Modeling and characterization of fused deposition modeling tooling for vacuum assisted resin transfer molding process

Li, H.; Taylor, Gregory; Bheemreddy, Venkata; İyibilgin, Osman; Leu, Ming-Chuan; Chandrashekhara, K.

doi:10.1016/j.addma.2015.02.003

Cited by 28 publications

(21 citation statements)

References 8 publications

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“…This is a relevant point for application. In the literature there are increasing examples of the use of additive manufacturing in several fields ranging from microfluidics [11][12][13], tooling for composites [14,15] and injection molding [16]. Mixing epoxy blends with photocurable resins can open the field to novel formulation too if complex toughened epoxy blends area used [17,18] because this can be a suitable method to obtain the impact resistance of the printed specimens.…”

Section: Introductionmentioning

confidence: 99%

Epoxy Based Blends for Additive Manufacturing by Liquid Crystal Display (LCD) Printing: The Effect of Blending and Dual Curing on Daylight Curable Resins

et al. 2020

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Epoxy-based blends printable in a Liquid Crystal Display (LCD) printer were studied. Diglycidyl ether of bisphenol A (DGEBA) mixed with Diethyltoluene diamine (DETDA) was used due to the easy processing in liquid form at room temperature and slower reactivity until heated over 150 ° C. The DGEBA/DETDA resin was mixed with a commercial daylight photocurable resin used for LCD screen 3D printing. Calorimetric, dynamic mechanical and rheology testing were carried out on the resulting blends. The daylight resins showed to be thermally curable. Resin’s processability in the LCD printer was evaluated for all the blends by rheology and by 3D printing trials. The best printing conditions were determined by a speed cure test. The use of a thermal post-curing cycle after the standard photocuring in the LCD printer enhanced the glass transition temperature T g of the daylight resin from 45 to 137 ° C when post-curing temperatures up to 180 ° C were used. The T g reached a value of 174 ° C mixing 50 wt% of DGEBA/DETDA resin with the photocurable resin when high temperature cure cycle was used.

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Section: Introductionmentioning

confidence: 99%

Epoxy Based Blends for Additive Manufacturing by Liquid Crystal Display (LCD) Printing: The Effect of Blending and Dual Curing on Daylight Curable Resins

et al. 2020

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“…Fewer papers described the fundamentals about this application of FDM. Li et al . discussed in detail the characterization of material properties requirements and modeled the behavior for the use of Ultem 9085 as tooling materials for vacuum‐assisted resin transfer molding process.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Plastics: An Efficient Approach for Composite Tooling

Tosto

Latteri

Pergolizzi

et al. 2020

Macromolecular Symposia

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Additive manufacturing (AM) is increasingly used in different applications ranging from prototyping to the production of functional parts. One particular case is represented by the production of tooling for composites. The choice of AM techniques can be oriented both to the production of durable and removable tooling depending on composite part geometry. The development of sacrificial removable tooling for hollow composite air ducts is the main focus of this paper. The use of AM techniques is compared to the standard production approach using autoclave molding with a stainless steel mold as production technique. The different processing approaches are compared in terms of cost, production parameters, and of the final properties of the composites obtained. The use of soluble tooling shows clearly some benefits in terms of cost savings (i.e., 30%) and production time (i.e., 25%). However, the tooling removal technique outlines some drawbacks in terms of the final glass transition temperatures of the composite materials that was reduced to about 16°C after 6 h treatment.

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“…Combining FRP materials with the possibilities of AM offers a number of opportunities for the design and manufacturing of individualized, high-performance lightweight structures. These have been examined, e.g., in the context of layup tooling (Love et al 2014;Li et al 2015;Schniepp 2016) or lightweight applications with added functionalities such as AM honeycombs (Riss, Schilp & Reinhart 2014) or load introduction elements (LIE) (Türk, Klahn & Meboldt 2015). Studies that combine AM with FRP for OPE devices such as knee prostheses exist, but they focus mainly on the manufacturing route (Türk et al 2018b).…”

Section: Introductionmentioning

confidence: 99%

“…2014; Li et al. 2015; Schniepp 2016) or lightweight applications with added functionalities such as AM honeycombs (Riss, Schilp & Reinhart 2014) or load introduction elements (LIE) (Türk, Klahn & Meboldt 2015). Studies that combine AM with FRP for OPE devices such as knee prostheses exist, but they focus mainly on the manufacturing route (Türk et al.…”

Section: Introductionmentioning

confidence: 99%

Individualized lightweight structures for biomedical applications using additive manufacturing and carbon fiber patched composites

et al. 2019

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Combining additive manufacturing (AM) with carbon fiber reinforced polymer patched composites unlocks potentials in the design of individualized, lightweight biomedical structures. Arising design opportunities are geometrical individualization of structures using the design freedom of AM and the patient-individual design of the load-bearing components employing carbon fiber patch placement. To date, however, full exploitation of these opportunities is a complex recurring task, which requires a high amount of knowledge and engineering effort for design, optimization, and manufacturing. The goal of this study is to make this complexity manageable by introducing a suitable manufacturing strategy for individualized lightweight structures and by developing a digitized end-to-end design process chain, which provides a high degree of task automation. The approach to achieve full individualization uses a parametric model of the structure which is adapted to patients’ 3D scans. Moreover, patient data is used to define individual load cases and perform structural optimization. The potentials of the approach are demonstrated on an exoskeleton hip structure. A significant reduction of weight compared to a standard design suggests that the design and manufacturing chain is promising for the realization of individualized high-performance structures.

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Modeling and characterization of fused deposition modeling tooling for vacuum assisted resin transfer molding process

Cited by 28 publications

References 8 publications

Epoxy Based Blends for Additive Manufacturing by Liquid Crystal Display (LCD) Printing: The Effect of Blending and Dual Curing on Daylight Curable Resins

Epoxy Based Blends for Additive Manufacturing by Liquid Crystal Display (LCD) Printing: The Effect of Blending and Dual Curing on Daylight Curable Resins

Additive Manufacturing of Plastics: An Efficient Approach for Composite Tooling

Individualized lightweight structures for biomedical applications using additive manufacturing and carbon fiber patched composites

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