| Titre : |
Everything keeps flowing : Structured surfaces in injection molds allow for longer flow paths |
| Type de document : |
texte imprimé |
| Auteurs : |
Christian Hopmann, Auteur ; Magnus Orth, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 32-35 |
| Langues : |
Anglais (eng) |
| Catégories : |
Etat fondu (matériaux)
Matières plastiques -- Moulage par injection
Microstructures
Moules d'injection
Surfaces (Physique)
Surfaces (technologie)
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The filling of injection molds with plastic melt depends, among other things, on the surface quality of the mold cavity. An application-oriented structuring of the cavity surface increases the length of the flow path of the melt by up to 18 %, depending on the plastic material. This opens up the possibility of achieving longer flow paths with existing injection molding technology. |
| Note de contenu : |
- Microstructured mold surfaces
- Longer melt flow with structuring and heat
- Insulation effect of entrapped air
- High structural density permits longer flow
- Picture : Plastic melt continues to flow with microstructures in the mold
- Fig. 1 : Cavity with flow meander geometry. the total flow path length is 921 mm
- Fig. 2 : Arrangement of the conical microstructure. These are machined by laser ablatio
- Fig. 3 : The effects and interactions of the investigated parameters show a relevant influence on the flow path length
- Fig. 4 : The influence of the mold structuring on the achievable flow path length is clearly visible, especially with easy-flowing material
- Fig. 5 : Model presentation : the microstructure reduces heat dissipation
- Fig. 6 : At the flow front the structures are not filled
- Fig. 7 : The structure density has a decisive influence on the flow path length of the melt
- Table 1 : Parameters examined and their levels. The temperatures indicated are measured with contact thermometers on the cavity surface and in the melt and are not the values set on the temperature control unit or on the machine control
- Table 2 : Structural specifications of the four cavity inserts used |
| En ligne : |
https://drive.google.com/file/d/1xpxf11UnhYhs9v7twzW-RflQfi6AmUHU/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32552 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 5 (05/2019) . - p. 32-35
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