CN203805319U - Additive fabrication device - Google Patents
Additive fabrication device Download PDFInfo
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- CN203805319U CN203805319U CN201320614393.6U CN201320614393U CN203805319U CN 203805319 U CN203805319 U CN 203805319U CN 201320614393 U CN201320614393 U CN 201320614393U CN 203805319 U CN203805319 U CN 203805319U
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- paper tinsel
- roller
- contact
- supporting
- interpolation manufacturing
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Abstract
The utility model aims to provide an additive fabrication device which is provided with an effective reversion mechanical device to reverse a foil guide roller. Therefore, on one hand, a foil guiding system comprises the flexible foil guide roller, a support system and a support layout structure, wherein the support system is arranged to support the guide roller, and comprises an end part locking element used for locking the guide roller axially; the support layout structure is used for defining support positions, enables the guide roller to bend during supporting and splicing, and is spliced with the outer surface of the guide roller in such a manner that the guide roller bent between at least two supporting positions in the same rolling direction. The flexible guide roller connected with external support is used for replacing the fixed shaft layout in the prior art, and can be adjusted to a foil moving direction more easily.
Description
Technical field
The utility model belongs to mechanical design field.Especially, the utility model relates to being controlled at effective mechanical device of the motion of adding the paper tinsel using in manufacture.The utility model provides a kind of interpolation manufacturing installation, and it has effective reversion mechanical device so that the direction of paper tinsel guide reel is reversed.
Background technology
Carry in interpolation manufacture (additive fabrication) technique liquid build material, that there is high imaging resolution (50 microns or higher in some cases) utilizing movable carrier paper tinsel to contain, need carrier foils wrinkle resistant or excessively do not stretch.In some technique, this is challenging especially, and this is because carrier foils must be fixing simultaneously mobile to allow imaging simultaneously and to be coated with at other local places that add manufacturing process at current image space.In any interpolation manufacturing process based on paper tinsel, any wrinkling or unexpected stretching of paper tinsel is all less desirable.
The interpolation manufacturing process of known use UV transparent carrier paper tinsel.For example, belong to the US6 of Fudim, liquid build material is transported to image space by 557,452 use paper tinsels.Liquid build material arrives image space imaging afterwards and is becoming solid.It is upper that solid is attached to the previous layer forming of visible object, and then paper tinsel is moved so that other liquid build material are transported to image space and forms next solid layer.This process is repeated to build the three-dimensional body of solid.Similarly, belong to 3D Systems, the US7 of Inc., 467,939 and US7,731,887 disclose the interpolation manufacturing process based on paper tinsel.In each of these techniques, in the time that liquid build material is imaged, paper tinsel keeps fixing.
Add in manufacturing process at certain, liquid build material can be a position imaging, and paper tinsel moves in other positions simultaneously.This technique (open in the WO2010/074566 that belongs to TNO) needs paper tinsel to keep motionless at image space place and corrugationless while paper tinsel is mobile at other local places.
In the interpolation manufacturing process based on paper tinsel, paper tinsel do not move in any direction at image space place, wrinkle resistant or excessively not stretch be very important.In the time that system can way moving, this difficult point is more complicated.
Therefore the mechanical device that, need to be used for allowing the corrugationless of paper tinsel the to move interpolation of (particularly can way moving system) is manufactured.
Summary of the invention
Invent a kind of effective mechanical device that is controlled at the motion of adding the paper tinsel using in manufacture.According to one side, it comprises reciprocating paper tinsel guide table (180) a kind of interpolation manufacturing installation, described reciprocating paper tinsel guide table comprises: energy source (90), it is arranged to at least a portion of the cross figure of cure curable material layer at least in part, and it is upper and contact with visible object that described curable materials layer is arranged in paper tinsel (11), and paper tinsel guidance system in the introducing side of contact-making surface (181) and the hauling-out side of described contact-making surface (181), described paper tinsel guidance system comprises: flexible paper tinsel guide reel (4), and supporting system (1), it can be according to the rotating direction (P of the paper tinsel guide reel (4) of described flexibility, Q) change and/or the curvature of the paper tinsel guide reel (4) of the described flexibility of reversing, and described supporting system is arranged to contact with the paper tinsel guide reel (4) of described flexibility, described paper tinsel guidance system is for being guided to described contact-making surface (181) by the paper tinsel (11) that comprises liquid resin layer (30) or be guided out described contact-making surface (181) to contact with described visible object (50) along the movement of visible object (50) by described paper tinsel guide table (180), described paper tinsel comprises transfer layer and structure sheaf, described transfer layer comprises polyolefin or fluoropolymer, and described structure sheaf comprises hypocrystalline thermal plastic polymer, the paper tinsel guide reel of wherein said flexibility contacts with the described structure sheaf of the described transfer layer of described paper tinsel or described paper tinsel.
In part below description, specific embodiment of the utility model is described.These and other aspects of the present utility model are set forth the embodiment by reference to hereinafter described and become clear.
Brief description of the drawings
With reference to accompanying drawing, only describe other details of the present utility model, aspect and embodiment in the mode of example.
