WO2003097908A1

WO2003097908A1 - Device and method for spinning and depositing a tow

Info

Publication number: WO2003097908A1
Application number: PCT/EP2003/005170
Authority: WO
Inventors: Bernhard Schoennagel; Olaf Schwarz
Original assignee: Saurer Gmbh & Co. Kg
Priority date: 2002-05-22
Filing date: 2003-05-16
Publication date: 2003-11-27
Also published as: US20050062188A1; DE10222437A1; JP2005526192A; KR20050026391A; EP1511887A1; CN1653214A; AU2003233334A1

Abstract

The invention relates to a device and method for spinning and depositing a tow (15). To this end, one or more fiber bundles (7) are melt-spun by a spinning device and are drawn off by a drawing-off mechanism (2). The tow (15) is then deposited into a can (4) by means of a depositing device (3). In order to be able to exert the necessary drawing-off forces onto the tow (15), the tow (15) is guided by partial wrapping on the rollers (9, 10) of the drawing-off mechanism (2) and in an S-shaped guide path. In order to change the extent of wrapping on the rollers, in particular, for the spinning start-up and spreading of the tow (15), the invention provides that some of the rollers (10) of the drawing-off mechanism (2) are displaceably mounted on the machine frame (12) thereby enabling the guide path of the tow (15) to be altered.

Description

Device and method for spinning and depositing a spinning saber

The invention relates to a device for spinning and depositing a spinning cable according to the preamble of claim 1 and a method for spinning and depositing a spinning cable according to the preamble of claim 10.

A generic device and a generic method are known from EP 0 875477 A2.

In the production of staple fibers, it is known that, in a first process step, a spinning cable is first spun from a polymer melt and placed in a jug. In a second process step, several spinning baskets are removed from the respective cans, brought together to form a tow and cut to the staple fibers by means of a fiber cutter. The generic device is used exclusively for carrying out the first process step, from which the invention is also based.

For spinning and depositing a spinning cable, the known device has a spinning device for spinning several fiber bundles, a take-off device with several rollers for pulling off the spinning cable formed from the fiber bundles and a depositing device for depositing the spinning cable in a can. To apply the required withdrawal forces, the take-off unit has a plurality of rollers arranged offset one behind the other, so that the spinning cable with partial wrap on the rollers is guided through the take-off unit in an S-shaped guideway. The spinning cable is guided on the middle rollers with a partial loop of preferably a maximum of 180 °. These deflections are necessary on the one hand to generate high withdrawal forces, on the other hand they lead to considerable problems when the spinning cable is put on at the start of the process. Here the spinning cord manually inserted into the predefined S-shaped guideway. Accordingly, large manual forces have to be applied in particular in the case of relatively thick spinning cables.

In contrast, it is an object of the invention to develop a device and a method of the type mentioned in such a way that the spinning cable can be spun on and put on at the start of the process by simple handling.

Another object of the invention is to make the withdrawal of the spinh cable from the spinning device as flexible as possible.

This object is achieved according to the invention by a device with the features according to claim 1 and by a method with the features according to claim 10.

Further advantageous developments are given by the features and combinations of features of the respective dependent claims.

The invention has the particular advantage that the degree of wrap between the spinning bucket and the rollers of the take-off unit can be changed and adjusted. This allows states with a high degree of wrap to build up high pull-off forces or states with a low degree of wrap to build up correspondingly low pull-off forces or also for applying and spinning on the spinning cable. The setting range of the wrap angle is between 0 ° and 180 ° on the middle rollers of the take-off unit. For this purpose, at least some of the rollers on the take-off mechanism are movably held on the machine frame in such a way that the guideway of the spinning cable can be changed. The mobility of the rollers on the take-off mechanism only serves to set a specific guideway of the spinning cable or a specific wrap angle. During the spinning and laying down of the spinning cable, the moving ones are Rollers fixed in their respective positions on the machine frame, so that no undesirable change in the guideway or the wrap angle can occur.

In a particularly advantageous further development of the invention, it is provided that the movable rollers can be made adjustable between a contact position and an operating position. In this case, the spinning cable is guided through the rollers of the take-off unit essentially without a partial loop on a straight guideway. Only after the movable rollers have been adjusted to their operating position and fixed, is the spinning bucket with the respective partial wrap on the rollers guided in an S-shaped guideway to apply the pulling forces.

In order to be able to carry out the laying of the spinning cable as easily as possible, a distance is formed between the non-movable rollers and the movable rollers in the application position, so that the spinning cable can be inserted into the take-off mechanism without substantial contact.

