METHOD OF PRODUCING MOULD FROM MATERIAL WITH HEAT-RESISTANT POLYMER MATRIX Russian patent published in 2016 - IPC B29C33/38 B22C9/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to production of composite material for moulds and can be used for moulding thermoplastic, fusible metals and composite materials based thereon. Method of making mould includes preparation of composite material containing 35 % of silicon carbide with particle size 5 mcm, 17 % of silicon carbide with particle size 2.5 mcm, 10 % of silicon carbide with particle size 1.25 mcm, 8 % of silicon carbide with particle size of 0.63 mcm, 6 % of silicon carbide with particle size 0.125 mcm, 8 % microsilica, 12 % of epoxy resin MR Advanced Poxy-Systems, 4 % hardener MR Poxy-Systems, 0.15 % wetting agent for epoxy compositions BYK-P1045, 0.01 % of antifoaming agent Troysol 307 Troy, composite material is prepared by mixing of solid components in a container with epoxy resin and container with hardener, wherein solid components are added to container in proportion to ratio of epoxy resin and hardener, mixing is carried out at a rate of 100-120 rpm for 10-15 minutes, the composition from smaller container is transferred into a larger container and obtained composition is mixed in same mode, a structure is mounted on tabletop of a vibration table for filling composition with moulding cavity, limited by surfaces of model of end product at joint line formed by mould and mould plate valves, in which is mounted a prefabricated cooling/heating system, obtained composition is poured into moulding cavity with simultaneous vibration, after which tabletop with structure is removed from vibration table and held for 1 hour in furnace at temperature 150 °C, followed by removing tabletop with structure from furnace and holding at room temperature for 24 hours, followed by separating structure from tabletop and sending for assembling mould.

EFFECT: technical result is increased rigidity and accuracy of making mould, higher thermal and corrosion resistance and heat conductivity.

1 cl, 2 dwg