Fig. 1 schematically shows according to the side cross-sectional view of the example of the embodiment of system of the present utility model;
Fig. 2 illustrates in greater detail the embodiment of Fig. 1 in paper tinsel guiding layout;
Fig. 3 schematically shows the three-dimensional side view of another embodiment;
Fig. 4 shows the side view of the details of the embodiment in Fig. 3;
Fig. 5 shows the details of roll assembly; And
Fig. 6 shows and is combined in the embodiment that adds the paper tinsel guidance system in manufacturing installation.
Detailed description of the invention
According to one side, the flexible form that can reverse completely by the curvature with roller replaces rigid form that bending roll is set, and particularly roll shaft can suitably be controlled at the paper tinsel using in reciprocating interpolation manufacturing process.In one embodiment, roller can be set to single-piece bar (rod).Curvature can be utilized relatively little power and change, in the time that roller surface is conditioned to limit paper tinsel and pulls power (wherein paper tinsel pulls power and limits bending curvature) in certain embodiments, curvature even can (only) be utilized by paper tinsel and is moved the power that the power of pulling provides and change.
The flexible roller layout aspect of current utility model required for protection, that be associated with external support replaces the stationary roll layout of prior art.This flexibility roller layout can be easily transferred to the paper tinsel direction of motion.And paper tinsel guidance system allows the reversion completely in the situation lower roll direction of paper tinsel corrugationless.
Be to use curved roll (referring to for example, GB1019958) for the wrinkling known solution of paper tinsel in sheet metal winding process (web winding process), its central roll is flexible and rotates around inflexibility bending axis.The protuberance of sweep points to the direction of thin slice motion.By the friction between thin slice and roller surface, thin slice leaves at the point of its initial touch roll and its between point of roller and is stretched along horizontal direction, and fold is eliminated in the region of extending along the paper tinsel direction of motion from roller.Can learn that from EP0431275 another is open, wherein show and change deflection angle to produce the mechanical device of expecting stretching, extension.But, do not expect the reversion of paper tinsel direction.In US3248031, a kind of bending roll is disclosed, it can be bending in multiple directions by published supporting system.But prior art is not also expected the multiple roll equipment that allows direction reversion in manufacturing installation adding.
Fig. 1 schematically shows according to the side cross-sectional view of the embodiment of the system 1 of aspect of the present utility model.As can be seen from the figure, outer support supporting part is with the form setting of flat surfaces 2, and this flat surfaces 2 can engage with the outer surface of roller 43.Surface 2 support bends roller 4 on the outer surface 3 of bending roll 4.Case of bending means roller flexible resilience to a certain extent, and its central roll is bent to curve under certain stress.Distortion can be flexible, and this is being favourable aspect saving energy, but can be also slightly stiff.Thereby surface 2 makes the guide reel 4 can be with respect to surperficial 2 rolling movements under case of bending, make roller can and rotating direction P, Q consistently bending between at least two bearing position A, B.On the first paper tinsel throughput direction P, roller is bent upwards at the first bearing position A place, and on contrary paper tinsel throughput direction Q, makes roller to be bent downwardly with respect to the curvature B of the first bearing position reversion.If apply the variation of paper tinsel speed on both direction P, Q, can adjust so bearing position and Support Position does not need symmetry.Therefore, supporting layout 1 allows the bending of roll shaft 4 along the path change on area supported 2.Therefore, one or more rollers 4 are set to have reversible curvature, and wherein, in the time that paper tinsel throughput direction P, Q reverse, curvature is reversed.In the reversion that the conventional in layout that should be noted that inflexibility bending roll is carried at paper tinsel, may cause fold, along the curve of direction of motion protuberance in the time that bending keeps the fixing and direction of motion with respect to protuberance reversion, may cause fold.
Fig. 2 illustrates in greater detail the embodiment of Fig. 1 in paper tinsel guiding layout.Here, supporting construction 5 is set near the extra rigid roller 6 of support bending roll 4.Supporting construction 5 also provides the latch-up structure 7 of axial locking bending roll 4.
Latch-up structure 7 can be fixing with respect to supporting construction 5, and can comprise bearing, and this bearing is arranged to the change of the axis direction being caused by its bending along with roller 4 and can reverses around the central point of this bearing.Bearing can be Self-aligning ball bearing type, and it allows the misalignment between inner ring and outer ring.Therefore, flexible roller 4 can be locked between the end latch-up structure 7 of axial lock fixed roll 4.Rigid roller 6 is formed paper tinsel induction element, and it is towards being arranged in the contact area guiding paper tinsel (not shown) of (and being explained further below) in bending roll 4 one sides and drawing paper tinsel from this contact area.In certain embodiments, induction element 6 can be the non-rotatable guiding piece that forms the edge of contact-making surface.
Fig. 3 schematically shows the three-dimensional side view of other embodiment of aspect of the present utility model.In this embodiment, multiple supporting members 20,21,22 limit the supporting contact for roller 4.Although the embodiment of Fig. 2 can be provided with passive bearing layout 1, wherein the tension force of the thin slice of bending force from roller obtains (as the layout of contact Fig. 5 is further illustrated), but preferably, the power that produces curvature (change) for example, initiatively obtains from (, pneumatic type) actuator 8.Controller 9 is set to make actuator 8 and rotating direction P, Q consistently controlled.Roller 4 is axially locked by latch-up structure 7, and has two and support contact 20,22 midway, and this supports contact midway follows passively the bending motion of roller in the time that central support activated.For the bending curvature of certain desired, can multiple actuators be set along flexible roller.
