Patent ID: 6652255
Filing Date: 2003-11-25
Classification: D01D,Y10S

Abstract:
A cooling system for filament bundles, which are spun from polymer melt by at least two spinneret units (1) disposed one beside the other and are drawn off by a draw-off system at a speed of &gE;1000 m/min, the filament bundles being cooled by an equidirectional stream of air, the cooling system comprising the following parts directly below the spinneret units (1) a means (12, 13) for supplying air,subsequent thereto a shaft A of rectangular cross-section, constant width between the side walls (4) of the shaft, and a depth tapering in draw-off direction between front and rear walls (5a, 5b) of the shaft, the filament bundles (3a) being drawn off through shaft A and near the exit from shaft A being first of all guided first over a lubrication oiler (6) and thereafter through a first thread guide (8), subsequent to shaft A a shaft B of rectangular cross-section and of a depth tapering in draw-off direction and optionally of a tapering width, the filament bundles (3) being drawn off through shaft B, subsequent to shaft B a shaft C of rectangular, constant cross-section, which shaft C extends to near the draw-off system (17), the filament bundles (3) being supplied to the draw-off system (17) through shaft C, and close to an exit from shaft B means (11) for discharging air, the means for supplying air consisting of a gap (13) between shaft A and the spinneret units (1), which gap is open towards the ambient air and a blow ring (12) which opens into the gap (13) and surrounds the at least two spinneret units (1), end the means for discharging air consists of at least one line (11) with exhauster (11a), which line branches off from shaft B and the air discharged by means of the at least one exhauster (11a) being recirculated to the blow ring (12) and being uniformly distributed over the at least two spinneret units (1).