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Making a racket for plastics / Christoph Jaroschek in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 6-18 Titre : Making a racket for plastics : New ways to attain special part properties are advancing the art of injection molding Type de document : texte imprimé Auteurs : Christoph Jaroschek, Auteur Année de publication : 2018 Article en page(s) : p. 6-18 Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection Index. décimale : 668.4 Plastiques, vinyles Résumé : Making a racket is part of the trade. In the past, tradesmen would do this at markets by swinging wooden rattles to attract attention. Today, instead, it is the industry which is trying to make its developments heard and accepted, for example at trade fairs and in the media. What has injection molding technology had to offer recently, aside from Industry 4.0? The answer is process developments that in the main expand the range of applications for plastic parts, mechanical assistance systems that enable consistently high part quality to be achieved more reliably, and the huge field of temperature control. Note de contenu : - Processes for lighter plastic parts - Processes producing better mechanical properties - Alternating temperature control for particularly high finish - Flow-coated in the mold and printed with electronics - Radical thoughts in machine technology - Bringing clear application advantages - Adaptive control for maintaining constant high quality - Closed loop control with an external quality control unit - Focusing on energy consumption in the periphery - Heat pipes for faster cycles in molds with slim cores - Cooling problem zones with CO2 - Reduced cooling time by the back door - Unrivalled features - Will industry 4.0 bring good weather ? - Fig. 1 : Plant for gassing plastic pellets in an autoclave unlike other physical foaming processe, the pellet are charged with the blowing agent beforehand - Fig. 2 : Schematic sandwich construction with two back-molded fiber fabrics and penetrating rib structures. All part structures are-continuously formed from the core outward, instead of being molded onto an organic sheet - Fig. 3 : The heated fiber tapes are positioned exactly in the mold before they are overmolded with a fiber-reinforced thermoplastic and given their final shape - Fig. 4 : Multiaxial tape-laying machine : this design provides for two vacuum laying tables and up to four material feeders for a process-stable, flexible UD-tape layup - Fig. 5 : Plant parts for inductively heated molds. With the complete system, theuser can comfortably control different temperature zones - Fig. 6 : All four parts of the A-pillar linings are molded in the insert mold and flow-coated in the paintcavity after the mold has been turned-in a single-stage process which does not require solvent or release agent - Fig. 7 : Mold half for thermoforming and texturing TPO film. the embossing process begins during heating by drawing the film (shown here in black) under vacuum into the IMG mold - Fig. 8 : Back-molded film panel with decoration and printed capacitive keys. The function symbols are highlighted in black glaze, so that the keys are only visible under the right backlighting. The print layout includes a wheel, several buttons and a flextail on the side - Fig. 9 : Screw-type injector with accumulation function : the modified geometry and continuous rotation prevent melt backflow during the injection and holding pressure phase - Fig. 10 : Changes in injection volume, viscosity and pressure curve can influence part quality. In the worst case, as shown here, different interfering factors occur at once - Fig. 11 : System for tht optical monitoring of caps : the quality characteristics actually measured are fed into the process control - Fig. 12 : Automatic speed control significantly reduces the temperature-control units' share of the total amount of energy consumed by the injection molding system - Fig. 13 : Simulation of the temperature change inside the injection mold during cyclical operation. Heat pipes permit rapid heat exchange. The heat from the melt can either be transferred completely out of the mold or into defined climatic zones in areas far from the cavity - Fig. 14 : Schematic structure of a core cooling system using evaporable refrigerants - Fig. 15 : The main advantage of the FDU flat die unit hot runner nozzle is the greater throughput per unit of time, as a result of which injection times can be significantly shortened without having to accept significant reductions in gating quality - Fig. 16 : The stiff core and up to 500 soft bristles of intradental brushes can be produced by 1-component injection molding - Fig. 17 : Before the bicycle saddle is produced in the injection mold supplied by GK Tool, the structure-reinforing laminates, cut to size, are heated in an IR oven from Krelus Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31372 [article]

