Close this search box.

What is the role of the twin screw extruder screw elements in an extruder?

Twin screw extruder screw elements are important components in a twin-screw extruder and their role is very critical, wielding a profound impact on the efficiency and outcomes of plastic processing and many other industrial processing. This article will analyze what role the extruder screw elements play in the foundation and process from the aspects of its function, structure and corresponding benefits, applications, and impact of change.

twin screw extruder screw elements

The functions of twin screw extruder elements

The functions of twin screw extruder elements mainly include the following aspects:

1. Pretreatment of plastic particles

The first function of the twin screw extruder elements is to pretreat plastic particles. When the plastic particles enter the twin screw extruder elements, the rotation of the thread pushes them into the inside of the barrel, and during the pushing process, the plastic particles are heated, melted and mixed. Through the action of twin screw extruder elements, plastic particles can be evenly heated, melted, and fully mixed with other additives to ensure the uniformity and quality of plastic raw materials.

2. Increase extrusion pressure

The second function of twin screw extruder elements is to increase extrusion pressure. When the plastic particles are pushed into the barrel, as the twin screw extruder elements rotates, the plastic particles are gradually squeezed to the exit of the barrel. During this process, due to the presence of twin screw extruder elements, the plastic particles will encounter a certain resistance, thus forming a certain extrusion pressure. This extrusion pressure can make the plastic particles flow more evenly and push them smoothly through the die to form the desired product.

3. Adjust the extrusion speed

The third function of the twin screw extruder elements is to adjust the extrusion speed. By adjusting the rotation speed of the twin screw extruder elements, the feeding speed and extrusion speed of the plastic pellets can be controlled. When it is necessary to speed up the extrusion speed, the rotation speed of the twin screw extruder elements can be increased so that the plastic particles can be quickly extruded through the barrel; when it is necessary to slow down the extrusion speed, the rotation speed of the twin screw extruder elements can be reduced so that the plastic particles can slowly pass through the barrel. Extrude. By adjusting the threaded components, precise control of the extrusion speed can be achieved to meet the production needs of different products.

4. Keep the barrel temperature stable

The fourth function of the threaded component is to keep the barrel temperature stable. In a twin-screw extruder, the temperature of the barrel is very important to the plastic processing process. Too high or too low temperature will lead to a decrease in the quality of the product. The twin screw extruder elements can conduct heat to the inside of the barrel through its own heating device to keep the barrel at a certain temperature. At the same time, the twin screw extruder elements can also control the flow rate of plastic in the barrel by adjusting the feed amount and rotation speed to ensure the uniformity of heating of the plastic in the barrel, thereby maintaining the stability of the barrel temperature.

Twin-screw extruder elements play an important role in plastic processing. It can pretreat plastic pellets, increase extrusion pressure, adjust extrusion speed, and keep the barrel temperature stable. Through the function of twin screw extruder elements, high-quality production of plastic products can be achieved and people’s needs for various plastic products can be met.

The structure of the extruder screw elements and their corresponding benefits for the extruder

Dual-Screw Configuration

Twin-screw extruder screw elements exhibit a dual-screw configuration, either co-rotating or counter-rotating.

Corresponding Benefit: Improved homogeneity in material composition, leading to consistent product quality and properties.

Helical Flighting

Incorporating helical flights, these screw elements facilitate material movement and conveyance.

Corresponding Benefit: Enhanced processing efficiency and higher production rates due to a more consistent and controlled material flow.

Intertwining Screw Profiles

Screw profiles are intricately designed to interlock.

Corresponding Advantage: Ability to handle a wide range of materials and meet diverse processing requirements, offering flexibility in production.

Modular Construction

Screw elements often feature a modular design.

Corresponding Benefit: Allowing for versatile configurations. This modularity enables easy customization, adaptation, and rearrangement to meet specific processing needs.
Optimal control over critical parameters such as screw speed and temperature, ensuring precise and repeatable processing conditions.

Surface Treatments and Coatings

To enhance durability and resist wear and corrosion, twin-screw extruder screw elements may undergo surface treatments or coatings.

Corresponding Benefit: Reduced maintenance requirements and prolonged operational life, resulting in cost-effectiveness over the long term.


Plastic and Polymer Processing

Twin screw extruders are instrumental in the plastic and polymer industry, where they compound, blend, and shape raw materials into products like pipes, sheets, and films. They also play a key role in producing masterbatches for coloring and improving plastic properties.

