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KUNSTSTOFFE INTERNATIONAL . Vol. 108, N° 11Mention de date : 11/2018Paru le : 20/11/2018 |
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Ajouter le résultat dans votre panierLayer-by-layer from granulate to part / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
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Titre : Layer-by-layer from granulate to part : High-speed additive manufacturing of fiber-reinforced structural parts Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Celina Hellmich, Auteur ; Nicolai Lammert, Auteur ; Jan Dormanns, Auteur ; Jürgen Rinderlin, Auteur ; Thilo Stier, Auteur ; Josef Zgrzebski, Auteur Année de publication : 2018 Article en page(s) : p. 6-9 Langues : Anglais (eng) Catégories : Composites à fibres
Composites à fibres -- Propriétés mécaniques
Impression tridimensionnelle
Impression tridimensionnelle -- Appareils et matériels
Polyamide 6Index. décimale : 668.4 Plastiques, vinyles Résumé : A new joint venture is getting a hybrid manufacturing cell ready for market. A screw-based plasticizing unit is mounted on a 6-axis robot. The novel processing approach facilitates additive manufacturing of structural parts from granular and fiber-reinforced standard compounds. Note de contenu : - Award-winning interior concept study
- Hybrid production concept, new areas of application
- Suitability of qualified series materials
- New partnership paves the way to industrialization
- Fig. 1 : IKV's hybrid production cell in live operation at the Hanover Faire 2018, as it produces a structural part at a production speed of 6g/min
- Fig. 2 : Mechanical properties of additively manufactured parts made from Akromid B3 ICF 20 PA6 cmpound depending on substrate temperature
- Fig. 3 : Pilot plant with exchangeable construction bed module for application-oriented use as presented at the FakumaEn ligne : https://drive.google.com/file/d/14sSs9k9eJ__XLlCHohx0z0QxUZXkokuz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31530
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Code-barres Cote Support Localisation Section Disponibilité 20331 - Périodique Bibliothèque principale Documentaires Disponible Breeding ground for additive manufacturing / Ed Rousseau in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
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Titre : Breeding ground for additive manufacturing : Medical device developments at the brightlands chemelot campus Type de document : texte imprimé Auteurs : Ed Rousseau, Auteur Année de publication : 2018 Article en page(s) : p. 10-12 Langues : Anglais (eng) Catégories : Implants médicaux
Impression tridimensionnelle
Orthèses
Polymères en médecine
Prothèses
Prothèses dentairesIndex. décimale : 668.4 Plastiques, vinyles Résumé : As part of a collaborative initiative, the Brightlands Chemelot Campus focuses on the development and implementation of advanced additive manufacturing technologies. Three current biomedical projects illustrate the multiple possibilities for start-up companies in this market. Note de contenu : - Patient-specific polyamide Scoliosis Braces
- Patient-specific Dental design
- Personalized breast prostheses by means of smart data
- Campus meets important criteria
- Fig. 1 : The patient-specific 3D printed scoliosis brace is made-to-measure using advanced image and smart data processing
- Fig. 2 : Scanned printed and fitted within one day : denture made of different materials to eliminate the fake look of conventional solutions
- Fig. 3 : Using "smart data" and a special scanning process, personalized breast prosteses can be created by additive manufacturingEn ligne : https://drive.google.com/file/d/1ivR9bZJ_Gs-G-SFGYqtXf6np--4CqSTy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31531
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Code-barres Cote Support Localisation Section Disponibilité 20331 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Design in the fast lane : Audi shortens release cycles with full-color multi-material 3D printing Type de document : texte imprimé Année de publication : 2018 Article en page(s) : p. 13-14 Langues : Anglais (eng) Catégories : Assemblages multimatériaux
Automobiles -- Eclairage
Impression tridimensionnelle
Matières plastiques dans les automobilesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Audi expects significant reduction in prototyping lead times for tail light covers by using a full color 3D printer. Compared to traditional methods, the turnaround times should be halved. The Stratasys J750 makes it possible to produce transparent, multi-colored parts meeting texture and color-matching requirements of Audis stringent design approval process . Note de contenu : - Realistic color reproduction accelerates development process
- Fig. : The Audi Plastics 3D printing center use the J750 3D printer to produce transparent, multi-colored tail light covers in a single step
- Fig. : Audi will almost halve turnaround times in the prototype production of tail light coversEn ligne : https://drive.google.com/file/d/1pFyu5UjizId1jRQIH6nGEGZS2JnL9KRi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31532
