METHOD OF MAKING CASTING MOLD FOR POLYURETHANE TIRE WITH INTERNAL DAMPING Russian patent published in 2020 - IPC B29C33/00 

FIELD: manufacturing technology.

SUBSTANCE: disclosed is a method of making casting mold for solid tire with internal damping due to availability of holes in side surface of tire. During its implementation three-dimensional model of tire is built, on its basis is built three-dimensional sector model of 1/8 of tire part, after which 3D model of casting mold is built for casting of 1/8 part of tire with elements of connection of molds and gating system, constructing three-dimensional models of component parts of casting mold for making 1/8 of tire with gating system and elements of connection of said components and elements of connection of said shape with similar shapes. Casting molding process includes 3D printing of sand-polymer mold parts for casting of 1/8 part of casting model shape, blowing said components by compressed air, mold assembly, its pouring with aluminum alloy and serial production of eight casts. After that, using metal cutting equipment, gates are removed and conjugated surfaces are crowned, on inner side surfaces of casts milling necessary inscriptions are made, threaded holes are made in sidewalls of four molds and cylindrical holes connected to them in sides of the other four molds. From the processed parts, a lower part of the casting mold is formed for casting of the tire by connection of mating side surfaces of four forms with threaded holes and upper part of casting mold for tire casting by connection of mating side surfaces of four molds with cylindrical holes for pins. Lower part of casting mold is installed on first cylindrical part to form seating surface of tire and is installed in said lower part of casting mold pins on thread, then, providing passage of pins through upper part of casting mold, connecting lower and upper parts and from above second cylindrical part is installed.

EFFECT: considerable simplification and cheapening of works on production of casting mold for polyurethane tire with internal damping.

1 cl, 12 dwg