Title:
予備張力をかけた砂中子
Document Type and Number:
Japanese Patent JP4567739
Kind Code:
B2
Abstract:
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.
More Like This:
Inventors:
ZOLDAN,Martin
Application Number:
JP2007530159A
Publication Date:
October 20, 2010
Filing Date:
August 25, 2005
Export Citation:
Assignee:
ZOLDAN,Martin
International Classes:
B22C9/10
Domestic Patent References:
| JP55097844A | ||||
| JP1218736A |
Attorney, Agent or Firm:
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Kazuhiro Oyaku
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Kazuhiro Oyaku