| 摘要 |
Extruder die for extrusion of hollow profiles. A matrix 20, which encloses a mandrel 15, is arranged to be axially adjustable in an adjusting collar 17 relative to a part 15' of the mandrel which tapers towards the mouth of the die. The adjusting collar can be adjusted in the mandrel's transverse direction and is fixed in position by means of two pairs of pressure devices 32 arranged opposite each other, operating in the mandrel's tranverse direction, with one pair placed basically at right angles to the other pair. Each of the pressure devices can be moved in the mandrel's transverse direction by means of a stepping motor 27A, 27B, 27C, 27D functionally connected to the pressure device. <IMAGE> |
