Drum & Roll Cooling

Drum & Roll Cooling

Rotating Surfaces and Uniform Temperature

Drum and roll duty applies heat transfer to a rotating cylindrical surface. Molten product is applied and solidified for flaking, viscous film is cooled, or wet material is dried against a heated drum.

Uniformity is product quality. A cold spot produces thicker flake, a warm spot produces product that will not release. On a chill roll the film thickness follows the surface temperature directly, so uniformity is not a refinement, it is the specification.

Why inflated construction. Internal coils cool the drum wall only where they touch it. Inflated wall construction puts the flow passage continuously behind the working surface, which produces a far more even face.

Sizing inputs. Drum diameter and width, rotational speed, film thickness, the medium and its temperature, and how product is applied and removed. Doctor blade and knife arrangements are part of the same conversation.