Screw Segment

This series of precision threaded components is a high-performance consumable designed for the core section of co rotating twin screw extruders. This component manufactured by Nanjing Kelongwell Chemical Machinery Co., Ltd. is specifically designed for high-strength mixing, shearing, and conveying processes, and is widely used in plastic modification, engineering plastic reinforcement, color masterbatch preparation, and other plastic granulation production lines. With excellent geometric design and material properties, it ensures the homogenization effect and process stability of the melt.

·High quality material selection: Made of W6Mo5Cr4V2 (6542) high-speed steel and wear-resistant materials such as powder metallurgy (ASP), it meets the long-term use requirements under high torque and high wear conditions.
·Precision spline processing: Using CNC grinding technology to ensure the accuracy of spline fit, achieve precise self-cleaning function and axial alignment, and provide stable process guarantee for plastic granulation.
·Diversified component configurations: including conveying components, kneading blocks, mixing discs, and other types, can provide specific shear ratios and distribution mixing capabilities according to different formula requirements.
·Modular design: Fully interchangeable with mainstream international brands, making it easy to flexibly adjust the combination of threaded components and adapt to various plastic granulation process requirements.
·High surface smoothness: The surface roughness can reach Ra ≤ 0.4 μ m, effectively reducing material adhesion and lowering the risk of degradation during high-temperature processing.

Choosing Nanjing Kelongwell Chemical Machinery Co., Ltd. as a supplier of threaded components will bring significant competitiveness to your plastic granulation production line. Our product is not a simple substitute, but a key component that enhances the overall efficiency of the production line.
·Improving production efficiency: The optimized geometric structure of the components provides sufficient shear while reducing the peak temperature of the melt, resulting in a 15% -20% increase in plastic granulation process capacity.
·Ensure finished product quality: precise self-cleaning lines shorten material retention time, avoid black spots and degradation issues, and produce uniform and high-performance plastic particles.
·Reducing comprehensive costs: By using powder metallurgy materials and special heat treatment processes, the service life of threaded components is significantly extended, reducing downtime and maintenance costs caused by threaded component replacement. It is particularly suitable for plastic modification scenarios with high filling and high wear.

This series of threaded components is widely used in co rotating twin screw extruders, covering the following main industries and materials:
·Plastic modification and blending: Glass fiber reinforcement and mineral filling of engineering plastics (PA, PC, ABS).
·Preparation of color masterbatch: Efficient dispersion of high concentration black, white, and colored masterbatch.
·Reactive extrusion: polymer alloying, chain extension reaction, etc.
·Recycling and granulation: efficient recycling, devolatilization, and plastic granulation of post consumer and post industrial waste plastics.
·Special materials: high filling composite materials, thermoplastic elastomers (TPE/TPV), wood plastic composites (WPC).

Our company provides comprehensive OEM/ODM customization services. Whether it is non-standard diameter, special aspect ratio plastic granulation thread components, or customized spline parameters, the technical team of Nanjing Kelongwell Chemical Machinery Co., Ltd. can provide exclusive design according to your extruder model and formula process. At the same time, we can provide material selection recommendations for different wear and corrosion conditions to ensure the optimal match between threaded components and process conditions.

Q1: How to determine the optimal combination of threaded components for my specific plastic granulation formula?
A: The optimal combination depends on the material properties and dispersion requirements. For high filling plastic formulas, it is recommended to increase the number of kneading blocks and reverse elements to enhance the mixing effect. Engineers from Nanjing Kelongwell Chemical Machinery Co., Ltd. can simulate the distribution of shear force and residence time based on your formula, and design the most reasonable combination of threaded components for you to meet the requirements of plastic granulation process for dispersion and homogenization.

Q2: What is the typical service life of your company's threaded components in glass fiber reinforced plastic modification?
A: Under high wear conditions such as 30% -50% fiberglass reinforced PA and PP, our powder metallurgy (ASP) material threaded components can usually be used for 6000 to 10000 hours, which is much better than the 3000-4000 hour service life of conventional 6542 high-speed steel materials, significantly reducing replacement frequency.

Q3: Can your company's threaded components be compatible with other brands of extruders?
A: Yes, it is possible. Our threaded components are designed with high-precision splines and geometric dimensions, and are completely interchangeable with mainstream twin screw extruder brands. To ensure a perfect match, it is recommended that you provide original factory drawings or send samples for precise size verification.

Q4: Why is the spline part of the threaded component I am currently using severely worn, while the outer circle has very little wear?
A: Severe wear of the spline usually indicates insufficient torque transmission capacity or insufficient axial compression force, and may also cause micro motion wear due to excessive clearance between the splines. Our threaded components use precision ground splines with a tolerance controlled within 0.01mm, and use high core toughness materials to effectively resist torsional fatigue and micro motion wear, extending the life of the splines.

Q5: Can we provide threaded components for laboratory small plastic pellet extruders (such as Ø 20mm, Ø 25mm)?
A: Absolutely possible. We provide small threaded components with Ø 16mm and above specifications, suitable for research and development as well as pilot production lines. These components are consistent in accuracy and materials with large-scale production equipment, ensuring accurate connection of process data from small-scale testing to large-scale plastic granulation production.