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In between industry 4.0 and market intelligence / Wolfgang Boos in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 19-23 Titre : In between industry 4.0 and market intelligence : Compare, Compile, Conduct – Further strategic development in the tool and die industry Type de document : texte imprimé Auteurs : Wolfgang Boos, Auteur ; Christoph Kelzenberg, Auteur ; Jan Wiese, Auteur ; Jens Helbig, Auteur Année de publication : 2018 Article en page(s) : p. 19-23 Langues : Anglais (eng) Catégories : Analyse stratégique Études de marché Matières plastiques -- Industrie et commerce Moules d'injection Outillage Planification stratégique Index. décimale : 668.4 Plastiques, vinyles Résumé : The producing industry is increasingly involved in changes due to progressing globalization and derivatization, shorter product lifetimes, and demographic change – with enormous consequences for mold making as well. This is why mold making companies have to continue further development. In actual practice, a so-called 3C approach to "compare, compile, and conduct" has proven effective. Note de contenu : - Changed market conditions for the tool and die industry - Industrialization, market intelligence, and digital networking - The necessity for systematic strategy development - Benchmarking interpretation enables goal-setting - Figure : Further strategic development is more important than ever for technologically motivated machine tool operations - Fig. 1 : Opportunities and risks for the tool and die industry due to changed market conditions till 2025 - Fig. 2 : The 3C approach consists of the steps "compare", "compile", and "conduct" - Fig 3 : Compare : this except from a benchmarking - based on a data bank with more than 1000 data sets of German tool and die manufacturers - is an example of an indicator-based comparison of companies - Fig. 4 : Compile : as a consequence of benchmarking, concrete fields of action can be derived for the company's operation - Fig. 5 : Conduct : an optimized planning systematic can shorten lead-in times and increase transparency and productivity in production. This could be concluded from the example of the measures derived here Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31434 [article]

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Additive adolescence / Olivier Kessling in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 24-30 Titre : Additive adolescence : Materials manufacturers and process developers face growing demands in 3D printing Type de document : texte imprimé Auteurs : Olivier Kessling, Auteur Année de publication : 2018 Article en page(s) : p. 24-30 Langues : Anglais (eng) Catégories : Automobiles -- Freins Avions -- Matériaux Biomatériaux Composites à fibres de carbone Impression tridimensionnelle Polyamide 6 Polycarbonates Polyéther éther cétone Polymères hautes performances Index. décimale : 668.4 Plastiques, vinyles Résumé : Much as when injection molding materials were being developed 30 years ago, the current trend in additive production is toward higher melting materials and materials with improved mechanical properties. The latter can be achieved, for example, by fiber embedding. In machine technology, the developments are increasingly aimed at adapting processing times, sensor systems, and quality monitoring to the demands of high-tech companies. Note de contenu : - High-performance plastics for filament printers and carbon nanotube embedding - Increeasing activity among materials manufacturers - Bio-based and biologically degradable materials - Materials for tool and mold making - Faster and more precise - futher developments in processing - Trends in the additive production of metal parts - Mold inserts with conformal cooling - Using the process chain of powder injection molding for 3D printing - Part finishing treatment - Figure : Sample of a complex part 3D-printed from PA6 - Fig. 1 : 3D-printed parts from materialise for th ecabin interior of Airbus airplanes - Fig. 2 : Fixture made from Antero 800NA to replace a conventionally manufactured PEEK part for mounting hydraulic parts on an airplane wing - Fig. 3 : Carbon nanotubes embedded in plastics include conductive structures in USB demonstrators, thereby enabling an LED to glow - Fig. 4 : Design study made from a carbon fiber-filled polyamide. The part was produced in a laser sintering process - Fig. 5 : Roadmap for materials development at HP. The next steps will probably be toward high-performance materials, flame-retardant and hollow glass sphere-filled materials - Fig. 6 : This model of the heart of a young girl named Jemma was created by an HP Jet Fusion 500/300 series 3D printer. The model helped surgeons prepare for a complicated heart OP - Fig. 7 : This part made from PC with 13% carbon fiber content was melting pot and stirred by rotary motion of a spiral (transparent) and a PC with 30 % CF (black) was put in the printer manufactured from two raw materials. A simple mixture of pure PC - Fig. 8 : Developed by Bugatti: this 8-piston monoblock brake caliper is the world's first brake caliper made by 3D printing and also the largest generatively produced titanium part. Thanks to optimized structures, a 40% weight saving was possible - Fig. 9 : Additively produced mold insert with confor¬mal cooling chan¬nels. The mold insert is produced in layers of metal powder - Fig. 10 : Production system from Desktop Metal. The so-called Single Pass Jetting technology is claimed to be 100 times faster than laser based systems. Market introduction is planned for 2019 - Fig. 11 : Powershot S blasting creates a homo-geneous surface quality and reduces the roughness typical of additively produced - Fig. 12 : Schematic illustration of chemical part smoothing. The untreated part is on the left, the one on the right has gone through the smoothing process Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31435 [article]

