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    METHOD OF BUILDING THREE-DIMENSIONAL OBJECTS WITH MODIFIED ABS MATERIALS
    72.
    发明专利
    METHOD OF BUILDING THREE-DIMENSIONAL OBJECTS WITH MODIFIED ABS MATERIALS 未知

    公开(公告)号：CA2678579A1

    公开(公告)日：2008-09-18

    申请号：CA2678579

    申请日：2008-02-15

    Applicant: STRATASYS INC

    Inventor： HOPKINS PAUL E

    IPC: B29C45/14

    Abstract: A method for building a 3D object (18) with an extrusion-based layered de position system comprising feeding a modified ABS material to an extrusion h ead (12) of the extrusion-based layered deposition system, melting the fed m odified ABS material in the extrusion head (12) under conditions that improv e a response time of the extrusion head (12), and depositing the molten ther moplastic material in a layer-by-layer manner to form the 3D object (18).

    CASETE DE FILAMENTO.
    73.
    发明专利
    CASETE DE FILAMENTO. 未知

    公开(公告)号：ES2231522T3

    公开(公告)日：2005-05-16

    申请号：ES01952987

    申请日：2001-07-12

    Applicant: STRATASYS INC

    Inventor： SWANSON WILLIAM JOHN ,  POPA MINEA A ,  TURLEY PATRICK W ,  PRIEDEMAN WILLIAM R JR ,  HOPKINS PAUL E ,  BROSE STEVE

    IPC: B29C31/00 ,  B29C41/36 ,  B29C41/52 ,  B29C67/00 ,  B29C71/02 ,  C08K5/00 ,  B29C41/12 ,  B65H16/10

    Abstract: Un casete (44, 184) de filamento, que comprende: -una cámara (69) que contiene un carrete giratorio (54, 186) de filamento de modelar enrollado (14, 188), que se hace fluido cuando se calienta; -un camino (70, 236) del filamento que conduce desde la cámara (59) hasta un orificio de salida (72, 238), y medios (116, 278, 279, 280, 282) para avanzar un tramo de filamento (14, 188) desde el carrete (54, 186) a lo largo del camino (70, 238) del filamento; caracterizado porque: -dicha cámara (59) contiene un suministro de desecante (62); y -dicha cámara (59) es hermética al aire; -en el que el citado casete (44, 184) de filamento es utilizado para suministrar filamento de modelar a una maquina (40, 180) de modelación tridimensional.

    74.
    发明专利
    未知

    公开(公告)号：DE69626131T2

    公开(公告)日：2003-10-23

    申请号：DE69626131

    申请日：1996-11-06

    Applicant: STRATASYS INC

    Inventor： BATCHELDER SAMUEL ,  JACKSON R

    IPC: B29C41/36 ,  B29C48/33 ,  B29C67/00 ,  G05B19/4099 ,  G06F17/50 ,  B29C47/06 ,  B29C47/24 ,  B29C47/10

    Abstract: An improved extrusion-based manufacturing system includes one or more extruders, with each extruder containing at least two stages of increasing pressurization. In a preferred embodiment, a first stage of pressurization is created by the motion of a solid wafer of thermoplastic through an orifice into a heater chamber. In another preferred embodiment, the wafers are stored in removable, electronically tagged, cassettes and are removed therefrom by a stapler mechanism which feeds the wafers from the cassette to a tractor feed mechanism on demand. In each embodiment, a second stage of pressurization is provided by a pump, with the first stage pressurization maintaining a flow of thermoplastic to the pump under all expected pump rates.

