| Titre : |
Flexible guiding systems for cooling air : Increase in mass throughput and improved mechanical product properties |
| Type de document : |
texte imprimé |
| Auteurs : |
Lars Kraus, Auteur ; Christian Hopmann, Auteur ; Martin Facklam, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 32-36 |
| Langues : |
Anglais (eng) |
| Catégories : |
Films plastiques
Matières plastiques -- Extrusion
Matières plastiques -- Moulage par extrusion-soufflage
Matières plastiques -- Refroidissement
Systèmes de guidage
Systèmes de refroidissement
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
In order to avoid bubble ruptures during the production of blown film, the velocity of the cooling air is often ‧reduced, which has a negative effect on the plant efficiency. The use of air guiding systems (AGS) can prevent such bubble instability. A novel air guidance system was developed at IKV in Aachen, Germany, using iris diaphragms in order to increase the cooling efficiency of blown film extrusion and thus improve the productivity of an existing plant. |
| Note de contenu : |
- Principles and challenges of blown film cooling
- Development of a flexible air guiding system
- Plant engineering and design of experiments
- Mass throughput and film thickness variation
- Mechanical properties
- Figure : Flexible air guiding system in blown film allows higher mass throughputs and greater process stability
- Fig. 1 : Venturi effect within an air guiding system (AGS)
- Fig. 2 : Schematic diagram and process-integrated AGS in blown film extrusion
- Fig. 3 : The use of the AGS developed at IKV leads to increased mass throughputs compared to the conventional process (left average values, right process points, see text)
- Fig. 4 : With the AGS the film thickness variations are higher compared to the conventional process
- Fig. 5 : Breaking stresses: On average, the values increase with the use of an AGS; in the case of LDPE (right), for example, there is an increase of approx. 5 MPa
- Fig. 6 : Compared to the conventional process, the use of the AGS leads to an early expansion of the film bubble
- Fig. 7 : Compared to the conventional process, the use of the AGS leads to decreasing elongation at break
- Fig. 8 : Compared to the conventional process, the use of the AGS leads to increased shrinkage properties
- Table 1 : Full factorial design of experiment |
| En ligne : |
https://drive.google.com/file/d/1sjZQUSuF3LOaP6NbNDJG4NdCIeWCpAp9/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34815 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 7 (2020) . - p. 32-36
Aller sur edunet
Accueil
Flexible guiding systems for cooling air in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 7 (2020)
