EXTRUSION HEAD FOR MULTILAYER TUBULAR PREFORMS OF COMBINATIONS OF UNSTABLE MATERIALS.

摘要

A POLYMER RESIN EXTRUSION HEAD IS PROVIDED FOR MOLDING MULTILAYER TUBULAR ITEMS WITH NOT EQUAL VISCOSITY RESINS WHERE SUCH RESINS ARE NOT COMBINED IN A MULTILAYER STRUCTURE UP TO A POINT NEAR THE OUTLET OF THE CAUSA CAES OF THE CAUSTAE OF THE CABEZA DE LOS CABEZA DE LOS CABEZA DE LOS CABEZA DE LOS CABEZES DE LA CABEZA IN SOME POSITIONS, THE INNER LAYER OF THE MULTILAYER STRUCTURE IS ADDED THE LAST ONE TO HELP MINIMIZE UNSTABLE FLOWS. IN PREFERRED PLACES IN PRACTICE, UNSTABLE FLOWS ARE MINIMIZED BY COMBINATION OF ALL THE COMPONENTS OF THE MULTILAYER STRUCTURE WITHIN 4 '' '' OF THE EXIT OF THE EXTRUSION HEAD.