    LIQUIFIER PUMP CONTROL IN AN EXTRUSION APPARATUS
    76.
    发明专利
    LIQUIFIER PUMP CONTROL IN AN EXTRUSION APPARATUS 未知

    公开(公告)号：AU2002356950A1

    公开(公告)日：2003-06-30

    申请号：AU2002356950

    申请日：2002-11-14

    Applicant: STRATASYS INC

    Inventor： COMB JAMES W

    IPC: B29C41/36 ,  B29C41/52 ,  B29C47/02 ,  B29C47/10 ,  B29C48/92 ,  B29C67/00 ,  B29C41/02 ,  B29C47/00

    Abstract: An extrusion apparatus employs a method for controlling the output flow rate of a liquifier. The apparatus includes an extrusion head which moves along a predetermined tool path at an extrusion head velocity. The extrusion head carries a liquifier. The liquifier receives a solid element of a modeling material, heats the modeling material, and outputs a flow of the modeling material at an output flow rate. A material advance mechanism is employed to supply the solid element of modeling material to the liquifier at an input rate which controls the output flow rate. In order to control the output flow rate, an extrusion head velocity profile is determined based on the tool path. The input rate of modeling material to the liquifier is then controlled to produce an output flow rate of modeling material from the liquifier that is proportional to a current extrusion head velocity corresponding to the extrusion head velocity profile.

    77.
    发明专利
    未知

    公开(公告)号：DE69626131D1

    公开(公告)日：2003-03-13

    申请号：DE69626131

    申请日：1996-11-06

    Applicant: STRATASYS INC

    Inventor： BATCHELDER SAMUEL ,  JACKSON R

    IPC: B29C41/36 ,  B29C48/33 ,  B29C67/00 ,  G05B19/4099 ,  G06F17/50 ,  B29C47/06 ,  B29C47/24 ,  B29C47/10

    Abstract: An improved extrusion-based manufacturing system includes one or more extruders, with each extruder containing at least two stages of increasing pressurization. In a preferred embodiment, a first stage of pressurization is created by the motion of a solid wafer of thermoplastic through an orifice into a heater chamber. In another preferred embodiment, the wafers are stored in removable, electronically tagged, cassettes and are removed therefrom by a stapler mechanism which feeds the wafers from the cassette to a tractor feed mechanism on demand. In each embodiment, a second stage of pressurization is provided by a pump, with the first stage pressurization maintaining a flow of thermoplastic to the pump under all expected pump rates.

    79.
    发明专利
    未知

    公开(公告)号：DE69323858D1

    公开(公告)日：1999-04-15

    申请号：DE69323858

    申请日：1993-12-21

    Applicant: STRATASYS INC

    Inventor： ABRAMS STEVEN RICHARD ,  KOREIN JAMES UREY ,  SRINIVASAN VIJAY ,  TARABANIS KONSTANTINOS

    IPC: B29C67/00 ,  G05B19/4099 ,  G06F17/50

    Abstract: Beginning with a CAD specification of an object, the method and apparatus of the invention reduces the overall time to produce a shell of the object with a rapid prototyping machine. The reduction in time is achieved by interleaving the computation and the building tasks and by not requiring an explicit evaluation of a shell of the solid at the outset. The method is shown to operate with STL data, or with other CAD data, directly, and can also be employed to create non-planar objects, such as models of sheet metal parts that are represented only as surfaces. Furthermore, the method can be employed to produce a smooth outer surface even when employing polyhedral approximations to the surfaces of the object.

    Method for rapid prototyping of solid models
    80.
    发明专利
    Method for rapid prototyping of solid models 未知

    公开(公告)号：AU7602298A

    公开(公告)日：1998-12-30

    申请号：AU7602298

    申请日：1998-05-28

    Applicant: STRATASYS INC

    Inventor： BATCHELDER JOHN SAMUEL ,  CRUMP STEVEN SCOTT

    IPC: B29C67/00 ,  B29C41/02 ,  B29C41/46

    Abstract: Data corresponding to a desired shape of a prototype is transmitted to a rapid prototyping system. The system calculates a sequence for extruding flowable material that thermally solidifies so as to create the desired geometric shape. A heated flowable modeling material is then sequentially extruded at its deposition temperature into a build environment that maintains the volume in the vicinity of the newly deposited material in a deposition temperature window between the material's solidification temperature and its creep temperature. Subsequently the newly extruded material is gradually cooled below its solidification temperature, while maintaining temperature gradients in the geometric shape below a maximum value set by the desired part's geometric accuracy.

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