| 摘要 |
PURPOSE:To heighten the heat insulating properties of a subchamber as well as to prevent oxidation and deformation in a metal from occurring, by filling up a ceramics fiber material in a heat insulating part forming position between a ceramics inner cylinder and a sintered metallic outer cylinder, while heating and sintering the outer cylinder. CONSTITUTION:A ceramics fiber material is filled up in a heat insulating part forming position 3 between a ceramics inner cylinder 1l and an outer cylinder 2l premolded by a ferrous sintering material. Afterward, the outer cylinder 2 is heated and sintered. With contraction at the time of sintering the outer cylinder 2, the whole body containing the ceramics fiber material inside is rigidly unified in one. Thus, the heat insulating properties of a subchamber is well heightened and, what is more, oxidization and deformation in a metal are preventable. |
