Based on partnership
Festo has been a key pneumatic partner of Dürkopp Adler for many years. 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. With a modular design making them suitable for use as both a valve terminal and individual valves, solenoid valves VUVG combine high performance with short switching times and minimum space requirements. Another important argument in favour of choosing Festo as a technology partner was the global availability of spare parts.
As innovative technology partners and suppliers of high-quality products, Festo and Dürkopp Adler both benefited from stepping up their cooperation. For example, as the relative humidity in textile production facilities in the Far East requires greater protection for machines, the IP class of the solenoid valves VUVG was increased to IP65.
Speed and force
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. The thread tensioning is then switched off by a pneumatic cylinder.