JP2689656B2 - Yarn heat treatment equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a yarn heat treatment apparatus, and in particular, a thermoplastic synthetic fiber such as polyester, nylon 6, nylon 66, etc. in which a plurality of yarns run in a strip shape. The present invention relates to improvement of a heat treatment apparatus of a type in which a heating fluid (for example, steam) is sprayed on a yarn for the purpose of drawing, heat setting, etc. in the yarn making process.

[Prior Art] A technique of utilizing steam for heating a yarn or the like has been known for a long time. Its greatest feature is that the object to be heated can be heated extremely rapidly by the condensation heat transfer effect of steam, and it has been used in the field of synthetic fiber spinning process from the past.
Many attempts have been made to use it as means for stretching, heat setting and the like.

On the other hand, the handling of steam has various problems as described below.

The first problem is that it is difficult to control pressure well. Since the properties of steam vary greatly depending on the pressure, it is necessary to control the pressure accurately. However, particularly in a device for processing a yarn by blowing steam having a pressure extremely close to the atmospheric pressure, even if it is possible to manage the pressure by using a manometer or the like, the pressure is actively controlled. There was no means, and people had to look around each weight regularly, and there was nothing left to do to check for abnormalities.

The second problem is related to steam drain.
When drainage occurs in the middle of piping or in the device, it is blown out from the steam outlet and is applied to the yarn, resulting in heat treatment unevenness and uneven quality of the yarn.

The third problem is that it is difficult to reduce the difference between the weights with respect to the processing pressure, the processing temperature, the heating fluid flow rate, and the like.

As mentioned above, the heat treatment performance of a heat treatment apparatus that uses steam is greatly affected by the pressure of the steam, the drain and impurities contained in the steam, and also the pressure loss of the heat treatment apparatus itself, heat dissipation loss, nozzle processing accuracy, etc. Is also affected by. Therefore, especially when the number of weights is increased, it is extremely difficult to eliminate the difference only by devising the manufacturing technique and the piping, and as a result, large quality unevenness occurs in the treated yarn of each weight. .

In order to solve the above problems, various improved devices have been conventionally devised, but even if it can solve some of the problems, it may be a technology that solves all the problems at once. There wasn't.

For example, in Japanese Utility Model Publication No. 51-28429, the circumference of the processing cylinder is surrounded by a heat medium sealing jacket, and the steam passage supplied by another pipe is passed through the jacket to superheat the steam for processing. A heat treatment apparatus that guides and blows out into a cylinder is disclosed. By doing so, even if a drain is generated in the middle of the pipe, it can be evaporated when passing through the jacket, so that there is an advantage that it can be prevented from being blown out as a drain into the processing cylinder.

[Problems to be Solved by the Invention] However, in the above-described conventional apparatus, the amount of drain that is about to be brought into the processing cylinder through the steam passage causes evaporation of the drain in the steam passage that passes through the jacket. Since the speed and the amount of evaporation are different, in the end,
There is a drawback in that the amount of steam sprayed on the yarn running in the processing cylinder, the temperature, etc. vary greatly, and the yarn cannot be uniformly processed. This problem not only exists when one weight is viewed over time, but also exists for multiple weights because the amount of drain that is being brought into each weight is different, so there is also variation between weights. To do.

In addition, there is a variation in the supply steam pressure between the weights due to pressure loss at the bent portion of the steam pipe, etc.
There was also a problem that scale, rust, etc. were accumulated in the middle of the steam piping over time and the variation in pressure loss increased, and the variation in supply steam pressure also increased accordingly.

An object of the present invention is to solve the above-mentioned problems in the prior art, and the heat treatment conditions such as pressure, temperature, and flow rate of the heating fluid sprayed on a plurality of yarns running in a band in the heat treatment cylinder are between the weights and the weights. An object of the present invention is to provide at low cost an apparatus that can perform stable heat treatment without fluctuations in the temperature.