Fig. 4 illustrates in greater detail and initiatively supports layout 10.Supporting 21 provides along the supporting contact of the part circumference of roller via roller 210,211.By this way, roller 4 is embedded in supporting 21 and by the pressing force of paper tinsel 11 and is maintained at the fixed bearing position being limited by supporting contact 210,211, and the outer surface that wherein supports contact 210,211 and roller 4 engages and roller 4 is partly embedded between backing roll 210,211.Because roller 4 is embedded in supporting structure 21, initiatively support actuating device 9 and define scope and the outer retainer (outer stops) of the bending motion of roller 4.Schematically, indicate roller 4 ' at B place, position with together with mobile paper tinsel 11 ', forced the roller that the provides bending motion between position A and B to illustrate by mobile-bearing 21.
Therefore, actuator 8 is arranged to make that supporting member 21 moves to provide roller 4 between (at least) two bearing position A, B, is forced to bending motion.
Although in theory activate can by any linearity or other activate layouts provide, in a preferred embodiment, actuator 8 comprises rotatable arm 80, it rotates at least one supporting member 21 between at least two bearing position A, B.Linear pneumatic actuator 81 is coupled to rotatable arm 80, the supporting 21 of the flexible roller 4 of rotatable arm 80 bearing part ground embedding.By pneumatically actuated, arm 80 rotates between two bearing position A, B, and by embedding layout, flexible roller 4 is forced between two bearing position A, B bending, allows the rolling movement of roller 4 by supporting 21 simultaneously.In an embodiment, supporting 21 can be provided by the applicable lubrication system of ball, cylinder or fixed surface.Rigid roller structure 6 is supported in supporting construction, and supporting construction has external support to allow rolling movement.Rotatable arm 80 by the curvature of flexible roller 4 from paper tinsel motion, along P direction, the upper position A upwards time bends to the lower position B moving when downward along contrary Q direction at paper tinsel.Lower position B is schematically illustrated by a dotted line.
In an embodiment, the tension force in paper tinsel (11) and/or displacement can be for example by measure in backing roll (210,211) any one reaction force 2100 and/or backing roll 210,211 between the difference of power measure.The tension force of paper tinsel (11) and/displacement can be by controller 801 measurement result in response to the tension force in paper tinsel and/or displacement, the for example control by via actuator 81 increase or reduce curvature or by rotatable arm (80) along the suitably outside or inside movement 800 of arm direction, regulate.
Make to support 21 and be disposed on rotatable arm configuration 80 as disclosed driven roll assembly 22,20 in the embodiment of Fig. 4 can be designed as, and not by actuator 81 active drive.
Fig. 5 shows the driven roll assembly 20 of replacement.Passive meaning activated and/or in the time that roller is bending by the power that pulls of paper tinsel, assembly is complied with the bending motion of roller when central support.On the contrary, initiatively support layout and mean the unsolicited power of supply (exceeding the power of pulling), to force the bending motion of actuation roller 4.
Although the surface 2 of proper lubrication provides friction supporting, but supporting contact can also be provided by the rolling element (rolling element) 212 being arranged on locking structure 213 engaging with guide reel 4, and wherein locking structure 213 limits the bending range of roller 4 bendings.For example, end locking structure 213 is arranged on the one or both ends of bending expected range, thereby the locking element 213 fixing with respect to supporting system 20 is provided.
Roller 4 can be set to metallic rod, for example, and steel pole.In an embodiment, bar is hollow.In another embodiment, bar is solid.The rigidity of roller is enough little bending to allow in the situation that there is no too many power, thereby and enough in the situation that only having several supporting, obtains greatly again the curved shape of mitigation to limit enough large bending radius of paper tinsel.The surface 40 of roller 4 must be enough hard to be suitable as the area supported for sinking support.In the time only using several sinking support, for example, the Ball support 210,211 that axial length is several millimeters separately, roller surface 40 will have very little wearability (wear-resistant).In the time using friction supporting 2, wherein rod can supported sizable length, this surface must be still wear-resisting, but loading condition difference now: low load, but on larger surface, and contact be not roll but mobile.
Roller surface 40 can be provided with processing or layer or texture (roughness) so that the sufficiently high coefficient of friction between roller 4 and foil material 11 to be provided, and/or makes roller surface more wear-resisting.
With reference now to Fig. 6,, its show in the diagram above detailed disclosed flexible guide system 1 of combining aspect interpolation manufacturing system 100.System 100 comprises energy source 90, and it is for the presumptive area of the liquid level in abutting connection with paper tinsel 11 30 51 is solidified to obtain the solid layer 52 of visible object 50, thereby solid layer has reservation shape.On paper tinsel 11, liquid level 30 is formed limited height to contact with visible object 50.
