GB1488126A - Textile winding machines with automatic tube change - Google Patents

Abstract

1488126 Continuous winding apparatus; winding transfer tails MASCHINENFABRIK RIETER AG 27 Nov 1974 [14 Dec 1973] 51349/74 Heading D1J The invention relates to winding apparatus of the kind in which there are at least two mandrels 3, 3', Figs. 1 to 3, that can be moved in turn to a tube winding position 5, a filament traversing guide 6, and means 8, 9, 10 for lifting the filament 7, when it is aligned with a notch 17 in a bar 16 out of the guide 6 during package change-over so that the filament 7 is caught by the notch 17 in the bar 16, as in Fig. 3, to hold the filament 7 in the vicinity of a filament catching and cutting zone 19 of the next mandrel to be wound as it is swung into the winding position 5. As shown in Fig. 3 the empty mandrel may initially be displaced in the direction A to bring its catching and cutting zone 19 into alignment with the notch 17. According to the invention the apparatus includes filament displacement means for moving the filament 7 away from the catching and cutting zone 19 onto the receiving tube 4 in a first displacement stage, and for moving the filament further onto the tube 4 in a second displacement stage, the second stage movement being at a higher speed than that of the first stage. The second stage movement is used to wind a reserve winding, also known as a tail. First embodiment In Fig. 4 the filament 7 is in the groove 17 of the bar 16 and a fresh package is about to be wound. The filament 7 extends around the empty mandrel 3 and thence on towards the fully wound package that is still rotating due to inertia. Pressure from a source 22 pushes the piston 24, and therewith the bar 16, to the right to cause the yarn to pass through the catching and cutting zone and thence onto the receiving tube 4, Fig. 5. This is the aforesaid first displacement stage. As shown in Fig. 5 the piston 24 is now at its extreme right hand setting and in this setting a port 27 in the piston is in alignment with a further pressure source 29. The pressure source 29 causes a piston 31, inside the piston 24, to move the bar 16 even further to the right, Fig. 6 (not shown) at a speed higher than the first stage movement to wind a transfer tail on the receiving tube 4. If, when the piston 31 has completed its working stroke to the right, the mandrel 3 is displaced in direction B, Fig. 3, back to the starting position shown in Fig. 2, a longer tail will be formed on the tube. Second embodiment In Fig. 8 the bar 16 is again coupled to a piston 35. As the piston 35 moves to the right, the notch 17 in the bar 16 causes the filament 7 to move across the yarn catching and cutting zone 19 onto the receiving tube 4. This is the aforesaid first displacement stage. An inclined blade 36 moves with the bar 16 towards a fixed filament guide plate 38. As the inclined blade 36 passes the filament guide plate 38 it causes the filament 7 to first ride up the almost vertical side of the plate 38 whilst the notch 17 and blade 36 continue to move to the right. The filament 7 eventually snaps over the top of plate 38 and this constitutes the aforesaid second stage of movement of the filament that is at a higher speed than the first one.