilibrium in the present embodiment
Baffle 26 will block some fine drops, and the middle part of balanced 26 bottom of baffle spreads the local lowest part of liquid shell 3 higher than surrounding
Be provided with outage 27, preferably outage 27 is 4 or 6, in this way, the fine drop being blocked can converge after from outage 27
Outflow.Meanwhile as shown in Figure 1, the workbench 2 in rack 21 installs the periphery of photocuring liquid container 1 equipped with the recycling of photocuring liquid
Slot 15, flowed out through outage 27 and paving liquid device trickle down the photocuring liquid outside photocuring liquid container 1 when spreading liquid and pass through light
Solidify liquid accumulator tank 15 flows out, and the retracting device that photocuring liquid is arranged on 15 lower section of photocuring liquid accumulator tank is collected (in figure not
Draw) carry out recycling.Piezoelectric ultrasonic atomization device there are certain requirements the viscosity of aerosolizable photocuring liquid, be usually not more than
50 centipoises (cP) are crossed, heating unit further preferably is set on the atomising device 5 in the present embodiment, using doing for rise temperature
Method reduces the viscosity of photocuring liquid.It is molding that the viscosity of photocuring liquid in raising photocuring liquid container is conducive to three-dimensional model
Stablize, further, by installing cooling device outside photocuring liquid container 1, for reducing the temperature of its interior lights solidify liquid
Degree, so as to reduce the viscosity of photocuring liquid in container.Photocuring liquid energy is using photosensitive resin, photo-sensitive hydrogel or other photosensitive
Cured liquid.In addition, also adopt the scheme that the invention can be realized with photo-thermal curing.For example, with carbon dioxide laser by shaking
Mirror or mobile mirror scanning photocuring liquid surface, cure photocuring liquid by the high temperature generated.Wherein grenade instrumentation 9 is not only
It is limited to laser scanning device, moreover it is possible to using face projection arrangement, for example, the ultraviolet optical projection device using DLP technologies.Due to spreading liquid
Shaped platform 16 of the device on photocuring liquid container 1 is laid with very thin photocuring liquid, and thickness is less than 100um, and measurement light is consolidated
Formed precision can be improved by changing the actual height of liquid liquid level.In the present embodiment, liquid detection device selects optical reflection type detection dress
It puts, by probing light to be pointed into the photophore 10 of photocuring liquid level and receives 7 structure of photosensitive sensor of liquid level reflection probing light
Into photophore 10 uses small-power infrared laser, and photosensitive sensor 7 selects linear CCD or cmos image sensor part.
25 operation principle of equalizing tank is as described below in the present invention：The atomized liquid generated for specific solidify liquid, atomising device 5
Drop density can be expressed as three element complex, i.e. d (x, y, z), and wherein x, y are the horizontal coordinates with atomizer vertical plane, and z is work
Make the height of plane, that is, nozzle is to the distance of solidify liquid upper surface.Because working depth is fixed, i.e. z=z0, z0 are
Nozzle to solidify liquid upper surface operating distance, so the atomising device generate atomized drop density can be expressed as dz0
(x,y).For example, the atomized drop density curve schematic diagram as y=0, as shown in Figure 6.The fine drop that atomising device 5 generates exists
Density Distribution on working face is non-uniform, that is to say, that these fine drops fall on 1 upper surface shape of photocuring liquid container
Density into droplet distribution is non-uniform, and the photocuring liquid layer thickness that can be directly resulted in the paving liquid of atomising device 5 is uneven
It is even.It is illustrated that the unimodal drop density distribution curve that a kind of center density is high, actual distribution are also likely to be bimodal or more
The density profile at peak.It is thick in order to enable to be laid in 1 upper surface of photocuring liquid container using the paving liquid device of atomising device 5
Uniform photocuring liquid is spent, it is necessary to adjust its equivalent outlet size according to the density of droplet distribution, that is, adjust the equilibrium
