| Titre : |
The new process for lightweight foaming : Granulate is impregnated with COâ‚‚ in an autoclave and processed on standard injection molding machines |
| Type de document : |
texte imprimé |
| Auteurs : |
Szych, Pawel, Auteur ; Kürten, Andreas, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 46-50 |
| Langues : |
Anglais (eng) |
| Catégories : |
Autoclave (technologie)
Matériaux -- Allègement
Moussage (chimie)
Mousses plastiques -- Moulage par injection
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The e-mobility trend is driving increased efforts in lightweight construction. Now the Kunststoff-Institut Lüdenscheid and Linde AG have developed a new physical foaming process that does not require costly retrofitting or conversion of the injection molding machine. This flexibility makes the process equally attractive for small batches and large production lots. Appealing component surfaces can be designed in combination with the gas counter-pressure process. |
| Note de contenu : |
- Improved dimensional accuracy through foaming
- Chemical vs. physical foaming
- A simple new physical foaming process
- Improving the component surface with gas counter-pressure
- FIGURES : 1. Sequence of the new foaming process : in contrast to other phycal foaming processes, the granulate is impregnated with the blowing agent prior to treatment in the machine - 2. Weight increase of 100g plastic, respectively with two different impregnating times ; the pressure increase has a clear effect - 3. Continuous weight measurement on foamed components made of various plastics. Each point corresponds to a component; reproducible use of the impregnated granulate is confirmed over several hours - 4. Gas supply for material impregnation. Multiple injection molding machines can be supplied by one autoclave - 5. When gas bubbles come to the surface, this causes streaks to form (top). The gas counter-pressure process (bottom) prevents gas bubbles from bursting at the melt front - 6. The pressure control module (Linde) has to respond quickly and keep the counter-pressure constant to the end of the flow path by relasing gas as the malt flows in
- TABLE : Degree of foaming achieved for different plastic materials fluctuates between nearly 10% to a maximum (PC) of 60% |
| En ligne : |
https://drive.google.com/file/d/1XIId984Y-Rbfp5eRALBsHlXvCkGvViBZ/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29108 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 9 (09/2017) . - p. 46-50
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