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US 4,673,453 AGranted
Method of making a structural body
AssigneeAB Hydro Betong
InventorHans C. Georgii
Life of this patent
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Abstract
A structural body is composed of a number of sections which are placed on one another and joined together. According to the invention, the sections, which consist of urethane foam or like plastic material, are provided, at least on one side and preferably on both sides, with a thin metal sheeting, and that the various sections are so shaped that their joining faces are congruent. The superposed sections, the joining faces of which are congruent, are cut out of sheets by means of a preferably computer-controlled laser.
Claims7
A method of making a structural body having a complex shape, the steps of which comprise:
- providing sheet material comprising a foamed plastic core sandwiched between two layers of thin metal sheeting for providing tensile and compressive strength;
- selecting a pattern of laterally joined sections, the whole of said pattern corresponding to said shaped body;
- cutting said sheet material into a plurality of shaped sections, each section corresponding to a section of said pattern and some of which differ in configuration from one another, by engaging a first laser on one side of the sheet and a second laser in opposition to said first laser on an opposing side of said sheet, said first and second lasers being controlled by a computer to produce said plurality of shaped sections with planar faces so that said sections can be assembled side-by-side with adjacent faces which are congruent;
- joining said plurality of shaped sections together with pairs of congruent faces in side-by-side contact to form a structural laminated body having curved surfaces and a variable cross-section;
- and
- providing on at least one surface of said structural laminated body a surface layer to provide increased mechanical strength.
3 more elements
Dependencies are inferred from the claim text.