11 important principles of plastic extrusion 01Mechanical Principle 02Heat principle 03Deceleration principle 04Feed acts as coolant 05In the feeding area, it sticks to the barrel and slides onto the screw 06Materials cost the most 07Energy costs are relatively unimportant 08The pressure at the end of the screw is important 09Output = displacement of the last thread +/- pressure flow and leakage 10 Shear rate plays a major role in viscosity 11The motor and the cylinder are opposite to each other

As the manufacturing and processing technology of twin-screw extruders becomes better and better, it not only has to perform tasks such as feeding and plasticizing, but also has some requirements such as dehydration and drying. In order to better meet the different needs of users, the twin-screw extruder must continuously improve its working efficiency, and also find ways to improve the quality of the products produced.

Perhaps many people have discovered that most of the extruders used in large-scale product production lines are single-screw structures, and very few are twin-screw structures. Upstream raw material suppliers, especially manufacturers of modified materials, functional masterbatches or color masterbatches, mostly use twin-screw extruders. Why is there such a difference? In this article, the editor will analyze and discuss the difference between single-screw extruders and twin-screw extruders.

Since its introduction, twin-screw extruders have been widely used in the field of plastic modification and are the core equipment in the field of modification. Every modification factory takes good care of the twin-screw extruder, but in daily work, it is inevitable to encounter equipment loss and repair. So in order to avoid or reduce loss, how to repair it after a failure, the editor will introduce to you some tips on extruder maintenance and repair.

In the ever-evolving plastics industry, the technological innovation of twin-screw extruders has always led the industry's progress. Today, let us explore the latest innovations of twin-screw extruders.

As the workhorse in the field of compounding, the twin-screw extruder's superior performance and customizability are its advantageous features in this position. It can combine different additives and fillers to achieve different particle shapes and properties with different properties. While a variety of additives and fillers can be processed for extrusion, some methods of obtaining these products can also lead to contamination problems and low flow or low pressure in many areas throughout the barrel.

For a twin-screw extruder, the screw is mainly divided into a feeding section, a melting section, a mixing section, an exhaust section and a homogenizing section. Threaded components mainly include conveying, melting, shearing, material mixing, residence time control and other functions. The threaded elements of the twin-screw extruder are combined in a "building block" manner. In practice, they can be adjusted according to different production needs. Therefore, screw combination is the key to customizing the twin-screw extrusion process.

The specific structure of plastic twin-screw extruders is based on the actual twin-screw extruders, and specially designed twin-screw extruders can be divided into meshing types and non-meshing types according to the relative positions of the two screws. Plastic twin-screw extruders can arrange and combine thread elements and barrel elements of various geometric shapes. Based on experience-theory-practice-test, the design can be optimized for different mixing requirements to adapt to the needs of different process formulas, making the co-rotating twin-screw extruder highly adaptable.

Double-stage extruder （SP Series） and twin-screw extruder (TSE Series) are the main product series of Kairong Group & Haisi Extrusion. There are big differences between these two models.

Special color masterbatch has significant advantages such as high concentration, good dispersion and cleanliness during product processing.