Feed Screws
Your Professional Feed Screws 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.
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 |
Description |
|
Place of Origin |
Zhejiang, China |
|
Diameter Range |
Φ25 – Φ250 mm |
|
Base Material |
38CrMoAlA |
|
Process |
Nitriding / Bimetallic |
|
Nitrided Hardness |
HV 900 – 1000 |
|
Nitrided Case Depth |
0.45 – 0.8 mm |
|
Nitrided Brittleness |
≤ Grade 2 |
|
Surface Roughness |
Ra 0.4 |
|
Screw Straightness |
0.015 mm |
|
L/D Ratio |
24 – 33 |
|
Bimetallic Alloy Layer Thickness |
2 – 2.5 mm |
Benefits of Feed Screws
A large diameter to prevent “boring” through products, or products bridging over the screw's perimeter
Differential action between flights to produce low flow rates with a high screw RPM
Uniform and pulse-free feeder discharge
Multiple screws with common diameters to eliminate feed tube changes and resulting dead zones
Types of Feed Screws
Single-shaft feed screws
Have an insignificant barrier effect. They are not suited to bulk materials which can become fluid, but are ideal for e.g. powder.
Twin-shaft feed screws
Provide a good barrier effect, making them suited to bulk materials which can become fluid and products which cling and are sticky.
Feed Screws Material
Base Material
Hardened Nitrided Steel (38CrMoAlA, 42CrMo) – Provides excellent wear resistance.
Bimetallic Alloy (Nickel-Based, Tungsten Carbide, or Cobalt Alloy Coating) – Enhances durability and longevity.
Coating & Surface Treatment
Plasma Nitriding – Improves hardness and corrosion resistance.
Bimetallic Coating – Extends lifespan in high-wear applications.
Applications of Feed Screws
Feed screws and extrusion screw segments are used for transporting, mixing or kneading powders and dry bulk materials. Twin-screw extruders are used for processing Powder Coatings, Thermoplastics, Biopolymers, Medical Plastics, Chemicals, Food and Pharmaceuticals.
Feed screws are also used to weigh materials, for example in the food and pharmaceutical sectors. In these applications, a specific quantity of a substance can be dosed out with each turn. Eccentric worm-drive pumps are often used to extract and pump fluids and materials of medium viscosity.
Customization Services
To meet the diverse feeding and conveying requirements of different industries, we provide customized feed screw solutions for a wide range of materials and processing applications. We can tailor screw design, flight geometry, material selection, surface treatment, dimensions, and other technical specifications 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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