| 摘要 |
PURPOSE:To eliminate the need for correcting a traveling speed at every change of an extrusion die and owing to the progressed wear of the die by detecting the speed of a traveling puller tuned to an Al shape material and operating a run-out table (ROT) in tune with the detected speed. CONSTITUTION:A pulse detector 37 for puller speed which is used to detect the traveling speed of a puller body 35 and contacts with a guide rail 36 is successively provided to the body 35 and the detection signal thereof is inputted via an F/V converter 38 and an amplifier 39 to a motor 34 of a variable speed type with an external input for speed control. The motor 34 drives a sprocket 32B and runs the ROT30 and therefore the ROT30 can be operated at the traveling speed in thorough tune with the speed of the puller body 35, i.e., the extruding speed of the Al shape material. The need for the correction of the traveling speed of the ROT30 at every change of the extrusion die 7 and the above-mentioned need owing to the progressed wear of the die 7 are eliminated by the above-mentioned method and the lessening of the manpower for operating the extruder is made possible.
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