Patent DE-19800484-A1 (DE)
Title: Bobbin winder with two spindles for a continuous yarn feed
Inventor: PETERSEN HUGO ERHARD
IPC: B65H67/052
Filed: 1998-01-09
Abstract: The bobbin winder, with two spindles, have a linear guide (17,18) for the sliding shoes, with the sliding shoe (19,20) of each spindle in a separate linear guide. The reciprocating yarn guide (5) and the pressure roller (8) are mounted to a slide (4), which moves horizontally between several working positions. The head yarn guide (1), which carries the yarn (2) to the reciprocating guide (5), has a horizontal shift which is synchronized with the slide movements. The linear guides (17,18) are in fixed positions, in parallel and at a gap from each other or they swing against each other on separate swivel mountings (33,48). The pressure roller (8) is pressed (30) against the slide (4), to give it a radial and aligned movement to the bobbin. Sensors (27) monitor the path movements of the sliding shoes (19,20) and the swing drive (34), and are linked to a control (29). The control (29) controls the expanding movement between the pressure roller (8) and bobbin through the linear drive (23,24), with one movement path sensor (27) at the linear guide (17,18). The sensor (27) has a glass measurement rule, to be scanned by an opto-electronic unit, for the control (29) to set the applied force (30) at the pressure roller, and control the linear drives (23,24) for the sliding shoes (20,19), according to the pressure between the pressure roller (8) and the bobbin. The reciprocating yarn guide (5) is in a force or positive fit at the slide (4) for the pressure roller (8), which is linked to the pressure unit (30). Both ends of each bobbin spindle (10,11) are in separate sliding shoe frames (9). Three closure systems (7,45) are at the doffing side of the sliding shoe frames (9), to link the spindle guide (6) with the linear drive, for release from the short-stroke clamping cylinder (45), and to open the spindle guide (6) for the bobbin to be pushed away. The bobbin spindles (10,11), independently of each other, are each at a linear guide (17,18) and two separate siding shoe frames (9), where linear guide holders (49,50) and swivel mountings (33,48) give independent swing and linear guide actions according to the angular functions. A suction system is at and in the sliding shoe frames (9), directly near the reciprocating yarn guide (5), to remove dust and lint and other floating matter. The bobbin spindle is a hollow shaft as a pneumatic passage, closed at one side with the spindle motor centering and coupling plate (31).  The other side is held at the doffer centering unit and clamped to the short-stroke clamping cylinder (45) as a combination with the sliding shoe frame (9) and the bearing mounting (32) on a spindle clamped at the tip. The bobbin spindles (10,11), as a second variation, have an integrated spindle drive (22), held on both sides to move at the shoe sliding frame (9) over the hollow shaft as the center, eliminating the spindle motor (39). The pneumatic doffing adapter (40) has a short-stroke clamping cylinder (45) with a drilling (44) and cone shoulder. The opto-electronic sensors (46) at the machine frame (15) set the optimum bobbin diameter together with the control (29). The reciprocating yarn guide can, as an alternative, form an air-supported shuttle which floats on an air cushion in the center of a compressed air supply, together with a control and an air bleed system. A pulse generator moves the shuttle between pulse beating surfaces, with a sensor linked to a control to set the reciprocating movements. A pendulum is on one side of the shuttle, at a swing axis with a counterweight, and the yarn guide extends outwards through an opening and the pneumatic housing. Magnets are to left and right of the counterweight for the pendulum movement, and to give stability on each direction changeover in the yarn (2) movement. The reciprocating yarn guide system can also be a pneumatic yarn guide tube, with a compressed air guide tube to give the movement direction to the slide (4) and form an air cushion for it. The compressed air tube is held at the reciprocating holder at one side and a compressed air connection in a positive fit is at the head side at the slide (4). A setting motor gives the alternating movements for the air guide tube with the yarn guide and the yarn (2).