CN205836030U - Quick 3D printing equipment based on liquid Stereolithography - Google Patents
Quick 3D printing equipment based on liquid Stereolithography Download PDFInfo
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- CN205836030U CN205836030U CN201620788435.1U CN201620788435U CN205836030U CN 205836030 U CN205836030 U CN 205836030U CN 201620788435 U CN201620788435 U CN 201620788435U CN 205836030 U CN205836030 U CN 205836030U
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Abstract
The utility model discloses a kind of quick 3D printing equipment based on liquid Stereolithography, including: object stage, liquid tank, polymerization inhibitor cavity, shaping membrane, lifting platform, actuator, environmental variable sensor and central controller；Described liquid tank is arranged on object stage, inside fills the liquid polymerizable thing for photocuring；Described polymerization inhibitor cavity is arranged on below described liquid tank；Described shaping membrane is arranged between described liquid tank and polymerization inhibitor cavity；Described actuator, including motion and Digital Light Processor；Described central controller is connected with described actuator and environmental variable sensor.This utility model quick 3D printing equipment based on liquid Stereolithography accelerates the speed of Stereolithography, improve shaped object precision, print speed precision is adjustable, improves the physical characteristic of printing objects, weakens the dependence to supporting construction in print procedure of the Stereolithography technology.
Description
Technical field
This utility model relates to 3D rapid shaping technique field, and a kind of quick 3D based on liquid Stereolithography beats
Printing equipment is put.
Background technology
3D prints the important method as rapid shaping, different from traditional cutting technology, is a kind of increasing material manufacturing technology.
3D prints based on the three-dimensional digital model file after intelligent processing method, obtains model slice, uses thermofusible to close
Or the material such as curable liquid, by the way of layering processing, superposition forming, " successively increasing material " generates 3D solid.3D
The relatively conventional manufacture of printing technique more saves material, is more suitable for the production of personalized product, especially cuts skill
Art is difficult to the labyrinth object produced.3D printing technique has been widely used for the field such as medical medicine, military affairs, this technology
Popular society will be made to create possibility, the creativity liberating each Social Individual further is worth.But print speed,
Printing precision and materials demand are the bottlenecks limiting the development of 3D printing technique.
Stereolithography apparatus (SLA) and numeral optical processing (Digital Light Processing, DLP) are with liquid
Curable materials is the common 3D printing technique printing raw material.DLP technology generally uses ultraviolet light beam to project to be contained in liquid
In groove transparent, have the liquid photosensitive resin of stickiness, be allowed to rapid polymerization solidification, under the lifting of lifting platform, solidification is stacked into layer by layer
Final object.
But, due to filling liquid resin and reserve the needs in solidification space after each solidification, object solidification face needs anti-
Subdivision is from shaping membrane, reorientation, and this makes print speed can only achieve millimeter rank hourly.The most successively projection solidification is made
Become and print rough object surfaces, and the most unsatisfied mechanical characteristic of the thing followed, make photocuring class method
Application obtain the biggest restriction.
Utility model content
Based on this, it is based on liquid Stereolithography quick that this utility model provides that a kind of print speed is fast, precision is high
3D printing equipment.
In order to realize the purpose of this utility model, this utility model by the following technical solutions:
A kind of quick 3D printing equipment based on liquid Stereolithography, including:
Object stage；
Liquid tank, is arranged on object stage；The liquid polymerizable thing for photocuring is filled in described liquid tank；
Polymerization inhibitor cavity, correspondence is arranged on below described liquid tank；This polymerization inhibitor cavity is equipped with being used for suppressing liquid under irradiation
The polymerization inhibitor of state polymerizable thing polyreaction；
Shaping membrane, is arranged between described liquid tank and polymerization inhibitor cavity；Described shaping membrane has translucidus and inhibitor
Through ability, form one layer according to described polymerization inhibitor through shaping membrane and liquid polymerizable thing effect, described shaping membrane upper surface
Uncured liquid level；
Lifting platform, for connecting by printing objects；
Actuator, including motion and Digital Light Processor, described motion connects described lifting platform to drive
The movement of lifting platform；Described Digital Light Processor is positioned at the lower section of described polymerization inhibitor cavity, after suitable modulation of source, thoroughly
Cross described polymerization inhibitor cavity, shaping membrane projects in liquid tank, causes polymerization crosslinking curing reaction；
Environmental variable sensor, is used for monitoring environmental variable；And
Central controller, this central controller is connected with described actuator and environmental variable sensor.
