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公开(公告)号：US5725043A
公开(公告)日：1998-03-10
申请号：US710410
申请日：1996-09-17
Applicant: Richard L. Schaefer , Carl W. D. Schaefer , James M. Williamson , Norman L. Miller
Inventor： Richard L. Schaefer , Carl W. D. Schaefer , James M. Williamson , Norman L. Miller
IPC: B22D18/04
CPC classification number: B22D18/04
Abstract: Molten metal is delivered from a master furnace to the molten metal holding chamber of a low pressure casting machine by a launder assembly having a unitary, quickly replaceable, valve assembly including a valve which, when closed, prevents flow of the molten metal from the master furnace to the holding vessel. The valve has a plug mounted for rotation in a valve body which may be made from graphite. In a modification, the valve has a port centered in a valve plate and a movable plug which may be made from aluminum titanate. In operation, the valve is opened to permit the molten metal within the master furnace and the holding vessel to seek a substantially uniform level and closed when the low pressure casting process is initiated. While the valve is closed, a pressurizing gas is introduced into the holding vessel above the level of the molten metal therein so that molten metal will rise up a riser tube into the cavity of a mold or other molten metal-receiving member. After the cavity is filled and before the next molding operation is begun, the pressurizing gas is exhausted so the pressure above the molten metal in the holding vessel is lowered to or near to atmospheric pressure and the valve opened so that the molten metal in the holding vessel and the master furnace again begins to seek a substantially uniform level. This process can be repeated indefinitely to produce plural molded parts.
Abstract translation: 熔融金属通过具有一体式，快速可更换的阀组件的洗涤组件从主炉输送到低压铸造机的熔融金属容纳室，该组件包括阀，当关闭时，其阻止熔融金属从主体流出 炉子到容器。 该阀具有安装成用于在可由石墨制成的阀体中旋转的插头。 在一个变型中，阀具有一个位于阀板中心的端口和可由钛酸铝制成的活动塞。 在操作中，阀被打开以允许主炉和保持容器内的熔融金属寻求基本上均匀的水平并且在低压铸造过程开始时关闭。 当阀关闭时，加压气体在其中的熔融金属的高度上方被引入保持容器中，使得熔融金属将上升管升起到模具或其它熔融金属接收构件的空腔中。 在空腔填充之后并且在开始下一个模制操作之前，加压气体被排出，使得保持容器中的熔融金属上方的压力降低到或接近大气压力，并且阀打开，使得保持件中的熔融金属 船只和主炉再次开始寻求基本均匀的水平。 该过程可以无限期地重复以产生多个模制部件。
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公开(公告)号：US3996412A
公开(公告)日：1976-12-07
申请号：US541883
申请日：1975-01-17
Applicant: Carl W. D. Schaefer , Richard L. Schaefer , Gordon F. Kennedy
Inventor： Carl W. D. Schaefer , Richard L. Schaefer , Gordon F. Kennedy
CPC classification number: F27B3/08 , F27B14/06 , F27B2014/002 , F27B2014/0875 , F27D2099/0008 , F27D2099/0013 , F27D2099/004 , F27M2001/01
Abstract: An electrically energized aluminum melting furnace comprises a vessel for supporting molten aluminum and a roof and upper wall structure cooperating with side walls of the vessel to define a heating chamber above the molten aluminum. A plurality of unshielded resistance heating elements are supported by the roof and upper wall structure above the molten aluminum. The molten aluminum has access through a submerged opening to a charging well to which unmelted aluminum is periodically charged without danger that molten aluminum will splash upon the heating elements. Heat conducted from the heating chamber through the body of molten aluminum residing in the vessel is utilized to melt in the charging well the aluminum charged thereto. The melted aluminum in the charging well is permitted to flow through the heating chamber and through a submerged opening to a hot metal well from which hot metal may be withdrawn by any of numerous techniques. The heating chamber is so arranged that an oxide skin is preserved at the surface of the molten aluminum residing within the heating chamber, the oxide skin effecting an efficient transfer of radiant energy received from the resistance heating elements to the molten aluminum. The aforementioned roof and upper wall structure is rested upon furnace walls so as to allow a vertical growth of the furnace walls.
