Concrete composition for the manufacture of moulds, mould and pr

Details Concrete composition for the manufacture of moulds, mould and pr Concrete composition for the manufacture of moulds, mould and pr

1991-04-01

1993-02-23

Dixon, Jr., William R.

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

Utilizing surface to be reproduced as an impression pattern

264234, 264333, 264225, 164 6, 164 15, 164 21, 106 382, 106 3827, 106 383, 106 389, 106624, 106632, 106634, 106636, B29C 3340, B22C 1520, B28B 736, C04B 1448

Patent

active

051887916

ABSTRACT:
Compound concrete composition for the manufacture of moulds, comprising: (1) a binder which comprises an alkaline-earth mineral substance, a constituent made up of fine particles of a compound other than an oxide, 90% of which have a particle size of between 1 and 150 .mu.m with a median diameter of between 3 and 20 .mu.m, these fine particles comprising particles of a substance which has a thermal conductivity higher than approximately 30 W/mK, chosen from silicon carbides, silicon carbonitrides, silicon nitrides, boron carbides, titanium carbides and tungsten carbides and a constituent made up of ultrafine particles at least 70% of which have a particle size smaller than 1 .mu.m with a median diameter of between 0.3 and 0.8 .mu.m, (2) water optionally with the addition of a dispersant, and (3) fillers comprising metal granulates and metal fibres, wherein the water/binder ratio is lower than 0.20 and the concrete composition has a thermal conductivity at 200.degree. C. which is equal to or higher than 5 W/m K.

REFERENCES:
patent: 3229338 (1965-03-01), Kopera
patent: 4780141 (1988-10-01), Double et al.
patent: 4915740 (1990-04-01), Sakai et al.

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