| 摘要 |
<p>PURPOSE:To provide the control method of a pipe making device capable of preventing the generation of defective products and the trouble of the pipe making device. CONSTITUTION:In a pipe making device 1, in which the periphery of a mandrel 12 is surrounded by a plurality of mold blocks 11 connected in a belt shape and a resin material 4 is extruded in a cavity space 3 formed among the molding blocks 11 and the mandrel 12 while the mold blocks 11 are forwarded and circulated successively and a pipe body 2 is molded, the mold calmping force of the mold blocks 11 changing with the fluctuation of the supply pressure of the resin material 4 is detected with the elapsed time. The circulation velocity of the mold blocks 11 is controlled on the basis of the detected pressure, and clearances among the mold blocks 11 changing with the fluctuation of the supply pressure of the resin material 4 are detected with the lapse of time and the circulation velocity of the mold blocks 11 is controlled on the basis of the detected clearances.</p> |