Abstract translation: 电通铝熔炉包括用于支撑熔融铝的容器和与容器的侧壁配合的顶壁和上壁结构，以在熔融铝上方限定加热室。 多个非屏蔽电阻加热元件由熔融铝上方的屋顶和上壁结构支撑。 熔融铝通过浸没的开口进入充电井，未熔化的铝周期性地进入，而不会使熔融铝溅到加热元件上。 从加热室通过容纳在容器中的熔融铝体引起的热量用于在充电井中熔化装入其中的铝。 允许充电井中的熔融铝流经加热室并通过浸入式开口进入热金属井，通过许多技术中的任何一种可以从该金属井中排出热金属。 加热室被布置成使氧化皮保存在位于加热室内的熔融铝的表面上，氧化皮表面有效地将从电阻加热元件接收的辐射能转移到熔融铝。 上述屋顶和上壁结构搁置在炉壁上，以允许炉壁垂直生长。
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公开(公告)号：US4027862A
公开(公告)日：1977-06-07
申请号：US642243
申请日：1975-12-19
Applicant: Carl W. D. Schaefer , Richard L. Schaefer , Gordon F. Kennedy
Inventor： Carl W. D. Schaefer , Richard L. Schaefer , Gordon F. Kennedy
Abstract: The upper structure of an aluminum melting furnace is constructed with supporting structure for a fossil fuel burner and supporting structure for electrically operated heating elements. The furnace may thus be operated with alternate heating systems, one system using fossil fuel and the other electricity.
Abstract translation: 铝熔化炉的上部结构构造有用于化石燃料燃烧器的支撑结构和用于电动加热元件的支撑结构。 因此炉子可以用替代的加热系统操作，一个使用化石燃料的系统和另一个电力。
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公开(公告)号：US5590681A
公开(公告)日：1997-01-07
申请号：US263240
申请日：1994-06-28
Applicant: Richard L. Schaefer , Carl W. D. Schaefer , James M. Williamson , Norman L. Miller
Inventor： Richard L. Schaefer , Carl W. D. Schaefer , James M. Williamson , Norman L. Miller
CPC classification number: B22D18/04 , Y10T137/598 , Y10T137/7036
Abstract: Molten metal is delivered from a master furnace to the molten metal holding chamber of a low pressure casting machine by a launder assembly having a unitary, quickly replaceable, valve assembly including a valve which, when closed, prevents flow of the molten metal from the master furnace to the holding vessel. The valve has a plug mounted for rotation in a valve body which may be made from graphite. In a modification, the valve has a port centered in a valve plate and a movable plug which may be made from aluminum titanate. In operation, the valve is opened to permit the molten metal within the master furnace and the holding vessel to seek a substantially uniform level and closed when the low pressure casting process is initiated. While the valve is closed, a pressurizing gas is introduced into the holding vessel above the level of the molten metal therein so that molten metal will rise up a riser tube into the cavity of a mold or other molten metal-receiving member. After the cavity is filled and before the next molding operation is begun, the pressurizing gas is exhausted so the pressure above the molten metal in the holding vessel is lowered to or near to atmospheric pressure and the valve opened so that the molten metal in the holding vessel and the master furnace again begins to seek a substantially uniform level. This process can be repeated indefinitely to produce plural molded parts.
Abstract translation: 熔融金属通过具有一体式，快速可更换的阀组件的洗涤组件从主炉输送到低压铸造机的熔融金属容纳室，该组件包括阀，当关闭时，其阻止熔融金属从主体流出 炉子到容器。 该阀具有安装成用于在可由石墨制成的阀体中旋转的插头。 在一个变型中，阀具有一个位于阀板中心的端口和可由钛酸铝制成的活动塞。 在操作中，阀被打开以允许主炉和保持容器内的熔融金属寻求基本上均匀的水平并且在低压铸造过程开始时关闭。 当阀关闭时，加压气体在其中的熔融金属的高度上方被引入保持容器中，使得熔融金属将上升管升起到模具或其它熔融金属接收构件的空腔中。 在空腔填充之后并且在开始下一个模制操作之前，加压气体被排出，使得保持容器中的熔融金属上方的压力降低到或接近大气压力，并且阀打开，使得保持件中的熔融金属 船只和主炉再次开始寻求基本均匀的水平。 该过程可以无限期地重复以产生多个模制部件。
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