Heat-insulated port liner arrangement and method of fabrication
AssigneeNgk Spark Plug Co., Ltd.
InventorsYoshinori Narita, Takashi Kato
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Abstract
A heat-insulated port liner arrangement for a device composed of a cast metal which is molded around the arrangement and includes a tubular port liner composed of a material including a ceramic, a first covering layer disposed on the outer surface of the liner and composed of a material including refractory fibers, and a second covering layer disposed on the outer surface of the first covering layer and composed of a material including a metal having a melting point not lower than the melting point of the cast metal.
Claims5
A multi layered heat-insulated port liner for a device composed of a cast metal which is molded around the port liner comprising:
- a tubular port liner, said liner composed of a material including a ceramic and having a radially outwardly extending surface;
- a first covering layer, said first covering layer disposed on the radially outwardly extending surface of the liner and composed of a material including refractory fibers, said first covering layer having a radially outwardly extending surface;
- and
- a second covering layer, said second covering layer disposed on the radially outwardly extending surface of the first covering layer and composed of a material including a metal having a melting point not lower than the melting point of the cast metal.
A method for making a multi-layered heat-insulated port liner for a device composed of a cast metal comprising:
- forming a tubular port liner composed of a material including a ceramic;
- covering the outer surface of the liner with a first covering composed of a material including refractory fibers;
- covering the outer surface of the first covering layer with a second covering layer composed of a material including a metal having a melting point not lower than the melting point of the cast metal.
Dependencies are inferred from the claim text.