摘要:
A friction spinning apparatus comprises two rollers (1, 2) in closely spaced parallel arrangement which define between them a yarn formation zone at an elongate gap along the rollers and a feed duct (41') which extends into the gap so as to feed fibres directly into the gap in such a manner that they can fall directly onto the yarn (419). The feed duct comprises two parts (415, 416) one (415) of which includes a planar portion defining a side wall of the fibre feed passage along the duct and the other (416) of which is a complex part defining the opposite side wall as well as end walls which in the assembled fibre feed duct extend between the opposite side walls.
摘要:
A friction spinning apparatus comprises two rollers (1, 2) in closely spaced parallel arrangement which define between them a yarn formation zone at an elongate gap along the rollers and a feed duct (41') which extends into the gap so as to feed fibres directly into the gap in such a manner that they can fall directly onto the yarn (419). The feed duct comprises two parts (415, 416) one (415) of which includes a planar portion defining a side wall of the fibre feed passage along the duct and the other (416) of which is a complex part defining the opposite side wall as well as end walls which in the assembled fibre feed duct extend between the opposite side walls.
摘要:
Friction spinning apparatus for producing a composite yarn has a groove or recess (21) formed in at least one of the friction spinning rollers (1,2) to receive a strand guide tube (21) which can then guide a core strand directly to the yarn formation line substantially at the nip between the rollers (1,2).
摘要:
Spinning is started on a friction spinning apparatus by drawing the end of yarn back to a position adjacent the surface but in such a condition that it is free from the influence of the suction through the surface. This is done by closing off the suction (14) while the end is in the position so that the yarn is drawn by an additional suction source (49) into an adjacent position. The yarn end is drawn from one end of the surface to lie along the surface by gradually closing off the suction from that end toward the opposite end. Subsequently the suction is re-opened to bring the yarn end under its influence to draw the end onto the surface so that fibre feed and take-up can be restarted.
摘要:
A fibre-opening unit for an open-end spinner comprises first pre-drafting rolls (3,4) and second pre-drafting rolls (5, 6) with a variable velocity ratio between the first and second pairs of rolls whereby the pre-draft can be changed in orderto adapt the open-end spinning unit to the quality of the sliver supplied.
摘要:
A friction spinning apparatus comprises two rollers (1, 2) in closely spaced parallel arrangement which define between them a yarn formation zone at an elongate gap along the rollers and a feed duct (41) which extends into the gap so as to feed fibres directly into the gap in such a manner that they can fall directly onto the yarn. The feed duct (41') is biassed slightly toward the roller (1) which turns into the gap so as to increase the proportion of fibres joining the yarn (419) at the junction with that roller.