CENTRIFUGAL IMPELLER AND MANUFACTURING METHOD OF CENTRIFUGAL IMPELLER

To efficiently and inexpensively manufacture a centrifugal impeller having a circular main plate, a cylindrical hub protruding from the circular main plate, and a torsion portion at the hub side, and also having a plurality of blade parts protruding from the circular main plate and the hub to one side in an axial direction while having a highly-efficient three-dimensional shape.SOLUTION: A resin-made interpolation member 36 in which notched holes 42 are formed at a resin-made blade main body 35 having a circular main plate 39, a hub 40 and blade parts 41, and which has interpolation parts 44 for filling the notched holes 42, and a resin-made front face plate 37 abut on each other from both sides of the blade main body 35, fusion boss parts 51 formed at the circular main plate 39 and the blade part 41, and filling the notched parts 50 which are opened at an external periphery of the circular main plate 39 protrude to the front face plate 37 side, and integrated with the interpolation member 36, and tip parts of the fusion boss parts 51 which are mildly fit into recesses 53 formed at the front face plate 37 are fused to the recesses 53.SELECTED DRAWING: Figure 3 【課題】円形主板と、円形主板から突出する筒状のハブと、捩じり部分をハブ側の端部に有して円形主板およびハブから軸方向一側に突出する複数の羽根部とを備える遠心羽根車において、高効率な三次元形状を有しつつ効率よく低コストで製造可能とする。【解決手段】円形主板３９、ハブ４０および記羽根部４１を有する樹脂製の羽根車本体３５に切り抜き孔４２が形成され、切り抜き孔４２を埋める補間部４４を有する樹脂製の補間部材３６と、樹脂製の前面プレート３７とが羽根車本体３５に両側から当接され、円形主板３９および羽根部４１に形成されて円形主板３９の外周に開口する切欠き部５０を埋める溶着ボス部５１が前面プレート３７側に突出して補間部材３６に一体に突設され、前面プレート３７に形成される凹部５３に緩く嵌合される溶着ボス部５１の先端部が凹部５３に溶着される。【選択図】 図３