This article provides a comprehensive guide to the rotating blades used in pelletizers, covering their material types, tooth profile classifications, lifespan analysis, and proper maintenance methods. It explains the differences between blades used for underwater strand pelletizing and dry cutting, details key parameters of blade teeth, identifies common sharpening mistakes, and offers best practices for extending blade life and maintaining cutting efficiency. Proper full-profile grinding and maintaining original blade angles are emphasized to ensure optimal pellet production and blade durability.

This article compares two essential rubber processing machines: the open mill mixer and the internal mixer. An open mill uses two exposed rollers for basic rubber mastication and mixing, offering low cost but requiring high labor and causing environmental concerns. In contrast, an internal mixer (e.g., Banbury mixer) operates in a closed system with intermeshing rotors, enabling higher efficiency, better product quality, reduced labor, and improved environmental protection. Though more expensive, internal mixers are increasingly favored for their automation potential and mixing performance. With advancements in technology, they are expected to gradually replace traditional open mills.

This article discusses the phenomenon of melt surging during TPE pelletizing, where molten material abnormally and excessively exits the die, causing unstable extrusion and affecting product quality. Key causes include improper temperature control, high screw speed, and unstable raw material quality. Solutions involve optimizing temperature and screw speed, maintaining equipment, ensuring raw material consistency, and following proper operating procedures.

This article outlines the differences in processes and production efficiency among various models of twin-screw extruders, classified by screw rotation direction, screw structure, intermeshing degree, purpose, and specification. It discusses the specific applications, characteristics, and production efficiencies of co-rotating and counter-rotating models, parallel and conical designs, and general-purpose versus specialized extruders. The article also highlights the factors affecting production efficiency, such as screw design, rotation speed, material properties, and process parameters, providing a comprehensive guide for selecting the right twin-screw extruder based on material, process, and production scale.

This article provides a comprehensive overview of screw maintenance for extruders. It covers key topics such as screw cleaning methods, including the use of purging compounds and HDPE as a cost-effective alternative, as well as the causes and effects of screw wear. It also explains the procedures for removing screws, the materials used in screw manufacturing, and how to select the right materials based on processing needs. Additionally, a Q&A section addresses common concerns, such as increasing production output, screw design, and wear prevention. This guide is valuable for anyone involved in plastic extrusion or recycling operations.

This article provides an overview of key factors influencing extruder screw performance, including the effects of screw length-to-diameter (L/D) ratio, screw diameter (thickness), and material selection. It also explains how shear forces generated by the screw impact material plasticization and overall extrusion efficiency. Understanding these elements is crucial for optimizing extruder design and ensuring stable, high-quality production.

This article explains the structure and function of extruder screws, which are divided into three main zones: the feeding zone, where solid resin is transported and preheated; the compression zone, where the resin melts through external heating and shear heat; and the metering zone, which ensures uniform extrusion. Additionally, the article discusses darmage(a mixing section), screw elements used in twin-screw extruders, the compression ratio affecting resin flow and pressure, and the barrel, which houses the screw and facilitates heat transfer. Proper screw design is essential for optimizing resin plasticization, mixing, and extrusion efficiency.

This article explores the structure, types, and functions of extruder screws, which are essential in resin processing. It distinguishes between single-screw and twin-screw extruders, highlighting their respective advantages in mixing and production efficiency. The document also discusses different screw designs, such as full-flight and mixing (darmage) screws, and their impact on resin blending and production output. The key takeaway is that selecting the right extruder screw depends on the specific application and desired balance between mixing efficiency and production capacity.

The article discusses essential equipment for TPE pellet production, including extruders, pelletizers, and auxiliary systems. Equipment choice depends on production scale, with larger setups requiring more advanced automation. Contract manufacturing is an alternative for companies with limited capacity.

Shear heat release occurs in extrusion as the screw's shearing action generates heat, affecting material temperature. Proper control through screw design, speed regulation, and cooling ensures process efficiency and product quality. It can also be leveraged to enhance material properties in specific applications.