More is less / Cristoph Hinse in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 4 (2020)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 4 (2020) . - p. 31-35 Titre : More is less : Simulation as a tool for weighing process options before producing optical components Type de document : texte imprimé Auteurs : Cristoph Hinse, Auteur ; Nuno Ribeiro Simões, Auteur Année de publication : 2020 Article en page(s) : p. 31-35 Langues : Anglais (eng) Catégories : Lentilles (optique) Matières plastiques -- Moulage par injection Moulage par injection-compression Simulation par ordinateur Structures multicouches Index. décimale : 668.4 Plastiques, vinyles Résumé : Making the production of optical lenses economical while maintaining a certain level of product quality poses a huge challenge. Aside from the need to modify the geometry of the molded part, there is often a debate about the right production strategy. Injection-compression molding may offer an alternative to injection molding in terms of quality, but it is also cost-intensive. This is where simulation can serve as a decision-making aid. Note de contenu : - Injection molding or injection-compression molding ? - Simulation insights and differences - Multi-layer injection molding shortens cycle time - Simulation model and simulation sequence for a biconvex lens - Comparison of simuulation results - Figure : Simulated production of a two-layer, aspherical, biconvex lens. Here, mold filling is superimposed with the fringed pattern of the final lens - Fig. 1 : Two-layer injection molding : visualization of the simulation model for the first and second component, including mold and temperature control - Fig. 2 : The filling study shows the high level of agreement between injection molding reality and simulation - Fig. 3 : The pronounced pressure gradient that occurs during injection molding contrasts with the homogeneous pressure distribution arising in injection-compression molding - Fig. 4 : Flow-induced residual stress in the XX direction is more pronounced in injection molding than in injection-compression molding - Fig. 5 : Flow-induced and thermally induced fringed patterns and the superposition of both effects for the simulated lens using injection molding as an example En ligne : https://drive.google.com/file/d/13sZLvpuzsq8WKv-J4e5Pyxj9lO06Mk8J/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34268 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21700	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Power lies in the water / Cristoph Hinse in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 5 (05/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 5 (05/2018) . - p. 26-29 Titre : Power lies in the water : Fluid-assisted injection molding and its simulation : the combination for improved efficiency Type de document : texte imprimé Auteurs : Cristoph Hinse, Auteur ; Nuno Ribeiro Simões, Auteur ; Stefan Hofmann, Auteur ; Christian Hopmann, Auteur ; Matthias Theunissen, Auteur Année de publication : 2018 Article en page(s) : p. 26-29 Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection assisté par gaz Matières plastiques -- Moulage par injection assistée par eau Matières plastiques -- Refroidissement Simulation par ordinateur Température -- Contrôle Index. décimale : 668.4 Plastiques, vinyles Résumé : Short product lifecycles and high demands on injection molded parts require efficient product development methods. Besides new process management strategies, simulation is an important component at an early stage of product and mold development. This article validates the simulation of the water-assisted injection molding technique, compares two fluid-assisted injection molding techniques (FAIM) and presents a typical practical application. Note de contenu : - Residual wall thickness as quality feature - Validation of the simulation with a comparison of the cooling efficiency of WAIM vs GAIM - Practical decision-making aid : which process is suitable ? - Simulating the grip for the thermomix - Fig. 1 : Simulation of the media line with water bubble and distribution of the measurement positions and measurement points of the residual wall thicknesses over the cross-section - Fig. 2 : Comparison between reality and simulation with the aid of the redidual wall thicknesses (T, L, B, R), eccentricity (E) and the area ratio of the displaced molten core (A) for MP2 and MP 3, indicating the 3δ range - Fig. 3 : Numerical comparison of the cooling efficiency of WAIM and GAIM indicating the sensor position on the media line for the measurement - Fig. 4 : Because of its digital capabilities, the Thermomix has become known as the 'iPhone from Wuppertal" - Fig. 5 : Movable moldhalf (AS), stationary mold half (DS) with slide elements show open - Fig. 6 : Overview of the simulation model with temperature-control system, cold runner, cavity and overspill cavity. Simulating the grip for the mixing bowl of the Thermomix, showing the water bubble in the part overspill cavity En ligne : https://drive.google.com/file/d/1AESrj4NnIvwaScDcPOFwCkj1OUSJhMOa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30598 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
19890	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)