APPLICATION TECHNOLOGY
Huntsman drives sustainability T
Working in partnership with Huntsman Advanced Materials, the National Institute of Applied Science and Paul Sabatier University have designed and manufactured a lightweight, energy efficient vehicle.
he TIM 05 demonstrates the possibilities of making a vehicle using environmentally sustainable components, weighing just 27kg and running on bio-ethanol fuel. To maximise its performance and achieve the best power-to-weight ratio, the students and professors involved in the project decided to use composite materials in designing the TIM 05. The body, made of a sandwich of polystyrene and silk reinforced with carbon, and the chassis, made from unidirectional
carbon and foam laminate are laminated by hand lay-up process with Araldite®
LY 5052/Aradur® 5052.
Huntsman highlights that this low viscosity epoxy resin was selected for its easy handling behaviour and excellent mechanical and dynamic properties in the production of laminates. Araldite® 2011, a two component epoxy adhesive has also been used to bond many other details on the vehicle. “This project shows how Huntsman
products are enablers for green technologies and reinforces the company’s philosophy that innovation and technical advance is balanced with sustainability.” Huntsman is now working with
teams from other leading European educational institutions to assist with projects focused on designing, building and driving the most fuel-efficient vehicles.
Innovative anti-removal system
In light of the constantly developing industrial expertise in every sector of industry the need to protect what are often highly sensitive applications from unauthorised use is becoming of ever greater importance.
O
ne example is in the regenerative energy sector, where solar modules have to be protected against theft and intelligent fastening mechanisms are required to guarantee operational safety. For many years, such applications have been secured using a special
kind of fastener. Many methods exist, from the breakaway screw and nut, safety drives which can be removed only with a special screw wrench, to small steel balls inserted into the screw drive, all of which produce variable practical results. Arnold Umformtechnik, based in Germany, believes that there is a need for optimisation, particularly as regards to removal protection security and
processing speed improvement, which is why it is offering the LocTec® screw drive as an alternative to the systems used up to now. The LocTec® is a special combination of screw drive and tool, meaning that a fastener can be removed only with the aid of the
tool and then only by destroying the connection itself. The drive incorporated into the screw head means that the fastener can only be screwed in using a screwdriver tool adapted specifically to the fastener. Whilst there are countless such combinations in the industry, Arnold point out that the LocTec®
drive’s flank position makes it
impossible to remove the fastener, even using the special tool which was used to fit it in the first place. Any attempt to do so simply causes the screwdriver to screw itself out of the screw head. The joint can only be taken apart by mechanically drilling the screw or by milling a groove and both these ways will inevitably invalidate any warranty claims, and any potential thief would be put off by the considerable amount of noise the procedure would make. Arnold highlights that with the LocTec®
system it is not necessary to make any changes to the fastening machinery, the screw
position or the process technology, and the system can be supplied in individually customisable designs and is available for all standard screw and nut types.
100 Fastener + Fixing Magazine • Issue 69 May 2011
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