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    Refractory cores and methods of making the same
    1.
    发明授权
    Refractory cores and methods of making the same 失效
    炼钢厂及其制造方法

    公开(公告)号：US3686006A

    公开(公告)日：1972-08-22

    申请号：US3686006D

    申请日：1970-12-02

    Applicant: PRECISION METALSMITHS INC

    Inventor： HORTON ROBERT A

    IPC: B22C1/20 ,  B22C1/22 ,  C04B33/13 ,  B28B7/28

    CPC classification number: B22C1/2293 ,  B22C1/20 ,  C04B33/13

    Abstract: REFRACTORY CORES WHICH CAN BE USED IN INVESTMENT CASTING WITHOUR FIRST HAVING BEEN FIRED TO AN ELEVATED TEMPERATURE ARE MADE BY A PROCESS CHARACTERIZED BY THE STEPS OF: (1) MOLDING A CORE FROM REFRACTORY MIXTURE INCLUDING A SUBLIMABLE BINDER, (2) SUBLIMING THE BINDER FROM THE CORE TO PRODUCE A POROUS STRUCTURE, (3) IMPREGNATING THE PORE STRUCTURE WITH A HARDENING AND STRENGTHENING AGENT, AND (4) HARDENING THE MATERIAL USED FOR IMPREGNATION.

    Refractory cores
    2.
    发明授权
    Refractory cores 失效
    炼钢厂

    公开(公告)号：US3688832A

    公开(公告)日：1972-09-05

    申请号：US3688832D

    申请日：1971-02-22

    Applicant: PRECISION METALSMITHS INC

    Inventor： HORTON ROBERT A

    IPC: B22C3/00 ,  C04B41/46 ,  C04B41/82

    CPC classification number: C04B41/009 ,  B22C3/00 ,  C04B41/46 ,  C04B41/82 ,  C04B41/53 ,  C04B35/00

    Abstract: Refractory cores, preferably used in investment casting, are hardened and strengthened by impregnating them with a melt of at least one organic compound characterized by (1) a melting point of at least 170* F., (2) the capability of being melted to a liquid and of being resolidified upon cooling, (3) the capability of being volatilized when heated to a temperature above the melting point, and (4) a preferred density of at least one gram per milliliter. The organic materials used for impregnation are selected from the classes consisting of non-cyclic or open-chain hydroxyl containing compounds and cyclic compounds, i.e., cyclic aliphatic and substituted or unsubstituted aromatic compounds including arenes. Molds which contain the impregnated cores are heated prior to being cast with metal to a temperature sufficient to volatilize the compound.

    Abstract translation: 优选用于熔模铸造的耐火芯通过用至少一种有机化合物的熔体浸渍它们来硬化和加强，其特征在于（1）熔点至少为170°F，（2）熔融的能力 液体，并在冷却时重新凝固，（3）当加热到高于熔点的温度时挥发的能力，和（4）优选的密度为至少1克/毫升。 用于浸渍的有机材料选自由非环状或开链羟基化合物和环状化合物组成的类别，即包括芳烃的环状脂族和取代或未取代的芳族化合物。 含有浸渍的芯的模具在用金属浇铸到足以挥发化合物的温度之前被加热。

    Apparatus for forming ceramic shell molds
    5.
    发明授权
    Apparatus for forming ceramic shell molds 失效
    用于形成陶瓷壳模具的装置

    公开(公告)号：US3871440A

    公开(公告)日：1975-03-18

    申请号：US37258673

    申请日：1973-06-22

    Applicant: PRECISION METALSMITHS INC

    Inventor： HORTON ROBERT A

    IPC: B22C13/08

    CPC classification number: B22C13/085

    Abstract: An apparatus is provided for simultaneously coating a plurality of pattern set-ups with refractory slurry in a single operation during the production of ceramic shell molds. An array of circumferentially spaced pattern set-ups is mounted for rotation about a horizontal axis so that each set-up is moved above the axis between a raised position and a lowered position in which the set-up is at least partially immersed in slurry. In one preferred embodiment of the invention provision is made for rotating each set-up about its longitudinal axis during the coating operation.

    Abstract translation: 提供了一种设备，用于在陶瓷壳模具的生产过程中，在单次操作中同时涂覆多个具有耐火材料浆料的图案。 围绕水平轴线安装一组圆周间隔图案设置，以使每个组件在升高位置和下降位置之间的轴线上移动，在该位置中，组件至少部分地浸入浆料中。 在本发明的一个优选实施例中，提供了在涂覆操作期间围绕其纵向轴线旋转每个装置。

    Methods of removing patterns from investment molds
    6.
    发明授权
    Methods of removing patterns from investment molds 失效
    从投资模式中删除图案的方法

    公开(公告)号：US3636190A

    公开(公告)日：1972-01-18

    申请号：US3636190D

    申请日：1967-09-25

    Applicant: PRECISION METALSMITHS INC

    Inventor： HORTON ROBERT A

    IPC: B22C9/04 ,  B29C1/02

    CPC classification number: B22C9/043

    Abstract: A method of removing patterns from an investment mold including the steps of subjecting the mold to a heated medium at a temperature sufficient to melt or soften the pattern material and to an external pressure sufficient to resist the cracking forces produced by the pattern material as it is heated.

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