References
References
SIA KMM METALS, Riga, Letonija, Control System of Vertical Downward Casting Machine for Solid and Hollow Profiles of Bronze


Control System of Vertical Downward Casting Machine for Solid and Hollow Profiles of BronzeOn machines for vertical downward casting of solid and hollow profiles of bronze, that are older than thirty years, the existing hydraulic mechanism with traction rollers has been replaced with an AC servo motor with brake of 4.4 KW power.
The maximum outside diameter of profile being cast is 65 mm, the minimal wall thickness of hollow profiles is 3.5 mm. Extrusion of cast profile is performed cyclically: movement-pause. The movement is defined as the angle of rotation of the traction roller expressed in mm that the cast profile will achieve in rectilinear movement and the pause in seconds and parts of seconds. The system this way selected enables movement of 8 times per second with step of 21 mm, while parameter adjustment can be performed during casting, without stopping the machine itself.

Besides the motor operation control, the system includes:

  • temperature measurement in the casting pot and the operating control for the burner that warms up the
  • casting pot with fuel flow measurement,
  • water flow and temperature measurement (input - output) of crystallizer,
  • Control System of Vertical Downward Casting Machine for Solid and Hollow Profiles of Bronzesurface temperature measurement of cast profile.

For easier machine manipulation and technology monitoring with corrections while operating, it is thought out:

  • the existence of so called knowledge base, i.e. specific cast profile will have recommended casting parameters (step, pause, ...)
  • as well as data archiving important for casting during 24h (selected profile, casting speed, temperature, quantity of cast profile in kilograms,...).

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