JPS6236879Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a liquid bath treatment apparatus for synthetic fiber tow. More specifically, the present invention relates to a liquid bath apparatus for drawing or heat treating synthetic fiber tow.

Prior Art Conventionally, when performing liquid bath stretching of synthetic fiber tow, or when performing heat treatment, oil treatment, etc. in a liquid bath, as shown in FIG. An apparatus is used in which the tow 1 is passed under the weirs 2, 2' and thus below the liquid level caused by the weirs 2, 2' to be treated in a liquid bath. However, as the processing speed is increased with the aim of improving productivity, the liquid 4 in the liquid bath device accompanies the traveling tow and is pushed to the tow exit side of the liquid bath device, causing the tow to enter the liquid bath device. The liquid level on the side becomes lower than the traveling position of tow 1. Therefore, the tow 1 is not sufficiently immersed in the liquid 4 on the tow entry side of the liquid bath apparatus, and the liquid bath treatment is insufficient, resulting in insufficient temperature rise, resulting in stretching or heat treatment unevenness, or heat treatment unevenness. There were drawbacks such as oil spots and other processing spots.

In addition, at high speeds, the liquid that collides with weir 2' scatters outside the liquid bath as shown by the dotted line in Figure 1, significantly impairing workability and safety, so liquid bath processing at speeds of 150 m/min or higher is extremely difficult. It was difficult and impractical.

In order to solve this problem, a device was proposed in which a liquid-stopping plate was provided above the tow to prevent the liquid from flowing along the tow (Japanese Utility Model Publication No. 15628/1983). However, in such a device, as shown in Fig. 2, as the speed increases, the liquid tends to stay on the weir plate 5, which causes the liquid temperature in front of the weir plate 5 to decrease, and the temperature at the top and bottom of the tow to be different. Therefore, it was found that processing spots were likely to occur. Also, as the speed increases, the liquid sticks to the weir plate surface, and the liquid bath between the weir plates 5 breaks down, and the tow 1 is not sufficiently immersed in the liquid bath, resulting in temperature unevenness on the tow. It was hot.

Purpose and structure of the invention The present invention was made against the background of the above circumstances, and its purpose is to prevent tow from running out of liquid even when tow is treated in a liquid bath at high speed, and to remove liquid from the liquid bath. An object of the present invention is to provide an apparatus capable of performing stable liquid bath processing without causing scattering of liquid, turbulence of liquid in the liquid bath, etc.

That is, the present invention is an apparatus for processing synthetic fiber tow by immersing it in a liquid bath with a weir on the inlet and outlet sides, and a device that is located close to the upper part of the running tow, approximately parallel to the running tow, and lower than the weir. It is characterized by having a perforated plate provided with a large number of holes.

The present invention will be explained below based on the drawings.

Embodiment FIGS. 3 and 4 are schematic explanatory diagrams and sectional views of essential parts showing embodiments of the present invention, and FIG. 5 is a line A-A in FIG. 4.
FIG. In the figure, reference numeral 10 denotes a (thermal) liquid bath according to the present invention, which is located between a set of supply rollers 39 and a stretching roller 40, and the tow 1 is stretched between them by a predetermined amount when passing through the liquid bath 10. will be carried out.

The liquid bath 10 has a tank main body 11 having a rectangular cross section, which has weirs 14 and 15 having slits 12 and 13 for the passage of the tow 1 at the front and rear ends, and a tank main body 11 having a rectangular cross section and front and rear receivers 16 connected to this. 17 are provided. 1
Numerals 8 and 19 are sealing members provided on the sides of the receivers 16 and 17 in the front and rear weirs 14 and 15 of the tank body 11, respectively, and include a sponge-like sealing material 20 and a frame 21 that holds it from above and below. It consists of 22,
Openings 23 and 24 for the tow to pass are formed at substantially the same horizontal plane positions as the slits 12 and 13, and the amount of liquid flowing out from the slits 12 and 13 is limited by creating a gap that allows the tow 1 to run in contact with the sealing material 20. It is made to be. It is also possible to change the liquid level in the tank body 11 by changing the size of the openings 23 and 24, and this sealing member 1
8, 19 is normally preferred, but is not required, and other types of sealing means may be utilized. A hot liquid supply chamber 25 is formed at the front end of the tank body 11 and projects downward.
Hot liquid is supplied from an inlet 26 provided at the bottom of the chamber.

Reference numerals 27 and 28 are lower perforated plates disposed horizontally at a position lower than the weirs 14 and 15 and close to the tow running path so as to narrow it;
It is attached to the bottom plate 11a of No. 1 via a spacer 29. Auxiliary weirs 30 and 31 are vertically provided at the front and rear of the upper perforated plate 27, and the auxiliary weir 30 at the front also serves to distinguish the upper part of the supply chamber 25. This auxiliary weir 30 prevents the supplied hot liquid from passing over the perforated plate 27 and bypassing it, increasing the effect of contact with the tow.
1 alleviates the impact on cough 15,
These can be omitted in some cases. The distance between the upper perforated plate 27 and the tow varies depending on the hole diameter, the amount of oil contained in the hot liquid (not necessarily including the oil), etc., but is usually 10 mm or less, and the distance between the tow and the lower perforated plate 28 Alternatively, it is preferable that the distance from the bottom plate 11a is similarly set to 20 mm or less in order to effectively reduce the size of the accompanying flow.

