40 FASTENERS AND JOINING/SEALING/SEPARATING
all electronic parts lay in the B-cover with an upper panel above. This means that the A cover is no longer required and the construction is: LCD panel, spacer tape die-cut, lens. With the new spacer tapes the window lens is mounted directly on to the LCD panel and the conventional construction is simplified, which saves weight and space. Furthermore, the new spacer tapes which connect
the lens directly to the core, are waterproof and shock absorbing. The DuploCOLL spacer tapes product range is available in six different tapes which differ in color and performance. For example, black ‘spacer tapes’ are developed in order to absorb the diffused light, while others are transparent, due to design requirements. Spacer tapes with an additional feature can be offered
Fig. 3. Slim phones: double-sided pressure sensitive spacer tapes as die- cuts are an adequate bonding solution.
➠
built up in the usual way. All electronic components are situated between the so-called A- and B-cover. They are bonded in the following way: LCD-panel,
a pressure sensitive foam die-cut, the plastic bar and a pressure sensitive die-cut to fix the lens. Therefore the total thickness between the lens and the display averages from 0.5 to 1 mm, which depends on the multi-layer construction. New slim phones show a different cross section;
too. For example, when the compensation of tension stress is an important feature. For this special application spacer tapes can also be produced as very thin PE-foam die-cuts between 250 and 350 microns. Even here, these foam spacer tapes connect the lens directly with the display. Last but not least all these customised spacer tape utilise high performance with narrow tolerances, constant release properties and are cleanroom qualified. This enables customers to set up a less-sensitive, assembly line for high volume production, which is highly cost efficient. n
Enter 40 or ✔ at
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Christina Barg-Becker is with Lohmann GmbH & Co KG, Neuwied, Germany.
www.Lohmann-Tapes.com
ROTARY SEALING GUIDE IS FOR DESIGN ENGINEERS A
new publication is proving an essential time-saving tool for applications and design engineers working on rotary sealing issues. The new guide, from specialist sealing products manufacturer James Walker, has been published in two parts and focuses on the company’s Walkersele high-efficiency radial lip seals. Part one covers the selection of the correct seal design and material combination to suit each specific rotary application. The highly detailed guide takes the user through operational parameters, performance, material compatibility, housing design and retention methods. This not only helps in accurate
seal specification but is of great assistance in allowing housing and retention issues to
be addressed at the design stage. With the ideal seal/housing /retention combination as an integral part of the design, operational problems can be eliminated. Additional features within the new
Walkersele guide include a detailed section on seal installation techniques, including James Walker’s patented OSJ On-Site Joining technique, plus operational considerations for worn shafts, highly abrasive or corrosive environments, shaft and housing surfaces, and lubrication. Range charts cover both standard metric and inch sizes for split and endless seal variants. This combines with part two of the guide – the Walkersele Mould List – which presents details
of over 4500 Walkerseles for which tooling is held, including a range of large diameter
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TBMS tunnel boring machine seals. “Using this new publication will speed up the whole ordering and delivery process for customers, whether they require a product from our standard mould list or are creating specifications for a custom seal.” Comments James Walker & Co product streams operations director Geoff Teasdale. “New tooling for non-standard sizes can be in-house designed and manufactured within days and by using our new guide, customers will be confident that they are specifying the best possible solution for their rotary sealing application.” The two-part Walkersele Guide can be downloaded in PDF format or a hard copy of Part One ordered directly from the company’s website at
www.jameswalker.biz. n
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James Walker Sealing Products & Services is based in Woking, Surrey www.jameswalker
, UK. .biz
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