JP2559662B2 - Dyeing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dyeing method capable of excellent dyeing.

[0002]

2. Description of the Related Art The inventor of the present invention discloses Japanese Patent Application Laid-Open No. 3-40859 (hereinafter referred to as Conventional Example 1).
Hereinafter, the same components as those in this embodiment are designated by the same reference numerals. ) As a dyeing method. This conventional example 1
If the amount of dyeing liquid fed to the inside of the object to be dyed 1 (thread winding body 8a) is reduced, the temperature inside the thread winding body 8a becomes higher than that at the outside, and good dyeing cannot be performed (such temperature difference). It is well known in the dyeing art that the dyeing results in poor dyeing.) On the other hand, if the dyeing liquid feed rate is increased in order to increase the dyeing liquid pressure inside the thread winding body 8a,
Due to the two requirements that a thread line is generated in (a) (leakage state) and good dyeing is not possible, an appropriate differential pressure (thread winding 8
The difference between the dyeing liquid pressures inside and outside a) is calculated, and dyeing is performed with this appropriate pressure difference.

However, when the dyeing method according to Conventional Example 1 was repeatedly tried, it was found that, in the case of Conventional Example 1,
When the thread winding density between the thread winding body 8b tested by the dyeing tester b and the thread winding body 8a arranged in the dyeing device a is changed, an appropriate differential pressure must be obtained each time, and an appropriate differential pressure is obtained each time. It was confirmed that uneven dyeing occurs with a small probability when dyeing is performed without obtaining.

For example, a wound body 8b formed by winding a wool yarn.
When an appropriate differential pressure and frequency are obtained by the dyeing tester b using the sample as a sample, if the wound body 8a having the same wound density as the sample is arranged in the dyeing device a, the uneven dyeing does not occur. Since there is a manufacturing error in the wound body 8a, it is inevitable that the winding density is not uniform. This means that if the dyeing tester b finds appropriate differential pressure and frequency using the wound body 8b wound once with the wool yarn as a sample, the wound body 8a wound with the wool yarn is dyed in the dyeing device a. This means that the test by the dyeing tester b cannot be eliminated. That is, if the yarns are the same, the dyeing tester b cannot be used once.

Therefore, if dyeing is performed while maintaining such an inappropriate pressure difference, it is natural that thread winding is likely to occur in the thread winding body 8a, and the temperature difference between the inside and outside of the thread winding body 8a is naturally increased. Is likely to occur and uneven dyeing occurs.

In order to solve such a problem, a dyeing tester b may perform a dyeing test every time dyeing is performed in the dyeing device a, but this is very troublesome.

Therefore, in order to solve the above-mentioned problems, the present invention provides
Japanese Patent Application No. 3-208256 (hereinafter, referred to as Conventional Example 2) is a dyeing method capable of completely eliminating uneven dyeing without correcting the inadequate differential pressure and frequency one by one to set an appropriate differential pressure. Proposed.

The present invention is a further improvement of this Conventional Example 2 and can achieve better dyeing.

That is, in the dyeing methods of Conventional Examples 1 and 2, the inventor of the present invention further provides a dyeing liquid flow passage not only in one direction from the inside to the outside of the bobbin 8a but also from the outside to the inside. , And considered that good dyeing could be possible.

However, the switching of the flow path of the dye liquor supplied by the dye liquor supply device 2a must be performed in a short time. If this switching is not done in a short time, that is, if the dyeing liquid feed rate is too long, the dyeing liquid temperature rises because the heating unit 38a is operating during this time, and the dyeing liquid temperature increases. Poor dyeing occurs due to an increase in temperature (it is well known that dyeing failure occurs when the dyeing liquid temperature is inappropriate).

Therefore, the inventor of the present invention has completed the present application in which a better dyeing can be performed by switching the flow paths in a short time.

[0012]

The gist of the present invention will be described with reference to the accompanying drawings.

