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1. 发明申请

US20090260774A1 SACRIFICIAL SLEEVES FOR DIE CASTING ALUMINUM ALLOYS 有权
标题翻译：用于铝合金铸造的特殊工具
公开(公告)号：US20090260774A1
公开(公告)日：2009-10-22
申请号：US12103755
申请日：2008-04-16
申请人： Jongcheol Shin , Jongwon B. Park , Inwook Hwang , Bob R. Powell, JR. , Thomas A. Perry , Anil K. Sachdev , Jon T. Carter
发明人： Jongcheol Shin , Jongwon B. Park , Inwook Hwang , Bob R. Powell, JR. , Thomas A. Perry , Anil K. Sachdev , Jon T. Carter
IPC分类号： B22D29/00
CPC分类号： B22D15/02 , B22D19/0009 , B22D21/04
摘要： Some die cast aluminum alloy articles have internal cylindrical surfaces such as the round internal cylinder surfaces of a cylinder block for an internal combustion engine. During casting solidification molten aluminum alloys shrink against the metallic permanent mold tools used to mold and define such internal surfaces, and tend to stick to the tool surfaces making it difficult to remove the casting. The tendency of some aluminum casting alloys to solder to the tool can further intensify sticking. In this invention, an aluminum alloy sleeve is placed on and over the tool surface before casting and the sleeve isolates the tool from the molten aluminum. The sleeve becomes bonded to the casting and facilitates removal of the casting from the tool. The sleeve may be (and preferably is) fully machined from the internal casting surface. The sleeve may be of the same composition as the casting, in which case handling and recycling of machining chips would be facilitated. The practice of the invention is also applicable to die casting of magnesium alloys using magnesium sacrificial sleeves.
摘要翻译：一些压铸铝合金制品具有诸如用于内燃机的气缸体的圆形内圆柱表面的内圆柱表面。在铸造凝固期间，熔融铝合金收缩用于模制和限定这种内表面的金属永久模具，并且倾向于粘附到工具表面，使得难以移除铸件。一些铝铸造合金焊接到工具的趋势可以进一步加剧粘附。在本发明中，铝合金套筒在铸造之前放置在工具表面上和上方，并且套筒将工具与熔融铝隔离开。套筒粘合到铸件上并便于从工具中移除铸件。套筒可以（并且优选地）从内部铸造表面完全加工。套筒可以具有与铸件相同的组成，在这种情况下，加工芯片的处理和回收将被促进。本发明的实践也适用于使用镁牺牲套管的镁合金压铸。

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