CYLINDER-SHAPED PROCESSING DEVICE CONTAINING DEGASATION DEVICE Russian patent published in 2009 - IPC B29C47/76 

FIELD: mechanics.

SUBSTANCE: this invention refers to device for processing molten polymeric compounds and includes degasation device. The effect is achieved in molten polymeric composition processing device which includes a screw made with the possibility of being rotated inside the housing. The latter includes internal wall fitted to the screw in the part of the housing, as well as chamber with outlet connection pipe to connect the housing to reduced pressure source. At that, degasation device includes one piston provided with the possibility of back-and-forth movement inside the chamber between the first position and the second position. At that, piston includes edge surface the shape of which corresponds to the shape of internal housing wall in the fitted part. Edge surface of piston comprises the part of internal wall in the fitted part of the housing when piston is in the first position, and provides opening of hole of internal wall at the second position. At that, chamber includes the channel connecting the wall hole to outlet connection pipe when piston is in the second position. At that, chamber includes inlet connection pipe equipped with a valve for periodic gas flow passage along edge surface of piston to outlet connection pipe for controlled gas cleaning of edge surface of piston and removing any particles of molten composition from outlet connection pipe. At that, piston is in the second position.

EFFECT: providing complete prevention of blockage or residue formation near ventilation opening, and reaching the above by means of simple design.

9 cl, 6 dwg