JPH07324278A - Apparatus for treatment of textile - Google Patents

Abstract

PURPOSE:To provide a textile-treating apparatus capable of evacuating the inside of a treatment tank by connecting a vacuuming unit to the tank and free from unlevel dyeing due to air bubbles when dyeing a textile according to the package dyeing method. CONSTITUTION:A vacuuming unit such as a vacuum pump 15 is connected to a dyeing treatment tank 2 of this package dyeing machine to exhaust air in the tank. The vertical distance between the liquid surface 12 of the above- mentioned treatment tank and a dye liquid circulation pump 8 is made wider by pressure loss in the suction side pipe than NPSH of the circulation pump to prevent generation of cavitation. A heat exchanger 9 for heating the dye liquid is set in a space between the treatment tank and the discharge end 11 of the circulation pump to make evacuation and the dyeing temperature quick and uniform, thus affording the objective package dyeing machine free from formation of unlevel dyeing of a textile (e.g. cotton yarn or another fiber).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber processing device for performing a fiber dyeing process such as a cotton dyeing process on a fiber.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional package dyeing device. This device is intended for the package dyeing of the cotton yarn 1, and has a processing tank 2 and a carrier 3. Therefore, for example, the cotton yarn 1 can be wound around a large number of cheeses, supported on the carrier 3, and housed in the processing tank 2. The processing tank 2 has a cylindrical shape and has an upper lid 4,
It is connected to the on-off valve 5, the feed pump 6, and the dye solution storage tank 7. Therefore, after the carrier 3 is housed, the upper lid 4 is closed, the on-off valve 5 is opened, and the feed pump 6 is driven, whereby the dye solution can be fed by the feed pump 6 and the dye solution can be introduced into the processing tank 2.

Furthermore, this device has a circulation pump 8 and a heat exchanger 9. The circulation pump 8 is for circulating the processing liquid in the processing tank 2, and is arranged below the processing tank 2.
The suction end 10 and the discharge end 11 are connected to the bottom end of the processing tank 2, and the feed pump 6 and the opening / closing valve 5 are connected between the processing tank 2 and the suction end 10 of the circulation pump 8. Heat exchanger 9
Is for heating the dye solution in the processing tank 2, is composed of a steam pipe, is provided at the bottom end of the processing tank 2, and its position communicates with the suction end 10 of the circulation pump 8. Therefore,
After the introduction of the dye solution, the heat exchanger 9 is actuated, the on-off valve 5 is closed, and the circulation pump 8 is driven, whereby the dye solution in the processing tank 2 is heated by the heat exchanger 9 at the bottom end of the processing tank 2,
This is sucked into the suction end 10 of the circulation pump 8 and the discharge end 1
1 is discharged and sent to the bottom end of the processing tank 2, and the carrier 3
It passes through the inside and is supplied to the cotton yarn 1. Further, the dye solution flows through the cotton thread 1 of the carrier 3 and flows to the bottom end of the processing tank 2,
The liquid surface 12 circulates and is maintained at a constant height position in the processing tank 2. Therefore, the dye solution comes into contact with and permeates the cotton yarn 1 of the carrier 3, and the cotton yarn 1 is package-dyed.

However, this device has several problems. For example, air may be trapped in the cotton yarn 1 of the carrier 3, and when the dye liquid contacts and permeates the cotton yarn 1 of the carrier 3, it is blocked by the trapped air, and the dye liquid in the entire cotton yarn 1 is blocked. Do not uniformly contact and penetrate, which may cause uneven dyeing of the cotton yarn 1. Further, in order to accurately perform the package dyeing, it is preferable that the temperature of the dye solution is quickly made uniform after heating the dye solution, but it takes a long time until the temperature of the dye solution is made sufficiently uniform. This may cause uneven dyeing of the cotton yarn 1.

