US20060078638A1 - Stereolithographic apparatus - Google Patents

Stereolithographic apparatus Download PDF

Info

Publication number
US20060078638A1
US20060078638A1 US10961976 US96197604A US2006078638A1 US 20060078638 A1 US20060078638 A1 US 20060078638A1 US 10961976 US10961976 US 10961976 US 96197604 A US96197604 A US 96197604A US 2006078638 A1 US2006078638 A1 US 2006078638A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
vat
elevator
resin
system
apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10961976
Inventor
Scott Holmboe
Gary Reynolds
Matthew Stonesmith
Charles Hull
Abraham Reichental
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3D Systems Inc
Original Assignee
3D Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10Processes of additive manufacturing
    • B29C64/106Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/124Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B29C64/129Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
    • B29C64/135Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00Auxiliary operations or equipment, e.g. for material handling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/753Medical equipment; Accessories therefor
    • B29L2031/7532Artificial members, protheses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00Materials specially adapted for additive manufacturing

Abstract

An improved stereolithography apparatus for forming three-dimensional objects using multiple chambered resin vats and a quick disconnect mounting system to permit concurrent use of multiple photopolymer build materials and easy change over of resin vats is disclosed. The apparatus permits easy change over from multiple chambered vat use to single chamber vat use and vice versa or change over between multiple chambered vats.

