Valmet is set to supply a Valmet IQ Quality Control System for corrugator to Sheets Unlimited in Renton, WA. The system will address key quality challenges, most notably moisture imbalance which is the root cause of warp, to improve board quality, production efficiency, and overall converting performance.
For independent sheet feeders like Sheets Unlimited who source roll stock from multiple mills, it is critical to ensure consistent quality and efficient production. Variations in paper grades, moisture levels, and fiber characteristics create unpredictable warp behavior that standard corrugator controls cannot fully manage, affecting converting performance, customer satisfaction, and material waste.
“We had the opportunity to see Valmet’s warp control solution in operation at another manufacturer in Europe. What stands out is its ability to address the root cause of warp: moisture imbalance. Based on the strong feedback from users and our own evaluation, we are confident in the value it brings to our operations. With this solution, we are well positioned to reduce variability, improve converting performance, and deliver products of even higher quality to both our internal and external customers,” says Krist Leland, Director of Manufacturing, Sheets Unlimited.
“With Valmet IQ, the customer will benefit from improved process stability, more uniform product quality, and reduced operator workload. The system’s precise moisture and warp measurements, combined with advanced automation, help minimize material waste and improve resource efficiency, while supporting sustainability targets. This project demonstrates how intelligent automation can enable more streamlined operations and enhanced overall performance,” says David Maddux, Board Converting Automation Sales Manager, North America, Automation Solutions, Valmet.
The delivery includes combined paper temperature, moisture balance, total moisture and warp control, utilizing an interface to the existing state-of-the-art corrugator heating elements. It also incorporates Valmet’s proven moisture measurement technologies and automatic moisturizing solution.