[0013] A dyeing method for dyeing an object to be dyed 1 by passing a dyeing solution from the inside to the outside or from the outside to the inside of the object to be dyed 1 which is formed by winding a thread 1'in a tubular shape. A dyeing pot 10a in which the article 1 can be arranged is provided, a dyeing liquid supply device 2a for supplying the dyeing liquid is provided in the dyeing pot 10a, and the dyeing liquid supply amount to the dyeing liquid supply device 2a is variable. A variable amount device 6a is provided, a differential pressure measuring device 4a for measuring and displaying the differential pressure P between the dyeing liquid pressure inside and the dyeing liquid pressure outside the object to be dyed 1 is provided, and the dyeing inside the dyeing pot 10a is provided. A warming unit 38a for heating the liquid is provided, and a dyeing liquid flow path switching unit for switching the flow path of the dyeing liquid supplied by the dyeing liquid supply device 2a from the inside to the outside or the outside to the inside of the object 1 to be dyed is provided. Adopt a dyeing device a,
The article 1 to be dyed is arranged in the dyeing pot 10a of the dyeing apparatus a, and the pressure difference P between the dyeing solution pressure on the inside and the dyeing solution pressure on the outside of the article 1 to be dyed is measured in advance to obtain an appropriate pressure difference P ₁ Adjust the dyeing liquid feed rate varying device 6a so that the dyeing liquid feeding amount varying device 6a is activated, and the heating unit 38a is operated to heat the dyeing liquid to an appropriate temperature while the dyeing liquid passes from the inside to the outside of the object to be dyed 1. to be dyeings 1 for a predetermined time dyeing, followed by the adjusting the dye liquor Okuryou changing device 6a so that the same differential pressure P _1, and pressurized to operate the liquor warming unit 38a similarly the While warming, the dyeing liquid flow path switching unit is operated to make the dyeing liquid pass from the outside to the inside of the object to be dyed 1 in the shortest possible time, and at the time of this switching, the heating unit 38a is operated. The present invention relates to a dyeing method, which comprises stopping and dyeing the article to be dyed 1 in this state for a predetermined time.

[0014]

Since the switching of the dyeing liquid flow path is completed in a short time and the operation of the heating unit 38a is stopped at the time of this switching, the temperature of the dyeing liquid during the switching can be suppressed as much as possible.

[0015]

EXAMPLE A dyeing device a will be described.

FIG. 1 shows a dyeing device a, in which a dyeing pot 10a is provided with a dyeing liquid ejection chamber 15a at the bottom thereof.
An upper plate 17a having a through hole 16a is attached to the upper end of 15a,
A core tube 18a with a flow hole 30a is erected in each of the passage holes 16a, five thread winding bodies 8a are inserted into each of the core tubes 18a, and the thread winding body 8a is tightened by a butterfly screw 19a. . Reference numeral 7a is a lid.

The differential pressure measuring device 4a shown in FIG.
It is equipped with a digital differential pressure display unit 20a, a differential pressure switching unit 21a, a timer 22a, a differential pressure control unit 23a, and an oscilloscope connection unit 24a. When the differential pressure switching unit 21a is switched, the core tube 18a is displayed on the digital differential pressure display unit 20a. Pressure inside, core tube 18a
The pressure outside and the pressure difference P between the two are displayed.

The differential pressure P is detected by the differential pressure detecting code 25a from the dye introducing pipe 11a and the dye extracting pipe 12a, converted into an electric signal and displayed on the digital differential pressure display section 20a.

The timer 22a is for operating the dyeing device a for a predetermined time, and the differential pressure control unit 23a is for correcting and controlling the differential pressure P. The differential pressure control unit 23a can set the differential pressure P of the dyeing device a so as to always be an appropriate differential pressure P.

Further, an oscilloscope is connected to the oscilloscope connecting portion 24a, and the change of the differential pressure P is drawn as a waveform by the oscilloscope to check the suitability of the dyeing state, that is, the presence or absence of leak which causes uneven dyeing.

When the drawn waveform is constant, dyeing is satisfactorily performed. When the waveform is irregularly disturbed, it can be visually confirmed that a leak has occurred at the disturbed place. It is convenient for For example, when a leak occurs and the differential pressure P decreases, a means for increasing the differential pressure P by that amount is taken.

A plurality of thread winding bodies 8a around which the yarn 1'to be dyed is wound are fixed in the dyeing pot 10a by the fixing device 9a, and the dyeing liquid is introduced into the dyeing pot 10a by the dyeing liquid supplying device 2a. When introduced through the pipe 11a, the dye liquor passes through the wound layer of the wound yarn 1'and is discharged from the dye liquor outlet pipe 12a,
As a result, the yarn 1'is dyed.

The dye liquor is circulated by the dye liquor supply device 2a, and the inverter 3 is observed while observing the frequency indicator 5a.
By varying the rotation speed of the drive motor 14a of the pump 13a by a, the differential pressure P between the dyeing liquid pressure inside and the dyeing liquid pressure outside the bobbin 8a is varied, and this differential pressure P is measured by a differential pressure measuring device. The yarn 1'is dyed while measuring with 4a. The drive motor 14a is constructed so that it can be reversed in the shortest possible time by the braking mechanism of the inverter 3a.

Further, the heating section 38a is a steam supply type heating section, and has a structure in which the steam supply rate is controlled by the dye solution supply rate by the dye solution supply device 2a.

The dyeing tester b will be described.

FIG. 2 shows a dyeing tester b, which has a construction in which one bobbin 8b is fastened in a dyeing pot 10b.
The rest of the configuration is the same as that of the dyeing device a in FIG.