Description

    FIELD OF INVENTION
  • [0001]
    The present invention is directed to a stereolithographic apparatus for forming three-dimensional objects on a layer-by-layer basis and, more particularly, is directed to an apparatus having multiple resin vats or containers to permit more than one part location to be utilized during the building of stereolithographic objects and to permit easy and rapid change over of multiple resin vats or containers to a single vat or container, or between multiple vats by using an improved mounting system.
  • BACKGROUND OF THE INVENTION
  • [0002]
    In recent years, many different techniques for the fast production of three-dimensional models have been developed for industrial use. These are sometimes referred to as rapid prototyping and manufacturing (“RP&M”) techniques. In general, rapid prototyping and manufacturing techniques build three-dimensional objects layer by layer from a working medium utilizing a sliced data set representing cross-sections of the object to be formed. Typically, an object representation is initially provided by a Computer Aided Design (CAD) system.
  • [0003]
    Stereolithography, presently the most common RP&M technique, may be defined as a technique for the automated fabrication of three-dimensional objects from a fluid-like material utilizing selective exposure of layers of the material at a working surface to solidify and adhere successive layers of the object (i.e. laminae). In stereolithography, data representing the three-dimensional object is input as, or converted into, two-dimensional layer data representing cross-sections of the object. Layers of material are successively formed and selectively transformed or solidified (i.e. cured) using a computer controlled laser beam of ultraviolet light (UV) into successive laminae according to the two-dimensional layer data. During transformation, the successive laminae are bonded to previously formed laminae to allow integral formation of the three-dimensional object. More recent designs have employed the use of visible light to initiate the polymerization reaction to cure the photopolymer build material that is commonly referred to as resin.
  • [0004]
    Stereolithography represents an unprecedented way to quickly make complex or simple parts without tooling. Since this technology depends on using a computer to generate its cross-sectional patterns, there is a natural data link to CAD/CAM. Such systems have encountered and had to overcome difficulties relating to shrinkage, curl and other distortions, as well as resolution, accuracy, and difficulties in producing certain object shapes.
  • [0005]
    Although stereolithography has shown itself to be an effective technique for forming three-dimensional objects, various improvements addressing the technology's difficulties and expanding the potential manufacturing applications have been desired for some time. Many improvements have addressed the aforementioned difficulties and have been made to object accuracy, speed and appearance of the build object over the years. A recent area of expansion of stereolithographic applications has been into the area of hearing aid shell manufacturing where digital data of a patient's ear is used to create a customized hearing aid shell. This is done on a large scale with as many as 160 hearing aid shells being manufactured in a single build using a stereolithography system. Many patients have two hearing aid shells made, one for each ear. Other patients require only a single hearing aid shell. Regardless, a convention has arisen among some manufacturers to color code the hearing aid shells according to which ear in which the shell is to be used. With the advent of biocompatible colored resins or build materials, a need has arisen for the ability to manufacture in a single build cycle hearing aid shells for both the left and the right ears. This requires the use of at least two separate vats within the context of the traditional stereolithography systems. Therefore there is the need for a stereolithography system to accommodate a second vat or resin material container so that hearing aid shells of two different colors can be manufactured in a single build cycle. Further, there is a need to permit easy change over of vats in a stereolithographic system between one and two vats or simply to be able to replace an existing vat.
  • [0006]
    These problems are solved in the design of the present invention.
  • SUMMARY OF THE INVENTION
  • [0007]
    It is an aspect of the present invention that a stereolithography apparatus is provided which permits the concurrent use of multiple chambered resin vats or photopolymer material containers during a single build cycle.
  • [0008]
    It is another aspect of the present invention that an improved design for securing the resin vats to the stereolithography system is provided to permit easy change over of the resin vats or photopolymer material containers from a single chambered vat to multiple chambered vats, or between multiple chambered vats.
  • [0009]
    It is a feature of the present invention that multiple resin vats or photopolymer material containers can be used concurrently during a single build cycle to create three-dimensional parts in a stereolithography system.
  • [0010]
    It is another feature of the present invention that the mounting system for the elevator legs in the resin vats or photopolymer material containers employ an easy release locking system.
  • [0011]
    It is yet another feature of the present invention that the resin vats or photopolymer material containers are removable from the stereolithography system with the elevator legs and support platforms.
  • [0012]
    It is still another feature of the present invention that the resin level within the multiple chambered resin vats or photopolymer containers is at the same level in each chamber during operation.
  • [0013]
    It is an advantage of the present invention that multiple resins, including differently colored resins, can be utilized concurrently in a stereolithography system to produce three-dimensional objects with different physical properties.
  • [0014]
    It is another advantage of the present invention that a simple resin vat and elevator leg mounting system is employed to permit easy and fast changing of resin vats or material containers and changing from single chambered vat operation to multiple chambered vat operation or vice versa.
  • [0015]
    It is still another advantage of the present invention that no cleaning of the stereolithography system parts is required between change over of vats.
  • [0016]
    These and other aspects, features, and advantages are obtained by the present invention through the use of a multiple chambered resin vat and a quick disconnect mounting system to permit concurrent use of multiple photopolymer build materials and easy change over of resin vats in a stereolithography system.
  • BRIEF DESCRIPTION OF THE DRAWING
  • [0017]
    These and other aspects, features and advantages of the invention will become apparent upon consideration of the following detailed disclosure of the invention, especially when taken in conjunction with the following drawings wherein:
  • [0018]
    FIG. 1 is a front perspective view of a stereolithography system;
  • [0019]
    FIG. 2 is a diagrammatic illustration of the operation of a stereolithography system;
  • [0020]
    FIG. 3 is a partial perspective view of the multiple resin vat configuration of the frame and supporting structure of a stereolithography system of the present invention;
  • [0021]
    FIG. 4 is a top plan view of the stereolithography system having two resin vats mounted for concurrent operation;
  • [0022]
    FIG. 5 is a side perspective view of the quick disconnect elevator arms of a stereolithography system of the present invention;
  • [0023]
    FIG. 6 is a front elevational view of the quick disconnect elevator arms and the locking device moved between an unlocked position shown in solid lines and a locked position shown in dotted lines of a stereolithography system of the present invention;
  • [0024]
    FIG. 7 is a side elevational view of the quick disconnect elevator arms and the locking device moved in a locked position of a stereolithography system of the present invention;
  • [0025]
    FIG. 8 is a side perspective view of a two resin vat system showing the separate drains for each vat of a stereolithography system of the present invention; and
  • [0026]
    FIG. 9 is a partial perspective view of the single resin vat configuration of the frame and supporting structure of a stereolithography system of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0027]
    Stereolithography typically involves the layer by layer build-up of articles from a vat or container of liquid monomer. Stereolithography parts are preferably built on structures known as supports rather than directly on an elevator platform that moves the build object or part up and down as successive layers or laminae are formed during the stereolithography process. The vat of liquid photopolymer material provides a fresh material to create new layers as the object is built.
  • [0028]
    A typical stereolithography system is represented by the numeral 10 shown in FIG. 1. Such a system is offered commercially by 3D Systems, Inc. of Valencia, Calif. as the Viper Si2™ SLA® system. The system 10 includes a computer console 11 with a control computer, computer terminal, and monitor. The system 10 also has a laser housing 12 that includes a laser, mirrors, crystal and other components of the laser system of the type described in U.S. Pat. No. 6,157,663 to Wu et al. and assigned to the assignee of the present invention. The laser system projects a beam onto the surface of the photocurable liquid or resin material in the vat to cure or solidify the liquid in the cross section or layer being formed. This photocuring operation takes place in an enclosed process chamber 14 and the part with its underlying support structure is formed on a support platform 15 that is moveable up and down in the vat of material by an elevator assembly.
  • [0029]
    Looking now at FIG. 2, there is shown in a diagrammatic illustration a stereolithographic system that makes solid objects by successively creating thin layers of a solidified material one on top of the other by use of a programmable moveable spot beam of light shining on the surface of the UV curable liquid. FIG. 2 shows a laser 20 projecting a laser beam 21 onto the surface of the resin 19 to form the three dimensional object 17 that is supported on the support platform 15. The support platform 15 is raised and lowered by means of an elevator 18 which extends down into the vat 16 that contains the photocurable resin 19. Data is sent to the stereolithography system from a CAD station indicated by the numeral 22 that converts the CAD data to a suitable digital stereolithographic layer data format and feeds it to a computer control system 24 where the object data is manipulated to optimize the data and provide output vectors. The stereolithographic layer data format or STL file is a tessellated object description consisting of the X, Y, and Z coordinates of the three vertices of each surface polygon, as well as an index that describes the orientation of the surface normal. The surface polygons preferably are triangles. The manipulated data will reduce stress, curl and distortion, and increase resolution, strength, accuracy, speed and economy of reproduction, even for rather difficult and complex object shapes. The interfacing computer control system 24 generates layer data by slicing, varying layer thickness, rounding polygon vertices, filling, scaling, cross-hatching, offsetting vectors, ordering of vectors, and generating flat skins, near-flat skins, up-facing and down-facing skins.
  • [0030]
    The vector data and parameters from the computer control system 24 are directed to a controller subsystem for operating the system stereolithographic laser, mirrors, elevator and the like which permit the solid individual laminae that represent cross-sections of the build object or part to be generated and the laminae to be successfully combined to form the three-dimensional part. The part is generated by the application of an appropriate form of energy stimulation as a graphic pattern according to these vector data and parameters at the fluid medium surface to form the thin individual layers or laminae. Each solid layer or individual lamina represents an adjacent cross-section of the three-dimensional object to be produced. Successive adjacent layers or laminae are superimposed as they are formed to generate the three-dimensional object or part.
  • [0031]
    The programmable source of energy stimulation, in this instance the ultraviolet (“UV”) light, is provided by a laser. Alternatively, new systems employing visible light such as DLP, systems may be used to cure the photocurable resin 19. Photomasks also can be utilized in either approach to selectively apply the energy stimulation, which may be any other appropriate form of energy to stimulate change from a liquid to a solid such as electron beam particle bombardment or application of chemically reactive materials. Operation of the SLA system 10 of FIG. 1 and its diagrammatic illustration in FIG. 2 is described in greater detail in U.S. Pat. No. 5,184,307 to Hull et al. and assigned to the assignee of the present invention.
