Machine for testing extensible plastic films for packaging
A film and machine technology, applied in the field of testing machines, can solve the problems of expensive film characteristic testing, film manufacturers and film users can not use, can not be used, etc.
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[0042] refer to Figure 1 to Figure 16 , shows a testing machine 1 according to the invention arranged to perform a number of measurements and tests on a film 100 made of plastic to determine its mechanical and physical properties. For example, film 100 is a cold stretchable plastic film type used for wrapping and wrapping objects, packages, products, etc. grouped and arranged in superimposed layers on a pallet to form a pallet load. Schematically, the testing machine 1 comprises a basic structure 2 provided with a support plane 8, an uncoiling station 3, a pre-tensioning station 4, a winding station 5, a plurality of measuring groups 11-16, a plurality of testing groups 17-20, and a plurality of guide rollers 21-24.
[0043] The uncoiling station 3 is provided with unwinding rollers 31 which are driven and / or controlled to rotate about a respective longitudinal axis (in particular almost perpendicular to the support plane 8 ) by a first drive 32 and arranged to support the f...
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