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Digitalization instead of disruption / Jens P. Siepmann in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 31-35 Titre : Digitalization instead of disruption : Systematic improvement of already tried-and-tested material handling products Type de document : texte imprimé Auteurs : Jens P. Siepmann, Auteur Année de publication : 2018 Article en page(s) : p. 31-35 Langues : Anglais (eng) Catégories : Convoyeurs Echanges de données Gravimétrie (chimie analytique) Industrie 4.0 Le concept d’Industrie 4.0 correspond à une nouvelle façon d’organiser les moyens de production : l’objectif est la mise en place d’usines dites "intelligentes" ("smart factories") capables d’une plus grande adaptabilité dans la production et d’une allocation plus efficace des ressources, ouvrant ainsi la voie à une nouvelle révolution industrielle. Ses bases technologiques sont l'Internet des objets et les systèmes cyber-physiques. Innovations Logiciels Malaxeurs et mélangeurs Manutention -- Appareils et matériel Matières plastiques -- Recyclage Mesure -- Instruments Séchoirs Systèmes de refroidissement Traçabilité Index. décimale : 668.4 Plastiques, vinyles Résumé : Conveying, mixing, metering, drying, processing – this briefly circumscribes the tasks of material handling. Today, connectivity and energy efficiency for users, in particular, play a major role. Ancillary equipment manufacturers, too, are orienting themselves to this and continuing the development of their product series. Disruptive innovations are rare. Note de contenu : - Gravimetric metering with extras - Conveyor technology in a connected environment - Processing for recycling - Cooling during mixing - Residual moisture and efficiently controls the dryer - Figure : Smart solutions for conventional tasks : in material handling, data exchange between the components is increasing in importance. The eco-plant control in this installation protects the material against, e.g., overdrying and still provides reliably dried material - Fig. 1 : Traceability : the Gravilog software package permits data recording during metering - Fig. 2 : The Easylink+ coupling station offers more functions, with its integration into Winfactory 4.0 via OPC UA - Fig. 3 : Hollow channels do the trick : the P1 cooling mixer cools the melt during mixing - Fig. 4 : Efficient drying : to correctly choose the drying parameters, the Moisture Meter Manager takes into account the residual moisture content of the pellet Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31436 [article]

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Polyurethanes moving with the times / Florian Kessler in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 36-40 Titre : Polyurethanes moving with the times : Specialization, resource efficiency, and digitalization are driving developments Type de document : texte imprimé Auteurs : Florian Kessler, Auteur ; Daniel Schneider, Auteur Année de publication : 2018 Article en page(s) : p. 36-40 Langues : Anglais (eng) Catégories : Matériaux -- Allègement Matières plastiques -- Moulage par injection Moussage (chimie) Mousses plastiques Polymères -- Applications industrielles Polyuréthanes Système de changement de couleur Index. décimale : 668.4 Plastiques, vinyles Résumé : This versatile material is continually opening up new areas of application. A processing technology that achieves high component quality and cost efficiency is the requirement for PU products to be manufactured competitively. Rapid digitalization is playing an increasingly important role here. Note de contenu : - Rapid color changes - Sealed tight - Saving resources - Lightweight structural components with PU - Polyurethane 4.0 - Thanks to their versatility, polyurethane applications are advancing on all fronts: here is a current example of a polyurethane foam seal made from Fermapor CC with very low moisture absorption and good resistance to ice water, which is a favorably priced alternative to previous closed-cell systems or silicone foams, according to the manufacturer - Fig. 1 : Colourline multi-connect : this modular machine system can reduce color changing to less than 15 min - Fig. 2 : Rapid color changing: with the MK10/15-UVP-2K+4 transfer mixing head, up to four colors can be metered without colorant carryover - Fig. 3 : Carabiner closure: this tool technology for cable foam encapsulation seals off insulat¬ed cable strands so that no foam can escape from the tool - Fig. 4 : iPul line for the production of fiber-reinforced polyurethane profiles: in this complete line, fiber impregnation takes place in a closed injection box, which reduces pollution of the work environment and allows higher production speeds - Fig. 5 : UltraSim: with foaming simulation, it is possible not only to describe the processing of steer¬ing wheels but also to determine their mechanical behavior Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31444 [article]

