| 摘要 |
A method and apparatus are disclosed for forming a resin-impregnated fiber web that is particularly suitable for use in reinforced plastic composites and printed circuit board applications. The method includes the steps of drawing machine direction yarns from multiple spools contained in creels arranged around a hollow cylinder; passing machine direction yarns from the creels through a circular reed; pulling machine direction yarns the length of the hollow cylinder's outer surface in a longitudinal direction; controlling the application of an uncured or partially cured thermoset or thermoplastic resin to the yarns as they travel the length of the hollow cylinder; winding cross-direction yarns around the periphery of the hollow cylinder (i.e., on top of the machine direction yarns) thereby forming a web; heating and cooling the resulting web; and finally collecting the web on a roll. In its apparatus aspects, the invention includes a hollow cylinder, a creel surrounding the hollow cylinder for supporting machine direction yam, a resin heater and pump for heating and pumping the resin to a resin manifold for applying resin to the yarns, a controller for controlling the speed of the machine direction yarns and the amount of resin applied to the yarns, a rotating disk supported by a support ring and powered by electromagnetic actuators, a yarn supply containing cross-direction yarns supported by the rotating disk, circular heaters for partially curing the resin saturated yarns located around the periphery of the cylinder, and a slitter for cutting the resin-impregnated fiber web into separate sections. |
