| 摘要 |
PROBLEM TO BE SOLVED: To restrain flaw developed on long side copper plates and short side copper plates according as variation of a cast slab width during continuous casting performed by moving the short sides of a mold. SOLUTION: In the width changeable mold 1 provided with the mutually faced one pair of long side copper plates 3 and one pair of short side copper plates 6 interposed with the long side copper plates and changeable to the long side copper plates, the thickness of the contacting surface between the sliding surfaces 10 of the short side copper plates and the long side copper plates, is made to 10-25 mm. As the other way, recessed grooves extended in the casting direction at the center parts of the sliding surfaces are set so that the thickness of the contacting surface between the sliding surfaces of the short side copper plates and the long side copper plates, becomes each 3-25 mm at both sides of the recessed grooves 11.
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