[article]
| 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 Freeformer |
| En ligne : |
https://drive.google.com/file/d/1vMhQ_aA8yyYUq2M40XOX8KaPsTG-2BQk/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31533 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 11 (11/2018) . - p. 15-21
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Droplets to the beat of milliseconds in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)
