Method for producing a foam body

A method for producing a foam body in a pressure accumulator, the method comprising the steps of:

• providing a pressure accumulator with an elastically flexible separating layer separating a gas working chamber from a fluid chamber inside an accumulator housing of the pressure accumulator, the pressure accumulator comprising a valve in the fluid chamber movable between an open position and a closed position;
• introducing a flowable foam material in the gas working chamber of the pressure accumulator so as to be at least partially surrounded by the separating layer;
• hardening the flowable foam material in the gas working chamber of the pressure accumulator;
• and
• building up a pressure gradient as the flowable foam material increasingly hardens and expands the separating layer from an original, partially-filled starting state to a final state in which the pressure accumulator is finally and fully filled with the hardened foam and the separating layer,
• wherein the hardening of the flowable foam material in the gas working chamber of the pressure accumulator and the building-up of the pressure gradient occur while the gas working chamber is closed to an environment surrounding the pressure accumulator, and
• wherein the pressure gradient expands the separating layer until the separating layer moves the valve from the open position to the closed position.