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    • 21. 发明授权
    • Butterfly valve
    • US11022221B2
    • 2021-06-01
    • US16319267
    • 2017-07-19
    • ASAHI YUKIZAI CORPORATION
    • Kotaro Matsushita
    • F16K1/22
    • In this butterfly valve (10) provided with: a main body (11); valve shafts (13, 14); and a valve body (30) that is rotatable with respect to the main body, the valve body is formed integrally from a core material (32) and a contour forming member (31) that is formed from a synthetic resin material and that encircles the core material and forms the contour of the valve body. The valve body has bearing holes (33, 34) that support the valve shafts, the contour forming member has a bearing inner peripheral part (36) that forms at least a part of the inner peripheral surface of each of the bearing holes, the contour forming member is formed continuously with the bearing inner peripheral part, and the core material has a bearing reinforcing part (35) that supports the bearing inner peripheral part of the contour forming member, radially outside from the rotation axis of the valve body.
    • 26. 发明申请
    • METHOD OF PRODUCING CASTING MOLD AND CASTING MOLD
    • 生产铸造模具和铸造模具的方法
    • US20170050236A1
    • 2017-02-23
    • US15347005
    • 2016-11-09
    • ASAHI YUKIZAI CORPORATION
    • Yuichiro TANAKA
    • B22C1/18B22C9/12B22C9/02
    • Purposes of the present invention are to provide a dry coated sand having a high degree of fluidity at the room temperature, a method of advantageously producing the coated sand, and a method of producing a casting mold having excellent properties, by using the coated sand. The dry coated sand is obtained by mixing an aqueous solution of a water glass used as a binder, with a heated refractory aggregate, whereby water in the aqueous solution is evaporated, and a coating layer of the binder is formed on surfaces of the refractory aggregate. A moisture percentage in the thus obtained dry coated sand is controlled so as to be not more than 0.5% by mass. The intended casting mold is obtained by filling a molding cavity of a forming mold, with the dry coated sand, and passing a steam through the coated sand, to solidify or cure the coated sand.
    • 本发明的目的是提供一种在室温下具有高流动性的干涂层砂,有利地生产涂层砂的方法,以及通过使用涂覆的砂来生产具有优异性能的铸模的方法。 通过将用作粘合剂的水玻璃的水溶液与加热的耐火骨料混合,将水溶液中的水蒸发,并且在耐火材料聚集体的表面上形成粘合剂的涂层, 。 将这样得到的干涂布砂的水分率控制在0.5质量%以下。 通过将成型模具的模腔填充干燥的涂覆的砂,并使蒸汽通过涂覆的砂,使固化或固化涂覆的砂获得所需的模具。