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⑶IRHD袖珍硬度试验这是为了能简单地套用国际橡胶硬度(IRHD)而提出的试验。试验机与硬度计非常相似。通过直径为1.575mm的半球形压针使试片变形的弹簧力规定为2.65±0.15N,压针上下移动的行程为1.65mm。实际制品中,在挠性变形小的范围内使用盘簧等近似固定载荷的弹簧。压针的压入深度与IRHD的关系是:压针从加压板突出
⑶ IRHD Pocket Hardness Test This is a test that has been made to easily apply International Rubber Hardness (IRHD). Tester and durometer are very similar. The spring force for deforming the test piece through a semispherical crimper with a diameter of 1.575 mm is set to be 2.65 ± 0.15N and the stroke for moving the platen up and down is 1.65 mm. In the actual product, a spring having a nearly fixed load, such as a coil spring, is used within a range where the amount of flexural deformation is small. The depth of the press-in pin and the IRHD are: The press pin protrudes from the press plate