Coiler spindle for winding a band-type product and its use

A coiler spindle comprising at least one spindle limited by a substantially cylindrical surface for winding a band-type product, centered on an axis and having a variable diameter, the spindle comprising a central shaft brought into rotation around the axis, a set of adjacent segments surrounding the shaft and brought into rotation together with the shaft, each segment being mounted to slide radially on the central shaft and comprising a curved plate having an external face in the shape of a cylindrical sector, means to control the expansion or the retraction of the diameter of the spindle by radial displacement of the segments and means for cooling the spindle by circulation of a heat exchanger fluid along each segment, wherein the cooling means comprise a fluid box fixed to the central shaft and having at least two separate chambers, said chambers including at least one supply chamber connected to a heat exchanger fluid supply system and at least one evacuation chamber connected to a fluid evacuation system;

• each segment having an individual cooling-down system arranged within the curved plate and having two orifices which include an inlet orifice and an outlet orifice for the heat exchanger fluid, each orifice being connected by a ductile connector to one of the chambers of the fluid box, the inlet orifice being connected to the at least one supply chamber and the outlet orifice being connected to the at least one evacuation chamber.