I achieved my number one goal that day: I crossed the finish
line, whether or not it was official.
5 micro-inches for a highly polished mirror finish
for optical-grade products, up to Ra 50 or 60 micro-inches for satin-finished
products, or possibly as much as Ra 300 micro-inches for embossed or coarsely textured products.
It's common sense, says Trinowski, and a concept that influences surface finish
at all levels.
In many cases, the preferred parting-line location for a given neck finish
might be at the support ledge, which would make it impossible to change the neck finish
in the future unless the height and support-ledge diameter match (fig.
Two years ago, the company took on a project that led it to achieve its first smooth, high-gloss finish
with a waterborne paint.
In anticipation of a surface finish
problem, Durametal decided to run current green sand patterns in alloys other than hi-hard to see results without altering patterns.
, shakeout (for certain alloys), sand consumption reduction for larger cores and handling strength make the shell process attractive.