  • [0032]
    Turning now to FIG. 3, there is shown in a partial front perspective view the interior frame of an SLA system with its elevator and Z-stage assembly 25 holding a dual vat or resin container 31. The elevator and Z-stage assembly indicated generally by the numeral 25 has frame 26 that supports it and includes a machined aluminum vat rim 28 that encloses all four sides of the frame and to which a rim support 29 is bolted. Rim support 29 is also fastened to the frame (not shown) of the system 10. Rim support 29 has a bottom onto which the vat rim 28 sealingly seats. Vat rim 28 is kinematically mounted on three balls (not shown) to the frame 26.
  • [0033]
    A recoater device 30 is movably mounted onto the frame for movement front-to-back along the vat rim 28. However, in the dual vat configuration the recoater device is not employed. A recoater device 30 is employed where a single vat is utilized in the stereolithography system 10 and its operation is described in greater detail in U.S. Pat. No. 5,902,537 issued to Almquist et al. and assigned to the assignee of the present invention. An advantage of the present invention is that cleaning of the stereolithography system and especially the recoater device is not required during change over or exchange of multiple chambered vats to a single chamber vat.
  • [0034]
    The dual vat 31 illustrated in FIG. 3 has handles 34 (only one of which is shown) on both sides mounted to flanges 33, fastened to the side of the vat 31. A vat divider 32, best seen in FIGS. 4 and 8, separates the two chambers 31A and 31B of the vat (see briefly FIG. 4). Vat 31 with its two chambers thus can hold two different resins, such as a resin colored red or blue, or different pigmented or clear resins. A resin refill reservoir 35 is connected in fluid flow communication with one of the two vats in dual vat 31. In this configuration it is connected in fluid flow communication with vat chamber 31A that is known as the slave vat chamber as opposed to the master vat chamber 31B. Manually actuated ball valves 36, best seen in FIGS. 3 and 8, connect to the bottom of slave vat chamber 31A and master vat chamber 31B to permit resin to be drained through drain holes 37 when desired. The floors of vat chambers 31A and 31B slope downwardly toward the drain holes 37 to facilitate draining resin from the vat chambers. The manually actuated valves 36 are opened using vat drain handles 38.
  • [0035]
    As seen in FIG. 8, there is a baffle 78 that is used to contain liquid resin during the vat leveling operation. The baffle 78 contains a single chamber and is open bottomed on its left side in master vat chamber 31B, but is closed on the bottom in slave vat chamber 31A. The slave vat chamber 31A also has an open bottomed baffle 79. Within baffle 78 a diode beam from leveling diode spy sensor assembly 42 and from laser leveling diode 93 senses the height of the resin in master vat chamber 31B. Sensor 93 moves the master vat chamber 31B to the correct height. Spy sensor assembly 42 uses the sensing of sensor 93 as a reference, records the height and provides a comparative value for laser diode assembly 41 to adjust the height of resin in slave vat chamber 31A to the same height as the resin in master vat chamber 31B. Sensor assemblies 41 and 42 are employed to ensure the level of resin in both vat chambers 31A and 31B are exactly the same height. Both laser diode sensor assemblies 41 and 42 employ an OMRON ZXLD30 optical sensor 43 to sense the height of the resin in slave vat chamber 31A and the master vat chamber 31B as described. Sensor assembly 41 senses the height of the resin in slave vat 31A inside baffled 79. A baffle is used to prevent gas bubbles in the vat chambers from interfering with obtaining exact resin-height readings. Sensor assembly 41 compares the sensing from its sensor 43 with the signal from spy sensor assembly 42 to either add more resin from resin refill reservoir 35 or pump resin back into resin refill reservoir 35, as appropriate.
  • [0036]
    Dual vat 31 is raised up and down by a vat hoist (not shown) under the vat and which can be used to lower the vat to a fully lowered position when removal is needed in a manner to be described with respect to disconnection of the elevator legs 48.
  • [0037]
    Also seen in FIG. 3, attached to the vat rim is a ceramic laser beam rest stop 39 that permits the laser beam for the stereolithography system 10 to rest on a target that cannot be harmed when not imaging on the surface of the resin 19. A rim support 40 is shown adjacent ceramic laser beam rest 39 that helps fasten the rim support 29 to the vat rim 28.
  • [0038]
    The elevator, indicated generally by the numeral 57, is best seen in FIGS. 5-7. For the dual vat configuration with dual vat or split vat 31, a pair of mounting brackets 45 are secured via four bolts through bolt holes 47 (see briefly FIG. 5) into mounting block 44 of the Z-stage saddle 66. Elevator legs 48 are connected to the mounting plates 45 in a manner to be described hereafter. Each platform 62 (see briefly FIG. 4) in the split vat 31 is supported by a pair of elevator legs 48 that are fastened to a welded stainless steel elevator frame 50. Frame 50 has a cross bar 51 connecting its opposing sides allowing the platform 62 to rest on top of it.
  • [0039]
    A vat quick disconnect locking lever 46, best seen in FIGS. 5 and 6, is pivotally or rotatably mounted to each mounting bracket 45 via a locking lever pivot screw 52. Lever 46 has a handle 53 and on its opposing end a rolling pin 54 fastened to the locking lever 46 by a mounting screw 55. An elevator leg locking bar 49 connects the two opposing elevator legs 48 for each elevator assembly supporting each elevator platform 62. As best seen in FIG. 6, the locking lever 46 is moveable between a locked position, shown in solid lines and an unlocked position shown in dotted lines. In the locked position, the rolling pin 54 is pressed in cam-like fashion against the locking bar 49 to secure the elevator in place. In the unlocked position the rolling pin 54 is pivoted up into the rolling pin recess 56. In the locked position, the locking lever 46 is stopped in its fully locked position by stop pin 58. As best seen in FIG. 7, the platform elevator legs 48 (only one of which is shown) fit over a pressed in pin or dowel 59 that extends about 2.5 inches from both sides of mounting plates 45. Elevator leg mounting groove 60 for each elevator leg 48 then fits over and hangs on pin 59. If locking lever 46 is not in the locked position, the elevator legs 48 are free to swing on pins 59. However, when locking lever 46 is in the locked position, rolling pin 54 presses against the locking bar 49 to hold the elevator legs 48 and the elevator assembly 57 and platform 62 firmly in position. A spring loaded ball detent 63 in the outer side of each mounting plate 45 pushes the outer elevator leg 48 of each pair outwardly to bias the elevator assembly 57 so it repeatably will be seated with the opposing elevator leg pulled snugly against mounting plate 45. Also as seen in FIG. 7, an elevator frame mounting pin 61 connects elevator frame 50 to the bottom of each elevator leg 48.
  • [0040]
    Returning now to FIG. 4, there is also shown in connection with the resin refill reservoir 35 a refill reservoir pump 64 that is driven by a pump electric motor 65. This motor turns a peristaltic pump or positive displacement pump that pumps resin in both directions between the reservoir 35 and the slave vat chamber 31A. As described previously, two sensors 42 and 41 match the height of the resin in the slave vat chamber 31A to the height of the resin in the master vat 31B by pumping resin into or removing it from slave vat chamber 31B. This is necessary because in the dual vat 31 configuration both vats must have the exact same level of resin. Resin recoating of the three dimensional part 17 being built in the dual vat 31 occurs by the deep dip process whereby after exposing and solidifying a layer of the object, the elevator assembly 57 is lowered with the platform 62 by the z-stage stepper motor 68 so that fresh resin flows over the top of the just exposed layer. The z-stage stepper motor 68 then raises the platform 62 with the recoated part on it to a height one layer thickness beneath the surface of the resin 19 in vat 31 and the laser beam than repeats the imaging to from the next layer.
  • [0041]
    As seen FIG. 4, the z-stage includes a saddle 66 and a z-stage stepper motor 68 mounted to a stepper motor mount 69 that raises and lowers the elevator assembly 57. The stepper motor 68 is connected to a ball screw that is connected to the z-stage saddle 66. The z-stage moves up and down on linear bearings 72 that ride in two vertical tracks (not shown). The stepper motor mount 69 is connected to a z-stage base 70 that is connected to the stereolithography system frame by a connecting bar 71. A z-stage flag 74 is sensed by an upper limit switch 75 to limit raising the height of the z-stage to its maximum. A corresponding lower limit switch and flag assembly 95 are shown briefly in FIG. 3.
  • [0042]
    When a single vat is desired to be utilized, the locking levers 46 are moved to the unlocked position and the elevator arms 48 are removed from the mounting plate pins 59 by sliding the arms 48 off of the pins 59 and out of the grooves 60 to permit the elevator assembly 57 and the platform 62 in each vat chamber 31A and chamber 31B to be lowered into the vat. The vat hoist (not shown) then lowers the dual vat 31 and a cart is used to remove the dual vat 31 from the stereolithography system 10. A single chambered vat 80 is then moved into place by means of a cart rolling the vat into the frame 26. As seen in FIG. 9, the two outer mounting plate pins 59 on mounting plates 45 are employed with the single vat elevator legs locking bar 84 to lock the elevator legs 82 into place in the grooves 60 that are machined into the elevator legs 82 in the same manner as with the dual vat 31. The elevator legs 82 are similarly connected to a frame 50 that supports a support platform 81 on which three dimensional parts are built. The recoater blade 30 can then optionally be employed to recoat a fresh layer of resin over a just formed layer of the three dimensional part, if desired. Alternatively, the deep dip method can be employed. The laser diode leveler 93 is utilized in conjunction with baffle 94 to sense the level of liquid in the single chambered vat 80 and provide additional resin as required from the resin refill reservoir 35. This leveling operation is described in greater detail in U.S. Pat. No. 5,258,146 to Almquist et al., assigned to the assignee of the present invention.
  • [0043]
    Any suitable fluid medium capable of solidification in response to the application of an appropriate form of energy stimulation may be employed in the practice of the present invention. Many liquid state chemicals are known which can be induced to change to solid state polymer plastic by irradiation with ultraviolet light or other forms of stimulation such as electron beams, visible or invisible light, or reactive chemicals applied by ink jet or via a suitable mask. Suitable photopolymers that may be employed in the practice of the present invention include any commercially available photopolymer manufactured by 3D Systems, Inc. of Valencia, Calif. These include, but are not limited to, SI10, SI20, SI 40, and SI 50 resins for use in any 3D Systems' commercially available SLA® system. Especially suitable for manufacturing hearing aid shells are the 7400, 7500, 7100 and 7300 series resins available from Dreve-Otoplastik GmbH of Unna, Germany. When manufacturing hearing aid shells the resin vats 31 or 80 are shallow, having a depth of about 2 to 3 inches.
  • [0044]
    The present invention can be practiced on any stereolithographic equipment, but has been discussed in the context of a Viper si2™ SLA® system available commercially from 3D Systems, Inc., the assignee of the present invention.
  • [0045]
    While the invention has been described above with references to specific embodiments thereof, it is apparent that many changes, modifications and variations in the materials, arrangements of parts and steps can be made without departing from the inventive concept disclosed herein. For example, the elevator arm quick release apparatus and method of the present invention can equally well be applied to permit replacement of individual ones of the chambers in dual vat 31 by having the dual vat chambers be separately formed in two separate and distinct containers each supported by their own elevator assembly. Then should just one vat need replacement or a different color be desired, the existing one of the two vat chambers can be released and removed and then replaced with a new vat chamber. Further, while only a dual chambered approach has been illustrated it is possible to employ a vat having more than two chambers or more than two separate and distinct chambers each supported by their own elevator assembly and individually removable. Accordingly, the spirit and broad scope of the appended claims are intended to embrace all such changes, modifications and variations that may occur to one of skill in the art upon a reading of the disclosure. All patent applications, patents and other publications cited herein are incorporated by reference in their entirety.

