The method in accordance with the invention and its apparatus allow controlling the processing of fibres or flocks in the carding machine in an optimal way. The fibre flow is absolutely controlled by achieving a transfer factor equal to one.
This means that the fibres are doffed from the cylinder as they pass through the carding zone between the cylinder and flats with out being allowed to make a second revolution. The processing of fibres in the carding machine is thus optimized by maintaining lowest damage to the fibres i.e., fibre shortening or nep generation.
The invention essentially and drastically changes the accepted and known art of achieving carding action and productivity through increased rotational speeds of the licker-in roller or rollers, cylinder and doffer.
Licker-in, cylinder and doffer are rotated at speeds just needed to give the required total draft of around 100 -150. Draft is distributed between feed roller – Licker-in zone, licker-in cylinder zone and cylinder – doffer zone. Thus the surface speeds of the licker-in, cylinder and doffer are maintained so that the required draft in the material flow is achieved.
Another possible solution lies in a pneumatic doffing device, which can doff the fibres completely from the cylinder surface and at the same time produce a completely straightened fibre arrangement in the sliver without hook formation, because of the air current induced tension.
