JPH0340861A - Method for preventing dryness of sizing agent-squeezing roller - Google Patents

Abstract

PURPOSE:To suitably and readily give moisture to sizing agent-squeezing rollers in response to the driving or stopping operation thereof by disposing a hot water vessel below the sizing agent-squeezing rollers and generating steam from the hot water vessel by a specific method only when the rotation of the rollers are stopped. CONSTITUTION:An upper surface-opening type hot water vessel 20 is disposed below a pair of sizing agent-squeezing rollers 8 and 9 deposed vertically and also a hot water tank 21 for supplying hot water into the hot water vessel 20 is disposed at a prescribed position. When the rotation of the sizing agent- squeezing rollers 8 and 9 are stopped, the hot water supplied from the hot water tank 21 is stored in the hot water vessel 20 to generate steam. When the rotation of the sizing agent-squeezing rollers 8 and 9 are begun, the hot water from the hot water vessel 20 is returned into the hot water tank 21 to evacuate the hot water vessel 20, whereby only when the rotation of the sizing agent-squeezing rollers 8 and 9 are stopped, steam is attached to the surfaces of the sizing agent-squeezing rollers 8 and 9 to generate dew thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for preventing drying of a sizing reroller used when sizing warp threads.

[Conventional technology]

Sizing (usually referred to as "sizing") to the warp yarns is generally performed using a device as shown in FIG. In the figure, 1 is a sizing agent supply tank that stores liquid sizing agent, 2 is an immersion roller that introduces yarn into the tank 1 and applies sizing, and 3
．． Reference numeral 4 denotes a pair of glue squeezing rollers that squeeze the thread 10 from above and below after passing through the iso-jean row 92 to squeeze out excess glue. Of these three rollers 2, 3.4, the isolation roller 2 and the lower glue squeezing roller 4 are partially immersed in the glue layer in the glue supply tank 1. During operation, the glue constantly adheres to the roller surface and keeps it wet. Further, the upper glue squeezing roller 3 is also in a wet state as it has absorbed some of the glue adhering to the yarn 10 passing through the opposing lower glue squeezing reroller 4. The yarn 10 that has passed between the glue squeezing rollers 3 and 4 is transferred to a drying section (not shown). In such a gluing process, the operation of the apparatus may be temporarily stopped during the work to handle thread breakage or the like. During this stop, water evaporates from the surfaces of the two glue squeezing rollers 3 and 4, the glue dries, and the glue hardens at the pinching part (the part indicated by P in the figure), so that the thread 10 It may stick to the glue squeezing rollers 3 and 4. If the operation is resumed from this state, the yarn 10 will be forcibly peeled off from the roller surface, and the yarn 10 will likely become fluffy. In addition, in some cases, the thread 10 may be attached to the glue squeezing roller 3
Otherwise, the thread 10 moves while being stuck to the glue squeezing roller 3 or 4, causing thread breakage.

Additionally, the present applicant has developed a simple gluing method using a device as shown in FIG. 8 as a new method different from the conventional gluing method and has already filed an application (Japanese Patent Application No. 63-1777).
45, filed on July 15, 1988). This device uses thread 1
0 into the sizing agent supply tank 1, the sizing roller 6.
After applying the sizing agent by contacting the upper part of the sizing agent 7, gluing can be performed by passing a pair of sizing rollers 8.9 provided outside the sizing agent supply tank 1. According to this method, the required minimum size agent can be uniformly attached to the yarn 10, and warp yarns with excellent weavability can be obtained. However, on the other hand, since the glue squeezing rollers 8 and 9 are provided outside the glue supply tank 1 rather than inside the glue supply tank 1, the glue squeezed from the yarn 10 tends to dry on the roller surface. Therefore, sticking of the thread 10 when the device is restarted becomes a problem more than in the conventional device.

Therefore, prior to the present invention, the present applicant had developed and filed a patent application for a method of passing a refrigerant through at least one of the glue squeezing rollers to cause dew condensation on the roller surface to prevent it from drying out. 177746, filed on July 15, 1988). Then, as a method of causing dew condensation on the surface of the glue squeezing roller without using a refrigerant, a hot water storage tank is installed below the glue squeezing roller, and water vapor (steam) rises from this hot water storage tank and condenses on the surface of the glue squeezing roller. We have developed a method to do this, and have already filed an application for this (patent application 1986-26).
0319, filed on October 15, 1988).

(Problems to be solved by the invention) However, all of these methods require the operation of the device,
Regardless of whether the machine is stopped or not, dew condensation always occurs on the surface of the glue squeezing roller, so the area that was dampened by condensation when the machine was stopped will continue to receive excess moisture even after restarting, causing the moisture content of this area to decrease. It gets expensive. Therefore, the drying conditions after squeezing the glue must be strict, and the threads may suffer thermal damage, so it was thought that there was room for improvement. Furthermore, the amount of dew condensation formed on the surface of the glue reroller fluctuates due to changes in the temperature of the refrigerant or hot water, which also causes a problem in that the uniform adhesion of the glue is also hindered.