Claims (20)

  1. 1. An apparatus for forming three dimensional objects from solidifiable liquid material in response to energy applied to a working surface of the material comprising:
    a. a frame;
    b. a source of energy mounted to the frame for applying energy to the solidifiable liquid material;
    c. a container for holding the solidifiable liquid material mounted to the frame, the container having multiple chambers for holding separate solidifiable liquid materials;
    d. a data source to supply data representative of the three-dimensional objects to the apparatus;
    e. a data processing apparatus connected to the apparatus to receive the data representative of the three-dimensional objects and convert the data into layer data format that is processed to form layer data used by the apparatus to control the source of energy to apply energy to the solidifiable liquid material to stimulate a change from a liquid to a solid layer by layer to form the three dimensional object;
    f. a support platform on which the three dimensional objects are formed for each chamber in the container connected to the apparatus and movably supported within each chamber; and
    g. elevator assembly supporting each support platform in each chamber for raising and lowering the support platform in each chamber.
  2. 2. The apparatus according the claim 1 further comprising at least two chambers in the container for holding the solidifiable liquid material.
  3. 3. The apparatus according the claim 1 wherein the elevator assembly comprises a supporting frame connected to elevator legs, the legs being removably fastened to the apparatus.
  4. 4. The apparatus according to claim 3 wherein the elevator legs are removably fastened to a mounting plate connected to the frame and associated with each chamber, the mounting plate having a locking lever pivotally mounted thereto movable between a locked position contacting and holding the elevator assembly and an unlocked position in which the elevator assembly can be removed from the mounting plate.
  5. 5. The apparatus according to claim 4 wherein the elevator assembly further comprises a locking bar connecting two spaced apart elevator legs, the elevator legs extending vertically upwardly from the elevator assembly supporting frame.
  6. 6. The apparatus according to claim 5 wherein each mounting plate has support pins extending horizontally outwardly therefrom.
  7. 7. The apparatus according to claim 6 wherein the elevator legs for each elevator assembly further have a recess into which the mounting plate support pins fit to provide movable hanging support until the locking lever is moved to the locked position and the elevator legs are securely fastened in unmoving fashion.
  8. 8. The apparatus according to claim 7 further comprising the multiple chambers being individually removable from the apparatus.
  9. 9. The apparatus according to claim 8 further comprising the source of energy selectively supplying UV or visible light to the solidifiable liquid material.
  10. 10. The apparatus according to claim 9 further comprising the source of energy being a UV laser or a visible light digital light projector.
  11. 11. The apparatus according to claim 9 further comprising the solidifiable liquid material being a photopolymer resin.
  12. 12. The apparatus according to claim 2 further comprising each chamber holding a different solidifiable liquid material.
  13. 13. An apparatus for forming three dimensional objects from solidifiable liquid material layer by layer in response to energy applied to a working surface of the material, the improvement comprising multiple solidifiable liquid material containing chambers for concurrently forming three dimensional objects, the chambers being removably fastened to the apparatus and releasable from the apparatus by at least one quick release lever to permit individual or multiple chamber removal and replacement.
  14. 14. The apparatus according the claim 13 further comprising support platforms within each chamber on which the three dimensional objects are formed, the support platforms being supported by elevatable elevator assemblies removably connected to the apparatus and releasable by the at least one quick release lever.
  15. 15. The apparatus according the claim 14 further comprising each elevator assembly having at least one elevator leg removably connected to the apparatus via a mounting plate to which the at least one locking lever is pivotally mounted, the at least one locking lever being moveable between a locked position and an unlocked position in which the elevator assembly can be removed from the apparatus to permit individual or multiple chamber removal.
  16. 16. The apparatus according the claim 15 further comprising each elevator assembly having a locking bar connecting two spaced apart elevator legs, the elevator legs extending vertically upwardly from an elevator assembly supporting frame, the locking bar further being contacted by the locking lever in the locked position to retain the elevator assembly in position.
  17. 17. The apparatus according to claim 16 further comprising each mounting plate being associated with a chamber and having support pins extending horizontally therefrom and onto which the elevator legs hangingly are supported in movable fashion until the locking lever is moved to the locked position and the elevator legs are securely fastened in unmoving fashion.
  18. 18. The apparatus according to claim 17 further comprising the energy being UV light or visible light.
  19. 19. The apparatus according to claim 18 further comprising the solidifiable liquid material being a photopolymer resin.
  20. 20. The apparatus according the claim 19 further comprising each chamber holding a different photopolymer resin.
US10961976 2004-10-08 2004-10-08 Stereolithographic apparatus Abandoned US20060078638A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10961976 US20060078638A1 (en) 2004-10-08 2004-10-08 Stereolithographic apparatus