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Code-barres Cote Support Localisation Section Disponibilité 20331 - Périodique Bibliothèque principale Documentaires Disponible Droplets to the beat of milliseconds / Agnes Kloke in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
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Titre : Droplets to the beat of milliseconds : Arburg plastic freeforming : current investigations on part optimization Type de document : texte imprimé Auteurs : Agnes Kloke, Auteur Année de publication : 2018 Article en page(s) : p. 15-21 Langues : Anglais (eng) Catégories : Impression tridimensionnelle Index. décimale : 668.4 Plastiques, vinyles Résumé : Arburg Plastic Freeforming (APF) is based on qualified original materials in the form of plastic granulates as used in injection molding. Current researches illuminate influences on the resulting part quality of this additive process. Because the open system permits adaptation of the parameters, the mechanical and geometric properties of the parts can be optimized in a targeted manner. In this way, tensile strengths and part densities comparable to those of injection molded parts can be achieved. Note de contenu : - Influence of machine parameters on droplet shape and aspect ratio
- Qualification, selection and preparation of material
- Slicing defines the layer details
- Influences of the orientation during layering and the degree of filling
- Industrialisation functional parts made from original materials
- Two-component parts
- Customized individual parts and functional materials
- Cost-effective production of small volume batches
- Integrating customer requirements into added value and freeformer in the process chain
- Fig. 1 : The APF process is based on plstic granulates. The qualified original material is melted in a plasticizing unit and discharged via a nozzle in the form of droplets
- Fig. 2 : The droplet geometry is determined by the nozzle size, the discharge rate per droplet and the flow properties of the material. Test cubes are produced to precisely set the aspect ratio (W/H ratio)
- Fig. 3 : Compared to injection molded parts with optimized process parameters, achievable tensile strength of APF samples of PC (Makrolon 2805, 200 µm layer height) are dependent on the build direction
- Fig. 4 : Different shore A hardnesses can be achieved by changing the aspect ratios (W/H) with unchanged parameter setting (TPE : Medalist, specified as shore A hardness 30)
- Fig. 5 : Stress/strain curves for tensile samples produced with different aspect ratios made from the material Medalist MD-12130H
- Fig. 6 : If the droplets are extremely densely packed, transparent test plates made from PMMA can be manufactured using the APF process
- Fig. 7 : Air ducts from a specially approved PC for aerospace applications, e.g., for installation over passenger seats in airplane
- Fig. 8 : Additively manufactured cable clips made from semi-crystalline standard PP are characterized by delicate structures and the click effect typical of injection molded parts
- Fig. 9 : Complete module additively manufactured in a fully assembled state : an articulated rope pulley made from bio-PA has a load-bearing capacity of 100kg
- Fig. 10 : By way of example, a Free-former produced an individually adapted cranial bone implant made from medical grade PLLA granulate
- Fig. 11 : Interesting applications for the APF process are two-component gripper fingers made from PA and TPE
- Fig. 12 : The APF process is the more cost-effective is the more cost-effective alternative for the 1200 spacers installed in Arburg injectionmolding machines annually. The break-even point for injection molding is a unit volume of 5540. Depending on part size and geometry, the break-even point shifts
- Fig. 13 : During the pilot project conducted at a Lego Store, consumers were able tohave individualized key fobs produced with the aid of the Freeformer
- Fig. 14 : In a fully IT-networked and comprehensively automated production line for individualized high-volume parts, a seven-axis robotic system is used to feed the build chamber of the FreeformerEn ligne : https://drive.google.com/file/d/1vMhQ_aA8yyYUq2M40XOX8KaPsTG-2BQk/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31533
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Code-barres Cote Support Localisation Section Disponibilité 20331 - Périodique Bibliothèque principale Documentaires Disponible Hot runner balancing enters production / Erwin König in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
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Titre : Hot runner balancing enters production : Proven method for automatic balancing of multi-cavity hot runner molds with standard connection to industry 4.0-systems Type de document : texte imprimé Auteurs : Erwin König, Auteur ; Christopherus Bader, Auteur Année de publication : 2018 Article en page(s) : p. 22-25 Langues : Anglais (eng) Catégories : Canaux chauffants
Contrôle technique
Empreinte (moule d'injection)
Industrie 4.0Le 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.
