The invention relates to a device on a spinning preparation machine, for example a carding machine or draw frame, involving the discharge of a sliver with a discharging device and depositing of the sliver on a support. The discharge device and the support can be moved relative to each other and the sliver (sliver bundle) deposited on the support can be fed to a processing machine downstream.
In a known device shown in European Patent Document EP 0 457 099, a sliver produced by a sliver delivery machine (a carding machine or draw frame) is deposited in a spinning can with a rectangular cross-section. In the process, the can moves back and forth within the depositing region. Once the can is filled with the ring-shaped deposited sliver, the can is moved out of the depositing region and is supplied to a downstream-connected device. A plurality of filled cans are stored in intermediate storage areas and the cans are supplied from there to, for example, a spinning machine. The cans are transported between the storage area and the spinning machine with the aid of a carriage. One disadvantage of the device is the high equipment cost for the system. A plurality of empty cans must be supplied to the depositing region of the machines for depositing the sliver and the cans filled with the sliver must then be removed again from the depositing region. Added to the expense for the structural adaptation of the machine to the can and the handling involved with the additional conveying or transport expenditure for the cans is the considerable expenditure for the cans themselves (purchase, storage, repair and the like). Finally, the sliver must also then be removed again from the cans at the downstream-connected processing machine.
It is an object of the invention to create a device of the aforementioned type that avoids the above-mentioned disadvantages. In particular, the device should permit the easy displacement of the deposited sliver (sliver bundle) in the depositing region and/or out of the depositing region of the machine, thus making possible a considerable reduction in the equipment expenditure for the system.
Embodiments of the invention provide a device on a spinning preparation machine for receiving a sliver from a discharge device of the spinning preparation machine and transporting the sliver to a downstream machine, the spinning preparation machine having a depositing region, the device comprises a support for receiving the sliver deposited from the discharge device in the depositing region; and a moving device for moving the deposited sliver relative to the discharge device in the depositing region for forming a free standing sliver bundle, and for moving the free standing sliver bundle out of the depositing region for transport to a downstream machine.
Other embodiments of the invention provide a method of depositing and transporting a sliver bundle. The method comprises discharging a sliver from a discharge device of a spinning preparation machine; depositing the discharged sliver on a movable support in a discharge region of the spinning preparation machine; moving the support back and forth inside the depositing region relative to the discharge device to create a free standing deposited sliver bundle on the support; and moving the support with the free-standing sliver bundle to a downstream machine.
Sliver processing can be simplified considerably due to the fact that the deposited sliver (sliver bundle) as such can be moved during the sliver deposit with mechanical means within the depositing region, as well as out of the depositing region following the sliver deposit. Also, the removal of the slivers from cans or the like at the downstream-connected processing machine, for example a spinning machine, is omitted. Added to this is a large reduction in the equipment expenditure for the system. A structural adaptation of the sliver delivery machine (draw frame, carding machine) to a can is not necessary. In particular, the full scope of expenditure required for purchasing, storing and repairing a large number of cans and the like is avoided.
The invention is explained below in further detail with the aid of exemplary embodiments shown in the drawings, wherein:
a is a schematic side elevation view of a draw frame with a device according to the invention, using a carriage for the sliver deposit, shown in one end position below a rotating plate;
b shows the device according to
c shows the device according to
a is a top view of a sliver bundle deposited freely on the top of a carriage;
b is a side elevation view of the sliver bundle shown in
a is a side elevation view of an embodiment of the invention using a conveyor belt that can be raised and lowered and functions as sliver deposit and removal device during the depositing operation;
b is a side elevation view of the embodiment shown in
Carriage 3 moves back and forth horizontally below the rotating plate 2 while the sliver 4 is deposited. One end position of carriage 3 is shown in
The speed-controlled electric motor 5 drives the carriage 3 with a non-jolting or nearly non-jolting speed. The acceleration and deceleration, in particular, occur without jolting or nearly without jolting while the speed between the acceleration and deceleration remains uniform. The sliver bundle 4 thus remains stable during the back and forth movement in the depositing region 8, according to
While the sliver is being deposited, the control unit 6 (see
The rate of the back and forth movement of the carriage 3 is also controlled to increase the stability of the sliver bundle 4. As the carriage 3 reaches the reversal point at either end of the back and forth movement, the control unit 6 decelerates the carriage 3 as the carriage 3 approaches a seam area 402a or 402b of the sliver bundle 4 and accelerates the carriage 3 as the carriage leaves the seam area 402a or 402b. In between the seam areas 402a and 402b on either side of the sliver bundle 4, the control unit 6 controls the carriage 3 to have a constant speed. The seam area 402a or 402b is the location on either end of the sliver bundle 4 where the sliver rings deposited on the carriage 3 do not completely overlap (see
To account for less sliver being deposited in the seam area 402a or 402b, the control unit 6 decelerates the carriage 3 so that more sliver may be deposited in the seam area 402a or 402b and accelerates the carriage 3 to a constant speed in the non-seam area 404. The deceleration of the carriage 3 increases the amount of sliver deposited in the seam area 402a or 402b since the rotating plate 2 discharges the sliver at a constant rate independent of the movement of the carriage 3. When the carriage 3 decelerates, more sliver may be deposited at that location to account for the non-overlapping rings of sliver near the reversal points. The non-uniform speed of the carriage 3 permits a substantially uniform amount of sliver to be deposited at both the seam area 402a or 402b and the non-seam area 404 of the sliver bundle 4 for each layer of sliver deposited in the back and forth movement of the carriage 3. The non-uniform speed of the carriage 3 also provides substantially uniform density of the sliver at all locations within the sliver bundle 4. This uniform density of sliver permits the sliver bundle 4 to be formed stably on the carriage 3 and allows the sliver bundle 4 to be accelerated back and forth while minimizing the possibility that the canless, laterally unsupported, sliver bundle 4 will become unstable and topple over.
Once the depositing of the sliver bundle 4 on the surface 3a is complete, the carriage 3 together with the sliver bundle 4 moves in the direction of arrow E out of the sliver-depositing device (sliver coiler arrangement). The control unit 6 controls the movement of the carriage 3 for the changeover from the back and forth movement (arrows A, B) during the sliver deposit to the movement (arrow E) out of the depositing region 8.
In the embodiment of the invention shown in
a shows a view from above of a ring-shaped sliver bundle 4, deposited freely on the top 3a of the carriage 3.
a illustrates a further exemplary embodiment of the movement of the devices according to the claimed invention.
As shown in
The invention has been described in detail with respect to preferred embodiments and it will now be apparent from the foregoing to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects. The invention, therefore, is intended to cover all such changes and modifications that fall within the true spirit of the invention.
Number | Date | Country | Kind |
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102 05 061 | Feb 2002 | DE | national |
This application is a continuation-in-part of U.S. patent application Ser. No. 10/350,016, filed Jan. 24, 2003, which claims priority to German Patent Application No. 102 05 061.9, filed Feb. 7, 2002, the priority of which is claimed herein. The contents of the foregoing applications are incorporated by reference in their entirety.
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Number | Date | Country | |
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Parent | 10350016 | Jan 2003 | US |
Child | 11247276 | US |