To attain a thick shape without any shrinkage in a wing-shaped blade part by involving a plurality of wing-shaped blades around a hub, jointing the whole body of a hub to the inside of a blade by means of a hollow structure for forming a non-foamed part, and filling the hollow part of the non-foamed part with resin foam for forming a foamed part.
This impeller 1 for a blower is formed by attaching a plurality of wing-shaped blades 3 onto the circumference of a circular-shaped hub 2 with a motor shaft fixed to a boss 4 in the center. In manufacturing the impeller 1, the whole body of the hub 2 and the inside of the blades 3 are jointed by means of a hollow structure to form a non-foamed part 101 and the hollow part thereof is filled with resin foam to form a foamed part 102. The non- foamed part is formed out of any one of the synthetic resin materials of polypropylene resin, styrene-acrylonitrile resin, acrylonitrile-ethylene-propylene- diene-styrene resin, and acrylonitrile-styrene-acrylic acid-ester resin.
NUMAMOTO HIRONAO
SATO NARIHIRO
SUGIO TAKASHI
IZUMI YOSHIKI
| JPS475911Y1 | 1972-02-29 | |||
| JPH09126184A | 1997-05-13 | |||
| JPH10213091A | 1998-08-11 | |||
| JPH02221699A | 1990-09-04 | |||
| JPS61215498A | 1986-09-25 | |||
| JPH0797931A | 1995-04-11 | |||
| JPH1110718A | 1999-01-19 | |||
| JPH09286079A | 1997-11-04 |