Matières plastiques -- Moulage par injection
Régulateur proportionnel intégral dérivéUn régulateur PID ou correcteur PID (pour « proportionnel intégral dérivé ») est un organe de contrôle permettant d’effectuer une régulation en boucle fermée d’une grandeur physique d'un système industriel ou « procédé » (voir Automatique). C’est le régulateur le plus utilisé dans l’industrie, et il permet de régler un grand nombre de grandeurs physiques.Index. décimale : 668.4 Plastiques, vinyles Résumé : Competitive advantages and growing cost pressures are behind the relentless drive to keep raising production line output. The key elements for achieving this are multi-cavity mold designs, such as can be realized with stack and cube molds. The growing demands on processes, especially those involving high numbers of cavities, can be met by using smart control systems that deliver consistently high product quality, even under fluctuating input conditions. Note de contenu : - Partly disagreement over balancing fundamentals
- Practical application with a stack mold
- The finer points of automatic hot runner balancing
- Different control strategies
- Fig. 1 : hereas the time offsets between the cavity pressure signals at various pressure levels differ in both the unbalanced and the balanced states, there is virtually no time offset for the temperature rises in the balanced state
- Fig. 2 : View inside the stack mold. The rack and the melt guide tube are clearly visible
- Fig. 3 : 8-folt hot runner system for the stack mold with bushing, manifold and nozzles from Männer
- Fig. 4 : Balancing with different PID parameter settings and control strategies. The diagram shows the temporal change in hot runner balancing based on the balancing time offset between the automatically determined temperature rises in the various cavities. The trend chart reveals the inertia of the various settings, with the smallest deviation representing the best possible balancing
- Fig. 5 : While a balancing time offset of 0.1 s was recorded for manual optimization, a time offset of just 0.01 s was achieved with automatic balancing. For optimal balancing, the nozzle tempera¬tures had to be adjusted accordinglyEn ligne : https://drive.google.com/file/d/1Im6ttLpesT_Skd3nHsljVl4_3wrrVvpU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31534
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Titre : Modular safety : Newly developed modular safety guarding for flexible installation Type de document : texte imprimé Auteurs : Gerhard Dimmler, Auteur ; Wolfgang Höglinger, Auteur ; Klaus Karner, Auteur ; Horst Geiblinger, Auteur ; Deborah Lidauer, Auteur Année de publication : 2018 Article en page(s) : p. 26-27 Langues : Anglais (eng) Catégories : Construction modulaire
Matières plastiques -- Moulage par injection -- Appareils et matériel
Sécurité du travail
Travailleurs -- ProtectionIndex. décimale : 668.4 Plastiques, vinyles Résumé : The injection molding machine manufacturer Engel is improving employee safety in plastics processing with its newly developed safety guarding according to EN ISO 14120. Its modular concept supports straightforward configuration and installation. Thanks to the extensive selection of safety panels and functional elements such as control cabinets, cable ducts, and swivel and sliding doors, individual layouts can also be realized at reasonable cost. Note de contenu : - Consistent functional design
- Simplified maintenance and upkeep
- Voluntary technical testing
- Figures : The new modular safety guarding according to EN ISO 14120 improves safety in production - The modular concept supports straightvorward configuration and installation - Engel has already equipped an initial system for composites processing in the automotibile supplier industry with the new safety guardingEn ligne : https://drive.google.com/file/d/1oCcUQIGnKhD4pah4vgZe2aonc7g1YlFT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31535
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Code-barres Cote Support Localisation Section Disponibilité 20331 - Périodique Bibliothèque principale Documentaires Disponible "With system integration, fewer errors occur" / Fabian Diehr in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
[article]
Titre : "With system integration, fewer errors occur" : Christian Götze (GKTool) and Moreno Carvani (HRSflow) about cost-efficient production through integrated mold technology Type de document : texte imprimé Auteurs : Fabian Diehr, Personne interviewée ; Moreno Carvani, Personne interviewée Année de publication : 2018 Article en page(s) : p.28-32 Langues : Anglais (eng) Catégories : Décoration dans le moule
Efficience dans l'industrie
Matières plastiques -- Moulage par injection
Matières plastiques dans les automobiles
PolypropylèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : Flexibilization of production, lightweight design, functional surfaces, increasing product customization, consistently low reject rates etc. – the OEM wish list is becoming longer and longer. While the OEMs are the main drivers in the injection molding segment, their mounting demands are challenging Tier 1 suppliers, mold makers and systems suppliers alike. For an interview, we met with specialists from GKTool and HRSflow, for whom the search for new solutions is daily routine. The topic is integration – of ideas, processes and system partners. Note de contenu : - Fig. 1 : The manufacturing process includes the structuring of the decoration in the tool, the back-molding in the MuCell process and the trimming to a finished component
- Fig. 2 : It is even possible to replicate the twist in the yarn : close-up of the DecoJect door liner
- Fig. 3 : Flexflow allows injection molders to work with a larger process window. With the aid of a servo-driven system, pressures and flow rates can be controlled easily, accurately and flexibly via the needle valves during the entire injection molding process
- Fig. 4 : The Claza demonstrator was developed by the firm nolax for the start-up of the same name. A film is backmolded directly with PP or recycled PP, the part comes out finished from the tool
- Fig. 5 : Xith the in-mold edge-folding and cutting process (patent pending : GKTool), the film with a metal or lacquer look is pulled over to the reverse side of the part during backmolding, and is trimmed there to its final size
- Fig; 6 : A 7-fold Flexflow system was used to replicate a Volvo rear spoiler toolEn ligne : https://drive.google.com/file/d/1wn2e6bzYDxfEAV3k1q6hGlfUZ8n9iyfw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31536
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Code-barres Cote Support Localisation Section Disponibilité 20331 - Périodique Bibliothèque principale Documentaires Disponible Process safe and cleanroom suitable / Martin Ortgies in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
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Titre : Process safe and cleanroom suitable : Männer Lands with the needle-operated e-plate unit in the medical project business Type de document : texte imprimé Auteurs : Martin Ortgies, Auteur Année de publication : 2018 Article en page(s) : p. 33-35 Langues : Anglais (eng) Catégories : 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.