[Means for Solving the Problem] A heat treatment apparatus for yarn according to the present invention, which meets this object, includes: (A) a heat treatment cylinder in which a plurality of yarns run in a strip shape; and (B) a heat treatment cylinder. A jacket provided around the jacket for heating and heat-retaining the heat treatment cylinder from the surroundings by a heating fluid supplied to the inside, and (C) communicating with the jacket to reduce the pressure of the heating fluid supplied into the jacket, and then the heat treatment cylinder Nozzle means for spraying a yarn running inside, (D) the nozzle means is located inside the jacket, is surrounded by the jacket, and is replaceably attached In the heat treatment apparatus of (E), the outlet of the heating fluid of the nozzle means is opposed to the strip-shaped arranging surface of the yarn, and is a slit extending in a direction crossing a plurality of strip-shaped yarns. Shaped opening Or consist of, wherein the same direction is a plurality of holes arranged at predetermined intervals.

[Operation] In such an apparatus, a heating fluid, for example, steam, which is supplied into the jacket for surrounding the heat treatment cylinder and heating the heat treatment cylinder from the surroundings to keep the heat in the heat treatment cylinder, It is also used as a heating fluid for directly heat treating yarns. The heating fluid supplied into the jacket is depressurized by the nozzle means and then sprayed onto the yarn.

Since the heating fluid is decompressed as it flows into the nozzle means from the inside of the jacket, most of the drain in the heating fluid flowing into the nozzle means is separated into the jacket by the resistance of the decompression section. Further, even if a small amount of drain flows into the nozzle means, it can be flushed by depressurization and substantially free of drain when sprayed on the yarn.

Further, since the nozzle means is positioned inside the jacket, the nozzle means can be kept warm and heated by the jacket, and the heating fluid such as steam can be prevented from being drained by the nozzle means.

Further, immediately after the start, even if the heating fluid such as steam brings in the drain while the heat treatment cylinder is not sufficiently warm, it can be evaporated in the nozzle means as the jacket temperature rises, and finally the drain from the heating fluid. Since it is possible to eliminate the yarn,
The heated fluid without drain can be stably supplied.

Further, in the nozzle means having a pressure reducing function, if the pressure of the heating fluid in the primary side, that is, the jacket, is uniquely determined, the secondary side, that is, the side of the heating fluid sprayed on the yarn, The pressure and flow rate are also determined. Therefore, the pressure and flow rate on the secondary side can be controlled extremely easily and accurately by controlling the pressure on the primary side, that is, the pressure of the heating fluid supplied to the jacket.

As a result, it is possible to spray a heated fluid that does not contain drain onto the running yarn at a desired pressure and flow rate, and the conditions can be easily adjusted. It can be made uniform.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

1 and 2 show a yarn heat treatment apparatus according to an embodiment of the present invention. In the figure, 1 is a heat treatment cylinder, and the inside of this heat treatment cylinder 1 is a heat treatment region 7 for heat treating the yarn Y. In the present embodiment, the yarn Y has shown a case where a plurality of yarns arranged in a band as shown in FIG. 2 travel, but a yarn that travels in a bundle may be used,
It may be a monofilament.

The shape of the heat treatment region 7 can be arbitrarily selected according to the yarn shape Y. In FIG. 2, the yarn Y traveling in a band shape has a rectangular cross-sectional shape, but may have an elliptical shape or the like. The point is that the shape of the steam outlet should be kept as equal as possible to the yarn so that the yarn can be uniformly treated, and the blown steam is heat-treated along with the yarn. It is preferable that the volume is such that the heat treatment region 7 can be filled with a suitable concentration by flowing through the region 7.

The heat treatment area 7 is surrounded by a heat insulation jacket 11, and the heat insulation jacket 11 is heated by steam supplied from the supply pipe 2. The discharge pipe 3 is connected to the bottom side of the heat insulation jacket 11, and the drain and the used steam are discharged from the discharge pipe 3.

