Extruder for hollow profiles made from thermoplastics comprises extruder head fitted with mandrel and calibration, mandrel containing turbulence chamber with cold air outlet which connects with cooling pipe extending into calibration unit

摘要

Extruder for hollow profiles made from thermoplastics comprises an extruder head (3) fitted with a mandrel (22) and a calibration unit (9). The mandrel contains a turbulence chamber (23) with a cold air outlet (25) which connects with a cooling pipe (33) extending into the calibration unit and terminating in a second outlet (34).