LAMINATED ARTICLE WITH CORRUGATED AGGREGATE OF FIBROUS PLASTIC AND METHOD FOR ITS MANUFACTURE Russian patent published in 2000 - IPC

FIELD: multilayer articles of thermosetting plastics with fibrous aggregate in the form of rectangular corrugation obtained by pressing applicable in aircraft and ship building at manufacture of panels of interiors, partitions, etc. SUBSTANCE: laminated article has upper and lower parallel-arranged polatings and fibrous aggregate impregnated by polymeric binder. Aggregate is made in the form of a row of twinned corrugations of rectangular shape. Corrugations are glued together inside each row in vertical tangential walls of integrated corrugations. Corrugations are rigidly joined to the platings in the planes of their tops by an adhesive joint. The method for manufacture of laminated article includes manufacture of the upper and lower platings and corrugated aggregate, Then, corrugated aggregate is joined to the plating by pressing with formation of an adhesive joint in the planes of the corrugation tops. Aggregate is formed by pressing in stages. First manufactured are two open semicorrugations with triangle-shaped corrugations of the same height and thickness and with two successively alternating spacings of corrugating. Then, each semicorrugation is pressed in a mould with slots for rectangular-shaped corrugations with the corrugation height equal to the length of the rib of the triangular corrugation with two successively alternating spacings of corrugation respectively equal to the spacings of corrugating of the open semicorrugation. Pressing is accomplished simultaneously with the upper or lower plating up to formation of the upper or lower half-panel respectively. After that the bulges of the corrugations of the upper half-panel shifted relative to the corrugations of the lower half-panel on any of the two spacings of corrugating are matched in the same plane with the respective cavities of corrugations of the lower half- panel up to the stop. As a result, a rigid adhesive joint is formed in the planes of touching of the vertical walls of the matched corrugations. To this end, the difference of the two alternating values of spacings of corrugating is made equal to a double thickness of the corrugation wall. EFFECT: enhanced specific rigidity of article, expanded range of manufactured articles, reduced cost. 4 cl, 6 dwg