Attempts
have been previously made to produce sheets directly from molten metal
by pouring the metal: (1) between two revolving rollers; or (2)
between a revolving wheel and the surface of an inclosing fixed
semicircular segment. By these means none but very thin plates could
be satisfactorily produced. In this invention by C.M. Pielsticker,
London, the machinery consists of a large receiving roller of 5 ft.
diameter more or less, and of a length equal to that of the plate to
be produced. With this are combined small forming rollers arranged in
succession part way round the periphery of the large roller, and
revolving at the same rate as the large roller. The rollers can be
cooled by a current of water circulating through them. The molten
metal flows on to the surface of the large roller and is prevented
from escaping sideways by flanges with which the large roller is
provided. These flanges embrace the small rollers and are of a depth
greater than that of the thickest plate which it is proposed to roll.
The distance between the large roller and the small rollers can be
adjusted according to the desired thickness of the plate. When dealing
with metals of high melting point, such as steel, the first small
roller is made of refractory material and is heated from inside by the
flame of a blow pipe.
Pages:
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95