Braid-press forming for manufacturing thermoplastic CFRP tube
- PDF / 1,491,620 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 13 Downloads / 190 Views
ORIGINAL RESEARCH
Braid-press forming for manufacturing thermoplastic CFRP tube D. Tatsuno 1
&
T. Yoneyama 1 & T. Kinari 1 & E. Sakanishi 2 & T. Ochiai 2 & Y. Taniichi 2
Received: 23 April 2020 / Accepted: 4 August 2020 # Springer-Verlag France SAS, part of Springer Nature 2020
Abstract Braid-press forming was developed for manufacturing hollow tube parts made of carbon fiber reinforced thermoplastic (CFRTP) tape. The CFRTP tapes were braided to make a tube, which was consolidated under pressure and heat in the press forming process. Internal pressure was applied to the braided CFRTP tube by a silicone rubber rod inserted in the tube using axial compression. The reason for using a silicone rubber rod was to apply a high internal pressure until the molten resin solidified, which cannot be achieved in bladder molding and pultrusion, and to obtain good consolidation quality and high mechanical properties. As a result, up to 7 MPa press pressure was successfully applied and the tube made contained no voids and had good flexural properties. The study of the pressure showed that the higher press pressure (from 4.1 MPa) produced tubes with higher flexural properties. The estimation of wall thickness after press forming using the braiding architecture agreed with the measured value. Subjects to be addressed in future studies are productivity improvements and continuous tube manufacturing by the serial joining of braiding and press forming. It can be concluded that braid-press forming is a desirable method for the manufacturing of tubes for structural applications and can be used in future mass-production. Keywords Carbon fiber reinforced plastic . Thermoforming . Tube forming . Internal pressure
Introduction Carbon fiber reinforced plastics (CFRP) are used in fields that benefit from its high mechanical strength per unit weight, compared to metal-based materials, such as the automotive and aviation fields. A hollow tube structure with its reduced weight and material cost furthers this benefit. Examples of CFRP tube applications are structural rods, shafts, pressure vessels, artificial bones, sporting goods, and impact-absorbing components [1–3]. It is possible to combine hat-shaped panels to manufacture a CFRP tube. D. Chen et al. have introduced compressed air between hat-shaped and the flat panels of prepreg in the mold during the curing process to conform the prepregs to the mold [4]. Z. Xiao et al. proposed a water-soluble core made of NaCl to withstand the pressure during curing [5]. T. Matsuo et al. have welded the flange of the hat-shaped thermoplastic CFRP
* D. Tatsuno [email protected] 1
Advanced Manufacturing Technology Institute, Kanazawa University, Kakuma, Kanazawa, Ishikawa 9201192, Japan
2
Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 9201192, Japan
panels to derive a hollow beam [6]. The disadvantage of these simple methods is that the bonding interface becomes a weak point because there is no fiber reinforcement. Braiding is an adeq
Data Loading...
