Patent ID: 6945687

Claim:
A mixing apparatus comprising a first screw-based machine (S 1 ) having a casing with an inner wall surrounding a screw-containing barrel which comprises a plasticizing zone and a homogenizing zone, and having heating equipment at least in the plasticizing and homogenizing zone, and a second screw-based machine (S 2 ) having a screw and a screw-containing barrel and an outlet, wherein the outlet of S 2 is connected to the screw-containing barrel of S 1 by a connector which comprises cooling equipment which is effective as far as the inner wall of S 1 , and wherein the screw of S 2 is capable of building up a pressure which is sufficiently high to allow that material is conveyed from S 2 to S 1 against pressure which is exerted within the screw-containing barrel of S 1 .