Patent ID: 6036467
Filing Date: 2000-03-14
Classification: B05B,B29C,D01D,F02M,F23D

Abstract:
An apparatus for extruding a pressurized molten thermoplastic polymer, the apparatus comprising:a die housing defining a chamber, an inlet orifice and an extrusion orifice;said inlet orifice being connectable to an external source of the pressurized molten thermoplastic polymer and being in communication with said chamber to supply the pressurized molten thermoplastic polymer thereto;said chamber adapted to receive said pressurized molten thermoplastic polymer from said inlet orifice and being in communication with said extrusion orifice to define a direct polymer flow path therebetween;said extrusion orifice defined by the walls of a die tip, the extrusion orifice being adapted to receive the pressurized molten thermoplastic polymer from the chamber and pass the polymer out of the die housing; anda means for applying ultrasonic energy to a location within the polymer flow path as the pressurized molten thermoplastic polymer moves therealong without applying ultrasonic energy directly to the die tip, wherein the means for applying ultrasonic energy is located within the chamber and is free from direct vibrational communication with the die tip.