Matériaux -- Application-dosage
Matériel médical
Matières plastiques -- Moulage par injection
Matières plastiques -- Moulage par injection -- Appareils et matériel
Polymères en médecine
Salles blanches
Technologie médicaleIndex. décimale : 668.4 Plastiques, vinyles Résumé : Due to its ability to produce high-precision plastic components, electrically driven pin actuation is increasingly being used in medical, pharmaceutical, and technical fields. For devices that need to be medically certified, component stability and accuracy are particularly crucial to ensuring the safety of drug delivery. Note de contenu : - Documented process safety
- Precision of parts is preriquisite for exact dosage
- Cleanroom quality due to electric power
- Advantages in ongoing operations
- Limits as basis for predictive maintenance
- Fig. 1 : The e-plate ensures a uniform filling behavior of the cavities through synchronous movements of the needles
- Fig. 2 : The customizable path profile with defined speeds and acceleration rates, as well as specification of the precise pin position can all be checked and adjusted at any point in the process
- Fig. 3 : 16 cavity singleface mold for production of the "Bodys" with electrically driven pin actuation plate e-plate top right
- Fig. 4 : MoldMind II records process data from the injection mold tamper-proof, monitors and analyzes key process parameters in the production process and issues an alarm signal at critical valuesEn ligne : https://drive.google.com/file/d/1GW0ddKFsdM4El3dT43Zj3iIdC2PwXdUv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31537
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Code-barres Cote Support Localisation Section Disponibilité 20331 - Périodique Bibliothèque principale Documentaires Disponible Declaring war on quench marks / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
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Titre : Declaring war on quench marks : The correct plug geometry makes the wall thickness more homogenous Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Dennis Balcerowiak, Auteur Année de publication : 2018 Article en page(s) : p. 37-41 Langues : Anglais (eng) Catégories : Bouchons en matières plastiques
Conception technique
Matériaux -- Allègement
Matériaux -- Epaisseur
Matières plastiques -- ThermoformageIndex. décimale : 668.4 Plastiques, vinyles Résumé : In addition to the choice of forming process parameters, the design of the pre-stretching plug in particular affects the wall thickness distribution. By directing plastic material into areas where thin spots develop during forming when using only compressed air, the material consumption and therefore weight can be reduced while maintaining a consistent component quality, simultaneously reducing the risk of quench mark formation during production. Note de contenu : - Plug-assisted thermoforming
- Development and design of pre-stretching plug geometries
- Studies of the stretching distance and timing of compressed air activation
- Influence of the plug geometry
- Fig. 1 : Tool Geometry, plug dimensions, and measuring path to evaluate the produced cups. The invervals between the measuring points are 5 mm
- Fig. 2 : Wall thickness distribution of a cup produced without plug stretching and calculated, theoretical, homogenous wall thickness of a cup with the same mass (red line). For improved clarity, the respective values across from each other in the component have been averaged and shown on one cup half in the following diagrams
- Fig. 3 : Plug geometries : these shapes were developed to analyze the influence on the wall thickness distribution
- Fig. 4 : Preliminary investigation : the influence of the compressed air activation timing is low, the plug stretching distance on the other hand has a greater influence on the wall thickness distribution
- Fig. 5 : The plug edge radius with a constant wall incline mainly exhibits influences on the floor of the component
- Fig. 6 : Variation of the plug wall angles with a constant plug edge radius shows a considerable influence on the wall thickness distribution
- Fig. 7 : Using a cone-shaped, pointed plug produces a heterogeneous wall thickness distributionEn ligne : https://drive.google.com/file/d/1m0zPYnoyQaXxfy-wLzHlFUY0fkyjaK2g/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31538
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Titre : Strong cohesion : New filler linking enhances the properties of PTFE compounds Type de document : texte imprimé Auteurs : Robert Veenendaal, Auteur ; Michael Schlipf, Auteur Année de publication : 2018 Article en page(s) : p. 42-45 Langues : Anglais (eng) Catégories : Charges (matériaux)