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Lightweight cost benefits / Kai Fischer in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 41-45 Titre : Lightweight cost benefits : Fiber-reinforced thermoplastics for large series Type de document : texte imprimé Auteurs : Kai Fischer, Auteur Année de publication : 2018 Article en page(s) : p. 41-45 Langues : Anglais (eng) Catégories : Composites à fibres Composites thermoplastiques Coût -- Contrôle Fibres continues Matériaux -- Allègement Matières plastiques -- Applications industrielles Index. décimale : 668.4 Plastiques, vinyles Résumé : Plastics reinforced with continuous fibers were long considered a cost driver because the processing technologies did not support large quantities. Thanks to thermoplastic matrix materials in combination with new semi-finished goods and processing methods, this material class is now coming very close to industrialization. Note de contenu : - From economic efficiency to industrialization - Component optimization reduces production costs - Material base with great cost reduction potential - Flexible semi-finished goods for high loads - Lighweight construction in technical applications - Production of individual tape laminates - Fig. 1 : This illustration shows three qualitative measures for production cost reduction via the cost of materials, and the weighting of the respective influence - Fig. 2 : In addition to weight advantages, cost reduction potential in large series can also be realized through function integration. Both the pass-through for the Landrover Discovery and the door modules support lightweight construction for large quantities with cost advantages - Fig. 3 : For weight and cost-efficient lightweight construction, the mechanical properties of the brake pedal can be adapted through local reinforcement with tapes - Fig. 4 : PrePro 2D system for the production of tailored blanks using direct consolidation of thermoplastic tapes with infrared radiation - Fig. 5 : Airborne system concept for manufacturing individual laminates based on UD tapes, suitable for large series - Fig. 6 : Prototype system for manufacturing direct-consolidated tailored blanks at the Aachen Center for Integrative Lightweight Production (AZL) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31445 [article]

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Into the process at the speed of light / Dorothea Marquardt in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 46-51 Titre : Into the process at the speed of light : Faster process and product control thanks to inline optical spectroscopy Type de document : texte imprimé Auteurs : Dorothea Marquardt, Auteur ; Franziska Eichhorn, Auteur ; Norbert Halmen, Auteur ; Christoph Kugler, Auteur ; Thomas Hochrein, Auteur ; Martin Bastian, Auteur Année de publication : 2018 Article en page(s) : p. 46-51 Langues : Anglais (eng) Catégories : Analyse spectrale Colorimétrie Ligne d'extrusion Matières plastiques -- Extrusion Index. décimale : 668.4 Plastiques, vinyles Résumé : Spectroscopic instrumentation has a wide application field in plastics processing. However, users have held back from purchasing process analytics. This is despite the fact that instrumentation methods can, both in the near infrared and visible spectral ranges, be smartly and robustly integrated into the process. Note de contenu : - Inline measurement of colors in continuous processes - Determining the residence time of materials - Inline colorimetry in discontinuous processes - Measurment in the near infrared range - Chemometric and NIR-spectroscopy - NIR/VIS-Inline analytics for compounding - Inline formulation and viscosity sensor - Fig. 1 : A view in the melt : colorimetry probe with spherical sapphire window and scew thread (1/2" 20 UNF) for use in extrusion lines - Fig. 2 : Installation position of the color measurement system in the blow molding machine - Fig. 3 : ExtruSens spectroscopy system with fiber-optic - Fig. 4 : AddiCheck measurement system for extrusion applications - Fig. 5 : Comparison of the measurement probes in the extrusion process in line, online, atline, offline Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31446 [article]

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Three at one blow / Jochen Mitzler in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 52-55 Titre : Three at one blow : KraussMaffei and Leonhard Kurz optimize the combined IMD and IML film processes Type de document : texte imprimé Auteurs : Jochen Mitzler , Auteur ; Jens Fiedler, Auteur ; Philipp Lachner, Auteur ; Martin Hahn, Auteur Année de publication : 2018 Article en page(s) : p. 52-55 Langues : Anglais (eng) Catégories : Automatisation Décoration dans le moule Etiquetage dans le moule Matières plastiques -- Moulage par injection Index. décimale : 668.4 Plastiques, vinyles Résumé : In one of the cavities, a control display is created in so-called dead-front design with a touch sensor. In the adjacent cavity, a component is made with faux-concrete surface aesthetics that can be lit from behind. At the Fakuma trade show, KraussMaffei and Leonhard Kurz demonstrate the degree of functional integration made possible by combining the IMD and IML film processes. The new IMD SI Duo film feed is the first-ever solution capable of positioning two decorative strips independently of each other. The first series application is already up and running. Note de contenu : - Initial independent positioning of two IMD strips yields clear benefits - Fully automated process - from film insertion to component timming - Space-saving design paired with high flexibility - Initial use in series production - Figure : The free space below the clamping unit creates the conditions for film routing, even for automation tasks with two film strips - Fig. 1 : Compact and flexible at the same time : the all-electric PX 320 with integrated automation cell combines the IMD and IML processes - Fig. 2 : Function and decor rolled into one: at Fakuma, a complete ten-inch HMI display in dead front design, with integrated electronics and top coat for scratch resistance, takes shape on the PX 320 in one production step - Fig. 3 : In the second cavity of the same mold, a display trim that can be lit from behind is shaped with faux-concrete surface aesthetics - Fig. 4 : Consistent lightweight design: the insertion and removal gripper developed by KraussMaffei is made of carbon and allows for the use of smaller base units - Fig. 5 : Compact automation: a six-axis robot inserts the components into the laser trim-ming station. Visible in the background: the conveyor with UV tunnel and, behind it, the clamping unit with the film feed - Fig. 6 : The two-platen machines of the CX series make very efficient use of the installation area for the IMD process and ensure outstanding accessibility of all components thanks to their ejector space door En ligne : https://www.kunststoffe.de/en/journal/archive/article/kraussmaffei-and-leonhard- [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31447 [article]

