Drum & Roll Cooling

Uniform enough that flake thickness or film release does not change across the face, and the product sets that tolerance. Waxes and resins with a sharp solidification point are very sensitive, while broad-melting products tolerate more variation. Tell us how the product behaves near its set point and where quality complaints show up today, such as one edge producing thicker flake.

A rotary joint at one or both journals passes the medium in and out while the drum turns. Its size and rating limit the flow and pressure available, so on a retrofit the existing joint is part of the check. Send the joint details along with the drum drawing, including the journal bore.

Medium warms as it travels, so the face runs coolest where the medium enters and warmest where it leaves. A higher flow rate keeps that rise small, at the cost of a larger pump and rotary joint. Tell us the medium temperature rise you can accept across the drum, and we check it against the uniformity the product needs.

Faster rotation shortens contact time, so each part of the film spends less time on the cold face and leaves warmer. Throughput rises, but only if the surface can still remove heat fast enough to solidify the film before the knife. Give us the speed range you run so the medium temperature and flow can be checked at the top end.

The finish affects how cleanly product releases at the knife or doctor blade, and it wears over time. Tell us whether the product sticks and what the blade is made of, since that steers the face material and finish. Corrosive or abrasive products may change the surface material entirely.

With no flow, the face drifts toward ambient quickly and product on it softens, sticks or fails to solidify, so production has to stop. A flow switch on the medium return, interlocked to the product feed, stops the line before the face loses temperature. Tell us how the line is controlled today so the interlock fits it.