To consider the direction of enhancing fiber and to provide a fan made of plastic which can raise mechanical strength in a weld portion.
In a periphery 16a of a cylindrical rib 16, radiation shape ribs 18, 18 which adjoin mutually form projections 30 in intermediate portions of a portion connected to this cylindrical rib 16, the cylindrical rib 16 is formed so that the radial thickness T thereof may gradually become small from a stem 16c toward a head end 16d side, further the height H1 of the cylindrical rib 16 is set so as to be higher than the height H2 of the radiation shape rib 18, thereby the stream of plastic in the cylindrical rib 16 or in the portion of the projections 30 is complicated at the time of molding, and the orientation of glass fiber intermingled in plastic is complicated in this way.
HIMENO HIROMITSU
SUZUKI ATSUSHI
KOBAYASHI TAKAYUKI
OKAMOTO KIMIHIKO
| JP2007285135A | 2007-11-01 | |||
| JP2005313640A | 2005-11-10 | |||
| JP2005054722A | 2005-03-03 |
Horikawa Miyuki
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