Karl Mayer has introduced two innovative machines - the RMF 8 EL and HDR 9 EL NET - designed for the efficient and economical production of high-performance stone bags used in demanding construction environments. These warp knitting machines cater to different manufacturing approaches: the HDR 9 EL NET produces ready-to-use tubular sacks in one piece, while the RMF 8 EL delivers flat textile sheets for later assembly.
Built for extreme durability, the stone bags are made from coarse net structures using recycled polyester or polyethylene fibres. They can hold stones weighing from one to 12 tonnes, making them ideal for coastal erosion control, bridge pier foundation reinforcement, disaster recovery structures, and temporary road bases. Their resistance to rust and corrosion ensures long service life even under seawater exposure.
The RMF 8 EL offers exceptional flexibility, supporting widths up to 190 inches and multiple gauges (E3, E4, E8, E9) to tailor robustness to specific needs. The HDR 9 EL NET, available in gauges E4 and E7, streamlines production with ready-made net bags that require no sewing or finishing, significantly reducing manufacturing time and labour.
Lightweight yet highly stable, these stone bags are easy to transport, handle, fill, and install, even with crane assistance minimising the need for skilled labour on-site. Their net structures adapt easily to uneven surfaces and effectively fill gaps, ensuring secure placement in varied terrains.
With wide-ranging applications in infrastructure, marine, and emergency construction, Karl Mayer’s new machines deliver versatile, eco-friendly solutions that meet modern industrial demands with speed, precision, and reliability.
