Pattern for producing a mold and method for manufacture of...

Details Pattern for producing a mold and method for manufacture of... Pattern for producing a mold and method for manufacture of...

B - Operations, Transporting

22

C

22/144, 22/161

B22C 7/00 (2006.01) B22C 7/06 (2006.01)

Patent

CA 1185066

ABSTRACT OF THE DISCLOSURE A method of producing a pattern for use in the manufacture of a mold which is adapted to be cured by micro- wave irradiation. The method comprises forming a rolled-over male pattern, forming a rolled-over female pattern having a scale-off layer along a boundary thereof with the male pattern, removing the scale-off layer, pouring a silicone RTV rubber into a cavity of the female pattern to form a match plate therein, setting a metallic frame on the match plate, filling the interior of the metallic frame with a mixture of microwave- pervious resin and dry silica sand, causing the mixture to be thermally cured thereby forming a reinforcing layer on the peripheral surface of the match plate, placing the male pattern within the reinforcing layer after removing the match plate therefrom, and injecting a microwave-pervious silicone rubber into the gap formed between the reinforcing layer and the male pattern thereby forming a mold defining layer on the inner surface of the reinforcing layer.

398499

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