Screw Barrels

Screw barrels are core components in plastic and rubber processing equipment such as extruders, injection molding machines, and blow molding machines, directly determining the equipment's plasticizing efficiency, product stability, and service life.

As a China Screw Barrel Manufacturer established in 1992, EJS specializes in the design and manufacture of high-quality screw barrels, with products widely used in various industries including plastics, rubber, chemicals, and food. We provide stable, reliable, and customizable screw barrel solutions for global OEM customers and end-users, balancing performance, lifespan, and long-term operating costs.

What are Screw Barrels?

A screw barrel consists of a screw and a barrel, and is a critical component for material conveying, plasticizing, mixing, and pressure forming.

In actual production, the material selection, processing precision, and surface treatment process of screw barrels directly affect:

Material plasticization uniformity

Output and energy consumption

Finished product quality stability

Overall equipment lifespan

Details and precision are the core standards that differentiate different screw barrel factories.

Core Advantages of EJS Screw Barrels

1. Mature Background and Scaled Manufacturing Capabilities

EJS was founded in 1992, initially starting with conical twin-screw barrels, and has developed to the present day with:

400+ full-time employees

21 professional workshops

Factory area of approximately 40,000㎡

Annual production of over 30,000 screw barrels

Long-term service to global OEM and brand customers

The factory is located on Jintang Island in Zhejiang Province – a well-known "Screw & Barrel Island" in the industry. While there are price differences and variations in quality among manufacturers here, EJS focuses on stable quality and long-term cooperation.

2. Carefully Selected Raw Materials, Multiple Steel Grades Available

EJS believes that high-quality materials are the foundation of all quality.

Based on different applications and working conditions, we offer a variety of steel options:

Steel Material	Typical Application
38CrMoAlA	General extrusion & injection
40Cr / 42CrMo	High-strength applications
1.8550 (34CrAlNi7)	High wear resistance
1.8519 (31CrMoV9)	High load & torque
D2	Abrasive materials
SKD61 / SKD11	High temperature & wear
Hastelloy	Corrosive materials

3. Comprehensive Range of Screw Barrels

As a professional Screw Barrel Supplier, EJS offers a complete product line:

Extruder Screw Barrel

Twin Screw Barrel (Parallel / Conical)

Injection Moulding Screw Barrel

Blown Moulding Screw Barrel

Rubber Screw Barrel

Bimetallic Screw Barrel

Hardfacing Screw & Barrel

Customized Extruder Parts (Die, Gearbox, Nozzle, etc.)

Most products are OEM customized, and you may be using them without knowing they come from EJS.

4. Bimetallic and Wear-Resistant Solutions

EJS is one of the earliest manufacturers in China to enter the Bimetallic Screw Barrel field:

Multiple alloy systems available

Tungsten Carbide content up to 35% / 45%

Plasma Spray Coating:

Ni60

Colmonoy 56

Colmonoy 83

Suitable for high wear, high corrosion, and high filler material applications.

Screw Barrel Application Industries

EJS Screw Barrels have been widely used in the following fields:

PVC building materials, sheets

Soft and hard pipes, profiles, and tubing

Wires and cables (insulation/sheathing)

Rubber products (profiles, hoses, tires)

Silicone microporous tubes, medical tubing

Plastic modification (single screw/twin screw)

Film blowing, injection molding, blow molding

Recycled plastics and recycling systems

Chemical, pharmaceutical, food, and agricultural processing