METHOD FOR MOULDING OF PRODUCTS FROM ACRYLIC PLASTIC Russian patent published in 2003 - IPC

FIELD: processing of moulding blanks from transparent thermoplastic materials, in particular, methods for moulding of products from acrylic plastic, applicable in any branch of machine building, in particular, for transparencies of airplanes and optical devices. SUBSTANCE: the method consists in placement of a moulding blank in a moulding tool, warming-up of the moulding tool to the moulding temperature and pneumovacuum or mechanical moulding. Before moulding the moulding of acrylic plastic is oriented in plane with a degree of stretching from 5 to 100%, and the moulding is conducted by the contactless method until the required radius of curvature of parts of a complex configuration is obtained. Moulding of parts of a complex configuration is conducted at a temperature within figuration is conducted at a temperature within 85 to 150C with a subsequent annealing. Annealing of parts of a complex configuration is conducted at a temperature below the steel softening point. EFFECT: enhanced optical and strength characteristics at a simplified procedure of the process of moulding. 3 cl, 1 tbl, 3 ex