You are still buying innerspring units from a supplier. You pay $12-$18 per unit, wait 7-10 days for delivery, and have no control over quality. Every time a shipment is late, your entire mattress production line stops. Every time a unit has broken springs, you either use it and risk returns or scrap it and eat the cost.
A mattress factory in Mexico was buying 2,000 innerspring units per month at $14 each. Their annual spend was $336,000. They installed an IF-B90 coiling machine and IF-BA assembling machine. Their cost dropped to $8.40 per unit — a 40% reduction. The equipment paid for itself in 7 months. This guide shows you exactly how to do the same.
If you manufacture Bonnell spring mattresses, you face a choice: buy pre-assembled innerspring units from a supplier, or produce them in-house. Most manufacturers start with the supplier route because it seems easier. No equipment investment, no training, no maintenance. Just order and receive.
But the hidden costs add up fast. A supplier mark-up of 40-60% over raw material cost is standard. Delivery lead times of 5-10 days mean you must carry inventory. Quality issues — inconsistent spring height, loose knots, misaligned rows — cause rework on your assembly line. And every supplier delay directly stops your production.
For a factory producing 2,000 mattresses per month, buying units at $14 each costs $336,000 annually. Producing them in-house with automated equipment cuts the cost to $8-$9 per unit — saving $120,000-$144,000 per year. The equipment pays for itself in under a year, and after that, the savings go straight to your bottom line.
The IF-B90 is the starting point of your in-house Bonnell spring production. This machine takes steel wire and produces finished Bonnell springs at 90 pieces per minute. In one cycle, the wire is coiled into a spring, knotted at both ends, heat-treated for durability, and collected at the outlet.
The machine is controlled by a fully integrated PLC system with a high-sensitivity touch screen. All functions — wire feeding length, heat treatment temperature, lubrication intervals, and self-protection — are automatically controlled. The system supports remote control and stores production parameters for different spring specifications. Changeover between spring sizes takes under 15 minutes.
Produces finished Bonnell springs at 90 pcs/min. PLC controlled. Coiling, knotting, heat treatment in one pass. 1.8-2.4mm wire, 80-190mm spring height.
View Product →| Specification | IF-B90 |
|---|---|
| Spring Type | Bonnell |
| Capacity | 90 springs/minute |
| Spring End Ring | 62-75mm / 75-95mm |
| Steel Wire Gauge | 1.8-2.4mm |
| Spring Height | 80-190mm (optional 210mm) |
| Convolutions | 4-7 turns |
| Main Drive Power | 4 KVA |
| Heat Treatment | 15 KVA |
| Weight | Approx. 2,730 kg |
| Power Supply | 380V, 3-phase, 50-60Hz |
Once the IF-B90 produces the individual Bonnell springs, the IF-BA takes over to assemble them into finished innerspring units. This machine connects the springs into rows using helical wire, producing complete mattress spring units ready for upholstery.
The IF-BA operates without compressed air, using mechanical transmission for reliable performance. It automatically coils the upper and lower helical wires together, cuts and clamps the wire at both ends, counts spring rows, and ejects the finished unit. One operator can run both the IF-B90 and IF-BA simultaneously, keeping labor costs minimal.
Assembles Bonnell springs into complete innerspring units. 300-500 peaks/min. No compressed air needed. Automatic row counting and ejection.
View Product →| Specification | IF-BA |
|---|---|
| Capacity | 300-500 peaks/min |
| Spring Wire Gauge | Φ1.8-Φ2.4 mm |
| Height Wire Gauge | Φ1.3-Φ1.6 mm |
| Spring Height | 70-190 mm |
| Max Unit Width | 2 m |
| Jaw Specs | 68mm / 78mm / 88mm / 92mm / 98mm |
| Total Power | 3 KVA |
| Weight | Approx. 990 kg |
A mattress manufacturer in Guadalajara, Mexico was buying 2,000 innerspring units per month from a local supplier at $14 each. Their annual spring cost was $336,000. Delivery was unreliable — the supplier was late on 3-4 orders per month, causing production downtime that cost an estimated $4,000 per incident.
