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Beyond human capabilities / Mauritius Schmitz in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 89-93 Titre : Beyond human capabilities : Model-based process setup by fully interconnected production in injection molding Type de document : texte imprimé Auteurs : Mauritius Schmitz, Auteur ; Christian Hopmann, Auteur ; Malte Röbig, Auteur ; Lukas Pelzer, Auteur ; Bastian Topmöller, Auteur ; Simon Wurzbacher, Auteur Année de publication : 2019 Article en page(s) : p. 89-93 Langues : Anglais (eng) Catégories : Algorithmes Composants moulés interconnectés Matières plastiques -- Moulage par injection Numérisation Index. décimale : 668.4 Plastiques, vinyles Résumé : The quality of injection molded parts and the process stability are still heavily dependent on the knowledge and experience of the process technician. However, the ever increasing degree of freedom creates complex interrelationships between part quality and process parameters. At K 2019, IKV and an industrial consortium will demonstrate how algorithms based on artificial intelligence can support machine operators during the process setup by using machine data and quality data. Note de contenu : - The setup time correlates with the experience of the process technician - The database of an automatic process setup - Special algorithms calculate usable information - Development and use of the digital shadow by a master computer system - The neural network is pre-trained - Inline functionalization of injection molded parts by additive manufacturing - Fig. 1 : Longer time-to-production due to process interruption in the classic setup process - Fig. 2 : The fully interconnected manufacturing cell is used to find the optimal process point - Fig. 3 : Collecting and using process, peripheral, quality and external data i ninjection molding to build a process model of the injection molding process - Fig. 4 : Functionalization of injection molded parts with TPU and-slip lines using additive and manufacturing in the cycle of the injection molding machine - Fig. 5 : Further IKD projects at K2019 include the load-compliant design and optimization of additive-manufactured components with complex 3D infill structures and plasma-assisted internal coating of prefilled plastic syringes to reduce friction En ligne : https://drive.google.com/file/d/1dBgTLOYzwQVYcU5HN6B189CV1VO44_oe/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33162 [article]

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Production brought to growth / Susanne Palm in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 94-95 Titre : Production brought to growth : How TN plastics produces thin-walled containers resource-efficiently Type de document : texte imprimé Auteurs : Susanne Palm, Auteur Année de publication : 2019 Article en page(s) : p. 94-95 Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection Matières plastiques -- Recyclage Polypropylène Pots de fleurs Index. décimale : 668.4 Plastiques, vinyles Résumé : They are needed in thousands of units in Dutch greenhouses: plant pots. TN Plastics from Netherlands produces these thin-walled containers with Arburg injection molding machines in high quality and large volumes, around the clock, 363 days a year and above all resource-efficiently – using the own PP recyclate. Note de contenu : - High-performance packaging versions - Detailed coordination - Savings down to the last tenth of a second En ligne : https://drive.google.com/file/d/1PJVFgAtrJ-0Kq7L0n3zJINkArmppxcqD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33172 [article]

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Amorphous metals combined with elastomers in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 96-97 Titre : Amorphous metals combined with elastomers : Engel and Heraeus to demo a new processing unit for large-scale production Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 96-97 Langues : Anglais (eng) Catégories : Assemblages multimatériaux Automatisation Elastomères Matériaux amorphes Matières plastiques -- Moulage par injection Métaux Presses à injecter Production en série Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Temps de cycle (production) -- Réduction Index. décimale : 668.4 Plastiques, vinyles Résumé : Injection molding manufacturer Engel and technology group Heraeus have succeeded in slashing cycle times in the injection molding of amorphous metals. In so doing, the two system partners have rendered these alloys, which possess special properties, amenable to large-scale production over a wide range of end uses. The K 2019 trade fair will see two-component parts made of amorphous metal and silicone being produced for the first time – inside a fully automated manufacturing cell. Note de contenu : - Modified injection unit - Fully automated process with two robots - Geared for high-volume production En ligne : https://drive.google.com/file/d/1ySByzMQqVgbWJHGLIddMxR6n1tIMTkCM/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33173 [article]

