Efficient production of thick-walled parts / Christian Maier in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 9 (09/2013)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 103, N° 9 (09/2013) . - p. 87-91 Titre : Efficient production of thick-walled parts Type de document : texte imprimé Auteurs : Christian Maier, Auteur ; Josef Giessauf, Auteur ; Georg Steinbichler, Auteur Année de publication : 2013 Article en page(s) : p. 87-91 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Eclairage Couches minces multicouches Diodes électroluminescentes Matières plastiques -- Moulage par injection Polycarbonates Temps de cycle (production) -- Réduction Index. décimale : 668.4 Plastiques, vinyles Résumé : Thick-walled lenses. Injection molding is demonstrating its versatility again in the production of challenging optical plastic parts such as LED lenses for automotive headlights with tolerances in the micron range. A new development in multilayer injection molding allows productivity for the production of thick-walled lenses to be increased even further. Note de contenu : - What are the benefits of multilayer technology? - Shorter cycle times thanks to longer cooling times - Process sequence with external cooling - Record cycle time Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20559 [article]

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How repeatable is repeatability ? / Josef Giessauf in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 6-7 (06-07/2016)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 6-7 (06-07/2016) . - p. 43-47 Titre : How repeatable is repeatability ? : Working properly with machine capability and tolerance limits Type de document : texte imprimé Auteurs : Josef Giessauf, Auteur ; Christian Maier, Auteur Année de publication : 2016 Article en page(s) : p. 43-47 Langues : Anglais (eng) Catégories : Evaluation Matières plastiques -- Moulage par injection Production en série Système de production Index. décimale : 668.4 Plastiques, vinyles Résumé : Repeatability means the ability to produce parts that have identical properties to one another. As with other manufacturing processes, this capability is very important in injection molding because it has a crucial influence on the efficiency. It is therefore often necessary to assess production systems or their components in advance according to whether they ensure a repeatable process. But how ? Note de contenu : - Comparisons with standard deviations and variation - The pitfalls of repeatability measurement - Erroneous measurements - Suboptimum settings - Repeatability tests with process data - Relaxed handling of tolerance limits - Assistance systems for processs control En ligne : https://drive.google.com/file/d/1mlRm3_Qt542tDLMt9FNDpP2wtsa4nn8z/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26780 [article]

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Numbers that count / Josef Giessauf in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 9 (09/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 9 (09/2017) . - p. 28-32 Titre : Numbers that count : with its iQ weight monitor, engel shifts process monitoring one step up Type de document : texte imprimé Auteurs : Josef Giessauf, Auteur ; Christian Maier, Auteur ; Paul Kapeller, Auteur ; Georg Pillwein, Auteur ; Georg Steinbichler, Auteur Année de publication : 2017 Article en page(s) : p. 28-32 Langues : Anglais (eng) Catégories : Logiciels Matières plastiques -- Moulage par injection Procédés de fabrication Index. décimale : 668.4 Plastiques, vinyles Résumé : Cyclically measured process parameters are used for monitoring and optimizing injection molding processes. In the past, attention was focused on axis movements and the associated necessary forces and times. Now, the software package iQ weight monitor goes a large step further. It generates process parameters that are relevant for component quality: injected volume, melt viscosity variation, and pressure deviations during injection. Note de contenu : - Focus on filling procedure - Classics under scrutiny - Process parameters with significance - Reduced outlay, large benefits - Process monitoring with control possibilities - FIGURES : 1. In spite of their limited significance, melt cushion and flow number were frequently used in the past for process monitoring - 2. Changes of injection volume, viscosity, and the pressure curve can influence component quality. In the worst case, as shown here, various interference factors occur together. For better understanding, very large deviations from the reference curve have been selected here - 3. the respective actual process parameters are shown clearly on the display of the machine control system. The traffic light colors indicate which values are within or outside the tolerance range - TABLES : 1. Intentional manipulations of the process and their influence on component weitght and also on the two process parameters melt cushion and flow number. The colors indicate the significance of the process parameters. Green : The process parameters has changed in the expected direction. Red : The process parameter has changed contrary to the expectation - 2. Intentionally introduced process changes and their influences on component weight : The process parameters injection volume and viscosity change in the respective expected directions. The changes of injection volume are greater than for component weight, as the sprue was not taken into account in the latter - 3. The iQ weight monitor provideshighly significant process parameters En ligne : https://drive.google.com/file/d/149hRD4HTZS3LPrs3CwmZdpOTSJ-XPWpm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29099 [article]

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