Nissan Motor Company Limited

Masahito Fujikawa

Naoki Okamoto

Hidenobu Matsuyama

Eiji Shiotani

Yoshitsugu Noshi

Hirohisa Shibayama

Koukichi Kamada

Junichi Hamasaki

Masatoshi Inoguchi

The nozzle for cold spray () used in a cold spray apparatus () is configured to include a tubular nozzle main body () and a cooling jacket () that surrounds the nozzle main body () to form a flow path () for refrigerant (R) between the nozzle main body () and the cooling jacket (). The cooling jacket () is provided with a seal retaining portion () that retains an O-ring () for the flow path (). The seal retaining portion () and the nozzle main body () are joined in a socket-and-spigot joint fashion.

Cold spray nozzle and cold spray device

When forming valve seat coats at opening portions (to) of intake ports () provided at a cylinder block mounting surface () of a semimanufactured cylinder head (), the nozzle of a cold spray apparatus moves along a nozzle movement path for air intake (Inp) that is set between any two of the plurality of opening portions (to), while continuing to spray a raw material powder. When forming valve seat coats at opening portions (to) of exhaust ports (), the nozzle moves along a nozzle movement path for air exhaust (Enp) that is set between any two of the plurality of opening portions (to), while continuing to spray the raw material powder.

Coating method

Growing community of inventors

Kanagawa, Japan

Masahito Fujikawa