The shuttle production line consists of a furnace with the desired dimensions in the center and two wagons on either side. Typically, one wagon is designed as a straight (STRAIGHT) type, while the other is designed as a cradle (C) or L-shaped (L) type.
Shuttle machines can also be produced with 4 arms. Straight wagons are chosen for installing multiple smaller molds on frames, while C and L wagons are selected for larger molds or molds with asymmetric dimensions.