Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1997-05-29
1998-05-19
Dombroske, George M.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73860, 73805, G01N 308
Patent
active
057538220
ABSTRACT:
A method and device for determining the green tack of rubber blends. To obtain reliable and reproducible measurement results it is proposed to use two specimens (40') of rubber blends, the green tack of which is to be determined. Each of the specimens (40') comprises a measurement surface area (42) having a convex curvature, with which the specimens (40') are placed one on the other. During a predetermined time the specimens (40') are compressed at a predetermined pressure and subsequently parted from each other at a constant rate to determine the maximum parting force. The curved measurement surface areas (42) are generated by a specimen (40) being placed on the specimen platform (34) of a specimen mount (26, 28). Subsequently an orifice disk (36) is placed on the specimen (40) and locked in place in the compressed condition, for instance, by being firmly bolted in place. Due to the pressure on the orifice disk (36) the specimen (40) is forced therethrough and bulges outwardly through the orifice (38) of the orifice disk (36). Thus, a consistent measurement surface area is employed.
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patent: 5049057 (1991-09-01), Yamaguchi et al.
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Dombroske George M.
Noori Max H.
Pirelli Reifenwerke GmbH
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