Mould for processing plastic compositions, in particular a plastics injection mould

摘要

In the case of a mould for processing plastic compositions, in particular a plastics injection mould (10), for monitoring a changeable relative position of two mould elements, in particular two mould plates (19, 15) a magnet (27) is provided as a field exciter and a magnetic field is provided as an electromagnetic field. The monitoring sensor is a magnetic sensor (24). The magnet (27) is fixedly assigned in its spatial position with respect to the one mould element (for example 19) and is moreover spatially separate from the magnet sensor (24). A reference part (for example at 23) influencing the magnetic field consists of magnetically conductive material and is assigned to the other mould element (15). Magnet sensor (24), magnet (27) and reference part (for example at 23) are jointly passed through by the magnetic lines of force. The monitoring arrangement allows versatile use, in particular independently of the thermal loading of a mould. <IMAGE>