Wherein in an embodiment, described liquid tank, polymerization inhibitor chamber, shaping membrane are connected to one by a securing member respectively
Rise, be fixed on described object stage, and detachably.
Wherein in an embodiment, described securing member is ring screw securing member, and the inwall of securing member is provided with screw thread；Institute
State the outer wall of the bottom outer wall of liquid tank, the top exterior walls of polymerization inhibitor cavity and shaping membrane be equipped with external screw thread with described fastening
The screw thread corresponding matching of part.
Wherein in an embodiment, described liquid tank and a fluid supply conduit communicate, to ensure the liquid in liquid tank
The abundance of state polymerizable thing；This polymerization inhibitor cavity and polymerization inhibitor supply line connection；Described actuator also includes pipeline pump
And pipeline valve, described pipeline pump and pipeline valve are positioned on fluid supply conduit and polymerization inhibitor supply line.
Wherein in an embodiment, described actuator also includes heater, radiator；Described heater is installed on liquid
The bottom of body groove is to add hot liquid in good time；Described radiator is placed in liquid tank bottom, with the heat of Light Curing release of dissipating,
Control printing environment temperature.
Wherein in an embodiment, described environmental variable sensor includes that temperature sensor, pressure transducer, liquid level pass
Sensor, velocity sensor, liquid viscosimeter, photodetector；Described temperature sensor is placed on shaping membrane to monitor liquid
Temperature；Described pressure transducer supplies pressure with monitoring polymerization inhibitor in being placed in described polymerization inhibitor cavity；Described liquid level sensor is used
Fluid level in monitoring liquid tank；Described velocity sensor directly and indirectly monitors movement velocity and the position of lifting platform,
For regulating print speed and position feedback；Described photodetector is for monitoring the modulation photoirradiation of described Digital Light Processor
Intensity.
Quick 3D printing equipment based on liquid Stereolithography of the present utility model passes through formed uncured liquid
Layer so that lifting platform need not to promote repeatedly, fill liquid, reorientation, projection solidification, but produced by lifter motion
Fluid pressure nature filling liquid polymerizable thing, thus realize lifter motion continuously and Light Curing.
Accompanying drawing explanation
In Fig. 1 is based on liquid Stereolithography the quick 3D printing equipment of a preferred embodiment of the present utility model
Portion's structural representation.
Fig. 2 is the schematic diagram of another angle of based on liquid Stereolithography the quick 3D printing equipment of Fig. 1, Qi Zhongzai
Thing platform, liquid tank and polymerization inhibitor cavity are in cutting setting open.
Fig. 3 is partial schematic diagram and the magnified partial view of based on liquid Stereolithography the quick 3D printing equipment of Fig. 2.
Fig. 4 is the control system logic chart of quick 3D printing equipment based on liquid Stereolithography of the present utility model.
Fig. 5 is the print speed control method of quick 3D printing equipment based on liquid Stereolithography of the present utility model
Logic chart.
Fig. 6 is the method for work flow chart of quick 3D printing equipment based on liquid Stereolithography of the present utility model.
Fig. 7 is the ' In System Reconfiguration Method signal of quick 3D printing equipment based on liquid Stereolithography of the present utility model
Figure.
Detailed description of the invention
For the ease of understanding this utility model, this utility model will be described more fully below.But, this practicality
Novel can realize in many different forms, however it is not limited to embodiment described herein.On the contrary, provide these to implement
The purpose of example is to make the understanding to disclosure of the present utility model more thorough comprehensively.
Unless otherwise defined, all of technology used herein and scientific terminology are led with belonging to technology of the present utility model
The implication that the technical staff in territory is generally understood that is identical.At term used in the description of the present utility model it is simply herein
The purpose of specific embodiment is described, it is not intended that in limiting this utility model.
Refer to Fig. 1 to Fig. 3, for based on liquid Stereolithography the quick 3D of this utility model one better embodiment
Printing equipment, the liquid tank 20 including object stage 10, being arranged on object stage 10, to should polymerization inhibitor chamber below liquid tank 20
Body 30, the shaping membrane 40 being arranged between liquid tank 20 with polymerization inhibitor cavity 30, lifting platform 50, it is connected the fitness machine of lifting platform 50
Structure 60, Digital Light Processor (Digital Light Processing, DLP) 70 and central controller 80.
Described quick 3D printing equipment based on liquid Stereolithography is the operating room of a sealing in the present embodiment, institute
State object stage 10 and be arranged on the position, middle and lower part of this quick 3D printing equipment based on liquid Stereolithography, and will be based on liquid
The quick 3D printing equipment of Stereolithography is divided into the Photocopy Room 15 of superposed sealing and is positioned at the canyon 16 of bottom.
