Metal deforming – Tool and/or tool holder – Including flexible or yieldable tool or support
Patent
1989-01-27
1990-05-22
Jones, David
Metal deforming
Tool and/or tool holder
Including flexible or yieldable tool or support
72 54, 72 57, 524262, 524267, 524394, 524398, 524588, 524730, 524731, 524783, 524862, 524478, 524 15, 524 31, 524 32, 294211, B21D 2600
Patent
active
049266730
ABSTRACT:
Resilient, crosslinked silicone elastomers shaped as elastoforming dies or form blocks for the stamping of sheet material workpieces, e.g., ultra-thin sheet metal, and well adopted for applications in the automotive industry, include a crosslinked fluid organopolysiloxane having at least one silicone-compatible organic or inorganic plasticizer within the crosslinked network thereof, said at least one plasticizer being stable and nonmigrating under elastoforming stamping conditions, and said at least one plasticizer being present in such amount that said plasticized silicone elastomer has a Shore 00 hardness of less than about 40.
REFERENCES:
patent: 2966873 (1961-01-01), Hoffman et al.
patent: 3276239 (1966-10-01), Achler et al.
patent: 3986379 (1976-10-01), Mansell
patent: 3998778 (1976-12-01), Berg et al.
patent: 4111024 (1978-09-01), Dahlman et al.
patent: 4162625 (1979-07-01), Simmons
patent: 4386188 (1983-05-01), Grancio et al.
patent: 4722957 (1988-02-01), Braun et al.
Laurent Claude
Lyobard Rene
Rostaing Paul
Jones David
Rhone-Poulenc Chimie
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