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So that the heart of the machine beats longer / Gerhard Dimmler in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 56-59 Titre : So that the heart of the machine beats longer : Avoid standstills by permanently monitoring hydraulic pumps and hydraulic oil Type de document : texte imprimé Auteurs : Gerhard Dimmler, Auteur ; Johannes Kilian, Auteur ; Pascal Bader, Auteur ; Lukas Muttenthaler, Auteur ; Paul Kapeller, Auteur Année de publication : 2018 Article en page(s) : p. 56-59 Langues : Anglais (eng) Catégories : Machines hydrauliques Maintenance prévisionnelle La maintenance prévisionnelle (aussi appelée "maintenance prédictive" par calque de l'anglais "predictive maintenance", ou encore "maintenance anticipée") est une maintenance conditionnelle basée sur le franchissement d’un seuil prédéfini qui permet de donner l'état de dégradation du bien avant sa détérioration complète. La maintenance prévisionnelle est, selon la norme NF EN 13306 X 60-319, une "maintenance conditionnelle exécutée en suivant les prévisions extrapolées de l'analyse et de l'évaluation de paramètres significatifs de la dégradation du bien". Son principe est le suivant : tout élément manifeste des signes, visibles ou non, de dégradation qui en annoncent la défaillance. Le tout est de savoir reconnaître ces signes précurseurs. Des appareils permettent de mesurer cette dégradation, laquelle peut être une variation de température, de vibration, de pression, de dimension, de position, de bruit, etc. Ces dégradations peuvent donc être d’ordre physique, chimique, comportemental, électrique ou autre. Le but de cette maintenance est d’agir sur l’élément défaillant au plus près de sa période de dysfonctionnement. Elle permet aussi de suivre une dégradation dans le cas d’une durée de vie variable d’un élément. Toutes ces actions permettent donc de réduire la fréquence des pannes tout en optimisant la fréquence des interventions préventives. La maintenance prévisionnelle a la particularité d’être facile à suivre mais est plus complexe à mettre en place. Pompes Index. décimale : 668.4 Plastiques, vinyles Résumé : Unplanned production downtime can have far-reaching consequences in an injection molding company until delays in delivery. In the form of e-connect.monitor, Engel offers a solution for analyzing the condition of critical machine components, which avoids unanticipated downtime. Following the introduction of two modules for monitoring plasticizing screws and ball screws, the company is now presenting further e-connect.monitor modules for condition monitoring of hydraulic pumps and hydraulic oil. Note de contenu : - Three factors as the cause of decreasing oil quality - Three oil monitoring strategies - Wear values from monitoring of fixed displacement pumps - Fig. 1 : A wide variety of factors influence oil quality. As the hydraulic oil ages, the particulate content increases, especially in the range > 4 µm, thus changing the oil properties - Fig. 2 : Over the service life, the water content in the hydraulic system increases. This deteriorates the friction properties and also leds to corrosion - Fig. 3 : The condition of the hydraulic oil and the pumps (shown in th escreenshot) is clearly displayed on the e-connect customer portal. The system can automatically send status messages and warning messages Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31448 [article]

