Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Other

Ryuuichi Masuda

Masahiro Taguchi

Akihiko Suda

Hiroaki Hayashi

Yasuo Takada

Takatoshi Suzuki

Yuji Sakakibara

Yoshiro Hayashi

Kenji Kaida

Kaoru Sugita

Noriyuki Ueno

Takehito Kobayashi

Hiroyuki Urusidani

Tomokazu Sawada

Haruyuki Sakabe

A hot-top is disclosed that continuously casts an ingot by pouring molten metal down into a cylindrical space in a continuous casting mold from a molten metal flow-down port. The inner shape of a flow-down port forming part corresponds to the inner shape of a cylindrical space forming part. The hot-top forms an annular groove about the molten metal flow-down port, and has a barrier between the annular groove and the flow-down port.

Hot-top for continuous casting and method of continuous casting

The first suction port is formed between a side die and the peripheral protrusion of an upper die. A release pin insertion hole is formed at the peripheral protrusion of the upper die which forms the upper end portion of the cavity. A release pin is inserted into the release pin insertion hole. The second suction port is formed between the insertion hole and the pin. Alternatively, a plurality of vent holes having permeable sintered metal arranged are formed instead of the release pin to serve as the second suction port. The suction negative pressure of the second suction port is set higher than that of the first suction port. High negative pressure from the second suction port inhibits air from remaining on the low temperature surface portion of the upper die.

Suction casting method and suction casting apparatus

A mold comprising a cavity for defining the shape of a casting and a mold body for forming said cavity, comprising: a mold body formed of an ordinary temperature setting resin or thermosetting resin and casting sand, said mold body having a surface layer portion on the surfaces thereof including depressions, said depressions in the surface layer portion being filled up with at least one porous powdered material selected from the group consisting of hydrous magnesium silicate clay mineral, activated carbon and activated alumina, thereby providing the mold body with smooth surfaces whereby said mold generates less amount of material such as gums which cause defective castings during casting since molten metal is restrained from intruding into the walls of said mold.

Mold surface treatment process and mold

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.

Growing community of inventors

Okazaki, Japan

Ryuuichi Masuda