INSULATED RAIL JOINT AND METHOD OF ITS MAKING Russian patent published in 2008 - IPC E01B11/54 B29C43/20 B29C43/56 

FIELD: railway transport; permanent way.

SUBSTANCE: proposed insulated rail joint consists of rail ends, fishplates with fasteners and glued-in insulating glass plastic-based gaskets. Gaskets are made of laminated epoxy glass plastic, number of layers from 3 to 9, with reinforcement material in form of cord glass cloth in which summary tex of longitudinal threads (warp) and cross threads (weft) is (10-5) to 1. Method of making of electric insulated rail joint includes preparation of surfaces of fishplates, rails and bolts, making of insulating gaskets, making and nesting of prepreg, forming of blanks of insulating gaskets to suit geometry of butt joint surfaces, insulation of surfaces of bolts, gluing-in of insulating gaskets and assembling of joint Nested prepreg with preset number of layers is placed on mandrel with surface following inner outline of fishplate. Layers of adhesive film are placed at both sides of pack of prepreg. So assembled pack is formed, together with mandrel, under vacuum to form insulating gaskets of homogeneous mass and preset geometry. Gaskets, thus formed, are placed on preliminarily treated and heated surface of fishplates, holes for bolts are cut out and then assembling and heat treatment of joint are carried out. Invention makes it possible to develop design and technology of making of electrically insulated rail joint providing high shift resistance at compression.

EFFECT: improved service characteristics of track.

5 cl, 1 ex, 1 tbl, 1 dwg