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    • 1. 发明授权
    • Production of ceramic articles
    • 陶瓷制品生产
    • US4185061A
    • 1980-01-22
    • US926012
    • 1978-07-19
    • Jonathan W. Hinton
    • Jonathan W. Hinton
    • B28B3/02C04B35/56
    • B28B3/02
    • An improved method for producing a ceramic insulator is disclosed. The method comprises the steps of charging ceramic batch into a longitudinally extending die in which stepped arbors are supported by a plunger, forming a blank by pressing the batch between the arbor plunger and an opposing plunger, ejecting the blank and removing the arbors therefrom, contouring the blank to a desired shape, and firing the contoured blank. The insulator has a length-to-diameter ratio greater than 3:1 but not greater than 8:1; the improvement constitutes controlling the relative movements of the opposing plungers with respect to the longitudinal wall of the die during pressing of the blank so that at least 80 percent of the total plunger movement is in the direction of decreasing arbor diameter whereby variations in the end-to-end density of the insulator are minimized. Where 80 percent to 90 percent of the plunger movement is in the recited direction, a further improvement involves contouring the longitudinal surface of the blank to form generally a solid of revolution about the longitudinal axis of the blank wherein the diameter of the blank is greater than the desired fired diameter by a percentage which varies as an inverse function of the end-to-end density of the blank in order to achieve the desired longitudinal surface contour for the fired blank.
    • 公开了一种用于制造陶瓷绝缘体的改进方法。 该方法包括以下步骤:将陶瓷批料装入纵向延伸的模具中,其中阶梯状轴承由柱塞支撑,通过在轴杆柱塞和相对的柱塞之间挤压批料形成坯料,喷出坯料并从其中移除轴心, 将坯料变成所需的形状,并且烧制轮廓的坯料。 绝缘体的长径比大于3:1但不大于8:1; 该改进构成在坯料压制期间相对于模具的纵向壁的相对活塞的相对运动控制,使得总柱塞运动的至少80%在减小心轴直径的方向上, 使绝缘子的端对端密度最小化。 在柱塞运动的80%至90%处于所述方向的情况下,进一步的改进包括使坯料的纵向表面成型,以形成围绕坯料的纵向轴线的大体上的转动实心,其中坯料的直径大于 期望的烧制直径以作为坯料的端到端密度的反函数而变化的百分比,以实现用于烧制坯料的期望的纵向表面轮廓。
    • 2. 发明授权
    • Method for the production of a ceramic insulator
    • 制造陶瓷绝缘体的方法
    • US4368166A
    • 1983-01-11
    • US295935
    • 1981-08-24
    • Jonathan W. HintonFrederick J. PowellRobert W. Matz
    • Jonathan W. HintonFrederick J. PowellRobert W. Matz
    • B28B1/00B28B7/28G01N27/407C04B37/00
    • G01N27/407B28B1/002B28B7/28
    • A ceramic insulator and a method for the production thereof are disclosed. The method comprises the steps of pressing ceramic batch around a contoured arbor having at least two longitudinally extending fins to form an outer piece having a bore with grooves therein corresponding to the fins, removing the arbor from and contouring the piece to a desired external shape, pressing ceramic batch to form an inner piece, and contouring the inner piece to fit within the bore of the outer piece. The inner piece is then positioned within the bore of the outer piece and both pieces are fired whereby the insulator is produced in which the contoured surface of the inner piece closes the grooves in the bore of the outer piece to form slots extending longitudinally within the ceramic insulator. Also disclosed is a method which involves firing the inner piece, positioning the fired inner piece within the bore of the unfired outer piece, and then firing both pieces together. A ceramic insulator according to the invention is useful as a support for an oxygen sensor which can be placed in the exhaust gases from an internal combustion engine and used to measure oxygen content thereof to enable control of the air-fuel ratio at which the engine is operated so that, for example, emissions can be minimized.
    • 公开了一种陶瓷绝缘子及其制造方法。 该方法包括以下步骤:在具有至少两个纵向延伸的翅片的轮廓心轴周围挤压陶瓷批料,以形成具有孔的外部件,孔中的凹槽对应于翅片,从而将刀片移除并使其成形为期望的外部形状, 压制陶瓷批料以形成内部件,并且使内部件成形以配合在外部件的孔内。 然后将内部件定位在外部件的孔内并且两个件被烧制,由此制造绝缘体,其中内部件的轮廓表面封闭外部件的孔中的凹槽,以形成在陶瓷内纵向延伸的槽 绝缘子。 还公开了一种方法,其包括烧制内部件,将烧制的内部件定位在未烧制的外部件的孔内,然后将两个部件烧结在一起。 根据本发明的陶瓷绝缘子可用作氧传感器的支撑件,该传感器可以放置在来自内燃机的废气中并用于测量其含氧量,以便能够控制发动机的空燃比 例如,可以使排放量最小化。