| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection sleeve of a die casting machine, wherein a solidified piece is not entrained into a molten metal by constraining the turburence of the molten metal in the injection sleeve accompanying the advancing action of a plunger tip. SOLUTION: A mold 1 is composed of a stationary mold 2 well known as before and a movable mold 3, and on the stationary mold 2 and the movable mold 3, a cavity 4 for forming a die-casting product is formed. From the side end of the cavity 4, a runner 9 is formed, and on the end thereof, the injection sleeve 5 is fixed, Into the injection sleeve 5, the plunger tip 6 is inserted so as to be movable forth and back by a hydraulic cylinder not shown in the figure. On the end part of the injection sleeve 5, stepped parts 7, 7a, 7b whose diameters are larger than that of the plunger tip 6 are formed.
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