Triple-flighted Screw Element
Product Name: Triple-flighted Screw Elements
Model：φ15 mm ~φ350mm
Applicable Brands：Most well-known extruders on the market
Material: Tool steel, HIP, stainless steel, nickel-based alloy, cobalt-based alloy, etc.
Properties:Wear-resisting, Corrode-resisting and durable
Structural Features：
The core structure of triple-flighted screw elements consists of three helically distributed flights, evenly and symmetrically arranged along the screw axis. The flights and the core shaft are formed as an integral structure through forging, ensuring structural integrity and strength. The flights are relatively narrow, creating three independent screw channels with balanced spatial distribution. The helical direction of the flights guides the axial advancement of materials. The surface is typically subjected to strengthening treatments to enhance wear resistance, making it suitable for long-term continuous operation. The overall design emphasizes the proportional coordination between the screw channels and flights, ensuring smooth material flow while achieving material splitting and conduction through the multi-flight layout.
Functional Roles:
Efficient Material Conveying and Homogenization: The triple-flighted design increases the contact area of flights per unit length significantly. Materials are conveyed simultaneously in three independent channels, reducing axial back-mixing. Meanwhile, the shearing action from the sides of the flights achieves initial homogenization. This results in higher conveying efficiency compared to double-flighted elements, making it particularly suitable for high-flow continuous production scenarios.
Low Shearing and Gentle Mixing: The narrower flights and multi-channel structure reduce the shear intensity on materials, preventing degradation of heat-sensitive materials (such as PVC and PC) caused by excessive shearing. Additionally, the multi-channel splitting effect enables initial distributive mixing of components, balancing conveying efficiency and material stability.
Suppression of Pressure Fluctuations: The symmetrical distribution of the three channels ensures more uniform pressure distribution of materials within the barrel, minimizing pressure fluctuations. This reduces fluctuations in extrusion output caused by sudden pressure changes, improving the dimensional accuracy of products.
Applications：
Processing of Heat-sensitive Plastics: In the extrusion of PVC pipes and production of PC sheets, its low-shear property protects the molecular chains of materials, avoiding discoloration or performance degradation while ensuring stable extrusion speed.
Conveying of High-flow, Low-viscosity Materials: For processes like film blowing or cable coating of low-viscosity resins (such as LDPE and EVA), its efficient conveying capability enhances production efficiency.
Preliminary Mixing of Multi-components: In the pre-mixing stage of plastic blending, the splitting effect of the three channels initially disperses different components, laying a foundation for subsequent fine mixing by kneading blocks. It is applicable to PE/PP blending and pre-mixing of plastics with tougheners, etc.
Production of Food and Pharmaceutical Packaging Materials: In scenarios requiring no contaminant degradation (such as PE cling film and pharmaceutical packaging films), its gentle processing property reduces additive precipitation, meeting food safety standards.
Triple-flighted Screw Element
Product Name: Triple-flighted Screw Elements
Model：φ15 mm ~φ350mm
Applicable Brands：Most well-known extruders on the market
Material: Tool steel, HIP, stainless steel, nickel-based alloy, cobalt-based alloy, etc.
Properties:Wear-resisting, Corrode-resisting and durable
Structural Features：
The core structure of triple-flighted screw elements consists of three helically distributed flights, evenly and symmetrically arranged along the screw axis. The flights and the core shaft are formed as an integral structure through forging, ensuring structural integrity and strength. The flights are relatively narrow, creating three independent screw channels with balanced spatial distribution. The helical direction of the flights guides the axial advancement of materials. The surface is typically subjected to strengthening treatments to enhance wear resistance, making it suitable for long-term continuous operation. The overall design emphasizes the proportional coordination between the screw channels and flights, ensuring smooth material flow while achieving material splitting and conduction through the multi-flight layout.
Functional Roles:
Efficient Material Conveying and Homogenization: The triple-flighted design increases the contact area of flights per unit length significantly. Materials are conveyed simultaneously in three independent channels, reducing axial back-mixing. Meanwhile, the shearing action from the sides of the flights achieves initial homogenization. This results in higher conveying efficiency compared to double-flighted elements, making it particularly suitable for high-flow continuous production scenarios.
Low Shearing and Gentle Mixing: The narrower flights and multi-channel structure reduce the shear intensity on materials, preventing degradation of heat-sensitive materials (such as PVC and PC) caused by excessive shearing. Additionally, the multi-channel splitting effect enables initial distributive mixing of components, balancing conveying efficiency and material stability.
Suppression of Pressure Fluctuations: The symmetrical distribution of the three channels ensures more uniform pressure distribution of materials within the barrel, minimizing pressure fluctuations. This reduces fluctuations in extrusion output caused by sudden pressure changes, improving the dimensional accuracy of products.
Applications：
Processing of Heat-sensitive Plastics: In the extrusion of PVC pipes and production of PC sheets, its low-shear property protects the molecular chains of materials, avoiding discoloration or performance degradation while ensuring stable extrusion speed.
Conveying of High-flow, Low-viscosity Materials: For processes like film blowing or cable coating of low-viscosity resins (such as LDPE and EVA), its efficient conveying capability enhances production efficiency.
Preliminary Mixing of Multi-components: In the pre-mixing stage of plastic blending, the splitting effect of the three channels initially disperses different components, laying a foundation for subsequent fine mixing by kneading blocks. It is applicable to PE/PP blending and pre-mixing of plastics with tougheners, etc.
Production of Food and Pharmaceutical Packaging Materials: In scenarios requiring no contaminant degradation (such as PE cling film and pharmaceutical packaging films), its gentle processing property reduces additive precipitation, meeting food safety standards.
