公开(公告)号：US20160193654A1

公开(公告)日：2016-07-07

申请号：US15069576

申请日：2016-03-14

申请人： Bedloe Industries LLC

发明人： Jerry R. Smerecky ,  F. Andrew Nibouar ,  Noland Brooks ,  Nick Salamasick

IPC分类号： B22D25/02 ,  B22D35/04 ,  B22C13/02 ,  B22C9/10 ,  B22C9/08 ,  B22C9/06 ,  B22D15/04 ,  B22C7/04

CPC分类号： B22D15/04 ,  B22C7/04 ,  B22C9/02 ,  B22C9/062 ,  B22C9/064 ,  B22C9/065 ,  B22C9/08 ,  B22C9/082 ,  B22C9/088 ,  B22C9/10 ,  B22C9/101 ,  B22C9/103 ,  B22C9/22 ,  B22C13/02 ,  B22D15/00 ,  B22D25/02 ,  B22D35/04 ,  B61G3/04 ,  B61G7/00

摘要： A method for manufacturing a railcar coupler knuckle includes, before casting, positioning an external chill within a cope mold portion and a drag mold portion offset from and adjacent internal walls of a pulling face and a throat of the cope and drag mold portions, thus producing a casting with reduced micro-shrinkage in at least the throat, a high-stress section of the casting. Use of subsurface chills produces an improved surface with fewer inclusions when compared to an equivalent surface produced in a process without use of a subsurface chill. The external chill may be a cone chill of a larger size to improve cooling and solidification at and below the surface. The external chill may also be a cylindrical and/or oblong chill with a tapered design that may correspond to the internal walls of the cope and drag mold portions between the pulling face and the throat.

公开(公告)号：US20160207103A1

公开(公告)日：2016-07-21

申请号：US15057855

申请日：2016-03-01

申请人： Bedloe Industries LLC

发明人： Jerry R. Smerecky ,  F. Andrew Nibouar ,  Noland Brooks ,  Nick Salamasick

IPC分类号： B22D15/04 ,  B61G7/00 ,  B22C9/08 ,  B22C7/04 ,  B22C9/10 ,  B22C9/22

CPC分类号： B22D15/04 ,  B22C7/04 ,  B22C9/02 ,  B22C9/062 ,  B22C9/064 ,  B22C9/065 ,  B22C9/08 ,  B22C9/082 ,  B22C9/088 ,  B22C9/10 ,  B22C9/101 ,  B22C9/103 ,  B22C9/22 ,  B22C13/02 ,  B22D15/00 ,  B22D25/02 ,  B22D35/04 ,  B61G3/04 ,  B61G7/00

摘要： A method for manufacturing a railcar coupler knuckle includes, before casting, positioning an external chill within a cope mold portion and a drag mold portion offset from and adjacent internal walls of a pulling face and a throat of the cope and drag mold portions, thus producing a casting with reduced micro-shrinkage in at least the throat, a high-stress section of the casting. Use of subsurface chills produces an improved surface with fewer inclusions when compared to an equivalent surface produced in a process without use of a subsurface chill. The external chill may be a cone chill of a larger size to improve cooling and solidification at and below the surface. The external chill may also be a cylindrical and/or oblong chill with a tapered design that may correspond to the internal walls of the cope and drag mold portions between the pulling face and the throat.