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Co-extrusion with thermal control / Georg Burmann in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 98-101 Titre : Co-extrusion with thermal control : Combining polymers with very different processing temperatures Type de document : texte imprimé Auteurs : Georg Burmann, Auteur ; Patrick Weiss, Auteur Année de publication : 2019 Article en page(s) : p. 98-101 Langues : Anglais (eng) Catégories : Composites polymères Filières d'extrusion circulaire Matières plastiques -- Extrusion Structures multicouches Traitement thermique Tubes Index. décimale : 668.4 Plastiques, vinyles Résumé : New polymer composites for the production of multi-layer small tubes are being developed to give products specific functions. With suitable co-extrusion dies and a thermal barrier option, even complex layer composites with melt temperature differences of more than 50 °C can be processed reliably and in high quality. Note de contenu : - Circular distributor dies avoid flow lines - Demands on co-extrusion dies - Suitable for complex materials combinations - Simulating thermal behavior in the die - A die for less complex materials combinations - Principle of circular distribution - Fig. 1 : The circular distribution principle : A circular distributor and the simulation of radial circumferential distribution after pre-distribution of the melt - Fig. 2 : 5-layer fuel line Tube cross-section and detailed view - Fig. 3 : CV-t 5-layer co-extrusion die in part-sectional view ; the colored areas represent the five materials to be processed, i.e., their distribution. The numbers indicate the individual layer modules within the die - Fig. 4 : Simulation of the thermal condition within the CV-T die duringproduction of a 5-layer fuel line En ligne : https://drive.google.com/file/d/15cLGzZRbNieUu_wA4GFIDro4RFPp4Oup/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33174 [article]

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Energy-efficient use of drives / Dieter Drescher in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 102-106 Titre : Energy-efficient use of drives : Process-oriented design of the main drive for the extruder Type de document : texte imprimé Auteurs : Dieter Drescher, Auteur ; Christian Angsmann, Auteur Année de publication : 2019 Article en page(s) : p. 102-106 Langues : Anglais (eng) Catégories : Efficacité énergétique Extrudeuses Moteurs Systèmes d'entrainement (technologie) Index. décimale : 668.4 Plastiques, vinyles Résumé : Manufacturers of standard extruders sometimes incorporate oversized drives into their machine designs in order to be able to cover a wide range of requirements. In times of high energy prices, however, this is no longer economical. An extruder should be equipped with a drive package that is matched to the gearbox and the processing unit. But what are the requirements governing the design of the drive system ? Note de contenu : - Requirements imposed on the extruder main drive - Properties of different motors - Machine-specific drive dimensioning - Performance-optimized design - Fig. 1 : Efficiencies of the considered motor types at the rated point with a rated motor power of approx 45 kW - Fig. 2 : Power flow of the extruder main drive : losses occur in the frequency inverter, motor and gear - Fig. 3 : Field weakening range : while the motor power of a three-phase asynchronous motor initially rises linearly with the speed when the inverter is fed in, it remains constant from the rated frequency (fn) onward. Above this, the previously constant torque drops slightly - Fig. 4 : Operating mode of the same motor with and without field weakening with optimized overall ratio - Fig. 5 : Setting for constant torque range to field weakening range (same drive, increased ratio) - Fig. 6 : Comparison of stator designs : an inverter-optimized three-phase asynchronous motor of 44 kW output is considerably more compact than the standard motor behind it, which is only slightly more powerful at 45 kW - Table 1 : Requirements imposed on extruder main drive - Table 2 : Example dimensioning of a three-phase drive with and without field weakening En ligne : https://drive.google.com/file/d/1aC5G_nirlAm-xwUFz9VQpdIZIzLgXh0I/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33175 [article]

