Mold Sensors Transmit Data Wirelessly.

Temperature, pressure, or other sensor data can now be transmitted from molds or other movable tooling without the need for hard-wired connections. Power, too, can be transmitted across an air gap with the new Remote Sensor System from Balluff Inc., Florence, Ky. It eliminates the need to disconnect and reconnect thermocouples or pressure transducers when changing molds. It also eliminates the need for a sensor cable long enough to follow the stroke of the moving platen. Slip-ring connections for rotary tables are also unnecessary.

The sensors are wired to one amplifier that remains with the movable or removable tool component. The other amplifier remains permanently mounted in a fixed position on the stationary platen or on the side of the press. When the two amplifiers are aligned, they can transmit and receive signals and power across an air gap of up to 15 mm via passive induction. The system can transmit up to eight sensor signals and eight output signals to trigger auxiliary equipment, plus up to 1 amp of power. The rugged hardware is said to be insensitive to heat, vibration, oil, or dirt.