| 摘要 |
<p>A method for coating a rotor (1) of a permanent magnet electric motor (4) for a household appliance pump with plastic material, for making it airtight with respect to the external fluids, said rotor (1) comprising a rotor core (3) with permanent magnets (4) and a motion transmission shaft (5), said method comprising the insertion of the components (3, 4, 5) of the rotor (1) in a mould (22) with an extraction side half-mould (23) and one on the injection side (24) provided with pins (26, 40 and 32, 42) for centring and supporting such components. During moulding, detachment and recession of the pins (26, 32, 40, 42) of the two half-moulds (23, 24) are provided for, at different times without interrupting the injection so that the material encloses such components and entirely covers them with a continuous and homogeneous layer of plastic material. The rotor thus obtained is also claimed.</p> |
