Thread-guiding component with improved surface
AssigneeHoechst Aktiengesellschaft
InventorsJosef Bach, Jurgen Lorenz, Eugene Morach
Life of this patent
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Abstract
Described are thread-guiding components for apparatus for producing, treating and processing fiber materials, having a surface which comes into contact with the fiber materials defined by certain values of the maximum averaged roughness depth R.sub.z and the values of the load-bearing proportion calculated for certain depths of cut. The defined surface comprises a cermet material. Preferably there is additionally deposited on it an outer layer, from 0.1 to 10.0 .mu.m in thickness of nitrides and/or carbides of titanium or chromium. The components are notable for significantly enhanced long-term stability of the surface properties. The components are preferably godets.
Claims23
An implement for producing, treating, or processing fiber material comprising:
- a thread-guiding component, said thread guiding component having a surface, wherein
- said surface contacts the fiber material,
- said surface is composed of a ceramic-metal composite material having an electric resistance of not more than 25 .mu..OMEGA. cm,
- said surface has a maximum roughness depth R.sub.max, determined by averaging 5 measurements of maximum roughness depth, of between 20 and 30 .mu.m, with the root mean square deviation of from 3 to 8 .mu.m,
- said surface has an average roughness depth R.sub.z, determined by averaging 5 measurements of average roughness depth, of between 15 and 25 .mu.m, with a root mean square deviation of from 2 to 5 .mu.m, and
- said surface has, for a plane at depth of cut from 6 to 12 .mu.m, a load bearing proportion of about 10% of the surface, and, for a plane at depth of cut from 18 to 25 .mu.m, a load-bearing proportion of about 90% of the surface.
An implement for producing, treating, or processing fiber material comprising:
- a thread-guiding component, said thread guiding component having a surface with an outer layer, wherein
- said surface contacts the fiber material,
- said surface is composed of a ceramic-metal composite material having an electric resistance of not more than 25 .mu..OMEGA. cm,
- said surface has a maximum roughness depth R.sub.max, determined by averaging 5 measurements of maximum roughness depth, of between 20 and 30 .mu.m, with the root mean square deviation of from 3 to 8 .mu.m, and
- said surface has an average roughness depth R.sub.z, determined by averaging 5 measurements of average roughness depth, of between 15 and 25 .mu.m, with a root mean square deviation of from 2 to 5 .mu.m,
- wherein the outer layer is titanium nitride, titanium carbon nitride, chromium nitride, or mixtures thereof.
Dependencies are inferred from the claim text.