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    Liquifier pump control in an extrusion apparatus
    53.
    发明专利
    Liquifier pump control in an extrusion apparatus 未知

    公开(公告)号：HK1071717A1

    公开(公告)日：2005-07-29

    申请号：HK05104978

    申请日：2005-06-15

    Applicant: STRATASYS INC

    Inventor： COMB JAMES W

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

    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.

    56.
    发明专利
    未知

    公开(公告)号：DE69625222D1

    公开(公告)日：2003-01-16

    申请号：DE69625222

    申请日：1996-09-17

    Applicant: STRATASYS INC

    Inventor： BATCHELDER S

    IPC: B22C7/02 ,  B29C47/00 ,  B29C67/00 ,  G05B19/00

    Abstract: A method of making a three dimensional object by depositing material in a predetermined pattern on a receiving surface, and introducing a predetermined porosity into the object being formed by positioning the deposited material so as to introduce pockets of air or other fluid into the part, and by adjusting the rate at which the material is dispensed from the dispenser. Optimal porosities in the object to be built depend upon the shape of the material when it is dispensed, but range generally from 1% to 26%.

    Process of support removal for three-dimensional modeling
    57.
    发明专利
    Process of support removal for three-dimensional modeling 未知

    公开(公告)号：GB2302836B

    公开(公告)日：1998-10-07

    申请号：GB9513360

    申请日：1995-06-30

    Applicant: STRATASYS INC

    Inventor： CRUMP STEVEN SCOTT ,  COMB JAMES W ,  PRIEDEMAN JR WILLIAM R ,  ZINNIEL ROBERT L

    IPC: B29C65/02 ,  B29C67/00 ,  B29K83/00

    Abstract: Processes and apparatus are disclosed for producing three-dimensional objects having overhanging portions freely suspended in space without any material of the object in direct, supporting engagement therewith in the final geometry of the object. A support structure is formed by depositing material which will be under the ultimately suspended portions of the object to be formed, during a process in which material is built up in layers to form the object as well as the underlying support structure. A readily removable support structure is formed along an interface with the underside of the suspended portion of the object structure. A weak, removable or breakable joint is formed along that interface by the use of an interface material which forms a weak or dissolvable bond with the material of the object. The release material may be deposited as a separation layer, or as a thin coating.

    58.
    发明专利
    未知

    公开(公告)号：DE69405614T2

    公开(公告)日：1998-02-05

    申请号：DE69405614

    申请日：1994-02-14

    Applicant: STRATASYS INC

    Inventor： BATCHELDER JOHN SAM ,  HALL SHAWN ANTHONY HALL ,  JACKSON ROBERT RUSSELL

    IPC: F04C2/00 ,  B29C47/60 ,  B29C48/395 ,  F04D3/02 ,  F04D29/18 ,  B29C47/38

    Abstract: A housing has a pump chamber and an outlet, with the chamber having a section with a conical shape, and the outlet located at a narrow end of the section. An impeller is rotatably located in the chamber and the impeller has a conical section with at least one logarithmic spiral groove along an exterior of the conical section. A front is located at the outlet which is smooth shaped with the groove not extending to the front. The impeller is spaced front he housing along the conical section with a constant gap.

    Trägerplattenausbau für ein additives Fertigungssystem
    60.
    发明专利
    Trägerplattenausbau für ein additives Fertigungssystem 未知

    公开(公告)号：DE112016004933T5

    公开(公告)日：2018-08-16

    申请号：DE112016004933

    申请日：2016-10-31

    Applicant: STRATASYS INC

    Inventor： SKUBIC ROBERT L ,  BUSHEY JOHN ,  BEERY CHAD E ,  BOSVELD MICHAEL D ,  STYER ROBERT E

    IPC: B29C67/00 ,  B29C47/06 ,  B33Y10/00

    Abstract: Ein additives Fertigungssystem (100, 2400) umfasst eine ausbaubare Druckbasis (106) und einen Antriebsmechanismus, der gestaltet ist, die ausbaubare Druckbasis (106) horizontal entlang einer Druckachse (120) zu indexieren, wobei der Antriebsmechanismus ein Gerüst (108) mit einem Rahmen mit einer Vielzahl von Stützschienen (1410) sowie ein Antriebssystem umfasst, das gestaltet ist, die Druckbasis (106) entlang dem Gerüst (108) zu bewegen. Ein schichtweises Verfahren zum Drucken eines dreidimensionalen Objekts (2402) mit einem additiven Fertigungssystem (100, 2400) umfasst das Drucken einer Vielzahl von Schichten des dreidimensionalen Objekts durch Auftragen von Material aus einem Druckkopf (110) auf eine Druckbasis (106) des additiven Fertigungssystems (100, 2400), Inkrementieren einer Position des Druckkopfes (110) relativ zu der Druckbasis (106), nachdem jede Schicht gedruckt ist, Indexieren der Druckbasis (106), die die gedruckten Schichten trägt, weg von dem Druckkopf (110) entlang der Druckachse (120), nachdem die Vielzahl von Schichten gedruckt ist, unter Verwendung eines Antriebsmechanismus. Drucken, Inkrementieren und Indexieren werden wiederholt, um das dreidimensionale Objekt aufzubauen. Die Druckbasis (106) wird von dem dreidimensionalen Objekt ausgebaut, wenn das dreidimensionale Objekt eine festgelegte Länge überschreitet.

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