25 opening width of slot is provided with the equalizing tank 25 of the opening of curve shape on the balanced baffle 26 of drop.As shown in fig. 7, it is
The opening of the equalizing tank 25 is projected to solidify liquid upper surface, the working motion of the equalizing tank 25 by Simplified analysis in the z-direction
Direction is width, i.e. x directions；The direction vertical with the width is length in the plane of movement of the equalizing tank 25
Direction, i.e. y directions, for the position y of any given length direction, the starting point that the equalizing tank 25 is slotted is expressed as x1 (y),
End point is expressed as x2 (y).During work, paving liquid housing 3, that is, equalizing tank 25, straight line uniform motion is done in the x-direction, is worked
Some y values position is corresponded on face, each position in x directions obtains the quantity of fine drop, that is, x directions paving liquid thickness, is one
It causes, as shown in formula (1)：
Thickness to cause operating fluid level y directions is also consistent, i.e., all directions thickness of entire plane is uniform, it is desirable that
The equalizing tank 25 is in active length scope, as shown in fig. 7, y1 corresponding each y values, A (y) into y2 is equal.So-called work
It is exactly the length that equalizing tank 25 corresponds to operating fluid level part as length, when the length of equalizing tank 25 is more than liquid level y direction sizes,
One section is active length among only.Such as the y1 to y2 of Fig. 7, for 25 both ends of equalizing tank not in the range of active length
Part should use and be suitble to the shape of processing in order to process；When working face y sizes are more than balanced slot length, that is to say, that paving
When full liquid level wants fine scanning, entire 25 length of equalizing tank is all active length.To make the equalizing tank 25 in active length model
It encloses, arbitrary y values in y1 to y2, A (y) is equal, can obtain 25 opening size of equalizing tank by the method for multipass numerical computations
Theoretical value, comprise the concrete steps that：
1) atomized drop density d z0 (x, y) is obtained by measuring；
2) according to the size of paving liquid housing 3, x1 (y) and x2 (y) is initially set to the position at the edge of shell both sides, fitted
When retaining safe distance in order to processing；
3) for ease of calculating, setting speed is constant v=1, and in y directions y1 to y2 sections, N number of y sampled points is taken to count
Calculate open curve, i.e. ys1, ys2, ys3 ... ysN；
4) first pass calculates, and makes y=ys1, ys2, ys3 ... ysN, calculates A (y) according to formula 1, and retains A's (y)
Minimum value Amin；
5) second compile scanning and calculate, make y=ys1, ys2, ys3 ... ysN, and A (y)=Amin, numerical solution x1 and x2,
Obtain the x1 (y) and x2 (y) of N number of y sampled points；For ease of calculating and processing, setting x1 and x2 is symmetrical along y-axis, i.e. x1<0, x2>0
And-x1=x2；
6) the theoretical shape of balanced channel opening is determined by x1 (y) and x2 (y).
It theoretically calculates, the equalizing tank 25 each point on length (y) direction in the range of active length corresponds to
The equalizing tank 25 along width (x) direction be open in the value of definite integral of atomized drop density of (x1 to x2) be normal
Amount.Because the simplification process in theory analysis, the errors of numerical computations and atomized drop dropping process it is non-linear, it is described
25 actual aperture width of equalizing tank also needs to do final fine tuning optimization according to actual measurement, and this fine tuning is reflected in theoretical calculation
On mean square deviation in the range of active length be no more than 10%.Corresponding N number of y sampled points, fine tuning after-opening width for x1t extremely
X2t, then,
(2) in formula, i=1,2,3 ... N, arithmetic mean of instantaneous value,
Mean square deviation,
In formula (5), which is less than 10%.
Present invention is not limited to the embodiments described above, in the case of without departing substantially from the substantive content of the present invention, this field skill
Any deformation, improvement, the replacement that art personnel are contemplated that each fall within protection scope of the present invention.
