Nozzle terminal for injectors of plastic material injection moulding apparatus

A nozzle terminal for injectors of plastic material injection moulding apparatus, comprising a tubular tip defining a flow passage for injected plastic material and a ring nut coaxial to the tip, said tip including a radially inner element made of an abrasion resistant first material, an intermediate element made of a high thermal conductivity second material, and a radially outer element made of a corrosion resistant third material, wherein said radially inner, intermediate and radially outer elements are joined to each other in intimate mutual contact, wherein the radially inner element comprises a distal portion having a substantially constant thickness and extending up to the free end of the tip and the intermediate element is applied to such distal portion and has a constant thickness, which is substantially equal to the thickness of said distal portion of the radially inner element along an entire length of the mutual contact of the radially inner element and the intermediate element, wherein the radially outer element has a thickness less than the thickness of said distal portion of the radially inner element and the intermediate element and has a length extending beyond proximal and distal ends of the intermediate element so as to fully cover the intermediate element and hermetically insulate the intermediate element from the environment, and wherein the radially outer element distal end terminates in a thickened end portion enclosing the free end of the tip.