Automated profile preforming for structural components

Fauster, Ewald; Schillfahrt, Christian; Hueber, Christian; Schledjewski, Ralf

doi:10.1515/secm-2015-0377

Cited by 6 publications

(8 citation statements)

References 28 publications

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“…The combination of such technologies with pultrusion systems can bring even higher efficiency with even more geometric possibilities and potentials regarding fiber orientation. [ 226 ]…”

Section: Future Scopementioning

confidence: 99%

An overview on current manufacturing technologies: Processing continuous rovings impregnated with thermoset resin

et al. 2021

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The demand for products made of fiber‐reinforced polymer composites (FRPC) is constantly growing. These lightweight products are characterized by high stiffness, high tensile strength, and high service life. FRPC processes that employ thermoset‐impregnated continuous rovings are easily automated and provide the products with the highest unidirectional tensile strength. A critical disadvantage of continuous fiber‐reinforced polymers is caused by relatively high production costs. Among others, three main factors contribute to these production costs: (1) material costs, especially when carbon fibers are used, (2) costs for manufacturing semi‐finished products, such as textiles or preimpregnated fabrics, and (3) costs for waste occurring along the entire chain of process steps. In this context, one group of processes shows outstanding characteristics: processes in which rovings are in situ impregnated with a thermoset resin and then directly processed. Wet filament winding and pultrusion are the most popular but not the only representatives of this group. For all these processes, in situ impregnation is the key element, and various technologies have been developed for this purpose, each with its own unique fluid‐mechanical effects on rovings. A fundamental understanding of these effects is crucial to achieve products of the utmost quality. The paper at hand provides an overview of manufacturing processes that employ in situ impregnation of continuous rovings, specifically focusing on impregnation technologies. On this basis, phenomenological models describing the effects on the rovings during processing (impregnation, tension, and spreading) are reviewed.

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“…The combination of such technologies with pultrusion systems can bring even higher efficiency with even more geometric possibilities and potentials regarding fiber orientation. [ 226 ]…”

Section: Future Scopementioning

confidence: 99%

An overview on current manufacturing technologies: Processing continuous rovings impregnated with thermoset resin

et al. 2021

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“…Automated and robotic technologies that have found applications in composites manufacturing (cutting, stacking, placing, etc.) have been reviewed by Fauster et al [85]. Finally, textile defects are largely associated to the textile inherent tendency to deform (i.e.…”

Section: Repeatabilitymentioning

confidence: 99%

Liquid composite molding reproducibility in real-world production of fiber reinforced polymeric composites: a review of challenges and solutions

Konstantopoulos

Hueber

Antoniadis

et al. 2019

Advanced Manufacturing: Polymer & Composites Science

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Liquid composite molding (LCM) suffers from multiple factors that contribute to pronounced uncertainty of process characteristics. This results in compromised reproducibility which is associated to high scrap or the unpredictable behavior of approved parts. However, LCM is still attractive for Fiber-reinforced polymeric composites (FRPC) production due to its economic advantage (i.e. in relation to Autoclave), the capability of some of its variants to produce high performance parts and its potential for process optimization. This review analyzes each uncertainty with respect to its origins and its impact in part or process, based on a combination of past literature and original numerical results. The possible methods to counteract uncertainties are critically discussed, with an eye on both the scientific and feasibility (technical/economical) aspects. The overall aim is to provide to future LCM implementations a roadmap of the most critical challenges and solutions regarding the establishment of a reproducible process.

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“…Since the 1970s, the use of composite materials, especially fiber-reinforced polymer composites (FRPC), has become increasingly widespread in various industrial sectors, such as aerospace, automotive, energy, or sports industries. It happened due to their superior properties, particularly the light weight and high performance of mechanical properties compared to steel and other metals [ 1 , 2 , 3 , 4 , 5 ]. However, the further distribution of such materials to other sectors of industry is hindered by their high cost, since the initial autoclave/prepreg technology is highly labor intensive and requires a lot of energy for production of composites [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…Another interesting application of the binders is their use in automatic laying out of the preform [ 2 , 22 ]. Thus, for example, a binder in the powder form applied to filler can give filler tapes which can stick together with each other under some pressure and heating.…”

Section: Introductionmentioning

confidence: 99%

“…In 1998, in the book Resin Transfer Molding for Aerospace Structures [ 7 ], binders, their types, as well as the process of applying binders to the fillers and the process of obtaining preforms from bindered fabrics were briefly reviewed. Binders were also mentioned in the review [ 2 ] devoted to automated preforming processes and some other works devoted to cost effective composite productions [ 27 , 28 ]. However, there have been no comprehensive reviews on this topic so far.…”

Section: Introductionmentioning

confidence: 99%

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Binders Used for the Manufacturing of Composite Materials by Liquid Composite Molding

Terekhov

Chistyakov

2021

Polymers

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Binders, or tackifiers, have become widespread in the production of new composites materials by liquid composite molding (LCM) techniques due to their ability to stabilize preforms during laying-up and impregnation, as well as to improve fracture toughness of the obtained composites, which is very important in aviation, automotive, ship manufacturing, etc. Furthermore, they can be used in modern methods of automatic laying of dry fibers into preforms, which significantly reduces the labor cost of the manufacturing process. In this article, we review the existing research from the 1960s of the 20th century to the present days in the field of creation and properties of binders used to bond various layers of preforms in the manufacturing of composite materials by LCM methods to summarize and synthesize knowledge on these issues. Different binders based on epoxy, polyester, and a number of other resins compatible with the corresponding polymer matrices are considered in the article. The influence of binders on the preforming process, various properties of obtained preforms, including compaction, stability, and permeability, as well as the main characteristics of composite materials obtained by various LCM methods and the advantages and disadvantages of this technology have been also highlighted.

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Automated profile preforming for structural components

Cited by 6 publications

References 28 publications

An overview on current manufacturing technologies: Processing continuous rovings impregnated with thermoset resin

An overview on current manufacturing technologies: Processing continuous rovings impregnated with thermoset resin

Liquid composite molding reproducibility in real-world production of fiber reinforced polymeric composites: a review of challenges and solutions

Binders Used for the Manufacturing of Composite Materials by Liquid Composite Molding

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