The Conical Twin-Screw Barrel is a high-performance barrel specifically designed for plastic extrusion production lines, particularly for PVC and other plastic materials. It is widely used in the production of PVC pipes, PVC profiles, PVC sheets, PVC pelletizing, NFC (natural fiber composite materials), WPC (PVC, PE wood-plastic composite materials), and PVC foam boards. By utilizing advanced manufacturing processes and high-quality materials, this barrel delivers excellent performance, meeting the demands of modern extrusion equipment for high efficiency, stability, and durability. It is especially suitable for processing PVC and its composites, heat-sensitive materials, and recycled materials, providing excellent plastification, wear resistance, and corrosion resistance.
Technical Features:
- High-Quality Materials and Advanced Technology:
The core of the conical twin-screw barrel is made from high-strength alloy steels such as 38CrMoAlA, which offers exceptional wear resistance, corrosion resistance, and excellent heat treatment properties. Additionally, through nitriding and bimetallic spray coating, the barrel surface hardness can reach HV 850-1000, and the nitriding layer depth is between 0.5mm-0.8mm, significantly enhancing wear resistance and extending the service life. - Conical Twin-Screw Design:
Featuring an optimized conical twin-screw design, the barrel provides excellent material plastification and shear capabilities. At lower speeds, the barrel ensures uniform and stable plastification while reducing the risk of thermal degradation, making it especially suitable for processing heat-sensitive materials. This design helps improve production efficiency, reduce energy consumption, and enhance product quality uniformity. - Wide Applicability:
This series of barrels is suitable for a wide range of extrusion lines, covering PVC pipes, PVC profiles, PVC sheets, PVC foam boards, PVC pelletizing, WPC (PVC, PE wood-plastic composite materials), and more. It is especially ideal for processes requiring high-quality plastification and stability, and it can process various raw materials (including virgin and recycled materials). - High Precision and Stability:
The barrel is precision-machined with an inner wall straightness tolerance of 0.015mm/m, ensuring uniform material flow and efficient plastification. Furthermore, the barrel undergoes strict testing to ensure stable operation under high-load conditions, avoiding production interruptions or failures. - Nitriding and Bimetallic Spray Coating Technology:
The conical twin-screw barrel undergoes nitriding treatment and bimetallic spray coating to improve the surface hardness and corrosion resistance. The nitriding hardness reaches HV850-1000, and the nitriding layer depth is adjustable between 0.5 mm and 0.8 mm, ensuring the barrel can withstand long-term high-load operating conditions.
Technical Specifications:
- Base Material: High-strength alloy steels such as 38CrMoAlA, 42CrMo,9Cr18Mo, and 304 stainless steel, providing excellent mechanical properties and corrosion resistance.
- Hardness:
- Normal Hardness: HB 240°-280°
- Nitriding Hardness: HV 850-1000
- Nitriding Layer Depth: 0.5mm-0.8mm
- Chromium Plating Thickness: 0.05mm-0.10mm
- Specifications: Available in various specifications, including SJZ 35/80, SJZ 45/100, SJZ 51/105, SJZ 55/110, SJZ 65/132, SJZ 80/156, SJZ 92/188, SJZ 110/220, to meet the needs of different extrusion lines.
- Applicable Materials: Suitable for processing both virgin and recycled materials, with the ability to add 5%-300% calcium carbonate.
Applications:
- PVC Pipe Extrusion:
The conical twin-screw barrel is widely used in PVC pipe production lines, ensuring high quality and efficient production. It is particularly suitable for water supply, drainage, and construction pipe production, such as PVC eco-friendly water pipes, UPVC drainage pipes, CPVC hot water pipes, UPVC square rainwater pipes, PVC double-wall corrugated pipes, PVC electrical cable sheathing pipes, and PVC industrial ducting. - PVC Profile Extrusion:
Ideal for producing various PVC profiles, such as PVC door and window profiles, PVC decorative profiles, PVC door panels and frames, etc. The barrel ensures excellent plastification, maintaining dimensional accuracy and surface quality of the profiles. - PVC Sheet Extrusion:
Capable of efficiently and stably processing PVC rigid sheets, PVC soft sheets, and PVC transparent sheets, widely used in packaging, decorative materials, and other industries, ensuring uniformity and stability throughout the production process. - WPC (Wood-Plastic Composite) Extrusion:
Especially suitable for producing PVC and PE wood-plastic composite materials (WPC), providing excellent plastification and stability, and adapting to different wood-plastic composite materials. - PVC Foam Board Extrusion:
Suitable for producing PVC foam boards, ensuring even and stable foam structure, and meeting the demands for lightweight and heat insulation materials. - PVC Pelletizing Production:
Used for producing PVC rigid pellets, PVC soft pellets, PVC transparent pellets, PVC medical pellets, PVC low-smoke halogen-free materials, PVC cable compounds, and more. Ensures consistency and excellent flow properties of the pellets, meeting the needs of downstream processing. - Composite Material Extrusion:
Suitable for processing PVC composite materials, enhancing their physical properties, and meeting the demanding requirements of industrial and construction applications.
Conclusion:
The Conical Twin-Screw Barrel series has become an indispensable component in modern plastic extrusion production due to its exceptional performance and wide applicability. By utilizing high-strength alloy steels and advanced nitriding and bimetallic spray coating technologies, it ensures long-term stable operation under high-load and prolonged production conditions. Whether in the production of PVC pipes, profiles, sheets, PVC pelletizing, NFC (natural fiber composites), WPC (PVC, PE wood-plastic composites), PVC foam boards, or other products, this barrel offers superior plastification, wear resistance, and corrosion resistance, ensuring an efficient and stable production process.
