Internal rubber mixer

摘要

Object: To attain 1 &cir& an enhancement of productivity and of micro-dispersibility of compounding agent and 2 &cir& an enhancement of macro-dispersibility of compounding agent and a low temperature mixing of rubber. Construction: In order to maintain a shearing action and an agitating action to rubber at a high level, it is appropriate to select a helix angle of a long wing 2 in a range of not less than 30 DEG and less than 50 DEG , and in an internal rubber mixer according to the present invention, a helix angle of the long wing is set in this range. Further, an axial directional length Ls of a short wing 3 is made larger than that delta of a cut-off portion of the long wing 2, thereby a rubber flow f-1 is prevented from passing straight through a rotor space portion. <IMAGE>