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Titre : Cooling with heat pipes : Reduced energy consumption and shorter cycle times due to structurally integrated heat pipe mold cores Type de document : texte imprimé Auteurs : Kartelmeyer, Stephan, Auteur ; Hüttemann, Max-Vincent, Auteur ; Elmar Moritzer, Auteur ; Christoph Jaroschek, Auteur Année de publication : 2021 Article en page(s) : p. 32-35 Langues : Anglais (eng) Catégories : Caloducs Caloduc, du latin calor "chaleur" et de ductus "conduite", désigne des éléments conducteurs de chaleur. Appelé heat pipe en anglais (signifiant littéralement "tuyau de chaleur"), un caloduc est destiné à transporter la chaleur grâce au principe du transfert thermique par transition de phase d'un fluide (chaleur latente).
Les caloducs sont utilisés entre autre dans les moules en plasturgie. Pour évacuer les calories d'une broche, ou d'un tiroir, un caloduc est inséré dans l'empreinte ; l'autre extrémité du caloduc est en contact avec le fluide caloporteur, ou éventuellement la carcasse du moule. Cela permet de refroidir efficacement une broche où il est impossible de faire passer un fluide caloporteur, à cause de son faible diamètre par exemple. (Wikipedia)
Economies d'énergie
Matières plastiques -- Moulage par injection
Température -- Contrôle
Temps de cycle (production) -- RéductionIndex. décimale : 668.4 Plastiques, vinyles Résumé : In the injection molding of engineering plastics, mold temperature control consumes more than one third of the total energy input. Thus, energy for mold temperature control is a continuous major cost factor, adding up to around EUR 1.1 billion industry-wide in Germany alone in 2019. A novel technology offers the opportunity to reduce this amount – and eliminate hotspots. Note de contenu : - Why is this cost-intensive amount of energy needed ?
- Conventional temperature control has disadvantages
- How can this large amount of energy be reduced ?
- The mold core becomes a hollow body with cooling effect
- Saving money and cycle time
- Fig. 1 : The temperature control units have the highest energy share in the injection molding process
- Fig. 2 : Illustration of the temperature control methods copper and water (left) compared to the system with heat pipes (right; Pl = plastic)
- Fig. 3 : Functional diagram of a heat pipe: vapor and condensate transport, phase transition areas and adiabatic zone
- Fig. 4 : Core system in longitudinal section: molded core cooling based on water and structurally integrated heat pipe core
- Fig. 5 : Illustration of the thermal imaging camera with arrangement of the measuring area for the inside of the article and view of the thermal imaging camera on the parting line
- Fig. 6 : Pure heat conduction in the mold core. Without the heat-dissipating effect the component already warped during the fifth cycle
- Table 1 : Process values of temperature controlEn ligne : https://drive.google.com/file/d/1ximcU-rsJKW6BwgOsNZwF6pyiFF5dxX0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35537
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 3 (2021) . - p. 32-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22639 - Périodique Bibliothèque principale Documentaires Disponible Correctly assessing the energy efficiency of heating systems / Roland Huber in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 9 (2020)
[article]
Titre : Correctly assessing the energy efficiency of heating systems : Indirect heating without contact between heating element and water has many advantages Type de document : texte imprimé Auteurs : Roland Huber, Auteur Année de publication : 2020 Article en page(s) : p. 32-34 Langues : Anglais (eng) Catégories : Chauffage -- Appareils et matériels
Efficacité énergétique
Matières plastiques -- Moulage par injection
Température -- ContrôleIndex. décimale : 668.4 Plastiques, vinyles Résumé : It is often claimed that temperature control units featuring heaters with no direct contact to the heat transfer medium are at a disadvantage in terms of energy efficiency. While this may seem correct at first glance, a different picture emerges when the whole system is taken into consideration. Note de contenu : - The decisive question : How much heat is lost ?
