Patent GB-1464937-A (GB)
Title: Winding machine
IPC: B65H67/048
Filed: 1974-12-03
Abstract: 1464937 Continuous winding apparatus BARMAG BARMER MASCHINENFABRIK AG 3 Dec 1974 [22 Dec 1973 (2)] 52215/ 74 Heading D1J A continuous winding machine Figs. 1 and 3a comprises a traversing system 6, two contact rollers 7, 8 each adapted to be brought into frictional driving contact with the periphery of a winding tube or package; a rotatable bobbin revolver 12 on which are rotatably mounted at least two tube chucks 13, 14 which are brought alternately into frictional contact with a contact roller and into a bobbin changing or rest position, and an independent drive 9, 10 for each of the contact rollers 7, 8. The arrangement is such that whilst a package on a substantially full tube 30.1 is in contact with the first roller 7, a chuck with an empty tube 30.2 mounted on it can be brought into contact with the second roller 8. Fig. 3b shows how the bobbin revolver 12 then rotates further until the full tube 30.1 is adjacent the bobbin changing position, and the tube 30.2 that is now commencing to have a package 22 built up on it is simultaneously in driven contact with both rollers 7, 8. Fig. 3c shows how the bobbin revolver 12 then rotates through a further increment to cause the tube 30.2 to be in driven engagement with the contact roller 7 only. The contact rollers 7, 8 and the traverse mechanism 6 are mounted on a carriage 2 that is vertically displaceable to allow for the changing diameters and settings of the packages on the two chucks 13, 14. Whilst the new package 22, Fig. 3c, is being wound by frictional engagement with the drive roll 7, the bobbin revolver 12 is held against rotation by a locking mechanism 18. Whilst a new package 22 is in contact with both contact rollers 7, 8 the independent drive 10 to the roller 8 is declutched and the roller 8 is automatically coupled through a belt drive (73) Fig. 9 (not shown) to roller 7 in order that the two rollers 7, 8 shall rotate at the same speed at this time. Fig. 10 shows one of two cams 93 that may be carried by the bobbin revolver, the cam 93 co-operating with a roller 99 that is acted on by pneumatic means 94 in such a way that a peripheral force offsetting at least some of the weight of the full package 23 is applied to the bobbin revolver 12 when a full package and an empty tube are simultaneously in contact with the contact rollers 7, 8. Fig. 2 (not shown) shows a variation in which rollers (81) on the bobbin revolver 12 cooperate with pneumatically actuated cam surfaces (83) to produce the same type of peripheral force. The second roller 8 may have an endless groove for assisting in the traverse of the filament being wound. The roller 8 may have one or more larger diameter rings at its ends adapted to engage the ends of an empty tube 30.2 mounted on the chuck 13. Alternatively, the chuck 13 carries larger diameter contact rings at its ends and the second contact roller 8 extends axially into the vicinity of these two contact rings. Transferring filament from wound bobbin to empty bobbin. When the package 23, Fig. 1, is fully wound and the new empty bobbin 30.2 is in contact with the second drive roll 8, a filament guide assembly 40.1 swings from a retracted setting (shown in full lines) to an operative setting (shown in broken lines) to force the filament out of the traverse guide 4. The tension in the filament, in the absence of grooves in the roller 8, causes it to slide along the guide assembly 40.1 until it settles in a notch 44.2 in the guide assembly, this notch being in line with one end of the tube chuck 13. If there is a traverse groove 20 in the roller 8 then this traverse groove also causes the filament to move towards and into the notch 44.2. From the upper end of a guide track 50 there extends an arm 47.1 with an eye at its free end. The arm 47.1 now descends down the track 50 and as it does so the eye catches the yarn extending upwardly from the notch 44.2. At the lower setting of the arm 47.1, shown at 47.2, the yarn extends as a loop over the end of the chuck tube 13. A notch 59 on the chuck tube 13 snags the yarn to cause wind-up to commence. The yarn between the notch 59 and the arm 47.2 is cut by cutters 60 on the chuck mandrel. The guide assembly 40.1 reverts to its original retracted setting. Filament Tail. A spring biassed finger 67 holds the yarn temporarily at one end of the chuck tube 13 to allow a tail to be built.