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英斯特朗优化了用于软生物组织拉伸测试的抓紧装置 - China Medical Device Manufacturer
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Fri, January 19th, 2018

2011年5月CMDM电子快讯 » 技术新知
英斯特朗优化了用于软生物组织拉伸测试的抓紧装置

英斯特朗公司(Instron)进行的一项决定适用于软生物组织张紧测试抓取方法的内部研究表明,在250N的作用力下,Instron公司的2712-019型气动夹具特别适合进行组织样本测试。研究表明,为了避免滑动和样本过早失效,夹具应该有齿颚面。或者,也可以采用平滑的接触面。此外,尤其在使用平滑面的时候,建议使用低砂纸来保证测试结果的可靠性和可重复性。

该研究表明,2712型气动夹具能够调抓紧压力,这使它们适用于测试组织样本和其他如薄片,金属或塑料薄膜等纤巧标本。它可以降低加紧的力度以防止颚部断裂,反之,当标本不断滑动或者需要适应不同的样本宽度时,这种装置还可以使加紧力度增加。在夹紧爪和标本之间使用砂纸,能够保证接触面之间的摩擦更高,并使安装标本更简便,这也同时防止组织与加紧爪的黏合。

2712型气动夹具也同样使用于钳住扁圆型的标本。加紧爪的表面自动调节到样本的厚度,最高可达6毫米,确保通过标本的作用力是在加紧装置的中轴线上。根据测试内容,可以提供具有不同表面的夹具颚面,比如平滑磨削表面、橡胶涂层、或锯齿型表面,还有特殊型号。英斯特朗公司(Instron)气动夹具还可以通过脚踏开关操作。此外,开关可以通过测试设备控制,自动施加预载、或者释放标本碎片的故障。

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