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Single fibre linear density- (fineness) and tensile tester FAVIGRAPH Here, the linear density measuring head is situated adjacent to the tensile test section. The innovative characteristic of the FAVIGRAPH is a transfer clamp between the two measuring systems, into which the appropriately pre-tensioned fibre is manually loaded. At the start of the test, the transfer clamp is positioned above the linear density measuring head. First, the linear density of the fibre is determined by using the vibroscopic method, eg according to ASTM D 1577. Thereafter, the transfer clamp turns to the tensile test section and places the fibre into the measuring and draw-off clamp. During the tensile test, it is possible to already insert the next fibre into the linear density measuring head. As a consequence, continuous parallel operation of both systems is ensured. With corresponding short fibre breakage times, cycle times of 15 seconds are easily achieved resulting in a test output of 240 fibres per hour.  Fibre transfer from vibroscopic measuring head to tensile test section Moreover, a special advantage of the FAVIGRAPH is that the operator handles the fibre only once when introducing it into the transfer clamp at the linear density measuring head. Compared to conventional systems, where two independent testing instruments necessitate separate introduction of each fibre, the FAVIGRAPH-technology signifies a substantial reduction in both work input and possible fibre damage. Accessories for tensile testing of single fibres and for tensile testing of fibre bundles are available as optional accessories. |
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