An
extruder screw barrel is a critical component of an extrusion system. It consists of several key parts that work together to ensure the efficient and effective processing of the plastic material. The key components of an extruder screw barrel include:
1.Screw: The screw is the main component of the extruder screw barrel. It is a long, threaded rod that rotates within the barrel, pushing the plastic material forward as it turns. The design of the screw can vary depending on the type of material being processed and the desired output.
2.Barrel: The barrel is the cylindrical housing that contains the screw. It is typically made of steel and is lined with a wear-resistant material, such as a nitrided steel alloy, to protect against wear and tear.
3.Feed throat: The feed throat is the opening at the beginning of the barrel where the plastic material is fed into the extruder. It is designed to ensure a consistent and steady flow of material into the barrel.
4.Heater bands: The heater bands are heating elements that wrap around the barrel to heat the plastic material as it moves through the extruder. This helps to soften the material and make it easier to process.
5.Cooling system: The cooling system is designed to cool the extruded material as it exits the extruder, preventing it from deforming or melting.
6.Gearbox: The gearbox is a component that controls the speed of the screw, allowing for precise control of the extrusion process.
7.Motor: The motor powers the gearbox, rotating the screw within the barrel to process the plastic material.
8.Die: The die is a component located at the end of the extruder that shapes the extruded material into the desired form.
All of these components work together to create a continuous process for melting, mixing, and extruding plastic materials into the desired shape or form.
Extruder screw barrel for blowing film extruder machine
Material: 38 CrMoAlA(JIS SACM645); 42 CrMo(JIS SCM440)
Depth of nitrogen layer: 0.6~0.8mm
Nitrided Brittleness: above 1 stage
Surface Roughness: Ra0.4 um
Screw straightness: 0.015mm
Hardess of surface chromium-plating after Nitriding: HV≥950HV
Chromium plating Depth: 0.025-0.085mm
Alloy Depth: 2.5mm-4mm
Products Are Processed By The Following Steps:
Hot Treatment
Nitriding Treatment
Electroplating Hard-chrome layer
Hi-frequency Quenching
Spray Coating Bimetallic Layer Of Corrosion And Abrasion Resistant
Vacuum Quenching
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