After the spinning cable has been laid in the take-off unit, the rollers which are movably held on the machine frame are moved from the laying position to the respective operating position. For this purpose, the movable rollers can be adjusted synchronously at the same time. This means that short times can be achieved when piecing and putting on the spinning cable.

However, it is also possible to move the movable rollers one after the other from their contact positions into the operating positions. This prevents a sudden increase in the pull-off voltage in the spinning cable. The pull-off voltage in the spinning cable can thus be built up slowly.

The advantageous development of the invention, in which the storage device has two co-operating reel rollers, at least one of which Reel rollers are designed to be movable for adjustment between an operating position and a lay-on position, is particularly suitable for automating the lay-on and spinning of the spinning cable. In this case, a distance is formed between the reel rollers when the reel rollers are in contact position, which enables the spinning cable to be inserted.

The take-off unit and the depositing device are advantageously arranged one behind the other in such a way that when the movable rollers of the take-off unit are in contact and when the movable reel roller of the depositing device is in contact, the spinning cable can be inserted in a common straight guide track.

In the case of an arrangement in which the spinning device, the take-off device and the storage device are arranged one above the other in stages, the spinning cable can easily be automatically guided by the spinning device through the take-off device and the storage device into a waste can provided. As soon as the piecing process and the laying of the spinning cable are finished, the movable rollers and the movable reel are guided into their respective operating positions and the production process can begin.

The device according to the invention and the method according to the invention are particularly suitable for spinning and depositing thick spinning cables with large spinning titers of the fiber bundles of, for example,> 12,000 dtex. The spinning device can in this case have a plurality of spinnerets arranged parallel to one another for producing a plurality of fiber bundles or a spinneret with, for example, at least 8,000 nozzle bores. With such spinnerets, high melt throughputs of over 500 kg / h can be achieved, which lead to a correspondingly thick spinning cable. Thus, the device according to the invention is also suitable for being combined with several to form a complete system. With reference to the accompanying drawings, some embodiments of the device according to the invention and the method according to the invention are described in more detail below.

They represent:

Fig. 1 is a schematic view of a first exemplary embodiment of the device according to the invention

Fig. 2 is a schematic view of another embodiment of the device according to the invention

In Fig. 1, a first embodiment of the device according to the invention is shown schematically in a view. Here, Fig. 1.1 shows the device during piecing and fitting, the spinning cable and Fig. 1.2 shows the device in operation when the spinning cable is manufactured. The following description applies to both figures insofar as no express reference is made to one of the figures.

The device contains a sprayer device 1, a take-off unit 2 arranged below the spinning device 1, a subsequent depositing device 3 and a can 4 held below the depositing device 3. The can 4 is held by a can pivot 5.

The Spirmeinrichtung 1 has two spinnerets 6.1 and 6.2, which are arranged in parallel next to each other. Each of the spinnerets 6.1 and 6.2 is connected via a melt feed 17.1 and 17.2 to a melt source, not shown here. The undersides of the spinnerets 6.1 and 6.2 have a large number of nozzle bores, from each of which a fiber is extruded. Here, the spinnerets 6.1 and 6.2 can have more than 80,000 nozzle bores. Each of the spinnerets 6.1 and 6.2 thus extrudes a fiber bundle 7.1 and 7.2. Below the spinnerets, the Spinning device 1 usually has cooling devices which generate a cooling air flow for cooling the fiber bundles. The cooling device is not shown in this example. The number of spinnerets of the spinning device 1 is also exemplary. For example, three, four, five or even more spinnerets can be arranged in parallel next to each other, the fiber bundles of which are each brought together to form a spinning cable.

In order to bring the fiber bundles 7.1 and 7.2 together to form the spinning cable 15, a plurality of preparation elements 8.1, 8.2, 8.3 and 8.4 are arranged between the spinning device 1 and the take-off unit 2. A preparation agent is applied to the fiber bundles 7.1 and 7.2 or the spinning cable 15 by the preparation elements 8.1 to 8.4. The preparation elements 8.1 to 8.4 are formed as preparation rollers in this embodiment. However, preparation sticks could also be used.

The take-off mechanism 2 is arranged below the preparation rollers 8.1 to 8.4. The take-off unit 2 contains several rollers 9.1, 9.2 and 9.3 arranged one behind the other in a vertical plane. The rollers 9.1, 9.2 and 9.3 are adhered to ^'a machine frame 12th Between the rollers 9.1 and 9.2, a linear guide 11.1 is formed in the machine frame 12, in which a roller

10.1 is movably guided. Between the rollers 9.2 and 9.3, a linear guide 11.2 is likewise formed in the machine frame 12, in which the roller

10.2 is movably guided. The rollers 10.1 and 10.2 can be adjusted in the respective linear guides 11.1 and 11.2 between a contact position and an operating position. The rollers 10.1 and 10.2 are guided transversely to the running direction of the spinning cable 15.

