Compression Molding of Carbon Fiber Reinforced Thermoplastics Using Non-Woven Stitched Multi-Axial Cloth by Means of Induction Heating System

Tanaka, Kazuto; Kohashi, Norio; Kinoshita, Yasunori; Katayama, Tsutao; Uno, K.

doi:10.2472/jsms.58.642

Cited by 24 publications

(21 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CFRTP laminated materials were molded by the high-speed compression molding method [9]. As the molding condition: molding temperature was set at 280°C, molding pressure was set at 2 MPa and molding time was 60 s. As the reinforced materials, non-crimp stitched carbon fabrics (NCF, 300 g/m 2 , [0°/90°], Toho Tenax), which are PAN-based carbon fibers being stitched together by polyester sewing thread, were used.…”

Section: Methodsmentioning

confidence: 99%

Internal Damage Evaluation of CFRTP Cut by a Circular Saw

Tanaka¹,

Yamashiro²,

Katayama³

2017

Materials and Contact Characterisation VIII

Self Cite

View full text Add to dashboard Cite

In recent years, due to the serious environmental issues, the development of the gasoline mileage improvement technology has become essential in the automotive industry. Weight-saving of the car body can contribute to improving the gasoline mileage. CFRP (Carbon Fiber Reinforced Plastics) are widely used as structural material for airplanes, various kinds of sports gear and premium automobiles because of their low density and high performance in mechanical properties. In CFRP, CFRTP (Carbon Fiber Reinforced Thermoplastics) are expected to be used for lightweight component parts because of their high recycling efficiency and high productivity. Accordingly, a high-efficiency machining method of CFRTP has been needed; however, CFRTP are known as difficult-to-machine materials. Delamination and huge burrs are major problems in CFRTP cutting. Although a circular saw that can be used at high speed is usually used as a cutting tool, the internal damage of CFRTP resulting from machining has not been clarified yet. In this study, in order to evaluate the influence of cutting speed on the internal damage of CFRTP cut by circular saw, the internal damage depth and the temperature of specimens during cutting process were measured. The internal damage occurred by circular saw processing and the internal damage depth were decreased in the case of fast cutting speed. The temperature of the specimen was increased in the case of slow cutting speed because of the longer contact time of the circular saw with the specimen.

show abstract

Section: Methodsmentioning

confidence: 99%

Internal Damage Evaluation of CFRTP Cut by a Circular Saw

Tanaka¹,

Yamashiro²,

Katayama³

2017

Materials and Contact Characterisation VIII

Self Cite

View full text Add to dashboard Cite

show abstract

“…Polyamide 6 (Prototype, PA 6, Ube Industries, Ltd., Japan), which is processed into non-woven fabric by the melt blown method (Kuraray Co., Ltd., Japan) with weight per unit area at 50 g/m 2 , was used for the matrix in welding area. Specimens were molded by the high-speed compression molding method [12]. Non-crimp stitched carbon fabrics (NCF, 300 g/m 2 , [0°/90], Toho Tenax, Japan), that were PAN-based carbon fibers stitched together by polyester sewing thread, were used for the reinforced fabrics.…”

Section: Methodsmentioning

confidence: 99%

Influence of Laser Surface Treatment on the Tensile Shear Strength of Resistance Welded CFRTP

Tanaka¹,

Okamoto²,

Nakano³

et al. 2017

Materials and Contact Characterisation VIII

Self Cite

View full text Add to dashboard Cite

In the automotive industry, Carbon Fiber Reinforced Thermoplastics (CFRTP), which have advantages in terms of high toughness, high productivity and high recycling efficiency, are expected to be used for automotive parts. Although the composite materials allow the integral molding of complicated structure, assembly of the vehicle still needs a lot of joints such as bolts and rivets. These fastening methods cause the increase of weight and require holes that cause stress concentration. In the aircraft industry, the technique for welding of CFRTP by direct resistance heating to metal mesh has been applied. Although this fastening method needs no holes, there is a problem of delamination between the metal mesh and matrix. Meanwhile, the direct resistance welding has been developed, in which carbon fibers are used for heating elements. However, further improvement of strength and reduction of the bonding area to allow light weight structures are required. One of the methods enhancing the bonding strength is surface treatment of CFRTP. Laser ablation is an environmentally friendly process of surface treatment that is high in productivity. In this study, in order to evaluate the influence of laser ablation on tensile shear strength, laser ablation was applied to the surface of CFRTP under different conditions. The shear strength was the highest under the conditions of laser scanning in the fiber direction with lower laser power.

show abstract

“…The thicknesses of the laminates used in this study were 1.0 and 2.0 mm, and the fiber volume content was 50% and the density was 1.78 g/cm 3 . The short glass fiber reinforced polyamide 6 (PA6) pellet (1015GC3, UBE, Japan) was used for injection molding.…”

Section: Materials and Experimental Procedures 21 Materialsmentioning

confidence: 99%

“…Since fiber reinforced thermoplastic composite material (FRTP) have advantages in high-specific strength, high-specific modulus and recyclability, the demand for FRTP is increasing [1,2]. Many dedicated researches to realize the FRTP component parts, such as developments of high-speed molding process of FRTP [3,4] and formability evaluation of CFRTP [5] etc., have been carried out.…”

Section: Introductionmentioning

confidence: 99%

Press and injection hybrid molding of glass fiber reinforced thermoplastics

Tanaka¹,

Fujita²,

Katayama³

2015

WIT Transactions on Engineering Sciences

View full text Add to dashboard Cite

To obtain light-weight vehicles, which is one of the major solutions of the automotive industry to reduce CO 2 emissions, the use of fiber reinforced thermoplastic composite material (FRTP) has attracted much attention. For molding methods of FRTP, there are press molding using continuous fiber reinforced thermoplastics and injection molding using short or long fiber reinforced thermoplastics. Although injection molding can mold complex shapes, its mechanical property is not enough for the use as a structural material. On the other hand, press molding using continuous fiber reinforced thermoplastics is excellent in strength and elastic modulus, however, it is difficult to mold three-dimensional complex shapes. The novel molding technology, introduced in this paper, has been developed to gain new perspectives in FRTP by combining press molding and injection molding. This novel hybrid molding technology is suited to mold structural components with high-strength and high-stiffness. Although the interfaces between rib structures with short or long fiber reinforced thermoplastics and the laminated outer shell with the continuous fiber reinforced thermoplastic laminate, the interfacial properties has not been clarified yet. In this study, press and injection hybrid molding that can mold products of complex shapes was introduced, and demonstrator products were molded. To evaluate the bonding strength between rib structures and laminated outer shell of press and injection hybrid molding composites, tensile test of T-shape specimen were conducted.

show abstract

Compression Molding of Carbon Fiber Reinforced Thermoplastics Using Non-Woven Stitched Multi-Axial Cloth by Means of Induction Heating System

Cited by 24 publications

References 9 publications

Internal Damage Evaluation of CFRTP Cut by a Circular Saw

Internal Damage Evaluation of CFRTP Cut by a Circular Saw

Influence of Laser Surface Treatment on the Tensile Shear Strength of Resistance Welded CFRTP

Press and injection hybrid molding of glass fiber reinforced thermoplastics

Contact Info

Product

Resources

About