How should heating zones be configured in a commercial shrink packaging machine?

Confirm the number of independently controlled heating zones for the intended film, product thickness, shrink temperature, and cooling process. The purchase decision should use the actual recipe, load, and duty cycle rather than a catalogue maximum. At acceptance, repeat the agreed test with production-equivalent material and compare the result with the contractual tolerance. These records make the technical promise measurable and reduce disagreement when the machine arrives at the buyer’s site. For repeat orders, preserve the approved configuration so a later machine is built to the same practical performance basis and documented settings.