Method and device for moulding containers, particularly bottles, by drawing-blowing thermoplastic material with a petaloid bottom

摘要

During the drawing phase, heat losses are reduced in longitudinal zones (19) of end part (20) of a preform (16), extending over the preform bottom (18) and over an axial portion of the perform body (21) adjacent to the perform bottom, distributed over the periphery of the ends of the preforms sensibly facing respective cavity (11) of the mold bottom (1). The thermoplastic material of the longitudinal zones, which remains at a higher temperature, is drawn in a homogeneous fashion. The feet of the bottom of the containers feature an increased thickness of material and are mechanically stronger. An independent claim is also included for a thermoplastics material molding device.