Food and Feed Processing

In the food sector, twin screw extruders are essential for cooking, shaping, and texturizing ingredients, producing snacks, cereals, and pet food.


These extruders have a vital role in pharmaceuticals, facilitating the mixing and granulation of drug compounds and the creation of dosage forms such as tablets and capsules, ensuring precise control over the mixing and granulation of pharmaceutical ingredients.

Chemical Industry

Twin screw extruders are utilized for mixing, reacting, and compounding chemicals, yielding a broad spectrum of chemical products and compounds.

Multi-Industry Applications

Twin-screw extruders find application across diverse sectors, including rubber compounding, powder coating production, medical extrusion, renewable energy (biomass processing), textile (fiber production), ceramics (shaping and extrusion), building materials(PVC profiles, pipes, and structural components), and more.

The transformative impact of twin screw extruder screw elements

The transformative impact of screw elements of twin screw extruders is truly remarkable. These innovative components play a crucial role in revolutionizing various industries, including food, pharmaceuticals, and plastics.

Thanks to twin screw extruder elements, industries can now produce consistently high-quality products with minimal variations. This not only enhances customer satisfaction but also boosts the reputation of these industries as providers of top-notch products.

But the benefits don’t stop there. The reduced material waste achieved through twin extruders brings about significant cost savings for manufacturers. By maximizing the utilization of raw materials and minimizing waste, companies can optimize their production processes and achieve greater profitability. This is a win-win situation for both businesses and the environment.

Moreover, the enhanced efficiency offered by twin extruders is a game-changer in the realm of materials and product development. The flexibility of these extruders has opened up a world of possibilities for researchers and innovators. They can now explore new materials and create groundbreaking products that were previously unimaginable. From advanced pharmaceutical formulations to cutting-edge plastic innovations, twin extruders have become the catalysts for progress and innovation.

Screw elements of twin screw extruders have truly transformed various industries. Their precision, uniformity, and flexibility have paved the way for reduced material waste, improved product quality, and enhanced efficiency. With these advancements, manufacturers can enjoy significant cost savings while delivering consistently high-quality products.

Why Choose Us

Abundant Extruder Equipment Drawings

Having collaborated with numerous twin-screw extruder manufacturers over the years, we have amassed an extensive collection of equipment model drawings. This enables us to provide rapid and accurate thread component replacement services to our customers.

We have served as a reliable supplier to many leading twin-screw extruder manufacturers and plastic compounding enterprises, including Leistritz, Coperion, Krauss Maffei, Jwell, CPM, KY, and 90% of China’s prominent brands…

Our clientele extends to renowned compounding companies such as KINGFA, HARMONY COMPANY, WANHUA, PRET, KUMHO-SUNNY, DSM, Nanjing JIN SHAN Automotive Engineering Plastics Co., LTD. All of them are prominent in the compounding industry, and we not only provide them with screw elements but also supply TSE equipment.

Employing Advanced Techniques

We utilize European high-speed steel powder processing technology, combined with meticulous heat treatment processes, ensuring that our products match the wear and corrosion resistance of international brands.

Precision Machining

CNC machining ensures precise component shapes and tolerances.
Internal spline checks guarantee component interchangeability.
Prepared technical information and fixtures for various extruder brands ensure timely production.

Tailored Industry Solutions

Modern Management System Ensures 100% Product Qualification and Traceability
Our professional technical team offers timely and accurate mapping sample design and comprehensive technical support.

Quality Assurance

We source materials from domestic brands and European twin-screw specialty materials suppliers.
Rigorous elemental analysis and metallurgical inspections ensure product quality.


Nanjing SiKeRun Machinery Co., Ltd. has dedicated over 20 years to the design, production, and after-sales service of twin-screw extruders.

Our primary focus is on researching, developing, and manufacturing parallel twin-screw extruders and associated components. Specializing in the creation of high-wear-resistant, corrosion-resistant screw components, we also provide technology diagnosis services to assist customers in identifying and resolving technical issues. This includes offering tailored solutions and customized products to meet individual requirements.

In China, SKR’s production capacity ranks among the top 4. We not only support and provide replacement parts for leading domestic machinery manufacturers but also export our products to countries such as Germany, Japan, South Korea, India, Brazil, Taiwan, Singapore, and more.

If you have any needs, feel free to contact us for a consultation! Our professionals will address your inquiries and provide recommendations.

Get Free Quote