In addition, reciprocating paper tinsel guide table 180 can be set to have the contact-making surface 181 contacting with paper tinsel 11, and in the introducing side of contact-making surface 181 and the hauling-out side of contact-making surface 181, comprise a pair of upper and lower paper tinsel guiding piece 6,60, flexible foils guide reel 4 is arranged between this pair of guiding piece, lower paper tinsel guiding piece 60 restrictions and the contact-making surface 181 paper tinsel height and position of height H 0 apart in paper tinsel height H.Fig. 6-1 illustrates the plan view of paper tinsel 11, and wherein paper tinsel 11 is conducted through contact-making surface 181 and is supported simultaneously and arranges that 1 bending roll 1 stretches along horizontal direction.In order to keep paper tinsel 11 wrinkle resistant, flexible guide roller is placed in the introducing side in region 181 as the first guide reel 4, and the second flexible guide roller 4 ' is placed in hauling-out side; Paper tinsel 11 is pulled on both at the first flexible guide roller 4,4 ', and paper tinsel 11 moves to make paper tinsel 11 to keep contacting with flexible guide roller 4,4 ' along first direction P, and wherein the first flexible guide roller and the second flexible guide roller have first curvature (A).On the direction of motion Q contrary with first direction (referring to Fig. 6-2), flexible guide roller 4,4 ' has the torsion B contrary with first curvature A.
Therefore, paper tinsel 11 can be directed to contact-making surface 181 or be directed out from contact-making surface 181, thereby allow the resin on paper tinsel to contact with visible object 50 by paper tinsel guide table 180 along moving of visible object 50, make paper tinsel 11 keep fixing with respect to visible object 50 at resin bed and visible object period of contact simultaneously.Should be noted that under this condition, paper tinsel moves along the rightabout that was previously indicated as P and Q with respect to platform 180.In an embodiment, at two ends, (A and B) locates to be prevented from the motion of paper tinsel (11).
In an embodiment, paper tinsel comprises transfer layer and structure sheaf, and transfer layer comprises polyolefin or fluoropolymer, and structure sheaf comprises hemicrystalline thermoplastic polymer.
According to the first aspect of current desired utility model, flexible multi-layered substrate at least comprises transfer layer and structure sheaf, and is therefore MULTILAYER SUBSTRATE.Flexible multi-layered substrate must have at least two layers.In certain embodiments, flexible multi-layered substrate has two layers, and in other embodiments, flexible multi-layered substrate has three or four layers.Number for flexible multi-layered substrate middle level does not have actual restriction, as long as substrate can not reduce the effect of adding manufacturing process.For example, in some cases, the interpolation of too many layer may reduce the radiation transparency of flexible multi-layered substrate, so that can not be to the enough actinic radiations of radiation curable resins transmission.Thickness similarly, the thickness of flexible multi-layered substrate do not had to actual restriction, as long as can not bring too many negative effect to the structure of three-dimensional body.In an embodiment, flexible multi-layered substrate has the thickness of at least 20 microns.In an embodiment, the thickness of flexible multi-layered substrate is from approximately 50 microns to approximately 350 microns.In an embodiment, the thickness of flexible multi-layered substrate is from approximately 20 microns to approximately 250 microns.In an embodiment, the thickness of flexible multi-layered substrate is from approximately 50 microns to approximately 250 microns.In another embodiment, the thickness of flexible multi-layered substrate is from approximately 90 microns to approximately 160 microns.
In an embodiment, each layer of flexible multi-layered substrate has 10 micron thick at least.In an embodiment, each layer of flexible multi-layered substrate has 20 micron thick at least.In an embodiment, transfer layer is from 10 to 100 micron thick, and structure sheaf is 10 to 250 micron thick.In an embodiment, transfer layer is from 10 to 250 micron thick, and structure sheaf is 30 to 200 micron thick.
Flexible multi-layered substrate comprises transfer layer and structure sheaf.Transfer layer is used for contacting radiation curable resins.Therefore, transfer layer should have the expected performance for contacting radiation curable resins, and has layer performance that expectation separates of just having solidified allowing from radiation curable resins.Structure sheaf provides structural intergrity.For example, compared with the physical property of structure sheaf and transfer layer, there is the physical property of some improvement.Transfer layer is therefore for contacting radiation curable resins, and structure sheaf is used for providing structural intergrity, together with structure sheaf is fixed to one another to transfer layer.For example, transfer layer can directly be fixed to structure sheaf, or project in the middle of can being fixed to, and wherein middle project is fixed to structure sheaf.
The transfer layer of flexible multi-layered substrate and structure sheaf and other layers (if needs) can use and fix methods known in the art such as co-extrusion, lamination and heat seal.Can use any feasible method to fix layer, need only the method with each layer that is flexible multi-layered substrate selected material compatibility and can form the flexible multi-layered substrate that carrys out components three-dimensional object via interpolation manufacturing process by allowing.The fixing means using must be realized has basic thickness uniformly and seldom or there is no a flexible multi-layered substrate of fold.Flexible multi-layered substrate should have low internal stress to avoid the warpage of flexible multi-layered substrate, and should be the accurate member with permission three-dimensional body of substantially flat.Lamination need to use adhesive or other materials to fix layer.Heat seal comprise by the layer of flexible multi-layered substrate be heated to suitable temperature then this layer is pressed into flexible multi-layered thoroughly another layer with fixed bed.
