The coordination requirements of the screw and the barrel involve the reasonable configuration of the clearance to ensure the performance and efficiency of the plastic processing equipment.
The clearance between screw and barrel is an important parameter in plastic processing equipment, which directly affects the performance of equipment, the plasticizing effect of plastics and the quality of products. The configuration of the clearance needs to consider a variety of factors, including the type of plastic, screw diameter, use and so on. Generally speaking, the gap value is between 0.002 and 0.005DS, and the design should refer to the relevant data and adjust according to the actual situation. The configuration of the clearance should take into account the functional requirements of different sections of the screw, such as the requirements for the clearance in the homogenization section should be more stringent, and can be appropriately relaxed in other sections. The possibility of screw and barrel wear and screw power consumption can be reduced under the premise of not affecting the actual effect by adopting the method of segmental matching, that is, the gradually reduced gap of the charging section, the compression section and the homogenizing section are matched with the barrel.
