Patent ID: 7654726

Claim:
An extruder having a plurality of axially parallel, codirectionally rotating shafts disposed in a process chamber between a housing and a core along a circle at equal central-angle distance and equipped with processing elements with which adjacent shafts mesh with each other, whereby axially parallel, circular segment shaped longitudinal depressions are provided for receiving the shafts on the inner side of the housing and the outer side of the core, the housing is composed of housing segments, at least one of which is provided with a heating means, the housing segment at the upstream conveying end has a material feed opening and the discharge is provided at the downstream conveying end, characterized in that the core has outwardly leading cooling channels for a cooling liquid to flow through, said at least one housing segment provided with the heating means has a cooling circuit with axially parallel, circumferentially distributed, interconnected cooling bores for a cooling liquid to flow through on the portion of the housing segment facing the process chamber, and the at least one housing segment has associated therewith a temperature control device for controlling the heating means and the flow of cooling liquid through the cooling bores.