The invention discloses a method for
spinning color segment bamboo joint color yarns. In the spun
yarn process, four rovings with at least one color are simultaneously fed into a huge drafting
spinning frame which is of a four-roller, four-leather-collar and three-
area type. In the four rovings, two of the four rovings are fed in from rear rollers through double-horn openings, one roving is fed in from a middle-rear roller through a
yarn guiding groove, and one roving is fed in from a middle-front roller through a
yarn guiding groove. According to the method, the four-roving feeding scheme is adopted, the segment
color effect with four different colors at most can be achieved, and the production of segment color yarns of different styles is achieved. In the part of the spun yarn process, the four-roller, four-leather-collar and three-
area type is used so that huge drafting of 30-300 times can be achieved, a foundation is laid for simultaneous feeding of the four rovings, and
spinning efficiency is improved. Meanwhile, the rear rollers, the middle-rear roller and the middle-front roller in the four rollers are controlled respectively through an independent
servo motor, the draft multiple in the three-area drafting can be adjusted at will, so that the segment color bamboo joint effect of various styles is achieved, and the spinning adaptability and the spinning quality of segment color yarns are improved.