[article]
| Titre : |
Factors determining the flow erosion/part deformation of film insert molded thermoplastic products |
| Type de document : |
texte imprimé |
| Auteurs : |
Demei Lee, Auteur ; Yu-Kai Lin, Auteur ; Siang-Chen Hsu, Auteur ; Ya-Ling Tang, Auteur ; Shih-Jung Liu, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 442-451 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse numérique
Déformations (mécanique)
Erosion par écoulement
Matières plastiques -- Moulage par insertion de film
Polyéthylène téréphtalate
Polystyrène
Simulation par ordinateur
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Flow erosion and part deformation are unsolved molding problems that restrict the overall success of film insert molding. This work investigated, both experimentally and numerically, the factors that affect flow erosion and part deformation in film inset molded products. Three plate-with-thickness-variation geometries, namely flat, thin-to-thick, and thick-to thin, were molded for the products. Polystyrene films and polyethylene terephthalate (PET) resins were employed in the experiments. It was found that the thin-to-thick specimens exhibited the most severe flow erosion. Increasing the injection pressure or melt temperature worsened flow erosion. Meanwhile, for the processing parameters adopted in the experiments, part deformation generally increased with melt temperature and hold time, while it decreased with injection pressure and hold pressure. Additionally, a numerical software (Moldex® 3-D) was employed to simulate the temperature and shear stress distributions in molded products. The calculated results suggested that part deformation in insert molded products results mainly from the non-uniform temperature profile during the cooling stage, owing to the product configuration and the insert film, while flow erosion is induced by the high shear stress of the polymer melt in the filling stage. |
| Note de contenu : |
- Experimental procedure
- Numerical calculation
- Results and discussion : Influence of processing parameters on flow erosion - Effects of processing variables on molded part deformation
- Table 1 : The processing variables, as well as the values used in the experiments |
| En ligne : |
https://drive.google.com/file/d/1OanuEjBV6fxzkXp4Yv1obDO1veeEeDQE/view?usp=shari [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37919 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 4 (2022) . - p. 442-451
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