---
_id: '59243'
abstract:
- lang: eng
  text: Most single-screw extruders used in the plastics processing industry are plasticizing
    extruders, designed to melt solid pellets or powders within the screw channel
    during processing. In many cases, the efficiency of the melting process acts as
    the primary throughput-limiting factor. If the material melts too late in the
    process, it may not be sufficiently mixed, resulting in substandard product quality.
    Accurate prediction of the melting process is therefore essential for efficient
    and cost-effective machine design. A practical method for engineers is the modeling
    of the melting process using mathematical–physical models that can be solved without
    complex numerical methods. These models enable rapid calculations while still
    providing sufficient predictive accuracy. This study revisits the modified Tadmor
    model by Potente, which describes the melting process and predicts the delay-zone
    length, extending from the hopper front edge to the point of melt pool formation.
    Based on extensive experimental investigations, this model is adapted by redefining
    the flow temperatures at the phase boundary and accounting for surface porosity
    at the beginning of the melting zone. Additionally, the effect of variable solid
    bed dynamics on model accuracy is examined. Significant model improvements were
    achieved by accounting for reduced heat flow into the solid bed due to the porous
    surface structure in the solid conveying zone, along with a new assumption for
    the flow temperature at the phase boundary between the solid bed and melt film.
author:
- first_name: Volker
  full_name: Schöppner, Volker
  id: '20530'
  last_name: Schöppner
- first_name: Florian
  full_name: Brüning, Florian
  id: '72920'
  last_name: Brüning
- first_name: Felix
  full_name: Knaup, Felix
  id: '45124'
  last_name: Knaup
citation:
  ama: Schöppner V, Brüning F, Knaup F. Improvement in an Analytical Approach for
    Modeling the Melting Process in Single-Screw Extruders. <i>Polymers</i>. 2024;16(22):3130.
    doi:<a href="https://doi.org/10.3390/polym16223130">10.3390/polym16223130</a>
  apa: Schöppner, V., Brüning, F., &#38; Knaup, F. (2024). Improvement in an Analytical
    Approach for Modeling the Melting Process in Single-Screw Extruders. <i>Polymers</i>,
    <i>16</i>(22), 3130. <a href="https://doi.org/10.3390/polym16223130">https://doi.org/10.3390/polym16223130</a>
  bibtex: '@article{Schöppner_Brüning_Knaup_2024, title={Improvement in an Analytical
    Approach for Modeling the Melting Process in Single-Screw Extruders}, volume={16},
    DOI={<a href="https://doi.org/10.3390/polym16223130">10.3390/polym16223130</a>},
    number={22}, journal={Polymers}, author={Schöppner, Volker and Brüning, Florian
    and Knaup, Felix}, year={2024}, pages={3130} }'
  chicago: 'Schöppner, Volker, Florian Brüning, and Felix Knaup. “Improvement in an
    Analytical Approach for Modeling the Melting Process in Single-Screw Extruders.”
    <i>Polymers</i> 16, no. 22 (2024): 3130. <a href="https://doi.org/10.3390/polym16223130">https://doi.org/10.3390/polym16223130</a>.'
  ieee: 'V. Schöppner, F. Brüning, and F. Knaup, “Improvement in an Analytical Approach
    for Modeling the Melting Process in Single-Screw Extruders,” <i>Polymers</i>,
    vol. 16, no. 22, p. 3130, 2024, doi: <a href="https://doi.org/10.3390/polym16223130">10.3390/polym16223130</a>.'
  mla: Schöppner, Volker, et al. “Improvement in an Analytical Approach for Modeling
    the Melting Process in Single-Screw Extruders.” <i>Polymers</i>, vol. 16, no.
    22, 2024, p. 3130, doi:<a href="https://doi.org/10.3390/polym16223130">10.3390/polym16223130</a>.
  short: V. Schöppner, F. Brüning, F. Knaup, Polymers 16 (2024) 3130.
date_created: 2025-04-02T09:51:32Z
date_updated: 2025-04-02T11:21:00Z
department:
- _id: '9'
- _id: '321'
- _id: '367'
doi: 10.3390/polym16223130
intvolume: '        16'
issue: '22'
keyword:
- delay zone
- extrusion
- melting modeling
language:
- iso: eng
page: '3130'
publication: Polymers
quality_controlled: '1'
status: public
title: Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw
  Extruders
type: journal_article
user_id: '59363'
volume: 16
year: '2024'
...