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.

When the material moves forward along the screw, it experiences changes in temperature, pressure, viscosity, etc. This change is not the same throughout the entire length of the screw. According to the changing characteristics of the material, the screw can be divided into a feeding section, a compression section and a homoge0nization section.

The screw of the parallel twin screw extruder in the same direction is designed based on the principle of integration, and can be replaced and combined according to different material needs. When disassembling the screw, the material inside the main machine should be drained as much as possible (if the material is high viscosity plastic such as PC or medium viscosity plastic such as ABS and POM, PP or PE material can be added to clean the chamber before parking). Then, the main machine and various auxiliary machines should be stopped, and each section of the electric heater can still maintain normal operation. Then, the screw should be replaced according to the following steps.

The screw and barrel are key components of plastic extruders and have an important impact on the performance and production efficiency of the extruder. Therefore, the selection of appropriate materials and manufacturing processes is critical to the performance of screws and barrels.

How to select screw parameters for different raw materials? (1) PC (Polycarbonate) (2) PMMA (Organic Glass) (3) PA (Nylon) (4) PET (polyethylene terephthalate) (5) PVC (polyvinyl chloride).

This article introduces the basic principles of twin screw extrusion of plastics, including Mechanical principles，Thermal principle，Deceleration principle，The feed acts as a coolant，In the feed zone, sticks to the barrel & slides onto the screw，Materials cost the most，Energy costs are relatively unimportant，The pressure at the end of the screw is very important，Output = displacement of last thread +/- pressure flow and leakage，Shear rate plays a major role in viscosity， and The motor is opposed to the barrel these aspects.

1. Different product requirements, different screw combinations 2. How to increase production capacity 3. Product shrinkage hole problem 4. Screw cooling

Five factors affecting the service life of the barrel and screw elements

The screw elements and kneading blocks are designed ,

Special Design Integrated Parallel Twin Screw Extruder