Extrusion Equipment for Multilayer Extrusions and Process for Production of Multilayer Extrusions With the Same

摘要

Extrusion equipment provided with a die assembly for extruding a multilayer extrusion having a core-sheath structure composed of a core material and a sheath material covering the core material, which assembly has the first die assembly body provided with a core material feeding port on the sidewall and the second die assembly body provided with a sheath material feeding port on the sidewall, the bodies being vertically connected in a detachable way. The first and second die assembly bodies are constituted in such a way as to be connected even when one of the bodies is horizontally turned by an angle of twice the angle α to the other. To absorb the vertical shift after the rotation, the first extruder and the second extruder are equipped with elevator devices. Thus, an extruder for a core material can be exchanged for an extruder for a sheath material without changing the directions of the extruders connected to a die assembly.