Abstract: A forming method, in a mold provided with a wall forming a cavity, of a container from a blank, which includes a boxing operation of pushing back the material of the blank by an insert movably mounted with respect to the wall of the mold between a retracted position in which the insert is retracted into the wall, and a deployed position in which the insert protrudes with respect to the wall, in order to form on the container, by pushing back, a hollow reserve projecting toward the interior of the container. Additionally, a local pressurization operation is performed, after formation of the hollow reserve, of injecting a pressurized fluid between the insert and the hollow reserve.

Abstract: A forming method, in a mold provided with a wall forming a cavity, of a container from a blank, which includes a boxing operation of pushing back the material of the blank by an insert movably mounted with respect to the wall of the mold between a retracted position in which the insert is retracted into the wall, and a deployed position in which the insert protrudes with respect to the wall, in order to form on the container, by pushing back, a hollow reserve projecting toward the interior of the container. Additionally, a local pressurization operation is performed, after formation of the hollow reserve, of injecting a pressurized fluid between the insert and the hollow reserve.