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The Rounding Process of Enameled Wire
xinyuenamelled
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1 Beiträge
29.07.2018, 11:03 zitieren  
After drawing the felt, there is a rounding process. Because theEnameled Copper Wire is painted through the felt, the shape of the liquid is olive-shaped. At this time, under the effect of surface tension, the paint overcomes the viscosity of the paint and turns into a circle in an instant.

If the specification of the wire is smaller, the viscosity of the paint is smaller, and the time required for rounding is less; if the specification of the wire is increased, the viscosity of the paint is also increased, and the time required for rounding is also large. In high-viscosity paints, sometimes the surface tension cannot overcome the internal frictional force of the paint, resulting in uneven paint.

When the lacquer wire comes out of the felt, there is also a gravitational effect during the lacquering process. If the rounding time is very short, the olive-shaped sharp corners will soon disappear, the gravitational effect will have a short time, and the conductor coating layer will be even. If the rounding time is longer, the sharp corners at both ends will have a longer time and the gravitational action time will be longer. At this time, the lacquer layer at the sharp corners will have a tendency of downward turbulence, which will increase the thickness of the paint layer in the local area. Tension forces the lacquer into a spherical shape and becomes a particle. Due to the gravitational effect, it is very prominent when the paint layer is thick, so it cannot be painted too thick for each coat. This is one of the reasons why the paint wire is coated with a thin paint.

If there is a very fine burr on the wire, under the effect of surface tension, the burr is not easy to paint, but also easy to lose thinning, resulting in the pinhole of the enameled wire. If the round Enameled Wire itself becomes elliptical, under the effect of additional pressure during painting, the paint liquid layer is thin at the two ends of the long axis of the ellipse, and is thick at the two ends of the short axis, forming a significant non-uniform phenomenon, so the enameled wire is used the roundness of the round copper wire should meet the requirements.

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