| 摘要 |
Method for producing a tube section (6) from thermoplastic material, in whic h a tube section (6) is extruded by means of an extruder (1) which is provided with an extruder die (3) having an inner core (5), which inner core (5) defines an axial hollow space in the tube section (6), the tube section comi ng out of the extruder die (3) downstream of the extruder die (3) being internally cooled by means of an internal cooling member and externally cool ed by means of an external cooling device. Immediately after the tube section ( 6) leaves the extruder die (3), the internal cooling member brings about intern al cooling of the tube. The external cooling device (15) is positioned downstre am of the internal cooling member, so that the external cooling of the tube section is brought about after the internal cooling. |
