Bonnell springs remain the most widely used spring system in the global mattress industry, accounting for over 60% of spring mattress production worldwide. Their hourglass shape and knotted-end design provide exceptional durability at a cost-effective price point, making them the preferred choice for mid-range and high-volume mattress manufacturing.
Infinity Mattress Machinery's IF-BPL90 Bonnell Spring Production Line and IF-B100 High-Speed Bonnell Spring Coiling Machine form a complete, integrated solution for manufacturers who need to produce Bonnell springs at scale �?from wire coiling through automatic assembly to a finished spring matrix ready for mattress assembly.
In this guide, we break down the capabilities of each machine, compare their roles in the production workflow, and demonstrate how integrating them can transform your spring production efficiency.
Spring Coiling Speed
Operators per Line
Mattress Output Capacity
Bonnell springs �?also known as hourglass or open-coil springs �?have been the backbone of mattress support systems for over a century. Their knotted-end construction prevents fabric punctures, while the hourglass shape provides progressive resistance that adapts to body weight distribution.
For manufacturers targeting mid-range and economy mattress segments, Bonnell springs offer the best cost-per-spring ratio. A typical queen-size mattress requires 300-500 Bonnell springs, making production speed and consistency critical factors in overall manufacturing cost.
The IF-B100 coiling machine and IF-BPL90 assembly line work together to eliminate the traditional bottlenecks in Bonnell spring production �?slow coiling speeds, manual spring handling, and inconsistent assembly quality.
The IF-B100 is a high-speed automatic spring coiling machine designed specifically for Bonnell (hourglass) spring production. It forms, knots, and cuts spring wire in a single continuous operation.
The IF-B100 feeds directly into the assembly line, eliminating the need for intermediate spring storage and manual transfer �?a key advantage for factories operating at high volume.
The IF-BPL90 is a fully automated Bonnell spring assembly line that takes coiled springs through the complete assembly process �?from feeding and positioning to helical wire lacing and finished spring matrix output.
When paired with the IF-B100 coiling machine, the IF-BPL90 creates a seamless production pipeline: wire enters the coiler, springs are immediately transferred to the assembly line, and finished spring matrices exit ready for mattress assembly.
These two machines serve distinct but complementary roles:
Reduce spring production labor by up to 65%. One IF-B100 + IF-BPL90 line requires only 3-4 operators versus 10-12 for manual assembly.
Digital control ensures every spring has identical wire tension, knot position, and height. Rework rates drop below 1%.
The inline coiling-to-assembly layout reduces floor space by approximately 40% compared to separate stations with intermediate storage.
Add additional IF-B100 machines to feed a single IF-BPL90 line for higher throughput without duplicating the assembly line.
A mattress manufacturer in Indonesia was producing Bonnell spring mattresses using a combination of semi-automatic coilers and manual assembly stations. With 12 workers dedicated to spring production, they could produce approximately 500 mattress units per day, but quality inconsistency across shifts was causing a 6% rework rate.
The factory installed one IF-B100 coiling machine and one IF-BPL90 assembly line. The results over the first 3 months:
The IF-BPL90 and IF-B100 integrate seamlessly into a complete mattress production workflow. The spring matrices feed directly into tape edge machines and quilting stations, with finished mattresses moving to packing machines.
Infinity Mattress Machinery offers complete turnkey production line design services. Our engineers will map your current floor plan, calculate throughput requirements, and recommend the optimal configuration of coiling, assembly, quilting, tape edge, and packing equipment.
Both machines are compatible with Industry 4.0 monitoring for real-time production tracking.
For manufacturers producing Bonnell spring mattresses at scale, the combination of the IF-B100 coiling machine and the IF-BPL90 production line offers a clear path to reducing labor costs, improving quality consistency, and increasing output.
Whether you are upgrading an existing spring production line or building a new factory from the ground up, integrating these two machines is one of the fastest ways to achieve a competitive advantage in the mid-range mattress market.
Get a free consultation and customized ROI analysis. Our engineers will recommend the optimal IF-B100 and IF-BPL90 configuration for your factory based on your target volume and mattress specifications.