The co-extrusion method that forms flexible multi-layered substrate may need collaboration layer (tie-layer).Coordinating layer is by the thin material being fixed together by the layer of co-extrusion.For coordinating the suitable material of layer to be and the polyolefin of maleic anhydride graft, such as from
's
or Exxelor
tM.Coordinate layer should be selected as guaranteeing that enough adhesions are to prevent adding two layer layerings during manufacturing process, and on the radiation transmission performance of combined substrate without any significant impact.
For forming the laminating method of flexible multi-layered substrate, may need surface treatment with by fully fixing each other the layer of flexible multi-layered substrate.For obtain flexible multi-layered substrate layer between good adhesion, may need surface treatment to introduce reactive group on the surface of flexible multi-layered substrate, thus make flexible multi-layered substrate layer fully fixing each other.
In an embodiment, before adhesion, the layer to flexible multi-layered substrate is carried out sided corona treatment (corona treatment) or other Cement Composite Treated by Plasma.Sided corona treatment is the process for modifying surface that uses the performance of low temperature corona discharge plasma effects on surface to change.Corona plasma is to produce by sharp-pointed eletrode tip is applied to high pressure, and wherein sharp-pointed eletrode tip forms plasma in the end of sharp tip.Conventionally form corona plasma curtain (curtain of corona plasma) with the linear array of electrode.In another embodiment, before the layer of substrate is fixed to another layer of substrate, the layer to this substrate carries out chemical treatment.Can be only to of transfer layer layer or and other different layers that contact side or flexible multi-layered substrate of transfer layer and structure sheaf are carried out to surface treatment.
For the laminating method that forms flexible multi-layered substrate, must use adhesive to fix transfer layer and structure sheaf.Transfer layer and structure sheaf can use the radiation transmission performance of the flexible multi-layered substrate on combination to fix without any the adhesive of significantly impact.For the normally two part polyurethane adhesives (two component polyurethane adhesives) of suitable adhesive of lamination.But, be not limited to use polyurethane.The example of other feasible adhesives is maleic anhydride modified polyethylene, acrylic resin or bi-component epoxy (water or solvent-borne type) and other.
Conventionally, by apply the first material on the second material, to form flexible multi-layered substrate be less desirable.Coating may due to coating material solidify or dry on difference produce dimensionally or inhomogeneous surface in uniformity.In addition, coating may be poor to scraping or stroke resistance of rubbing, and compare, pass in time more likely wearing and tearing with the flexible multi-layered substrate of the structure sheaf that comprises polyolefin or fluoropolymer transfer layer and semi-crystalline thermoplastic polymer.
In addition, have been found that the flexible multi-layered substrate that comprises the transfer layer being formed by coating processes compared with comprising the MULTILAYER SUBSTRATE of polyolefin or fluoropolymer transfer layer, durability significantly reduces.At the test period of coated substrate, find that the silica gel layer (silicone layer) that applies on PET structure sheaf is not also durable, this is because the adhesion of just observing curing radiation curable resins arrive flexible multi-layered substrate after building hundreds of sky only.Therefore the co-extrusion and the laminating method that have been found that fixing transfer layer and structure sheaf provide more sane flexible multi-layered substrate.
According to the first aspect of current required utility model, flexible multi-layered substrate comprises polyolefin or fluoropolymer transfer layer.Transfer layer has following performance, and this performance allows the acceptable coating of radiation curable resins and peeling off of the firm layer solidifying.Transfer layer must not be coated on radiation curable resins in transfer layer be cured before, any substantial the drying that can not cause radiation curable resins.Transfer layer must not be adhered to the new layer solidifying so that must separate new solidify layer and the step of substrate can not present cohesion failure (cohesive failure).In addition, use transfer layer can make radiation curing resin avoid the destruction of structure sheaf, and depend on this structure sheaf and make structure sheaf avoid the destruction of radiation curing resin.Some polymer architecture layer may comprise a large amount of moisture.For example, can comprise that moisture in some polymer of structure sheaf (polyamide and polyester) may cause the strong acid producing to promote the hydrolysis of substrate in the time that some radiation curable resins solidifies.By use polyolefin or fluoropolymer transfer layer in substrate, because acid can not touch structure sheaf, thereby eliminate this reaction.
In an embodiment, transfer layer is polyolefin.In other embodiments, transfer layer is that branched low density polyethylene (LDPE), LLDPE (LLPE or LLDPE), high density polyethylene (HDPE) (HDPE), highly branched polyethylene or molecular weight are usually above 1 × 10
6the ultra-high molecular weight polyethylene (UHMWPE) of g/mol.In other embodiments, transfer layer is plastics, such as copolymer and the polymethylpentene etc. of ethene and octene.In other embodiments, transfer layer is ethene, propylene, butylene, hexene, octene, ENB, styrene polymer or its copolymer and mixture.In an embodiment, transfer layer is vinyl norbornene (ethylene-norborene) copolymer of high ethene level, such as TOPAS etc.
Due to the drying property of the especially mixing cured liquid radiation curable resins of some radiation curable resins, if it is too slow to add manufacturing process,, on the surface of fluoropolymer, radiation curable resins may dry before radiation curable resins is cured.Conventionally, the possibility that polyolefin dries resin compared with fluoropolymer is less, therefore depends on that it is preferred adding manufacturing process.