Further, recently, in order to save the dye, the dye liquid in the processing tank 2 is often kept in a relatively small amount, and the liquid surface 12 thereof is often kept at a position as low as possible. Along with this, the vertical distance H between the liquid surface 12 of the processing tank 2 and the circulation pump 8
Is significantly reduced, and the vertical distance H is NPS of the circulation pump 8.
It is considerably smaller than H. Therefore, the liquid pressure at the suction end 10 of the circulation pump 8 is low and its boiling point is low. Moreover, what is sucked into the suction end 10 of the circulation pump 8 is the dye solution heated by the heat exchanger 9, and the temperature thereof is extremely high. Cavitation occurs in 10, and the dye solution cannot be accurately fed and cannot be circulated. Therefore, normally, the compressor 13 and the opening / closing valve 14 are connected to the top end of the processing tank 2, compressed air is supplied into the processing tank 2, the air pressure thereof acts on the liquid surface 12 of the processing tank 2, and the suction end 10 is driven by the air pressure. The liquid pressure of is increased, its boiling point is raised, and cavitation is prevented. Therefore, the cotton thread 1 of the carrier 3
Receives air pressure, which is also a cause of the air inside the cotton yarn 1 being trapped.

When the circulation speed of the dye solution is increased, the air inside the cotton yarn 1 can be pushed out by the dye solution and can be removed to some extent. However, in order to increase the circulation speed, the circulation pump 8 has a large capacity. Must be used, and the initial cost is high. In the case of a pump having a large capacity, a large amount of electric power is required to drive the pump, the running cost is high, and it is not practical.

Not only the cotton thread 1 but also other fibers can be subjected to package dyeing, but it is the same that uneven dyeing of fibers may occur due to the temperature of the internal air of the fibers and the dye solution. Further, the scouring liquid can be introduced into the processing tank 2 to package-refin the fibers, and the bleaching liquid can be introduced into the processing tank 2 to bleach the packages into the package. Similarly, the internal air and the temperature of the scouring liquid or the bleaching liquid may cause uneven scouring or bleaching of the fibers.

[0008]

OBJECTS OF THE INVENTION Accordingly, the present invention supports fibers such as cotton yarn on a carrier and stores the fibers in a processing tank.
In a fiber package processing apparatus that introduces a processing solution such as a dye solution into a processing tank and performs package processing such as package dyeing on fibers, solves the conventional problems described above and prevents inconveniences such as uneven dyeing. It was made for the purpose of doing.

[0009]

According to the present invention, a vacuum generating device such as a vacuum pump is connected to the processing tank, and after the carrier is accommodated, the inside of the processing tank is evacuated by the vacuum generating device.

Further, according to the present invention, a circulation pump for circulating the processing liquid in the processing tank is arranged below the processing tank,
The suction end and the discharge end of the circulation pump are connected to the bottom end of the processing tank. Further, the vertical distance between the liquid level in the processing tank and the circulation pump is selected to be larger than at least the NPSH of the circulation pump by the pressure loss of the suction side pipe.

Further, according to the present invention, the heat exchanger for heating the processing liquid is provided between the processing tank and the discharge end of the circulation pump.

[0012]

Description of Embodiments Embodiments of the present invention will be described below.
FIG. 1 shows an embodiment of the present invention. This is a package dyeing device, which is intended for package dyeing of the cotton yarn 1, and has a processing tank 2, a carrier 3 and a feed pump 6. The processing tank 2 and the carrier 3 are the same as those in FIG. The feed pump 6 is similar to that of FIG. 2,
It is connected to the bottom end of the processing tank 2. Therefore, one cotton thread
Can be wound on a large number of cheeses, supported on a carrier 3, housed in the processing tank 2, and a dye solution can be fed by a feed pump 6 to introduce the dye solution into the processing tank 2.

Further, a vacuum generator is connected to the processing tank 2. In this embodiment, the vacuum pump 15 is used as the vacuum generator, and the vacuum pump 15 and the opening / closing valve 16 are used.
Are connected to the top end of the processing tank 2. Therefore, the inside of the processing tank 2 can be evacuated by the vacuum pump 15. On the contrary, in the conventional package dyeing apparatus, the compressor 13 is connected to the top end of the processing tank 2 and the compressed air is supplied into the processing tank 2 as described above.

