Co-rotating Three Screw Extruder

Co-rotating Three Screw Extruder 

Product Overview

This device is a high-performance mixing system designed for the high-end polymer processing field. As an upgraded solution for traditional twin screw extruders, the three screw extruder is designed specifically for processes that require excellent dispersion and mixing effects, higher output, and precise temperature control. This plastic extruder is widely used in the production of high filling masterbatch, engineering plastic modification, and plastic granulation processes that require strict mixing effects.

Core Features
·Three screw geometric structure: Three screws are arranged in a triangular shape, significantly increasing the material exchange interface and achieving excellent distribution and dispersion mixing in the plastic blending process.
·High torque transmission system: Equipped with a high torque gearbox optimized specifically for three screw extruders, it can withstand higher packing additions and effectively reduce the risk of material thermal degradation.
·Building block screw design: The screw components are modularly combined, and the shear strength is flexible and adjustable. Whether it is thermosensitive polymers or high viscosity engineering plastics, precise plastic extrusion processes can be achieved.
·Enhanced self-cleaning: The three screw fully engaged area provides 100% self-cleaning effect, eliminating material residue and ensuring stable plastic granulation process and efficient color and material changes.

Technical parameters

Noted: Details depend on your requirements and need.

Equipment advantages

Why choose a three screw extruder instead of traditional twin screw equipment? The three screw extruder achieves a higher specific output per unit energy consumption by evenly distributing the mechanical load to three screws. For enterprises focused on high filling plastic granulation (such as over 80% calcium carbonate or carbon black masterbatch), this plastic extruder can significantly reduce the number of production passes. It minimizes the thermal history damage of polymers to the greatest extent possible, while improving the activation effect of additives, resulting in excellent glossiness, dispersibility, and mechanical properties of the final particles.

Application Fields
·High filling masterbatch: produced from calcium carbonate, talc powder, titanium dioxide, and carbon black masterbatch, with a filling amount of over 85%.
·Engineering plastic modification: Glass fiber reinforcement, carbon fiber reinforcement, and alloying of materials such as PA6, PA66, PET, PBT, PC/ABS.
·Reactive extrusion: a reaction process that requires precise control of residence time, such as polymerization, grafting, and chain extension.
·Special blends: plastic extrusion molding of conductive plastics, halogen-free flame retardant materials, and biodegradable plastics (PLA, PBAT).
·One step extrusion: The powder is directly fed and granulated, eliminating the need for pre mixing process.

Customized services (OEM/ODM)

Nanjing Kolongwell Chemical Machinery Co., Ltd. is well aware that each mixing production line has unique requirements. We provide comprehensive OEM and ODM services to tailor your exclusive solution.
·Customization of barrel length: Optimize the aspect ratio based on the characteristics of the formula.
·Material selection: For high wear or corrosive materials, high-speed steel, powder metallurgy, or corrosion-resistant alloys can be used as the material for the barrel liner and screw.
·Feeding system: integrated volumetric or weight loss feeders, fiberglass side feeders, liquid injection systems, etc.
·Downstream granulation support: According to the output of the three screw extruder, flexible configuration of air-cooled rod granulation, underwater granulation or water ring granulation systems.

Frequently Asked Questions (FAQ)
Q1: What are the main differences between a three screw extruder and a traditional twin screw extruder?
A: The core difference lies in the mixing mechanism. The twin screw extruder relies on two screws, while our co rotating three screw extruder uses three screws arranged in a triangular shape, forming a unique "center kneading" effect and doubling the mixing interface. In the production of high filling plastic pellets and masterbatch, the three screw extruder often achieves the dispersion effect that twin screw equipment requires multiple mixing operations to achieve in one pass.

Q2: Can the three screw extruder be used for the production of fiberglass reinforced engineering plastics?
A: Absolutely possible. When configuring a plastic extrusion production line, we usually use a side feeding process, where glass fibers are added to a three screw extruder through a side feeding machine after the polymer is completely melted. This method can minimize glass fiber breakage and preserve longer fiber lengths, thereby improving the mechanical properties of the final engineering plastic product.

Q3: Compared to twin screw extruders, is the maintenance cost of a three screw extruder higher?
A: It will not significantly increase. Although there is an additional screw, the unit energy consumption and output of the three screw extruder are higher. When achieving the same annual output, smaller models of equipment can be selected, and the operating speed is lower. In addition, the screw components and barrels designed by Nanjing Kelongwell Chemical Machinery Co., Ltd. have good wear resistance and adopt a structure that is easy to disassemble and assemble, making daily maintenance convenient and efficient.

Q4: What plastic granulation systems can this device be paired with?
A: We can configure different types of plastic granulation systems for plastic extruder production lines based on material characteristics. Conventional modified materials can be selected as stretch rod granulation; For high-yield or viscous materials, it is recommended to use an underwater granulation system; Water ring granulation system can be used for engineering plastic modification. We will provide the optimal solution based on your specific production volume and material characteristics.

Q5: How does Nanjing Kelongwell ensure the quality of its three screw extruder?
A: Nanjing Kelongwell Chemical Machinery Co., Ltd. starts from the source of materials and precision machining, and uses CNC machining centers for screw components to ensure pitch accuracy. Before leaving the factory, each three screw extruder will undergo strict Factory Acceptance Testing (FAT) using your typical materials to verify production output, energy consumption, and particle quality, ensuring that your plastic granulation production line can be put into continuous and stable production immediately upon arrival at the factory.