| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricant feeder for a die cast machine to reduce the number of bubbles generated in a casting. SOLUTION: A plunger tip 3 is inserted in an injection sleeve 1, and slides in the axial direction long its inner wall. A ring-shaped frame 7 is fitted to a rear end face of the injection sleeve 1, and an arc-shaped shoe-like block 5 is held by the inside of the frame 7 via a coil spring 6. The blocks 4 are formed of graphite and molybdenum disulfide with the Cu-Sn alloy powder as the binder by the sintering. Each block is arc-shaped, and arranged along an outer circumferential surface of the plunger tip 3. These blocks 5 are arranged in two rows along the axial direction of the plunger tip 3, each row comprises two blocks 5, and the angles of each row in the circumferential direction are different by 90 deg..
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