Extruder Screw
Your Professional Extruder Screw 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 |
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 |
|
Extruder Screw Diameter |
Φ15-Φ300mm (Customizable) |
|
Injection Screw Diameter |
Φ20mm-Φ220mm |
|
L/D Ratio |
15-46 (Customizable) |
|
Mould Clamping Force (Injection) |
250T-3200T |
|
Shot Weight (Injection) |
30G-30000G |
|
Screw Classification |
General type, pin type, barrier type, separation type, gas-exhausting type, etc. |
|
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 Extruder Screw
Versatile processing options
One of the extruder screw's greatest strengths is its ability to process many different materials. From films to flakes to regrind material, it can efficiently process a wide variety of materials and material forms. This significantly increases the versatility and flexibility of recycling plants.
Continuous melting
By melting the plastic material in the extruder screw, other solids such as wood, paper, sand, etc. can be effectively removed in a subsequent filtration process. This improves the quality of the end products.
Main Parts of Extruder Screw
Feed Zone
Function: Picks up raw plastic from the hopper and begins transporting it forward
Design: Deep channel depth to accommodate solid material
Key Point: Proper feed zone geometry ensures stable output and prevents bridging
Compression Zone (Transition Zone)
Function: Applies heat and pressure to melt the material
Design: Gradual reduction in channel depth to compress the plastic
Note: This zone is critical for melting and mixing performance
Metering Zone
Function: Homogenizes the melt and builds pressure before it enters the die
Design: Uniform channel depth, high shear
Importance: Determines final product consistency and throughput
Single-Screw
The most common type, featuring one helical screw for processing.
Twin-Screw
Consists of two parallel screws that can be either co-rotating or counter-rotating, providing better mixing and kneading.
Conical Screw
Characterized by a cone-shaped design, allowing for gradual compression of materials.
Stepper Screw
Features sections of different diameters along the length, useful for specific material processing.
Barrier Screw
Includes a barrier zone to enhance mixing and prevent material backflow.
Ventilated Screw
Designed with venting sections to remove volatiles during processing.
Mixing Screw
Specialized for improved mixing capabilities, often incorporating various mixing elements.
Materials Used for Extruder Screw
|
Material |
Characteristics |
Application |
|
38CrMoAlA (nitrided) |
Cost-effective, good wear resistance |
General plastics (PE, PP) |
|
SKD61 / W6Mo5Cr4V2 |
Tool steel, high hardness, wear/corrosion resistant |
Filled plastics, engineering resins |
|
Bimetallic alloy |
Fe or Ni-based with wear-resistant liner |
Abrasive or corrosive materials |
|
HIP alloys |
Hot Isostatic Pressed metal for extreme durability |
Recycled plastic, flame retard |
Customization Services
To meet diverse extrusion requirements across different industries, we provide customized extruder screw solutions tailored to specific materials, processing conditions, and production goals. We can adjust screw geometry, compression ratio, channel depth, material selection, surface hardening, and overall dimensions to ensure optimal melting, mixing, and output performance. Please contact us for technical support or detailed customization options.
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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