Abstract: A method for setting up and molding or forming thin coated fabrics as in the production of diaphragms, where a hard die is installed on one plate of a pair of molding plates and a comparably sized or somewhat large die cavity is provided on the opposing plate, the plate set being then assembled in a molding press in conventional fashion. The die cavity is filled with an uncured elastomer and the press closed under enough heat and pressure to mold in place an exact elastomer mating die, unique to that plate and press setup. Once the elastomer is cured or vulcanized, the mold is opened and the excess flash is trimmed off. From this point on, the mold is used in the same manner as a traditional mold for molding formed articles such as diaphragms from thin coated fabrics, until the setup is disassembled or otherwise disturbed, after which the elastomer mating die is no longer useful.

Abstract: A spray gun configured with a roiling wall diaphragm piston and vented piston cylinder connecting the needle to the needle actuator and isolating the liquid chamber of the nozzle body from the actuator section. The flange of the rolling wall diaphragm is sealed between the mating faces of the nozzle body housing and the actuator housing. The actuator is a double action air operated piston and cylinder. Sanitary, non-threaded quick disconnect couplings are used between the several components of the spray gun for easy cleaning and servicing of the nozzle body, tip and needle, and easy replacement of the rolling wall diaphragm.