High-speed compression moulding of CFRTP/AFRTP hybrid composites using an electromagnetic induction heating system

Tanaka, Kiyofumi; Yamada, Misuzu; Kohashi, Norio; Katayama, Tsutao

doi:10.2495/hpsm100141

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…As a result, blocked, grafted and crosslinked polymer is formed. 9,10 Under certain temperature and pressure conditions, thermoplastic powders melt and became a kind of viscous flow state resin which has mobility. The melt resin extended and permeated among regenerated thermosetting plastic powders.…”

Section: Reshape Processmentioning

confidence: 99%

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Regeneration and recycling of waste thermosetting plastics based on mechanical thermal coupling fields

Liu

Song

et al. 2014

Int. J. Precis. Eng. Manuf.

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In view of the present situation that the recovery of waste thermosetting plastics and products is difficult and the utilization rate is low, regeneration mechanism, regeneration methods and recycling process of waste thermosetting plastics under mechanical thermal coupling fields are proposed. Regeneration powders of Thermosetting Phenolic plastic are obtained by mechanochemical activated regeneration methods, the molecular structure, properties and crosslink density of phenol regeneration materials are analyzed. Analysis results show that network crosslinked molecular structure was destroyed, reactive groups produced and the crosslink density decreased. The activity of regeneration powders was reinforced and its plasticity was also improving, so the utilization rate was improved. Regeneration composite plastics were manufactured by hot press molding or extrusion compression molding. The microstructure of regeneration composite plastics was analyzed, and its mechanical strength was tested. Results showed that the tensile strength and bending strength of samples (weight ratio ≥ 50%) respectively exceed 15.88 MPa and 33.49 MPa. At last process parameters for regeneration effects were discussed, and these parameters were optimized. When particle size was 80 mesh (size ≤ 0.18 mm), quality proportion was 50~70%, pressure was 10Mpa, heating temperature was 180~190 o C, the optimal effects for regenerated composite were achieved.

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Section: Reshape Processmentioning

confidence: 99%

“…8,9 An effective way to recycle is taking active regenerated powder as the main ingredient, using thermoforming or extrusion forming to produce composite plastic products. Reshape can not only effectively recycle wasted thermosetting plastic, but also improve recycling rate.…”

Section: Reshape Processmentioning

confidence: 99%

Regeneration and recycling of waste thermosetting plastics based on mechanical thermal coupling fields

Liu

Song

et al. 2014

Int. J. Precis. Eng. Manuf.

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“…However, due to its low energy absorption and long production cycle time, CFRP cannot be widely used in ordinary vehicles. Tanaka et al [33] found that the use of hybrid CFRP materials can improve the above shortcomings. Cheon et al [34] also reported that carbon/aramid hybrid composites had better stab resistance performances compared to the CFRP, especially the [C8/A8] hybrid composite, which had the best stab resistance without penetration.…”

Section: Introductionmentioning

confidence: 99%

Study on Burr Formation and Tool Wear in Drilling CFRP and Its Hybrid Composites

Lee

Song

2021

Applied Sciences

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As contemporary emerging materials, fiber-reinforced plastics/polymers (FRP) are widely used in aerospace automotive industries and in other fields due to their high strength-to-weight ratio, high stiffness-to-weight ratio, high corrosion resistance, low thermal expansion and other properties. Drilling is the most frequently used process in industrial operation for polymer composite laminates, owing to the need for joining structures. However, it is a great challenge for operators to drill holes in FRP materials, due to the non-homogenous and anisotropic properties of fibers. Various damages, such as delamination, hole shrinkage, and burr and tool wear, occur due to the heterogeneous and anisotropic nature of composite laminates. Therefore, in this study, carbon fiber reinforced polymer (CFRP)/aramid fiber reinforced polymer (AFRP) hybrid composites (C-AFRP) were successfully synthesized, and their drilling characteristics, including burr generation and tool wear, were also mainly investigated. The drilling characteristics of CFRP and C-AFRP were compared and analyzed for the first time under the same operating conditions (cutting tool, spindle speed, feed rate). The experimental results demonstrated that C-AFRP had higher tensile strength and good drilling characteristics (low thrust and less tool wear) compared with CFRP. As a lightweight and high-strength structural material, C-AFRP hybrid composites have great potential applications in the automobile and aerospace industries after the slight processing of burrs generated during drilling.

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“…In this study, the development of new molding method is focused on. Recently, high-speed compression molding process of CFRTP by means of electromagnetic induction heating system was proposed [5][6][7]. In this system, when a heat targets become larger, necessary coils surrounding a molding die also become larger.…”

Section: Introductionmentioning

confidence: 99%

Proximity heating of CFRTP molding dies by using high-frequency direct current

Tanaka

Sue

Iwamoto

et al. 2014

WIT Transactions on the Built Environment

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In the automobile industry, it is required to reduce the weight of cars for better fuel consumption. Recently, Carbon Fiber Reinforced Thermoplastics (CFRTP) are expected to be used for lightweight component parts. However, the cost of CFRTP is so high that the use of CFRTP is barely applied in the automobile industry. In order to lower the cost of CFRTP, simple equipment and low consumed power are necessary. High-frequency direct resistance heating to CFRTP molding dies becomes possible to solve these issues. High-frequency direct resistance heating is a method that alternating current is directly applied to a metal, and metal surface is heated by skin effect. When opposite directions of an alternating current flow in a pair of metal sections which face each other with a small gap, the proximity effect also promotes the concentration of current density on proximal surfaces of the metal and heats the metal surface intensively by joule heat. By applying high-frequency direct resistance heating to CFRTP molding, cost reduction as well as simplification of the facilities can be expected. In this study, in order to apply high-frequency direct resistance heating to CFRTP molding die, the effects of the proximity effect on the mold are evaluated to clarify the heating characteristics and conditions of the proximity effect, and the applicability of CFRTP molding is discussed. The experimental result reveals that the proximal surfaces can be heated by proximity effect.

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High-speed compression moulding of CFRTP/AFRTP hybrid composites using an electromagnetic induction heating system

Cited by 6 publications

References 5 publications

Regeneration and recycling of waste thermosetting plastics based on mechanical thermal coupling fields

Regeneration and recycling of waste thermosetting plastics based on mechanical thermal coupling fields

Study on Burr Formation and Tool Wear in Drilling CFRP and Its Hybrid Composites

Proximity heating of CFRTP molding dies by using high-frequency direct current

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