| Titre : |
Variothermal temperature control from the compressed air network : Varioplast has developed a dynamic temperature control process which can be retrofitted to injection molds without theneed for any modifications |
| Type de document : |
texte imprimé |
| Auteurs : |
Edwin Neugebauer, Auteur ; Michael Däbritz, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 13-16 |
| Langues : |
Anglais (eng) |
| Catégories : |
Matières plastiques -- Moulage par injection -- Appareils et matériel
Température -- Contrôle
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
As a manufacturer of both coated and uncoated high-gloss plastic parts, Varioplast has continually been faced with the problem of visible knit and flow lines on molded parts. Conventional variothermal processes, for reasons of overall economics, are limited in their suitability to offset existing and future cost pressures exerted by customers. Varioplast unveiled a new process at Fakuma 2017. |
| Note de contenu : |
- The idea : hot air from the nozzle
- The heating module : designed for single and double-sided use
- Process parameters : a system with scalable performance
- Test results : production readiness confirmed
- FIGURES : 1. In series production, the finished part is removed on the ejector side, while the cavity is heated in parallel on the nozzle side. The 3D-printed metallic heating head module permits quick adaptation to customer-specific geometries in the mold - 2. The turbotherm modules can be used on the nozzle and ejector side if required - 3. Surface on a molded part with and without turbotherm. A knit line is invisible in the first case, but visible in the second - 4. Representation of the surface temperature of the cavity in the machine cycle. A temperature rise from 5 to 10°C/s is possible, with the exact rate depending on the surface roughness - 5. Representation of the heating power in the machine cycle. The unit requires an average of approx. 1.4 kW power. Variothermal process control via the complete mold plates requires 20 to 30 times as much power - 6. The width of the knit line decreases strongly with heating time. It can be optically reduced by up to 100%, i.e. completely eliminated |
| En ligne : |
https://drive.google.com/file/d/1gxBOXdonL9DepHK1iwwPjPouwMUpjV6T/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30083 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 1-2 (01-02/2018) . - p. 13-16
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Variothermal temperature control from the compressed air network in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 1-2 (01-02/2018)