Described liquid tank 20 is arranged on object stage 10, and is positioned in Photocopy Room 15.Hold for light in this liquid tank 20
The liquid polymerizable thing 21 of solidification.This liquid tank 20 communicates with a fluid supply conduit 22, to ensure the liquid in liquid tank 20
The abundance of polymerizable thing 21.This liquid tank 20 is fixed with object stage 10 by securing member 25, and detachably connects with object stage 10
Connect.Described securing member 25 is ring screw securing member, and the inwall of securing member 25 is provided with screw thread.
Described polymerization inhibitor cavity 30 is arranged on below object stage 10, and is positioned in canyon 16.In this polymerization inhibitor cavity 30
It is full of for suppressing the polymerization inhibitor 31 of liquid polymerizable thing polyreaction under irradiation.This polymerization inhibitor cavity 30 and a polymerization inhibitor supply
Pipeline 32 connects.This polymerization inhibitor cavity 30 is fixed with object stage 10 by securing member 25, and removably connects with object stage 10.
Described shaping membrane 40 is arranged on object stage 10, and between liquid tank 20 and polymerization inhibitor cavity 30, is used for supplying
Polymerization inhibitor 31 penetrates into bottom liquid tank 20 through described shaping membrane 40.In the present embodiment, this shaping membrane 40 connects liquid tank
20, under connect polymerization inhibitor cavity 30.Shaping membrane 40 is this utility model quick 3D printing equipment based on liquid Stereolithography
Core component, is made up of composite.This composite has translucidus and certain polymerization inhibitor through ability, for printed
Cheng Zhong, polymerization inhibitor 31 is through shaping membrane 40, the curing reaction of suppression liquid polymerizable thing 21, and surface maintains one layer not admittedly thereon
The liquid polymerizable thing changed, it is ensured that Light Curing is carried out continuously.This layer of uncured liquid polymerizable thing, referred to as uncured liquid
Body layer.Shaping membrane 40 is by having the thin polymer film laminated of translucidus and polymerization inhibitor permeability or being bonded in one in the present embodiment
Make on support member.
Specifically, the bottom outer wall of described liquid tank 20, the top exterior walls of polymerization inhibitor cavity 30 and the outer wall of shaping membrane 40
It is equipped with external screw thread with the screw thread corresponding matching with described securing member 25, therefore liquid tank 20, polymerization inhibitor cavity 30 and shaping membrane
40 are screwed together together by securing member 25, be fixed on object stage 10, and detachably, this structure makes it possible to basis
Different printing demands and printing environment, use different above-mentioned parts, and the type of such as shaping membrane needs and polymerization inhibitor, light source
Selection match；And above-mentioned parts are replaced when needs are changed, convenient and swift.
Described lifting platform 50 is driven by motion 60, and for lifting by printing objects 100, lifting platform 50 is positioned at liquid tank
The top of 20.The bottom of lifting platform 50 and be coated with one layer between printing objects 100 for the adhesive films bonding object
55, dissolve in specific solvent, soak after print procedure terminates the most just can by by printing objects 100 from liter
Separate on fall platform.This adhesive films 55 can be by spraying formation to lifting platform 50 lower surface before 3D prints.
Described motion 60 includes connecting the Z axis shifter 61 of lifting platform 50, the X-axis of connection Z axis shifter 61 moves
Device 62 and the Y-axis shifter 63 of connection X-axis shifter 62；This motion 60 accepts the instruction of central processing unit 80, by electricity
Machine accurately controls movement velocity and the position of lifting platform 50, it is achieved the synergy movement on tri-directions of X, Y, Z, to coordinate light solid
Change print procedure.Specifically, this motion 60 is a kind of crosshead shoe motion platform.
Described Digital Light Processor 70 is placed in canyon 16, is spatially positioned in the lower section of polymerization inhibitor cavity 30, will be suitable
Modulation of source after, project in liquid tank 20 through polymerization inhibitor cavity 30, shaping membrane 40, cause polymerization crosslinking solidification anti-
Should.
This utility model quick 3D printing equipment based on liquid Stereolithography also includes some for monitoring environment change
The environmental variable sensor measured and the actuator being used for regulating and controlling print procedure.
