公开(公告)号：US20080257515A1

公开(公告)日：2008-10-23

申请号：US11661023

申请日：2005-08-25

申请人： Martin Zoldan

发明人： Martin Zoldan

IPC分类号： B22C9/10 ,  B29C33/00

CPC分类号： B22C9/106

摘要： Provided are methods of replacing drilling holes in castings by pre-tensioning sand cores. This methods are used in long cylindrical shaped sand cores in cold core box processes. The urethane sand core is placed in compression to increase the core strength during handling, placing inside of the mold. The pre-tensioned urethane sand core is set in a casting mold so as to form a cavity in the casting mold. The molten metal is poured to form the cavity inside of the casting. The pre-tensioned urethane sand core maintains its initial shape during casting.

摘要翻译： 提供了通过预张紧砂芯来更换铸件中的钻孔的方法。 这种方法用于冷芯盒工艺中的长圆柱形砂芯。 将聚氨酯砂芯放置在压缩状态，以增加处理过程中的芯强度，放置在模具内部。 将预拉伸的聚氨酯砂芯设置在铸模中，以在铸模中形成空腔。 浇注熔融金属以在铸件内部形成空腔。 预拉伸的聚氨酯砂芯在铸造过程中保持其初始形状。

公开(公告)号：US08397789B2

公开(公告)日：2013-03-19

申请号：US11661023

申请日：2005-08-25

申请人： Martin Zoldan

发明人： Martin Zoldan

IPC分类号： B22C9/10

CPC分类号： B22C9/106

摘要： Provided are methods of replacing drilling holes in castings by pre-tensioning sand cores. These methods are used in long cylindrical shaped sand cores in cold core box processes. The urethane sand core is placed in compression to increase the core strength during handling, placing inside of the mold. The pre-tensioned urethane sand core is set in a casting mold so as to form a cavity in the casting mold. The molten metal is poured to form the cavity inside of the casting. The pre-tensioned urethane sand core maintains its initial shape during casting.

摘要翻译： 提供了通过预张紧砂芯来更换铸件中的钻孔的方法。 这些方法用于冷芯盒工艺中的长圆柱形砂芯。 将聚氨酯砂芯放置在压缩状态，以增加处理过程中的芯强度，放置在模具内部。 将预拉伸的聚氨酯砂芯设置在铸模中，以在铸模中形成空腔。 浇注熔融金属以在铸件内部形成空腔。 预拉伸的聚氨酯砂芯在铸造过程中保持其初始形状。