Advances in twin screw extruders offer opportunities for processing that is shear sensitive or limited by torque and/or temperature. Regardless of the formulation and/or end product, it is important for processors to understand and employ the latest technology to achieve success.

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.

List of PS modified formulas 1. PS blending 2. Flame retardant reinforced toughened PS/PBT blended alloy material 3. PS flame retardant 4. Halogen-free flame retardant modified HIPS 5. PS foaming 6. Low foaming HIPS plastic paper

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.

The structure of a twin-screw extruder is very similar to that of a single-screw extruder, but its working principle is very different. In a single-screw extruder, material transportation relies on the friction and viscous resistance of the material, so the residence time distribution is wider. In contrast, the material conveying of the twin-screw extruder relies on the positive displacement of the screw, so the residence time distribution is narrower. The raw materials of the twin-screw extruder are fed through the feed port by a metering feeder. Some additives (such as glass fiber) need to be added through the feed port in the middle of the barrel and transported to the die head by the screw. During this process, the movement of the material varies depending on the screw meshing method and the direction of rotation. This article will introduce the specific differences in their working principles from this perspective.

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.

The most notable feature of the co-rotating twin-screw extruder is that both the screw and barrel adopt a "building block" design. By combining various threaded elements, the co-rotating twin-screw extruder has the functions of feeding, melting, mixing, exhausting, pressure holding and conveying, realizing various process such as material conveying, plasticizing, shearing, exhausting, pressure holding and extrusion.

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.

Application Classification and Characteristics of Plastic Recycling Pelletizer Crushed material recycling and granulation production line: Film material two-stage single-screw granulation production line: Nylon waste filament and fishing net single screw recycling and pelletizing production line:

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.