Patent ID: 7101167

Claim:
An apparatus adapted to be mounted to an extrusion machine and including an extrusion passage for shaping a mixture received from the extrusion machine into a rotary tool for chip forming machining, the extrusion passage defining a center axis, the apparatus comprising: a housing adapted to be mounted to an extrusion machine; a nozzle disposed in the housing and forming a restriction in the extrusion passage; a die disposed in the housing downstream of the nozzle and forming a portion of the extrusion passage; and a jaw structure situated adjacent a downstream of the die in an inner position defining a portion of the extrusion passage and including an open inlet and an open outlet through which the mixture axially passes upon exiting the die, the jaw structure having at least one jaw including a shaping element arranged to form a shape in an outer periphery of the mixture as the mixture travels axially therepast, the at least one jaw being movable in a direction away from the center axis to an outer position out of engagement with the mixture to avoid applying the shape thereto, wherein the open inlet and the open outlet defined by the jaws disposed in their inner position are of substantially the same size, wherein the die includes a through-hole of circular cross-section, and further including a core disposed in the passage upstream of the circular cross-section through-hole, and wherein the core is rectangular and a pair of pins project from the core in the feed direction for forming flush channels in the tool.