| 摘要 |
<p>[Object] To provide a sealing device which is free of such a situation that a damaged portion of a back ring caused by a parting line at a surface of a slide ring is communicated with a damaged portion of the back ring caused by a through-cut of the slide ring to thereby form a leakage channel. [Solving means] A sealing device (1) having: a slide ring (2) made of a resin; and a back ring (3) made of an elastic body; the sealing device (1) being configured to seal an annular gap between a housing having a shaft hole, and a shaft inserted through the shaft hole; wherein the slide ring (2) has: a through-cut (22), comprising a circumferential cut (22A), and axial cuts (22B) extending from both ends of the circumferential cut, along the axial direction; and multiple parting lines (23A, 23B) formed on a surface of the slide ring (2), where the parting lines (23A, 23B) have been formed by injection molding the slide ring by a mold dividable into multiple partial molds at multiple junction of molds on the mold, and by subsequently parting the mold at the junction of molds; and wherein the parting lines (23A, 23B) are arranged so that the parting lines (23A, 23B) are not overlapped with the circumferential cut (22A) exposed at the junction surface of the slide ring (2) with the back ring (3), throughout the lengthwise direction of the circumferential cut.</p> |
