An extruder for hybrid microcatheters comprises an extrusion die, a commuter element and several resin sources, the commuter clement allowing for resin selection.

A device for centering an extrusion die for extruding an extrusion material wherein the device includes a housing means on or in which one or more centering elements are arranged or formed, wherein the one or more centering elements are configured to exert a centering force on an extrusion die to be centered, wherein the housing means comprises one or more fastening interfaces, by means of which the housing means can be fastened to an extrusion die to be centered or to an extrusion means comprising an extrusion die to be centered.

A die group with a forming head for forming a tubular parison made of plastic material with a female die, which defines an internal through-cavity with a vertical die axis, a female die holder element, rigidly connected to the female die, and a housing body which defines a vertical reference axis for coupling with a distribution duct of the forming head and supports the female die holder element allowing relative movement thereof in a longitudinal/transverse plane. A first electric driving actuator is supported on the housing body and rotationally drives a first output element coupled with the female die holder element by means of a first transmission mechanism so as to move the female die holder element in the longitudinal/transverse plane with respect to the housing body, in accordance with a first isometric transformation.

Methods, apparatuses, systems, and techniques relate to a tube-forming device for an extruder unit or an extrusion device and a tube-forming process. The tube-forming device comprises at least one shaping sleeve, which is designed to shape a supplied stream of polymer melt from a substantially strand-like cross section into a tubular cross section. The shaping sleeve has a guiding passage embedded in the sleeve wall, such that the guiding passage is a cavity which lies within the sleeve wall and, in the radial direction of the shaping sleeve, is enclosed in a sealed manner with respect to the outer surfaces.