DEVICE FOR DISCHARGING GAS IN CYLINDER OF CONTINUOUSLY OPERATING VACUUM TYPE INJECTOR THROUGH UPPER AND LOWER SLIDE AND TWO SPACE GAS DISCHARGING

摘要

A device for discharging gas in a cylinder of a continuously operating vacuum type injector through upper and lower slides and two spaces for discharging gas is provided to remove air and moisture included in raw material fed into the cylinder firstly and to discharge unnecessary gas generated molding a product secondly. A device for discharging gas in a cylinder of a continuously operating vacuum type injector through upper and lower slides and two spaces for discharging gas includes a material supply unit, a screw(180), a movable cylinder(60), a pushing space(110), first and second slide opening and closing units, a dry standby box(), a flange, a high pressure hose, and a check valve. The material supply unit has a nozzle, and a hopper. The screw heats and agitates material. Being installed at the back of screw, the movable cylinder moves back and forth. The pushing space cuts off material and air and prevents material from being jammed when a valve moves. The first and second slide opening and closing units has front and rear rods moved by the cylinder. The dry standby box has an outlet discharging air in materials to feed material between the slide opening and closing units. The flange unit has an inner pipe which is a path for material and an outer pipe which is a discharge outlet. The flange unit is fixed to an inlet of the cylinder. The high pressure hose is connected with the outlet of discharge air in the first slide opening and closing unit and in the dry standby box. The check valve connects the dry standby box with the flange.