Combination of split bodies for use in assembling blower fan by hollow article molding process

摘要

The present invention is directed to split bodies for assembling a synthetic resin blower fan by a hollow article molding process. The split bodies have a first split body which includes a circular base portion and vanes extending radially and a second split body assembled on top of said first split body and is in a doughnut-shaped cap with an air inlet at the center thereof. Air channels are formed between adjacent pair of the vanes. The second split body includes a plurality of grooves which are formed on an inner surface opposite from the first split body in an assembled state. Each of the grooves extends radially along an edge of a corresponding vane and is adapted to be closed by the edge so as to define a flow path for allowing a molten synthetic resin to pass therethrough. The second split body further includes an injection hole which is in fluid communication with an upstream end of the flow path with respect to the flow direction of the molten synthetic resin to be injected so as to allow the molten synthetic resin to be injected into the flow path therethrough.