Described environmental variable sensor includes temperature sensor, pressure transducer, liquid level sensor, velocity sensor, liquid
Body viscometer, photodetector etc..Described temperature sensor is placed on shaping membrane 40, is used for monitoring temperature of liquid, it is ensured that peace
Full printing environment (equipment is safe, by printing objects 100 safety), provides foundation for regulation and control print speed simultaneously；Pressure sensing
In device is placed in Photocopy Room 15 and in polymerization inhibitor cavity 30, in monitoring the environmental stress in Photocopy Room 15 and polymerization inhibitor cavity 30
Polymerization inhibitor supply pressure, for regulation and control print speed provide foundation；The fluid level of level sensor monitors liquid tank 20；Speed
Sensor directly and monitors movement velocity and the position of lifting platform 50 indirectly, is used for regulating print speed and position feedback；Light
Electric explorer, for monitoring the modulation light intensity of Digital Light Processor 70, provides foundation for regulation and control print speed.Above-mentioned
Various types of data in sensor acquisition printer running environment, feeds back to central processing unit 80, provided decision-making foundation, is formed
The closed-loop control system of printer.
Described actuator includes described motion 60, heater, radiator, pipeline pump, pipeline valve and described numeral
Optical processor 70 etc..Described heater is installed on the bottom of liquid tank 20, adds hot liquid in good time, and then accelerates to print speed
Degree；Described radiator is placed in liquid tank 20 bottom, for the heat of Light Curing release of dissipating, controls printing environment temperature；
Described pipeline pump and pipeline valve are positioned on fluid supply conduit, compressed gas pipeline and polymerization inhibitor supply line.Described digital light
Processor 70 is placed in canyon 16, for controlling the irradiation intensity of each frame, projection picture, single frames projection time, and then regulation
Print speed, printing precision；Each actuator is connected with central processing unit 80, and tune is made in the instruction accepting central processing unit 80
Whole, it is achieved print procedure.
During work, the liquid polymerizable thing 21 in liquid tank 20 is by meeting the liquid free radical polymerizable that shaped object requires
Monomer and a certain amount of suitable light trigger mix.As: the free radical polymerization monomers such as acrylate add light trigger
As liquid polymerizable thing.When being positioned at the Digital Light Processor below polymerization inhibitor cavity, the load that Digital Light Processor 70 is sent
The ultraviolet light image 75 having object dimensional model slice information is projected in liquid tank 20 through polymerization inhibitor cavity 30, shaping membrane 40
Time, the light trigger in liquid polymerizable thing 21 absorbs the energy of specific wavelength and produces free radical, liquid free radical polymerizable list
Body and free radical generation polymerization crosslinking curing reaction, generate by printing objects 100.
Wherein, in order to make Light Curing be carried out continuously, polymerization inhibitor 31 is passed through polymerization inhibitor cavity 30.Polymerization inhibitor 31 passes through
The Free Radical that shaping membrane 40 produces with the light trigger in liquid polymerizable thing 21, it is suppressed that the freedom that light trigger produces
Base is polymerized with liquid free radical polymerization monomer so that the polymerizable thing curing reaction near shaping membrane 40 is suppressed, so that
Shaping membrane 40 upper surface forms one layer of uncured liquid level, referred to as uncured liquid layer 36.This makes lifting platform 50 need not
Promote repeatedly, fill liquid, reorientation, projection solidification, and the fluid pressure being dependent in lifter motion producing is filled naturally
Liquid polymerizable thing 21, thus realize continuous print solidification process.Print speed is greatly improved, and with threedimensional model projection frame number without
Close.
In this utility model, choosing of described polymerization inhibitor 31 matches with liquid polymerizable thing 21, light trigger, selects
The radiation source of specific wavelength matches with light trigger.As added light trigger for above-mentioned liquid free radical polymerization monomer
The liquid polymerizable thing mixed, usual oxygen is as polymerization inhibitor, and ultraviolet light beam is as projection light source.When oxygen is in monomer
Dissolubility reaches 10-3During mol/L, just have strong inhibition [with reference to from Pan Zuren. polymer chemistry. chemical industry goes out
Version society .].Uncured liquid bulk layer thickness 36 and polymerization inhibitor type, shaping membrane permeability properties, polymerization inhibitor pressure, modulation photoirradiation are strong
The factors such as degree are relevant.And there is the safe thickness making above-mentioned continuous light solidification process stably carry out, in print procedure, this is uncured
Liquid layer thickness cannot be less than safe thickness.
In the Light Curing of quick 3D printing equipment based on liquid Stereolithography of the present utility model, polymerization inhibitor is saturating
The Free Radical that overmolding film produces with light trigger, the polymerizable thing curing reaction near shaping membrane is suppressed, so that becoming
Type film surface forms one layer of uncured liquid level.This fluid pressure that lifting platform is produced by lifter motion is filled naturally
Liquid polymerizable thing, it is not necessary to promote repeatedly, fill liquid, reorientation, projection solidification, it is achieved lifter motion is solid with light continuously
Change process, print speed is fast, precision is high, and unrelated with threedimensional model projection frame number.
