Back to results
US 4,446,091 AGranted
Carbon fiber-reinforced cement mould
AssigneeUnion Carbide Corporation
InventorsReginald D. Pairaudeau, David Turnbull
Life of this patent
Estimating the term…
Abstract
A carbon fiber-reinforced cement mould is provided which is capable of being thermally cycled continually at temperatures up to 200.degree. C. Such mould is particularly suitable for casting or forming plastic articles which require heating up to 200.degree. C. to effect curing. Because the mould remains free from cracking and surface spalling during such thermal cycling, it can be used over and over again.
Claims5
In a process for making and using a mold wherein a heat curable plastics composition is disposed in said mold and cured by heat, the improvement comprising:
- making said mold by combining carbon fibers with hydraulic cement and aggregate in the proportions of 1 to 6 parts by weight of said fibers to 100 parts by weight of said cement and aggregate and forming a coating, and mold surfaces to be in contact with said plastics composition such that said coating contains not more than 1-3 parts of carbon fibers by weight to 100 parts by weight of hydraulic cement and aggregate.
Dependencies are inferred from the claim text.