Fluoropolymer also can be depending on the transfer layer of adding the process speed of manufacturing process and be formed with use.In an embodiment, transfer layer is fluoropolymer.In certain embodiments, transfer layer is polytetrafluoroethylene (PTFE) (PTFE).In other embodiments, transfer layer be tetrafluoroethene and ethene copolymer (ETFE,
).In an embodiment, transfer layer be FEP fluorinated ethylene propylene copolymer (
fEP).In an embodiment, transfer layer is
aF, i.e. tetrafluoroethene and two (trifluoromethyl)-4,5-bis-is fluoro-1,3-dioxole (tetrafluoroethylene and2,2-bis-4,5-difluoro-1,3-dioxole).In other embodiments, transfer layer is polyvinyl fluoride (PVF), and is polyvinylidene fluoride (PVDF) in other embodiments.
In an embodiment, flexible multi-layered substrate is isotropic.Isotropism can utilize the substrate of non-orientation or biaxial orientation to realize.In an embodiment, transfer layer is non-orientation.In another embodiment, transfer layer is (in x-y plane) biaxial orientation.In other embodiments, structure sheaf is non-orientation, and in an embodiment, structure sheaf is biaxial orientation.In an embodiment, isotropic structure sheaf is formed by multiple oriented layer.In an embodiment, for example, utilize steel wool to make transfer layer produce frosting by artificial etching method, carry out surface finish with the radiation curable resins contact side to transfer layer.
According to the first aspect of current desired utility model, flexible multi-layered substrate comprises hypocrystalline thermoplastic structure layer.Structure sheaf possesses improved physical property with respect to transfer layer.For example, structure sheaf can provide improved tear resistance, temperature tolerance, mechanical performance (for example, hot strength or yield stress) or other performance.Be arranged to by substrate transmission actinic radiation if add manufacturing process or equipment, structure sheaf also must possess high radiation transmission.
Structure sheaf comprises semi-crystalline thermoplastic polymer.In an embodiment, semi-crystalline thermoplastic polymer is polyamide.In other embodiments, structure sheaf is polyamide-6, polyamide-6,6, polyamide-4,10, polyamide-4,6, polyamide-11, polyamide-12, polyamide-6T, polyamide-4T, poly-lactam and copolymer thereof.In other embodiments, structure sheaf is polyester.In other embodiments, structure sheaf is the copolymer of PETG, polybutylene terephthalate (PBT), (polypropyleneterephthalate) or its glycolide.In other embodiments, structure sheaf is PLA, polyglycolic acid, polyhydroxyalkanoate, polylactone, PEN (PEN), PBN (PBN) and copolymer thereof.In other embodiments, structure sheaf is polyethers.In other embodiments, structure sheaf is polyformaldehyde, polyalkylene oxides and copolymer thereof.In an embodiment, structure sheaf is extended by twin shaft during processing, thereby produces biaxial orientation.
In other embodiments, structure sheaf is for strengthening semi-crystalline thermoplastic polymer.This polymer can be strengthened by for example fiber or particle.In an embodiment, particle is mineral filler, such as mica, fossil, calcium carbonate, barium sulfate etc.In another embodiment, the particle that particle is sub-micron, for example nanoclay and nano silicon.The particle of sub-micron has advantages of such, and the light transmissive mode that they can not affect substrate substantially spreads.In the time that utilization adds strength polymer, the UV transmission of necessary close supervision substrate, and radioparent intensive is preferred reinforcement substantially.In an embodiment, structure sheaf comprises polyamide nano-composite.
With respect to amorphous material, adopt semi-crystalline thermoplastic polymer structure sheaf, this is because semi-crystalline thermoplastic polymer is non-friable and have an improved crack resistance compared with amorphous material.In addition, semi-crystalline thermoplastic polymer has improved crack resistance compared with amorphous material.Be full of cracks can increase the weight of under the exposure of UV light.For optimum process condition is provided in certain aspects, wish to make paper tinsel 11 on contact-making surface 181, keep as far as possible smooth.For this reason, contact-making surface 181 can be distinguishingly designed to for example have suction or clamping device with along longitudinally clamping paper tinsel; In addition, frame for movement can be set to keep the length of paper tinsel under predetermined pull.Best pulling force depends on type and the thickness of paper tinsel, but can normally about every cm paper tinsel width be 10N (being 500N for the paper tinsel width of 50cm).This pulling force can make paper tinsel 11 keep smooth on the contact area 181 with contact height H.Lengthwise pulling force enough makes paper tinsel on this whole region, keep smooth (comprising its edge), and on its edge, does not need fixture or other puller systems.
In another embodiment of the present invention, exist and conventionally have compared with the paper tinsel of the other types of low elastic modulus, wherein lengthwise pulling force possibility deficiency is so that paper tinsel keeps smooth on whole relevant range 181.There will be the trend that moves up or down or wrinkling from desired plane in the particular edge of paper tinsel 11.For this reason, flexible roller layout 1 be configured such that bending roll 4 according to paper tinsel with respect to the direction of motion of plummer 180 and bending, this has at least reduced significantly any wrinkling on the shorter region being limited by contact-making surface 181.
