| 摘要 |
PURPOSE:To improve the quality of a product by forming a nozzle for spraying a spraying agent radially in the radial direction of an injection sleeve by sliding in said sleeve in the longitudinal direction thereof in such a manner that the amt. of the spraying agent to be sprayed by said nozzle can be varied according to nozzle positions. CONSTITUTION:A piston rod 31 of a cylinder 30 is advanced to move a driving cylinder 32 to the position concentrical with an injection sleeve 19 and thereafter pumps 36, 45 are started; at the same time a controller 50 commands a stop valve to open and solenoids 43, 44 to repeat energization and de-energization alternately at prescribed timings. A pressure oil is thereby alternately fed to the head end side and rod end side of the driving cylinder 32 so that a nozzle device 39 repeats rise and fall and injects a spraying liquid 41 from the nozzle 40, thereby coating the liquid 41 to the inside surface of the sleeve 19. |
