GB2228746A

GB2228746A - Apparatus for the production of staple fibre yarn

Info

Publication number: GB2228746A
Application number: GB9004453A
Authority: GB
Inventors: Manfred Pueschmann; Volker Roland; Peter Voidel
Original assignee: Kombinat Textima VEB
Current assignee: Kombinat Textima VEB
Priority date: 1989-03-01
Filing date: 1990-02-28
Publication date: 1990-09-05
Also published as: DE4002249A1; IT1244042B; IT9047639A1; GB9004453D0; DD284375A7; IT9047639A0

Description

1 1 APPARATUS FOR THE PRODUCTION OF STAPLE FIBRE YARN The invention

relates to an apparatus for the production of staple fibre yarn on spinning machines with centrifugal spindles.

Known spinning machines (see WP 22 772, and DE-OS 2 229 263) for the production of staple fibre yarn impart twist to the yarn in two stages by means of a drawing frame a pair of centrifugal spindles and a spooling unit. While one centrifugal spindle is filled from the drawing frame with partly twisted thread material, the partly twisted thread material of the second centrifugal spindle passes to the spooling unit and is then given the further final twist. By this method of operation, the mutually adjacent centrifugal spindles operating on one spool are always in a different working phase during the course of the two-stage spinning process. Te disadvantage with this arrangement is that it is not possible to stop the two centrifugal spindles together within one working cycle or to impart to them the same movements, for example, in the axial direction.

It is an object of the invention to provide an improved spinning machine or apparatus.

It is a further object of the invention to provide means by in which the disadvantage of the known machines are overcome and in which the sequence of work as a whole 1 2 is performed in a space-saving, rational and inexpensive manner and in which maintenance and repair are facilitated.

In its broadest aspect the present invention provides anapparatus for the production of a staple fibre yarn in two stages by means of centrifugal spindles, in which two adjacent centrifugal spindles carry out the same working phase at every instant.

The invention also provides apparatus comprising centrifugal spindles receiving fibres from a drawing frame and passing the fibres to spooling units wherein the spindles are mounted in a row of assembly units offset by a half-pitch relative to the spooling units with at least some of the assembly units having a pair of centrifugal spindles with the spindles of each such assembly unit being associated with different but adjacent spooling units to execute the feed, spooling, and preparation phases of each working cycle in synchronism.

The endmost spindle assembly units need possess just one spindle. The two centrifugal spindles of an assembly unit can be equipped with an individual drive or a common drive.

The invention is explained in more detail with reference to the following description and drawings representing embodiments thereof.

1 3 In the accompanying drawings:

Figure 1 is a schematic representation of part of an apparatus in accordance with the invention at a specific instant of a working cycle with some centrifugal spindles in the feed phase; Figure 2 is a schematic representation of part of the apparatus at the instant at which the centrifugal spindles that were previously in the feed phase are in the spooling phase; Figure 3 is a schematic representation of the part of the apparatus with spindles partly in the feed phase and partly in the preparation phase; and Figure 4 is a schematic representation of the apparatus showing a modified drive system.

As shown in Figures 1 to 4 a spinning apparatus employs a drawing frame 14 co-operating with spooling units 6 to 9 and a row of spindle assembly units 1 to 5. The units 1 to 5 are disposed in such a way that they are offset by a half-pitch relative to the spooling units 6 to 9. Two centrifugal spindles 10, 11 are accommodated in each of the units 2 to 4 and are journalled in the usual manner. As depicted in Figure 1, the two centrifugal spindles 10, 11 of each unit 2 to 4 possess a common drive motor 12 but it is also possible to provide each centrifugal spindle 10, 11 with its own drive motor 13 as depicted in Figure 4. As a result of the relative 4 dispositions of the assembly units 1 to 5 relative to the spooling units 6 to 9, the first and last assembly units 1,5 need by equipped with only one centrifugal spindle 10.

The distorted fibre material coming during the feed phase from the drawing frame 14 passes on a straight path into the centrifugal spindles 10,11 and is thereby partly twisted. The units 1,3 and 5 are, in Figure 1, in the feed phase. The assembly units 2 and 4, of which the centrifugal spindles 10,11 are fully wound and loaded are in the spooling phase and the partly twisted thread material is given its remaining twist between the centrifugal spindles 10,11 and the spooling units 6 to 9. During the spooling phase, as a result of the offset of the units 1 to 5 by a halfpitch relative to the spooling units 6 to 9, the thread material is fed from each centrifugal spindle 10, 11 of one assembly unit 2 to 4 to different, but adjacent, spooling unit 6 to 9.

Figure 2 shows the assembly units 2 and 4 in the feed phase and the assembly units 1, 3 and 5 in the spooling phase. Here again, due to the offset arrangement of the assembly units 1 to 5, each of the spooling units 6 to 9 is fed with thread material. Since the spooling phase is completed some time before the feed phase) this intervening period is available as a preparation phase for any cleaning, that may be necessary of the empty centrifugal spindles 10,11. This operation is illustrated in Figure 3. While the assembly units 2,4 are still being fed, the centrifugal spindles 10,11 of the assembly units 1,3 and 5 have been discharged and are available for the preparation of the next feed phase.

In these specific examples, four spooling units 6 to 9 and five spindle assembly units 1 to 5 have been shown but the total number of spooling units and assembly units is not limited.

6

Claims

1. Apparatus for the production of staple fibre yarns by imparting twist in two stages by means of centrifugal spindles receiving fibres from a drawing frame and passing the fibres to spooling units; wherein the spindles are mounted in a row of assembly units offset by a half-pitch relative to the spooling units with at least some of the assembly units having a pair of centrifugal spindles with the spindles of each such assembly unit being associated with different, but adjacent, spooling units to execute the feed, spooling, and preparation phases of each working cycle in synchronism.

2. Apparatus according to claim 1, wherein the centrifugal spindles of the assembly units are provided with individual drives.

3. Apparatus according to claim 1, wherein the centrifugal spindles of said same assembly units are driven by a common drive.

4. Apparatus according to claim 1, 2 or 3, wherein the first and last assembly units of the row are each equipped with only one centrifugal spindle.

k N 7

5. Apparatus for the production of a staple fibre yarn in two stages by means of centrifugal spindles, in which two adjacent centrifugal spindles carry out the same working phase at every instant.

6. Apparatus substantially as described with reference toy and as illustrated in, any one or more of the Figures of the accompanying drawings.

PUblIshed 1990atThe Patent Office.State House.68?1 High I-Ic)lbnm. IondonWC1R4TP.Purthereoples maybe obtained from The Patent O.Tice. Sales Branch. St Mary ^,ray. Orpington, Kent BR5 3RD. Prir ted by Multiplex techniques ltd. St Mary Cray. Kent. Con 1'87