- Insulation and heat balance are key factors
- Direct heating : Effective, but more maintenance-intensive
- Indirect heating : Intelligent, energy-efficient solution found
- Figure : Installation location of the indirect heating system in Series 5 tem-perature control units
- Figure : View of HB-Therm's proprietary heating system without direct contact to the heat transfer medium. The QR code links to a video clip with more detailed informationEn ligne : https://drive.google.com/file/d/1jutidZ4Qrj77zymEiAvNiJBxw3_1qg0A/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34825
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 9 (2020) . - p. 32-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22367 - Périodique Bibliothèque principale Documentaires Disponible Cost-effective direct compounding for medium-sized components / Thomas Drogi in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 7 (2022)
[article]
Titre : Cost-effective direct compounding for medium-sized components : Efficiency meets sustainability : Systematically reduce costs and CO2 emissions Type de document : texte imprimé Auteurs : Thomas Drogi, Auteur ; Franz-Xavier Keilbach, Auteur Année de publication : 2022 Article en page(s) : p. 74-77 Langues : Anglais (eng) Catégories : Compoundage direct
Coût -- Contrôle
Economies d'énergie
Gaz à effet de serre -- Réduction
Matières plastiques -- Moulage par injection
Produits et matériaux recyclésIndex. décimale : 668.4 Plastiques, vinyles Résumé : Plastics processors are under a twofold pressure today: first, the material and energy prices are rising. Second, they have to find solutions to reduce the CO2 footprint of their production. Customers and legislators are requiring this in increasing measure. Direct compounding, which means manufacturing and processing compounds in a one-step process, opens up new potential here – now also for smaller components with a further development from KraussMaffei. Note de contenu : - Production in a single heating process conserves energy and cuts costs
- Shot weights from 50 to 2000 g
- ROI in less than one year
- The last degree of freedom still lacking
- Directly compounding recycled materials of various viscosities
- Fig. 1 : In the DCIM process, a single-screw extruder connected directly to the plasticizing unit does the compounding
- Fig. 2 : Having fewer process steps in the direct process improves the CO2 balance of the components and reduces the material costs by 0.30 to 1.00 EUR/kg
- Fig. 3 : The DCIM process allows for customized, cost-effective material mixtures. It is best suited for reinforcing polymers
En ligne : https://en.kunststoffe.de/a/specialistarticle/cost-effective-direct-compounding- [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38424
in KUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 7 (2022) . - p. 74-77[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23588 - Périodique Bibliothèque principale Documentaires Disponible Countering component distortion with perspective / Jan Bayerbach in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 9 (09/2014)
[article]
Titre : Countering component distortion with perspective : Injection molding simulation is a powerful tool for quality assurance Type de document : texte imprimé Auteurs : Jan Bayerbach, Auteur Année de publication : 2014 Article en page(s) : p. 53-57 Langues : Anglais (eng) Catégories : Assurance qualité
Matières plastiques -- Moulage par injection
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : During the manufacture of complex injection molded parts, component distortion is frequently accepted as a matter of fact. A comparison of simulated distortion results with real component distortion shows that this is not necessarily so. Studies with an electric component revealed a concordance of 90 %. Note de contenu : - Virtual start-up with multi-cycle analysis
- Two effects : Anisotropic and volumetric shrinkage
- Influence of component geometry and material stiffness
- Measures to minimize distortion
- Rib straightens the component during coolingEn ligne : https://drive.google.com/file/d/1VJC5zzi-VZlQZTydb1vCWG6rbL9pXyCK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22328
in KUNSTSTOFFE INTERNATIONAL > Vol. 104, N° 9 (09/2014) . - p. 53-57[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16514 - Périodique Bibliothèque principale Documentaires Disponible A criterion for the formation of fibrillar layers in injection molded parts / R. Pantani in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 3 (07/2018)
[article]
Titre : A criterion for the formation of fibrillar layers in injection molded parts Type de document : texte imprimé Auteurs : R. Pantani, Auteur ; Vito Speranza, Auteur ; G. Titomanlio Année de publication : 2018 Article en page(s) : p. 355-362 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection
Polypropylène
Simulation par ordinateur
Structures fibrillairesIndex. décimale : 668.4 Plastiques, vinyles Résumé : It is quite well known that the morphology of an injection molded part made by a semicrystalline polymer presents several layers. In particular spherulitic structures are found in the core region, a layer characterized by highly oriented fibrillar morphology (the shear layer) usually follows and a skin layer is often observed at the sample surface. The thickness of the fibrillar layer deeply influences the mechanical properties of the part. In this work, a criterion to predict the thickness of the fibrillar layer is proposed and verified. The criterion is essentially based on the amount of viscous work done when the molecular stretch is higher than a critical value: the molecular stretch should be above a critical value while a critical amount of viscous work is accumulated. In order to tune the parameters, and to validate the criterion, a well characterized polypropylene was chosen as test material, and four different injection molding conditions were analyzed. The criterion is verified by comparing some experimental results with the prediction of the UNISA code (an injection molding software developed at the University of Salerno), good comparison between software predictions and experimental data confirms the suitability of the criterion. Note de contenu : - INJECTION MOLDING DATA AND PROCESS SIMULATION
- INJECTION MOLDING SIMULATIONS : Definition of the molecular stretch parameter - Final distributions of stretch and work and their evolutions
- APPLICATION OF THE SIMULTANEITY CRITERIONDOI : 10.3139/217.3543 En ligne : https://www.degruyter.com/document/doi/10.3139/217.3543/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30804
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 3 (07/2018) . - p. 355-362[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20044 - Périodique Bibliothèque principale Documentaires Disponible Croire en la simulation / Jean Guilhem in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 852 (10/2007)
PermalinkCross-linked hydrophobic starch granules in blends with PLA / Johannes Fuchs in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 1 (03/2018)
PermalinkPermalinkCrystallinity-based product design : utilizing the polymorphism of isotactic PP homo- and copolymers / Markus Gahleitner in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 5 (11/2016)
PermalinkCustom-made networking increases efficiency / Reinhard Schiffers in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 10 (10/2016)
PermalinkPermalinkDecor and function on one film / Andreas von Riewel in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 5 (05/2017)
PermalinkDecoration and Function Combined / Angelo Librizzi in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 12 (12/2011)
PermalinkDécorer et injecter en une seule étape in PLASTIQUES & ELASTOMERES MAGAZINE, N° 55-1 (01-02/2003)
PermalinkDéfinir la position optimale des capteurs / David Garcia in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 913 (07-08/2014)
PermalinkLes défis du surmoulage in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 907 (11/2013)
PermalinkDevelopment of high pressure injection technology for normal hydraulic injection molding machines / M. C. Song in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 1 (03/2018)
PermalinkDevelopment of a segmented temperature control for targeted solidification in injection molding / Christian Hopmann in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 2 (05/2018)
PermalinkLes différents plastiques recyclés passés au crible / Jérôme Piejak in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 908 (12/2013)
PermalinkDigital preview of bio-based parts / Marco Neudecker in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
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