| 摘要 |
PURPOSE:To provide a gasket for double stoke, which has long durable service life, therefore the lowering of the casting efficiency is not brought about and has the sufficient sealness and fitness, therefore the casting in the perfect inert gas atmosphere can be executed. CONSTITUTION:In this double stoke, an inner cylinder 1 arranging a flange 1a at the upper part, an outer cylinder 2 fitted to outside of the inner cylinder 1 so as to arrange an annular gap 3 and a disk body 4 boring a hole 4a interposed between the lower surface of the flange 1a in the inner cylinder and the upper surface at the upper part of the outer cylinder 2 and communicating the annular gap 3 with the outside, are provided. Then, in the gaskets 7a, 7b for double stoke, which are interposed between the lower surface of the flange 1a in the inner cylinder and the upper surface of the disk body 4 and between the upper surface at the upper part of the outer cylinder 2 and the lower surface of the disk body 4 and laminate multiple angle-shaped steel plates in the radius direction and packing materials into the laminated steel plates 10, an expandable graphite 11a is used as the packing material. |
