The Bonnell spring coiling machine is a specialized automated industrial device designed for mass production of Bonnell springs, the traditional hourglass-shaped coil springs widely used in mattresses and upholstered furniture. As core equipment in the bedding manufacturing industry, it integrates wire processing, shaping and forming procedures to deliver standardized spring production with high efficiency and stability.
This machine operates with a fully automated workflow. It first feeds and straightens high-tensile steel wires to eliminate bends and defects. With precision mechanical rollers and customized dies, the equipment coils the steel wire into the unique Bonnell structure—wider at both ends and narrower in the middle. It further forms interlocking loops on spring ends, enabling tight connection between adjacent springs. Modern models adopt PLC and servo control systems, allowing precise adjustment of spring height, coil turns and wire length via a touch screen.
Featuring outstanding operational advantages, the machine ensures consistent product accuracy and minimizes manual errors. It supports continuous high-speed production, greatly improving manufacturing capacity compared with traditional manual or semi-automatic methods. Additionally, built-in automatic heat treatment and self-lubrication systems extend machine service life and stabilize spring elasticity and durability.
Widely adopted in mattress and sofa manufacturing factories worldwide, it lays a solid foundation for producing elastic, supportive and long-lasting furniture products. With the booming demand for comfortable home furnishings, the intelligent and high-efficiency Bonnell spring coiling machine remains an indispensable facility in the modern upholstery manufacturing chain.