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Micrometer accurate measurement of tooth wear / Bernhard Gierl in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 107-109 Titre : Micrometer accurate measurement of tooth wear : Application-specific in-situ transmission testing of injection molded plastic gears Type de document : texte imprimé Auteurs : Bernhard Gierl, Auteur ; Sebastian Hertle, Auteur ; Tobias Kleffel, Auteur ; Dietmar Drummer , Auteur Année de publication : 2019 Article en page(s) : p. 107-109 Langues : Anglais (eng) Catégories : Déformations (mécanique) Engrenages Essais dynamiques Mesure Transmission (mécanique) Usure (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : Until now, the dimensioning of plastic gear required the measurement of the tooth selectively and manually before, during and after a transmission test. A newly developed in-situ transmission test bench makes it possible to investigate tooth deformation and wear behavior quasi-continuously during the transmission test, thus reducing effort and operator influence. Non-linear behavior can also be better detected. Note de contenu : - The limits of conventional methods - High-resolution in-situ transmission testing - In-situ transmission testing versus manual measurement - Fig. 1 : Schematic representation of real and interpolated tooth width reduction during the running-in phase and stationary phase in accordance - Fig. 2 : In-situ transmission test bench with identification of the main components - Fig. 3 : Comparison of manually and in-situ measured gear tooth wear - Fig. 4 : Example of an in-situ measurement of tooth width decrease over test time En ligne : https://drive.google.com/file/d/1QVH_Y75BMQBqfaLWU8omVQ0VnJKADBSh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33176 [article]

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Fine channels, maximum efficiency / Andreas Wonisch in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 110-113 Titre : Fine channels, maximum efficiency : Improving conformal cooling with design, simulation, and processing know-how Type de document : texte imprimé Auteurs : Andreas Wonisch, Auteur ; Reinhard Jakobi, Auteur ; Leonhard Ullrich, Auteur ; Sebastian Gries, Auteur ; Chris Jones, Auteur ; Mark Hennebicque, Auteur Année de publication : 2019 Article en page(s) : p. 110-113 Langues : Anglais (eng) Catégories : Matières plastiques -- Refroidissement Moules d'injection Procédés de fabrication Simulation par ordinateur Systèmes de refroidissement Température Temps de cycle (production) Index. décimale : 668.4 Plastiques, vinyles Résumé : The production costs for complex injection molded parts not only depend on material costs but also to a considerable extent on cycle time. The cycle time is divided into the injection, holding pressure, (residual) cooling phases and the tool movements. The cooling phase takes up 60 to 90 % of cycle time, depending on the particular plastic material and part component. Adequate cooling can therefore reduce not only cooling time but also cycle time. Note de contenu : - Design and simulation of the conformal cooling system - Production of the additively manufactured core - Cycle time measurement for the molded parts - Fig. 1 : Mold inserts with straight drilled holes, conventional and additively manufactured conformal cooling channels - Fig. 2 : Heat development in the component for the conventional cooling concept simulated with Autodesk mold-flow - Fig. 3 : Molded part temperatures recorded with an IR camera directly after demolding and mold and molded part surface temperatures during the cooling phase (14.5 s after inejction) with conventional and conformal cooling - Fig. 4 : Molded part, after sufficiently long cooling time and inadequate cooling time - Table 1 : Comparison of experimentally determined temperatures and cycle times by the example of Ultramid A3K En ligne : https://drive.google.com/file/d/1XIag2W7y4Braf9ijJDNAK9zx8xJP54qa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33177 [article]

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Three-dimensional fiber skeleton / Björn Beck in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 114-116 Titre : Three-dimensional fiber skeleton : Local continuous fiber-reinforcement through 3D skeleton winding technology Type de document : texte imprimé Auteurs : Björn Beck, Auteur ; Jonathan Haas, Auteur ; Hussam Tawfik, Auteur Année de publication : 2019 Article en page(s) : p. 114-116 Langues : Anglais (eng) Catégories : Bobinage Charges (matériaux) Composites à fibres Composites à fibres de verre Fibres continues Polypropylène Structures tridimensionnelles Index. décimale : 668.4 Plastiques, vinyles Résumé : Thermoplastic injection molded parts can be reinforced with local continuous fibers in combination with metallic load application elements. This also makes them suitable for structural applications such as transverse control arms and transmission mountings. A 3D winding technology was tested for potential use in a large-scale production process. Note de contenu : - The 3D skeleton winding process - Test components for the material and process characterization - Fig. 1 : The three-step process chain of the 3D skeleton winding technology. A 6-axis industrial robot places the molten hybrid yarn around the load application elements - Fig. 2 : Demonstrator of a three-dimnensional structural component with metallic load application elements which allow applied loads to be transferred directly to the continuous fiber-reinforcement - Fig. 3 : Breaking forces of a simple pull loop with polypropylene (PP) depending on the number of windings. With six continuous fiber windings, the breaking load is already 500% higher - Fig. 4 : Breaking loads of a generic 3D structural component with polypropylene (PP) can be significantly increased by wound continuous fiber-reinforcements En ligne : https://drive.google.com/file/d/1Y011itayFFoudYJxXJRAGwc6cXFNVuRK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33178 [article]

