Apparatus for continuous extrusion

Continuous extrusion apparatus comprising a rotatable wheel with an endless groove therein, a relatively stationary shoe member overlying part of said groove lengthwise and having a portion projecting part way into said groove, a die assembly removably and replaceably incorporated as an assembly in said shoe member so as to provide at least a part of the projecting portion thereof, a removable and replaceable abutment member formed by a removable and replaceable part of said die assembly, said abutment member projecting into and blocking said groove, removable and replaceable die means forming part of said die assembly, and fluid coolant passage means for effecting cooling of said die assembly and its parts, whereby feedstock material fed to the passageway formed by said shoe member projecting portion and that part of said groove into which it projects and with which it cooperates is caused by the force generated by friction between the groove floor and sides of the feedstock material on rotation of said wheel and by the presence of said abutment which blocks one end of said passageway, to become upset and to be extruded through said die means of said die assembly.