Plastic article or earthenware shaping or treating: apparatus – Diverse distinct type shaping means – Shaping orifice and either a downstream preform reshaping...
Patent
1997-09-11
2000-06-06
Vargot, Mathieu D.
Plastic article or earthenware shaping or treating: apparatus
Diverse distinct type shaping means
Shaping orifice and either a downstream preform reshaping...
2989521, 298953, 29282, 264 16, 264 27, 264284, 425363, 425377, 425385, 492 46, B29C 4700, B29C 5904, F28S 502
Patent
active
060711108
ABSTRACT:
A polishing roll, used for forming a smooth plastic sheet, includes a chill roll and a polishing sleeve positioned on the chill roll. The polishing sleeve has a polished outer surface for forming a corresponding smooth surface in a plastic sheet. The sleeve may be readily manufactured and transported to a desired location to be installed on the chill roll. The polishing roll may be readily used in combination with an extruder for extruding a hot plastic sheet to form the smooth plastic sheet. The sleeve may also be removed from the chill roll and transported for resurfacing and without requiring transporting of the chill roll. The sleeve may preferably comprise a nickel-phosphorous composition defining at least a radially outermost portion of the sleeve in which the polished surface is formed. More particularly, the nickel-phosphorous composition is preferably an amorphous nickel-phosphorous composition comprising nickel in a range of about 75 to 86 percent, and phosphorous in a range of about 14 to 25 percent. The nickel-phosphorous composition may be formed by electrodepositing or electroless depositing.
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