公开(公告)号：US5462107A

公开(公告)日：1995-10-31

申请号：US266549

申请日：1994-06-28

申请人： Tamotsu Hasegawa ,  Yasuyuki Arakawa ,  Atushi Ota

发明人： Tamotsu Hasegawa ,  Yasuyuki Arakawa ,  Atushi Ota

IPC分类号： B22D18/08 ,  B22D18/06 ,  B22D18/04

CPC分类号： B22D18/06

摘要： In a vacuum casting method, a molding cavity is reduced in pressure to a vacuum, and when a gate is opened, a molten metal which has been raised to a molten metal retaining dome is charged into the molding cavity at a high speed. When a portion of a molten metal held in a molten metal holding furnace is raised to the molten metal retaining dome via a stalk, (1) the rising speed of a portion of the molten metal is set at 5-10 cm/sec, or (2) the rising speed is varied between an early stage of the rising motion and a later stage of the rising motion. In the latter method, the rising speed at the early stage of the rising motion is set at a speed higher than 10 cm/sec, while the rising speed at the later stage of the rising motion is set at 5-10 cm/sec. Due to the rising speed control, air involvement by the rising molten metal is effectively prevented.

摘要翻译： 在真空铸造方法中，模制空腔的压力降低到真空，当打开浇口时，已经升高到熔融金属保持圆顶的熔融金属以高速加入到模腔中。 当保持在熔融金属保持炉中的熔融金属的一部分经由柄杆升高到熔融金属保持拱顶时，（1）将熔融金属的一部分的上升速度设定为5-10cm / sec，或 （2）上升速度在上升运动的早期阶段与上升运动的后期阶段不同。 在后一种方法中，将上升运动的早期阶段的上升速度设定为高于10cm / sec的速度，而将上升运动的后期的上升速度设定为5-10cm / sec。 由于速度控制的上升，有效地防止了上升的熔融金属对空气的影响。

公开(公告)号：US5431212A

公开(公告)日：1995-07-11

申请号：US267901

申请日：1994-07-06

申请人： Yasuyuki Arakawa ,  Tamotsu Hasegawa ,  Atushi Ota ,  Minoru Uozumi

发明人： Yasuyuki Arakawa ,  Tamotsu Hasegawa ,  Atushi Ota ,  Minoru Uozumi

IPC分类号： B22D18/06 ,  B22D18/08 ,  B22D18/04

CPC分类号： B22D18/06

摘要： In a method of vacuum casting wherein when the molten metal previously introduced into a molten metal reservoir is fed into a cavity, the lowest head of the molten metal in the molten metal reservoir is held to be higher than the level of a sprue, so that the cycle time of casting may be shortened and the quality of cast products may be improved. To this end, the interior of the molten metal reservoir is held gas tight while the sprue is opened by a gate member of straight tubular shape.

摘要翻译： 在真空铸造的方法中，当将先前引入熔融金属储存器中的熔融金属进料到空腔中时，熔融金属储存器中的熔融金属的最低头部被保持为高于浇道的水平，使得 可以缩短铸造的循环时间，并且可以提高铸造产品的质量。 为此，熔融金属储存器的内部保持气密，同时浇口由直管状的浇口构件打开。

公开(公告)号：US5427170A

公开(公告)日：1995-06-27

申请号：US272160

申请日：1994-07-08

申请人： Yasuyuki Arakawa ,  Tamotsu Hasegawa ,  Atushi Ota ,  Minoru Uozumi

发明人： Yasuyuki Arakawa ,  Tamotsu Hasegawa ,  Atushi Ota ,  Minoru Uozumi

IPC分类号： B22D17/22 ,  B22D18/02 ,  B22D18/06 ,  B22D18/04

CPC分类号： B22D18/06

摘要： A vacuum casting apparatus includes a plurality of pressure pins arranged in a molding cavity, and at least one pressure pin is located in a portion of the molding cavity farthest from a gate. The pressure pins are operated to pressurize the molding cavity in an order from the pressure pin located farthest from the gate to a pressure pin located nearest to the gate. A cross-sectional area reduced portion can also be formed in a portion of a runner connecting the molding cavity and the molten metal retaining dome. A molten metal in the molding cavity is thereby suppressed from flowing backward into the molten metal retaining dome when being pressurized by the pressure pins, so that the quality of the cast products is improved.

