The invention relates to a shaping apparatus for an extrusion system with
at least one calibration die having a plurality of calibration units (31)
disposed one after the other, having a calibration orifice (38) with a
plurality of shaping surfaces (39 to 42) which come into contact with an
article (6) fed therethrough, and end faces (43) spaced apart from one
another with side faces (45 to 48) extending between them. At least one
cavity is provided between at least two immediately adjacent calibration
units (31). The calibration die is provided with means for dispersing
heat. The calibration orifice (38) is provided with at least one
continuous circulation passage (67) around a predominant part of and
immediately adjacent to its circumference, having a separate inlet and
outlet line (68, 69). The circulation passage (67) extends across a
predominant distance of a thickness between the end faces (43) of the
calibration unit (31), the circulation passage (67) being closed in the
region of the two end faces (43).