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Directed air flow / Fabian Kayatz in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 60-63 Titre : Directed air flow : Forming air impact technology for formed parts with higher quality Type de document : texte imprimé Auteurs : Fabian Kayatz, Auteur ; Simon Wagner, Auteur ; Andre Schult, Auteur ; Manuel Münsch, Auteur ; Jens-Peter Majschak, Auteur ; Antonio Delgado, Auteur Année de publication : 2018 Article en page(s) : p. 60-63 Langues : Anglais (eng) Catégories : Matières plastiques -- Thermoformage Index. décimale : 668.4 Plastiques, vinyles Résumé : The material distribution is often the main quality criterion in thermoforming. A precisely directed air flow can influence the local thickness of semi-finished products without the need for complex plug pre-stretching devices. A further advantage: the process is particularly easy to implement. Note de contenu : - Conventional technologies - Experimental and simulation results - Forming Air Impact Technology - Fig. 1 : Compressed air negative forming via FIT in a rotationally symmetric tool : a) experimental set-up, b) molded part geometry and position of the measurement point - Fig. 2 : Flow speed of the fluid (m/s) when using Forming Air Impact technology with a central nozzle in the forming tool - Fig. 3 : Normalized thickness of A-PET at point M1 as a function of different parameters for a combination of the ring and central nozzles - Fig. 4 : Comparison of the semi-finished product temperature during conventional negative pressure forming and using Forming Air Impact Technology. Right the time-temperature profile when using Forming Air Imact Technology (rotation axis in Fig. 1) - Table : Nozzle parameters and parameter regions investigated in the simulation studies Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31453 [article]

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In the right place at the right time / Christian Frauenschuh in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 64-66 Titre : In the right place at the right time : Efficient film thermoforming using halogen infrared emitters and algorithms Type de document : texte imprimé Auteurs : Christian Frauenschuh, Auteur ; Roland Giglmaier, Auteur Année de publication : 2018 Article en page(s) : p. 64-66 Langues : Anglais (eng) Catégories : Algorithmes Chauffage -- Appareils et matériels Economies d'énergie Films plastiques Matières plastiques -- Thermoformage Rayonnement infrarouge Temps de cycle (production) -- Réduction Index. décimale : 668.4 Plastiques, vinyles Résumé : During thermoforming, films need to be heated as quickly as possible, both in defined areas and across the entire surface. Frimo has developed a new film heating process, called Time Shifted Heat Control, specifically for this reason. The key to heating the film using halogen infrared emitters is a specially-developed calculation algorithm. Note de contenu : - Complete film heating system - Lower space requirements and higher flexibility - Energy saving and shorter cycle times - The time shifted heat control heating system consists of halogen infrared emitters, which operate efficiently by using an individualized calculation algorithm. The individual emmitters can be changed out quickly without an electrician - Fig. 1 : Thermoforming machine with heater bank upgraded to TSHC - Fig. 2 : The operator can input the surface temperature that must be reached in degrees Celsius rather than the typical percentage of maximum output - Fig. 3 : Emmiter activation sequence after 1s, 3s and 4.5s. The clamp frame influences the film perimeter heating. The halogen infrared emitters on the edges are therefore switched on earlier than those in the middle - Fig. 4 : An infrared picture shows the homogeneous Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31454 [article]

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Pressure-stable joining of microfluidic systems / Ramazan Kocaman in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) Titre : Pressure-stable joining of microfluidic systems : Laser welding gives stability to the core component of a medical device Type de document : texte imprimé Auteurs : Ramazan Kocaman, Auteur Année de publication : 2018 Langues : Anglais (eng) Catégories : Matériel médical Matières plastiques -- Soudage Microfluidique Polymères en médecine Polyoxyméthylène Soudage laser Index. décimale : 668.4 Plastiques, vinyles Résumé : In the production of a micro water jet device for medical wound cleaning, two POM-H components are assembled, which later must withstand pressures up to 400 bar. Laser plastic welding proves to be a high-quality and reliable joining technology for such challenging conditions. Note de contenu : - Stable against high, pulsating pressure - Laser welding on micromaterial systems - Fig. 1 : A laser machine from LPKF, comparable to this model PowderWeld6600, welds the components of the valve block together - Fig. 2 : Valve block : the white laser-transparent POM-H component must be firmly welded to the black laser-absorbing plastic element and withstand pressures up to 400 bar - Fig. 3 : The TMG3 transmission measuring device measures the material properties and thus ensures that only suitable material is used to manufacture the valve blocks Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31455 [article]

