METHOD OF MAKING RAILROAD SLEEPER AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 1995 - IPC

FIELD: industrial railroad transport systems. SUBSTANCE: method comprises steps of treating broken and metered wooden mass by surface active agent, subsequent introduction into it a Bakelite varnish with ratio 5-25% of total mass of an article according to a dry residue, after agitating introducing a resol base resin with a ratio 15-35% of total mass of the article according to the dry residue; agitating once more and setting at constant pressure on the mixture being up to 280 kg/sq.cm and temperature up to 170 C. Apparatus for performing the method includes a form and a punch. The form is connectable one, it includes a tray, removable beads and members for mounting the punch to the tray. The mounting is being performed through tie rods and spring-type or wedge-type rests, providing the constant pressure of the punch on the mass, being pressed. EFFECT: enhanced quality of sleepers. 3 cl, 2 dwg, 1 tbl