| abstract |
PURPOSE:To form easily a reservior for hot water etc. with high strength at low cost by mating a flexible hollow bag with any internal surface-shape of an outer mold body, while into said mold body recieving the hollow bag which is expanded and shape-retained by the grain supplied from out side, and friction-connecting said grains mutually. CONSTITUTION:After a film blank (e.g. cloth like glass fiber, carbon fiber etc.) 6 has been stuck to the internal surface of the component members 4, 5 of an outer mold which is devided into several parts, each outer mold-component member 4, 5 is assembled and connected by bolts 7 at flanges 4a, 5a, thereby constituting the hollow outer mold body 8. Next, a flexible hollow bag 9 made by e.g. polypropylene film etc. is put into said outer mold body 8 from an opening 46. This hollow bag 9 is expanded by being filled with grains 10 (e.g. foamed styrol ball etc.) and is mated with the internal surface-shape of the outer mold body 8. Then, while extracting only air in the hollow bag 9, each grain has been mutually friction-connected, and then uncured resin 11 is poured into the gap between the outer mold body 8 and the holloow bag 9, thereby forming the objective vessel. |