The factory owner decided to invest in in-house production. He purchased an IF-B90 coiling machine and an IF-BA assembling machine for a combined $48,000. Installation took 3 days, and his existing maintenance technician was trained to operate both machines in one week.
The result: production cost dropped to $8.40 per unit, saving $5.60 per unit. On 2,000 units per month, that is $11,200 monthly savings or $134,400 per year. The equipment paid for itself in 7 months. The factory now produces 2,500 units per month with the same machines and has eliminated supplier-related downtime entirely.
| Cost Factor | Supplier | In-House (IF-B90+BA) | Annual Savings |
|---|---|---|---|
| Cost per unit (2K/month) | $14.00 | $8.40 | $134,400 |
| Downtime from late delivery | $16,000 | $0 | $16,000 |
| Quality rejects (3-5%) | $10,080 | $500 | $9,580 |
| Transport & handling | $5,400 | $200 | $5,200 |
| Total Annual Impact | $367,480 | $202,420 | $165,180 |
With a combined equipment investment of $48,000 for the IF-B90 and IF-BA, the payback period is under 4 months for a factory producing 2,000 units per month. After payback, the in-house production line generates over $165,000 in annual savings while giving you full control over quality and delivery.
For manufacturers producing over 3,000 units per month, the IF-BPL100 integrates coiling and assembly into a single automated production line. This machine produces finished innerspring units directly from steel wire, with automatic transfer between the coiling and assembly stages.
The IF-BPL100 handles the entire process: wire is coiled into springs, springs are transferred to the assembler, upper and lower helical wires are coiled together, the unit is cut and clamped at both ends, and the finished innerspring unit is ejected automatically. Capacity is 80-100 units per 8-hour shift depending on mattress size, with a maximum width of 2 meters. One operator manages the entire line.
Complete automated Bonnell spring production line. From wire to finished units. 80-100 units/8hr shift. Max width 2m. Single operator.
View Product →Both the IF-B90 and IF-BA are designed for straightforward maintenance. The automatic lubrication systems on both machines reduce daily maintenance to visual inspections and basic cleaning.
Daily (10 minutes per machine): Check wire tension and alignment. Verify the lubrication system is functioning. Remove metal dust and debris from the work area. Inspect the output for spring defects.
Weekly (15 minutes per machine): Inspect coiling and knotting tools for wear. Check electrical connections. Verify sensor alignment. Clean the touch screen and control panel.
Monthly (30 minutes per machine): Replace worn coiling tools if needed. Lubricate mechanical drive components. Check belt tension. Verify heat treatment temperature accuracy on the IF-B90. Run a full diagnostic cycle.
Q: How many operators are needed for the IF-B90 and IF-BA?
A: One operator can run both machines. Springs produced by the IF-B90 feed directly into the IF-BA. One person monitors both machines, checks spring quality, and manages the output. Total labor cost: one operator per shift.
Q: How long does it take to change between spring sizes?
A: On the IF-B90, changeover between spring heights and end ring diameters takes 10-15 minutes. On the IF-BA, changing jaw sets takes 15-20 minutes. The PLC stores up to 10 spring specifications, so recalling a previous setup is instant.
Q: What training is required for operators?
A: Basic mechanical aptitude is sufficient. Most operators are fully productive after 3-5 days of training. The touch screen interface guides operators through setup and operation. Our technical team provides remote training during installation.
Q: How much floor space do the two machines need?
A: The IF-B90 measures approximately 3m x 2m, and the IF-BA measures approximately 4m x 2m. Allow 5m x 8m total for both machines with operator access and material staging. The IF-BPL100 integrated line requires approximately 8m x 6m.
Q: Can the machines handle different mattress sizes?
A: Yes. The IF-BA accepts spring rows up to 2 meters wide, covering twin, full, queen, king, and California king sizes. The IF-BPL100 also supports up to 2 meters width. Changeover between mattress sizes takes under 20 minutes.
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