Lab Two-roll Open Mixer

A laboratory two-roll open mixer has two horizontally arranged rollers that rotate in opposite directions at different speeds. When material is fed into the upper area between the two rollers, it is drawn between them due to friction and adhesion between the material and the roller surfaces, as well as the bonding between the material components.

The material is then subjected to intense shearing and compression, forming sheets that wrap around one of the rollers. As the roller rotates, the material returns to the area between the two rollers.

Through repeated shearing and compression, the material softens and plasticizes, ultimately achieving a uniform mixture of components. Before mixing plastics, the rollers need to be preheated to a specific temperature.

In most cases, processing rubber materials does not require heating; instead, cooling water is used to cool the material during processing when necessary.