EXTRUSION HEAD Russian patent published in 2024 - IPC B29C48/25 B29C48/16 

FIELD: various technological processes.

SUBSTANCE: invention relates to devices for production of multilayer articles of flat and other shapes by method of coextrusion. Invention relates to an extrusion head, comprising a housing made detachable, consisting of sections, in the centre between two sections there is a recess for liquid circulation, wherein sections form two forming channels interconnected with feed channels, forming channels are made with complex-profile section, liquid circulation recess is made of triangular cross-section, placed in a divider having the shape of a triangular prism, the outer faces of which are flat, and the vertex is located in the outlet window area, changing into the larger rectangular cross-section cavity, distances between longitudinal ribs and longitudinal streams are the same, cross-sections of parallel longitudinal streams made on the surface of the outer upper flat face of the divider and parallel longitudinal ribs made on the surface of the outer lower flat face of the divider are trapezoidal and have two sections of equal length, wherein at first section their height and depth increase linearly from feed channels to outlet window while at second section it remains constant.

EFFECT: creation of an extrusion head allowing to produce two-layer articles having a strong connection of layers.

1 cl, 2 dwg