Twin screw extruder has the characteristics of single screw extruder, as well as the advantages of convenient feeding, stable extrusion, and easy exhaust, etc. It is suitable for the production and processing of various extruded products.
With the increasingly sophisticated manufacturing process of twin screw extruder, not only plasticizing, but also dehydration and drying are required. So, what are the characteristics of twin-screw extruders? How to improve efficiency! Let's take a look together!
Twin screw extruder has the basic principle of single screw extruder: solid conveying, melt pressurization, pumping, steam extraction and evaporation, but not limited to this. The theoretical research of twin screw extrusion started relatively late, with chaotic screw shapes and extrusion processes, which brought a lot of difficulties to the research.
Generally speaking, the theoretical research of twin screw extruder is still in the development stage, where technology is greater than science. The entire extrusion process consists of three parts: the physical change law of polymer in the extrusion process, the basic principle of conveying, solid and melt conveying, exhaust phase and law, the establishment of mathematical and physical models, and the guidance of the planning of twin screw extruders.
When the screw speed is the same, increasing the depth of the screw groove can greatly increase the conveying capacity. On the other hand, the level of plasticizing and mixing of the screw must be correspondingly increased, which requires the screw to withstand a larger torque. When the screw speed is high, the residence time of the material in the extruder is reduced, which may lead to insufficient plasticization and mixing. Therefore, the length of the screw must be appropriately increased, which will inevitably lead to an increase in the actual load torque and power of the twin screw extruder.
Increasing the free volume of the helix groove is also a key factor. The screw must have a large free volume in the feeding and dehumidifying sections. For loose and dense materials, increasing the free volume of the material section and the filling degree of the material in the screw groove can greatly improve the processing capacity of the extruder.
The larger the torque distance, the higher the design precision, manufacturing precision, material strength, and heat treatment requirements of the transmission box gear, output shaft, bearings, etc. The design precision of the screw core shaft, screw components, and kneading disc will also be higher.
Nanjing KY Chemical Machinery Co., Ltd. not only provides customers with first-class quality extruders, but also helps customers optimize the entire production system. From material storage, drying, transportation, metering, mixing, and mixing to final product packaging, we equip the factory-level intelligent control system to provide customers with a complete set of high reliability and high cost-effective solutions. Welcome to consult.
Tel: +86-25-52706155
E-mail: info@kymach.com
No.59 West Tianyuan Road, Jiangning, Nanjing, Jiangsu Province, China
English 
日本語 
한국어 
français 
Español 
русский 
português 
العربية 
中文
