| 摘要 |
PURPOSE:To move a die quickly and correctly to the center position of the head upper face by connecting an die moving truck to the die and the piston rod of the hydraulic mobile cylinder and by arranging each hydraulic positioning cylinder to the head side of the cylinder and truck side. CONSTITUTION:Said truck 32 is linked to dies 31A, 31B and the piston rod 341 of the hydraulic mobile cylinder 33 fixed to a head 20. The hydraulic positioning subcylindr 36 with smaller stroke than the piston 34 stroke having larger output than the pulling force thereof is co-axially fixed to the cylinder 33 and its piston rod 37 is made coming into contact with the piston 34 head side by penetrating the head of the cylinder 33. A hydraulic type positioning cylinder 50 is fixed to the head 20 and taken to be of larger output than the pressing force of the cylinder 33 with smaller stroke compared thereto, and a piston rod 511 end part is made freely abuttable to the truck 32. The dies 31A, 31B are correctly moved to the center position on the head 20 upper face by moving the cylinder 33 to the right, left direction with the changeover of a switching valve 44 by advancing the pistons 37, 51 of the cylinders 36, 50 upto the advance limit.
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