Ordliste
Clamping force — definition
The force with which the casting machine holds the die closed, measured in tonnes — it sets the hard limit on how large the part can be.
When the melt is injected into the die, the pressure acts outwards and tries to push the die halves apart. Clamping force is the counterforce.
The clamping force required follows from the projected area of the part — the area it covers seen along the closing direction, including gates and overflows — multiplied by the casting pressure. If the clamping force is too low for that, the die opens slightly during the shot and you get flash in the parting line.
This is why it is the first figure a technical buyer asks for: clamping force determines which parts a foundry can make at all.