Expert Skill of Injection Molding - A New Composite Processing Based on DFFIM

Nagao, Yoshihisa; Imajo, Akihiko; Nojima, Shinji; Hamada, Hiroyuki; Yang, Yuqiu

doi:10.1007/978-3-319-60474-9_34

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“…22,23 Based on the developed vent-injection molding technology, a new technology known as the Direct-Fiber-Feeding injection molding technology (DFFIM) was also proposed. 24,25 In the DFFIM technology, the continuous fiber roving strands can be directly guided into vent of the devolatilizing unit of the injection barrel and then fed into the melt solution by the shearing motion of the screw during the plasticization process as shown in Figure 1. Therefore, there is no need to pre-cut the fiber roving into segments to make pellets and dry them prior to their feeding into the injection molding machine, which leads to lower electricity, equipment, and labor cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of de-sizing on the structural and mechanical properties of carbon fiber reinforced polypropylene composites molded by the novel direct fiber feeding injection molding technology

Ahmed

Qin

Pang

et al. 2022

Journal of Thermoplastic Composite Materials

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Carbon fiber reinforced thermoplastic composites are rapidly emerging as alternative materials for auto parts due to recyclability, excellent stiffness, and strength to weight ratio. In the present study, the influence of carbon fiber de-sizing on the structural and mechanical properties of the sized and de-sized Carbon Fiber Reinforced Polypropylene (CFPP) composites molded by the recently developed novel Direct Fiber Feeding Injection Molding technology was studied. The effect of carbon fiber de-sizing on the structural properties was studied from the fiber dispersion status, fiber orientation factor, fiber volume fraction, and the fiber length. The surface morphology of the sized and de-sized carbon fibers was studied from the Scanning Electron Microscopy (SEM) and Atomic Force Microscope images. The static mechanical properties were studied based on the tensile tests at different loading rate and temperature. The Dynamic Mechanical Analysis tests were conducted to analyze the dynamic viscoelastic behavior of the sized and de-sized CFPP composites. The SEM images were used to observe the failure mechanism. The preliminary results indicated that de-sized composites had better fiber dispersion as compared to the sized CFPP composites. It was found that de-sizing the carbon fiber surface does not significantly affect the carbon fiber length, fiber volume fraction, and fiber orientation in the CFPP composites. Also, the de-sized composites showed better static and thermodynamic mechanical properties caused by the enhanced fiber matrix interaction in CFPP composites as compared to the sized CFPP composites. [Formula: see text]

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Section: Introductionmentioning

confidence: 99%