Abstract: A method of and apparatus for removing plastic residues from objects of plastics processing machines includes a container with a treatment chamber filled with a heat transfer fluid and receiving an object such as extrusion heads or blow heads. A considerable reduction of the cleaning period is attained when withdrawing from the treatment chamber a portion of the heat transfer fluid and after being pressurized by a pump returning pressurized heat transfer fluid back into the chamber in form of a focused stream which is pointed in direction of the object being cleaned.

Abstract: A cleaning apparatus for removing synthetic residues from rotating parts of plastics processing machines includes a heatable tubular container which contains a dry powder or granular filling and is provided with an upper axial opening through which the part to be cleaned is introduced into the container. The part is clamped at its one end by a chuck which cooperates with a double-acting piston/cylinder unit so as to be movable upwardly and downwardly for introducing the part to be cleaned in the container and removing it therefrom after the cleaning cycle.