Abstract: The invention relates to a head attachment for a hydraulic synthetic-resin processing machine for colored synthetic resin, the attachment comprising a mixer, a synthetic resin supply vessel directly connected with the former and a coloring mass supply vessel connected herewith through a dosing device, which device is provided with a hydraulic motor for driving the dosing device.

Abstract: An internally heatable nozzle provided with a divisible housing having a cylindrical bore narrowed at one end towards the mouth opening of the nozzle in which bore a cylindrical core is connected at one end in said housing, said core being divisible in transverse direction, its two parts being provided with directly adjacent flanges, which flanges have throughgoing axially channels lying in the extension of the annular channel of the housing and which flanges fit in between inner shoulders on the two parts of the housing, between which parts tensile elements are operative tightening the core parts together, the core being conical at one end 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 on the side remote from the mouth opening.