| 摘要 |
PURPOSE:To draw form the CFRP having no breakages or orientation disorders of fibers, high strength and a thin wall by dividing a pultrusion hot die into three parts, i.e. a resin drawing zone, a gelling zone and a curing zone, and regulating the temperature of each part independently. CONSTITUTION:A carbon fiber prepreg 7 wound on a mandrel 8 is passed through the hot die 10 divided into three parts, and is drawn in (C) direction at take up mechanism 9. Thus, a cylindrical CFRP may be formed. The temperature of the resin drawing zone 11 with 4-6 deg. drawing angle (a) is slightly low, and the temperature of gellation zone 12 is sufficient for gellation of the resin for impregnation, and then the curing zone 13 has slightly large inner diameter and its temperature is kept by controlling at the sufficient temperature for curing the resin. The drawing angle (a) is caused to be a suitable angle, and in the front half part of the gelling zone 12 the resin for impregnation gels perfectly, and then in the curing zone 13 the resin is cured at uncontact condition, whereby CFRP having no defects or orientation disorders of the fibers, high strength and a thin wall may be manufactured.
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