| 摘要 |
PROBLEM TO BE SOLVED: To adequately eliminate spatter by increasing the capacity of an accumulator, improving the closability of an opening/closing valve, and optimizing the start timing of air blasting.SOLUTION: A small diameter part 8 and a large diameter part 9 are formed in a guide pin 6. An air blow gap 11 is formed surrounding the small diameter part 8. A stationary seating surface 19 is formed on the inner end surface of a large diameter hole 12, and a movable seating surface 20 is formed on an end surface of the large diameter part 9. An accumulator 30 is configured between an inner surface 28 of an enlarged-diameter part and the external surface 29 of the large diameter part 9. The length in a radius direction of the movable seating surface 20 is shortened, as well as the capacity of the accumulator 30 is increased by providing a cut part 31 to a corner part of the end surface of the large diameter part 9. An air passage 24 is provided for guiding compressed air introduced to the large diameter hole 12 to the accumulator 30. |
