| Titre : |
Keeping a sense of perspective : Optical components place high requirements on the entire process chain |
| Type de document : |
texte imprimé |
| Auteurs : |
Jochen Mitzler  , Auteur ; Martin Würtele, Auteur ; Jens Fiedler, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 43-46 |
| Langues : |
Anglais (eng) |
| Catégories : |
Automobiles -- Eclairage
Matériel optique
Matières plastiques -- Moulage par injection
Matières plastiques dans les automobiles
Moulage par injection-compression
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
It is familiar to every eyeglass wearer: Just a tiny spec on the glass ruins your vision. And there may even be a safety risk if car headlamps scatter the light in the wrong direction. The manufacture of optical parts by injection molding is therefore a serious and demanding task affecting the entire process chain. |
| Note de contenu : |
- Challenges: narrow tolerances and absolute transparency
- Strictly regulated : plastication and process
- Process in the mold : injection-compression molding is preferred
- Critical for rejects: material supply and cleanroom climate
- Central production issue : the economics of thick lenses
- Functional structures : moth's eyes and fresnel lens
- Fig. 1. Light strips, e.g. for LED headlamps are manufactured by the multilayer process
- Fig. 2. The precise scattering effect of headlamps and rear lamps requires an exactly matched process chain
- Fig. 3. For optical applications, molds with a compression function are recommended This allows longer flow paths to be realized and cavities, sink marks or birefringence effects due to internal stresses to be avoided
- Fig.4. Production under cleanroom conditions : The CH twin-platen machine is optionally equipped with a special flow box via the clamping unit. The moid region therefore remains almost dust-free |
| En ligne : |
https://drive.google.com/file/d/1qvChY5N63sG2yhWg3o_yk1kEy2sK4fLp/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30263 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 3 (03/2018) . - p. 43-46
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Keeping a sense of perspective in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 3 (03/2018)
