Screw Barrel

Your Professional Screw Barrel Manufacturer & Supplier

Founded in 2006, Zhejiang Zhongyang Screw Manufacturing Co., Ltd. has developed steadily over nearly two decades of continuous growth. The company now operates a 50,000㎡ production facility with more than 200 employees, and has become a recognized manufacturer in China's screw and barrel industry.
With strong engineering capability and mature production experience, Zhongyang focuses on the design, manufacturing, refurbishment, and supply of high-performance screws, barrels, and related components for plastic and rubber machinery.

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Why Choose Us

Advanced Equipment

The company is equipped with over 200 CNC machining centers, PTA welding systems, nitriding workshops, and heat treatment facilities, ensuring stable processing quality and high precision production.

Custom Solutions

We provides flexible OEM and ODM services, supported by continuous engineering development to deliver customized screw and barrel solutions for different industrial applications.

Quality Control

A complete quality inspection system is in place, including material testing, dimensional measurement, hardness testing, and metallographic analysis, ensuring consistent product performance.

Global Service

Since 2008, we has been serving international markets, providing technical consultation, on-site inspection, measurement support, and one-stop procurement services for global customers.

Specification

Item	Specification
Base Material	38CrMoAlA
Surface Treatment	Nitrided or Bimetallic
Base Hardness	HB 240 – 280
Nitrided Layer Hardness	HV 850 – 1000
Nitriding Depth	0.45 – 0.7 mm
Brittle Nitride Grade	≤ 2
Chrome Layer Thickness	0.05 – 0.10 mm
Optional Specifications	SJS 51 / SJS 55 / SJS 65 / SJS 80

Screw Barrel Importance

Product Quality

Screw barrels directly impact the final product's properties, including strength, elasticity, color, and surface finish.

Efficiency and Longevity

High-quality screw barrels are designed for durability and resistance to wear and corrosion, ensuring reliable performance and reducing maintenance needs.

Material Compatibility

Different screw and barrel designs are tailored to handle specific materials, ensuring optimal processing and preventing damage or performance issues.

Screw Barrel Material

Screw barrels are typically made from high-quality materials such as nitrided steel (38CrMoAlA), bimetallic alloys, or hardened tool steel to provide excellent wear resistance, corrosion protection, and durability. Nitrided steel offers high hardness and longevity, while bimetallic screw barrels have a special alloy coating to withstand abrasion and chemical wear, making them ideal for high-performance applications. Hardened tool steel is used for extreme conditions where maximum toughness is required.

Screw Barrel Function

A screw barrel is a critical component in machinery used for the extrusion, injection molding, and processing of materials such as plastics, rubber, and metals. It consists of a helical screw rotating inside a cylindrical barrel, where raw materials are melted, mixed, and conveyed to form finished products. The efficiency and performance of the screw barrel directly impact the quality and productivity of the manufacturing process.

Types of Screw Barrel

Single Screw

Commonly used for simpler applications with a single input material.

Twin Screw

Used for more complex processes involving multiple materials, offering better mixing and control.

Bimetallic Screw Barrels

Features a dual-material construction for enhanced wear and corrosion resistance, often used in demanding applications, according to some manufacturers.

Screw Barrel Applications

Extrusion

Forming materials into continuous shapes, like pipes or films.

Injection Molding

Shaping materials into specific forms by injecting them into molds.

Other Plastic Processing

Used in various other processes where controlled melting and mixing of materials is required.

Customization Services

To meet the different production needs of our customers, we offer custom screw barrel solutions for a wide range of applications and materials. We can customize screw design, barrel structure, material options, surface treatment, dimensions, and other specifications according to your processing requirements. Please contact us for more details or technical support.

Packaging and Shipping

Packaging	Wooden case, plywood case, or customized export packaging
Transportation methods	Sea freight, air freight, railway, or express delivery

Our Certificate

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FAQ

Q: What is a screw barrel used for?

A: A screw barrel is a critical component in machinery used for the extrusion, injection molding, and processing of materials such as plastics, rubber, and metals. It consists of a helical screw rotating inside a cylindrical barrel, where raw materials are melted, mixed, and conveyed to form finished products.

Q: What materials are used in manufacturing screw barrels?

A: Screw barrels are typically made from high-quality materials such as nitrided steel (38CrMoAlA), bimetallic alloys, or hardened tool steel to provide excellent wear resistance, corrosion protection, and durability. Nitrided steel offers high hardness and longevity, while bimetallic screw barrels have a special alloy coating to withstand abrasion and chemical wear, making them ideal for high-performance applications. Hardened tool steel is used for extreme conditions where maximum toughness is required.

Q: What is the lifespan of a screw barrel?

A: The lifespan of a screw barrel depends on factors such as material quality, maintenance, and operating conditions. Generally, a well-maintained screw barrel lasts between 3 to 10 years.

Zhejiang Zhongyang Screw Manufacturing Co., Ltd. is one of the most professional screw barrel manufacturers and suppliers in China, also supports customized service. Please feel free to buy durable screw barrel at competitive price from our factory.