| 摘要 |
PURPOSE:To shorten switching time of reciprocating motion of a cylinder, and enhance durability by moving a manifold arranged between air supply-discharge pipe means and air feed-supply pipe means coaxially opposed to each other, and supplying and discharging air altenately to the head side and the cap side of an extruding cylinder. CONSTITUTION:A manifold 43 is arranged between the end parts of air supply-discharge pipe means on the head side and the cap side of an extruding cylinder 21 and the end parts of two air feed-supply pipe means of an air supply source 56. Supply holes 45 are passed penetratingly in a straight line through the upper and lower surfaces of the manifold 43, and exhaust holes 46 are arranged on arrangement lines L by passing penetratingly in a bending shape to the side surface from the upper surface, and such supply holes 45 and exhaust holes 46 are arranged so that the supply holes 45 are situated between the end part of a head side air supply pipe means and the end part of one air feed-supply means, and that the exhaust holes 46 are situated between the end part of a cap side air supply-discharge means and the end part of the other air feed-supply pipe means. Thereby, a mechanism is simplified, and durability is improved. |