Further, a circulation pump 8 is arranged below the processing tank 2, and the circulation pump 8 is the same as that of FIG.
The suction end 10 and the discharge end 11 are connected to the bottom end of the processing tank 2. Regarding the vertical distance H'between the liquid surface 12 of the processing tank 2 and the circulation pump 8, the liquid surface 12 is kept as low as possible as in the device of FIG. 2, but the circulation pump 8 is moved sufficiently downward. And the vertical distance H ′ is at least as high as the pressure loss α of the suction side pipe of NPSH of the circulation pump 8.
It has been selected to be large. This can be expressed by the following formula.

H '> NPSH + α

Further, this apparatus has a heat exchanger 9 for heating the dye solution in the processing tank 2. The structure is similar to that of the heat exchanger 9 of FIG. 2, but the heat exchanger 9 of this device is not located at a position communicating with the suction end 10 of the circulation pump 8 but between the processing tank 2 and the discharge end 11 of the circulation pump 8. It is provided in.

In this apparatus, when the cotton yarn 1 is subjected to package dyeing, the upper lid 4 is closed after the carrier 3 is accommodated. Then, first, the opening / closing valve 16 is opened, the vacuum pump 15 is driven, and the inside of the processing tank 2 is evacuated by the vacuum pump 15. This state is maintained for a certain period of time, whereby the internal air of the cotton yarn 1 is removed. After that, the on-off valve 5 is opened, the feed pump 6 is driven, and the feed pump 6 introduces the dye solution into the processing tank 2.

Further, the heat exchanger 9 operates, the on-off valve 5 is closed, and the circulation pump 8 is driven. Therefore, the dye liquid is sucked into the suction end 10 of the circulation pump 8 and the discharge end 1
1, the dye solution is heated by the heat exchanger 9, is sent to the bottom end of the processing tank 2, passes through the inside of the carrier 3, and is supplied to the cotton yarn 1 of the carrier 3. Further, the dye solution flows through the cotton yarn 1 of the carrier 3, flows to the bottom end of the processing tank 2, and circulates. Therefore, the dye solution comes into contact with and permeates the cotton yarn 1 of the carrier 3, and the cotton yarn 1 is package-dyed.

Therefore, in this apparatus, after the carrier 3 is accommodated, the inside of the processing tank 2 is evacuated by the vacuum pump 15, the internal air of the cotton yarn 1 is evacuated, and the dye liquid is supplied to the carrier 3.
No air is trapped in the cotton thread 1 when it comes into contact with and penetrates the cotton thread 1. Therefore, the dye solution can be uniformly contacted and permeated through the entire cotton yarn 1, and uneven dyeing of the cotton yarn 1 does not occur.

Further, when the inside of the processing tank 2 is evacuated, the boiling point of the dye solution is greatly reduced. Therefore, after heating the dye solution, the dye solution can be boiled in a short time. It is well known that the temperature of a boiled dye liquid is kept constant. Therefore, the temperature of the dye solution can be quickly made uniform, and uneven dyeing does not occur due to uneven temperature of the dye solution.

Further, in this apparatus, the liquid surface 1 of the processing tank 2 is
The vertical distance H'between 2 and the circulation pump 8 is selected to be larger than at least the NSPS of the circulation pump 8 by the pressure loss α of the suction side pipe, and the vacuum pump 15 causes the processing tank 2
Even if the inside is evacuated, the liquid pressure at the suction end 10 of the circulation pump 8 is high and its boiling point is also high. Moreover, what is heated in the heat exchanger 9 is not the dye liquid sucked into the suction end 10 of the circulation pump 8 but the dye liquid discharged from the discharge end 11. What is inhaled to the inhalation end 10 is the dye liquid which has come into contact with and penetrated the cotton thread 1 of the carrier 3, and its temperature is relatively low. Therefore, at the suction end 10 of the circulation pump 8, the temperature of the dye liquid does not exceed its boiling point, and cavitation does not occur. Therefore, the dye liquid can be accurately fed and circulated.

