Patent ID: 8549890

Claim:
A method for manufacturing a separating disk adapted to be included in a disk package of a centrifuge rotor of a centrifugal separator, wherein the separating disk extends around an axis (x) of rotation and has a tapering shape with an inner surface and an outer surface along the axis (x) of rotation, the method including: providing a blank of a material, making an central opening in the blank, positioning the blank in a charging position between a first tool part and a second tool part of a press tool, the first tool part and the second tool part being separated from one another by means of a projecting central portion provided on the second tool part, and pressing of the blank against the first tool part which has a shape corresponding to the tapering shape of the separating disk; the pressing step comprises forming of an area around the central opening in such a way that the material in the area around the central opening forms a centering member, which at least partly extends cylindrically and concentrically with the axis (x) of rotation; and the pressing step comprises a first part step where the blank by means of the second tool part is pressed in a direction towards the first tool part in such a way that said centering member is formed and that a sealing element of the second tool part abuts the blank around the central opening.