INJECTION CYLINDER BODY FOR INJECTOR IN COMMON USE AS CHEMICAL CONTAINER

摘要

PURPOSE:To enable encapsulating of dry chemicals into an injection cylinder body at a low cost by forming and providing the cylindrical wall of a cylindrical part upper than an intermediate plug part with a vent bypass formed by expanding the diameter of a part of the cylindrical mold in such a manner that both top and bottom ends thereof exist on the inside surface of the cylindrical mold and that the vertical length thereof is set longer than the vertical thickness of the outer peripheral surface of the intermediate plug. CONSTITUTION:The cylindrical part 1a is formed and provided with the vent bypass 8 formed by expanding the diameter of a part of the cylindrical wall on the cylindrical wall between the intermediate plug part and the opening at the top end. The vertical length L2 of the vent bypass 8 is set longer than the vertical thickness D1 of the intermediate plug 50 consisting of a rubber material inserted into the intermediate plug part. The injection cylinder 1 injects the liquid chemicals into a dry chemical chamber 13 in the state of fitting a hole plug 52 into the cavity in the nozzle part 10 in the bottom at the bottom end and mounting a protective cover 53 at its bottom end. The liquid chemicals are freeze-dried by operation of a freeze-drying machine. The dry chemical chamber 13 and the opening are communicated with each other via the vent bypass 8 and the steam removed from the chemicals in the process of freeze drying is expelled outside through the vent bypass 8.