In this embodiment, the cotton yarn 1 is wound around a large number of cheeses and package dyeing is performed on the cheese. However, the cotton yarns are wound around a plurality of beams and supported on a carrier. The cotton yarn can be subjected to package dyeing. In another method, the cotton yarn may be package dyed. Even in any type of package dyeing, it is possible to prevent uneven dyeing of the cotton yarn. Not only the cotton thread 1 but also other fibers can be subjected to package dyeing, and uneven dyeing of the fibers can be prevented.

Further, the scouring liquid may be introduced into the processing tank 2 to subject the fibers to the package scouring, and the bleaching liquid may be introduced into the processing tank 2 to subject the fibers to the package bleaching. Also for package scouring or package bleaching, when the inside of the processing tank 2 is evacuated by the vacuum pump 15, when the scouring liquid or the bleaching liquid comes into contact with and permeates the fibers, air is not trapped in the fibers and the entire fibers are The scouring liquid or bleaching liquid can be contacted and penetrated uniformly, and no scouring or bleaching unevenness occurs. The scouring liquid or the bleaching liquid can be boiled in a short time and the temperature thereof can be quickly homogenized, and uneven scouring or bleaching unevenness does not occur due to uneven temperature of the scouring liquid or the bleaching liquid.

In the conventional package scouring or bleaching apparatus, when the scouring liquid or the bleaching liquid is permeated into the fibers and the fibers are subjected to the package scouring or the package bleaching,
It cannot penetrate the scouring or bleaching solution effectively. Therefore, it has been required to add a penetrant to the scouring liquid or the bleaching liquid. According to this invention, the scouring liquid and the bleaching liquid can be effectively permeated, and it is not necessary to add a penetrating agent. It is possible to reduce the chemicals in the scouring liquid or the bleaching liquid, and the running cost is low.

As the vacuum generator, an ejector is used instead of the vacuum pump 15, and the ejector is connected to the processing tank 2,
The inside of the processing tank 2 may be evacuated by an ejector. Another vacuum generator may be connected to the processing tank 2, and the inside of the processing tank 2 may be evacuated by the other vacuum generating apparatus.

[0026]

As described above, according to the present invention, after the carrier 3 is accommodated, the inside of the processing tank 2 is evacuated by the vacuum pump 15, and the processing liquid such as the dye liquid is converted into fibers such as the cotton yarn 1. No air is trapped in the fibers as they come into contact and penetrate. Therefore, the treatment liquid can be uniformly contacted and permeated through the entire fibers, and no inconvenience such as uneven dyeing occurs. After heating the treatment liquid, the treatment liquid can be boiled in a short time, and the temperature of the treatment liquid can be quickly made uniform, without causing inconvenience such as uneven dyeing due to the nonuniform temperature of the treatment liquid. It can achieve the purpose.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a conventional package dyeing device.

[Explanation of symbols]

 1 Cotton thread 2 Processing tank 3 Carrier 8 Circulation pump 9 Heat exchanger 10 Suction end 11 Discharge end 12 Liquid level 15 Vacuum pump

Claims (3)

[Claims] 1. A fiber such as cotton yarn is supported on a carrier, which is accommodated in a treatment tank, a treatment liquid such as a dye solution is introduced into the treatment tank, and the fibers are packaged for package dyeing or the like. In the apparatus configured to perform the treatment, a vacuum generator such as a vacuum pump is connected to the treatment tank, and after the carrier is accommodated, the inside of the treatment tank is evacuated by the vacuum generator. Fiber processing equipment. 2. A circulation pump that circulates the treatment liquid in the treatment tank is disposed below the treatment tank, the suction end and the discharge end of the circulation pump are connected to the bottom end of the treatment tank, and the treatment tank is also provided. 2. The apparatus according to claim 1, wherein the vertical distance between the liquid surface of the circulation pump and the circulation pump is selected to be larger than at least the NPSH of the circulation pump by the pressure loss of the suction side pipe. 3. The apparatus according to claim 2, wherein a heat exchanger that heats the processing liquid in the processing tank is provided between the processing tank and the discharge end of the circulation pump.