Modular Nozzle for Coaxial Extrusion

A nozzle for coaxial extrusion, comprising at least two or more modules for coaxial extrusion, each of said modules comprising an inlet, an extrusion channel and an outlet, said inlet adapted for influx or application of material to be extruded via the extrusion channel, and said extrusion channel connecting said inlet and said outlet,

• wherein in a first module of said two or more modules, the extrusion channel is centrally arranged along a longitudinal axis (L) of the module,
• wherein in the following module(s) the extrusion channel is a tubular channel adapted to be arranged around the first module's extrusion channel along the longitudinal axis (L) of the first module,
• wherein said first and following module(s) are adapted to be mounted together such that the extrusion channels are essentially coaxially and concentrically aligned along the longitudinal axis (L) of the first module and the outlets of each module are arranged coaxially for coaxial printing of single, double or multi-layered tubular structures when the modules are connected,
• wherein the two or more modules are configured as separate parts adapted to be assembled together by a user to jointly form the nozzle,
• wherein the two or more modules are further adapted to be disassembled from each other by the user and optionally reassembled with the same or different number of said modules.