SJ-75/33 single screw extruder

　　SJ-75/33 single screw extruderAs a common extruder equipment used in the plastic processing industry, what are the principles and structures? Below is an analysis of the principle of SJ-75/33 single screw extruder from the conveying section, compression section, and metering section of the extruder.

Generally, the effective length is divided into three sections, determined by the diameter, pitch, and depth of the screw, with each section accounting for one-third.

Efficient dual stage integrated design is adopted to enhance plasticizing function, ensuring high-speed, high-performance and stable extrusion. The special barrier comprehensive mixing design ensures the mixing effect of materials, and the high shear and low melting plasticizing temperature ensures high-performance, low-temperature and low-pressure metering extrusion of materials. Design concept and characteristics: High speed and high-yield extrusion based on high flatness.

　　principle

The thread behind the material mouth is called the conveying section where the material is required not to be plasticized, but to be preheated and compressed. In the past, the old extrusion theory believed that the material here was loose, but later it was proven that the material here was actually a solid plug, which means that the material here is a solid plug like structure after being compressed. Therefore, as long as the conveying task is completed, its function is fulfilled.

Principle: When the second stage is called the compression stage, the volume of the screw groove gradually decreases from large to small, and the temperature needs to reach the degree of material plasticization. Compression occurs here through the conveying stage three, where it is compressed to one, which is called the compression ratio of the screw -3:1. Some machines also have changes, and the material that has completed plasticization enters the third stage.

Zhangjiagang Huade Machinery PE Plastic Pipe Main Machine PE50-250

Principle: The third paragraph is the measurement section where the material maintains its plasticizing temperature, just like a metering pump that accurately and quantitatively delivers molten material to the machine head. At this time, the temperature cannot be lower than the plasticizing temperature, usually slightly higher.

It is mainly used for extruding thermoplastic materials such as soft and hard polyvinyl chloride, polyethylene, etc. It can be used in conjunction with corresponding auxiliary machines (including molding heads) to process various plastic products, such as films, pipes, plates, ribbons, etc. It can also be used for granulation.

The plastic extruder is designed with advanced technology, high quality, good plasticization, low energy consumption, and adopts involute gear transmission. It has the characteristics of low noise, smooth operation, large bearing capacity, and long service life.

Zhangjiagang Huade Machinery PE Plastic Pipe Main Machine PE50-250

Zhangjiagang Huade Machinery PE Plastic Pipe Main Machine PE50-250