1.1 shows the situation in which the movable rollers 10.1 and 10.2 of the take-off unit 2 are held in a contact position on the machine frame 12. For this purpose, the movable rollers 10.1 and 10.2 in the respective linear guides 11.1 and 11.2 are shifted to the right side of the machine frame, so that the spinning cable 15 is in a straight line Guideway is guided without partial wrap on the rollers 10.1 and 10.2. A distance is formed between the non-movable rollers 9.1, 9.2 and 9.3 and the movable rollers 10.1 and 10.2, so that the spinning cable 15 essentially without contact in the middle of the take-off mechanism 2 between the non-movable rollers 9.1, 9.2 and 9.3 and the movable ones Rolls 10.1 and 10.2 can be performed. In this arrangement, it is particularly advantageous to insert the spinning cable 15 into the take-off mechanism 2 in a simple manner after spinning.

After the spinning cable 15 is inserted into the take-off unit 2, the movable rollers 10.1 and 10.2 in the linear guides 11.1 and 11.2 on the machine frame 12 are shifted to the left, so that the movable rollers 10.1 and 10.2 change the vertical plane of the non-movable shafts 9.1, 9.2 and 9.3 penetrate and form the S-shaped guideway required for pulling off the spinning cable 15. This situation is shown in Fig. 1.2. The non-movable rollers 9.1 to 9.3 and the movable rollers 10.1 and 10.2 are arranged one behind the other in such a way that the spinning cable 15 passes through each of the rollers with a predetermined partial wrap. In this situation, the movable rollers 10.1 and 10.2 are locked in the machine frame 12. The rollers 9.1 to 9.3 and the rollers 10.1 and 10.2 are driven to guide the spinning cable 15. Each of the rollers is preferably driven by a separate drive. However, it is also possible to drive groups of rollers by means of a group drive.

The storage device 3 is arranged below the take-off unit 2. The storage device 3 is formed by two co-operating reel rollers 13.1 and 13.2. The reel rollers 13.1 and 13.2 are driven at the same speed, so that the spinning cable 15 runs evenly into the can 4 set up below the storage device 3.

The can 4 is moved by means of the can pivot 5 in such a way that when the spinning cable 15 is laid down, the can 4 is evenly filled. 2 shows a further embodiment of the device according to the invention. The structure of the device shown in FIG. 2 is essentially identical to the previous exemplary embodiment according to FIG. 1, so that reference is made to the preceding description and only the differences are explained in more detail here.

In the exemplary embodiment shown in FIG. 2, the spinning device 1 has only one spinneret 6 for producing a fiber bundle 7. The fiber bundle 7 is brought together to form the spinning cable 15 via the preparation elements 8.1 to 8.4.

The trigger mechanism 2 is identical to the previous embodiment. The situation is shown here in which the movable rollers 10.1 and 10.2 are held in the contact position.

The storage device 3 is arranged below the take-off unit. The storage device 3 is formed here by a fixed reel roller 13 and a movable reel roller 14. The movable reel roller 14 is guided in a guide 18. The movable reel roller 14 can be adjusted between an operating position and a landing position. 2 shows the situation in which the movable reel roller 14 remains in the contact position. A distance is formed between the reel rollers 13 and 14 so that the spinning bucket 15 can be inserted in a straight guideway from the spinning device 1 to the can 4. This exemplary embodiment of the device according to the invention is therefore particularly suitable in order to be able to carry out automated piecing and application of the spinning cable 15. All that is required here is monitoring by an operator when the fiber bundle is spun on. The spinning cable 15 can be put into the take-off unit 2 and the depositing device 3 automatically by falling in. As soon as the spinning cable 15 has passed from the spinning device 1 into the can 4, the movable rollers 10.1 and 10.2 of the take-off unit 2 and the movable reel 14 of the depositing device 3 are returned to their respective operating positions and fixed. The adjustment of the rollers 10.1 and 10.2 and the reel roller 14 can be carried out by a common drive. A synchronous adjustment of the trigger mechanism and the depositing device can thus be achieved. However, it is also possible for the reel roller 14 to be guided independently of the rollers 10.1 and 10.2 of the take-off unit 2.

