The open mill is a double-roller machine, which uses the shear force generated by the two rollers that move relative to each other at different speeds to plasticize. During the operation, it is necessary to continuously perform operations such as triangular wrapping or curling of the rubber.
The internal mixer uses the regular contraction of the space generated by the relative movement of the internal designed paddles to generate shearing force, without manual operation, saving labor.
The open mill has a simple structure and low cost, but it is labor-intensive, polluted, and physically harmful to workers.
Internal mixers are more expensive, but can be heated, and pressurized mixers can be used to handle materials that are difficult to plasticize. Low labor intensity and strong adaptability.
