Product Description

CCSi designs and manufactures high quality specimen cutting dies completely inhouse at our facility in Akron, OH. Our complete vertical integration allows CCSi to provide exceptional quality dies at competitive prices.

Our process starts with high, quality American made tool steel. We then grind, machine, harden, wire EDM, sharpen, and dimensionally certify the dies. The wire EDM manufacturing process creates perfectly vertical interior walls. This allows the die to be sharpened repeatedly without altering the dimensional characteristics of the sample and provides excellent long term value.

All CCSi dies come with the serial and model number laser engraved for easy identification. Also included is a rugged, foam lined carrying case for protection while the die is not in use.

CCSi manufactures these high quality UltraLife Specimen Cutting Dies for the determination of plasticity and recovery of unvulcanized rubber by means of the parallel plate plastometer, as described in ASTM D926 ‘Standard Test Method for Rubber Property — Plasticity and Recovery (Parallel Plate Method)’.

It is important to note that ISO 2007 ‘Rubber, Unvulcanized — Determination of Plasticity — Rapid Plastimeter Method’ and ASTM D3194 ‘Test Method for Rubber From Natural Sources — Plasticity Retention Index (PRI)’ use a principle similar to this test method and the apparatus, test conditions, and procedures are different. Therefore, the test results may not be correlated.

There is a known difficulty with this test procedure, that being the preparation of the test specimen, which is related to obtaining a specimen of the proper geometry and volume. This is evidenced by the historically poor repeatability and reproducibility, and witnessed by the Precision Statement in the method. These difficulties may be overcome by employing the CCSi Volumetric Specimen Dies, which are of the ‘mated pair’ configuration.

Singly, each die part precisely forms a 16 mm Ø, 5 mm thick cylinder. When they are mated, a specimen is formed having the required volume of 2.00 ± 0.02 cm³, that being a 16 ± 0.02 mm Ø, 10 ± 0.04 mm, thick cylinder.

The CCSi Volumetric Specimen Former features an orifice in each die part to allow for excess air to escape during the forming process. It may also been used for the introduction of compressed air to assist in removing the specimen.

Accuracy may be further improved by using the CCSi Williams’ Parallel Plate Plastometer (Plastimeter) for precisely performing the D926 Plasticity Procedure and the CCSi ASTM D926 Thickness Gauge, which is specifically designed for performing the D926 Recovery Procedure.

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specimen dies, cutting dies, D926, ASTM D926, elastic properties, flow properties, parallel plate plastometer, parallel plate plastimeter, plasticity, plasticity and recovery, plastometer, plastimeter, Williams plastometer, Williams plastimeter, William’s plastometer, William’s plastimeter, Williams’ plastometer, Williams’ plastimeter, Plasticity Retention Index, PRI, Standard Test Method for Rubber Property – Plasticity and Recovery (Parallel Plate Method), D3194, ASTM D3194, Parallel Plate Method.