Industrial low cost temperature measurement in permanent electro-magnetic platens

In automatic production controls a fully knowledge of all the state of the different system is often mandatory. In particular the measurement of many parameters is necessary in order to obtain the desired specification in terms of both safety requirements and protective measures for operator’s safety and in terms of system reliability in compliance with both the international standards and the correct working conditions. In the field of Injection Moulding Machine (IMM) the European Standard EN201 is the reference standard. In particular, the mentioned standard specifies “the essential safety requirements for injection moulding machines for the processing of plastics and/or rubber” and “the safety requirements for the interaction between injection moulding machines and ancillary equipment”. If a magnetic clamping system is used in order to attach the mould to the platens the measure of the temperature of permanent-electro magnetic platens is mandatory. In this paper, after a brief introduction concerning the theory of operation of the permanent-electro magnetic platens, an example of industrial low-cost temperature measurement for permanent-electro magnetic platens is presented and discussed in each aspect. At this aim a theoretical introduction has been presented, and in a second time, actual implementation of the proposed approach is finally depicted and discussed.