测定密实弹性体的硬度,通常可用肖氏A 硬度计,当硬度范围在HSA20～90之间时能准确测出,超出此范围时,测量精度及重复精度就较差。由于肖氏A 压头前端是一个平截头锥体,所加负荷又较高,在测量泡沫材料时,由于压头的刺入,将使试件损坏。有时在测量经过机加工的零件时,压头也有可能停滞在泡沫工件表面的多孔气囊中,因而使读数出现严重失真。为避免上述问题,泡沫材料的硬度可用肖氏○测定,它是使用一个球形压头,测量 Determination of dense elastomer hardness, usually available Shore A durometer, when the hardness range between HSA20 ~ 90 can accurately measure, beyond this range, the measurement accuracy and repeatability is poor. As the front of the Shore A pressure head is a frustum cone, the load is higher, in the measurement of foam, due to the piercing head, will make the specimen damage. Sometimes when measuring machined parts, the indenter may also stagnate in the porous pocket on the surface of the foam workpiece, causing serious distortion in the readings. In order to avoid the above problem, the hardness of the foam can be measured in terms of Shore ○, which is measured using a spherical indenter