Document Type and Number:
Japanese Patent JPS57500921
Kind Code:
A
Abstract:
A method of making boat hulls, vehicle bodies, containers and similar shell structures by fastening panels on both sides of a tube lattice, and a tube lattice adapted for making such structures. A first component for the forming of an expansion material, in an amount apportioned to the volumes of the cavities defined between the tubes and the panels, is placed in the cavities prior to closing the cavities, and an activating component is injected into the cavities after the closing thereof in order to cause expansion, by use of at least some of the tubes as distribution channels for said activating component. The tube lattice used for making the structures comprises apertures (8) in at least one of the tubes (5) defining each cavity, in the wall facing said cavity, said aperture or apertures being adapted for the injection of said activating component. Thus, the quantity of expansion material (7) in each cavity can be apportioned to the volume thereof. Some of the tubes (5) may comprise ribs (9) or grooves adapted to engage the edges of panel elements (1, 2, 3, 4).
Application Number:
JP50184581A
Publication Date:
May 27, 1982
Filing Date:
June 10, 1981
Export Citation:
International Classes:
B29C39/12; B29C44/18; B32B5/20; B63B5/24; F16S1/00; E04C2/34; (IPC1-7): F16S1/00; B63B5/24; B32B5/20; B29D27/04