CONSTRUCTION OF A PLASTOMETER EMPLOYING PENETRATION TECHNIQUE

RAPID AND HIGH RESOLVABLE METHOD FOR THE MEASUREMENTS OF PLASTICITY AND ITS INHOMOGENEITY OF RUBBER MATERIALS, (III)

Abstract

In order to measure the plasticity of rubberlike materials, an apparatus which can be used on-line with a process was constructed. The plasticity measurement is carried out by inserting a needle at a constant penetrating rate into rubber materials.
Integration of the penetrating stress against the penetration depth, which is obtained by an integration circuit, gives the plasticity value, PW. The reproducibility of the degree of plasticity by the apparatus was
well. The construction and the block diagram of this apparatus are shown.
Reference is made to the normalized condition of the PW measurement.