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US10961976 US20060078638A1 (en) 2004-10-08 2004-10-08 Stereolithographic apparatus
EP20060076455 EP1719608A3 (en) 2004-10-08 2005-09-27 Improved sterolitographic apparatus
EP20050255998 EP1645402B1 (en) 2004-10-08 2005-09-27 Improved stereolithographic apparatus
JP2005296655A JP4745783B2 (en) 2004-10-08 2005-10-11 Improved stereo lithography apparatus
US12124591 US7785093B2 (en) 2004-10-08 2008-05-21 Stereolithographic apparatus

Publications (1)

Publication Number Publication Date
US20060078638A1 true true US20060078638A1 (en) 2006-04-13

Family

ID=35529649

Family Applications (2)

Application Number Title Priority Date Filing Date
US10961976 Abandoned US20060078638A1 (en) 2004-10-08 2004-10-08 Stereolithographic apparatus
US12124591 Active 2024-10-09 US7785093B2 (en) 2004-10-08 2008-05-21 Stereolithographic apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12124591 Active 2024-10-09 US7785093B2 (en) 2004-10-08 2008-05-21 Stereolithographic apparatus

Country Status (3)

Country Link
US (2) US20060078638A1 (en)
EP (2) EP1719608A3 (en)
JP (1) JP4745783B2 (en)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050248062A1 (en) * 2004-05-10 2005-11-10 Alexandr Shkolnik Process for the production of a three-dimensional object with resolution improvement by "pixel-shift"
US20060192312A1 (en) * 2005-02-28 2006-08-31 3D Systems, Inc. Multiple vat leveling system
US20070074659A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20070075458A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20070075460A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20070075459A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20070077323A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20080021586A1 (en) * 2006-07-19 2008-01-24 Volker Schillen Method and device for producing a three-dimensional object, and computer and data carrier useful therefor
US20080217818A1 (en) * 2004-10-08 2008-09-11 Holmboe Scott B Stereolithographic Apparatus
US20090061161A1 (en) * 2007-08-27 2009-03-05 Lynn Sheehan Laser patterning of a cross-linked polymer
US20090130449A1 (en) * 2007-10-26 2009-05-21 Envisiontec Gmbh Process and freeform fabrication system for producing a three-dimensional object
US20090311489A1 (en) * 2007-08-27 2009-12-17 Lynn Sheehan Laser patterning of a carbon nanotube layer
US7783371B2 (en) 2006-04-28 2010-08-24 Envisiontec Gmbh Device and method for producing a three-dimensional object by means of mask exposure
US7845930B2 (en) 2004-05-07 2010-12-07 Envisiontec Gmbh Process for the production of a three-dimensional object with an improved separation of hardened material layers from a construction plane
US7894921B2 (en) 2006-04-28 2011-02-22 Envisiontec Gmbh Device and method for producing a three-dimensional object by means of mask exposure
US7892474B2 (en) 2006-11-15 2011-02-22 Envisiontec Gmbh Continuous generative process for producing a three-dimensional object
US20110077760A1 (en) * 2009-09-28 2011-03-31 Siemens Medical Instruments Pte. Ltd. Method of producing a housing shell or ear mold to be worn in the ear
US20110089610A1 (en) * 2009-10-19 2011-04-21 Global Filtration Systems Resin Solidification Substrate and Assembly
USRE43955E1 (en) 2004-05-10 2013-02-05 Envisiontec Gmbh Process for the production of a three-dimensional object with resolution improvement by pixel-shift
US8465689B2 (en) 2007-01-17 2013-06-18 3D Systems, Inc. Elevator and method for tilting solid image build platform for reducing air entrainment and for build release
US8678805B2 (en) 2008-12-22 2014-03-25 Dsm Ip Assets Bv System and method for layerwise production of a tangible object
US8777602B2 (en) 2008-12-22 2014-07-15 Nederlandse Organisatie Voor Tobgepast-Natuurwetenschappelijk Onderzoek TNO Method and apparatus for layerwise production of a 3D object
US8845316B2 (en) 2007-07-04 2014-09-30 Envisiontec Gmbh Process and device for producing a three-dimensional object
US8905739B2 (en) 2008-12-22 2014-12-09 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Method and apparatus for layerwise production of a 3D object
US20150273520A1 (en) * 2014-03-26 2015-10-01 Seiko Epson Corporation Method of manufacturing three-dimensional structure and three-dimensional structure
US20160059494A1 (en) * 2014-08-28 2016-03-03 Roland Dg Corporation Three-dimensional printing apparatus
CN106182783A (en) * 2016-08-31 2016-12-07 广州黑格智能科技有限公司 3D printing machine
WO2016198291A1 (en) 2015-06-09 2016-12-15 Politecnico Di Milano A device for direct additive manufacturing by means of extrusion of metal powders and ceramic materials on a parallel kinematic table
WO2016205020A1 (en) * 2015-06-19 2016-12-22 Elwha Llc Printing systems and related methods
US9527244B2 (en) 2014-02-10 2016-12-27 Global Filtration Systems Apparatus and method for forming three-dimensional objects from solidifiable paste