In the figure, reference numeral 5b is a frequency indicator, 6b is a dyeing liquid feed rate varying device, 18b is a core tube, 19b is a butterfly screw, 20b is a digital differential pressure display section, 21b is a differential pressure switching section, and 22b is a timer. , 23b is a differential pressure control unit, 24b is an oscilloscope connection unit, 25b is a differential pressure detection code, 7b is a lid, 27b is a moving table, and 27'b is a caster.

A test bobbin 8b, around which the yarn 1'to be dyed is wound, is fixed in the dyeing pot 10b by the fixing device 9b, and the dyeing liquid is fed into the dyeing pot 10b by the dyeing liquid supplying device 2b. When introduced through the introducing pipe 11b, the dyeing liquid passes through the wound layer of the wound yarn 1'and is discharged from the dyeing liquid outlet pipe 12b,
As a result, the yarn 1'is dyed.

The dye liquor is circulated by the dye liquor supply device 2b, and the rotation speed of the drive motor 14b of the pump 13b is changed by the inverter 3b, so that the dye liquor pressure inside the bobbin 8b and the dye liquor pressure outside can be changed. The differential pressure P of V is varied, the yarn 1 ′ is experimentally dyed while the differential pressure P is measured by the differential pressure measuring device 4b, and the data obtained by experimentally dyeing the yarn 1 ′ are also obtained. In addition, the proper data of the dyeing device a is obtained.

Incidentally, the dyeing device a on site is replaced with the dyeing tester b.
It is also possible to use as. Reference numerals 26a and 26b in the figure
Is a pressure gauge, 28a and 28b are pilot lamps, and 29a and 29b
Is a sealing device, 33a and 33b are breakers, 34b and 34b are detection cord connecting parts, 35a and 35b are switches, 36a and 36b are inverter switches, 37a and 37b are frequency changing parts, 38
Reference numeral b is a steam supply type heating unit.

Dyeing is carried out as follows using the dyeing device a and the dyeing tester b having the above structure.

The cylindrical bobbin 8b to be dyed is selected. For example, it is assumed that the wound body 8b formed by winding a wool yarn is selected.

This bobbin 8b is applied to the dyeing pot of the dyeing tester b.
The pressure difference is set to 10b and the dyeing test is repeated to obtain the differential pressure P ₁ when the dyeing is properly performed by the differential pressure measuring device 4b.

Next, set a desired number of cylindrical bobbins 8a wound with the same kind of yarn as the bobbin 8b tested by the dyeing tester b in the dyeing pot 10a of the on-site cheese dyeing device a. Adjusting the differential pressure measuring device 4a while observing the frequency indicator 5a so that the dyeing liquid pressure inside and the dyeing liquid pressure outside the wound body 8a of the dyeing device a becomes the pressure difference P ₁ confirmed above. And activate the heating part 38a to bring the dyeing liquid to an appropriate temperature (55 °
The thread wound body 8a is dyed by passing it from the inside to the outside of the thread wound body 8a while being heated to about C to 130 ° C.), and the dyeing with the differential pressure P _{1 is performed} by the timer 22a for a predetermined time (about several minutes). Continue, increase the dyeing liquid pressure inside the bobbin body 8a for an appropriate time (increase about 20% in frequency), return the dyeing liquid pressure inside the bobbin body 8a to the original value, and repeat this (Fig. 3). Temporary bobbin 8a
Increasing the dye pressure inside the liquid causes a pulsating flow in the dye,
Due to this pulsating flow, the thread line that is being formed in the thread winding body 8a is closed, and the thread is returned to the thread winding body 8a in a normal state in which the thread is wound evenly, and a temperature difference occurs between the inside and outside of the thread winding body 8a. This is to correct this temperature difference. The time for temporarily increasing the dyeing liquid pressure inside the bobbin 8a is until the time when the bobbin 8a bulges outward to try to escape from the inside of the bobbin 8a to the outside. Immediately after swelling, restore the dyeing solution pressure. If the time for raising the dyeing liquid pressure is too long, or the degree of raising the dyeing liquid pressure is too large, the dyeing liquid will be wound on the wound body 8a.
Of the thread wound body 8a, an interval (thread edge) is formed in the wound thread portion of the thread winding body 8a, and the shape of the thread winding body 8a collapses, so that good dyeing is not performed. Further, if the time for raising the dyeing liquid pressure is too short, or the degree of raising the dyeing liquid pressure is too small, the differential pressure eventually causes the wound body 8a to be dyed.
As a result, the pressure difference remains unsuitable for the dyeing, so that good dyeing cannot be performed.

Subsequently, while observing the frequency indicator 5a so that the same differential pressure P ₁ is obtained, the differential pressure measuring device 4a is adjusted and the warming portion 38a is operated to warm the dye solution to an appropriate temperature. The dyeing liquid flow path switching unit is operated to pass the dyeing liquid from the outside to the inside of the thread winding body 8a to dye the thread winding body 8a.
The dyeing with the pressure difference P _{1 is} continued for a certain time (about several minutes) by the timer 22a.

