Durkopp Adler has made the automatic eyelet buttonholer 581 that delivers the necessary speed, with the compact Festo solenoid valves, VUVG. With Festo valves, it takes just under four seconds to create a buttonhole. Durkopp Adler is a leader in the sewing machine and automatic sewing machine market. Festo is a leader in textile automation technology.

Dürkopp Adler’s automatic sewing machines are much more than just sewing machines. The high-tech automatic machines feature state-of-the-art control technology, multiple thread feeds and automatic cutting systems which cut through the fabric at lightning speed after the buttonhole shape is stitched. The shape and length of the buttonholes are set on the operating panel of the machine. The premium automatic double chainstitch eyelet buttonholer 581 is equipped with a multi-flex cutting system, which allows different buttonholes to be cut without changing knives. Festo solenoid valves VUVG are an important component of these ultra-modern sewing machines. They enable the fabric to be handled and processed extremely quickly and precisely, with the fastest variant for making jeans having a cycle time of just under four seconds, according to Festo.

The high quality and performance of the solenoid valves VUVG prompted the sewing machine manufacturer to intensify cooperation with Festo during the redesign of the automatic double-chainstitch eyelet buttonholer 581 around two years ago. Among the features of the solenoid valve series VUVG that impressed Dürkopp Adler was its wide range of variants.

The high energy density of pneumatic components comes into its own when operating different industrial sewing machines. In addition to greater speed, the high pneumatic forces ensure clean cutting. Cutting blades, punching tools, and cutting blocks cut through even the strongest of fabrics in a matter of seconds. Compact and with high flow rates, solenoid valves VUVG can be integrated not only into new product developments, but also into existing automatic sewing machines. In the automatic double-chainstitch eyelet buttonholer 581, the solenoid valves type VUVG control all pneumatically driven functions.

These include cutting and punching to separate the fabric as well as the pneumatic adjustment of the cutting/punching device itself depending on the size and type of buttonhole. The spreading and clamping of the fabric before stitching the buttonhole are also pneumatically controlled. A further pneumatic clamping mechanism stops the fabric after the buttonhole is produced and pulls it forward slightly so that the thread can be cut off. A pneumatic cylinder then switches off the thread tensioning.

The new automatic double-chainstitch eyelet buttonholer 581 is the world’s fastest machine of its kind. The faster the system, the greater the customer benefits and therefore the company’s competitive edge.

The solenoid valve VUVG is ideal for small parts assembly and electronics and for the food and packaging industry. Electrically and pneumatically actuated, the solenoid valve VUVG can be used as both an individual valve and a valve terminal. One of the unique characteristics of this valve is its optimised footprint with an excellent size/performance ratio. Compact and made from lightweight aluminium, the VUVG saves space in the system and reduces weight. Its 10 bar technology ensures accelerated cycle times, smaller cylinder sizes and a higher energy density. The patented cartridge principle makes the solenoid valve VUVG extremely durable and very reliable.