JPS61215755A - Method and apparatus for dyeing yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The subject matter of the present invention is a method and apparatus for dyeing yarn, particularly for continuously dyeing yarn.

BACKGROUND OF THE INVENTION The method of marooning yarn which is conventionally practiced is to mix the dyeing proportionately so that a parcel having a considerable length of yarn gives the required dyed hue to the yarn of that parcel. It was a batch dyeing method in which the dye was immersed in a vat. Batch processing has a number of significant difficulties and drawbacks. For example, a considerable amount of time is usually required for the dyeing liquid to penetrate into the innermost layers of the threads of the wrapper, and even more time is required for the finished dyeing reaction. As the dyeing pigment is subsequently removed from the dyeing liquid on its path through the yarn wrapper,
As the dyeing liquid becomes progressively more scarce, ie it has a continuously decreasing proportion of dyeing material in the liquid and moves into the interior of the package, the hue changes accordingly. Moreover, some of the dyeing raw materials that make up the mixture have a greater affinity for the yarn material than others, so that the proportions of pigments vary with each other, and thus the color varies as well as the hue.

Another hassle is that sometimes the thread shrinks in the wrapper,
This causes difficulty in unwinding the wrapper as well as hindering dye penetration and causes the inner layers to become compressed.

The wet package must be thoroughly dried, which requires a considerable amount of time and space.

Also, when a new batch of undyed yarn is dyed in a different color, all processing equipment and vats must be thoroughly cleaned so that no trace of the original dyeing remains. This operation is time consuming and labor intensive.

It is also difficult to ensure that successive batches of dyeing mixtures have exactly the same color. If the dyed wrapper produces any undesirable combination in which the entire length of the threads of the wrapper cannot be seen until drying, the color is unsuitable.

A effluent is usually left with unused and expensive dyeing material which also has cost implications.

Apart from the difficulty of implementing this process, the required equipment is bulky and expensive.

In order to eliminate the difficulties associated with batch dyeing schemes, it has been attempted to dye yarns in succession, i.e. a single strand of undyed yarn is moved forward in succession;
The dyeing mixture is applied to the thread as it passes through special locations.

All known continuous processes require mixing before use of the dyeing components in the dyeing liquid reservoir or the dyeing liquid stream through which the yarn passes. Examples of this known device are the following patent specifications: US 2,310,764, US 3,620,6
62 and UK No. 2111091.

A somewhat different continuous yarn dyeing process for pears is described in patent specification Egypt No. 0079.213. Some known devices provide for changes in the color of the yarn by having a number of reservoirs with different dyes or streams of different color dyes, and the yarn moves from one reservoir or from one dye stream to another as the color changes. do.

All known methods and devices are complex or time consuming in one way or another. For example, these processes use many reservoirs or many streams of dyeing liquid,
Requires somewhat complex equipment to move the yarn from one reservoir or stream to another. Combining many dye mixtures to have the correct color is time consuming and requires a lot of skill and care. Applying too much dyeing liquid to the yarn is also a waste of dyeing liquid.

Problems to be Solved by the Invention The purpose of the present invention is to eliminate the complicated mechanical equipment and the need for separately mixing dyeing and filling separate reservoirs with the dyeing mixture, while continuously A method and apparatus for dyeing threads continuously, which allows for very precise control of the hue and color of the threads applied to the moving threads, and still makes it possible to change the hue and/or color on the fly. The goal is to provide the following.

20 Means for Solving the Problems According to the present invention, in a method for continuously dyeing yarn by applying a dyeing liquid to the yarn while the yarn is moving,
The yarn is coated with at least one dyeing liquid in a series of individual volumes, the volume of the volume and the amount applied per unit length of yarn being predetermined to have the desired appearance of the dyed yarn. It is characterized in that the

When it is desired to dye a yarn, a number of different dyeing liquids, which are not primary colors, are simultaneously applied to the moving yarn in separate columns, with each dyeing liquid being applied by volume and per unit length of yarn. The number of volumes of valley dyeing liquid applied is predetermined so that the dyed yarn has the desired color and hue.

For the purpose of staining, a staining liquid is diluted in water.

The color and hue of the dyed yarn is automatically controlled by passing the dyed yarn through a color analyzer, e.g. a spectrophotometer, and the spectrophotometer can detect the change in the color spectrum of the dyed yarn from the desired color and analyze it. The device detects the change and initiates a change in the volume of the volume and/or the number of volumes applied per unit length of one or more staining liquids applied to restore the desired spectrum. A corrective signal placed on the spectrum is active upon the occurrence of any undesired change in the spectrum.

