Processing | electrical & electronic
the process can be seen in this animation . Electrical circuits can also be integrated
into plastic parts using multi-component moulding. Typically more suitable for high volume manufactured components where circuit modifications are not likely to be required (due to the increased tooling cost), the technique can be highly effective. Speaking at last year’s Injection World Molding Forum in Philadelphia, US, Richard Macary, president of specialist 3D-MID producer SelectConnect Technolo- gies, cited the injection moulded chassis for Insulet Corporation’s Omnijet insulin pump as a good example. In the second generation Ominjet device, two-shot moulding is used to integrate the electrical infrastruc- ture that connects the motor, battery, internal pump, communications board and backup system into the chassis moulding of the body-mounted dosing ‘pod’. The process involves the use of platable and non-plata- ble plastics, followed by chemical plating. The first shot is produced in a non-platable polycarbonate. The
second shot, which defines the route of the electrical circuitry, is produced in a special palladium metal- doped blend of PC/ABS blend from RTP Company. A chemical process of
plastics etching, neutralisation with ionic palladium activation, and electroless deposition was used to deposit first copper then
nickel onto the second shot compo- nent. This is achieved in batches of 3,000
parts at a time, making it cost effective for this project.
Click on the links for more information: ❙
www.plasma-innovations.com ❙
www.lpkf.com ❙
www.polyone.com ❙
www.ikv-aachen.de/en/ ❙
www.kraussmaffei.com ❙
www.krallmann.de ❙
www.selectconnecttech.com
Left: A test part with injection moulded metal circuits developed by IKV for Osram
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