Fraction

Now we talked about how fraction takes its natural shape - spherical. If you remember what was said earlier about weightlessness of the falling body and take in the calculation that at the very beginning of the fall one can neglect the negligible air resistance, then realize that the falling portions of the liquid must also take the form of balls. Indeed, falling rain drops have the shape of balls. Fraction is nothing but the frozen droplets of molten lead, which when forced from the factory is forced to fall with drops from a great height into cold water: there the shot solidifies in the form of perfectly regular balls.

Now we talked about how fraction takes its natural shape - spherical

So cast shot is called "tower", because when cast it is forced to fall from the top of a high "crusher" tower. The towers of the crusher plant are of metal construction and reach a height of 45 m; in the uppermost part there is a foundry with melting pots, at the bottom - a tank with water. The cast shot is subject to sorting and finishing. A drop of molten lead freezes into a fraction during the fall; A tank with water is needed only to soften the impact of the pellet in the fall and prevent the distortion of its spherical shape. (A shot with a diameter of more than 6 mm, so-called buckshot, is made differently: cutting out wire pieces, then rolling.)

From the water comes the shot to the drying table, and then to the rotating drum, where it is poured for a long time, to wipe small irregularities on the surface of the grains. Smoothed grains are poured on the upper edge of the system of slightly inclined planes: the right spherical pellets roll to the bottom, and the wrong ones roll off to the side sooner or later and enter the perifulation. The selective fraction is sorted through the screens and then finally polished by rotation in drums with the addition of graphite.

A good shot should be heavy, spherical, flat and firm, to avoid lead when shooting. In terms of the size of the fractions, the fraction is denoted by numbers, letters and features, the largest varieties of which are called grains, the smallest - dunst.

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