Spinning unit piecing process for producing feed spools
OwnerFritz Stahlecker, Hans Stahleckerinventors
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Abstract
In the case of a process for piecing at a spinning unit that is used for producing feed spools consisting of multiple-wound, prestrengthened slivers for a subsequent twisting operation or the like, it is provided that first the supply of the drafting roller device is started, after which the slivers are sucked into the pneumatic false-twisting devices, are guided through them and are then jointly gripped at the outlet of the false-twisting devices, are placed in a withdrawal device and are then fed to a winding-up device.
Claims46
A piecing process for piecing prestrengthened slivers formed in a unit of the type having drafting roller means for supplying a pair of drafted slivers, pneumatic false twisting means for forming prestrengthened slivers from the pair of drafted slivers, prestrengthened sliver withdrawing means for withdrawing the prestrengthened slivers from the false twisting means and joint sliver wind-up means for jointly winding up the pair of prestrengthened slivers to form feed spools of multiple wound prestrengthened slivers which can be used in subsequent twisting operations or the like to form commercially usable yarn, said process comprising the sequential steps of
- starting the supply of the pair of drafted slivers by the drafting roller means,
- inserting the pair of drafted slivers into the false twisting means.
- jointly gripping the pair of slivers at the outlet end of the false twisting means, and
- inserting the slivers into the withdrawing means were they are fed to the wind-up means.
A piecing process for piecing yarn components formed in a unit of the type having drafting means for supplying a plurality of drafted slivers, false twisting means for forming a plurality of yarn components from the plurality of drafted slivers, and joint feed spool forming means for forming feed spools with the plurality of yarn components jointly wound adjacent one another, which feed spools can be used in subsequent twisting operations or the like, said piecing process comprising the sequential steps of:
- starting the supply of the plurality of drafted slivers by the drafting means,
- inserting the plurality of drafted slivers into the false twisting means;
- gripping the plurality of yarn components at the outlet end of the false twisting means, and
- transferring the plurality of yarn components to the joint feed spool forming means.
A piecing process according to claim 26, wherein said inserting comprises using suction device sliver transfer means to first suck off the slivers from the drafting means and then to transfer them from the suction device sliver transfer means to a position where they are sucked into the false twisting means.
A piecing process according to claim 26, wherein said gripping includes jointly gripping the pair of yarn components, and wherein the joint feed spool forming means includes wind-up means for jointly winding up the pair of yarn components onto a feed spool and withdrawing means disposed between the outlet of the false twisting means and the wind-up means.
A piecing process according to claim 26, comprising monitoring the presence of the yarn component in the area behind the false-twisting means, and wherein the case of a breakage of one or both yarn components, the feeding of both
- slivers is interrupted.
A piecing process according to claim 26, wherein the slivers are monitored before entering the drafting means, and wherein if one sliver is absent, the further supply of the drafting means is interrupted.
A piecing process according to claim 26, wherein when the supply of the slivers is interrupted, the false-twisting means are moved out of the area of the drafting means, and means for aiding in the inserting of the pair of drafted slivers into the false-twisting means are moved into this area.
Piecing apparatus for piecing yarn components formed in a unit having:
- drafting means for supplying a plurality of drafted slivers,
- false twisting means for forming a plurality of yarn components from the plurality of drafted slivers,
- and joint feed spool forming means for forming feed spools with the plurality of yarn components, which feed spools can be used in subsequent twisting operations or the like,
- said piecing apparatus comprising:
- starting means for starting the supply of the plurality of drafted slivers by the drafting means,
- inserting means for inserting the plurality of drafted slivers into the false twisting means,
- gripping means for gripping the plurality of yarn components at the outlet end of the false twisting means, and
- transferring means for transferring the plurality of yarn components to the
- joint feed spool forming means.
Dependencies are inferred from the claim text.