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What are the characteristics of the barrel structure for twin-screw extruders?

Update:28 Sep 2018
Summary:

The structure of the twin-screw extruder barrel and the […]

The structure of the twin-screw extruder barrel and the single-screw extruder screw barrel are basically similar. From the outline structure, the twin-screw barrel is also divided into an integral barrel and a segmented barrel.
The overall barrel is currently used more. For example, the barrel for the counter-rotating twin-screw extruder and the conical twin-screw extruder is mostly an integral barrel structure. Huahong Answer
Segmented combination barrels are used in large twin-screw extruders. This segmented combination barrel is used to facilitate the machining of the barrel and to save some of the more expensive alloy steel. In the intermeshing co-rotating twin-screw extruder, the structural composition of the barrel is mostly segmented, and the barrel is composed of several segments of equal length, and some of the barrel segments are opened with a feed port, and some of the barrels are opened. Outlet or additive port.