| 摘要 |
The present invention relates to a manufacturing method of an impeller rotor assembly, and more specifically, to a manufacturing method of an impeller rotor assembly. The method forms a fine space between a magnet of a rotor and a yoke to support the magnet when manufacturing a rotor assembly integrated with an impeller to prevent a crack defect on the inside and the outside of the magnet, which can be caused by a sudden temperature change when a high-temperature melted resin is injected into a mold. The manufacturing method of an impeller rotor assembly according to the present invention comprises: a first step of manufacturing a hollow cylindrical magnet; a second step of manufacturing a magnet yoke which is assembled on the inner circumferential surface of the magnet and formed in a hollow cylindrical shape, and whose outer diameter is 0.02 to 0.3 mm smaller than the inner diameter of the magnet; a third step of assembling the magnet and the magnet yoke; and a fourth step of mounting an assembly of the magnet and the magnet yoke in a mold to shape the assembly. The manufacturing method of an impeller rotor assembly according to the present invention can prevent a surface defect of the magnet, which can be easily caused by a temperature difference between the inside and the outside of the magnet when cooling a high-temperature plastic resin injected into the mold to manufacture the impeller rotor assembly. |
