Abstract: A piston for a fluid-actuated working cylinder, with a piston base unit which is coaxial to a piston longitudinal axis, consisting of a rigid core body which has radial outer peripheral surface and of an annular filling body which is seated in an annular receiving groove. The receiving groove is coaxial to the piston longitudinal axis and in the region of the radial outer peripheral surface is designed with a radially outwardly facing groove opening in the core body. The piston further includes a ring element which consists of plastic. The ring element radially outwardly coaxially encompasses the piston base unit at least in the region of the filling body, being radially supported with a radial inner peripheral surface on the piston base unit, projecting radially beyond the radial outer peripheral surface of the core body and comprising an axially orientated axial support surface radially outside the piston base unit on its two axial face sides.

Abstract: A piston for a fluid-actuated working cylinder, with a piston base unit which is coaxial to a piston longitudinal axis, consisting of a rigid core body which has radial outer peripheral surface and of an annular filling body which is seated in an annular receiving groove. The receiving groove is coaxial to the piston longitudinal axis and in the region of the radial outer peripheral surface is designed with a radially outwardly facing groove opening in the core body. The piston further includes a ring element which consists of plastic. The ring element radially outwardly coaxially encompasses the piston base unit at least in the region of the filling body, being radially supported with a radial inner peripheral surface on the piston base unit, projecting radially beyond the radial outer peripheral surface of the core body and comprising an axially orientated axial support surface radially outside the piston base unit on its two axial face sides.

Abstract: A process for producing plastic moulded pieces which include, in particular, at least one formed continuous fibre-reinforced thermoplastic sheet (9) overmoulded with a thermoplastic material, includes the steps of: —providing a continuous fibre-reinforced thermoplastic sheet (9); —providing an oven (10) for heating a continuous fibre-reinforced thermoplastic sheet (9) placed in the oven (10); introducing an anti-adhesive layer (12) in the oven (10); introducing the continuous fibre-reinforced thermoplastic sheet (9) into the oven (10); heating the continuous fibre-reinforced thermoplastic sheet (9) in contact with the anti-adhesive layer (12) to a forming temperature; —removing the heated continuous fibre-reinforced thermoplastic sheet (9) from the oven (10) and transferring same to a mould (15, 7, 8) for forming and/or overmoulding the continuous fibre-reinforced thermoplastic sheet (9).