| 摘要 |
PURPOSE:To extend the service life of a sealing, etc., by providing an endless angular type ring on the divided face of a die and pressing the end face sealing plate having an annular packing to the contact part of the end part thereof. CONSTITUTION:The optimum crushing allowance is provided by fitting an angular type endless ring 4 and forming a groove on the divided face of a divided die 2. An outer cylinder 3 is then arranged by keeping about 10mm gap on the outer periphery of the divided die 2, the annular packing 8 having the width slightly larger than the outer width of the ring 4 and the end face sealing plate 3 is pressed by a cylinder 12. In this case, the bulging is performed by adding a water pressure by a pump 13 to the gap between the die 2 and outer cylinder 3. In this way the sealing is performed with an individual sealing medium in each sealing direction separately, so the sealing life is extended and the sealing reliability is improved as well.
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