Process for the production of a cable and device for performing this process

Extruder for the production of a cable having at least one covering layer consisting of a composition based on at least one polymeric material, said extruder comprising:

• a cylindrical casing;
• at least one extrusion screw of preset pitch positioned within said casing and having an axis of rotation parallel to the axis of said cylinder;
• at least one charging hopper located at a first end of said casing;
• a filtration section located close to the head of said screw, and positioned perpendicular to the axis of said screw, said filtration section comprising at least one filtration element held by a support element;
• a connecting flange positioned dowmstream from said filtration section, and an extrusion head comprising a conveyor element and a die communicating with the exterior, so as to define a second end of said casing, characterized in that said support element is a plate of the sectored type.

Apparatus for the production of a cable having at least one covering layer consisting of a composition based on at least one polymeric material, said apparatus comprising:

• at least one charging hopper for feeding the polymeric material, optionally premixed with other components of said composition;
• at least one extruder comprising an extrusion screw and an extrusion head inside of which is contained a die for the purpose of fitting said covering layer around at least one conducting element of said cable;
• at least one device for unwinding said conducting element, and
• at least one device for winding said cable, characterized in that the filtration section of said extruder has a filter support plate of the sectored type.