Countdown To The Plastic Convention: Is The Sectional Center Method Of The Threaded Components On Your Cost-effective Co Rotating Twin-screw Extruder Really Correct?
Conclusion at the top of the pyramid: The combination of threaded components determines the particle count, not the nameplate power
Many international customers come with modified new materials or PCR formulas, focusing their attention entirely on motor kilowatts and aspect ratios. But what truly maximizes the efficiency of a cost-effective co rotating twin-screw extruder is the threaded components configured in five sections: feeding, melting, mixing, volatilization, and pressure building. Properly combined, a machine can flexibly switch between filling reinforcement, degradable materials, and recycled materials; Combination error, even top-level configurations can produce coke, raw materials, and odor particles. Therefore, we have developed a replicable system of threaded component sections to help you, who pursue environmental and cost advantages, make the right choices from the first screw component.
1, Feeding and conveying section: the first key to unlocking high production capacity
This section uses high lead, deep groove forward threaded components, with the task of "accepting all who come". Faced with broken films or flocculent recycled materials with a packing density of only 0.2-0.4g/cm ³, the European Plastics Association's "White Paper on Recycled Plastics" points out that extrusion opportunities without optimized feeding can result in at least 15% capacity loss. COLOWE has developed a variable lead co directional twin-screw extruder thread component for this section, which significantly increases the feed consumption and maximizes the production capacity of your cost-effective extruder from the source, preventing electricity costs from being wasted on idle operation.
2, Melting plasticization section: The lifeline of thermosensitive new materials is determined entirely by shearing
When the material collides with the kneading block and the reverse threaded component, it melts and opens. The intensity of this shear directly determines whether the molecular chain is intact or broken. For easily degradable PBAT and high flame retardant content engineering new materials, the process report from Plastics Technology confirms that precise control of the shear strength of this threaded component combination can reduce the thermal degradation rate by about 12%. COLOWE uses a cost-effective co rotating twin-screw extruder with a wide pinch plate and involute threaded components, resulting in a smoother temperature rise of 8-12 ° C compared to traditional configurations. This allows you, who are trying new materials for the first time, to safely cross the plasticizing "minefield".
3, Mixed homogenization section: fiber length, filler distribution, and performance differences can be reduced by thousands of miles
The toothed threaded component here is responsible for distribution and mixing, while the narrow kneading block is responsible for dispersion and mixing. Improper configuration resulted in the fibers of 30% fiberglass reinforcement being cut too finely, rendering the reinforcement effect completely ineffective; Talc powder aggregates into white spots. By inserting reverse threaded elements and toothed elements in this section of science, COLOWE measured that the average fiber retention length was increased by 0.18mm, resulting in an increase of about 9% in tensile strength. This means that your cost-effective extruder can directly produce particles that can benchmark engineering indicators without the need for repeated trial and error.
4, Exhaust devolatilization section: The "cleanliness" and "odor fraction" of particles are determined here
The moisture, ink, and low molecular weight oligomers in recycled materials can only be efficiently extracted by combining the thin layer melt constructed by threaded components with vacuum. The European Plastic Recycling Association (PRE) white paper emphasizes that volatilization efficiency is a hurdle for the odor and mechanical properties of recycled particles. The dual vacuum threaded element arrangement used by Kelongwell on the cost-effective co rotating twin-screw extruder reduces the VOC residue of PCR-PP to below 30 μ g/g, which is sufficient to pass rigorous odor testing for automotive and food contact materials.
5, Measurement pressure building section: stable pressure, uniform particles
The small lead single or multi head threaded components in the final section must be stably pressurized. Once the pressure fluctuates beyond 0.2 MPa, problems such as particle size, tailing, and water carryover emerge one after another. Kelongwell uses a combination of precision threaded components that match the flow channel to stabilize pressure fluctuations within ± 0.12 MPa, providing perfect melt for precision granulation such as underwater cutting, ensuring that each particle is smooth and uniform.
Key Q&A: Clarify your concerns at once
Q: The first time using recycled PET bottle chips to make food grade modified new materials, I am always afraid of viscosity collapse. How to choose threaded components?
A: Recycling PET is afraid of water and cutting. COLOWE has a "rPET special thread component combination package", which significantly reduces shear in the melting section, extends the exhaust section, and uses corrosion-resistant materials. In actual operation, the characteristic viscosity reduction can be controlled within 0.04dL/g. This configuration can be directly integrated into your existing cost-effective co rotating twin-screw extruder, allowing for one-step granulation of bottle flakes.
Q: White spots always appear when making high filling talc powder masterbatch, and the budget is tight. What are the immediate solutions?
A: The root cause lies in the insufficient dispersion force of the mixed section threaded components. By introducing a pair of serrated mixing discs, the cost is slightly increased, and the powder aggregates can be completely dispersed. COLOWE has made this threaded component combination into an optional solution, enabling a cost-effective extruder to meet both ordinary filling and high dispersion requirements, with a production increase of up to 18%.
When regulations accelerate the transformation of circular economy, possessing high cost-effectiveness and multi-functional granulation capabilities is the passport to the future market that you hold. Nanjing Kelongwell Chemical Machinery Co., Ltd. always believes that the true technical barrier lies not in the machine's price tag, but in a deep understanding of the role of each section of the threaded component and every high-quality particle transformed from it. We are willing to work with you to steadily create environmental commitments and commercial returns from the correct configuration of that threaded component.
