EXTRUSION PACKING FOR MOLDING THIN-WALL HONEYCOMB ARTICLE Russian patent published in 1994 - IPC

FIELD: plastic material molding. SUBSTANCE: packing has a body with an inlet face, at side of which cylindrical hole system is provided. At side of an outlet face the body has two grids of slot-type crossing ducts, forming a large number of drifts. The ducts of the second grid, provided between the ducts of the first grid, have less depth values. The ducts of the first grid. Have different width along its depth in a way, that on portion of the inlet face the ducts have depth no more, than depth values of the second grid ducts and width more, than the width of the second grid ducts. The ducts of the first grid on their portion with the larger width may have constant or variable width along their depth and transition zone the less width value till the more width value, having inclined walls. Such structure allows to enhanced quality of articles due to increased pressure at each step of molding, caused by lowered effective cross section of the packing. EFFECT: enhanced product quality. 6 cl, 3 dwg