Method and apparatus for continuously draw molding helical...

Details Method and apparatus for continuously draw molding helical... Method and apparatus for continuously draw molding helical...

B - Operations, Transporting

29

C

B29C 70/52 (2006.01) B29C 53/30 (2006.01) B29C 59/02 (2006.01) B29C 53/58 (2006.01)

Patent

CA 2176920

A method of continuously draw-molding a fiber reinforced plastic rod formed with a spiral groove comprises the steps of arranging in parallel a plurality of reinforcing fibers under tension, impregnating an unhardened thermosetting resin in the reinforcing fibers with tension being applied to the reinforcing fibers, winding a tape having a resin impregnable property and an expandible and contractible property around a fiber bundle composed of the thermosetting resin impregnated reinforcing fibers in a spiral fashion with a winding angle being substantially equal to an angle of the spiral groove with respect to an axial direction of a rod to be molded, passing the fiber bundle with the wound tape in a heating mold provided with a hole having a cross section substantially equal to that of the rod to be molded to heat and harden the thermosetting resin, and taking up the tape thereafter.

Procédé de moulage par étirage en continu de tiges en matière plastique renforcée par fibres portant une rainure hélicoïdale. Il consiste à mettre en ordre une pluralité de fibres de renforcement, à imprégner les fibres de renforcement ainsi obtenues d'une résine thermodurcissable non durcie et simultanément à soumettre ces fibres à un effort de traction, à enrouler de manière hélicoïdale autour d'un faisceau de fibres imprégnées de résine thermodurcissable un ruban expansible apte à s'imprégner de résine, et ce selon un angle sensiblement égal à celui formé entre une rainure ménagée dans une tige moulée et l'axe de celle-ci, à introduire ce faisceau de fibres portant le ruban enroulé dans un moule métallique de chauffage dont le trou a un profil transversal sensiblement identique à celui de la tige moulée, afin de provoquer le durcissement thermique de la résine thermodurcissable, et enfin à enrouler le ruban sur un élément enrouleur.

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