| 摘要 |
The present invention relates to a method for manufacturing an impeller rotor assembly, and more specifically to a technique, when manufacturing a rotor assembly that is integrally formed with an impeller, that forms a very small space between a magnet of the rotor and a yoke for supporting the magnet, and thereby prevents internal and external crack defects of the magnet that could occur due to drastic temperature changes during injection moulding of a high temperature molten resin. The method for manufacturing an impeller rotor assembly according to the present invention comprises: step 1 of manufacturing a cylindrical magnet in which a hollow is formed; step 2 of manufacturing a magnet yoke that is assembled in an inner circumferential surface of a magnet, that has a cylindrical shape in which a hollow is formed, and that compared to the inner diameter of the magnet, has an outer diameter formed 0.02-0.3 mm smaller than the inner diameter of the magnet; step 3 of assembling the magnet and the magnet yoke; and step 4 of moulding by coupling the assembly of the magnet and the magnet yoke to a mould. The method for manufacturing an impeller rotor assembly according to the present invention has the effect that it can prevent surface defects of the magnet that are prone to occur due to the difference between the internal temperature and the external temperature of the magnet when cooling after injection moulding of a high temperature plastic resin during the manufacture of the impeller rotor assembly. |
