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Titre : Direct packaging of components : Thermoset injection molding of packages for electronic devices Type de document : texte imprimé Auteurs : Torsten Maenz, Auteur ; Martin Giersbeck, Auteur ; Gerrit Hülder, Auteur ; Armin Kech, Auteur Année de publication : 2021 Article en page(s) : p. 12-16 Langues : Anglais (eng) Catégories : Emballages en matières plastiques
Equipements électroniques ou électriques (EEE)
Matières plastiques -- Moulage par injection
Matières plastiques -- Surmoulage
ThermodurcissablesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Thermosets are being increasingly used for packaging electronic devices, and offer good properties for this application. Direct overmolding of the components is particularly interesting here. However, achieving a successful product requires striking a balance between processability, thermal conductivity and reproducibility. Note de contenu : - More gentle processing compared to thermoplastics
- Special features of the filling behavior
- Power loss and thermal conductivity not proportional
- Failures with to high cavity pressure
- Differences between simulation and reality
- Figure : In direct packaging, the electronic devices or components are directly overmolded with the molding compound
- Fig. 1 : Thermal conductivity depending on the flow direction for different sheet thicknesses: with increasing sheet thickness, the thermal conductivity decreases in the x-direction and increases in the z-direction
- Fig. 2 : Thermal conductivity (left) and power consumption (right; with/without convection) for 2 mm thick sheets of different thermoset molding compounds: the thermal conductivity and power consumption of the materials increase disproportionately to one another
- Fig. 3 : Comparison of the cavity pressures for materials with lower (left) and higher (right) viscosity: at lower viscosity, the cavity pressure is significantly lower
- Fig. 4 : Fault patterns in SMD and THT electrolytic capacitors: higher cavity pressures can lead to damage of the devices
- Fig. 5 : High-viscosity materials may result in displacement of the capacitor and consequent damage during filling (PCB = printed circuit board)
- Fig. 6 : The comparison of real and simulated process pressures during thermoset injection molding discloses significant deviations in the simulationEn ligne : https://drive.google.com/file/d/1HGeP_mx9l8Mddx3yVgu1GHNWIUCkRkeN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36171
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 6 (2021) . - p. 12-16[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22867 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Double-layer operation : Optimized overmolding process ensures low unit costs for milk packaging Type de document : texte imprimé Auteurs : Michael Birchler, Auteur Année de publication : 2017 Article en page(s) : p. 17-19 Langues : Anglais (eng) Catégories : Bouteilles en matières plastiques
Matières plastiques -- Moulage par injection
Polyéthylène téréphtalate
Production
Production en série
Structures multicouchesIndex. décimale : 668.4 Plastiques, vinyles Résumé : The Swiss injection molding machine manufacturer Netstal will produce double-layer barrier preforms for milk bottles and their 38 mm closures with tamper-evident bands at the Drinktec trade fair. As with all mass-produced products, cost-effectiveness was also paramount when designing the milk bottle and its closure, alongside maintaining food safety. This is further enhanced via a control circuit link between the injection molding machine and the Intravis CapWatcher III visual inspection system. Note de contenu : - Flexible production system for single and double-layer preforms
- PET as a cheaper, more sustainable alternative to HDPE bottles
- The fitting closure for PET milk bottles
- Control circuit link opens up new possibilities
- FIGURES : 1. Prelactia preform (cross-section) : the gray interior layer produces the barrier effect - PET-line 2C : the secondary injection unit, with which the gray interior wall is injected, is positioned in an L position toward the main injection unit - 3. Prelactia mold : the dark component is put down first and covered by injecting the white exterior layer - A 32-cavity mold can produce approximately 29000 single piece closures per hour - each with a diameter of 38 mm and part weights of 2.8gEn ligne : https://drive.google.com/file/d/12MRJv8hzl8sgcssvC8PJRVDR6RGCKUJN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29018
in KUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 8 (08/2017) . - p. 17-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19181 - Périodique Bibliothèque principale Documentaires Disponible Double sided gating with needle valve / Eveline Geppert in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 11 (11/2013)
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Titre : Double sided gating with needle valve Type de document : texte imprimé Auteurs : Eveline Geppert, Auteur ; Swen Spuller, Auteur Année de publication : 2013 Article en page(s) : p. 42-44 Langues : Anglais (eng) Catégories : Matériel médical
Matières plastiques -- Moulage par injection
Moules d'injection
Outillage
Polymères en médecine
SeringuesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Glass substitute - A new hot runner system was recently developed for the production of prefillable disposable syringes of COC, with its core component being a sidegate needle valve nozzle that was tailored to comply with these plastics’ high viscosity and temperature sensitivity. It provides for safe processing and high gating quality, which is critical with pharmaceutical packagings. The modular design of the mold enables production of different syringe models in a variety of sizes and with various tips. Note de contenu : - Prefillable disposable syringes - A difficult subject
- Layout for stressfree material processing
- Two gating points and a safe demolding mechanism
- Flexible mold solution for up to 64 cavitiesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20220
in KUNSTSTOFFE INTERNATIONAL > Vol. 103, N° 11 (11/2013) . - p. 42-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15764 - Périodique Bibliothèque principale Documentaires Disponible Dynamic injection - Made easy / Hannes Bernhard in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 4 (04/2019)
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Titre : Dynamic injection - Made easy : Improved setpoint calculation of the injection speed profile Type de document : texte imprimé Auteurs : Hannes Bernhard, Auteur ; Gerhard Dimmler, Auteur ; Josef Giessauf, Auteur ; Markus Wahlmüller, Auteur Année de publication : 2019 Article en page(s) : p. 23-25 Langues : Anglais (eng) Catégories : Machines électriques
Matières plastiques -- Moulage par injection
Presses à injecterIndex. décimale : 668.4 Plastiques, vinyles Résumé : Injection is the process step in injection molding that is most quality critical. The injection speed profile and its reproducibility have a direct influence on the internal and external properties of a part. The adjustment of the injection step is therefore of particular importance. Engel injection-molding machines with electrical injection units now feature optimized setpoint computation of this profile, with clear visualization, which increases the process transparency and ease of operation. Note de contenu : - Smooth or dynamic ?