In the exemplary embodiments of the device according to the invention shown in FIGS. 1 and 2, there is in principle also the possibility that during operation the movable rollers of the take-off mechanism are previously guided into any position for setting certain wrap straight lines. Thus, several operating positions could be specified, which are selected as a function of the spin titer of the spin cable, for example in order to obtain certain withdrawal forces.

The exemplary embodiments shown in FIG. 1 and in FIG. 2 are suitable for setting the rollers 10.1 and 10.2 in different operating positions with wrap angles of greater than 0 ° and less than 180 °.

The structure of the exemplary embodiments shown is also exemplary. In this way, additional treatment facilities and similar training variants can be implemented. For example, all rollers of a take-off unit could be designed to be movable in order to obtain even greater flexibility in the design of the guideway and in the choice of the wrap angle. Likewise, the adjustment of the storage device can be formed by two movably held reel rollers. LIST OF REFERENCE NUMBERS

1 spinning device

2 trigger mechanism

3 storage device

4 jug

5 Can swinging

6, 6.1, 6.2 spinneret

7, 7.1, 7.2 fiber bundles

8.1, 8.2, 8.3, 8.4 preparation elements

9.1, 9.2, 9.3 rollers

10.1, 10.2 movable rollers

11.1, 11.2 linear guide

12 machine frame

13, 13.1, 13.2 reel roller

14 movable reel roller

15 spinning cord

16 Can swinging

17, 17.1, 17.2 melt feed 8 guide

Claims

claims

1. Device for spinning and depositing a spinning cable (15) with a spinning device (1) for spinning one or more fiber bundles (7), with a take-off device (2) for pulling off the spinning cable (15) formed from the fiber bundle or fibers, wherein the take-off unit (2) has a plurality of rollers (9, 10) held offset from one another on a machine frame, and the spinning cable with partial wrap on the rollers is guided in an S-shaped guideway, and with a storage device (3) for storing the spinning cable (15 ) in a can (4), characterized in that at least some of the rollers (10.1, 10.2) of the take-off mechanism (1) are held on the machine frame (12) in such a movable manner that the guideway of the spinning cable (15) can be changed ,

2. Apparatus according to claim 1, characterized in that the movable rollers (10.1, 10.2) are adjustable between a contact position and an operating position, the rollers (9, 10) of the

When the movable rollers are in contact with the take-off unit (2), guide the spinning bucket (15) on a straight guide path without partial wrap.

3. Apparatus according to claim 2, characterized in that between the movable rollers (10.1, 10.2) and the non-movable rollers (9.1,

9.2, 9.3) a distance is formed in the contact position in order to guide the spinning cable (15) without substantial contact to the rollers (9, 10).

4. Apparatus according to claim 2 or 3, characterized in that the movable rollers (10.1, 10.2) on the machine frame (12) are adjustable synchronously between the application position and the operating position.

5. Apparatus according to claim 2 or 3, characterized in that the movable rollers (10.1, 10.2) on the machine frame (12) are successively adjustable between the application position and the operating position.

6. Device according to one of claims 1 to 5, characterized in that the storage device (2) has two cooperating reel rollers (13, 14) and that at least one of the reel rollers (14) is designed to be movable between an operating position and a contact position , being in the feed position between the reel rollers

(13, 14) a distance for inserting the spinning cable (15) is formed.

7. The device according to claim 6, characterized in that the extraction unit (2) and the storage device (3) are arranged one behind the other such that when the movable rollers (10.1, 10.1,

10.2) of the take-off unit (2) and when the movable reel roller (14) of the depositing device (3) is in contact, the spinning cable (15) can be inserted in a common straight guideway.

8. Device according to one of claims 1 to 7, characterized in that the spinning device (1), the take-off unit (2) and the storage devices (3) are arranged one above the other in tiers.

9. Device according to one of claims 1 to 8, characterized in that the spinning device (1) to form the spinning cable (15)

Preparation device (8.1, 8.2, 8.3, 8.4).

10. A method for spinning and depositing a spinning cable, in which the spinning cable is drawn off after spinning by a take-off device with a plurality of rollers, in which the spinning cable is partially wrapped around the

Rolls is guided in an S-shaped guide path and in which the spinning cable is deposited in a can by means of a storage device is characterized in that the guideway of the spinning cable is adjustable by adjusting rollers of the take-off unit which are held in a movable manner.

11. The method according to claim 10, characterized in that before the start of the process for piecing and for applying the spinning cable without

Partial wrap on the rollers is guided in a straight guide path through the take-off unit.

12. The method according to claim 11, characterized in that prior to the start of the process for piecing and for applying the spinning cable without substantial contact in extension of the straight guide path through the storage device.