Claims (10)
1. a kind of three-dimensional model former, which is characterized in that the former includes the rack equipped with workbench (2)
(21), the workbench (2) is equipped with the photocuring liquid container (1) of tubular construction and opening upwards, is set in the tubular construction
Have and the shaped platform to move up and down (16) is connected with elevating lever (20), the tubular construction inner wall and the shaped platform
(16) sealing ring is equipped between, the elevating lever (20) is connected with the driving device (19) being arranged on bottom plate (18), it is described into
The top of type platform (16) is equipped with the paving liquid device that back and forth movement is carried out on guide rail (12), and the paving liquid device is with being arranged on machine
Horizontal drive apparatus connection on frame, the paving liquid device are equipped with paving liquid housing (3) and atomising device (5), the atomising device
(5) the photocuring liquid entrance (6) being connected with supply photocuring liquid device is equipped with, the atomising device (5) includes consolidating with the light
Change the atomizer (23) that liquid entrance (6) connects, the atomizer (23) is arranged in the paving liquid housing (3), the machine
On frame (21) be located at the shaped platform (16) above be equipped with cure light projecting apparatus (9), the rack (21) be located at it is described into
Liquid level positional detecting device is equipped with above type platform (16).
2. three-dimensional model former according to claim 1, which is characterized in that described paving liquid housing (3) bottom is equipped with equal
Weigh baffle (26), and the equilibrium baffle (26) is equipped with the equalizing tank (25) of opening, the working motion side of the equalizing tank (25)
To for width, the direction vertical with the width is length direction in the plane of movement of the equalizing tank (25), institute
It is corresponding along the described equal of the width to state equalizing tank (25) each point on the length direction in the range of active length
The relative mean square deviation of the constant volume score value of the atomized drop density to weigh in channel opening is no more than 10%.
3. three-dimensional model former according to claim 2, which is characterized in that it is described equilibrium baffle (26) be compared with into
Type platform (16) is in the low arcuate structure of intermediate high surrounding, the equilibrium baffle (26) and the friendship of described paving liquid housing (3) side wall
The minimum position of part for meeting place is equipped at least one outage (27).
4. three-dimensional model former according to claim 1, which is characterized in that the workbench (2) is equipped with photocuring
Liquid accumulator tank (15), photocuring liquid accumulator tank (15) lower part are equipped with photocuring liquid retracting device.
5. three-dimensional model former according to claim 1, which is characterized in that the atomising device (5) is sprayed including liquid
The one or more of mouth, air ultrasound nozzle or low-frequency ultrasonic waves nozzle.
6. three-dimensional model former according to claim 1, which is characterized in that the curing light projecting apparatus (9) is face
Projection arrangement or light-beam scanner.
7. three-dimensional model former according to claim 1, which is characterized in that set outside the photocuring liquid container (1)
There is cooling device.
8. three-dimensional model former according to claim 1, which is characterized in that be provided with and add on the atomising device (5)
Thermal.
A kind of 9. forming method of the three-dimensional model former described in usage right requirement 1, which is characterized in that the shaping side
Method comprises the following steps：
Three-dimensional model is done slicing delamination by step 1) by computer according to thickness is preset, and obtains three-dimensional model several
Stacking shaping figure with two-dimensional shapes；
The shaped platform (16) of photocuring liquid container (1) bottom is moved to delivery altitude position by step 2), uses the paving liquid
The atomising device (5) of device by photocuring liquid mist be melted into fine drop, it is described paving liquid device along the guide rail (12) it is described into
Being moved horizontally above type platform (16) makes the fine drop be laid to first layer photocuring liquid on shaped platform (16)；
Step 3) measures the height and position of current photocuring liquid level using liquid level positional detecting device, and it is flat to decline the shaping
Platform (16) makes the liquid level of first layer solidify liquid be in the delivery altitude position, according to the first formable layer figure obtained in step 1)
Shape, use to cure light projecting apparatus (9) and project cure light curing schedule 2) in the first layer photocuring liquid that is laid with, cured portion
Divide and form first layer mould shapes；
Step 4) reuses the mist of the paving liquid device on the liquid level for having carried out cured last layer photocuring liquid
Makeup puts (5) and photocuring liquid mist is melted into fine drop, and the paving liquid device is along the guide rail (12) in the shaped platform
(16) top, which moves horizontally, makes the fine drop be laid to next layer of photocuring liquid；
Step 5) measures the next layer of photocuring liquid level position using liquid level positional detecting device, decline it is described into
Type platform (16) makes the liquid level of next layer of photocuring liquid be in delivery altitude position, according to the next formable layer obtained in step 1)
Figure cures the middle next layer of photocuring liquid being laid with of the light curing step 4) using light projecting apparatus projection is cured, cures
Part form next layer model shape, and the curing light for curing light projecting apparatus (9) and projecting sufficient amount makes adjacent
The lap of two layers of two formable layer figures up and down is cured in together；
Step 6) repeated several times step 4) obtains the three-dimensional model shaping of 3D solid to step 5).
