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Compamed in Düsseldorf

Compamed in Düsseldorf

News 17.11.2022

At the Compamed, the international trade fair for medical suppliers and product developers held in Düsseldorf / Germany from 14 to 17 November 2022, WITTMANN BATTENFELD is demonstrating its expertise in liquid silicone processing by manufacturing a membrane made of thermoplastic and liquid silicone for a high-quality micro loudspeaker.

wiba pm 13 2022 compamed micropower 15 10 10 web

The membrane is manufactured on a MicroPower15/10H/10H Combimould with a single-cavity mold supplied by Starlim Spritzguss GmbH, Austria. The machine is a MicroPower in multi-component version. It is equipped with a 2-step screw-and-plunger thermoplastic aggregate and a 2-step screw-and-plunger LSR aggregate as well as a rotary table integrated in the machine. The rotary table takes care of turning the part towards the second injection unit and back. The machine is also laid out for clean-room injection molding. Its rotary table is completely encapsulated. All connections for heating aggregates, temperature sensors, water tempering, core pull pneumatics and sensors, as well as the blow-through valve, are installed close to the rotary disk. The resulting short connection lines to the mold enhance the machine’s user friendliness.

wiba pm 13 2022 compamed membrane web

The choice of a single-cavity mold serves to demonstrate the high precision of the mold in combination with the machine, which is specially designed for the production of micro parts.

It is often necessary to build costly multi-cavity molds already at the prototyping stage for the sole purpose of reaching the necessary minimum throughput of the machine.

The LSR metering pump supplied by EMT Dosiertechnik, Germany, is a 1-liter cartridge system developed for extremely small metering volumes. Smooth, continuous emptying of the cartridges ensures highest precision together with consistent quality.

Another advantage is the blending section reduced to a minimum, with the special benefit of rapid cleaning and minimal material loss with every material changeover.

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