- Expected speed profile before the first cycle
- Input merges with the output
- Fig. : With immediate effect, Engel is equipping all injection-molding machines with electrical injection units with an optimized setpiont computation for the injection speed profile
- Fig. 1 : The precalculated speed profile (broken line) shows the expected speed profile based on the setpoint values. By changing the profile dynamics, the movement can be made more gentle or more dynamic. The effect is visible directly during the movement of the slider
- Fig. 2 : The graphic display in the CC300 shows all th eimportant information at a glance. The injection profile is displayed from right to left, corresponding to the direction of movement of the screw. The green lines represent the speed curves and the red line, the pressure curve
- Fig. 3 : The red area stands for the pressure control. It illustrates the holding pressure phase and possible intervention by the pressure limit controllerEn ligne : https://drive.google.com/file/d/1xnDJgkhJXWDpowzxp66_sRKngzs46VTG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32449
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 4 (04/2019) . - p. 23-25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20880 - Périodique Bibliothèque principale Documentaires Disponible Ecologically sustainable construction with plastics / F. Stephan Auch in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 8 (2022)
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Titre : Ecologically sustainable construction with plastics : Less CO2 in construction : plastic displacers replace concrete Type de document : texte imprimé Auteurs : F. Stephan Auch, Auteur Année de publication : 2022 Article en page(s) : p. 102-104 Langues : Anglais (eng) Catégories : Construction -- Matériaux
Gaz à effet de serre -- Réduction
Matériaux -- Allègement
Matières plastiques -- Moulage par injection
Polypropylène
Produits et matériaux recyclésIndex. décimale : 668.4 Plastiques, vinyles Résumé : Construction has a considerable impact on the climate: the UN Intergovernmental Panel on Climate Change estimates that cement production generates three billion tons of CO2 every year. Ecological building materials and decarbonization of concrete production only provide either partial or long-term relief. One promising alternative is the use of plastic: GS Kunststofftechnik produces hollow bodies made of recycled polypropylene in an injection molding process for Unidome Deutschland GmbH, which replace up to 40 percent of concrete in building ceilings. Note de contenu : - Hollow plastic bodies save a lot of CO2
- The displacers make construction lighter, more stable and cheaper
- Quality fluctuations of recycled material under controlEn ligne : https://drive.google.com/file/d/1YqhiF94NBcRnyvBoHjxqmDQzihEXljVU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38692
in KUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 8 (2022) . - p. 102-104[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23635 - Périodique Bibliothèque principale Documentaires Disponible Ecoulement anisotherme d'un polymère fondu dans une buse d'injection / L. Barré in LES CAHIERS DE RHEOLOGIE, Vol. XVII, N° 1 (10/2000)
PermalinkEffect of feeding strategy on the mechanical properties of PP/recycled EPDM/PP-G-MA blends / P. Mahallati in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 2 (05/2014)
PermalinkEffect of molding history on molecular orientation relaxation during physical aging of polystyrene injection moldings / Kousaku Tao in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)
PermalinkEffect of the hot runner on the mold cooling / Marco Thornagel in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 12 (12/2012)
PermalinkEffect of vetiver grass fiber on soil burial degradation of natural rubber and polylactic acid composites / P. Juntuek in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 3 (07/2014)
PermalinkEffects of blending poly(lactic acid) and thermoplastic polyester polyurethanes on the mechanical and adhesive properties in two-component injection molding / Marco Klute in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 5 (2022)
PermalinkEffects of injection molding holding pressure on the replication of surface microfeatures / T. R. Tofteberg in INTERNATIONAL POLYMER PROCESSING, Vol. XXV, N° 3 (07/2010)
PermalinkPermalinkEfficient production of thick-walled parts / Christian Maier in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 9 (09/2013)
PermalinkEfficient side gating / Peter Braun in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 9 (09/2013)
PermalinkElectricité-électronique : Bayer fait la chasse au coût / E. Erlenkämper in CAOUTCHOUCS & PLASTIQUES, N° 757 (03/1997)
PermalinkPermalinkL'électronique pour apporter davantage d'intelligence aux pièces plastiques 3D / Lionel Tenchine in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 934 (11/2016)
PermalinkEliminating weld-seam weakness / Dietmar Drummer in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 8 (08/2016)
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