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Polymer powder in additive manufacturing / Nicole Rapelius in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 72-77 Titre : Polymer powder in additive manufacturing : Part 2 : Development of a qualifying testing concept Type de document : texte imprimé Auteurs : Nicole Rapelius, Auteur ; Regina Schreiber, Auteur Année de publication : 2018 Article en page(s) : p. 72-77 Langues : Anglais (eng) Catégories : Essais (technologie) Frittage laser Impression tridimensionnelle Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Polypropylène Poudres Index. décimale : 668.4 Plastiques, vinyles Résumé : Polymer powders for laser sintering must exhibit special intrinsic and extrinsic properties. A new concept for the characterization and evaluation of laser sintering powders permits conclusions to be drawn about aging as well as the suitability of novel powder systems – even before the first build job. Note de contenu : - Requirements for powder properties - Testing concept in five stages - Practical application example - Table 1 : Possible testing methods and characterization criteria for polymer powder - Table 2 : Application example for a completed test results table Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31457 [article]

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Making the switch with e-mobility / Anika van Aaken in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 78-81 Titre : Making the switch with e-mobility : Semicrystalline thermoplastics for electrical and electronic components Type de document : texte imprimé Auteurs : Anika van Aaken, Auteur ; Julian Haspel, Auteur Année de publication : 2018 Article en page(s) : p. 78-81 Langues : Anglais (eng) Catégories : Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Polyamide 6 Polyamide 66 Polymères semi-cristallins Résistance thermique Thermocinétique Thermoplastiques Une matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire. Véhicules électriques Index. décimale : 668.4 Plastiques, vinyles Résumé : For years, the temperature resistance of engineering thermoplastics increased, but now new forms of mobility require a whole range of other properties. Although the exact specifications for plastic components in e-mobility vehicles and infrastructure are still being discussed, the first production-ready material types are already in the starting blocks. Note de contenu : - New mix of requirements - Different requirements under discussion - Reducing the risk of vehicle fires - Managing heat properly - Resistant to battery electrolytes, avoiding electrocorrosion - Composites with electromagnetic shielding properties - Advanced hybrid technology for lightweight construction - Fig. 1 : Advantages of thermoplastics in components for electromobility and new challenges - Fig. 2 : Temperature of a heat sink as a function of thermal conductivity λ : from a heat sink thermal conductivity of 1.0 to 1.5 W/m.K the temperature of the heat sink is increasingly dependent on air convection - Temperature distribution on spherical, internally heated hollow test body made of polyamide : simulation with convective heat transfer ; same simulation as sectional view ; heat measurement with IR cameria (same color-temperature scale as in simulation) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31458 [article]

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A virtual seating trial / Christian Schweiger in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 82-84 Titre : A virtual seating trial : Performing simulation in parallel with design reduces the development time of the metrik chair Type de document : texte imprimé Auteurs : Christian Schweiger, Auteur ; Patrick Frey, Auteur ; Eva Höfli, Auteur Année de publication : 2018 Article en page(s) : p. 82-84 Langues : Anglais (eng) Catégories : Matières plastiques -- Propriétés mécaniques Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Sièges Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : An integrated approach to simulation and design has a long tradition at BASF. The cooperation with the office furniture manufacturer Wilkhahn shows, with the example of the Metrik cantilever chair, how designers and engineers work together efficiently. This offering will be further extended in the future. Note de contenu : - Solving conflicting goals in material selection - Simulating mechanical properties - Modified geometry and overall concept - Fig. 1 : The simulation tool shows the glass fiber orientation expected in the part. The red-marked areas have a high degree of unidirectional orientation, blue shows a low degree of unidirectional orientation - Fig. 2 : The chair is deformed under a defined test load. The principal stresses here are the tensile loading and compressive stress - Fig. 3 : The simultated deformation of the seat pan under service load En ligne : https://www.kunststoffe.de/en/journal/archive/article/performing-simulation-in-p [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31459 [article]