As described in Fig. 4 and Fig. 5, this utility model also provides for a kind of quick 3D printing equipment based on liquid Stereolithography
System control method, including print speed control method, printing precision control method and safe operating conditions, respectively around beating
Three aspects of print-out rate, printing precision and safe operating conditions adjust each control parameter, it is ensured that print procedure is smoothed out；This base
System control method in the quick 3D printing equipment of liquid Stereolithography comprises the following steps:
Step one, it is provided that described quick 3D printing equipment based on liquid Stereolithography, should be light-cured into based on liquid
The quick 3D printing equipment of type includes object stage 10, be arranged on object stage 10 liquid tank 20, to should be below liquid tank 20
Polymerization inhibitor cavity 30, the shaping membrane 40 being arranged between liquid tank 20 with polymerization inhibitor cavity 30, lifting platform 50, be connected lifting platform
Motion 60, Digital Light Processor 70 and central controller 80, environmental variable sensor and the actuator of 50, described central authorities
Processor and environmental variable sensor, actuator collectively form control system；Described control system with above-mentioned print speed,
Printing precision, safe operating conditions are decision criteria；
Step 2, described control system, according to the characteristic of target entity and selected printing solution, passes through environmental variable
Environmental variable during printing is monitored by sensor, and each environmental variable state of monitoring is sent to central controller
80, provided decision-making foundation；
Step 3, central processing unit generates control command after receiving each environmental variable state of described monitoring and is sent to institute
State actuator execution action；
Step 4: environmental variable is produced and changes by described actuator；Return step 2, form closed loop feedback, so that
Photocuring print procedure is normally carried out, and reaches expection printing effect.
Specifically, the liquid polymerizable thing 21 for photocuring in described environmental variable includes described liquid tank 20
Temperature of liquid, liquid viscosity, liquid tank liquid level, lifting speed etc.；Described actuator include Digital Light Processor, heater,
Pipeline pump, pipeline valve etc.；The action of described actuator includes adjusting modulation light intensity, single frames projection time, temperature, pressure
Power, lifting platform movement velocity etc.；
The lifting speed of described 3D print speed, i.e. lifting platform 50, is the key index of 3D printing technique.
The lifting speed of lifting platform 50 is determined by motor.But print speed must not be filled with liquid higher than laser curing velocity
Speed, is the result in many ways under factors.Laser curing velocity represents liquid under modulation photoirradiation, curing reaction fast
Slowly；After liquid filling speed represents lifting platform 50 lifting, the speed in the space that therefore fluid filled is formed.For different printings
Target, key determinant is different.Therefore by improving laser curing velocity and liquid filling speed, printing speed can be improved
Degree.
Wherein, laser curing velocity and modulation light intensity, liquid polymerizable thing characteristic, light trigger characteristic, light source etc.
Factor is correlated with.When laser curing velocity is limiting factor, print speed can approximate and be equal to curing reaction speed.Elected
When determining liquid polymerizable thing, light source, light trigger, irradiation intensity φ is the biggest, and in certain time, cured thickness is the thickest, photocuring speed
Spend the fastest.
For the entity that solidification face is bigger, liquid filling speed is notable on print speed impact.Filling speed glues with liquid
Degree, pressure, uncured liquid bulk layer thickness and want the solidification face geometric properties of printing objects relevant.Liquid polymerizable thing viscosities il
The least, filling speed is the fastest；Pressure P is the biggest, and filling speed is the fastest；Uncured liquid bulk layer thickness d between solidification face and shaping membrane
The biggest, filling speed is the fastest；And printing objects solidification face S is the least, filling speed is the fastest.
Described print speed control method includes that the one in following three kinds of modes or more than one mode are entered simultaneously
OK: A, by liquid in heater heating tank, increase environmental stress or increase uncured liquid bulk layer thickness, the liquid described in quickening
Filling speed；B, by regulation irradiation intensity, ensure resolution when accelerate described curing reaction speed；C, described
Print speed matches with laser curing velocity, liquid filling speed, finds out rational parameter configuration in the regulation of control system,
Particularly avoid overcuring and solidify the appearance of incomplete situation, it is ensured that print procedure is smoothed out.
Printing precision directly determines the physical characteristic of shaped object and whether meets application requirement.Vertical resolution and water
Square to pixel size together decided on printing precision.Due to solidification continuously, print speed is unrelated with projection frame number.
