Extruder Closed Screw Barrels
Product Name: Closed-end Barrel
Model：φ11 mm ~φ350mm
Applicable Brands：Most well-known extruders on the market
Material: 45 Steel, 38CrMoAlA, Hastelloy C, etc.
Properties:Wear-resisting, Corrode-resisting and Durable
Structural Features：
Closed Cavity Design：The barrel features a closed structure at one or both ends, forming a fully enclosed cavity with no 拼接 gaps or detachable components. This ensures a continuous, sealed material flow path from the feeding end to the extrusion die.
Material-specific Selection：Common materials include nitrided steel (for wear resistance), Hastelloy C (for chemical corrosion resistance), and stainless steel (for food-grade hygiene requirements). The choice of material is tailored to the properties of the processed materials (e.g., abrasiveness, chemical reactivity, or cleanliness needs).
Optimized Structural Parameters：The inner wall is precision-machined to ensure smoothness and uniform clearance with the screw, balancing heat conduction efficiency and mechanical strength. The length-to-diameter ratio (L/D) and cavity volume are designed based on material flow characteristics to avoid dead zones or excessive pressure loss.
Functions：
Providing a Controlled Material Processing Environment：It offers an enclosed space for heating, melting, kneading, and conveying materials. External heaters and cooling systems regulate the cavity temperature, while the screw’s rotation generates shear force, ensuring materials are uniformly plasticized into a molten state.
Maintaining High Pressure：The closed structure effectively retains pressure within the cavity, critical for processing high-viscosity materials (e.g., rubber, hot-melt adhesives) that require sufficient pressure to flow smoothly through the die.
Enhancing Processing Stability：The sealed design eliminates external interference (e.g., air ingress, material leakage), ensuring consistent material flow and plasticization quality. This directly improves the stability of extrusion output and the dimensional accuracy of products.
Applications：
Plastic Processing Industry：Used in the extrusion of precision plastic products such as medical catheters, automotive sealing strips, and thin-walled tubes, relying on its ability to ensure uniform plasticization and high dimensional control.
Rubber Manufacturing ：Applied in rubber extrusion processes (e.g., O-rings, rubber hoses). The closed cavity maintains pressure, preventing degradation of high-viscosity rubber compounds and ensuring molding quality.
Food Processing Sector：Equipped with food-grade stainless steel barrels, it is used in food extrusion equipment (e.g., for pasta, cereal products). It meets hygiene standards while enabling uniform mixing and shaping of food materials.
Specialty Material Extrusion：Suitable for processing corrosive materials (e.g., fluoropolymers) with Hastelloy C barrels, or abrasive materials (e.g., filled plastics) with wear-resistant nitrided steel barrels, ensuring long-term stable operation.
The selection of a closed-end barrel requires comprehensive consideration of material properties (abrasiveness, corrosion resistance), extruder specifications, and production requirements (efficiency, product precision) to achieve optimal processing performance.
Extruder Closed Screw Barrels
Product Name: Closed-end Barrel
Model：φ11 mm ~φ350mm
Applicable Brands：Most well-known extruders on the market
Material: 45 Steel, 38CrMoAlA, Hastelloy C, etc.
Properties:Wear-resisting, Corrode-resisting and Durable
Structural Features：
Closed Cavity Design：The barrel features a closed structure at one or both ends, forming a fully enclosed cavity with no 拼接 gaps or detachable components. This ensures a continuous, sealed material flow path from the feeding end to the extrusion die.
Material-specific Selection：Common materials include nitrided steel (for wear resistance), Hastelloy C (for chemical corrosion resistance), and stainless steel (for food-grade hygiene requirements). The choice of material is tailored to the properties of the processed materials (e.g., abrasiveness, chemical reactivity, or cleanliness needs).
Optimized Structural Parameters：The inner wall is precision-machined to ensure smoothness and uniform clearance with the screw, balancing heat conduction efficiency and mechanical strength. The length-to-diameter ratio (L/D) and cavity volume are designed based on material flow characteristics to avoid dead zones or excessive pressure loss.
Functions：
Providing a Controlled Material Processing Environment：It offers an enclosed space for heating, melting, kneading, and conveying materials. External heaters and cooling systems regulate the cavity temperature, while the screw’s rotation generates shear force, ensuring materials are uniformly plasticized into a molten state.
Maintaining High Pressure：The closed structure effectively retains pressure within the cavity, critical for processing high-viscosity materials (e.g., rubber, hot-melt adhesives) that require sufficient pressure to flow smoothly through the die.
Enhancing Processing Stability：The sealed design eliminates external interference (e.g., air ingress, material leakage), ensuring consistent material flow and plasticization quality. This directly improves the stability of extrusion output and the dimensional accuracy of products.
Applications：
Plastic Processing Industry：Used in the extrusion of precision plastic products such as medical catheters, automotive sealing strips, and thin-walled tubes, relying on its ability to ensure uniform plasticization and high dimensional control.
Rubber Manufacturing ：Applied in rubber extrusion processes (e.g., O-rings, rubber hoses). The closed cavity maintains pressure, preventing degradation of high-viscosity rubber compounds and ensuring molding quality.
Food Processing Sector：Equipped with food-grade stainless steel barrels, it is used in food extrusion equipment (e.g., for pasta, cereal products). It meets hygiene standards while enabling uniform mixing and shaping of food materials.
Specialty Material Extrusion：Suitable for processing corrosive materials (e.g., fluoropolymers) with Hastelloy C barrels, or abrasive materials (e.g., filled plastics) with wear-resistant nitrided steel barrels, ensuring long-term stable operation.
The selection of a closed-end barrel requires comprehensive consideration of material properties (abrasiveness, corrosion resistance), extruder specifications, and production requirements (efficiency, product precision) to achieve optimal processing performance.