Déformations (mécanique)
Essais dynamiques
Matières plastiques -- Propriétés mécaniques
Polytétrafluoréthylène
Résistance à la tractionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Although fluor-homopolymers already have high performance properties, they are difficult to modify selectively. This is due to the extremely stable chemical bonding of the polymer, which impedes the cohesion to additives. A new type of filler strengthens the bond between particles and plastic. Note de contenu : - Improved properties caused by matrix bonding
- Reduced deformation under compressive load
- Improvements in multiple respects
- Dynamic endurance
- Applications in oil production and vehicles
- Fig. 1 : The stress-strain diagram of newly developed PDR015/310 compared to TFM 3262 (contains 10% carbon fibers). Due to the good adhesion between polymer and filler particles PDR015/310 shows a significantly higher tensile strength
- Fig. 2 : The characteristics of PDR015/310 over a wide temperature range : the higher values for the complex module E* show the consistently higher rigidity of PDR015/310, even at extremely low and high temperatures
- Fig. 3 : Compression deformation at 15 MPa over 100 h. The significantly lower deformation of PDR 015/310 under load is the consequence of the solid incorporation of the filler into the polymer matrix
- Fig. 4 : Density, tensile strength and elongation show the improved properties of the newly developed PDR015/310 compared to previous products
- Fig. 5 : K-factor as a removal of a seal under defined friction conditions. Compared to TFM 3262 (contains 10 % carbon fibers) and TFM 3215 (contains 25 % carbon fibers), PDR015/310 is the com¬pound with the lowest abrasion according to ASTM-D 3702En ligne : https://drive.google.com/file/d/1Vy4oWAlYrq65ZowCAloRNyiIOibps9AD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31539
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Code-barres Cote Support Localisation Section Disponibilité 20331 - Périodique Bibliothèque principale Documentaires Disponible Digital preview of bio-based parts / Marco Neudecker in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
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Titre : Digital preview of bio-based parts : Injection molding simulation puts bioplastics on the road to industrial mass production Type de document : texte imprimé Auteurs : Marco Neudecker, Auteur ; Hans-Josef Endres, Auteur ; Andrea Siebert Raths, Auteur ; Renate Messing, Auteur ; Paul F. Filz, Auteur Année de publication : 2018 Article en page(s) : p. 46-49 Langues : Anglais (eng) Catégories : Bioplastiques
Gauchissement (matériaux)
Matières plastiques -- Moulage par injection
Simulation par ordinateur
TempératureIndex. décimale : 668.4 Plastiques, vinyles Résumé : It is difficult to use bioplastics in engineering parts due to a lack of processing data. However, these data are very important for making a change from conventional to bio-based plastics. They are essential for simulating process parameters and designing injection molds for economical processing. Note de contenu : - Compatibility of bioplastics for series applications
- Simulation versus reality
- Lower mold and demolding temperatures used
- Fig. 1 : The simulated warpage shows very significant differences for the investigated bioplastics. This material behavior is one of the big challenges for simulation
- Fig. 2 : In the simulation of the flow-front temperature, filling difficulties can be seen by the strong cooling of the melt in the keys
- Fig. 3 : In the first step, it was only investigated whether the simulation agreed with practice, without process optimization. Undulating structures and strong warpage occur at the surface of the material
- Fig. 4 : Simulation and practical result of a process, in which there is changeover to holding pressure at 97% mold filling. The keys are not completely filled in the front region
- Table 1 : Liste of the bioplastics investigated. The tests with Ingeo 32052D are presented in greater detail in the article
- Table 2 : The injection parameters from PLA nature works Ingeo 3052D from the simulation and after th eprocess optimization. Since the bio-based copolymer has a low crystallization rate, lower mold temperature should be set in practiceEn ligne : https://drive.google.com/file/d/1f1iZ9-OpnpIVVNuxdacYEC6LHFrOfJ2e/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31540
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 11 (11/2018) . - p. 46-49[article]Réservation
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