公开(公告)号：US08418745B2

公开(公告)日：2013-04-16

申请号：US13648293

申请日：2012-10-10

Applicant: GM Global Technology Operations LLC

Inventor： Christopher D. Cogan ,  Stephen M. Fitch ,  Qigui Wang

IPC: B22D41/00

CPC classification number: B22D41/12 ,  B22D17/30 ,  B22D41/00 ,  B22D41/18 ,  B22D41/58

Abstract: A method of forming a casting using a casting apparatus is disclosed, the method including the steps of lowering a ladle having a hollow interior into a source of molten material and an aperture facilitating flow into the hollow interior, filling the interior of the ladle with the molten material through the aperture, introducing an inert gas into a portion of a nozzle, removing the ladle from the source of molten material, causing the nozzle to contact a casting mold, and pressurizing the hollow interior with an inert gas to cause the molten material to flow into the casting mold.

Abstract translation: 公开了一种使用铸造装置形成铸件的方法，该方法包括以下步骤：将具有中空内部的钢包放入熔融材料源中，以及促进流入中空内部的孔，并将其浇注到钢包的内部 熔融材料通过孔，将惰性气体引入喷嘴的一部分，从熔融材料源移除钢包，使喷嘴接触铸模，并用惰性气体对中空内部进行加压，以使熔融材料 流入铸模。

公开(公告)号：US09403209B2

公开(公告)日：2016-08-02

申请号：US13746558

申请日：2013-01-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Christopher D. Cogan ,  James T. Singer ,  Stephen M. Fitch ,  Maurice G. Meyer ,  David D. Goettsch

IPC: B22C9/02 ,  B22C9/10 ,  B22D27/15 ,  B22D18/06

CPC classification number: B22D18/06 ,  B22C9/02 ,  B22C9/103 ,  B22C9/106 ,  B22D27/15

Abstract: Methods, systems, and apparatus for reduction of gas pressure within a core, such as a sand casting core package, during a casting process in order to reduce bubble defects. Some embodiments may comprise a mold configured to receive a molten metal to create a metal casting, such as an engine block casting. The mold may comprise a mold core configured to create a cavity within the metal casting. The system may further comprise a filling device configured for delivering a molten metal into the mold for creating the metal casting. The mold core may comprise a material that is permeable to certain gases known to often result in bubble defects. The system may further comprise a vacuum configured to be coupled with the mold to reduce gas pressure within a permeable portion of the mold in order to reduce the incidence of bubble defects within the casting.

Abstract translation: 为了减少气泡缺陷，在铸造过程期间降低芯体内的气体压力的方法，系统和装置，例如砂铸芯包装。 一些实施例可以包括被配置为接收熔融金属以形成金属铸件（例如发动机缸体铸件）的模具。 模具可以包括配置成在金属铸件内形成空腔的模芯。 该系统还可以包括填充装置，其被配置为将熔融金属输送到模具中以形成金属铸件。 模芯可以包括对已知通常导致气泡缺陷的某些气体是可渗透的材料。 该系统还可以包括被配置为与模具联接以减小模具的可渗透部分内的气体压力的真空，以便减少铸件内的气泡缺陷的发生。