发明名称 |
SUBSURFACE CHILLS TO IMPROVE RAILCAR KNUCKLE FORMATION |
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. |
申请公布号 |
WO2013096161(A3) |
申请公布日期 |
2013.12.27 |
申请号 |
WO2012US70012 |
申请日期 |
2012.12.17 |
申请人 |
BEDLOE INDUSTRIES LLC |
发明人 |
SMERECKY, JERRY, R.;NIBOUAR, ANDREW, F.;BROOKS, NOLAND;SALAMASICK, NICK |
分类号 |
B22C9/02;B22D15/00;B22D27/04;B61G3/06 |
主分类号 |
B22C9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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