By increasing digital light projection frame number, i.e. substantial increase threedimensional model slice numbers, just can ensure that in satisfied print speed
Under, improve shaped object vertical direction precision, also thus improve by the physical characteristic of printing objects.As play single frames figure
As the difference with broadcasting video, vertical printing precision can be better than required surface resolution.And the precision of horizontal direction by
The pixel size of DLP parts itself determines.
Therefore, described printing precision control method includes that the one or two kinds of in the following two kinds mode is carried out simultaneously: A,
Increase digital light projection frame number to improve the precision of shaped object vertical direction；B, the pixel size of adjustment DLP parts itself change
Become the precision of horizontal direction.
Described safe operating conditions mainly includes ambient temperature, uncured liquid bulk layer thickness, fluid level.Photocuring reaction
Being exothermic process, ambient temperature must monitor in real time, must not be higher than the safe temperature run by printing objects and equipment, if desired
Can be by the heat of radiator dissipation curing reaction release.Polymerization inhibitor through shaping membrane solidifies face and shaping membrane table at object
The uncured liquid layer maintained between face is the key realizing continuous light solidification, and the thickness of uncured liquid body portion is crossed thin meeting and caused
Print procedure is unstable, causes continuous light to solidify unsuccessfully.Irradiation intensity is the strongest, due to solidification inhibitory action formed uncured
The thickness of liquid level is the thinnest.In print procedure, keep irradiation intensity in safety range.Fluid level needs also exist for being protected
Card, too low liquid tank liquid level can cause printing unsuccessfully.
Thus, described safe operating conditions need to meet following requirement: A, ambient temperature must not be higher than by printing objects and set
The safe temperature of received shipment row, as necessary by the heat of radiator dissipation curing reaction release；B, uncured liquid bulk layer thickness are logical
Overregulate irradiation intensity in Safety Irradiation intensity φsafeIn, the safe thickness stable more than ensureing continuous light solidification process；C, liquid
Position level need to meet the safety levels level of printing objects；D, above variable are obtained by described environmental variable Sensor monitoring
Ensure.
As shown in FIG. 6 and 7, this utility model also provides for a kind of quick 3D printing equipment based on liquid Stereolithography
Method of work, comprise the following steps:
Step S0, configures a quick 3D printing equipment based on liquid Stereolithography and measures its systematic parameter；This base
Quick 3D printing equipment in liquid Stereolithography includes: object stage 10, the liquid tank 20 being arranged on object stage 10, correspondence
Polymerization inhibitor cavity 30 below this liquid tank 20, the shaping membrane 40 being arranged between liquid tank 20 and polymerization inhibitor cavity 30, lifting
Platform 50, the connection motion 60 of lifting platform 50, Digital Light Processor 70 and central controller 80；According to target print object
Demand, coordinates and selects the liquid polymerisable thing 21 suitably inserting in liquid tank 20, the polymerization inhibitor inserted in polymerization inhibitor cavity 30
31, the determination of the light source of the specific wavelength of Digital Light Processor 70, i.e. printing solution；Measure the systematic parameter under above-mentioned configuration；
Step S1, the systematic parameter obtained according to the measurement of step S0, selected suitable operational factor；This operational factor bag
Include: irradiation intensity, projection frame number, single frames projection time, lifting platform promote speed and lifting platform initial position；
Step S2, according to the operational factor that step S1 is selected, initializes quick 3D based on liquid Stereolithography and prints
The control system of device, starts to print；
Step S3, Digital Light Processor 70 is by modulated light source, with projection frame number selected in step S1, irradiation intensity
With single frames projection time, project to liquid tank 20, liquid polymerisable thing generation polymerization crosslinking curing reaction；
Step S4, motion 60 starts to promote lifting platform 50 from initial position with the lifting speed that step S1 is selected；
Step S5, step S3, S4 work in coordination, and carry out simultaneously；
Step S6, carries out step S5, until playing the section of all objects threedimensional model, print procedure terminates；
Step S7, dismantles lifting platform 50, is placed in the cleaning solvent of solubilized binding agent, in order to will be by printing objects
100 separate from lifting platform.
For identical printing type, step S0 only need to do the system configuration parameter once obtaining necessity, the most specifically
Print procedure from the beginning of S1, each print out task needs selected suitable operational factor when starting.
