Patent ID: 6076954
Filing Date: 2000-06-20
Classification: B29C,B29K

Abstract:
A cast polymer integral mixing and vacuum processor system for delivering substantially void-free viscous polymer, comprising:a variable speed motor connected to a mixing screw, said mixing screw being angled downwardly with respect to horizontal;a tube surrounding the mixing screw, one end of the tube being fixedly connected relative to the motor and the other end having an output nozzle; andthe mixing screw having a thread thereon and which in a loading thread pitch zone has a relatively wide thread pitch for receiving dry material filler at a filler input and resin at a resin input, a first mixing and sealing thread pitch zone which has a relatively narrow thread pitch and which provides a vacuum seal and mixing of the resin with the filler material, a void removal thread pitch zone having a relatively wide thread pitch and at which a vacuum tower is located in which a vacuum is maintained to remove voids formed by gas in mixed material, and finally a second mixing and sealing thread pitch zone adjacent the nozzle having a relatively narrow thread pitch for providing a vacuum seal and for further mixing of catalyst introduced adjacent one end of the second mixing and sealing thread pitch zone.