Internally heatable nozzle having a divisible housing and a divisible core

An internally heatable nozzle comprising a divisible housing having a cylindrical bore narrowed at one end towards a mouth opening of the nozzle, in which bore a cylindrical, divisible core of thermally conductive material is connected at one end in said housing, said core having a conical end proximate to and tapering toward said mouth opening and being provided with an internal heating element with connecting leads passed laterally through said housing, an annular channel being arranged between said core and said housing and connected with at least one feeding channel passing through the housing on the side remote from the mouth opening, said core being divisible in a transverse direction to present two parts provided with directly adjacent flanges, said flanges having axially extending channels communicating said feeding channel with the channel between the housing and the core and said flanges fitting between inner shoulders on the two parts of the housing, between which parts tensile elements are operative to tighten the core parts together.