Quantities of dyeing liquid are introduced together onto the yarn itself or into the yarn in a continuous mixing operation.

A device for carrying out this method has a yarn feeding device for feeding the yarn to be marooned at the front, a device for holding a dyeing liquid to be applied to the yarn, and a device for applying the dyeing liquid to the yarn, The device for applying the dyeing liquid to the yarn incorporates a device arranged to supply the dyeing liquid to the yarn at each individual thread, and the device is adapted to vary the volume of the volume and the speed at which the dye is applied to the thread. It is characterized in that it is provided for changing.

A device actively connected to the yarn feeding device determines the amount of time during which successive volumes of dyeing liquid are applied to the yarn depending on the volume of dyeing liquid applied to the yarn and/or the speed at which the yarn is fed by the yarn feeding device. arranged to control the spacing.

The dye applicator incorporates a valve arrangement controlled by individual pulses of a pulse signal, the frequency of which can be controlled.

When many dyeing liquids are applied to the yarn at the same time, many dyeing applicators are arranged at angles and spaced from each other around the yarn, and the valley dyeing applicators can control the volume of the dyeing liquid volume. It has nine own control devices, and the number of times the amount is applied.

Each stain applicator incorporates a pump arranged to supply dye liquid in pulses to the stain-applicator. Only one type of pump is suitable! A pump of the type known as a kIII injection pump, in which a flexible tube is stroked in succession by each successive pressure device against the tube, flattening the tube and moving it forward a certain distance. , then releases the tube, so the amount of liquid inside the tube becomes trapped and propels it forward in a pulse.

Another type of pump suitable for carrying out this method is a pump with a tangential opening, in which the fluid is supplied to the vanes from inside the table and, when the wheel rotates, a series of volumes are forced into the tangential discharge passage by centrifugal action. It is a blank type pump that combines the impeller working inside the casing with the liquid being dispensed. Pumps of the type described are coupled to a synchronous motor fed by a power supply with a controllable frequency.

Alternatively, a diaphragm-type pump is used, with the diaphragm connected to a vibrator mechanism arranged to be fed from a pulsed current source.

When spectrophotometers are used to monitor the color of dyed yarn light sensitive devices, each positioned to receive light from a particular portion of the spectrum to its light sensitive device rt, Depending on the intensity of the light and having a corresponding control signal used in the dyeing liquid application device, the volume of the volume and/or the number of delivery of successive amounts of dyeing liquid onto the yarn is varied according to said control signal.

Practical embodiments of the invention are illustrated in the accompanying schematic drawings.

E. In the Examples and Functional Drawings, first refer to FIG. 1, 1 indicates a yarn to be dyed, and 2, 3, and 4 are arranged so as to project individual dyeing liquids onto the yarn 1. A dyeing liquid projection device is shown, and each dyeing liquid projection device is connected to a dyeing supply tank 5.6.
and 1.

Variable frequency power source for each staining liquid projection device 8.
9 and 10. Now, referring to FIG. 2, the dyeing liquid projection device incorporates pumps 11, 12 and 13 discharging into a chamber 14 arranged such that the thread 1 passes through it, and the dyeing liquid comes into contact with the thread 1. mixed instantly.

Pumps 11, 12 and 13 are variable frequency power supplies8.
9 and 10 are connected to a synchronous motor located in the motor. In FIG. 6, the spectrophotometer 15 has a spectrum 16 of the color of the thread 1 after it has been marooned.

Light sensitive devices ir, ia and 19 are arranged to detect respective luminous intensity values of different parts of the spectrum 16 and produce corresponding control signals which are sent as frequency control signals to variable frequency power sources 8, 9 and 1o. Ru. In FIGS. 2 and 3, 20 indicates a device for feeding the thread 1 forward.

In practice, the dyeing liquid is applied in a series of quantities to the yarn, either as a single dye or as many dyes, and the volume of the six quantities and the speed at which the tortoise is applied are the hues and colors required?
The amount of yarn dyeing is adjusted to have the same amount as the dyeing amount. Changes in the lid volume or number of times of any or all staining applied can also be made instantly in a dichromatic manner. Any undesired change in thread hue or color immediately results in a change in the spectrum 16. This results in an immediate f6 response of suitable light sensitivity**ir and/or 18 and/or 19 so that the control signal can be suitably varied in frequency power supply, or multiple frequencies te9 and/or 1o and/or 11. the volume and number of times dyeing liquid is applied to the yarn by pumps 11 and/or 12 and/or 13 until the spectrum 16 returns to the desired color and hue indicating that the requested color and hue have been restored; causes a change in

The apparatus and method have the advantage of not using excessive staining.