In this embodiment, system 100 can comprise liquid resin applicator 200, and this applicator 200 is filled with resin liquid 30 in the example shown.Alternately, resin bed can provide with the sheet form of preproduction.In an embodiment, applicator 200 is forms of one or more knurling rollers.
Energy source 90 can be arranged in the time that liquid level 30 contacts with visible object 50 in region 51 through paper tinsel 11 projection pattern.Especially, energy source 90 can be arranged to solidify at least in part (curing) in liquid level, at least a portion of cross figure.For the light or other radiation that make energy source 90 can make liquid level 30 solidify, paper tinsel 11 is preferably for this radiation substantially transparent.
In example shown embodiment, energy source 90 is being placed between paper tinsel induction element 19 in removable paper tinsel guide table 18, to expose uncured material layer by paper tinsel 11.Or energy source is movably with respect to reciprocating paper tinsel guide table 180.
Removable z platform 140 can move along z direction before new curable materials layer is provided to visible object 50.Whenever new layer solidifies and after separating, loading plate (z platform) 150 moves up together with the visible object 50 that is attached with cured layer 52 on it.
Z direction means the outside direction of in-plane from being arranged in the curable materials layer 51 paper tinsel 11.Z platform 140 can rise in the time that paper tinsel guide table 180 does not move.In this embodiment, rolling element 170 can move z platform 140.Visible object 50 is connected to z platform 140, and in each method circulation, new layer is stacked from below.For clear, the layer of curable materials illustrates with the thickness of exaggeration.
The motion independently mutually of paper tinsel 11 and paper tinsel guide table 180.In an operator scheme, in first step, paper tinsel 11 is moved the below curable materials layer is arranged on to visible object 50.Now, curable materials does not also contact with visible object 50.In second step, paper tinsel guide table 180 moves curable materials layer 51 be applied to visible object 50, exposure curable materials 51 and remove uncured material along visible object 50.In second step, paper tinsel 11 with respect to visible object 50 substantially not along moving perpendicular to z direction.In order to shorten the length direction of platform 180, exposing unit 90 is normally constrained to along plummer moving direction and for example only utilizes 2 × 2mm for the working region of about 50cm
2the approximately 6cm length that realizes of element (' pixel ', each pixel has LED+ lenticule), and every millimeter of working region width is still provided is the high-resolution of approximately 15 pixels.The details of this layout is open in PCT/NL2009/050783, and this application by reference entirety is incorporated into this.
As used herein, term " curable materials " comprises and can solidify by UV light such as, laser, ionizing radiation (including but not limited to electron beam, gamma ray or x ray) or the combination etc. of Arbitrary Term above any material of (, can be aggregated and/or crosslinked).Term " curable materials " should also be appreciated that to be to comprise the curable and composite of curable materials not, such as having mixed resin of fiber and/or filler etc.
The partly solidified such degree that is cured to that comprises, that is, in the time that the layer beyond cross figure is removed uncured material, cross figure keeps stable.Curable materials is not solidified completely, but is only cured to such degree, and material is enough stable so that this material during the step of removing the uncured material beyond cross figure can be removed together with uncured material.
Solidify cross figure completely and need certain time for exposure.Partly solidified cross figure means pattern cured to lower degree.When energy source with complete completely while solidifying the identical power operation of the power that uses, exposure can speed shorter and RM and RP technique increase.
Supporting layout described in embodiment above can comprise single flexible roller.In addition, supporting layout can comprise multiple flexible foils guide reels and multiple supporting system, especially: be placed on the first flexible foils guide reel and the first supporting system in the first side of center line, and be placed on the second flexible foils guide reel and the second supporting system in the second side of center line.
The drawings in detail providing, concrete example and only illustrative object of specific conception.From the top down build model 50 although the specific embodiment of the device 100 of describing and illustrate relates to here, instruction of the present utility model also can be applied to upright or be angle and build the device of model.In description above, with reference to the concrete example of embodiment of the present utility model, the utility model is described.But, significantly, in the case of not departing from of the present utility model wider spirit and scope as described in the appended claims, can make various amendments and change.In addition, object can have any applicable size and dimension.In addition, equipment can physically be distributed on multiple devices, but operates as individual equipment in function.And the equipment that forms specific installation in function can be integrated on single physical equipment.But other amendments, variant and replacement are also fine.Therefore, description and accompanying drawing are thought illustrative instead of restrictive, sense.Although specific embodiment describes specific optional feature in detail as further aspect of the present utility model, the implication of this description is to comprise, and specifically discloses whole combinations of these features except specializing or physically can not realizing.
