THREE-LAYERED STRUCTURES PRODUCTION METHOD Russian patent published in 1995 - IPC

FIELD: construction materials production. SUBSTANCE: method provides for application of transverse sticking bands 2 on both sides of strip billets 1 of filler, situating them in places of supposed tops of corrugations with space, that exceeds required space of corrugations. One-sided folds of "B" deep, that is equal to half of difference of sticking bands space "T" and space of corrugations, are made on billets 1 in parallel to sticking bands 2. Sticking bands are located on outer sides of folds. Billets 1 with folds are being situated between casings 3 and 4 in parallel to each other with an interval and are connected to them in places of sticking bands 2 application. Then casings 3 and 4 are being driven apart, by shifting one of them in respect to another in direction, that is opposite to direction of adjacent bendings 5 of folds, using value of shifting, that is equal to depth of folds, and subjecting produced three-layered structure to fixation. EFFECT: three-layered structures production method is used in construction to insulate heat, acoustical or mechanical attacks. 2 cl, 5 dwg