FIELD: chemical industry; food industry; thermoplastic polymeric materials molding by extrusion.
SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to thermoplastic polymeric materials molding by extrusion, mainly to an extrusion of polyethylene and may be used at production of pipes, structural sections, a film. The device contains a nozzle, which base is made out of one material, and on an inner surface of its cavity in the place, which adjoins its outlet, there is a coating or a fixed insert made out of another material, that is elastic as contrasted to a melt of the polymeric material. The length of the coating or the insert is no less than 1/10 of a gap width for the melt squeezing out. The invention ensures an increase of the flawless extrusion rate of melts of the polymers subject to crushing.
EFFECT: the invention ensures an increase of the flawless extrusion rate of melts of the polymers subject to crushing.
2 cl, 15 dwg
