WO1991004366A1

WO1991004366A1 - Device for drying yarn

Info

Publication number: WO1991004366A1
Application number: PCT/CH1990/000215
Authority: WO
Inventors: Markus JÄGGI
Original assignee: Rhône-Poulenc Viscosuisse S.A.
Priority date: 1989-09-13
Filing date: 1990-09-11
Publication date: 1991-04-04
Also published as: EP0442991A1; EP0442991B1; DE59009144D1

Abstract

The device of the invention for drying spools of dyed textile yarn comprises a coupling element (1). In the operating mode, the coupling element (1) is connected by a vacuum line (8) with a vacuum tank (9) which can hold all the water from a batch of yarn is located on a support block (5) over which a dome (4) is placed.

Description

Device for dewatering yarn

The invention relates to a device for dewatering yarn dyed on yarn packages on dye carriers.

Bobbin-dyed yarns must be dewatered after dyeing. The dyeings are often carried out in dyeing machines into which inserts are inserted, which in turn consist of a large number of carriers on which the bobbins are placed one above the other. For dewatering, the yarn packages are removed individually from the dyeing apparatus and placed on a dye carrier in a centrifuge.

From JP-A-59137559 such a drainage system for bobbin-dyed yarns is known. This device consists of a centrifuge, the outlet of which is connected to a vacuum pump via a vacuum tank as a buffer. In addition, a device for circulating air is provided.

Although the centrifuge provides satisfactory drainage, it has some significant disadvantages.

The bobbins in the center of the centrifuge are less well dewatered than those which are arranged on the periphery. The time required for loading the centrifuge with the individual yarn packages is very large. The energy requirement of a centrifuge is considerable. Such a centrifuge is a custom-made product that must be designed to accommodate coil holders.

The object of the invention is to provide a drainage system for dyed textile yarns, which enables economical drainage without moving parts and reduced workload.

According to the invention, this object is achieved by a coupling device for receiving a dye carrier insert.

The device according to the invention has the advantages that no rotating, driven parts are used. The dewatering device is considerably simpler in terms of apparatus, the energy expenditure is lower and the loading time is shorter due to the compact use of a dye carrier. No special spool holders are required in the dewatering device.

It is expedient to connect the coupling device to a vacuum tank, the content of which is larger than the volume of the carrier. This has the advantage that the yarn packages can be drained very quickly. The degree of drainage can be controlled depending on the level of the vacuum.

It is also expedient to adapt the central tube of the coupling device to that of the dye carrier insert in such a way that both diameters are approximately the same. This makes the coupling process more precise and easier. The invention will be described in more detail with reference to a drawing. The single figure shows schematically the device according to the invention in the open state.

In Fig. 1, a coupling device 1 is firmly anchored on a base 2 with supports 3, 3 *. The coupling device 1 is placed centrally on a tube 10, which continues as tube 11 in a dye carrier insert 5. Outer yarn packages 6,6 'and inner yarn packages 7,7' are provided on the dye carrier insert 5. The pipe 10 carries a line 8 which is connected to a vacuum tank 9. The vacuum tank 9 has all the devices for automatic measurement and generation of the required vacuum, such as a vacuum pump 14 and a drain line 15. The vacuum system works fully automatically, depending on the respective water level in the vacuum boiler (LS min + LS max) and a vacuum transmitter (0 ... 700 mbar) switches the vacuum pump on or off. A bell 4 is dimensioned such that it can be placed over a dyeing insert 5 in a vacuum-tight manner and fastened on the coupling device 1. In the bell 4, a nozzle 12 with a valve 13 is provided in the upper part. VI, V2, V3 and V4 designate valves. A trough 16 serves to collect dripping water.

In operation, the dye carrier insert 5 is placed on the coupling device 1 as a whole from a dye container. The valve VI on the vacuum container 9 is closed. The vacuum container 9 is under a vacuum of approx. 700 mbar.

After coupling, drainage can be done by opening valve VI. The valves are controlled pneumatically in a known manner. After dewatering has been completed, the yarns can be prepared with an additional unit. For this purpose, the bell 4 is lowered onto the trough 16 in a known manner and, under suppression, the mixture is applied to the yarn via the line 12, with simultaneous suction, for example together with an air mixture. The process is controlled by an automatic system.

The results of suction tests are given in Table I.

5 Table I stained before after 2 min. after 5 min. after 10 min. after 20 min. after 40 mi

No. rohweiss the suction suction suction suction suction suction

Weight gr. 3725 8611 4751 4425 4255 4133 4036 Residual moisture - 0.0 131.2 27.5 18.8 14.2 10.9 8.3

Weight gr. 3736 8613 4760 4425 4255 4130 4030 Residual moisture - 0.0 130.5 27.4 18.4 13.9 10.5 7.9

Weight gr. 3826 7831 5318 4848 4655 4517 4416 residual moisture. 0.0 104.7 39.0 26.7 21.7 18.0 15.4

Weight gr. 3830 7480 5286 4854 4669 4535 4440 residual moisture% 0.0 95.3 38.0 26.7 21.9 18.4 15.9

VacuaΛbar 0.70 - 0.53 0.51 0.49 0.48 0.48

Experiments No. 1 and No. 2 were carried out with polyester and the 5 experiments No. 3 and No. 4 were carried out with polyamide.

Depending on the titer, the residual moisture in polyester is 0 less than 11% within 20 minutes since the start of suction and does not require any thermal re-drying.

Table II gives a comparison of the power requirements for drying bobbin-dyed yarns. Table II

To dewater the same amount of yarn, the device according to the invention requires only 20% of the otherwise usual energy requirement, significantly shorter time and less work.

Claims

Device for dewatering colored yarn spools (7) of medium density on dyeing media (6), marked by a coupling device (1) for receiving a dyeing media insert (5).

2. Device according to claim 1, characterized in that the coupling device (1) is connected via a line (8) to a vacuum tank (9), the content of which is greater than / equal to the volume of the dye carrier insert (5).

3. Device according to claim 1, characterized in that the dye carrier insert (5) with the yarn spools (7,7 ') with a bell (4) can be slipped on.

Apparatus according to claim 3, characterized in that a nozzle (12) is provided in the upper part of the bell (4).