• A toggle is mechanically device to amplify force.
• In a moulding machine, which consists of two bars joined, together end to end with a pivot .
• The end of one bar is attached to a stationary platen, and the other end of a second bar is attached to the movable platen.
• When the mould is open, the toggle is in the shape of a V.
• When pressure is applied to the pivot, the two bars form a straight line.