| 摘要 |
1,192,636. Slab-casting machines; moulds. E. Q. SYLVESTER. 27 June, 1967, No. 29542/67. Heading B3F. To form a mould, e.g. for casting a slab 79 of steel, two cast steel or C.I. mould-slabs 10 are swung, each by a vertical shaft 22 to which its hinge-lugs 20 are keyed, to the positions shown in which they are spaced by bars 34, 36 which form the short sides of the mould; then, after casting, the slabs 10 are swung by their shafts 22, driven by sprocket and chain 23, through 180 degrees to combine with a second pair of bars 34, 36 to form a fresh mould. In this way, thermal stressing of the slabs 10 is reversed. The mould parts 10, 34, 36 are supported slidably on a graphite or C.I. bed 6, but, for moving between the two mould positions, the slabs 10 are each raised by raising both a lowermost hinge-lug 20 and a section 28 of a circular track 8 on which runs a roller 26 associated with edge-brackets 14 of the slab. There are edge-brackets 12 also at the hinge edges of the mould slabs 10, and when the slabs are in position, one set of a number of holes 16 in these brackets of one slab are vertically aligned with a corresponding set of those of the other slab and power-operated wedges 30 are inserted to clamp the mould parts together. A set of wedges 30 adjacent the track 8 coact similarly with a set of aligned holes 18 in the brackets 14. The holes 16, 18 visible in Fig. 1 are in use when the slabs are swung to the mould position to the left in the Figure. Between pours, the bar portions 34, 36 of the moulds are rotated through 180 degrees about their vertical axes by handles 46, 50 to reverse inner and outer surfaces. The outer bars 36 can be moved nearer the opposing bars 34 (to adjust the casting width) by a shaft 58 moving a ram 52 in a head 54. Compression rods 59 for the bars 36 are moved by a power device 62. The metal rises into the mould through a lined gate (64, 68) of which part is in the bed 6 and which is closable by a cut-off plate 72 with an opening 74 and slidable by a cylinder 76 in a groove 70 in the bed. The inner surfaces of the mould can be sprayed with a wash or have ceramic liners 80 attached by clips and the spraying can be done when the particular surfaces are idle, on the outside of a mould assembly. Toggle clamps 86 remove the cast slab 79 when the mould-slabs 10 are swung away. |
