Method of determining setting values for a preliminary draft in a regulated draw frame
AssigneeTrutzschler GmbH & Co. KG
InventorAchim Breuer
Life of this patent
Estimating the term…
Abstract
A method of determining an optimal preliminary draft of sliver running consecutively through a preliminary drafting field and a principal drafting field. The method includes the following steps: setting various levels for the preliminary draft; measuring quality-characterizing magnitudes of the sliver drafted at the various preliminary draft levels; deriving sliver number deviations from the quality-characterizing magnitudes; determining a function between the sliver number deviations and the respective preliminary draft levels; forming two approximated straight lines from the function; determining a value of a point of intersection between the two straight lines; and utilizing the value of the point of intersection for setting the optimal preliminary draft.
Claims8
A method of determining an optimal preliminary draft of sliver running consecutively through a preliminary drafting field and a principal drafting field, comprising the following steps:
- (a) setting various preliminary draft levels;
- (b) measuring quality-characterizing magnitudes of the sliver drafted at the various preliminary draft levels;
- (c) deriving sliver number deviations from said quality-characterizing magnitudes;
- (d) determining a function between the sliver number deviations and respective said preliminary draft levels;
- (e) approximating two straight lines from said function;
- (f) determining a value of a point of intersection between the two straight lines;
- and
- (g) utilizing said value of said point of intersection for setting the optimal preliminary draft.
Dependencies are inferred from the claim text.