MATERIALS | LIQUID SILICONE RUBBER
Right: Elmet’s Top 5100
dosing system for LSR injection moulding is for 20- and 200-litre drums
exhibit, a Sam-C5 removes tooth covers from the tool and places them in containers on the side of an IntElect 75, to comply with required hygiene standards. The company said that its
OPC-UA programming capabilities and the ability to view data from integrated technology – including dosing systems, multi-cavity tooling and automation – can optimise efficiency in LSR moulding.
Dosing update Elmet has launched its Top 5100 dosing system for liquid silicone rubber (LSR) injection moulding. Suitable for 20- and 200-litre drums, it
replaces the previous Top 5000 version. The full portfolio ranges from the 20-litre Top 700 system to the Top 7000 for 20- and 200-litre drums. Elmet has chosen Silicone Expo Europe, taking place in Amsterdam on 19 and 20 March 2025, as the forum for introducing its new dosing system. Advances compared to its predecessor include:
a more compact design, so that it requires less floor space; optimised pump technology (in terms of sealing technology) for a longer service life; higher resolution of the volume counters for more production precision; and revised software, to raise efficiency. The new model is equipped with an M pump
unit, presented at Fakuma 2024. This enables increased delivery pressure of 230 bar, allowing LSR materials to be processed in a viscosity range from 0.001 Pas to 3000 Pas. This includes carbon black or mineral-filled and self-adhesive materials, which tend to increase in viscosity, as well as abrasive materials, such as thermally conductive
Right: Wacker Elastosil LR 5003 will be made into a water bottle mouthpiece at K2025
materials for the e-mobility sector. “The wide range of options, com- bined with solid conveying technology, makes the Top 5100 an all-rounder among our dosing systems,” said Lukas Linimayr, product and business development manager at Elmet.
Grade extension At K2025 later this year,Wacker will present its new Elastosil eco LR 5003 grade. The non-postcure liquid silicone rubber (LSR) is aimed at the large-scale manufac- ture of products for the food
industry and other sensitive areas. As far as volatiles content are concerned, moulded parts comply with limits stipulated by the German Federal Institute for Risk Assessment (BfR) even without postcuring. They also meet the requirements of the US Food and Drug Administra- tion (FDA) for food-contact products. As a result, it can be used to make products such as drinking straws, baking tins and dough scrapers. During the show, the material will be used to injection-mould mouthpieces for water bottles designed by Air Up, with equipment from Arburg and Rico Elastomere Projecting. Last year, Wacker built a new silicone production
site in Karlovy Vary in the Czech Republic. From the end of 2025, it will produce room-temperature curing silicones – and, from 2028, silicone rubber. The investment, in the ‘low triple-digit million Euros’ range, will create 200 new jobs in the first expansion phase.
Customised silicone elastomers are needed
where conventional materials cannot meet increas- ing requirements, in areas such as electromobility, renewable energies and the expansion of electric- ity grids. “To meet the growing demand for such solu- tions in the long term, we need to lay the necessary groundwork now,” said Christian Kirsten, executive board member at Wacker. The new site complements Wacker’s existing
production sites in Burghausen and Nünchritz, in Germany.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.arburg.com �
www.sumitomo-shi-demag.eu �
www.elmet.com �
www.wacker.com
26 INJECTION WORLD | July/August 2025
www.injectionworld.com
IMAGE: ELMET
IMAGE: WACKER
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