This invention was made in view of the above circumstances, and provides a method for preventing drying of the glue squeezing roller, which moistens the surface of the glue squeezing roller only when the device is stopped, and does not moisten the surface of the glue squeezing roller when the device is in operation. is its purpose.

[Means for solving problems]

In order to achieve the above object, the method for preventing glue squeezing rollers from drying out according to the present invention includes providing an open-top hot water tank below a pair of glue squeezing rollers arranged vertically, and placing the hot water tank at a predetermined position. A hot water tank 1 for supplying hot water is provided in the hot water tank, and when the rotation of the glue squeezing roller stops, hot water is supplied from the hot water tank to the hot water tank, the hot water is stored in the hot water tank, and water vapor is generated from the surface of the hot water. By returning hot water from the hot water tank to the hot water tank when the glue squeezing roller starts rotating, and emptying the hot water tank, water vapor adheres to the glue squeezing roller surface and condensation occurs only when the glue squeezing roller stops rotating. The configuration is such that this occurs.

[Effect]

In other words, as a result of a series of studies on how to prevent the glue squeezing roller from drying out, the inventors of the present invention have found that in order to moisten the entire glue squeezing roller, dew condensation is created on the surface of the glue squeezing roller as in the invention of the previous application. We have obtained confirmation that this is the most preferable option. As a result of further research on a method to moisten the glue squeezing roller through condensation, and to make the condensation only occur when the glue squeezing roller is stopped, we found that a hot water tank was installed under the glue squeezing roller. In this hot water tank,
By introducing hot water to create steam when the glue squeezing roller is stopped and emptying it when the glue squeezing roller starts operating, steam will not be generated intermittently as the glue squeezing roller starts and stops. This invention was achieved by discovering that it is possible to

Next, the present invention will be explained in detail based on examples.

〔Example〕

FIG. 1 shows an example of a glue squeezing device used in the present invention. That is, this device is provided with an open-top hot water tank 20 below the glue squeezing rollers 8 and 9, and a hot water tank 21 below the hot water tank 20. Hot water is always stored in the hot water tank 21, and a part of it is stored at the pump 2.
2 into the hot water tank 20. There are two channels in the flow path that connect the pump 22 and the hot water tank 20.
There are two types, 3.24, and one of the flow paths can be selected by switching electromagnetic valves A and B provided in each flow path. The flow path 23 is provided with an on-off valve 25 that is set to a fully open state.
When this is selected, an amount of hot water equivalent to the discharge amount of the pump 22 is introduced into the hot water tank 20 at once. Also,
The flow path 24 is provided with an on-off valve 26 that is set to a slightly open state, and when this flow path 24 is selected, hot water is introduced into the hot water tank 20 little by little.

On the other hand, the hot water tank 21 below from the center of the bottom of the hot water tank 20
A drainage channel 2 opened and closed by a solenoid valve C toward the inside.
7 is extended. When this solenoid valve C is opened, the hot water in the hot water tank 20 falls all at once into the hot water tank 21.
The inside becomes empty. Furthermore, an overflow channel is formed between the hot water tank 20 and the hot water tank 21 in order to keep the water level of the hot water tank 20 constant.

In this way, the hot water circulates between the hot water tank 20 and the hot water tank 210, but the temperature of the hot water is controlled in the hot water tank 21. That is, the hot water tank 21 is connected to a steam introduction path 29 provided with a control valve whose opening degree is automatically determined by a temperature controller 30, and steam is supplied until a predetermined set temperature is reached. Hot water is heated. In addition, 31 is the temperature controller 3 mentioned above.
This is a temperature sensor that informs 0 of the actual hot water temperature data. Further, the water level in the hot water tank 21 is kept constant by supplying water from a supply waterway 32 using a pole tap 33.

In addition, in the above-mentioned apparatus, the pump 22. The solenoid valves A, B, and C are controlled to open and close according to the time chart shown in FIG. Therefore, according to this device, when the sizing device is in operation,
The hot water tank 20 is empty (see the water level of hot water in the hot water tank 20 shown below the time chart in Figure 2), the pump 22 is activated at the same time as the sizing device is stopped, and then the solenoid valve A is opened. Hot water is introduced into the hot water tank 20 from the hot water tank 21 all at once. When a certain amount of hot water has accumulated, solenoid valve A closes and at the same time solenoid valve B opens.
The amount of hot water introduced into the hot water tank 20 is narrowed down to a very small amount. By introducing this small amount of hot water, a constant water level is maintained even if the amount of hot water in the hot water tank 20 decreases due to evaporation. Then, when the operation of the sizing device resumes, solenoid valve B closes and at the same time solenoid valve C opens, and the hot water from the hot water tank 20 drops into the hot water tank 21 all at once, making the hot water tank 20 empty. Pump 22 then stops. In this manner, hot water is introduced into the hot water tank 20 only when the sizing device is stopped, and water vapor rises toward the glue squeezing roller 8.9, making it possible to moisten the surface by condensation.

