A key challenge for the thin-wall injection moulding process is the 0.5mm average wall thickness of the bobbin, with the thinnest part less than 0.4mm, meaning the risk of the part warping during moulding is high. This was overcome through the application of an in-mould vision pressure sensor.
For the insertion of the bobbin’s ‘golden wire’ – which requires sufficient torque to achieve the necessary coil welding requirements – RPC Ace Shanghai’s innovative high-precision insert moulding technology enables the mould to integrate stamping, cutting and coiling marking.