Method for changing the bobbins in a roving frame
AssigneeZinser Textilmaschinen GmbH
InventorsFranz Machnik, Hans-Peter Weeger
Life of this patent
Estimating the term…
Abstract
A process for bobbin replacement on a flyer frame provided with a drafting frame, flyers, spindles and a bobbin rail, in which, while the flyer frame is running, a sliver end for each sliver supplied by the drafting frame is placed upon an empty bobbin sleeve. Initially only the flyers and the spindles of the flyer are driven. The flyers and the spindles are either immediately advanced in a forward direction or are initially driven backwards and after the lapse of a predetermined time period, brought to standstill and then driven forwardly, whereby the standstill of the flyers and the spindles coincide in time or are offset in time. After the start of the forward drive of the flyers and the spindles, the time-delayed drafting frame is set into operation.
Claims15
In a bobbin replacement process for a flyer roving machine in which roving is wound upon sleeves on spindles on a bobbin rail with flyers and spindles driven in a forward direction from sliver fed by a drafting frame to form respective bobbins, full bobbins are removed from the spindles and are replaced by empty sleeves, and a free end of a respective sliver is formed on each flyer, the improvement which comprises the steps of:
- (a) upon mounting of an empty sleeve on each spindle initially driving only the respective spindle and flyer to apply a respective one of said free ends to the respective empty sleeve, while the drafting frame is not driven to engage the free ends on the respective sleeves;
- and
- (b) thereafter driving said spindles and the respective flyers in the forward direction while driving the drafting frame for winding of respective bobbins on the sleeves.
A flyer roving machine comprising:
- a bobbin rail carrying a multiplicity of spindles adapted to receive sleeves on which respective bobbins are wound;
- respective flyers assigned to said spindles for delivering sliver to said sleeves;
- a drafting frame for feeding said sliver to said flyers;
- and
- control means effective during a bobbin replacement process in which full bobbins are removed from the spindles and are replaced by empty sleeves and a free end of a respective sliver is formed on each flyer, and connected with drives for said spindles, said bobbin rail, said flyer and said drafting frame for initially driving only the respective spindles and flyers upon mounting of empty sleeves on said spindles to a flyer respective one of said free ends to the respective empty sleeve while the drafting frame is not driven to engage the free end on the respective sleeves, and thereafter driving said spindles and the respective flyers forwardly while driving the drafting frame for winding of respective bobbins on the sleeves.
Dependencies are inferred from the claim text.