Title:
MANUFACTURE OF FIBER-REINFORCED PLASTIC TUBE
Document Type and Number:
Japanese Patent JPH1110745
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve an accuracy and strength of a bent part of a blank tube without using material having different quality only at the bent part by enclosing a spiral notch formed at the bent part of the tube made of sheet-like fiber- reinforced plastic with a spreadable reinforcing member, then bending it, and thermally curing it. SOLUTION: A sheet-like prepreg 2 fixed with matrix of epoxy resin in which many extrafine carbon fibers are aligned is wound and laminated on a periphery of a mandrel 1 to form a blank tube 20. Then, a spiral notch 3 is formed on a specific part required for bending of the tube 20. An overall length of the specific part is covered with a plurality of prepregs having the same quality as that of the tube 20 as a reinforcing members 4 in such a manner that an arraying direction of the carbon fiber is set to a high angle θ of 75 to 80 to an axial direction of the tube 20 and the angle θ is intersected on upper and lower layers. Then, the specific part is bent, charged in a mold in which a bending shape is engraved, and thermally cured.
Inventors:
MURAKAMI NOBUHIRO
Application Number:
JP18065797A
Publication Date:
January 19, 1999
Filing Date:
June 20, 1997
Export Citation:
Assignee:
BRIDGESTONE SPORTS CO LTD
International Classes:
A63B53/10; A63C11/22; B29C53/08; B29C70/06; B29C70/16; B29C70/30; B29D23/00; A63B102/32; B29K105/08; B29K307/04; B29L23/00; (IPC1-7): B29C70/16; A63B53/10; A63C11/22; B29C53/08; B29C70/06; B29D23/00