Construction board and its manufacturing method
AssigneeOy Partek AB
InventorsTarmo Willman, Esko Brunila, Bjarne Pelto, Lars Heselius
Life of this patent
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Abstract
A longitudinal laminate board of mineral wool and method of making the board are disclosed. The laminate board consists of adjacently disposed pieces at least some of which are shorter than the length of the board and whose fibre plane form an essentially right angle to the plane of the laminate board. The pieces are jointed within the laminate board.
Claims13
A longitudinally extending lamella board (1) having opposed main surfaces and constructed of a plurality of side by side lamellas (4) of binder fixed mineral wool fibers having a first fibre orientation and defining a core for a sandwich element having a surface layer of sheet material on both main surfaces, the lamellas (4) extending in the longitudinal direction of the board and the first fibre orientation of the lamellas forming essentially a right angle to the main surfaces of the board, the improvement wherein at least some of the lamellas (4) consist of lamella pieces (2) having a longitudinal axis extending parallel to the longitudinal direction of said laminate board (1) and having side surfaces and opposing end surfaces, said pieces being shorter than the lamella board (1) and interconnected at said opposing end surfaces, and said pieces extending between said main surfaces of said board without any separate support structure between said main surfaces.
A method for manufacturing a longitudinally extending lamella board (1) having opposed main surfaces and constructed of a plurality of side by side lamellas (4) of binder fixed mineral wool fibers having a first fibre orientation and defining a core for a sandwich element having a surface layer of sheet material on both main surfaces, the lamellas (4) extending in the longitudinal direction of the board and the first fibre orientation of the lamellas forming essentially a right angle to the main surface of the board, at least some of the lamellas (4) consisting of lamella pieces (2) having a longitudinal axis extending parallel to the longitudinal direction of said laminate board (1) and having side surfaces and opposing end surfaces, and said pieces being shorter than the lamella board (1) and interconnected at said opposing end surfaces and said lamella pieces being cut from a mineral wool mat of a different length than that of the lamella board and turned 90.degree. around their longitudinal axis and assembled in end to end and side by side relation into said lamella board, said method comprising the steps of finishing the opposing end surfaces of successive lamella pieces (2) to match each other;
- interconnecting said pieces (2), in said end to end relation, into at least one long lamella;
- cutting said at least one long lamella into a plurality of lamellas (4) having lengths equalling the length of the lamella board (1);
- and assembling the cut lamellas (4) together in said side by side relation to form the lamella board.
Dependencies are inferred from the claim text.