Therefore, using this device, it is possible to perform glue squeezing while preventing the glue squeezing crawlers 8.9 from drying out, for example, as follows. That is, first, water is put into the hot water tank 21 and the temperature controller 31 is set at 70 to 80°C to heat the water.

Then, as described above, this hot water is introduced into the hot water tank 20 only when the sizing device is stopped, and water vapor is removed from the hot water tank 20 by the glue squeezing roller 8. The area around the glue squeezing rerollers 8 and 9 is kept in a high humidity state (humidity 85 to 95%).
degree). At this time, the surfaces of the glue squeezing rollers 8 and 9 are at room temperature (approximately 18 to 30°C), so when the water vapor reaches the surface of the glue squeezing rollers 8 and 9, it is rapidly cooled due to the temperature difference and condensation occurs. . Therefore, the entire outer surface of the glue squeezing crawler 8.9 becomes wet with water droplets, and the surfaces of the glue squeezing rerollers 8, 9 do not dry. Therefore, the thread 10 that has stopped due to being pinched by the glue squeezing roller 8.9 does not stick to the glue squeezing roller 8.9, and when the device restarts next time, the thread IO moves smoothly. Therefore, there is no damage such as fuzz on the yarn 10. Moreover, while the sizing device is in operation, the hot water tank 20 is emptied as described above and the generation of water vapor is stopped, so the glue squeezing roller 8.
There is no dew condensation on the surface of No. 9, and there is no possibility that the glue will adhere unevenly or drying will be poor due to excessive moisture.

Note that when gluing is performed continuously for a long time, the glue squeezing roller 8. The atmosphere near 9 becomes hotter. In this case, the temperature difference between the hot water tank 20 and the surfaces of the glue squeezing rollers 8 and 9 becomes smaller, so that the amount of dew condensation becomes smaller. Therefore, in such a case, the set temperature of the temperature controller 30 is increased to warm the hot water and the amount of water vapor rising from the hot water tank 20 is increased to maintain the amount of dew condensation at an appropriate amount.

In the above embodiment, the upper surface of the glue squeezing roller 8 is exposed, and since the water vapor generated when the sizing device is stopped mainly moves along the side surface of the glue squeezing roller 8.9 as shown by the arrow, the roller surface is exposed. There is a tendency for the amount of dew condensation to be large in the shaded area in the figure, and the amount of dew condensation to be small on the upper surface of the upper glue squeezing roller 8. Even if the top surface of the glue squeezing roller 8 dries, there is no problem as it will not affect the gluing as long as the other parts are sufficiently moist. A cover 40 is placed above the glue squeezing rollers 8 and 9 so as to cover the top surface of the glue squeezing reroller 8.
It is preferable to attach

In this way, since the surroundings of the glue squeezing rollers 8 and 9 are covered by the cover 40 and the lower hot water tank 20, the glue squeezing rollers 8 and 9 atmosphere (the cover 40 and the lower hot water tank 20
By controlling the temperature of the hot water introduced into the hot water tank 20, it is easy to keep the temperature and humidity of the space (space surrounded by the hot water tank 20) constant. This makes it possible to keep the temperature of the hot water in the hot water tank 20 at an appropriate level and generate an appropriate amount of frost on the surfaces of the glue squeezing rollers 8 and 9. The cover 40 is
For example, it can be obtained by bending a sheet metal material downward into a U-shape to form a bottom shape, and then folding down the left and right edges 41 inward, respectively. Note that the left and right edges 41 are marked as shown in Fig. 4 (
As shown in the xx' arrow view of FIG. 3), the slope is such that the central portion along the longitudinal direction is the highest position and gradually becomes lower toward both ends. When such a cover 40 is attached, the water vapor rising from the hot water tank 20 below will stay evenly around the glue squeezing rollers 8 and 9, and will be uniform over the entire roller surface including the top surface of the glue squeezing roller 8. Condensation can be obtained. Incidentally, excess water vapor condenses inside the cover 40, passes along the folded portions of the left and right edges 41, and is discharged from both ends.

That is, the left and right edges 41 of the cover 40 serve as troughs.

