Abstract: An apparatus for producing a piston may include a casting mold having an axially open cavity defining a surrounding cavity wall, the cavity wall being profiled to receive an annular core to define a cooling duct geometry. A core holding device may be adjustable in an axial direction for introducing the core into the casting mold. The core holding device may include a gripping device for gripping the core. The gripping device may include a plurality of spreadable first grippers. The plurality of first grippers may be adjustable at least between a first position, in which the plurality of first grippers are arranged in a radially inner position, and a second position, in which the plurality of first grippers transition radially outwards in relation to the first position and support the core.

Abstract: An apparatus for producing a piston may include a casting mould having an axially open cavity defining a surrounding cavity wall, the cavity wall being profiled to receive an annular core to define a cooling duct geometry. A core holding device may be adjustable in an axial direction for introducing the core into the casting mould. The core holding device may include a gripping device for gripping the core. The gripping device may include a plurality of spreadable first grippers. The plurality of first grippers may be adjustable at least between a first position, in which the plurality of first grippers are arranged in a radially inner position, and a second position, in which the plurality of first grippers transition radially outwards in relation to the first position and support the core.

Abstract: The invention concerns an assembly comprising a tube in composite material including carbon fibers embedded in a resin, an extremity of which is equipped with a sleeve in plastic material such as polyamide, optionally equipped with a jointing thread. According to the invention, the tube comprises at least one layer of composite material, and the sleeve is obtained by overmolding injection of material on the tube. Preferably, the composite material constituting the tube comprises two adjacent layers of carbon fibers embedded in carbon, the inner layer being a layer whose fibers are substantially longitudinal, whereas the outer layer comprises helically arranged fibers.