WATER SEAL STRUCTURE OF CONTINUOUS CASTING MOLD

摘要

PROBLEM TO BE SOLVED: To provide a water seal structure of a continuous casting mold capable of securing thermal elongation amount of a copper plate to a backplate by a space smaller than that of an existing water seal mechanism. SOLUTION: The water seal structure of the continuous casting mold has the copper plate 12 and the backplate 15 abutting on the rear surface of the copper plate 12 and the backplate 15 which is fixed by screwing a bolt 13 mounted in a bolt through-hole 14 into the copper plate 12. A water seal structure 10 pressed to a small diameter recess 21 formed at the annular bottom of the large diameter recess 20 of the backplate 15 through which the bolt 13 is passed is arranged between a bolt head 19 and the bolt through-hole 14. An inner seal washer 18 mounted in the small diameter recess 21 and an outer seal washer 17 abutting on the inner seal washer 18 and movably arranged in the large diameter recess 20 are used in the water seal structure 10. The gap between the inner circumferential surface of the inner seal washer 18 and the outer circumferential surface of the non-screw part of the bolt 13 is made to be equal to or smaller than the gap between the outer circumferential surface of the non-screw part of the bolt 13 and the inner circumferential surface of the bolt through-hole 14. COPYRIGHT: (C)2011,JPO&INPIT