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070075461A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20080170112A1 (en) * 2007-01-17 2008-07-17 Hull Charles W Build pad, solid image build, and method for building build supports
DE112008000475T5 (en) * 2007-02-23 2010-07-08 The Ex One Company Interchangeable container for manufacturing three-dimensional printer
DE102007010624B4 (en) 2007-03-02 2009-04-30 Deltamed Gmbh Device for layerwise generative production of three-dimensional molded articles, methods of making these moldings and these molded parts
DE102008045188A1 (en) * 2008-08-30 2010-03-04 Fachhochschule Kiel Work-piece for learning handling of tools, has colored embedding material and object embedded in embedded material, where embedded material has layer, which has color gradients processed by surface of layer in direction of embedded object
US8048359B2 (en) 2008-10-20 2011-11-01 3D Systems, Inc. Compensation of actinic radiation intensity profiles for three-dimensional modelers
US8666142B2 (en) * 2008-11-18 2014-03-04 Global Filtration Systems System and method for manufacturing
DE102010020416A1 (en) * 2010-05-12 2011-11-17 Eos Gmbh Electro Optical Systems Space-changing means, and an apparatus for producing a three-dimensional object space with a changing means
EP2670572A4 (en) 2011-01-31 2017-12-13 Global Filtration Systems Dba Gulf Filtration Systems Inc Method and apparatus for making three-dimensional objects from multiple solidifiable materials
US8691476B2 (en) 2011-12-16 2014-04-08 Taiwan Semiconductor Manufacturing Company, Ltd. EUV mask and method for forming the same
WO2013177620A1 (en) * 2012-05-29 2013-12-05 Zydex Pty Ltd Device for making an object and a method for making an object
GB201317974D0 (en) * 2013-09-19 2013-11-27 Materialise Nv System and method for calibrating a laser scanning system
US9524357B1 (en) 2013-10-22 2016-12-20 Simplify3D LLC Systems, methods and apparatus for generating and modifying support structures
JP2015136795A (en) * 2014-01-20 2015-07-30 ローランドディー.ジー.株式会社 Three-dimensional modeling apparatus and three-dimensional modeling method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652193A (en) * 1969-11-06 1972-03-28 Jaroslav F Adamik Slush molding machine
US5182715A (en) * 1989-10-27 1993-01-26 3D Systems, Inc. Rapid and accurate production of stereolighographic parts
US5184307A (en) * 1988-04-18 1993-02-02 3D Systems, Inc. Method and apparatus for production of high resolution three-dimensional objects by stereolithography
US5258146A (en) * 1988-09-26 1993-11-02 3D Systems, Inc. Method of and apparatus for measuring and controlling fluid level in stereolithography
US5902537A (en) * 1995-02-01 1999-05-11 3D Systems, Inc. Rapid recoating of three-dimensional objects formed on a cross-sectional basis
US6554600B1 (en) * 1998-10-09 2003-04-29 Eos Gmbh Electro Optical Systems Device for producing a three-dimensional object, especially a laser sintering machine
US20040026418A1 (en) * 2000-09-26 2004-02-12 Ingo Ederer Interchangeable container
US20040035542A1 (en) * 2000-09-26 2004-02-26 Ingo Ederer Device for manufacturing models layer by layer
US20050263932A1 (en) * 2002-08-02 2005-12-01 Martin Heugel Device and method for the production of three-dimensional objects by means of generative production method
US20060022379A1 (en) * 2004-07-30 2006-02-02 Board Of Regents, The University Of Texas System Multi-material stereolithography

Family Cites Families (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896904A (en) * 1974-04-29 1975-07-29 Bruce A Walker Two-wheel hand truck with elevator
JPS55146015A (en) 1979-05-02 1980-11-14 Ebara Corp Non-contact measuring method for surface level and its measuring unit
US5554336A (en) * 1984-08-08 1996-09-10 3D Systems, Inc. Method and apparatus for production of three-dimensional objects by stereolithography
US4575330B1 (en) * 1984-08-08 1989-12-19
US5236637A (en) * 1984-08-08 1993-08-17 3D Systems, Inc. Method of and apparatus for production of three dimensional objects by stereolithography
US4722856A (en) * 1986-01-02 1988-02-02 Molecular Electronics Corporation Method and apparatus for depositing monomolecular layers on a substrate
US5174931A (en) * 1988-09-26 1992-12-29 3D Systems, Inc. Method of and apparatus for making a three-dimensional product by stereolithography
JP2737195B2 (en) 1988-12-28 1998-04-08 ソニー株式会社 Three-dimensional shape forming apparatus
JPH0740690Y2 (en) * 1989-09-12 1995-09-20 本田技研工業株式会社 Ignition timing control system for an internal combustion engine
JPH0491929A (en) * 1989-10-27 1992-03-25 Three D Syst Inc Stereolithography system and method
US5071337A (en) * 1990-02-15 1991-12-10 Quadrax Corporation Apparatus for forming a solid three-dimensional article from a liquid medium
US5358673A (en) * 1990-02-15 1994-10-25 3D Systems, Inc. Applicator device and method for dispensing a liquid medium in a laser modeling machine
US5626919A (en) * 1990-03-01 1997-05-06 E. I. Du Pont De Nemours And Company Solid imaging apparatus and method with coating station
US5693144A (en) * 1990-03-19 1997-12-02 3D Systems, Inc. Vibrationally enhanced stereolithographic recoating
US5096530A (en) * 1990-06-28 1992-03-17 3D Systems, Inc. Resin film recoating method and apparatus
US5248249A (en) * 1990-07-27 1993-09-28 Sony Corporation Three-dimensional structure forming apparatus provided with a liquid-level control system for a main resin tank
JP2912721B2 (en) 1991-02-19 1999-06-28 日本電信電話株式会社 Method of forming three-dimensional objects
JP2519855B2 (en) * 1991-12-19 1996-07-31 日精樹脂工業株式会社 Resin molding method
FR2692066A1 (en) 1992-06-05 1993-12-10 Laser Int Sa A method for making an industrial part model by partial transformation of a liquid under the action of light and this method Óoeuvre formatting device.
JPH06226864A (en) 1993-02-04 1994-08-16 Shiimetsuto Kk Photo-setting shaping device fitted with inflow stabilizer
JP3441203B2 (en) 1994-12-09 2003-08-25 シーメット株式会社 Liquid level control device with light-curing stereolithography apparatus
DE19515165C2 (en) * 1995-04-25 1997-03-06 Eos Electro Optical Syst Apparatus for producing an object by stereolithography
JPH08338753A (en) 1995-06-12 1996-12-24 C Met Kk Measuring apparatus for liquid surface height of photocuring liquid
GB9615839D0 (en) 1996-07-27 1996-09-11 Chatwin Chris R Reapplication of materials for object fabrication
DE59701299D1 (en) * 1996-07-29 2000-04-27 Ciba Sc Holding Ag Liquid, radiation-curable composition, in particular for stereolithography
US5922364A (en) * 1997-03-03 1999-07-13 Young, Jr.; Albert C. Stereolithography layering control system
JPH111242A (en) * 1997-04-15 1999-01-06 Taimu Assoc:Kk Container for receiving liquid, quasi-liquid, granule or powder substance
US6157663A (en) * 1998-04-16 2000-12-05 3D Systems, Inc. Laser with optimized coupling of pump light to a gain medium in a side-pumped geometry
JPH11342541A (en) 1998-06-01 1999-12-14 Sanyo Electric Co Ltd Photo-fabrication device
JP3140741B2 (en) 1998-11-24 2001-03-05 松下電工株式会社 A method of forming a three-dimensional shape
JP4030666B2 (en) * 1998-11-24 2008-01-09 ナブテスコ株式会社 Optical shaping apparatus
DE19939617A1 (en) 1999-08-20 2001-03-29 Deltamed Medizinprodukte Gmbh Apparatus and method for producing a three-dimensional object
DE10158169B4 (en) * 2001-11-28 2007-02-08 Cl Schutzrechtsverwaltungs Gmbh An apparatus for producing and / or processing of components of powder particles
US20040026415A1 (en) * 2002-08-08 2004-02-12 Cibotika Srl Microwave oven for heating and/or cooking foodstuffs which have been deep-frozen and/or frozen and /or iced and/or thermally reduced, by carrying out a temperature increase of more than 80 degrees centigrade in a few seconds
JP3834816B2 (en) * 2003-04-24 2006-10-18 船井電機株式会社 The objective lens unit
US20060078638A1 (en) 2004-10-08 2006-04-13 3D Systems, Inc. Stereolithographic apparatus
US7790096B2 (en) 2005-03-31 2010-09-07 3D Systems, Inc. Thermal management system for a removable build chamber for use with a laser sintering system
US7690909B2 (en) * 2005-09-30 2010-04-06 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20070075461A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US7520740B2 (en) * 2005-09-30 2009-04-21 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20070077323A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US7621733B2 (en) * 2005-09-30 2009-11-24 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US7585450B2 (en) * 2005-09-30 2009-09-08 3D Systems, Inc. Rapid prototyping and manufacturing system and method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652193A (en) * 1969-11-06 1972-03-28 Jaroslav F Adamik Slush molding machine
US5184307A (en) * 1988-04-18 1993-02-02 3D Systems, Inc. Method and apparatus for production of high resolution three-dimensional objects by stereolithography
US5258146A (en) * 1988-09-26 1993-11-02 3D Systems, Inc. Method of and apparatus for measuring and controlling fluid level in stereolithography
US5182715A (en) * 1989-10-27 1993-01-26 3D Systems, Inc. Rapid and accurate production of stereolighographic parts
US5902537A (en) * 1995-02-01 1999-05-11 3D Systems, Inc. Rapid recoating of three-dimensional objects formed on a cross-sectional basis
US6554600B1 (en) * 1998-10-09 2003-04-29 Eos Gmbh Electro Optical Systems Device for producing a three-dimensional object, especially a laser sintering machine
US20040026418A1 (en) * 2000-09-26 2004-02-12 Ingo Ederer Interchangeable container
US20040035542A1 (en) * 2000-09-26 2004-02-26 Ingo Ederer Device for manufacturing models layer by layer
US20050263932A1 (en) * 2002-08-02 2005-12-01 Martin Heugel Device and method for the production of three-dimensional objects by means of generative production method
US20060022379A1 (en) * 2004-07-30 2006-02-02 Board Of Regents, The University Of Texas System Multi-material stereolithography

Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110062633A1 (en) * 2004-05-07 2011-03-17 Envisiontec Gmbh Process for the production of a three-dimensional object with an improved separation of hardened material layers from a construction plane
US7845930B2 (en) 2004-05-07 2010-12-07 Envisiontec Gmbh Process for the production of a three-dimensional object with an improved separation of hardened material layers from a construction plane
US8394313B2 (en) 2004-05-07 2013-03-12 Envisiontec Gmbh Process for the production of a three-dimensional object with an improved separation of hardened material layers from a construction plane
US20050248062A1 (en) * 2004-05-10 2005-11-10 Alexandr Shkolnik Process for the production of a three-dimensional object with resolution improvement by "pixel-shift"
US7790093B2 (en) 2004-05-10 2010-09-07 Envisiontec Gmbh Process for the production of a three-dimensional object with resolution improvement by “pixel-shift”
US20110196529A1 (en) * 2004-05-10 2011-08-11 Envisiontec Gmbh Process for the Production of a Three-Dimensional Object With Resolution Improvement by "Pixel Shift"
US8862260B2 (en) 2004-05-10 2014-10-14 Envisiontec Gmbh Process for the production of a three-dimensional object with resolution improvement by “pixel shift”
USRE43955E1 (en) 2004-05-10 2013-02-05 Envisiontec Gmbh Process for the production of a three-dimensional object with resolution improvement by pixel-shift
US20110009992A1 (en) * 2004-05-10 2011-01-13 Envisiontec Gmbh Process for the Production of a Three-Dimensional Object With Resolution Improvement by Pixel Shift
US7785093B2 (en) 2004-10-08 2010-08-31 3D Systems, Inc. Stereolithographic apparatus
US20080217818A1 (en) * 2004-10-08 2008-09-11 Holmboe Scott B Stereolithographic Apparatus
US20060192312A1 (en) * 2005-02-28 2006-08-31 3D Systems, Inc. Multiple vat leveling system
US20070075459A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US8105527B2 (en) 2005-09-30 2012-01-31 3D Systems, Inc, Rapid prototyping and manufacturing system and method
US20070075458A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US7621733B2 (en) 2005-09-30 2009-11-24 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US7520740B2 (en) 2005-09-30 2009-04-21 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20100038268A1 (en) * 2005-09-30 2010-02-18 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US7690909B2 (en) 2005-09-30 2010-04-06 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20100156003A1 (en) * 2005-09-30 2010-06-24 3D Systems, Inc. Rapid Prototyping and Manufacturing System and Method
US20070074659A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20070077323A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US20070075460A1 (en) * 2005-09-30 2007-04-05 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US7585450B2 (en) 2005-09-30 2009-09-08 3D Systems, Inc. Rapid prototyping and manufacturing system and method
US8126580B2 (en) 2006-04-26 2012-02-28 Envisiontec Gmbh Device and method for producing a three-dimensional object by means of mask exposure
US20110101570A1 (en) * 2006-04-28 2011-05-05 Envisiontec Gmbh Device and Method for Producing a Three-Dimensional Object by Means of Mask Exposure
US7894921B2 (en) 2006-04-28 2011-02-22 Envisiontec Gmbh Device and method for producing a three-dimensional object by means of mask exposure
US7783371B2 (en) 2006-04-28 2010-08-24 Envisiontec Gmbh Device and method for producing a three-dimensional object by means of mask exposure
US8815143B2 (en) 2006-04-28 2014-08-26 Envisiontec Gmbh Method for producing a three-dimensional object by means of mask exposure
US7831328B2 (en) 2006-07-19 2010-11-09 Envisiontec Gmbh Method and device for producing a three-dimensional object, and computer and data carrier useful therefor
US20080021586A1 (en) * 2006-07-19 2008-01-24 Volker Schillen Method and device for producing a three-dimensional object, and computer and data carrier useful therefor
US20090132081A1 (en) * 2006-07-19 2009-05-21 Envisiontec Gmbh Method and device for producing a three-dimensional object, and computer and data carrier useful therefor
US7892474B2 (en) 2006-11-15 2011-02-22 Envisiontec Gmbh Continuous generative process for producing a three-dimensional object
US8465689B2 (en) 2007-01-17 2013-06-18 3D Systems, Inc. Elevator and method for tilting solid image build platform for reducing air entrainment and for build release
US9067361B2 (en) 2007-07-04 2015-06-30 Envisiontec Gmbh Process and device for producing a three-dimensional object
US8845316B2 (en) 2007-07-04 2014-09-30 Envisiontec Gmbh Process and device for producing a three-dimensional object
US20090061161A1 (en) * 2007-08-27 2009-03-05 Lynn Sheehan Laser patterning of a cross-linked polymer
US20090311489A1 (en) * 2007-08-27 2009-12-17 Lynn Sheehan Laser patterning of a carbon nanotube layer
US8540922B2 (en) 2007-08-27 2013-09-24 Hewlett-Packard Development Company, L.P. Laser patterning of a carbon nanotube layer
US20090130449A1 (en) * 2007-10-26 2009-05-21 Envisiontec Gmbh Process and freeform fabrication system for producing a three-dimensional object
US20090146344A1 (en) * 2007-10-26 2009-06-11 Envisiontec Gmbh Process and freeform fabrication system for producing a three-dimensional object
US8003040B2 (en) 2007-10-26 2011-08-23 Envisiontec Gmbh Process and freeform fabrication system for producing a three-dimensional object
US8658076B2 (en) 2007-10-26 2014-02-25 Envisiontec Gmbh Process and freeform fabrication system for producing a three-dimensional object
US8110135B2 (en) 2007-10-26 2012-02-07 Envisiontec Gmbh Process and freeform fabrication system for producing a three-dimensional object
US8678805B2 (en) 2008-12-22 2014-03-25 Dsm Ip Assets Bv System and method for layerwise production of a tangible object
US8777602B2 (en) 2008-12-22 2014-07-15 Nederlandse Organisatie Voor Tobgepast-Natuurwetenschappelijk Onderzoek TNO Method and apparatus for layerwise production of a 3D object
US8905739B2 (en) 2008-12-22 2014-12-09 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Method and apparatus for layerwise production of a 3D object
US8521319B2 (en) * 2009-09-28 2013-08-27 Siemens Medical Instruments Pte. Ltd. Method of producing a housing shell or ear mold to be worn in the ear
US20110077760A1 (en) * 2009-09-28 2011-03-31 Siemens Medical Instruments Pte. Ltd. Method of producing a housing shell or ear mold to be worn in the ear
US9486944B2 (en) 2009-10-19 2016-11-08 Global Filtration Systems Resin solidification substrate and assembly
US20110089610A1 (en) * 2009-10-19 2011-04-21 Global Filtration Systems Resin Solidification Substrate and Assembly
US8372330B2 (en) 2009-10-19 2013-02-12 Global Filtration Systems Resin solidification substrate and assembly
US9527244B2 (en) 2014-02-10 2016-12-27 Global Filtration Systems Apparatus and method for forming three-dimensional objects from solidifiable paste
US20150273520A1 (en) * 2014-03-26 2015-10-01 Seiko Epson Corporation Method of manufacturing three-dimensional structure and three-dimensional structure
US9833952B2 (en) * 2014-08-28 2017-12-05 Roland Dg Corporation Three-dimensional printing apparatus
US20160059494A1 (en) * 2014-08-28 2016-03-03 Roland Dg Corporation Three-dimensional printing apparatus
WO2016198291A1 (en) 2015-06-09 2016-12-15 Politecnico Di Milano A device for direct additive manufacturing by means of extrusion of metal powders and ceramic materials on a parallel kinematic table
WO2016205020A1 (en) * 2015-06-19 2016-12-22 Elwha Llc Printing systems and related methods
CN106182783A (en) * 2016-08-31 2016-12-07 广州黑格智能科技有限公司 3D printing machine

