Bimetallic Screw Barrel

Your Professional Bimetallic 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
Model NO.	Dia15-300mm
Product Type	Extrusion Molding Machine
Assembly Structure	Integral Type Extruder
Screw Type	Single-Screw (Deep Screw Channel Structure)
Engagement System	Full Intermeshing
Exhaust	Don't Exhaust
Automation	Automatic
Computerized	Computerized
Plastic Processed	PE (Thermoplastic)
Feeding Mode	One Feed
Extruder Screw Diameter	Φ15-Φ300mm (Customizable)
Injection Screw Diameter	Φ20mm-Φ220mm
Mould Clamping Force (Injection)	250T-3200T
Shot Weight (Injection)	30G-30000G
Nitrided Layer Depth	0.5-0.8mm
Nitrided Hardness	900-1000HV
Nitrided Brittleness	Less Than Grade 1
Surface Roughness	Ra0.4
Linearity of Screw	0.015mm
Bimetallic Layer Depth	3mm
Chrome-plating Layer Depth	0.025-0.085mm
Hard-chrome Plating Hardness (After Nitriding)	≥950HV
Certification	ISO9001: 2008
Warranty	1 Year
Production Capacity	200 Sets/Month
Transport Package	Wooden Cases
Trademark	Zhongyang
Origin	China(Mainland)
HS Code	84779000

Advantages of Bimetallic Screw Barrel

01/

Extended Service Life
The bimetallic screw barrel system has a longer service life compared to conventional screw barrel systems. The wear-resistant inner layer ensures that the screw barrel can withstand high-wear applications, while the high-strength and high-temperature outer layer ensures that the screw barrel can withstand high-temperature applications. The result is a screw barrel system that can handle high-wear and high-temperature applications for extended periods without requiring replacement.

02/

Improved Molding Quality
The bimetallic screw barrel system offers improved molding quality compared to conventional screw barrel systems. The wear-resistant inner layer ensures that the plastic material is melted and mixed uniformly, while the high-strength and high-temperature outer layer ensures that the plastic material is injected into the mold cavity accurately. The result is a final product that is of high quality, with consistent dimensions and surface finish.

03/

Reduced Downtime
The bimetallic screw barrel system requires less maintenance compared to conventional screw barrel systems, resulting in reduced downtime. The wear-resistant inner layer ensures that the screw barrel can handle high-wear applications without requiring frequent maintenance, while the high-strength and high-temperature outer layer ensures that the screw barrel can handle high-temperature applications without requiring frequent replacement.

04/

Cost-effective
The bimetallic screw barrel system is cost-effective compared to conventional screw barrel systems. Although the initial cost of the bimetallic screw barrel system is higher, the extended service life and reduced maintenance and downtime costs result in significant savings in the long run.

Bimetallic Screw Barrel Material

A bimetallic screw barrel consists of:
Base Material (Outer Layer):
High-strength steel (e.g., 38CrMoAlA) – Provides structural support and durability.
Bimetallic Alloy Layer (Inner Coating):
Nickel-based alloys – Excellent corrosion resistance.
Tungsten carbide – Extreme wear resistance, used for fiber-reinforced plastics.
Cobalt-based alloys – Withstands high temperatures and chemical attack.
Chromium-based coatings – Balanced hardness and wear resistance.

Bimetallic Single Screw For Blowing Molding Machine (Dia15-300mm)

Main Applications OF Bimetallic Screw Barrel

1. Plastics Processing
• Profile extrusion (window and door profiles, pipes)
• Engineering plastic pelletizing (PA, PC, PPS with glass fiber)
• Cable coating (high-filler insulation layer production)

2. Rubber and Composites
• Tire compound mixing
• Seal extrusion (fluororubber, silicone rubber, and other special materials)

3. Environmental and New Energy
• Battery slurry preparation

4. Food and Pharmaceutical Industries
• Extrusion and puffing of starch or cellulose.
• Requires food-grade coating on the bimetallic barrel while keeping high strength and wear resistance.

Customization Services

To meet the different processing and wear-resistance requirements of our customers, we provide customized bimetallic screw barrel solutions for various materials and production applications. We can customize screw structures, barrel specifications, alloy materials, surface treatment, dimensions, and technical parameters according to your production needs. 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: How does a bimetallic screw barrel extend machine life?

A: A bimetallic screw barrel significantly reduces wear and tear, leading to:
Less frequent replacements – Extends the lifespan of both the screw and barrel.
Reduced downtime – Fewer stoppages for maintenance and part replacements.
Improved energy efficiency – Maintains consistent performance with minimal degradation.
Better product quality – Ensures uniform melting and mixing, minimizing defects.

Q: Which industries use bimetallic screw barrels?

A: Bimetallic screw barrels are widely used in industries requiring high-performance extrusion and molding, such as:
Plastic Extrusion – Pipes, profiles, films, and sheets.
Injection Molding – Automotive parts, electronic casings, and household goods.
Rubber Processing – Tire manufacturing and rubber sheets.
Recycling Industry – Processing of recycled plastics and contaminated materials.
Compounding & Masterbatch Production – Producing color concentrates and filled resins.

Q: What is a bimetallic screw barrel?

A: A bimetallic screw barrel is an advanced screw barrel that features a high-performance alloy layer fused onto a base material. This design enhances wear resistance, corrosion protection, and overall durability, making it suitable for processing abrasive and chemically reactive materials.
Base Material: High-strength steel (e.g., 38CrMoAlA).
Lining Material: Nickel-based alloys, tungsten carbide, or cobalt alloys for extreme wear and corrosion resistance.

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