Method for manufacturing a plastic container equipped with a handle obtained using boxing technique

A method for manufacturing a container (1) by stretch blow-molding from a preform made of plastic material in a forming unit, the forming unit comprising:

• at least one mold (2) defining an impression of the container to be formed and comprising at least one boxing insert (200) for a handle, each insert being movable through a wall (20) of the mold;
• and
• an elongation rod (3) that is movable heightwise within the mold along an extension axis (Xe) and intended to stretch the preform,
• the method comprising, in succession, a pre-blow-molding step (S1) and a blow-molding step (S2),
• the method also comprising:
• a step of stretching of the preform comprising, in succession, a phase of lowering (E1), and a phase of rising (E2) of the elongation rod along the extension axis;
• and
• a step of boxing (B) of a handle using the insert or inserts, the handle being formed by deforming at least one portion, called “deformed portion” (100), of a wall (10) of the container, wherein:
• the phase of rising of the elongation rod is initiated before the blow-molding step;
• and
• the boxing step is initiated after the rising of the elongation rod beyond a predetermined height along the extension axis on which the handle is formed, the handle being formed on the extension axis of the elongation rod.