Screw Barrel Material
We are committed to providing system solutions for the plastics industry and providing high-quality screw barrel material. After years of technical accumulation, we provide products including nitriding screw barrel, bimetallic injection screw, bimetallic barrel, through hardened screw, etc.
Why Choose Us
Production Capacitie
We have two factories with about 9000 square meters construction area located in Zhoushan. Our production capacities can reach 1500 screw barrel sets monthly that enable us to deliver products to our customers in a short time.
Professional Production Equipment
3-axis CNC, 4-axis CNC, Screw Root Diameter Grinding Machine, Centrifugal Casted Furnace, Vacuum Quenching Furnace, Lathe, Hardness Tester, Metallographic Microscope.
Global Market
Our products were widely exported to Southeast Asia, Europe, Middle East, North America, South America and Africa.
Quality Assurance
The R&D, design and production of each of our product focuses on technological innovation and precision manufacturing, strictly controlled in accordance with the quality management system to ensure the performance and quality of each factory equipment.
Bimetallic Screw Barrel
Bimetallic Screw Barrel Screws are by PTA welding while barrel with centrifugal casting. Alternative screw can do HVOD fully coated with extreme wear situation.
Nitriding Screw Barrel
Nitriding Screw Barrel Nitrided screw is standard for common plastic processing, which is made by 38CrMoAlA (SACM645, 8550) steel and with gas or plasma nitrition on screw surface to get a surface hardness.
Screw Barrel Glass Fiber
Screw Barrel Glass Fiber Tool steel with heat treatment to hardness around 60-62HRC can offer high performance against most engineering plastics adding less than 40% glass fiber in a comfortable price.
HVOF Full Cover Screw
HVOF Full Cover Screw HVOF screw is made by high velocity oxygen fuel sprayed coating tungsten carbide on the entire surface of screw.
Chrome Plating Screw Barrel
Chrome Plating Screw Barrel And it can obtain a high hardness layer with a low friction coefficient, and has certain additional high wear resistance, corrosion resistance and high temperature resistance.
Chrome Plating Screw Barrel Specification
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Size： |
Dia.12-100mm |
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Length： |
<3,000mm |
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Hardness： |
1800-3000HV |
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Thickness： |
2-5μm |
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Warranty Period： |
1 Year |
Corrosion Resistance
One of the main attributes of chrome plating is its ability to improve corrosion resistance. The protective layer of chromium shields the screw barrel from oxidation, preventing rust.
Improves Durability
The hard layer of chromium can protect screw barrels from extreme weather and temperatures, and even shields it from impact damage.
Enhances Appearance
The chrome plating process leaves a smooth, attractive finish. Chrome plating can even restore an old screw barrels appearance by removing faults to make it look brand new.
Reduces Friction
Chrome plating is an ideal treatment for moving screw barrels, because it helps reduce friction. Low friction allows for more efficient moving parts and extends the life of the screw barrels.
Extrusion: In extrusion processes, chrome plating screw barrels are used to push materials, such as plastic pellets or rubber compounds, through a heated barrel. The material is melted and then forced through a die to create continuous shapes, such as pipes, tubing, or sheets.
Injection Molding: Chrome plating screw barrels play a crucial role in injection molding machines. They are responsible for melting the raw material (usually plastic pellets) and injecting it into a mold cavity under high pressure.
Compounding: In compounding processes, chrome plating screw barrels are used to mix and blend various materials together. This can include additives, fillers, and pigments with a base material to create custom polymer compounds with specific properties.
Extrusion Blow Molding: In blow molding processes, chrome plating screw barrels help melt and shape the plastic material into a hollow form, which is then blown into a mold cavity to create products like bottles, containers, and automotive components.
Bimetallic Screw Barrel Parameters
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ID Size： |
Dia.12-250mm |
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Length： |
<8,000mm |
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Alloy Grade： |
Fe-Based/Ni-Based |
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Hardness： |
60-62HRC |
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Alloy Thickness： |
2-5mm |
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Straightness： |
0.02 mm/m |
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Roughness： |
Ra 0.4 |
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Max. Temperature： |
< 450° |
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Warranty Period： |
1 Year |
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Coating Density: |
98-99.8% |
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Applicable Plastic: |
PVC, PE, ABS, PET, PP, Rubber |
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Surface Finishing: |
Polished |
Strong wear resistance: The alloy layer has extremely high hardness, which can effectively resist the wear of plastic melt and fillers, and extend the service life of the equipment.
Good corrosion resistance: The alloy layer has good corrosion resistance, can resist corrosion from various chemicals, and ensure product quality.
Excellent heat dissipation performance: The alloy layer has good thermal conductivity, which can effectively dissipate heat and prevent the plastic melt from decomposing in the barrel.
Improve production efficiency: Due to strong wear resistance, the downtime of the equipment is reduced and the production efficiency is improved.
Improve product quality: Due to good heat dissipation performance, the plastic melt is mixed evenly in the barrel, and the product quality is improved.
Application of Bimetallic Screw Barrel
Extrusion of engineering plastics
Bimetallic screw barrels are ideal for processing these materials because they can withstand high temperatures and abrasion without deforming.
Processing of abrasive materials
Bimetallic screw barrels are designed to handle these abrasive materials and can significantly extend the life of the screw barrel compared to traditional single-metal screw barrels.
Blown film extrusion
Blown film extrusion is a process used to produce plastic films for packaging, agricultural, and industrial applications. Bimetallic screw barrels are ideal for this application due to their high temperature and abrasion resistance.
Pipe and profile extrusion
Bimetallic screw barrels are also used in the production of pipes and profiles, especially those made from engineering plastics or abrasive materials.
Material Selection: High-quality alloys and coatings tailored to your needs.
Screw Configuration: Varying designs for different material processing applications.
Length-to-Diameter Ratios (L/D Ratio): Optimized for efficient processing.
Cooling & Heating Systems: Designed to meet precise thermal requirements.
●Never run the screw barrel without loading any polymer, never run screw barrel in cold condition.
●Always filter the material before loading into the hopper to remove any hard material like stone or metal to enter the screw barrel damage it.
●Avoid making drastic design changes in the screw barrel.
●Do not increase rpm of the screw than the recommended speed by the manufacturer of your machine.
●Preheat treatment (hardening tempering) is a must on the raw material to ensure the strong core of the screw and barrel.
●It is advisable to re-nitride the screw barrel at a regular interval of about 10 months of working.
●Contact our sales team online via email at info@rootier.cn and provide the products and quantities you need to order and your customization requirements.
●If you don't have drawings, we can help you measure your current screw barrel. Also we can design the screw barrel and select the matched steel materials based on your polymers processing application.
●Once everything is confirmed, we will send you the drawing for confirmation.
●Once approved by you, we will send you a quote so you can place your order and we will begin working on your custom order.
●According to the delivery time, we will arrange shipment after receiving the remaining payment.
Packaging and Delivery
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Payment: |
T/T, Trade Assurance, Paypal, Western Union,Alipay, Credit Card, L/C etc. |
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Safe Packing: |
Plywood Case |
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Shipping: |
Express, Air, Sea |
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Delivery Date: |
7-15Days |
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