Injection mold of cast aluminum of motor rotor

The invention discloses an injection mold of cast aluminum of a motor rotor. The injection mold of the cast aluminum of the motor rotor comprises a mold base structure and an injection structure, wherein the mold base structure at least comprises an outer mold base and a hollow column-shaped inner mold sleeve; the inner mold sleeve is arranged in the outer mold base in a matched mode, and the material of the outer mold base is close to the linear expansion coefficient of the material of the inner mold sleeve; and the injection structure at least comprises an injection head, and the injection head is installed in the inner mold sleeve in a matched mode; and the injection head and the inner mold sleeve cooperates with each other in a matched mode to form an injection cavity for accommodatinghot melt aluminum liquid for injection. According to the mold, the inner mold sleeve and the outer mold base structure similar in linear expansion coefficient are adopted, so that a traditional asbestos cup is omitted while