| 摘要 |
<p>The heating module (22), especially for a plastic container preform, consists of a tunnel (24) with a heating wall (40) and a perforated wall (42) linked to a cooling air blower (52) with a fan (56) and a deflector (62). The leading edge (64) of the deflector is aerodynamically-shaped to that it directs a proportion of the cooling air flor towards the neck (16) of the container preform that is situated outside the tunnel to prevent it from reaching its melting point. The deflector can be pivoted about its lengthwise axis to regulate the air flow through the perforated wall, and it also acts as a heat screen that prevents heat produced by the tunnel's heating system from reaching the projecting part of the preform through the tunnel aperture (41).</p> |
