GASOSTATIC EXTRUDER Russian patent published in 2012 - IPC B22F3/15 

FIELD: process engineering.

SUBSTANCE: invention relates to industrial equipment for machining large-size parts from solid and discrete materials at up to 500 MPa and 2000°C created in gasostic extruder working chamber medium. Proposed device comprises bearing bed and container with plugs to make its working chamber communicated via gas pipeline with gas system shutoff normally-closed valves with increased stop needle lift above the seat and gas release cylinder with stepped rod. Said cylinder houses the spring to allow permanent pressing of cylinder rod to servo rod. Every valve comprises piston, gas cylinder of unloading, needle with through inner channel communicating gas cylinder with under-valve chamber. Set of disc springs is arranged above valve piston. Needle cylindrical surface central zone has cylindrical groove with diameter smaller than outer diameter. Needle bottom end, above shutoff cone, has solid cylindrical bead while needle top end is provided with cylindrical washer with diameter exceeding that of the needle. Said cylindrical surface central zone may be provided with boring to fit semi-rings therein.

EFFECT: higher tightness, simplified design.

2 cl, 5 dwg