Mechaninis plastiko ekstruderio pagalbinės įrangos principas

Vieno varžto ekstruderio principas
Vienkartinis varžtas paprastai yra padalintas į tris efektyvaus ilgio dalis .. Efektyvus trijų sekcijų ilgis nustatomas pagal varžto skersmenį, žingsnį ir gylį ir paprastai yra padalintas į trečdalį kiekvieno .
The last thread of the material port is called the conveying section: the material here is required not to be plasticized, but to be preheated and pressed. In the past, the old extrusion theory believed that the material here was a loose body. Later, it was proved that the movement of the material here is similar to a solid piston. Therefore, as long as the conveying task is completed, it is jo funkcija .
The second section is called the compression section. At this time, the volume of the screw groove gradually decreases from large to small, and the temperature must reach the℃of plasticization of the material. The compression generated here is from the conveying section three to one here. This is called the compression ratio of the screw - 3:1. Some Mašinos taip pat turi pakeitimų . Plastifikuota medžiaga patenka į trečiąjį skyrių .
The third section is the metering section. The material here maintains the plasticizing temperature. It just accurately and quantitatively transports the melt material like a metering pump to supply the machine head. At this time, the temperature cannot be lower than the plasticizing temperature, and is generally slightly higher.