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。

公开(公告)号：US20150202685A1

公开(公告)日：2015-07-23

申请号：US14159866

申请日：2014-01-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David D. Goettsch ,  Brad A. Ohlrich

IPC: B22D41/04 ,  B22D17/00 ,  B22D17/30

CPC classification number: B22D41/04 ,  B22D17/00 ,  B22D17/2023 ,  B22D17/30

Abstract: A method for delivering molten metal from a ladle to a die casting shot sleeve and a ladle and shot sleeve assembly. Both the ladle and a rotatable device coupled to the shot sleeve are made to rotate about respective axes as a way to reduce air entrainment and oxide film inclusions during the gravity filling of the shot sleeve with molten metal from the ladle. In a preferred form, the axis of rotation of the nozzle in the ladle is orthogonal to the axis of rotation of the shot sleeve rotatable device that is preferably placed in a horizontal filling direction. The nozzle is configured to deliver the molten metal through the lowest level of the shot sleeve when the ladle is rotated from a first position to a second position about its axis, followed by its rotation about a filling axis of the shot sleeve from a first angular position to a second angular position. At the second angular position, a die casting plunger can fill the casting cavity with the molten metal that has been delivered to the shot sleeve.

Abstract translation: 一种用于将熔融金属从钢包输送到压铸弹丸套筒以及钢包和喷射套筒组件的方法。 钢包和耦合到喷射套筒的可旋转装置被制成围绕各个轴线旋转，作为在来自钢包的熔融金属的喷射套筒的重力填充期间减少气流夹带和氧化膜夹杂物的一种方式。 在优选形式中，浇包中的喷嘴的旋转轴线与喷射套筒可旋转装置的旋转轴线正交，该旋转轴线优选地设置在水平填充方向。 喷嘴被构造成当钢包从第一位置绕其轴线旋转到第二位置时，将熔融金属输送通过喷射套筒的最低水平，随后围绕喷射套筒的填充轴线从第一角度 位置到第二个角位置。 在第二角位置，压铸柱塞可以将已经输送到喷射套筒的熔融金属填充到铸造腔中。