In a normal operation of enamelled wire machine, most of the operator's energy and physical strength spent in the discharge line some, interchange discharge line disk make the operator pay a large amount of labor, the joint is prone to quality problems and attack operation problems. The useful way is to lay out the wire in large capacity.
　　The key is to control the tension, when the tension is large not only thin conductor, so that the wire appearance lost light, but also affect a number of functions of enameled wire. From the appearance of the thin wire, coated enameled wire luster is poor; From the functional point of view, enameled wire elongation, resilience, flexibility, thermal shock are affected. The tension of the discharge line is too small, the line is easy to jump to form a parallel line, line impact furnace. When the most afraid of half a ring tension, half a ring tension is small, so not only make the wire loose, broken, a section of a section was pulled fine, but also can lead to the oven inner line of the big jump, the formation of line, line fault. The tension should be even and appropriate.
　　A power wheel is installed in front of the annealing furnace to greatly assist in tension control. The maximum non-elongation tension of copper wire is about 15kg/mm2 at room temperature and about 7kg/mm2 at 400℃. At 460℃, the maximum non-elongation tension is 4kg/mm2. The maximum non-elongation tension at 500℃ is 2kg/mm2. In the process of normal enameled wire coating, the tension of enameled wire should be significantly less than the non-extension tension, the demand control is at the mercy of 50%, the tension control is at the mercy of 20% of the non-extension tension.
　　Large standard and large capacity spool usually adopts radial rotating wire thrower. Intermediate standard wire usually choose the over - end type or brush type wire discharge; Fine standard wire is usually used brush type or double - cone set - out wire.
　　No matter which discharge method is chosen, there are strict requirements on the layout and quality of bare copper wire spool
　　-- the appearance should be bright to ensure that the wire is not chafed
　　-- there is an r Angle with a radius of 2 -- 4mm on both sides of the shaft core and inside and outside the side plate to ensure an equilibrium release during the discharge process
　　After the spool is machined, it must be subjected to dynamic and static balance tests
　　-- shaft diameter required for brush rewinding: side plate diameter less than 1:1.7; The discharge demand at the end is less than 1:1.9, otherwise the discharge to the shaft core will present a broken appearance.