Report of Investigations 7463: Roll Forming Strip from Oxide Powders

Details

• Personal Author:
  Forkner, Bob L. ; Harris, Henry M. ; Kelly, Hal J.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  The roll forming of oxide powders was studied in a Bureau of Mines investigation to find the conditions and parameters required to make satisfactory ceramic strip. High-quality porous or dense alumina, zirconia, and porcelain shapes were made be sintering strip roll- formed at room temperature from powders containing minor amounts of binder and water. Strips with thicknesses of 0.04 to 0.08 Inch and bulk densities from 40 to 90 percent of theoretical densities were made. The parameters most important to formability were particle size, condition of the powders, and roll gap. Other factors affecting quality were speed and surface condition of the rolls, amount and type of binder, water content, and sintering conditions. Ceramic strip was formed at rates up to 78 feet/minute, which is 13 to 23 times faster than reported by previous investigators, and forming was done in a simple and inexpensive roll unit. Reshaping the strip was possible by cutting, grinding, shearing, and stamping. The following innovations were developed that allow roll processing not normally possible with ceramic powders: (1) fine- sized powders were made into strip by preparing these as partially sintered granules; (2) thick strip was formed by pressure feeding powders into the rolls; (3) flexible strip was made using a rubber- base bonding agent; (4) corrugated strip was formed on shaped rolls; and (5) porcelain strip was densified and reduced in thickness by rerolling while hot. [Description provided by NIOSH]
• Subjects:
  Chemistry Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• ISSN:
  1066-5552 (print)
• Publisher:
  United States. Bureau of Mines
• Document Type:
  Text
• Genre:
  Case Report
• Place as Subject:
  District of Columbia ; Oregon ; OSHA Region 10 ; OSHA Region 3
• Rights:
  Public Domain
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  ALRC - Albany Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  31 pdf pages
• NIOSHTIC Number:
  nn:10009211
• NTIS Accession Number:
  PB-196690
• Citation:
  Washington, DC: U.S. Department of the Interior, Bureau of Mines, RI 7463, 1970 Dec; :1-24
• Federal Fiscal Year:
  1971
• Peer Reviewed:
  False
• Source Full Name:
  Washington, DC: U.S. Department of the Interior, Bureau of Mines, RI 7463
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:746539236f4e50f0ce5155e30d24b113f2ed592f31e2302f5a7eb39f13cdb7517719372d83caf958fa2f5f48eb2988afe06e6222d725080ea5337aa9b949240b
• Download URL:
  https://stacks.cdc.gov/view/cdc/201669/cdc_201669_DS1.pdf
• File Type:
  [PDF - 13.37 MB ]