Bonnell springs (also known as open coil springs) are one of the most widely used spring types in the global mattress industry. The IF-B90 High Speed Computerized Bonnell Spring Coiling Machine from Infinity Mattress Machinery produces Bonnell springs at speeds of 80 springs per minute — with coiling, knotting, heat treatment, and collection happening in one continuous automated cycle. This article explores the technology behind the IF-B90 and why it is the ideal choice for Bonnell spring production.
Bonnell springs are hourglass-shaped coils connected by helical wires to form a unified spring unit. Unlike pocket springs, each Bonnell spring is open — not individually encased — which gives them a distinct feel and makes them more cost-effective for many mattress types. They are widely used in hospitality mattresses, budget to mid-range consumer mattresses, and institutional bedding. The IF-B90 specializes in producing these springs with computerized precision at industrial speed.
The IF-B90 performs four critical operations in a single automated cycle: wire coiling to form the spring shape, knotting at both ends to secure the coil, heat treatment to set the spring's shape and resilience, and collection to an outlet channel for the next production stage. This integration eliminates the need for separate machines or manual handling between steps, reducing labor costs and ensuring consistent quality.
80 springs per minute. A single IF-B90 can produce up to 38,000 springs per 8-hour shift.
Coiling, knotting, heat treatment, and collection — all in one machine. No manual transfers between steps.
Digital control ensures consistent spring dimensions, tension, and heat treatment. Reduced defect rate.
Bonnell springs have been used in mattresses for over a century. The IF-B90 brings this proven technology into the digital age.
The IF-B90 is the ideal solution for mattress manufacturers looking to produce high-quality Bonnell springs efficiently. Its 80 springs/min output, 4-in-1 integrated cycle, and computerized precision make it a reliable and cost-effective choice for any factory producing Bonnell spring mattresses.
Explore our complete spring machine collection or learn about our integrated production solutions.
Contact us for a quote on the IF-B90 Bonnell spring coiling machine. We will help you configure the ideal setup for your production needs.
