From the Sector

Together with the German circular knitting machine builder Mayer & Cie., Groz-Beckert has developed the optimized Relanit sinker SNK F over the past years. Independently of this, the development of the new LCmax™ energy-saving needles took place. The focus of both developments is on efficiency, energy savings and increased process reliability.

Groz-Beckert offers interested machine builders different cooperation options to jointly develop new products or optimize existing ones. The Groz-Beckert Technology and Development Center (TEZ) provides the appropriate framework for so-called co-development projects. At the ITMA in Milan in June 2023, Groz-Beckert presented some of the successful cooperations under the motto "Innovation through cooperation". Among them were two new developments realized with Mayer & Cie. Groz-Beckert presented the two new products for the first time in Asia at ITMA Asia in November 2023.

Optimized Relanit sinker SNK F
At the end of 2018, circular knitting machine manufacturer Mayer & Cie. approached Groz-Beckert with a request to jointly develop an improved and more efficient sinker for selected machines of their Relanit family that would run more smoothly and reliably in the needle tricks. The innovative sinker has an integral spring with a spring force that is adapted to the sinker thickness. Field tests were consistently successful and confirmed the functionality and advantages of the new sinker.

Thanks to their adapted spring, the newly developed SNK F Relanit sinkers are securely guided while they are running through the cam track, resulting in a quieter operation. This increases process reliability and ensures an improved loop structure. In addition, wear on the swivel butts of the sinkers is reduced. This increases service life and makes the process more sustainable and cost-efficient.

Higher energy efficiency thanks to LCmax™
The objective second recent cooperation with Mayer & Cie. was to develop a cost-effective energy-saving needle. After considering various variants, the common choice of Mayer & Cie. and Groz-Beckert was the LCmax™ knitting machine needle with innovative, wave-shaped shank geometry. The first prototypes were extensively tested on laboratory machines at Groz-Beckert's TEZ.

The wave-shaped shank of the LCmax™ needle ensures a smaller contact area of the needle in the needle trick. This results in less friction, which reduces machine temperature and enables energy savings of up to 20 percent compared to a standard needle. This saves costs and at the same time allows operation of the machine at the maximum possible speed.

In both projects, the cooperation between Mayer & Cie. and Groz-Beckert went far beyond mere product development. In addition to Applications Engineering and Construction, the companies' Sales and Purchasing departments were also involved in a close exchange.

This month, the circular knitting machine manufacturer Mayer & Cie. is launching its upgrade kits for circular knitting machines that are already successfully in use by customers. With tailor-made packages, the company wants to give its users the opportunity to take advantage of technological progress in their existing machines. The aim is to improve the performance of the existing machines and to extend their service life. In addition to the machine-specific upgrade kits, the company now starts offering tailormade spare parts packages. They are intended to ensure machine availability and equip customers with spare parts for standard situations. In addition, they offer a degree of independence from possible failures in the supply chain and rising transport costs.

Longevity, a popular product property
“Longevity of our circular knitting machines is definitely a property that our satisfied customers mention regularly”, Mayer & Cie. sales director Wolfgang Müller says. The company estimates that up to 50 percent of all the circular knitting machines it has ever made are still around in the market somewhere.

Upgrades boost performance and value
Value retention, maintenance and upgrades for existing machines are a key issue for the company – and for the customers who successfully use existing Mayer & Cie equipment. That’s why the company recently launched customised upgrade kits to improve the long-term performance of machines.

Low budget, clear benefit
Compared to a new machine, upgrade kits are a low-cost investment that deliver clearly defined benefits. For example, an improved yarn guide ensures a significant increase in the plating reliability and output of the machine in question.

Most of the upgrade kits is machine-specific; the aforementioned yarn guide ensures a boost in productivity for the Relanit 3.2 II and Relanit 3.2 S. For S4 machines an optimised fluff blowing device can be the solution. It ensures that less fluff is knitted in and thereby improves the fabric quality. It also reduces downtimes that would otherwise be required for cleaning. Upgrade kits suitable for most Mayer & Cie. machines are the edge trimmer to open a fabric hose before the fabric’s rolling-up and the laying facility for high-quality hose fabric.

Spare part packages: Inside is what is required
In addition to individual upgrade kits Mayer & Cie. now offers spare parts packages. They too are customised for individual machines. When purchasing a machine, the customer can also order a small or a large spare parts package. Selected specially for the machine in question, it contains the most important consumables and spare parts.
The new spare parts packages also increase customers’ independence of supply chain failures and rising transport costs.