Product Description:
Structural Design
Screw Assembly: Composed of different numbers of screw elements with various functions, installed on a shaft with guide keys or a hexagonal core shaft in a certain order and requirements. By selecting different quantities and types of screw elements and their combinations, it can adapt to different materials and process requirements.
Barrel Structure: The main barrel is generally a segmented structure, with each segment's temperature independently controllable. Commonly, materials such as nitrided steel and bimetallic are used for their wear and corrosion resistance, to extend the service life.
Drive System: Includes a motor, reducer, couplings, etc., providing power to the screws, enabling the two screws to rotate synchronously, in the same direction, or in opposite directions. Common drive methods include gear drive and chain drive.
Feeding System: Usually composed of screw-type metering feeders, etc., it can uniformly and stably convey materials into the barrel of the twin-screw extruder. Some are equipped with side feeders for adding special additives or materials.
Exhaust System: Exhaust ports are set at appropriate positions in the barrel and can be connected to vacuum pumps and other equipment to remove volatile components and moisture generated during the extrusion process, improving product quality.
Working Principle
Material Conveyance: Under the rotation of the screws, materials enter the barrel from the feeding port and are pushed forward along the barrel by the screw elements.
Melt Plasticization: As the materials move forward, they are gradually heated, softened, and melted under the combined action of the screws' shearing, extrusion, and barrel heating, transforming from solid to liquid.
Mixing and Dispersion: Different functional screw elements, such as kneading discs and toothed discs, perform intense shearing, stirring, and mixing on the molten materials, ensuring uniform dispersion of various components in the materials and achieving good mixing results.
Exhaust and Volatiles Removal: When the materials reach the exhaust section, due to the lower pressure at the exhaust ports, volatile components and moisture in the materials escape under the pressure difference, achieving the purpose of exhaust and volatiles removal.
Extrusion and Shaping: After plasticization, mixing, and exhaust, the materials are pushed out from the die by the screws. Through different die molds, they can be shaped into various products, such as pipes, sheets, films, profiles, etc.
Performance Characteristics
High Flexibility: Due to the modular design, the combination of screws and barrels can be quickly adjusted and replaced according to different materials and process requirements, achieving multiple functions and applications, and meeting the production needs of different products.
Excellent Mixing Performance: It can efficiently shear, stir, and mix materials, ensuring uniform dispersion of various components in the materials and maintaining the stability and consistency of product quality.
Good Self-Cleaning Performance: The closely meshed twin screws have a self-cleaning function during rotation, effectively preventing material accumulation and residue on the screw and barrel inner walls, reducing cleaning frequency, and improving production efficiency.
High Production Efficiency: The two screws of the twin-screw extruder work simultaneously, offering greater material conveying capacity and higher production efficiency compared to single-screw extruders, meeting the demands of large-scale production.
Low Specific Energy Consumption: Under the same production capacity, the modular twin-screw extruder has relatively lower energy consumption, achieving better energy-saving effects and reducing production costs.
Application Fields
Polymer Processing: Used in the modification, blending, filling, and reinforcement of plastics, rubber, and other polymer materials, such as the production of various high-performance engineering plastics, thermoplastic elastomers, and plastic alloys.
Food Processing: Can be used in food extrusion, shaping, and granulation processes, such as the production of breakfast cereals, snack foods, and pet foods.
Chemical Products: In the chemical industry, it can be used for the granulation, mixing, and dispersion of various chemical raw materials, additives, pigments, and coatings. Automotive industry: High-performance plastic materials required for the production of automotive interior and exterior parts, engine components, etc., such as instrument panels, seats, bumpers, etc.
Building decoration: Can produce plastic products such as pipes, profiles, and plates for the construction industry, such as PVC pipes, PE water supply pipes, wood-plastic composite materials, etc.
Your message must be between 20-3,000 characters!