In this embodiment, the switching of the flow paths is completed in a short time by the braking function of the inverter. In this embodiment, this switching is about 5 seconds. Generally, in order to reverse the motor, it is necessary to consider the load on the motor, and it is difficult to reverse the motor in a short time. In this embodiment, as described above, the braking function of the inverter is used, so that the reverse rotation can be performed in a very short time.

Further, in this embodiment, in order to prevent the dyeing liquid temperature from rising as much as possible, the heating section and the flow path are switched so that the operation of the heating section 38a is stopped immediately before the switching of the flow path. It is configured to control in conjunction with.

Further, in this embodiment, the wound body 8a
When passing the dye liquor from the outer side to the inner side, a pulsating flow is generated, and when the dye liquor is passed from the outer side to the inner side of the bobbin 8a, the pulsating flow does not act. This is because when the dye liquor is passed from the outside to the inside, the pulsating flow presses the thread winding body 8a, causing the shape winding of the thread winding body 8a to be deformed.

This embodiment will be specifically described.

Wool yarn was selected as the yarn to be dyed. The wound body 8b of the wool yarn as a sample is set in the dyeing tester b, and an experiment is carried out several times, and an appropriate differential pressure P ₁ without uneven dyeing is confirmed by the differential pressure measuring device 4b. It is assumed that the pressure difference P ₁ is now 0.2 kg / cm ² .

Therefore, a desired number of the wound body 8a wound with the same wool yarn as the tested wool yarn is set on the dyeing device a shown in FIG. 1 at the site so that the differential pressure becomes 0.2 kg / cm ^2. While observing the frequency indicator 5a, adjust the inverter 3a to stain for about 15 to 120 seconds, and then about 3
The differential pressure is set to 0.29 kg / cm ² for ~ 12 seconds, and about 15 ~ again.
The differential pressure is set to 0.2 kg / cm ² for 120 seconds, and then the dyeing liquid flow path is switched and reversed, and dyeing is performed in the same manner (however, in the opposite case, the differential pressure P is not increased. ), And this was repeated for dyeing, and no uneven staining occurred. Since it is desirable to increase the differential pressure of 0.29 kg / cm ² temporarily by about 20% (1.2 times) at the frequency as described above, (1.2) ² × 0.2≈ 0.29
It was calculated from

[0042]

As described above, the present invention is an excellent dyeing method capable of suppressing an increase in dyeing liquid temperature as much as possible, and thus achieving good dyeing.

[Brief description of drawings]

FIG. 1 is a front view in which a part of a dyeing device according to an embodiment is cut away.

FIG. 2 is a front view in which a part of the dyeing tester according to the present embodiment is cut away.

FIG. 3 is a graph for explaining the operation of this embodiment.

[Explanation of symbols]

P differential pressure P ₁ differential pressure a Dyeing device 1 Dye 1'Yarn 2a Dye supply device 4a Differential pressure measuring device 6a Dye feed amount varying device 10a Dyeing pot 38a Heating part

Claims (1)

(57) [Claims] 1. A dyeing method for dyeing an object to be dyed by passing a dye liquor from the inside to the outside or from the outside to the inside of the object to be dyed, which is obtained by winding a thread in a tubular shape. A dyeing pot that can be arranged inside is provided, a dyeing liquid supply device that supplies a dyeing liquid is provided in the dyeing pot, and a dyeing liquid feeding amount changing device that changes the dyeing liquid feeding amount is provided in the dyeing liquid feeding device A differential pressure measuring device for measuring and displaying a differential pressure P between the dyeing liquid pressure inside and the dyeing liquid pressure outside is provided, and a heating unit for heating the dyeing liquid in the dyeing pot is provided. A dyeing device provided with a dyeing liquid flow path switching unit that switches the flow path of the dyeing liquid supplied by the dyeing liquid supply device from the inside to the outside or from the outside to the inside of the object to be dyed is used. disposed in Senshokukama, the proper differential pressure P ₁ measured in advance the pressure difference P between the inner liquor pressure and the outside of the liquor pressure該被dyeings Adjust the dye delivery amount variable device and operate the heating part to heat the dye solution to an appropriate temperature while predetermining the dye object while the dye solution passes from the inside to the outside of the object. Dyeing for a period of time, then adjusting the dyeing liquid feed amount adjusting device so that the differential pressure P ₁ becomes the same as the above, and operating the heating unit to heat the dyeing liquid in the same manner as described above and switch the dyeing liquid flow path. The dyeing liquid is allowed to pass from the outer side to the inner side of the article to be dyed in as short a time as possible by operating the section, and at the time of this switching, the operation of the heating section is stopped, and the article to be dyed in this state. Is dyed for a predetermined period of time.