When operating a twin-screw pelletizer, special attention must be given to the main machine to ensure stable performance. Key precautions include maintaining proper current levels, monitoring pressure sensors, and checking lubrication oil pressure. Shutdown operations fall into two categories: normal shutdown and emergency shutdown. Normal shutdown involves gradually stopping feeding, reducing screw speed, and turning off auxiliary equipment. In case of an emergency, the operator should press the emergency stop button and cut off power immediately before troubleshooting the issue.

This article describes three extruder cleaning methods: 1.Resin Cleaning: Uses polyester or epoxy resin to clean new or used equipment, removing residual materials to prevent extrusion issues like reduced speed or color differences. 2.Disassembly and Cleaning: Involves adding washing material, stopping feeding, and disassembling the extruder to remove residual material and clean the screw and die head. 3.Fire Baking: A blowtorch is used to burn off plastic from the screw, leveraging the screw's heat to clean effectively.

Classification of twin screw extruder

Process parameters affecting internal mixer mixing 1. Mixing procedure and order of adding materials 2. Mixing temperature 3. Mixing time 4. Rotor speed

Compared with strand pelletizing, underwater pelletizing has the advantages of better pellet quality, higher degree of automation and lower cost. However, compared with less sensitive commodity resins such as polyethylene, polypropylene or polystyrene, the risk of mold freezing is greater when producing engineering resins such as those mentioned in the previous paragraph.

Corrosive, abrasive, and high-temperature resins can inadvertently degrade screws and barrels. Certain engineered materials, thermoplastic elastomers, and newly developed biopolymers often create corrosive conditions that rapidly degrade equipment. Reinforcement materials such as glass fibers, balls, and other fillers and additives are abrasive and can also cause damage to equipment, especially feed screws and barrels.

High temperature melt pump is an indispensable equipment for conveying, pressurizing and metering high temperature and high viscosity polymer melt. Compared with other types of pumps, high temperature melt pump has compact structure, reliable operation, low energy consumption, high volumetric efficiency, small shearing effect on melt, stable flow rate under high viscosity and high pressure, and no outlet pressure fluctuation. The unique advantages of this pump and its key role in the process make it play an irreplaceable role in polyester production.

In the PVC (polyvinyl chloride) processing technology, mixing technology plays a vital role as the first process in the production of PVC products. However, many companies often do not pay enough attention to the mixing process, which leads to misunderstandings among workers about mixing technology, thinking that it is enough to just mix the materials evenly. This article will introduce the role, principle and process of PVC mixing in detail to help readers fully understand PVC mixing technology.

Whether the venting screw leaks material is directly related to the extrusion process, plastic properties, and the design of the screw and vent. Therefore, when manufacturers use venting extruders for production and processing, they must have a detailed understanding of the processing technology, resin characteristics, and equipment performance to ensure that the venting extruder can operate normally and stably.

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.