Method for operating an open-end friction spinning machine
AssigneesHans Stahlecker, Fritz Stahlecker
InventorFritz Stahlecker
Life of this patent
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Abstract
A process for operating an open-end friction spinning machine is provided in which the spinning units each have at least two friction areas that form a yarn-forming region. At least a part of the friction effect is determined separately for each friction surface. The friction effect is compared between such friction surfaces. A corresponding open-end friction spinning machine apparatus is also provided.
Claims16
A process for operating an open-end friction spinning machine having at least one spinning unit with each of said at least one spinning units including:
- a yarn forming friction zone formed by at least two friction surfaces moving in opposite directions creating a yarn forming region and forming a wedge-shaped gap, wherein yarn is formed from fibers by means of a friction effect at said friction surfaces, said friction effect comprising at least one of suction effect and friction surface coefficient of friction effect, said friction surfaces including a first friction surface moving into said wedge-shaped gap and a second friction surface moving out of said wedge-shaped gap, said second friction surface over at least a part of the length of the wedge-shaped gap being designed for a friction effect that is higher than a friction effect of said first friction surface,
- feeding means for the feeding of fibers to the friction zone,
- yarn withdrawal means for withdrawing the forming yarn from the friction zone,
- said process comprising:
- determining only the friction effect of said first friction surface relative to said second friction surface, said determining including separately monitoring the friction effect of each of said first and second friction surfaces, and
- generating a signal when said at least a part of the length of said second friction surface has a friction effect outside the range of 5% to 25% greater than a friction effect of said first friction surface.
Process as in claim 11, wherein said correcting includes adjusting a spinning parameter influencing the friction effect.
Open-end friction spinning machine having at least one spinning unit, each of said at least one spinning units comprising:
- a friction zone formed by at least two friction surfaces moving in opposite directions creating a yarn forming region and forming a wedge-shaped gap, wherein yarn is formed from fibers by means of a friction effect at said friction surfaces, said friction effect comprising at least one of suction effect and friction surface coefficient of friction effect, said friction surfaces including a first friction surface moving into said wedge-shaped gap and a second friction surface moving out of said wedge-shaped gap, said second friction surface over at least a part of the length of the wedge-shaped gap being designed for a friction effect that is higher than a friction effect of said first friction surface,
- feeding means for the feeding of fibers to the friction zone,
- suction means for applying suction forces to the friction zone,
- yarn withdrawal means for withdrawing the forming yarn from the friction zone;
- determining means for determining only the friction effect of said first friction surface relative to said second friction surface, said determining means including monitoring means for separately monitoring the friction effect of each of said first and second friction surfaces, and
- signal generating means for generating a signal when said at least a part of the length of said second friction surface has a friction effect outside the range of 5% to 25% greater than a friction effect of said first friction surface.
Dependencies are inferred from the claim text.