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Sophisticated LED lenses made of LSR

Source:International Plastics News for Asia

Date Published:10/22/2018 10:10:12 AM

ENGEL and Dow Silicones developed a solution for cost-effective production of LED lenses with a highly demanding geometry using ENGEL LSR injection moulding machines.  
Liquid silicone rubber (LSR) can be processed efficiently in injection moulding and also scores with excellent material resistance. Without doubt, LSR has become the material of choice for a wide range of complex products. It has also become increasingly important as a material for optical lenses. 
 
At Fakuma 2018, from October 16 to 20 in Friedrichshafen, Germany, system partners ENGEL, ACH-Solution and Dow Silicones present for the first time in Europe, an integrated solution for cost-effective production of LED lenses with a highly demanding geometry. ENGEL has been actively innovating in LSR injection moulding with machine models specifically serving the needs of this niche sector. 
 
At the Dow Silicones stand, lenses for LED headlamps will be produced on a tie-bar-less ENGEL e-victory 310/120 injection moulding machine, with an integrated ENGEL viper 40 linear robot, in a two-cavity cold runner mould by ACH-Solution (Fischlham, Austria). The lenses are representative of a wide range of applications. Apart from the automotive industry, LSR is becoming increasingly important for building and street lighting. The reason for this is the material characteristics. Highly transparent grades for optical applications have a lower yellowing index than conventional thermoplastic lens materials. They are extremely resistant to environmental influences such as UV radiation and can be used over a wide temperature range from

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