K Design: First two-sided air ring for auto gauge control

A new air-ring system for automatic blown-film gauge control is the first to profile air flow around both the inside and outside of the bubble. Called Vario Cool Duo, it was developed by K Design GmbH in Germany. VarioCool Duo It is aimed at high-end films for lamination that require tight tolerances similar to cast film.
The air ring is unusual in blowing air just above the die-beneath the standard air ring and IBC tower, where the melt is hottest. The result is said to be more effective gauge control. VarioCool Duo was introduced at K 2001 in Germany and is already installed at several European processors. It fits in Future Design’s standard Saturn air ring and can be retrofitted, but some die modification is required.

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