In the cure metre test cavity, a test sample of vulcanizable rubber compound is placed, and after a closure action, it is enclosed in a sealed cavity under positive pressure. The cavity is kept at a higher-than-normal vulcanization temperature. After the dies are closed, a biconical disc is completely encased in rubber. The test specimen experiences a shear strain as a result of the disc oscillating via a short rotating amplitude (1° or 3°). As a function of time, the force needed to rotate or oscillate the disc at its greatest amplitude is continually recorded, with force being proportional to the shear modulus (stiffness) of the test specimen at the test temperature.

The test is considered to be finished when the recorded torque reaches its equilibrium or maximum value or when the allotted amount of time has passed.

NextGen’s Oscillating / Automatic Disc Rheometer (ODR) complies with ASTM D2084 Standard.

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