Dumbbell shaped cutting knife is a sampling tool used for materials such as rubber, plastic, film, composite materials, waterproofing membranes, non-woven fabrics, etc. before experiments; Its specifications and models are numerous, involving multiple national and industry standards. Conventional dumbbell shaped cutters are available in stock, while dumbbell shaped cutters with special requirements or specified in American ASTM and ISO standards can be customized according to drawings.

Requirements for the use of dumbbell shaped cutters:
There are clear regulations on the type and size standards of the cutting blade used for preparing samples, and the inner surface of the cutting edge must be perpendicular, with two cutting edges parallel to each other. Before each experiment, it is necessary to verify whether the size, flatness, angle, etc. of the cutting blade meet the standard requirements. Daily maintenance and inspection should be carried out, paying attention to whether the blade is straight, sharp, dull, cracked, chipped or curled. Any situation can lead to defects in the cut sample, such as the width of the sample, the flatness of the sample edge, the shape of the sample cross-section, etc., which can cause deviation in the detection data. The pad used for cutting dumbbell shaped samples should be a suitable soft and hard adhesive tape or good cardboard, and the testing personnel should ensure that the sample is cut into shape in one go. Too soft a cushion plate can cause deformation of the sample, resulting in a significant difference between the cross-section of the dumbbell shaped specimen and the rectangle; If the pad is too hard, it will damage the dumbbell shaped cutting edge and cause deviation in sample size.