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Development of Alternative Screw Concepts for Rubber Extrusion Based on Simulative and Experimental Methods
Leon Schmidt1, Volker Schöppner1
1Kunststofftechnik Paderborn, Paderborn University, 33098 Paderborn, Germany.
Polymers
|May 13, 2026
Summary
This study explores pinless screw designs as alternatives to traditional pin-type rubber extruders. These novel designs offer comparable material homogeneity and higher throughputs, improving cost-effectiveness in rubber extrusion.
Area of Science:
- Polymer Engineering
- Materials Science
- Manufacturing Processes
Background:
- Traditional pin-type rubber extruders face limitations in efficiency and design flexibility.
- Advancements in screw design offer potential for improved rubber extrusion processes.
Purpose of the Study:
- To investigate alternative screw concepts for rubber extrusion, specifically those with circumferential and axial flight offsets.
- To evaluate the suitability and performance of pinless extruder designs compared to conventional pin-type extruders.
Main Methods:
- Utilized simulative (computational modeling) and experimental methods to analyze alternative screw concepts.
- Focused on styrene-butadiene rubber (SBR) mixtures to assess simulation accuracy and material behavior.
Main Results:
- Simulations demonstrated good functionality for SBR mixtures, with noted limitations in thermal property prediction.
- Pinless designs achieved comparable material and thermal homogeneity to pin-type extruders.
- Achieved up to 10% higher throughputs with the investigated pinless designs.
Conclusions:
- Pinless screw concepts are a viable and effective alternative to pin-type extruders for rubber extrusion.
- These alternative designs enhance cost-effectiveness through increased throughput and efficient design via simulation.
- Further simulation refinement, particularly for thermal properties, is recommended.
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