| 摘要 |
PURPOSE:To regulate simply and optionally the cooling zone of a screw without the needs for reworking by drawing the screw by providing a refrigerant interruption piece movable to the axial direction of the screw in the hole through which refrigerant in the screw can pass. CONSTITUTION:A seal block 19 and a refrigerant supply pipe 20 are inserted into the hole 14 of a screw 12, and a groove 21 is formed on the periphery of the block 19. A ringed seal 23 is attached to the groove 21, and the seal block 19 is supported through a sealant 23 on the inner wall 22 of the screw and inserted into the hole 14 movably to the axial direction 13 of the screw 12. |
