Solutions equipment engineering

Reed switch production machine

For the production of a spark free, explosion safe and separated galvanic separated reed-switch, Simac developed a high quality production line together with multiple inspection stations, functional testing and automatic packaging unit.

This high quality production line is now in use for more than twenty-five years and the demand for high quality secure functioning switches is still growing.  

Principle of a reed switch

For a correct line-up of the electrodes the individual electrode are fed into a trill feeder which supplies the electrodes on the correct pitch.

The next step is then the feeding of these lined-up electrodes into a welding machine where the electrodes are welded on a steel-cam for optimal handling.

                       Trill feeder to line up the electrodes (an electrode
                       is about 30 mm long)

In the welding area the electrodes are fixed on a steel cam. This cams makes it possible to produce a batch of switches in the glass pressing-oven.

        Feeding of electrodes into the welding machine


        Electrode welding machine

In a closed chamber the two electrodes are melted into the glass tube. The product is now ready for  a dimensional machine vision test.

Dimensional inspection machine


       Design of the dimensional inspection station


Dimensional inspection machine vision inspection program.
Fault detection: broken glass-electrode fixing and glass-cracks


After this dimensional test the correct switches are then reloaded into the functional testing line where the switches are electrical being classified on the individual switch characteristics. This electrical classification determines at which station the switch is supplied and packed as end product. 

          Feeding into the functional testing line  


    Reeds line up before functional test


        Measuring and packaging stations

The used mechanical constructions has over the years proven to be fully sufficient to support the continues production process and even after twenty five years the product quality produced has not been surpassed by newly designed machines.