Toyota Jidosha Kabushiki Kaisha

Susumu Yamada

Takao Nomura

Masahito Ito

Hiroshi Sarai

Fuminori Matsuda

Miyuki Koujiya

Seiya Nakao

Kesato Kuroiwa

Satoru Kitou

Hiroshi Mihara

A method of producing a metal mold is disclosed. A heat resistant sheet is forcedly brought into close contact with a product configuration surface of a matrix such as a wooden pattern, a resin model, or the like by making use of negative pressure. The matrix is brought into contact with a melt of a low melting-point alloy while that state of close contact is being maintained and the melt is allowed to cool as it is, thereby casting one part of the mold which makes up a pair. The matrix is then removed, and by using the one part of the mold thus cast as a new matrix, this new matrix is brought into contact with the melt of a low melting-point alloy via the heat resistant rubber sheet and is allowed to cool as it is, thereby casting a counterpart of the mold that makes up the pair.

Method of producing a metal mold

Growing community of inventors

Toyota, Japan

Susumu Yamada