The working principle of twisting machine: the ply yarn drawn from the cylinder, through the guide rod and the transverse guide device, from the guide roller output, through the guide hook and travelling coil around the tube. When the spindle drives the tube to rotate together, the yarn pulls the traveller to rotate on the ring ring ring and twists the yarn.
Most of the boxes on the bobbin frame are looped on the insert in the form of horizontal, and the ply yarn pulls the bobbin to turn from side to back. In order to reduce the end breakage caused by excessive tension during unwinding of single yarn, a conical cylinder is used to tightly cover the insert spindle, and the single yarn is pulled out axially from the respective end of the tube to realize the coalescence in the feeding frame. The combined twisting machine can save the process of yarn drawing and is generally only suitable for double strand yarns with low spinning quality requirements. The guide roller is usually a pair of smooth rollers. Lower roller is 6 to 8 ingots one section, full-length mosaic. Each spindle of the upper roller is driven by self-weight and friction of the lower roller. The composite yarn has a certain winding method on the roller, so that the yarn and the roller have enough long friction surround arc to ensure that the roller conveys yarn to the twisting area at a uniform speed. Some of them use two lower rollers or even two pairs of rollers to adapt to the high twist tension and evenly feed yarns on special spinning thick strands or twisting machines. In the roller part, some twisting machines are equipped with self-stop device for broken ends. Some twisting machines are equipped with a water tank under the guide rod. Before twisting the ply yarn, the water is first applied, which is called wet twisting twisting machine. Wet twisted yarn has the advantages of high strength and smooth surface, but anti-rust materials are needed for rollers and guide frames.