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Putting hybrid components to the test / René Krämer in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 117-119 Titre : Putting hybrid components to the test : Test procedure for durability of metal components that have been injection-overmolded with PPS Type de document : texte imprimé Auteurs : René Krämer, Auteur Année de publication : 2019 Article en page(s) : p. 117-119 Langues : Anglais (eng) Catégories : Assemblages multimatériaux Composites à matrice organique Matières plastiques -- Moulage par injection Matières plastiques -- Propriétés thermiques Matières plastiques -- Surmoulage Métaux Polysulfures de phénylène Résistance thermique Index. décimale : 668.4 Plastiques, vinyles Résumé : The different thermal expansion of plastics compared with metals makes it difficult to design components that combine both materials. A new test procedure simulates in a time lapse the aging process of plastic-metal hybrid components when temperatures change. Using two contrasting test procedures, reliable information can be derived to assist in the designer. Note de contenu : - Varying thermal expansion - Two test blocks with different characteristics - Comprehensive tests provide indications - Fig. 1 : In this complexly formed high-voltage rail for electric vehicles, copper conductors were injection overmolded with PPS. Dut to the many conductors and various screw points, weld lines are reacted that become weak points when the temperature changes - Fig. 2 : The two test blocks that were developed for the heat cycle tests are made of metal and plastic. The version to the left was injection-overmolded from the side and shows weld lines ; the one to the righe was injection-overmolded from above with no weld lines - Fig. 3 : An overview of the thermal portfolio of properties of the plastics which were investigated. No compound delivered optimal results, but ype A675GS1B provides at least good, and, in many cases very good, results for all dimensions - Fig. 4 : Completed heat cycles by various compounds up to the onset of a crack. In each instance, the metal-plastic thermal expansionwas evaluated En ligne : https://drive.google.com/file/d/1y9OjQz4YB-_9ViPVNEpqdgADE1Lg_EQo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33179 [article]

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In the fast lane with plastics / Frank Peters in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 9 (09/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 9 (09/2019) . - p. 120-121 Titre : In the fast lane with plastics : 59 lightweight components for the body of the new electric city vehicle e.GO life Type de document : texte imprimé Auteurs : Frank Peters, Auteur ; Georg Dutzi, Auteur Année de publication : 2019 Article en page(s) : p. 120-121 Langues : Anglais (eng) Catégories : Automobiles -- Carrosseries Automobiles -- Pièces Matériaux -- Allègement Matières plastiques dans les automobiles Véhicules électriques Index. décimale : 668.4 Plastiques, vinyles Résumé : The e.GO Life is an affordable electric car for short-range transport. Starting as a development project at the RWTH Aachen University campus, the first cars of this type were delivered in the middle of this year. For this car, the engineers use plastic panels for the vehicle’s body. The large-sized body panels are thermoformed by the plastics-processing company Parat in close collaboration with the plastic sheet manufacturer Senoplast. Note de contenu : - Resistant exterior skin at an affordable price - From panel in piano black - Fig. 1 : One side of the electric vehicle produced from thermoformed plastic sheets, reinforcee at the back with a structural thermoformed part including reinforcing ribs. The elasticity of the ABS-PMMA sheets used absorbs minor damage such as parking knocks without permanent deformation - Fig. 2 :Structure of the co-extruded plastic sheets. For production quantities up to 30 000 units per year, thermoforming pays off in comparison with injection molding because of its cheaper mold costs, among other reasons En ligne : https://drive.google.com/file/d/1V4QnRAqm60Ve7iXEze_9IzpZawnNjGEk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33180 [article]

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