In above-mentioned step S0, a specific embodiment of described quick 3D printing equipment based on liquid Stereolithography
For: liquid polymerisable thing 21 is oxygen by liquid free radical polymerization monomer crylic acid ester mixture light trigger, polymerization inhibitor 31, institute
The light source stating Digital Light Processor 70 is ultraviolet light, and described shaping membrane 40 is by fluoropolymer Teflon AF 2400 thin film and gathers
Dimethyl siloxane (PDMS) or micropore glass support member form through bonding or laminated；These will affect systematic parameter measure
With choosing of operational factor.
Further, also including the setting to some variablees in described step S0, these variablees include polymerization inhibitor pressure, liquid
Temperature, liquid viscosity, liquid tank liquid level, fluid pressure, ambient temperature etc..
Further, the method for the systematic parameter measured under above-mentioned configuration in described step S0 comprises the following steps:
S01: measure the relation between uncured layer thickness and irradiation intensity, and Safety Irradiation intensity φsafe；Due to this
The 3D method of work of utility model depends on the polymerization inhibitor through shaping membrane and maintains between object solidification face and shaping membrane surface
Uncured liquid layer, irradiation intensity is the strongest, and uncured layer thickness is the thinnest；When uncured layer thickness is too small, this solidification process
Become unstable, may cause printing unsuccessfully.When step S0 is given print allocation plan after, can measure be guaranteed printed
Safety Irradiation intensity φ that journey is normally carried outsafeThe safety range of 30 μm-200 μm (the such as uncured layer thickness take), printer
The irradiation intensity of work must not be higher than φsafe；And the measuring method of relation is as follows between uncured layer thickness and irradiation intensity:
Lifting platform drops to distance shaping membrane height h, and the projection time keeping certain is constant, changes irradiation intensity φ and enters
Row test of many times, measures the thickness of successful curing diaphragm, i.e. cured thickness dcured；H and cured thickness dcuredDifference i.e. this irradiation
Uncured layer thickness d under intensityuncured.Repeatedly Cyclic test, obtains uncured layer thickness duncuredAnd between irradiation intensity φ
Changing Pattern；
S02: measure the relation between curing rate and irradiation intensity；Lifting platform is dropped to distance shaping membrane height h, protects
Hold certain projection time constant, in Safety Irradiation intensity φ described in S01safeIn, adjust irradiation intensity φ and repeatedly try
Test, measure corresponding cured thickness dcured；Repeatedly Cyclic test, obtains cured thickness dcuredAnd the change between irradiation intensity φ
Law, and then obtain the relation between exposure light intensity φ and curing rate；
S03: measure lifting platform and promote the matching relationship between speed, irradiation intensity；The lifting speed of lifting platform must not be high
In laser curing velocity and liquid filling speed and cooperating therewith, strong with irradiation in conjunction with the curing rate measured in above-mentioned S02
Relation between degree, obtains suitable lifting platform by test of many times and promotes coordinating between speed and irradiation intensity interval
Relation v=f (φ), wherein φ ∈ [φmin,φsafe], v ∈ [v1,v2]；
Wherein, the order of above-mentioned steps S01 and S02 can be exchanged；It addition, step S01 and S02 are due to the method phase used
With, can carry out simultaneously；
Further, the systematic parameter arrived based on the measurement of above-mentioned steps S0, the selected suitably operation in described step S1
Parametric technique is as follows:
S11: selected lifting platform promotes speed v, i.e. print speed；Promote according to the lifting platform recorded in above-mentioned steps S03
Matching relationship v=f (φ) between speed and irradiation intensity interval, therefrom select suitable lifting platform promote speed v with
Irradiation intensity φ.
S12: selected projection frame number N；Increase digital light projection frame number, i.e. increase the number of threedimensional model section, just can protect
Demonstrate,prove under satisfied print speed, improve the precision of shaped object vertical direction, also thus improve by the physics of printing objects 100
Characteristic；The precision of horizontal direction is determined by the pixel size of DLP parts itself；Physical print precision as requested, it is right to obtain
The threedimensional model slice numbers answered, i.e. projection frame number N；
S13: selected single frames projection time Δ t；The lifting platform drawn by S11 promotes speed v and S12 projection frame number N obtains
Single frames projection time Δ t.
Wherein, the order of above-mentioned steps S11 and S12 can be exchanged.
