A vertical rotor die-casting machine is designed specifically for producing motor rotors by injecting molten aluminum or copper into a vertically positioned mold. Its working principle can be summarized in the following stages:
1. Vertical Mold Clamping
The machine uses a vertical clamping structure.
The mold halves open and close vertically.
A high clamping force ensures precise alignment and prevents flashing.
The rotor stack or core is positioned inside the mold cavity before casting.
2. Automated Core Loading (Optional)
For induction motor rotors:
Laminated steel stacks and shaft cores are automatically or manually placed into the mold.
The system ensures accurate positioning to maintain uniform end-ring thickness.
3. Melting and Injection
Molten aluminum or copper is prepared in a furnace connected to the machine.
The injection unit injects molten metal from the bottom or side directly into the mold cavity.
High pressure and controlled injection speed ensure proper metal filling and eliminate porosity.
Vertical injection minimizes turbulence in the molten metal and enhances rotor quality.
4. Solidification and Cooling
Once the cavity is filled:
The molten metal solidifies around the rotor laminations to form the conductor bars and end rings.
Cooling channels or forced-air systems help control cooling time and improve efficiency.
Proper cooling ensures dimensional accuracy and uniform rotor conductivity.
5. Mold Opening and Rotor Extraction
After solidification is complete:
The mold opens vertically.
An ejector system or robot removes the finished rotor.
The cycle repeats for continuous production.