METHOD FOR FORMING PREFORMS FROM ORGANIC GLASS FOR THE MANUFACTURE OF OPTICAL MULTILAYER COMPLEX-SHAPED PRODUCTS Russian patent published in 2021 - IPC B29C51/10 B29C51/14 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering, in particular to a technique for processing sheet blanks from transparent thermoplastics to obtain multilayer glazing products for aircraft, helicopters and other vehicles, and in particular to a method for molding organic glass blanks for optical multilayer complex-shaped products. The method includes: assembling a bag in the form of a sheet blank covered with a polyethylene film and a sacrificial sheet made of the same material, laying an elastic strip made of a rough adhesive thermoplastic film between the sheets and creating a vacuum between them, heating the bag, followed by molding by a vacuum contact method until obtaining necessary configuration of the workpiece, disassembly of the package. Wherein at least one sheet blank made of the same material is placed on the sheet blank, covered with a polyethylene film, an elastic gasket made of a rough adhesive thermoplastic film is installed between the blank and the additional blank, and a vacuum is created between all sheet blanks and the sacrificial sheet.

EFFECT: ensuring the manufacture of preforms from organic glass for multilayer complex-shaped products with high optical characteristics by ensuring equidistant surfaces of the preforms, as well as increasing the productivity of manufacturing preforms due to the ability to form all the necessary preforms at one time and on one mold.

2 cl, 1 dwg, 4 ex