摘要翻译： 真空铸造装置包括布置在模制腔中的多个压力销，并且至少一个压力销位于距离浇口最远的模制腔的一部分中。 压力销被操作以从位于最远离门的压力销到位于最靠近门的压力销的顺序上的顺序对成型腔加压。 横截面减小部分也可以形成在连接模制腔和熔融金属保持圆顶的流道的一部分中。 由此，当通过压销加压时，模制腔中的熔融金属被抑制回流入熔融金属保持拱顶，从而提高了铸造产品的质量。

公开(公告)号：US5454416A

公开(公告)日：1995-10-03

申请号：US266780

申请日：1994-06-29

申请人： Atushi Ota ,  Yasuyuki Arakawa ,  Tamotsu Hasegawa

发明人： Atushi Ota ,  Yasuyuki Arakawa ,  Tamotsu Hasegawa

IPC分类号： B22D27/09 ,  B22D18/06 ,  B22D18/02 ,  B22D18/04

CPC分类号： B22D18/06

摘要： A vacuum casting apparatus in which a molding cavity is reduced in pressure substantially to a vacuum, and upon opening a gate, a molten metal which has been raised to a molten metal retaining dome is charged into the molding cavity via a runner at a high speed. The runner has a first portion making a pool of molten metal, a second portion connecting the molten metal retaining dome to the first portion, and a third portion connecting the first portion to the molding cavity. A pin is slidably provided in the first portion of the runner. An opening of the second portion of the runner to the first portion is located nearer to the pin than an opening of the third portion of the runner to the first portion. When the pin is moved into the first portion of the runner, the pin first closes the opening of the second portion and then begins to apply pressure the molten metal in the molding cavity.

摘要翻译： 一种真空铸造装置，其中模制腔的压力基本上减小到真空，并且在打开浇口时，已经升高到熔融金属保持圆顶的熔融金属通过高速运转的流道装入模腔中 。 流道具有制造熔融金属池的第一部分，将熔融金属保持圆顶连接到第一部分的第二部分，以及将第一部分连接到模制腔的第三部分。 销可滑动地设置在跑步者的第一部分中。 流道的第二部分到第一部分的开口位于比第一部分的流道的第三部分的开口更靠近销的位置。 当销移动到流道的第一部分中时，销先关闭第二部分的开口，然后开始对模腔中的熔融金属施加压力。

公开(公告)号：US5298094A

公开(公告)日：1994-03-29

申请号：US799977

申请日：1991-11-29

申请人： Atushi Ota ,  Minoru Uozumi ,  Hirokazu Oonishi ,  Yoji Awano ,  Yoshihiro Shimizu ,  Hiroshi Kawahara

发明人： Atushi Ota ,  Minoru Uozumi ,  Hirokazu Oonishi ,  Yoji Awano ,  Yoshihiro Shimizu ,  Hiroshi Kawahara

IPC分类号： C22C21/02 ,  C22C21/04 ,  C22F1/043 ,  C22F1/04

CPC分类号： C22F1/043 ,  C22C21/02 ,  C22C21/04

摘要： Disclosed are an aluminum alloy casting having a high strength and a high toughness, and a production process for the same. The aluminum alloy casting comprises silicon (Si) in an amount of 2.5 to 4.4% by weight, copper (Cu) in an amount of 1.5 to 2.5% by weight, magnesium (Mg) in an amount of 0.2 to 0.5% by weight and the balance of aluminum (Al), and a matrix thereof includes a dendrite which has a size of 30 micrometers or less. Since the Si addition amount is suppressed as less as possible and since the size of the dendrite is micro-fined in the aluminum alloy casting, the toughness is improved remarkably. Further, since the Cu and Mg are added in the predetermined addition amounts, the strength is enhanced in the aluminum alloy casting. In addition, a solution treatment which is employed in the production process can further enhance the strength of the aluminum alloy casting.

摘要翻译： 公开了具有高强度和高韧性的铝合金铸件及其制造方法。 铝合金铸件包含2.5〜4.4重量％的硅（Si），1.5〜2.5重量％的铜（Cu），0.2〜0.5重量％的镁（Mg），0.2〜0.5重量％ 铝（Al）的平衡和其基体包括具有30微米或更小的尺寸的枝晶。 由于Si添加量尽可能少地被抑制，并且由于在铝合金铸件中枝晶的尺寸微细化，所以韧性显着提高。 此外，由于以规定的添加量添加Cu和Mg，所以在铝合金铸件中强度提高。 此外，在制造方法中使用的固溶处理能够进一步提高铝合金铸件的强度。