Since the number of attachments of children is such that the amount overlaps with the previous amount attached, or immediately follows the previous amount, or a gap remains between consecutive amounts, the gap is the gap between the two. Manchuu is small enough to allow the old chestnut color to penetrate into the sea urchin thread. The iridescent effect is reduced by adjusting the number of violets, leaving an appropriate gap Iri between consecutive lids where the dye does not adhere to the thread.

The part of the device that actually dispenses the dyeing liquid onto the yarn is arranged in such a way that it has the minimum amount of dyeing liquid, so that the change in color can be achieved by switching on the distribution device or a number of distribution devices for different supply tanks for different dyeing products. This is done by putting it in. Variations of different colors having the same component color but mixed in different proportions can be made immediately by changing the installation of the device that controls the volume of the dyeing liquid and the speed at which the color is applied. It is done.

If totally different colors appear consecutively in the same system, a number of groups of dye distribution devices are provided, each of which is activated when the special color given by the group is applied. .

The invention is used to carry out the method of dyeing which is the subject of the earlier patent application Egypt No. 0079213.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the basic shape of the device, Figure 2 is a schematic diagram showing the equipment using nine bonders connected to individual synchronization/motors, and Figure 6 is a spectrophotometric needle. 1 is a schematic diagram showing a device with automatic color control; FIG.

Claims (8)

[Claims] (1) in a method of continuously dyeing said yarn by applying a dyeing liquid to said yarn while the yarn is in motion, applying a series of discrete amounts of at least one dyeing liquid to said yarn; At that time, the volume of each amount and the number of amounts applied per unit length of the yarn are determined in advance so as to obtain a dyed yarn with a desired appearance. How to dye. (2) Simultaneously applying separate quantities of a number of different dyeing liquids to said moving yarn, each dyeing liquid being applied by volume of each quantity of each dyeing liquid and for each unit length of said yarn; 2. A method for continuously dyeing yarn according to claim 1, wherein the number of dyed yarns is determined in advance so that the dyed yarn has a desired color and hue. (3) obtaining a spectrum of the color of the dyed yarn and restoring the desired spectrum upon the occurrence of any undesired change in the spectrum of the color of the dyed yarn from the spectrum of the desired color; A continuous yarn according to claim 1 characterized in that the volume of each quantity and/or the number of quantities applied per one or more unit lengths of the dyeing liquid is varied. How to dye. (4) Yarn supply device (20
) and a device (5) for holding the dyeing liquid to be applied to the yarn.
, 6, 7) and a device for applying a dyeing liquid to the yarn, wherein the device for applying the dyeing liquid to the yarn applies individual amounts of the dyeing liquid to the yarn. Incorporating devices (2, 3, 4 or 11, 12, 13) and devices (8, 9, 10) arranged to supply
) is provided for varying the volume of each quantity and for varying the speed at which said quantity is applied to said yarn. (5) the incorporating devices (8, 9, 10) are arranged continuously according to the volume of each amount of dyeing liquid applied to said yarn and/or said speed at which said yarn is being fed forward by said yarn feeding device (20); The yarn according to claim 4, characterized in that it is actively connected to the yarn supply device (20) so as to control the time interval during which the amount of yarn is applied to the yarn. A device that dyes continuously. (6) The dye application device (2, 3, 4) incorporates a valve device controlled by individual pulses of a pulse signal, the frequency of which is controllable. A device that continuously dyes yarn. (7) Patent characterized in that each dye application device incorporates a pump (11, 12, 13) arranged to supply dye liquid in pulses to the dye-apply device (2, 3, 4 or 14). An apparatus for continuously dyeing yarn according to claim 4. (8) a spectrophotometer (15) arranged to monitor the color of said dyed yarn, forming therein a spectrum (16) of the color of said yarn, and each light-sensitive device with a spectrophotometer (15) arranged to monitor the color of said yarn; a device (8 or 9 or 10) arranged to receive said light from one part of said spectrum and having a control signal therein and active under the control of said control signal by the intensity of that particular part of said spectrum; from a particular part of the volume and/or the spectrum of each quantity by incorporating the light sensitive device (17, 18, 19) arranged to use the control signal into a corresponding staining liquid application device with 5. An apparatus for continuously dyeing yarn according to claim 4, characterized in that the number of times of delivery of successive amounts of dyeing liquid to said yarn is varied by said control signal.