EuroWire May 2016

News Technology

New tapes for the aerospace composite industry

pass the ASTM E595 low out-gassing test for no out-gassing contamination They use a 1mm film and 2mm film, respectively, and both are very conformable. DeWAL’s PTFE tape for use as composite tool coat is DW716-2HD. The printable glass tape DW379 is used in aerospace blanket seaming and also as a wire harness and transformer wrap. The fourth tape in this new series, DW417, is a flexible dead soft foil supplied on a release liner. The aluminium laminate makes it an ideal heat shield tape. As with the polyester tapes, the other three tapes also pass the EMS 595 requirement and offer low out-gassing, silicone-free operation.

DeWAL Industries has introduced a new line of high temperature, silicone-free adhesive tapes for the aerospace composite industry. The tapes are suitable for low out-gassing applications requiring EMS 595. The group includes a woven glass tape, a foil/glass laminate tape, a red polyester tape and high density PTFE. It is becoming an ever-increasing problem in sensitive manufacturing processes to introduce silicone elements. DeWAL has addressed this issue by formulating the most popular tapes in versions which contain no silicone. While suitable for the aerospace composite industry, they are additionally used in automotive and electronic applications where silicone can also be of concern. DeWAL’s new polyester tapes for composite lay-up are DW 915-1 and DW915-2. They are 100 per cent silicone-free, offering a high temperature, high bond, clean release acrylic adhesive. Both

DeWAL Industries – USA Website : www.dewal.com

Versatile easylock fast clamping system

Originally developed for the food industries, the Uhing-easylock® clamping system has long since found its way into other sectors as well. It is sought after for production processes using winders or coilers or where safe and efficient clamping or locking is essential. the Uhing-easylock are the processes in the wire and cable industries where the torque transfer the clamping system provides is of particular importance. The axially displaceable Uhing-easylock features a clamping ring that, when subjected to axial tensioning forces, tilts on the shaft and engages with it. The locking effect is proportional to the tensioning force. the Uhing-easylock holds and locks roll cores of foils and other material, and it is also used to quickly adjust material guides. As operating the clamping module does not require any tools, the work environment remains free of utensils such as wrenches. Changing the clamping module occurs quickly and easily with only one hand. the Uhing-easylock clamping module is a key feature in static applications where high locking forces are required, for example in screening machines. Once again, the module convinces by its easy and effective handling. It can be unlocked quickly with only one hand and mounted in a very short time after a screen change, and screening can continue. A special positive release add-on module was developed for the Uhing-easylock fast clamping system. It makes changing filled spools easier if the clamping disc A classical application for In packaging technology, The vibration proofness of

▲ ▲ The easylock EL10 from Uhing

clamping task. The simple transmission of braking moments to the roll or spool also translates to a high degree of safety in case an emergency stop is needed.” The lightweight, ergonomically designed clamping module generating high locking forces on a plain shaft is suited for static applications but also for driven shafts with unmachined surfaces. It comes in ten different sizes for shaft diameters between 10 and 40mm; the clamping module with integrated positive release is available for shaft diameters between 25 and 40mm. The required surface hardness of the shaft is at least 55 HRC for a surface roughness Ra of 0.2-0.4 µm.

should fail to unlock. This can happen if a residual force still acts against the tensioning wheel although it was fully turned back. A residual force may remain if, for example, a spool still rests on the pintle after unclamping, or if the spool has expanded during winding. As a result, the locking ring may fail to return to its perpendicular position, which makes unlocking difficult or totally impossible. The positive release becomes effective when the clamping wheel is turned to its rear limit position, which is done with one hand only. “The compact Uhing-easylock® clamping module features an axially symmetric, modular design,” said Jörg Wadehn, Uhing technical director. “In this way, it can be easily adapted to suit the respective

Joachim Uhing GmbH & Co KG – Germany Website : www.uhing.com

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May 2016