For identical printing type, step S0 only need to do the configuration parameter once obtaining necessity, and the most concrete beats
Print process is from the beginning of S1, and each print out task selectes suitable operational factor when starting.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to this utility model the scope of the claims.It should be pointed out that, common for this area
For technical staff, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these all belong to
In protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (6)
1. a quick 3D printing equipment based on liquid Stereolithography, it is characterised in that including:
Object stage；
Liquid tank, is arranged on object stage；The liquid polymerizable thing for photocuring is filled in described liquid tank；
Polymerization inhibitor cavity, correspondence is arranged on below described liquid tank；This polymerization inhibitor cavity is equipped with being used for suppressing the liquid under irradiation can
The polymerization inhibitor of polymer polymerizing reaction；
Shaping membrane, is arranged between described liquid tank and polymerization inhibitor cavity；Described shaping membrane has translucidus and inhibitor passes through
Ability, according to described polymerization inhibitor through shaping membrane and liquid polymerizable thing effect, described shaping membrane upper surface forms one layer admittedly
The liquid level changed；
Lifting platform, for connecting by printing objects；
Actuator, including motion and Digital Light Processor, described motion connects described lifting platform to drive lifting
The movement of platform；Described Digital Light Processor is positioned at the lower section of described polymerization inhibitor cavity, after suitable modulation of source, through institute
State polymerization inhibitor cavity, shaping membrane projects in liquid tank, causes polymerization crosslinking curing reaction；
Environmental variable sensor, is used for monitoring environmental variable；And
Central controller, this central controller is connected with described actuator and environmental variable sensor.
Quick 3D printing equipment based on liquid Stereolithography the most according to claim 1, it is characterised in that: described liquid
Body groove, polymerization inhibitor chamber, shaping membrane are linked together by a securing member respectively, are fixed on described object stage, and detachably.
Quick 3D printing equipment based on liquid Stereolithography the most according to claim 2, it is characterised in that: described tightly
Firmware is ring screw securing member, and the inwall of securing member is provided with screw thread；The bottom outer wall of described liquid tank, the top of polymerization inhibitor cavity
The outer wall of portion's outer wall and shaping membrane is equipped with external screw thread with the screw thread corresponding matching with described securing member.
Quick 3D printing equipment based on liquid Stereolithography the most according to claim 1, it is characterised in that: described liquid
Body groove and a fluid supply conduit communicate, to ensure the abundance of the liquid polymerizable thing in liquid tank；This polymerization inhibitor cavity and one
Polymerization inhibitor supply line connects；Described actuator also includes that pipeline pump and pipeline valve, described pipeline pump and pipeline valve are positioned at liquid
On body supply line and polymerization inhibitor supply line.
Quick 3D printing equipment based on liquid Stereolithography the most according to claim 1, it is characterised in that hold described in:
Row mechanism also includes heater, radiator；Described heater is installed on the bottom of liquid tank to add hot liquid in good time；Described heat radiation
Device is placed in liquid tank bottom, with the heat of Light Curing release of dissipating, controls printing environment temperature.
Quick 3D printing equipment based on liquid Stereolithography the most according to claim 5, it is characterised in that: described ring
Border rate-of-change sensor includes temperature sensor, pressure transducer, liquid level sensor, velocity sensor, liquid viscosimeter, light electrical resistivity survey
Survey device；Described temperature sensor is placed on shaping membrane to monitor temperature of liquid；Described pressure transducer is placed in described polymerization inhibitor
With monitoring polymerization inhibitor supply pressure in cavity；Described liquid level sensor is for monitoring the fluid level of liquid tank；Described speed passes
Sensor directly and indirectly monitors movement velocity and the position of lifting platform, is used for regulating print speed and position feedback；Described light
Electric explorer is for monitoring the modulation light intensity of described Digital Light Processor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620788435.1U CN205836030U (en) | 2016-07-25 | 2016-07-25 | Quick 3D printing equipment based on liquid Stereolithography |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620788435.1U CN205836030U (en) | 2016-07-25 | 2016-07-25 | Quick 3D printing equipment based on liquid Stereolithography |
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| Publication Number | Publication Date |
|---|---|
| CN205836030U true CN205836030U (en) | 2016-12-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042388A (en) * | 2016-07-25 | 2016-10-26 | 东莞中国科学院云计算产业技术创新与育成中心 | 3D printing device, control system of 3D printing device and work method of 3D printing device |
| CN108515710A (en) * | 2018-06-21 | 2018-09-11 | 宁波市石生科技有限公司 | A kind of efficient photocuring 3D printing equipment |
-
2016
- 2016-07-25 CN CN201620788435.1U patent/CN205836030U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042388A (en) * | 2016-07-25 | 2016-10-26 | 东莞中国科学院云计算产业技术创新与育成中心 | 3D printing device, control system of 3D printing device and work method of 3D printing device |
| CN108515710A (en) * | 2018-06-21 | 2018-09-11 | 宁波市石生科技有限公司 | A kind of efficient photocuring 3D printing equipment |
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