| 摘要 |
PURPOSE:To promote atomization and to prevent tailing by sufficiently agitating a liq. feed by a shoulder-shaped stepped part immediately before the feed is injected from a lipped orifice-type spout formed by the crossing of a domed recessed face and a V-shaped groove. CONSTITUTION:The lipped orifice-type spout 7 formed by the crossing of the domed recessed face 2 and the V-shaped groove 6 is provided. A cylindrical passage 3 having a sufficiently larger cross-sectional area than the rear end of the recessed face 2 and having the element oval or elliptical front end is furnished on the upstream side of the domed recessed face 2. When the recessed face 2 is connected to the cylindrical passage 3, the passage is smoothly connected to the recessed face 2 at the minor-axis part on the front end of the cylindrical passage 3, and the shoulder-shaped stepped part 5 is formed at the major-axis part. Moreover, the V-shaped groove 6 crossing the recessed face 2 is provided while the groove is matched with the minor-axis direction of the cylindrical passage 3 to the extent that the sharp valley is placed in the vicinity of the stepped part 5 and not crossed with the stepped part. As a result, atomization is promoted, and tailing can be prevented.
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