Circular knitting

Knitted fabrics on large-diameter circular knitting machines are manufactured as endless tubular fabric with a circular array of knitting needles. In double-jersey machines, needles are arranged in both the cylinder and in the dial, while single-jersey machines use knitting-machine needles as well as sinkers. In shirtmaking on bodysize machines, for example, this eliminates lateral seams. This is particularly advantageous for skintight clothing.

Typical application fields in circular knitting include the manufacture of outerwear such as T-shirts, leisure and sportswear, underwear and sleepwear, among them bra fabrics and technical textiles such as smart shirts.

However, knitted fabrics on seamless bodysize machines, in contrast to large diameter circular knitting machines, are manufactured as individual items and not pulled off as tubular fabric, but rather ejected individually. Circular knitting machines with corresponding diameters are used for the different fabric sizes. For this Groz-Beckert provides high performing needles and system parts such as knitting cylinders.

Typical application fields are the manufacture of medical textiles, underwear and outdoor underwear, bodys and swimwear.

Thanks to a wide variety of options, circular knitting technology is perfect for manufacturing stylish and functional textiles – from undershirts and T-shirts to upscale sportswear.

Circular-knit fabric provides many benefits: it is elastic, seamless and cost-saving to produce and can be used almost anywhere. This flexibility makes it of particular interest to the clothing industry.

The manufacture of clothing is the largest application field in circular knitting. Different fabric structures and gauges provide for an enormous variety of designs and functions. High requirements are made on functional knitted fabrics for sportswear; for instance on their stability and moisture-wicking. Beyond that, T-shirt and sweatshirt fabrics must be fashionable, whereas comfort is the main consideration for underwear.

Clothing

A somewhat unfamiliar field of application for circular-knitting technology is the knitting of mattress fabrics. There is presently a change in technology taking place – away from weaving to the more cost-effective and flexible knitting.

In contrast to woven mattress fabrics, knitted fabric is elastic and provides other advantages that a woven fabric cannot offer without using cost-intensive yarns. These include greater fabric volume, higher fabric flexibility and air permeability. Everything needed for a good night's sleep.

The higher flexibility and elasticity, in particular, make knitted mattress fabrics interesting, since they better adapt to body movement.

Knitted fabrics also offer more patterning options. End users thus dispose of a greater selection of patterns so that the product range correspondingly expands.

Home textiles

Whether upholstery, headrests, door panels or roof liner – knitted fabric is ubiquitous in automobiles, although not necessarily visible at first glance. Knitted fabrics play an important role in the automobile industry. Especially in car interiors, there are amazingly many knitted constituent parts.

High requirements are made for the products. Safety standards are high, and design and functionality of extreme importance. Especially in vehicle interiors, textiles are exposed to solar radiation and high temperatures. Knitted fabric must withstand these stresses for many years.

Lastly, the higher elasticity and tensile strength of knitted textiles make them the go-to choice. Because of the higher elasticity the knitted fabric is more suited to draping and can be used anywhere.

In addition to textiles made of knitted yarns, knitted fabric made of other materials, such as metal, are also used. They can be found in radiator hoses, airbags and vibration absorbers.

Technical textiles

Groz-Beckert offers customized systems and solutions in accordance with customer needs. As a development partner, Groz-Beckert maintains good relationships with many renowned machine builders, knitting mills and institutes.

Custom-tailored solutions

Latch needles

Groz-Beckert has the widest range of latch needles and provides service for all applications – and in gauges up to E90.

litespeed® and litespeed® plus

litespeed® needles have been designed for use in circular knitting machines. They lower machine temperature and cut power consumption for noticeable cost reduction.

Vo-LC™ needle

The manufacture of ultra-fine knitted fabric requires high needle precision. Groz-Beckert offers the optimal solution with the impressive features of the Vo-LC™ needle.

G00 Technology

The G00 technology prevents streaks caused by bent-open hooks. This facilitates increased process reliability at maximum productivity, as well as reduced fabric waste.

Transfer needle

With this special needle technology, loops can be transferred to adjacent or opposite-side needles. This increases the variety of patterns on the machines employed.

Spring-loaded latch needles

The specific build of the needle, which provides for automatic lifting of the needle latch in closing and open position, delivers many benefits to the loop formation process.

Steel composite needle

The needle with double low profile provides ideal damping for high-speed use. The cut-outs of the needle are filled with a special plastic to prevent the accumulation of dirt.

Sinkers

Groz-Beckert sinkers ensure a uniform long-term knitting process and flawless fabric. Short setting periods and reduced idle times provide for high productivity.

Sinkers

Selected parts

Secured spring force, constant reaction time and good rounding ensure reliable functioning of selected elements. This prevents erroneous selection, thus increasing customer profits.

Coupling parts

Coupling parts are used as connecting elements between needles and selected part. Coupling parts play an especially important role in the manufacture of jacquard patterns.

Separator

The separator is used as connecting piece between needle and selection element. It ensures that a specified needle is securely positioned and performs the right knitting function.

Holding-down jack

During the loop-formation process, holding-down jacks ensure that the knitted fabric does not ride up, replacing the holding-down function of the sinker.

Cylinder

Groz-Beckert cylinders are highly precise, highly wear-resistant and have a long service life. The gauges run from E3–E90 and are supplied for single-jersey and double-jersey machines.

As a full-service provider of cylinders, needles and sinkers, Groz-Beckert offers its customers systems precisely customized to their requirements. High production accuracy minimizes knitting-in and changeover time when changing cylinders and boosts productivity. Groz-Beckert also develops custom-made products upon request. Diameters of up to 60 inches are possible.

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