20.5-Inch-Mirror-Blank-Project: Difference between revisions
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[[Image:MirrorHexPattern.jpg|thumb|right]] | [[Image:MirrorHexPattern.jpg|thumb|right]] | ||
Originally I started with a 16 inch circular cutout mirror blank. Circular is a bad choice due to concentrating stress in the narrowest part of the webbing. The 20.5 inch casting was designed with a hexagonal webbing. The photo on the right shows the general layout. The original autocad dwg file is here: [[Media:20.5-Hex-Pattern-Layout.dwg]] | Originally I started with a 16 inch circular cutout mirror blank. Circular is a bad choice due to concentrating stress in the narrowest part of the webbing. The 20.5 inch casting was designed with a hexagonal webbing. The photo on the right shows the general layout. The original autocad dwg file is here: [[Media:20.5-Hex-Pattern-Layout.dwg]] | ||
== Mold Master Generation == | |||
All the techniques used to generate the [[16.2-Inch-Mirror-Blank-Project]] were used here to make the plaster master. The plaster master is destroyed generally by the de molding process of the silastic rubber mirror blank positive. | |||
[[Image:20.5-Rubber-Master.jpg|thumb|right]] | |||
Revision as of 23:37, 10 March 2007
Originally I started with a 16 inch circular cutout mirror blank. Circular is a bad choice due to concentrating stress in the narrowest part of the webbing. The 20.5 inch casting was designed with a hexagonal webbing. The photo on the right shows the general layout. The original autocad dwg file is here: Media:20.5-Hex-Pattern-Layout.dwg
Mold Master Generation
All the techniques used to generate the 16.2-Inch-Mirror-Blank-Project were used here to make the plaster master. The plaster master is destroyed generally by the de molding process of the silastic rubber mirror blank positive.
