The main working parts are two hollow rollers or drilling rollers that rotate in opposite directions. The one installed on the operator's side is called the front roller, which can be moved back and forth horizontally by manual or electric action, so as to adjust the roller distance and adapt to the operation requirements; The rear roller is fixed and cannot move back and forth. The size of the two rollers is generally the same, and they rotate relative to each other at different speeds. The raw rubber or rubber material is drawn into the gap between the two rollers with the rotation of the rollers, and is subjected to strong shearing to achieve the purpose of plasticizing or mixing. Open mills are also used in sectors such as plastics processing.
The open mill is the abbreviation of the open type plastic mill. In the plastic product factory, people are used to calling it a two-roll machine. The open mill is a kind of plastic mixing equipment that has been used earlier in plastic products production plants. In the calender production line, the function of the open mill before the calender and after the mixer is to knead and plasticize the evenly mixed raw materials, so as to provide a more uniform molten material for the calender to calender the plastic products. When producing cable material, the open mill can directly smelt and plasticize the powdered material mixed according to the formula into a molten material, and then press and mold it into a sheet-like belt, so that the pelletizer can cut it into granules. In the production line of floor leather, it can directly provide the bottom coating with mixing and plasticizing for the cloth leather. The recycled waste plastic films (sheets) can also be re-plasticized on the open mill.
The open mill is simple in structure, easy to manufacture, easy to operate, and easy to maintain and disassemble. Therefore, it is widely used in plastic products enterprises. The disadvantage is that the workers consume a lot of physical strength. In a high temperature environment, it is necessary to manually mix and turn the mixed material, and the number of times the plastic sheet is manually turned and mixed has a great impact on the quality of the raw material mixing.
