GB1403918A - Method and apparatus for packaging linear material - Google Patents

Abstract

1403918 Filament winding apparatus and method OWENS-CORNING FIBERGLAS CORP 7 Dec 1972 [8 Dec 1971] 56538/72 Heading DIJ A filament winder having guides 88, Fig. 4, that traverse the filaments onto a winding spindle to form packages 72, 74 is characterized by means 40, Fig. 2, for supplying the filaments to the winder at constant speed, means for reducing the angular velocity of the winder so that the rate of collection is constant with changing package size, means sensing the angular velocity of the winder as an indication of package size, and means responsive to said sensing means to move the guides 88 away from the yarn winding spindle during build up of the package so as to provide a predetermined space relationship between the guides 88 and the packages 72, 74. Motor Drive. A motor 104, Fig. 2, drives an eddy-current clutch 106. As the flux is reduced the energy transmitted to the clutch diminishes and this causes the package takeup speed to reduce. Fig. 5 shows a circuit for controlling the flux in the clutch 106. A controller 140, having a patterned rate of change, supplies a control signal to the clutch 106. The controller 140 receives a voltage signal from a transducer 142 that responds to yarn tension, and this signal changes the output of the controller 140 to bring the speed of collection of the strand into conformity with the actual rate of strand feed. For improved stability the controller 140 receives feedback signals from a tachometer 146 measuring the speed of the winding spindle. Traverse Assembly. The traverse mechanism 90 is mounted on a carriage 130 that can move horizontally on support rods 192 and 194. Fig. 6 shows a circuit for displacing the carriage 130 to keep a predetermined spaced relationship between the packages 72 and 74 and the traverse mechanism 90. A battery 200 is connected across a potentiometer 202. The positive output voltage of the potentiometer 202 travels to a summing junction J3. A rectifier 208 rectifies the output of the tachometer 146 and provides a negative voltage to the junction J3. When the voltages supplied to the junction J3 are unbalanced the junction J3, through a switch 198, energizes a grounded solenoid coil 216 to close a switch 218. Closure of switch 218 causes a motor 220 to be energized from a source L3, L4. The motor 220 drives the slider of potentiometer 202 and actuates a drive system that moves the carriage 130 until the voltage from the potentiometer again equals the rectified voltage from the tachometer 146 at which point the solenoid coil 216 is not energized, the switch 218 opens and the motor 220 stops. Ribbon winding preventing. As shown in Fig. 4 the filament guides 88 are traversed by cam followers 100 sliding in the grooves 98 of barrel cams 96. The barrel cams 96 are rotatably mounted in a tubular housing 90 and to prevent ribbon winding additional means are provided to reciprocate the housing 90. Fig. 2 illustrates a wheel cam 286 that is driven by the means rotating the barrel cams 96, the wheel cam 286 serving to reciprocate the housing 90.