Flyerless spinning method and device with a drawing unit

Abstract

The invention concerns a spinning method without recourse to a flyer, for the direct spinning of sliver and also concerns an apparatus with a draft system in accord with the principal concepts of the independent claims. Various attempts have been made known, of directly spinning fiber on a ring spinning machine. In the case of spinning methods of this type, it is possible to eliminate the use of the flyer so that costs and space can be saved. It is particularly well known, that sliver with a band fineness of ca. 5 ktex in connection with a first draft system, which is normally a component of a draw frame, can be stored in a can. These cans are then brought to a movable creel, on which they are pulled away and fed into respectively one spinning position of a ring spinning machine. Since on the said creel, distortions of the sliver can occur, at this location no bands of less than 3.5 ktex are allowed. Since the distortion at the ring spinning machine is machine-limited, it is possible with this known method, to spin chiefly only rough ring yarn. This method has not been particularly well accepted due to: difficult access for maintenance, necessary space for the cans and the said distortion. One achieves finer yarns normally by the interposition of a flyer, by means of which a fiber with a band weight, for example, of 5 ktex is drawn to a pre-yarn with a roving of 200-1200 tex and wound onto a spool, in order that this can then be delivered to a ring spinning machine.

Description

technical field [0001] The invention relates to a flyerless spinning method for direct spinning of fiber sliver and a device with a drafting mechanism according to the preambles of the non-dependent claims. Background technique [0002] Various attempts are known to spin the fiber sliver directly on the ring spinning machine. In this type of spinning method, the roving process can be omitted, so that costs and space can be saved. It is known that in particular fiber slivers with a sliver denier of about 5 ktex are deposited in cans after the first drafting unit of the common parts of the drafting device. These cans are then conveyed to a can creel, where they are withdrawn and introduced into a respective spinning box of the ring spinning machine. Since tension drafts can easily occur on the can creel, thin slivers below 3.5ktex are not used here. Since the draft is limited on the ring spinning machine, only thick ring yarns can be spun with this known method. However, t...

AI Technical Summary

Problems solved by technology

Due to the limited draft on the ring spinning machine, only coarse ring yarns can be spun with this known method

However, this method cannot achieve the desired position of the can and the so-called tension drafting due to difficult operability.

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