| 摘要 |
<p>The invention concerns a heating module (22) for a preform (10) of a plastic container, comprising a longitudinal heating tunnel (24) transversally delimited by the vertical and longitudinal inner faces (36, 38) of two walls (40, 42), the first heating wall (40) being equipped with a heating system (46) and the other wall (42) having ventilating openings (50) enabling air blown by a blower (52) to transversally pass from upstream to downstream, and in which a first part (12, 14) of the preform (10) is heated inside the heating tunnel (24), whereas the second part (16) of the preform (10) is held on the outside of the heating tunnel (24) while passing through a longitudinal opening (41) in which the blower (52) comprises a baffle (62) that diverts a portion of the blown air toward the second part (16) of the preform (10) in order to prevent it from being heated to its softening temperature. The invention is characterized in that the upstream end (64) of the baffle (62) is aerodynamically profiled. The invention also concerns an oven for heating a preform (10) that comprises a number of heating modules (22).</p> |