Claims (17)
1. an interpolation manufacturing installation, it comprises reciprocating paper tinsel guide table (180), described reciprocating paper tinsel guide table comprises:
Energy source (90), it is arranged to at least a portion of the cross figure of cure curable material layer at least in part, and it is upper and contact with visible object that described curable materials layer is arranged in paper tinsel (11); And
Paper tinsel guidance system in the introducing side of contact-making surface (181) and the hauling-out side of described contact-making surface (181), described paper tinsel guidance system comprises:
Flexible paper tinsel guide reel (4); And
Supporting system (1), it can change and/or the curvature of the paper tinsel guide reel (4) of the described flexibility of reversing according to the rotating direction (P, Q) of the paper tinsel guide reel (4) of described flexibility, and described supporting system is arranged to contact with the paper tinsel guide reel (4) of described flexibility
Described paper tinsel guidance system is for being guided to described contact-making surface (181) by the paper tinsel (11) that comprises liquid resin layer (30) or be guided out described contact-making surface (181) to contact with described visible object (50) along the movement of visible object (50) by described paper tinsel guide table (180), described paper tinsel comprises transfer layer and structure sheaf, described transfer layer comprises polyolefin or fluoropolymer, and described structure sheaf comprises hypocrystalline thermal plastic polymer
The paper tinsel guide reel of wherein said flexibility contacts with the described structure sheaf of the described transfer layer of described paper tinsel or described paper tinsel.
2. interpolation manufacturing installation according to claim 1, wherein said paper tinsel guide table comprises a pair of upper and lower paper tinsel induction element (6,60), described lower paper tinsel induction element limit with described contact-making surface away from paper tinsel height and position (H0), the paper tinsel guide reel (4) of described flexibility is arranged between described a pair of upper and lower paper tinsel induction element, described paper tinsel guided to described contact-making surface (181) or to be guided out described contact-making surface (181).
3. interpolation manufacturing installation according to claim 2, wherein, described paper tinsel guide table (180) also comprises the upper painting system (200) for applying described liquid resin layer (30).
4. interpolation manufacturing installation according to claim 3, wherein said energy source (90) is placed with contiguous described contact-making surface (181) with the uncured material layer that exposes by described paper tinsel (11).
5. interpolation manufacturing installation according to claim 4, wherein said energy source (90) comprises multiple LED that independently can operate.
6. interpolation manufacturing installation according to claim 5, wherein said supporting system (1) comprising:
End locking member (7), it axially locks described roller (4);
Support arrangement structure (2,20,21,22), its restriction makes the bearing position of described roller (4) in supporting junction surface bending; And
The outer surface (40) of described support arrangement structure (2,20,21,22) and described roller (4) is engage described roller (4) bending mode between at least two bearing positions (A, B).
7. interpolation manufacturing installation according to claim 6, wherein said supporting system also comprises locking structure (8,213), described locking structure limits the bending range of described bending.
8. interpolation manufacturing installation according to claim 7, wherein said locking structure comprises the locking element fixing with respect to described supporting system (213).
9. interpolation manufacturing installation according to claim 8, wherein said support arrangement structure comprises one or more supporting members (20,21,22); And described locking structure comprises the actuator (8) that is connected to supporting member (21) described at least one; Described actuator (8) is arranged to mobile described supporting member (21) to provide described roller (4) to be forced to bending motion between described two bearing positions (A, B); Described actuator (8) can consistently be controlled with described rotating direction (P, Q).
10. interpolation manufacturing installation according to claim 9, wherein said actuator (8) comprises rotatable arm (80), described rotatable arm make described described at least one supporting member (21) between described two bearing positions (A, B), rotate.
11. interpolation manufacturing installations according to claim 6, wherein said support arrangement structure comprises with described paper tinsel guide reel (4) and supports the fixed bearing surface (2) contacting.
12. interpolation manufacturing installations according to claim 6, wherein said support arrangement structure comprises the rolling element (210,211) engaging with described guide reel (4).
13. interpolation manufacturing installations according to claim 6, wherein said support arrangement structure qualification is along the supporting contact site (21) of the part circumference of described roller (4).
14. interpolation manufacturing installations according to claim 6, wherein said roller surface (40) is conditioned to limit paper tinsel and pulls power, and described paper tinsel pulls power and limits bending curvature.
15. interpolation manufacturing installations according to claim 6, wherein said end locking member comprises roller bearing.
16. interpolation manufacturing installations according to claim 15, also comprise:
With the measurement mechanism that described paper tinsel (11) contacts, described measurement mechanism is used for measuring tension force and/or the displacement of described paper tinsel (11); And
With the controller that described supporting system (1) is communicated by letter with described measurement mechanism, described controller can regulate described supporting system (1) with the curvature of paper tinsel guide reel (4) in response to change described flexibility from the measurement result of described measurement mechanism.
17. interpolation manufacturing installations according to claim 16, wherein said paper tinsel (11) motion that (A, B) locates at two ends is prevented from.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614393.6U CN203805319U (en) | 2013-09-30 | 2013-09-30 | Additive fabrication device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320614393.6U CN203805319U (en) | 2013-09-30 | 2013-09-30 | Additive fabrication device |
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| CN203805319U true CN203805319U (en) | 2014-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106003712A (en) * | 2016-05-18 | 2016-10-12 | 太原科技大学 | Rolling device for additive manufacturing |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106003712A (en) * | 2016-05-18 | 2016-10-12 | 太原科技大学 | Rolling device for additive manufacturing |
| CN106003712B (en) * | 2016-05-18 | 2017-12-12 | 太原科技大学 | A kind of rolling device for increasing material manufacturing |
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