| 摘要 |
<p>Provided is a die-casting machine that can accurately detect the sliding resistance of an injection plunger in an injection sleeve with high precision and from which can be obtained high quality casting products. Also provided is a method for detecting die-casting machine abnormalities. The die-casting machine is provided with a cylindrical injection sleeve (18) supplied with molten metal and an injection plunger tip (15a) attached to an injection plunger (15) that moves back and forth in the injection sleeve (18). The die-casting machine uses at least an electrically driven servo motor (9) in a drive source for an injection step where the molten metal is injected and fills a cavity of a closed metal mold by the forward motion of the injection plunger (15). A torque detection means (32) that detects the torque of the electrically driven servo motor (9) that moves the injection plunger (15) forward and an abnormality detection means (33) that determines that an abnormality has occurred in the forward operation of the injection plunger (15) when a measured value detected by the torque detection means (32) is a value that exceeds a preset threshold value are provided.</p> |