10. using the forming method of three-dimensional model former according to claim 9, it is characterized in that, the forming method
It further includes, photocuring liquid surface is scanned by galvanometer or mobile mirror using laser, is cured light liquid by the high temperature generated
The step of obtaining mould shapes.
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| DE102016116372A1 (en) * | 2016-09-01 | 2018-03-01 | Fit Ag | Component produced by additive manufacturing with a support structure |
| CN106827510B (en) * | 2017-01-24 | 2019-10-29 | 四川大学 | Light-sensitive material supply method and 3D printer system based on DLP principle |
| CN109399879B (en) * | 2018-12-14 | 2023-10-20 | 江苏筑港建设集团有限公司 | Curing method of dredger fill mud quilt |
| CN110920053B (en) * | 2019-11-28 | 2023-04-21 | 深圳摩方新材科技有限公司 | Device and method for continuous 3D printing by ultrasonic atomization coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1261293C (en) * | 2004-11-11 | 2006-06-28 | 西安交通大学 | Resin coating apparatus for light solidifying rapid forming technique |
| CN100544943C (en) * | 2007-01-19 | 2009-09-30 | 中国科学院广州电子技术研究所 | The resin level control of photocureable rapid shaping and the method and apparatus of resin-coating |
| CN103341961B (en) * | 2013-06-17 | 2016-07-06 | 耿得力 | A kind of hot melt material extrusion device |
| CN104149343B (en) * | 2014-07-29 | 2017-01-25 | 厦门达天电子科技有限公司 | Hot-melting material extruding device by use of flexible guide pipe |
| CN104325643B (en) * | 2014-10-18 | 2018-03-27 | 东莞市瑞迪三维电子科技有限公司 | A kind of method and its device for making 3D products |
| CN204196263U (en) * | 2014-10-18 | 2015-03-11 | 东莞市瑞迪三维电子科技有限公司 | A kind of device making 3D product |
| CN104626592B (en) * | 2015-03-10 | 2017-10-03 | 厦门达天电子科技有限公司 | The former and its forming method of a kind of three-dimensional model |
| CN104859152B (en) * | 2015-05-25 | 2018-06-26 | 厦门达天电子科技有限公司 | The former and its forming method of a kind of three-dimensional model |
| CN204640818U (en) * | 2015-05-25 | 2015-09-16 | 厦门达天电子科技有限公司 | A kind of former of three-dimensional model |
| CN105058787B (en) * | 2015-07-27 | 2018-03-23 | 厦门达天电子科技有限公司 | A kind of height position detector and its detection method in 3D printing working platform face |
| CN105014970B (en) * | 2015-07-31 | 2018-12-11 | 耿得力 | A kind of molding equipment and its forming method of photocuring three-dimensional model |
| CN105014972A (en) * | 2015-08-03 | 2015-11-04 | 朱沫 | Catalytic curing type 3D printing technology and printer |
| CN205148931U (en) * | 2015-11-19 | 2016-04-13 | 耿得力 | Three -dimensional scale model former |
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