Production of high melting point metallic molds
AssigneeRhone-Poulenc Specialites Chimiques
InventorsElie Magnan, Robert Guillermond
Life of this patent
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Abstract
High melting point metallic, e.g., steel mold members are facilely and inexpensively produced by depositing, e.g., flame-spraying, droplets of a melt of a metal having a high melting point onto the front face surface of an elastomeric silicone mold pattern, said elastomeric silicone containing from 20 to 90% by weight of finely divided particulates of at least one refractory filler, and thereafter permitting said melt to solidify.
Claims25
A process for the production of a metal mold member, comprising spraying a melt of a metal having a melting point of at least 1000.degree. C. onto the front face surface of an elastomeric silicone mold pattern, said front face surface having a Shore A hardness ranging from 61 to 79, said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler, permitting said melt to solidify, and thereafter detaching said metal mold member from said mold pattern.
A process for the production of a metal mold member, comprising co-extensively depositing a layer of a curable organopolysiloxane onto the surface to be reproduced of a master model, curing said organopolysiloxane into an elastomeric silicone mold pattern, spraying droplets of a melt of a metal having a melting point of at least 1,000.degree. C. onto the front face surface of said elastomeric silicone mold pattern, said front face surface having a Shore A hardness ranging from 61 to 79, said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler, permitting said melt to solidify, and thereafter detaching said metal mold member from said mold pattern.
An elastomeric mold pattern comprising a front faced surface defining a mold configuration to be reproduced by the spraying of molten metal, said front face surface having a Shore A hardness ranging from 61 to 79 and said front face surface having a peripherial region having a Shore A hardness of less than about 30, and said elastomeric silicone containing from about 39 to about 74% by weight of finely divided particulates of at least one refractory filler.
Dependencies are inferred from the claim text.