The manufacturer of Screw and Barrel for Extruder will show you: the structure of the barrel

The manufacturer of Screw and Barrel for Extruder tells you that the barrel is an important part of the extruder just like the screw in the extrusion compression molding system. The barrel and the screw work together, the barrel contains the screw, and the screw rotates in the barrel. The manufacturer of Screw and Barrel for Extruder tells you that when the screw rotates and pushes the plastic to move forward in the barrel, the outside of the barrel heats and transfers heat to the plastic in the barrel. In addition, the volume of the screw on the screw gradually decreases, so that the The plastic is uniformly mixed and plasticized after being subjected to various forces such as squeezing, turning, and shearing. As it moves to the front of the barrel, it gradually melts into a viscous fluid state, completing the plasticization of the plastic. The manufacturer of Screw and Barrel for Extruder tells you that the normal cooperation between the barrel and the screw guarantees the continuous extrusion and molding production of the extruder.

The structure of common barrels includes integral type, segmented type, bushing and bimetal layer type.
1. Integral structure barrel: The manufacturer of Screw and Barrel for Extruder tells you that the integral structure barrel is widely used in the extruder, especially when the extruder size is small, the integral barrel is generally used. This kind of barrel is more convenient for the arrangement of heating and cooling devices, the temperature control is easy to ensure, and the machining accuracy of the barrel is higher.
2. Segmented structure barrel: The segmented structure barrel is mainly used in larger extruders and vented extruders. The manufacturer of Screw and Barrel for Extruder tells you that because the barrel is composed of several sections, the length of each section of the barrel is small, which brings convenience to machining; however, the inner diameter and concentricity accuracy of several barrels are more difficult To achieve uniformity; in addition, the segmented barrels are connected by flanges, which brings certain difficulties to the arrangement of the heating and cooling devices of the barrels, and the temperature control of heating and cooling will not be too uniform.
3. The inner diameter of the barrel is lined or cast wear-resistant alloy: The Screw and Barrel for Extruder manufacturer tells you that in order to save precious alloy steel, the barrel of the larger extruder is usually formed by cast steel, and then after finishing the inner hole Add wear-resistant alloy bushing or cast a layer of wear-resistant alloy material.
The application of bushing barrel or casting a layer of wear-resistant alloy barrel in large extruders not only saves a lot of precious alloy steel, reduces equipment manufacturing costs, but also creates convenient conditions for future barrel maintenance. : The manufacturer of Screw and Barrel for Extruder tells you that when the alloy bushing of the barrel is severely worn, just replace the bushing to make the barrel work normally, saving equipment maintenance time.