The function and requirement of the main parts of the mill

The function, requirement, material, structure and classification of the open mill: The roller is the main part of the open mill. In the process of work, it is directly in contact with the compound, the compound produced extrusion and shear. Requirements: 1. Must have a certain mechanical strength, stiffness, can withstand the rubber force; 2. The working surface of the roller must have high wear resistance and corrosion resistance, and surface hardness not less than Shaw 65; 3. Structurally, it has a reasonable geometry to prevent excessive stress concentration; 4. Good thermal conductivity, convenient for heating and cooling; 5. Simple manufacturing process, low cost; 6. The diameter error is 1 ~ 0.5 mm, the Surface roughness is 3.2 ~ 1.6, the factory inspection must ensure that the roller diameter has a positive deviation. Open mill material: generally choose cold hard cast iron, surface layer of the organization hard, wear-resistant, the hardness of the white layer is not lower than Shaw 65 structure: Roller mainly by the diameter of d part of the work (called Roller) ; diameter of the supporting part of D1, a drive part called the diameter of the roll and the diameter of the D3. Classification: 1 its classification method mainly according to the surface shape of the roller. Generally divided into: A. Cylindrical Roller (cylindrical surface) B. Drum drum rolls are used for reclaim refining, C. The roller with groove break, wash rubber, 2 according to Heating Cooling Form: Hollow Type, drill hole type 3 according to heating medium: Electric Heating, steam heating, oil heating, constant temperature water 4 according to whether the roller diameter is the same or not: same diameter, different diameter