Q1. What is a pocket spring machine?

A pocket spring machine is an automated mattress manufacturing machine that produces individually pocketed steel springs for mattresses, sofas, cushions, pillows, and other upholstered furniture products. The machine typically forms high-carbon steel wire into coils, controls the spring dimensions and tension, wraps each spring in non-woven fabric, seals the fabric pocket, and cuts or connects the pocket springs into continuous strings. Depending on the machine configuration, it can also support different spring diameters, heights, wire gauges, firmness levels, and zoning designs.

Q2. How does a pocket spring machine work?

The working principle of a pocket spring machine is to process steel wire into individual pocket springs wrapped in fabric through a continuous automated process. First, the steel wire is fed into a precision winding system and wound into springs according to preset parameters. Then, after cooling, the springs are sealed into non-woven pockets using ultrasonic welding, thermal welding, sewing, or other adhesive techniques. Finally, the finished pocket springs are counted, cut, and connected into pocket spring strings. These strings are then fed into a pocket spring assembly machine to be bonded together to form a bed core.

Q3. How many pocket springs can a pocket spring machine produce per minute?

The production speed of an individual pocket spring machine depends on its model, wire specifications, machine design, and level of automation. For producing standard pocket springs, modern high-speed machines can produce approximately 160 to 280 pocket springs per minute. For producing irregularly shaped springs, the production speed of Lianrou micro springs can reach 230 springs/minute, high-compression pocket springs 140-160 springs/minute, high-density pocket springs 100 springs/minute, and double-layer springs 110 pairs/minute. When comparing machines, mattress manufacturers should evaluate not only speed but also actual stable production speed, spring quality, changeover time, machine uptime, and machine lifespan.

Q4. What types of pocket springs can a pocket spring machine produce?

Depending on the machine configuration, Lianrou developed different models to produce special-shaped springs, such as the micro spring production line, pillow spring machine, double-layer pocket spring machine. Advanced production systems can also be designed for irregular or special-shaped springs. For example, Lianrou‘s high compression pocket spring machines can produce various types of pocket springs, including conventional pocket coils, high-compression pocket springs, four-loop springs, sofa springs, and other customized spring structures. Therefore, manufacturers should define their target spring products before purchasing equipment rather than choosing a machine based only on production speed.

Q5. Can a pocket spring machine produce zoning pocket spring mattresses?

Yes. Sectional pocket spring mattresses can be produced using a dual-line controlled pocket spring machine. Dual-line means it has two wire winding frames, allowing the production of springs with two different wire specifications. By changing the wire diameter, spring diameter, spring height, or stiffness parameters, manufacturers can produce softer springs for the shoulder and leg areas, and stiffer springs for areas requiring stronger support, such as the waist and hips.

Q6. What is the difference between a pocket spring machine and a pocket spring assembly machine?

A pocket spring machine and a pocket spring assembly machine together form a production line for producing pocket spring bed cores. They handle different stages of production. The independent pocket spring machine completes the process from winding raw steel wire into springs, packaging them into cloth bags, and splicing them into continuous pocket spring strips, producing individual pocket springs and continuous strings of individual pocket springs. The independent pocket spring assembly machine, on the other hand, arranges and assembles these spring strings into complete pocket spring bed cores, sofa spring cores, etc., according to the required bed core size and structure.

Q7. What steel wire and fabric can be used in a pocket spring machine?

Independent pocket spring machines typically use high-carbon spring steel wire, galvanized steel wire, and other metal materials to wind springs. The diameter of the selected steel wire is determined by the required spring hardness, height, diameter, compression ratio, and mattress design. Depending on the machine and production process, Lianrou pocket spring machines can also use non-woven fabric, cotton fabric, woven fabric, and other fabrics to encapsulate the springs.

Q8. What is the price of an independent pocket spring machine?

The price of a pocket spring machine varies greatly, depending on factors such as production speed, level of automation, spring specifications, number of winding heads and wire frames, high compression technology, and core electrical components. The investment cost of a basic pocket spring machine for small-batch production is vastly different from that of a high-speed, fully automated independent pocket spring production line. Therefore, mattress manufacturers should compare overall production plans, comprehensively considering machine performance, lifespan, output, labor requirements, energy consumption, spare parts, installation, training, and after-sales service.