Method of making a silk-screened gasket of enhanced sealing char

Details Method of making a silk-screened gasket of enhanced sealing char Method of making a silk-screened gasket of enhanced sealing char

1985-04-01

1987-04-21

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156329, 277235B, 427282, B32B 3112

Patent

active

046594108

ABSTRACT:
A method of making a gasket assembly of enhanced sealing characteristics comprising the steps of providing a gasket body having an expansive metallic core and at least one compressible fiber-elastomer facing layer and defining at least one clear-through opening, providing a silk screen through which a fluid silicone sealant material is adapted to be squeezed in a desired sealing pattern onto the gasket body, squeezing through the silk screen a fluid, moisture-carbon dioxide curable, silicone sealant material which is curable in the presence of high humidity and carbon dioxide levels into a desired sealing pattern onto the facing layer without intervening barrier coats, preheating the gasket body to a temperature of from about 170.degree. F. to about 185.degree. F. for about 30 to 60 seconds without added moisture, positioning the patterned gasket body in a chamber, and exposing the gasket body in the chamber to a conditioned atmosphere of humidity of at least about 85% relative humidity and of a carbon dioxide volume percent of from about 9 to about 13%, for from about 5 to about 8 minutes, thereby to cure the silicone sealant material to form an elastomeric silicone sealing pattern on the gasket body.

REFERENCES:
patent: 3477867 (1969-11-01), Hillier
patent: 4471007 (1984-09-01), Pate

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