Abstract: An extrusion machine is disclosed wherein wax or other suitable lubricant is applied to the side of the feedstock contacting the shoe of the extruder. A stick of wax may be supported in a cylinder having an open end facing the feedstock; the stick is a loose sliding fit in the cylinder and compressed gas introduced into the cylinder applies a substantially constant biassing force urging the stick into engagement with the feedstock and at the same time, by leaking between the stick of lubricant and the cylinder, cools the stick of lubricant to inhibit melting.

Abstract: A method and apparatus are provided for continuously extruding rod feedstock through a die orifice while gripping two opposed sides of the feedstock to a pressure greater than the yield strength of the material with means for applying lubricant to the ungripped surfaces, constraining walls between which the feedstock is fed in the gripped condition, a stop at one end of the constraining walls, and a die orifice near the stop through which the feedstock is extruded, said lubricant applying means including at least two cylinders each having an open end facing a respective one of the ungripped surface when the apparatus is in use and means for introducing compressed gas into each of the cylinders.