An arm 32 is installed at the top of one side of the auxiliary weirs 30 and 31.
is rotatably connected to the bracket 11b of the tank body 11 by a pin, and is arranged so as to be opened upward, so that it can be opened and closed as required. 33 is a handle for opening and closing. In addition, the perforated plate 27
It goes without saying that the opening and closing of the opening and closing is not limited to the above-mentioned method, and that any mechanism can be applied. Furthermore, the perforated plates 27 and 28 may be provided so as to be movable up and down independently so that the interval between them can be adjusted. Further, the lower perforated plate 28 can be omitted if the distance from the bottom of the tank body 11 can be made small. perforated plate 27,
The 28 holes 27a and 28a can have any shape and size, but usually circular holes with a diameter of about 2 to 10 mm are evenly arranged at equal pitches.

38 is a constant temperature heater provided below the liquid bath 10, which is connected to the inlet 26 of the supply chamber 25 through a pump 37 and a pipe 34, and is connected to the inlet 26 of the supply chamber 25 at the front and rear.
and are connected via pipes 35 and 36.

Effects In a device having such a configuration, tow 1
enters the tank body 11 from the opening 23 of the sealing member 18 through the slit 12, travels between the perforated plates 27 and 28 located in the hot liquid, and passes through the slit 13 and the opening 2.
In this way, a predetermined stretching is performed while passing through the (hot) liquid bath between the supply roller 39 and the stretching roller 40.

The liquid bath 10 has a constant temperature heater 38 provided below.
The temperature of the hot liquid is adjusted to a predetermined temperature, and the hot liquid is supplied to the supply chamber 25 of the liquid bath 10 through the upstream pipe 34 to the pump 37 . One part of the hot liquid injected into the supply tank 10 flows out through the sealing member 18, and the remaining part flows into the gap between the auxiliary weir 30 and the supply chamber 25, that is, the upper part.
It flows between the lower perforated plates 27 and 28. The supplied hot liquid flows out through the opening 24 of the seal member 19 at the rear of the tank body 11, and the supply amount is balanced with the amount of flow out from the front seal member 18, so that the liquid level in the tank body 11 is almost at a predetermined position. Retained. Receiver 16, 17
The hot liquid flowing out returns to the constant temperature heater 32 through the pipes 35 and 36, and the hot liquid in the liquid bath 10 is always maintained at a constant temperature by such circulation of the hot liquid.

When processing tow traveling in a normal liquid bath, as described above, as the traveling speed of the tow increases, the liquid bath that accompanies the tow (hereinafter referred to as accompanying flow)
As the amount of liquid increases and the velocity of the accompanying flow increases, problems arise such as the liquid running out at the inlet of the liquid bath, and the accompanying flow colliding with the weir at the outlet of the liquid bath and scattering. This tendency becomes particularly noticeable when the tow travel speed exceeds 150 m/min, and even arranging a plurality of weirs is not sufficient.

The present invention does not attempt to forcibly block the accompanying flow using such conventional weirs, but rather suppresses the growth of the accompanying flow itself.For this purpose, the perforated plate is placed close to the traveling tow as described above. It is placed. The accompanying flow to the running tow is generated at the entrance of the liquid bath 10 and grows while the tow freely runs in the tank, but the accompanying flow is formed because there is a perforated plate 27 along the position directly above the tow. The thickness of the boundary layer is regulated so that it does not grow beyond the thickness between the running tow 1 and the perforated plate 27, and therefore excessive growth of the accompanying flow is prevented, resulting in liquid shortage, liquid scattering, shock, vibration, etc. Things will go away.

In addition, in conventional liquid baths, the deeper the immersion depth of the tow, the larger the accompanying flow rate above the tow, but as is clear from the above explanation, when the perforated plate of the present invention is used by immersing it in a liquid bath, It has the advantage that the immersion depth of the tow can be set freely. Increasing the immersion depth of the tow increases the amount of liquid in the bathtub, and in the example of the hot liquid mentioned above, there are advantages such as a larger heat capacity and stable heat treatment, and the liquid communicates freely at the top of the perforated plate. Therefore, the pressure inside the liquid bath is equalized and the liquid level is stabilized.

Similarly, it has the advantage that the temperature within the liquid bath is also made uniform.

The same principle can be said about the perforated plate at the bottom of the running tow, but in the case of the lower part, as long as there is liquid at the top of the tow, the lower part will not run out of liquid, so it is different from the running tow. The lower perforated plate can be omitted if the growth of the accompanying flow is suppressed by reducing the distance from the bottom of the bathtub.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams showing conventional embodiments,
3 and 4 are a schematic explanatory diagram and a sectional view of a main part showing an embodiment of the present invention, and FIG. 5 is a sectional view taken along the line AA in FIG. 4. 10...liquid bath, 12,13...slit, 1
4,15...cough, 16,17...receiver, 27,
28... Perforated plate, 30, 31... Auxiliary weir, 32
……arm.

Claims (1)

[Scope of utility model registration request] In a device that processes synthetic fiber tow by immersing it in a liquid bath with a weir on the inlet and outlet sides, a large number of holes are provided near the top of the running tow, approximately parallel to the running tow, and at a position lower than the weir. A liquid bath treatment device for synthetic fiber tow, characterized in that a perforated plate is provided.