Roemheld's M-TECS magnetic clamping system is designed specifically for horizontal and vertical die casting machines. Because the system is stable up to 230°C, it largely covers the whole temperature range that may occur in the die casting industry. Additional benefits cited by the company include no downtime for heating up or cooling down in the press, a shorter stay in the hot area with less burning, no T-slot between the heating plate and the die, and more homogeneous temperatures inside the die.
The Roemheld M-TECS system has a variety of safety features. The clamped condition, the temperature and the mould position in automatic operation are constantly monitored. The electrical permanent magnet clamping system is firmly kept in place even in the case of a power failure. Electricity is just required for just 1 or 2 seconds to magnetise (clamp) the system, which then works independently of any power source. Electricity is only needed again for unclamping. The slightest movement of one half of the die causes the machine to stop. An indicator lamp on the remote pendant constantly signals the actual condition of the system.
The M-TECS system uses a very flat, strong magnetic field to generate the magnetic force that penetrates the die base plate by just a few millimetres and therefore has no impact on the workpiece. Magnetic forces between 2 and 5 kg/cm² can be attained, depending on the surface – the larger the die the higher the magnetic forces. Clamping forces of, for example, 500, 1,000 or 2,000 kN can be achieved and these can be adapted to suit the needs of the machine.
The Roemheld M-TECS magnetic clamping system is suitable for fitting onto existing die casting machines or can be incorporated into new ones. The system specification is flexible. The size and shape of the magnetic plates can be determined to suit customers' requirements. The plates have thicknesses of about 55 mm and additional holes for ejector, centring rings/positioning pins as well as clearance holes for punchings (metal forming) can be easily integrated.
Dies, even if non-standard ones, can be easily and swiftly changed. An evenly distributed clamping force all over the clamping surface minimises clamping distortion, which results in higher product quality and reduced tool wear, and with no moving parts, the system is basically maintenance-free, says Roemheld.