GB1145889A - Automatic bobbin exchange mechanism for two-for-one twisting machines - Google Patents

Abstract

1,145,889. Doffing and donning. PALITEX PROJECT-CO., G.m.b.H. 22 Dec., 1966 [24 Dec., 1965], No. 57431/66. Headings D1D and D1F. Means for replacing fully wound packages 23 by empty tubes 16 and empty bobbin carriers 9 by full bobbin carriers on a two for one twisting frame comprises a magazine capable of travelling along the frame and preferably consisting of a helical chute 30 on a carriage 28 and bobbin units 61 in the magazine formed by a prepared carrier 9 with an empty tube 16 on top. Adapted to travel with the magazine e.g. by being mounted on carriage 28 are two grippers adjustable in operational height and pivoting round a vertical axis, one of which takes the carriers 9 from the spinning positions to the magazine and vice-versa, and the other of which removes full tubes from the winding spindle and replaces them by empty ones. As shown the carriage 28 is stopped in alignment with a particular spindle in response to a yarn breakage, an empty feed bobbin or a full take-up package. The mandrel holding full package 23 is rotated into a vertical position so that it can be gripped internally by an expanding mandrel 56a (see also Fig. 2 not shown). Mandrel 56a is carried by a rotary hydraulic piston 51a on a head which is vertically movable on a hydraulically operated piston rod 51. The empty bobbin carrier 9, see Figs. 3 not shown, is engaged by an electromagnetic gripper (35) mounted to be movable vertically, horizontally and about a vertical axis by hydraulic pistons, is lifted, retracted and pivoted to a position where the associated full package can be placed therein by the mandrel 56a which has been moved to the appropriate position. The magnetic gripper then places the unit 62 on the chute to proceed to the lower end thereof. The magnetic gripper then picks up a full bobbin carrier 9 with an empty tube 16 therein from the upper part of the chute and places the carrier on its spindle; meanwhile the mandrel 56a picks up the tube 16 raises it to the winding station, places it on mandrel 14a which then pivots to the winding position. A11 the operations are controlled by an arrangement of electro-magnetic valves 41 to 46 controlling the flow of fluid from a pump 37, the valves being controlled by a programme switch mechanism 47. In an alternative form (Fig. 4 not shown) the magazine is carried on one carriage and the gripper mechanisms on another; thus the magazines can quickly be replaced by newly filled ones. The magnets holding the bobbin of the twist spindle stationary may be mounted in the balloon separators.