Roll press instrumentation

Similar to instrumented compression pin, there is a way to instrument an upper or lower instrumented precompression roll pin. Precompression, if it exists on a press, is used for de-aerating and initial tamping of the powder mass in the die and usually helps to achieve the desired hardness without capping or lamination.f The force of precompression is normally a fraction of the compression force. 

The mixtures to be studied on the rotational viscometer were prepared by dissolving varying amounts of the polymethacrylates and PVC in dimethyl formamide at 10% by weight concentration. The samples to be studied by microscopy were prepared by solvent casting from the above mentioned solutions. The blends of PVC and polymethacrylates to be tested on the Rheovibron instrument were obtained by mechanical mixing of the components on a rolling mill, followed by pressing to a foil form. 

The successful elimination of extreme industrial hazards (eg. modification of chainsaws, redesign of controls for power presses, roll-over protection for tractors) are examples of selective, demand-driven regulatory approaches which have been instrumental in reducing fatalities and the incidence... 

---