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High dosing accuracy at smallest shot volumes

News 10.05.2018

At the German Rubber Conference in Nuremberg, that will take place from 2nd to 5th July 2018, BOY will present the processing of Elastomers and Silicones on two BOY Injection Moulding Machines. An interesting possibility for the processing of two-component liquid silicone will be shown.

BOY XS UV vernetztes LSR

BOY XS with 8 mm Silicone-unit for the UV-cross-linking of LSR

Michael Kleinebrahm, Head of BOY Application Technology, comments: "During the four-day fair we will produce on a BOY XS with a new 8 mm diameter Silicone-unit small-size LSR-sealing rings, which will cross-link in the mould under the influence of UV-light within the shortest time. With this kind of application long flow channels or thin-walled components do not pose a problem.”

The lower temperature level during the processing paves the way to exploit additional areas of use and product applications with new material additives. For example, in the medical field, additives can be processed that normally cannot be exposed to high temperatures for a longer period of time. In cooperation with the University of Kassel, the company EMT Dosiertechnik and BOY a sealing ring mould for this "cool" process has been optimized for the UV-cross-linking in the mould. The transparent mould cavities are surrounded by a UV-lamp with precisely defined radiation. Only when the radiator is switched on the cross-linking of the two-component Silicone in the filled mould will start.

The small 8 mm screw-piston-plasticizing-unit of the BOY XS offers a high dosing accuracy at smallest shot volumes for the micro injection moulding of Silicone. Due to the extremely small mass volume in front of the backflow valve and a special micro-valve gate nozzle from Emde Industrie-Technik GmbH, the processes run precisely and clearly defined. Both, the quality and the consistency of the components are getting more precisely. With the application demonstrated at the DKT, the injection-moulded parts with 0.06 cm? shot volume show a high reproducible-accurate weight constancy.

BOY's presence at the DKT 2018 will be completed by an Elastomer application on a BOY 35 E. The compact, 4-tie-bar Injection Moulding Machine produces rubber seals which are removed from the mould by an integrated brushing device after every shot.

With the two exhibits, BOY once again demonstrates its many years of competence in the processing of Elastomers and Silicones. The BOY exhibition team is looking forward to welcoming many visitors at the BOY booth.

About BOY
Dr. Boy GmbH & Co. KG is one of the leading worldwide manufacturers of injection moulding machines with clamping forces up to 1,000 kN. The very compact, durable machines work precise, energy-saving and therefore highly economical. BOY continually sets new standards in our industry with innovative concepts and solutions. Since the company was founded in 1968 nearly 50,000 Injection Moulding Machines have been delivered worldwide. The privately owned company continues to put special emphasis on engineered performance and high-class "made in Germany" workmanship.

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