公开(公告)号：US4934440A

公开(公告)日：1990-06-19

申请号：US238848

申请日：1988-09-01

申请人： Yuji Sakakibara ,  Takatoshi Suzuki ,  Hiroaki Hayashi ,  Yasuo Takada ,  Akihiko Suda ,  Yoshiro Hayashi ,  Kenji Kaida ,  Ryuuichi Masuda ,  Masahiro Taguchi

发明人： Yuji Sakakibara ,  Takatoshi Suzuki ,  Hiroaki Hayashi ,  Yasuo Takada ,  Akihiko Suda ,  Yoshiro Hayashi ,  Kenji Kaida ,  Ryuuichi Masuda ,  Masahiro Taguchi

IPC分类号： B22C9/18

CPC分类号： B22C23/02 ,  B22C3/00 ,  B05C19/02

摘要： A mold surface treatment process comprises: providing a fluidized bed of a treating powder; holding the mold in the fluidized bed to fill up the depressions of the mold surfaces with the treating powder by employing a surface treating member for pushing the treating powder into the depressions; and taking the mold out of the fluidized bed. The mold surface treatment allows to make molten metal less likely penetrate into the walls of mold, and to manufacture a mold which generates less amount of gum causing defects during casting.