Quote:
Originally Posted by billslugg
In the tissue industry, we utilize a 200 ton steam filled cast iron drum in the final drying stage. The paper is creped off of it by a steel blade. When a new drum is put in service, it must be cured. The process involves lard oil and sandpaper of finer and finer grades and takes several days. There is considerable mysticism around the practice. If the drum is "scratched" during a process upset, the whole process must be repeated. It is called "a polish" and cannot be rushed. We used to hang rubber chickens off the catwalk to insure a successful startup.
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This is probably of no relevance to anything of any interest to anyone here but I wanted to get it on the record. What we discovered was that when a process upset occurred, and the paper got too wet, it stripped the glue off the final drying cylinder. This allowed the stainless steel creping blade to contact the cast iron drum. Thus the blade melted and deposited itself on the drum. Given that SS is harder than cast iron, it thus dulled subsequent creper blades. When we polished a drum, we were removing the deposited stainless steel, BUT if we did not clean the drum properly, then carborundum grit would be left on the surface and dull subsequent crepers. Thus the mysticism. It took us from 1967 until about 1990 to figure this out.
BTW - What is this "Senior Member" BS? I'm a flakin' newby around here. How do you get this thing changed?