| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a light impeller having a high performance with a good productivity by constituting a blade shape part of an impeller for an air blower in a double layer structure, and forming at least one layer with a foam forming body. SOLUTION: An impeller 2 for an air blower is positioned on a center part of a main body of an exterior apparatus, and is fixed to a bolt of a fan motor by a nut. In the case where the impeller 2 is manufactured, for example, AES (acrylic/EPDM/styrene) including glass fiber is used, and it is injection-molded. The impeller 2 is composed of a hub 5 positioned on a center and three blade shape parts 6 which are contrifugally rotated, and a side surface roughness as an atmosphere separation surface of the blade shaped part 6 is set to Ra50 μm. A foam molding AES 8 formed by molding AES to which micro capsule expanding agent having thermal expansion property is added, with foam by 1.5 of a foam magnification, is directly joined with an injection molding AES 7, and the blade shape part 6 is thickened. The atmosphere separation surface is an upper surface of the blade shape part (an impeller) 6 wherein an arrow direction is set as a rotational direction. |
