| 摘要 |
<p>A mixer for mixing rubber or plastics compounds. The mixer has a casing (5), and two contra-rotating rotors supported in the casing with their axes of rotation parellel. Each rotor supports two nogs (6,7) of generally helical formation, one nog (6) comprising a single formation and the other (7) comprising two axially spaced formations between which the single formation nog of the other rotor is received as the rotors turn. To improve mixer throughput and efficiency, the radial distance between the radially outer surface of each nog of one rotor and the adjacent surface of the other rotor is substantially greater than the radial distance between the radially outer surface of each rotor nog and the inner surface of the casing, there is an axial gap between the trailing end of the single formation nog of each rotor and the adjacent axial end of the casing, whereby material being mixed can pass through the gap, the minimum gap between the trailing end of any one rotor nog and the leading end of another nog towards which it moves as the rotors turn is substantially greater than the gap between the radially outer surface of the nogs and the casing, and the sides of the nogs adjacent the chamber ends are streamlined to assist the flow of material across their surfaces.</p> |
