| 摘要 |
PURPOSE:To maintain high precision for many years by a method wherein an intermediate board same as or similar to blocks in terms of thermal expansion coefficient is arranged between each block and a stool. CONSTITUTION:A runner block 6 is provided with a pot 7 and a first runner 8 and is attached to a stool 11 with a first knock pin 9 and a first screw, and is fixed by the knock pin 9 to a prescribed position on the stool 11. A drag block 12 is consisted of a drag capvity 13, a drag main body 15 wherein a gate 14 is formed, a runner insert 17 provided with a second runner 16, and an end plate 18, and is attached to the stool 11 with a second knock pin 19 and a second screw 20. An intermediate board 34, made of the same material as the runner block 6 and the drag block 12, is arranged between the runner block 6/drag block 12 and the stool 11. |