Also Published As

Publication number Publication date Type
EP1719608A3 (en) 2006-11-29 application
JP4745783B2 (en) 2011-08-10 grant
US20080217818A1 (en) 2008-09-11 application
JP2006111013A (en) 2006-04-27 application
EP1645402B1 (en) 2011-05-18 grant
EP1645402A1 (en) 2006-04-12 application
EP1719608A2 (en) 2006-11-08 application
US7785093B2 (en) 2010-08-31 grant

Similar Documents

Publication Publication Date Title
Stansbury et al. 3D printing with polymers: Challenges among expanding options and opportunities
Frank et al. Expert system-based selection of the preferred direction of build for rapid prototyping processes
Lü et al. Laser-induced materials and processes for rapid prototyping
US5902538A (en) Simplified stereolithographic object formation methods of overcoming minimum recoating depth limitations
US6169605B1 (en) Method and apparatus for the computer-controlled manufacture of three-dimensional objects from computer data
Levy et al. Rapid manufacturing and rapid tooling with layer manufacturing (LM) technologies, state of the art and future perspectives
US5594652A (en) Method and apparatus for the computer-controlled manufacture of three-dimensional objects from computer data
US6682684B1 (en) Procedures for rapid build and improved surface characteristics in layered manufacture
US6399010B1 (en) Method and apparatus for stereolithographically forming three dimensional objects with reduced distortion
Ashley Rapid prototyping is coming of age
Rosochowski et al. Rapid tooling: the state of the art
US6405095B1 (en) Rapid prototyping and tooling system
US5216616A (en) System and method for computer automated manufacture with reduced object shape distortion
US5855718A (en) Method of and apparatus for making partially solidified three-dimensional objects on a layer-by-layer basis from a solidifiable medium
US6084980A (en) Method of and apparatus for deriving data intermediate to cross-sectional data descriptive of a three-dimensional object
US5529471A (en) Additive fabrication apparatus and method
US7305367B1 (en) Instantaneous price quotation system for custom manufactured parts
US7972129B2 (en) Compound tooling system for molding applications
US6623687B1 (en) Process of making a three-dimensional object
US6214279B1 (en) Apparatus and process for freeform fabrication of composite reinforcement preforms
US5598340A (en) Method of producing industrial components by the action of light on a polymerizable or crosslinkable liquid substance without requiring supports
US5776409A (en) Thermal stereolithograp using slice techniques
US20020093115A1 (en) Layer manufacturing method and apparatus using a programmable planar light source
US5176188A (en) Investment casting method and pattern material comprising thermally-collapsible expanded microspheres
US6500378B1 (en) Method and apparatus for creating three-dimensional objects by cross-sectional lithography

Legal Events

Date Code Title Description
AS Assignment

Owner name: 3D SYSTEMS, INC., CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOLMBOE, SCOTT B.;REYNOLDS, GARY L.;STONESMITH, MATTHEW K.;AND OTHERS;REEL/FRAME:015607/0001;SIGNING DATES FROM 20041021 TO 20041025