Extrusion International 4-2026

38 Extrusion International 4/2026 EXTRUSION TECHNOLOGIES, PIPE EXTRUSION ers, with the torpedo not being utilised. The ow chan - nel is a well-known design from PVC sheet dies. PVC sheet dies are characterised by their at design. These dies, speci cally designed for pipe multilayer applica - tions, feature a channel that is arranged in a cylindrical con guration, also known as a manifold. It is evident that all heads share similar ow channel geometries and characteristics. The root of the issue is invariably a PVC ow channel. The key bene t of this manifold system is that it allows for straightforward modi cation of the geometry in the event of unexpect - ed layer eccentricity. Each head is available with two or three extruders. Outlook The design and rheological specifications of PVC heads have remained unchanged for quite some time and are still based on the torpedo-tube head principle. The series presented here reects the current state of the art and, thanks to minor modi cations, promises excellent pipe quality. The smooth inner surfaces of the pipes – with no visible web markings – as well as the trouble-free startup and freezing process are particu- larly impressive in this context. It should be noted here that no changes are expected in the near future. By J. Dobrowsky CONEXTRU GmbH Klosterstarsse 19, 3011 Irenental, Austria Dobrowsky.j@conextru.eu Pipehead name PV 63 PV 110 PV 160 PV 250 PV 400 PV 630 PV 800 PV 1000 Dimension range [mm] 16 - 63 16 - 110 63 - 160 110 - 250 110 - 400 160 - 630 160 - 800 400- 1000 160 - 250 160 - 250 250 - 400 400 - 630 400 - 630 630- 800 Min. wall thickness [mm] 1,0 1,8 1,9 1,8 1,8 1,8 1,8 9,1 Max. wallthickness PN 16 [mm] 4,7 8,2 11,9 18,6 29,7 30 38,1 38,1 Max. output kg/h 250 500 700 900 1200 1200 1500 2000 Min. output kg/h 50 150 200 300 400 400 500 500 Max. volumen with RAand die set 6 13 30 45 100 110 110 140 Range adapter use of die sets on next bigger head 16 - 63 63 - 110 110 - 160 110 - 250 250 - 400 Manifold 3D print Table 1: Product line PV 2 160 HP