A method of passing a refrigerant through at least one of the glue squeezing rollers 8 and 9 to cause dew condensation on the roller surface to prevent it from drying out (Japanese Patent Application No. 63-177746, July 15, 1988)
When the method of the present invention is combined with the method of the present invention, it is possible to effectively generate a uniform and appropriate amount of dew condensation. However, even when using the above refrigerant, the glue squeezing crawler 8.
It is desirable that the roller be cooled only when the rotation of the roller 9 is stopped. Therefore, as shown in FIG. 5, for example, a refrigerant introduction path 45 is provided for introducing refrigerant into each of the glue squeezing rollers 8 and 9, and a solenoid valve E is provided in the middle of the refrigerant introduction path 45 to adjust the sizing device to ON/OFF. It is preferable that the electromagnetic valve E is opened and closed. As a result, only when the rotation of the glue squeezing rollers 8 and 9 is stopped, water vapor can rise from the hot water tank 20 and at the same time, the refrigerant can be introduced into the glue squeezing rollers 8 and 9. can effectively eliminate dew condensation. The opening and closing operations of the electromagnetic valve E follow the time chart shown in FIG. The configuration of other parts is the same as that of FIG. 1, and the explanation thereof will be omitted.

Next, polyester multifilament yarn (50'/
24'), using the apparatus shown in FIG. 1 and the apparatus shown in FIG. 3, actual gluing was performed while causing dew condensation only when the apparatus was stopped (no refrigerant was passed through). In addition, as a control example, gluing was carried out using the apparatus shown in FIG. 3 by constantly introducing hot water into the hot water tank 20 and causing dew condensation. The processing conditions for each of the above gluing processes are common and are as follows.

Number of warping yarns: 1062 Warping yarn speed: 200 m/min Sizing agent used Sizing agent: Oil agent = 80:20 Sizing temperature
40''C drying equipment 100'C, 4m chamber base Each device was operated for 8 hours and the results of a comparative study are summarized in the table below.

(Margin) [Effects of the Invention] As described above, according to the present invention, by simply making improvements to the conventional gluing device, the entire surface of the gluing roller can be easily moistened by condensation. It is possible to prevent drying when the gluing device is stopped.

Therefore, troubles such as threads sticking to the rollers do not occur when the gluing device is restarted, and the gluing process can proceed smoothly.1. No undue stress is placed on the yarn when restarting, and the quality of the fabric obtained by weaving is also good. Moreover, according to the present invention, the above-mentioned dew condensation can be caused intermittently according to the operation and stoppage of the glue squeezing reroller, so that the glue may not adhere unevenly or drying performance may deteriorate due to excessive water content. I don't have to worry about it.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an embodiment of the gluing device used in the present invention, Fig. 2 is a time chart showing its operating state,
Figure 3 is a configuration diagram showing a modification, and Figure 4 is the x of Figure 3.
-X' arrow view, FIG. 5 is a partial configuration diagram showing another embodiment of the gluing device used in the present invention, and FIG. 6 shows the operating state of the solenoid valve E used in the above other embodiment. A time chart diagram, FIG. 7 is a configuration diagram showing a conventional gluing device, and FIG. 8 is a configuration diagram showing the configuration of a gluing device prior to this invention.

Claims (5)

[Claims] (1) A hot water tank with an open top is provided below a pair of glue squeezing rollers arranged vertically, and a hot water tank for supplying hot water into the hot water tank is provided at a predetermined position. When the glue squeezing roller stops rotating, hot water is supplied from the hot water tank into the hot water tank, the hot water is stored in the hot water tank, and steam is generated from the hot water surface, and when the glue squeezing roller starts rotating, hot water is supplied from the hot water tank. A method for preventing drying of a glue squeezing roller, characterized in that water vapor is attached to the surface of the glue squeezing roller and dew condensation occurs only when the rotation of the glue squeezing roller is stopped by emptying the inside of the hot water tank by returning the glue squeezing roller to the tank. (2) The glue according to claim (1), wherein the temperature of the hot water circulating between the hot water tank and the hot water tank is controlled in the hot water tank to adjust the amount of water vapor adhering to the surface of the glue squeezing roller. How to prevent squeezing roller drying. (3) Claim (1) or (2) wherein a cover is provided above the set of glue squeezing rollers to completely cover the top surface of the glue squeezing rollers so that an appropriate amount of dew condensation occurs on the entire surface of the glue squeezing rollers. The described method for preventing glue squeezing rollers from drying out. (4) The glue squeezing roller drying according to any one of claims (1) to (3), wherein a refrigerant is introduced into at least one roller of the set of glue squeezing rollers to cool the roller. How to prevent it. (5) The method for preventing glue squeezing rollers from drying according to claim 4, wherein the coolant is introduced only when the set of glue squeezing rollers stops rotating, and the rollers are cooled only when the glue squeezing rollers stop rotating.