| 摘要 |
A process for the injection of an electric motor rotor, said rotor comprising: a lamination stack ( 10 ) having a central axial bore ( 11 ) and a plurality of axial channels ( 12 ); and a cage ( 30 ) of aluminum, which is formed by an upper end ring ( 31 ) and a lower end ring ( 32 ), which are interconnected by a plurality of bars ( 33 ) molten in the axial channels ( 12 ). The process comprises the steps of: mounting, at the upper end portion of the central axial bore ( 11 ), a stamping pin ( 40 ), which has a widened head ( 41 ) seated against the upper end lamination of the lamination stack ( 10 ); heating the lamination stack, as well as an upper cavity ( 21 ) and a lower cavity ( 22 ) of a mold ( 20 ); positioning the lamination stack ( 10 ) inside the mold ( 20 ); rotating the mold ( 20 ) and pouring the aluminum into the inside thereof through the inlet channel ( 23 ); removing, from the mold ( 20 ), the rotor (R) with the cage ( 30 ) already formed and comprising an upper plate ( 35 ) that covers the stamping pin ( 40 ); and axially extracting the stamping pin ( 40 ) in order to break, centrally, the upper plate ( 35 ), transforming it in the upper ring ( 31 ) of the cage ( 30 ). |
