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Three aspects affecting the performance of co-rotating parallel twin-screw extruder (1)

Date:2019-12-14

In recent years, with the continuous development of polymer modified materials, their requirements for mixing equipment have become higher and higher. Co-rotating parallel twin-screw extruder is a kind of equipment that is widely used in continuous mixers. As a matter of course, it has attracted wide attention from everyone, and the more research has been conducted around it. At present, according to the development trend at home and abroad, the co-directional parallel twin screw extruder is mainly developed in terms of high speed, high torque, large extrusion volume and low energy consumption. Split-type parallel twin-screw extruder is a high-speed high-torque extruder that can quickly open the barrel for material cleaning.
The salient feature of the same-direction parallel twin-screw extruder is that the barrel can be split at the same time, and the screw and barrel liner can be combined at will.

1. Split barrel. The barrel of the conventional co-rotating twin-screw extruder is integral and cannot be opened. The split parallel twin-screw extruder is a split type. It consists of two upper and lower halves. The lower half is fixed on the frame. The upper half is connected to the lower half through a worm reducer. . The upper and lower barrels are usually bolted with two rows of bolts. When the barrel needs to be opened, simply loosen the bolts and turn the handle of the worm gear box to open the barrel.

2. Building block screw and barrel. The screw and barrel of the main body of the split-type parallel twin-screw extruder adopt advanced "block type" design. The screw is composed of various types of screw blocks set on the mandrel. The sleeve can be adjusted according to the different screw blocks, so that the ideal thread element structure can be flexibly combined according to the process requirements of the material type, etc. This process can better solve the contradiction between the so-called universality and specificity of the screw, which is generally difficult to take into account, and achieve the purpose of one machine with multiple functions and one machine with multiple functions. Another advantage of the "block type" design is that the worn screw and barrel components can be replaced locally, which avoids the scrap of the entire screw or barrel and greatly reduces maintenance costs.

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