公开(公告)号：US4875519A

公开(公告)日：1989-10-24

申请号：US185436

申请日：1988-04-25

申请人： Yoh Ishii ,  Masami Abe ,  Yuhzoh Harada ,  Atsumi Takasugi ,  Kazumi Kato

发明人： Yoh Ishii ,  Masami Abe ,  Yuhzoh Harada ,  Atsumi Takasugi ,  Kazumi Kato

IPC分类号： B22D11/00 ,  B22D11/04 ,  B22D11/041 ,  B22D11/049

CPC分类号： B22D11/006

摘要： A method and apparatus utilizing a core is located at a central portion of a molten metal storing portion in a vertical semi-continuous mold. The molten metal is poured into the molten metal storing portion, and casting takes place with the inner diameter of a solidified distal portion of the molten metal being controlled by a distal portion of the core. This approach provides a reliable method for the manufacture of high-quality hollow billets which are free from internal defects.

公开(公告)号：US4967583A

公开(公告)日：1990-11-06

申请号：US423585

申请日：1989-10-17

申请人： Toshio Watanabe ,  Atsumi Takasugi ,  Kazumi Kato ,  Hirokazu Yamaguchi

发明人： Toshio Watanabe ,  Atsumi Takasugi ,  Kazumi Kato ,  Hirokazu Yamaguchi

IPC分类号： B21C23/08 ,  B21C25/04

CPC分类号： B21C23/085 ,  B21C25/04

摘要： A method of manufacturing extruded seamless hollow materials characterized in that, prior to extruding a hollow billet from container liner through extrusion dies, a process wherein a centering jig for holding the tip portion of mandrel at the center of extrusion is provided on the extruding side or in the extrusion dies on the extruding side of the container liner, a process wherein the tip portion of mandrel is inserted into the centering jig to be held and a process wherein the hollow billet is pressurized to fill up said billet in the container liner are included.

摘要翻译： 一种制造挤出无缝中空材料的方法，其特征在于，在从容器衬里挤出中空坯料通过挤出模头之前，将其中将心轴的尖端部分保持在挤出中心处的中心夹具设置在挤出侧或 在容器衬里的挤出侧的挤出模具中，包括将心轴的尖端部分插入要保持的定心夹具中的方法以及其中中空坯料被加压以填充容器衬里中的所述坯料的方法 。