Method and apparatus for testing chew-out strength of paperboard core.

摘要

An apparatus for testing the chew-out strength of a tubular core comprises a clamp for clamping the core to prevent rotation of the core. A splined chuck element is partially inserted into one end of the core and comprises an axially tapered member having a number of axially elongate splines distributed circumferentially on the exterior surface. An insertion mechanism inserts the splined chuck element into the core to positively engage and embed the splines of the splined chuck element into the first end face of the core at a predetermined axial force. A torquing device applies increasing torque at a controlled rate to the splined chuck element. A force representative of the torque is applied to the splined chuck element.