EXTRUDER WITH BUILT-IN SPINNERET PLATE AND METHOD OF DEGASSING MIXTURES OF POLYMERS Russian patent published in 2020 - IPC B29C48/00 

FIELD: machine building.

SUBSTANCE: invention relates to extruder (10), in particular for extruding a product from synthetic rubber, which contains a cylinder of extruder (24), one or more extrusion elements (12, 14), in particular, one or more extruder screws and/or mixing elements (14) located inside this cylinder of extruder (24) for product movement, additionally, there is inlet for supply of washing agent into cylinder of extruder (24) and outlet hole for removal of volatile compounds from product and, if necessary, washing agent. According to the invention, the perforated spinneret plate (26) is fixed in extruder (24) cylinder before the outlet hole. Since spinneret plate (26) is not attached to extruder elements (12, 14), but to extruder barrel (24), preventing circular gap between spinneret plate (26) and cylinder of extruder (24) in such a way that there is no extruded material passing radially outside spinneret plate (26). Part of extruded material with low ratio of surface area to volume is eliminated so as to facilitate removal of volatile compounds.

EFFECT: proposed are extruder with built-in spinneret and method of degassing mixes of polymers.

15 cl, 20 dwg