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Fine lines in light and dark / Joachim Bernhard in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 85-88 Titre : Fine lines in light and dark : Special compounds for light reflection, light scattering, and black panel effect Type de document : texte imprimé Auteurs : Joachim Bernhard, Auteur Année de publication : 2018 Article en page(s) : p. 85-88 Langues : Anglais (eng) Catégories : Appareils électroménagers Commande tactile Eclairage Matières plastiques Index. décimale : 668.4 Plastiques, vinyles Résumé : Touch operation of devices was introduced on the smartphone, transferred to the automobile, and has also established itself for household appliances in the meantime. Specific plastic compounds offer precisely adjustable properties for seamless surfaces, including control elements and fade effects. Note de contenu : - A user interface has to combine function and design - Reflective and light blocking plastics for light wells and reflectors - Light diffusing compounds for homogenous illumination - High-quality surfaces in piano lacquer look - Fig. 1 : A classic 7-segment washing machine display. Highly reflective and opaque plastic compounds are needed for the background of the assembly - Fig. 2 : Alcom LB Light Blocking compounds for light wells and 7-segment displays - mode of action. A highly reflective and simultaneously light blocking material ensures that the individual segments are sharply defined - Fig. 3 : A look at the back of the 7-segment display reveals the reflector. It prevents light from one segment from shining through into an adjacent segment - Fig. 4 : An electronics housing with integrated reflectors for a Verocup coffee machine manufactured by Bosch. An ABS compound, Alcom AWL 109/15 WT1217-11LB, is used - Fig. 5 : Touch control element on a coffee machine. Polycarbonate compounds are used when a higher thermal resistance is required, for example on stove displays or cooktops - Fig. 6 : In contrast to the ponctual LED light source, backlit displays and control elements demand a homogenous appearance regardless of the view angle. Special light scattering additives in the compound ensure even light distribution - Fig. 7 : Symbols backlit in color and a very sharp contrast between light and dark in combination with a piano lacquer look are possible with Alcom LDDC En ligne : https://www.kunststoffe.de/en/journal/archive/article/special-compounds-for-ligh [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31460 [article]

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Effects without drawbacks / Laurent Deloux in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 89-93 Titre : Effects without drawbacks : Special encapsulation makes metallic effects inert and weather-resistant Type de document : texte imprimé Auteurs : Laurent Deloux, Auteur ; Marc Hunger, Auteur ; Gordon Price, Auteur ; Volker Wilhelm, Auteur Année de publication : 2018 Article en page(s) : p. 89-93 Langues : Anglais (eng) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite. L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement. L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium. Dioxyde de titane Encapsulation Essais accélérés (technologie) Matières plastiques -- Additifs Photostabilité Pigments à effets spéciaux Pigments nacrés Polypropylène Résistance aux conditions climatiques Stabilisants (chimie) Index. décimale : 668.4 Plastiques, vinyles Résumé : Pearlescent pigments produce striking effects in thermoplastics. However, the natural photoactivity of TiO₂ influences the stability of the polymer matrix. Unlike off-the-shelf organic stabilizations, the inorganic "Way" technology significantly reduces the photoactivity of effect pigments, which in turn opens up new design possibilities for plastic products with high UV exposure. Note de contenu : - Metallic effects with pigments of high stability - Temperature-stable pigment encapsulation for hih resistance - Full effect due to robust stabilization - Proven functionality and color stability - chemically durably stable - Figure : Whether in automobiles, consumer goods or mobile devices, metallic luster is in demand. Organic-coated TiO2 pearlescent pigments have been established in coating systems for many years. Now the trend leans toward mass-dyed plastic components that include new stabilizing additives - Fig. 1 : Scanning electron microscope (SEM) image of a TiO2-based pearlescent pigment - Fig. 2 : Comparative tests on dark yellowing with different types of encapsulation. Unlike the standard pigment on the right, Iriodin 119 way shows no yellwoing after 284h of exposure to UV radiation - Fig. 3 : SEM image of pearlescent pigments Iriodin 103 Way. The new stabilization does not disturb does not disturb the visual properties of the pigment - Fig. 4 : Relative photoactivity of different types of encapsulation, which has a direct impact on the overall system's light resistance and is lowest with the pigment with Way coating - Fig. 5 : Color change Delta E : Iriodin 6163 Way compared to Iriodin 6163 and a competitor's pearlescent with organic coating, each with 1% in PMMA after 5000 h in the sun teste according to DIN EN ISO 11341 - Fig. 6 : Delta E color change of various pigments with 1% in PP, immersed for 35 days in 5% ammonia solution - Fig. 7 : Microscopic cracks after 400 h in the sun tester according to DIN EN ISO 11341 of Iriodin 6163 way and aluminum flake pigment with 1% in PP - Fig. 8 : Set-up of a drop test to determine the mechanical stability when using 1% Iriodin 6163 Way or 1% aluminum pigment in PP - Table 1 : Result of a micromechanical scratch test to quantify the deformation when using 1 % Iriodin 6163 Way or 1 % aluminum pigment in PP. Conditions: 1000 h in the sun tester according to DIN EN ISO 11341 - Table 2 : Results of a drop test to determine the mechanical stability (drop height to material fracture). Two different PP specimens, respectively with 1 % Iriodin 6163 Way or 1 % aluminum pigment were compared after six months of outdoor weathering En ligne : https://www.kunststoffe.de/en/journal/archive/article/special-encapsulation-make [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31461 [article]

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