As the steam supplied to the heat insulation jacket 11, a pressurized saturated steam pre-controlled by a pressure adjusting valve 21 provided on the primary side of the supply pipe 2 is used. Since the temperature of the steam is uniquely determined by the pressure, it can be appropriately selected according to the temperature condition required for the heat treatment area 7. A heat insulating material 10 is provided around the heat insulating jacket 11 to reduce heat loss. In addition, jacket
It is more effective to provide fins (not shown) on the inner wall of the jacket 11 in order to enhance the heating and heat retaining effect of 11 and the drain separating effect described later.

A cylindrical yarn processing steam blowing nozzle 4 is provided in a portion of the heat insulating jacket 11 near the heat treatment region 7. An orifice 5 is provided on one end side of the nozzle 4 by a screw 14 so as to be exchangeable. The inside of the nozzle 4 and the inside of the heat insulation jacket 11 communicate with each other through the orifice 5.

The nozzle 4 is detachably attached to the heat treatment cylinder 1 as shown in FIG.
It is fixed to. Nozzles 12 and 13 are sealing materials.
The steam is prevented from leaking from the outer peripheral surface part to the outside of the heat treatment cylinder 1.

The outer shape of the nozzle 4 does not necessarily have to be cylindrical as in this embodiment, and may be, for example, a block-like shape that is detachably attached to the inner wall surface of the heat treatment cylinder 1. However, if the nozzle 4 is formed into a cylindrical shape as in this embodiment, it can be easily attached to the heat treatment cylinder 1 simply by removing the plug 16 from the side surface, and is normally used to prevent leakage between the nozzle 4 and the heat treatment cylinder 1. O-rings and other sealing materials can be applied,
It has advantages such as low cost and high sealability.

On the outer peripheral surface of the nozzle 4, there is provided a blowout port 18 that opens to the pocket 6 communicating with the heat treatment area 7. The steam supplied to the jacket 11 is decompressed by the orifice 5 and blown as a yarn treatment steam from the blow-out port 18 to the heat treatment region 7 to heat the yarn Y. Reference numeral 15 is a porous material for rectifying the steam flowing from the orifice 5 before it is blown out to the heat treatment area 7. This porous material 15 is
In this embodiment, the shape of the nozzle 4 is cylindrical according to the shape of the nozzle 4, but a plate-shaped porous material may be used. In particular, when the yarn Y travels in a strip shape as shown in FIG. 2, it is desirable to provide such a straightening portion in order to make the flow velocity distribution of the steam blown on the yarn Y more uniform.

Regarding the orifice 5, the nozzle 4 is provided with a plurality of orifices having the same orifice diameter or different orifice diameters, and the pressure and flow rate conditions of the blowing steam can be widely selected by selecting the number and diameter of the orifices. It is also possible. The hole diameter of the orifice 5 (orifice diameter) is preferably 0.5 mm or more and 2.5 mm or less, and more preferably 1 mm or more and 2.0 mm or less so that the influence of impurities in the steam and the accumulation of scale is small.

By the way, Fig. 3 shows the steam pressure (secondary pressure) after passing through the orifice when the hole diameter and number of orifices 5 are changed with respect to the steam pressure (primary pressure) in jacket 11.
It shows the result of examining. The measuring points and measuring devices are as shown in Table 1. Thus, if the relationship between the hole diameter and the number of orifices and the primary and secondary pressures of steam is obtained in advance, the desired steam pressure in the heat treatment region 7 in the heat treatment cylinder 1, that is, the secondary pressure, From FIG. 3, the primary pressure to be supplied to the heat treatment apparatus is also uniquely determined.

In the case of the present embodiment, the shape of the blow-out port 18 is such that a plurality of yarns arranged opposite to the strip-shaped arrangement surface of the yarn Y and arranged in strips are formed as shown in FIG. 1 and FIG. Although the slits extend in the direction crossing, the plurality of yarns arranged in the form of strips in the longitudinal direction of the cylinder at intervals of 1 to 10 mm, that is, facing the strip-shaped arrangement surface of the yarn Y. The holes having an inner diameter of about 1 to 6 mm may be arranged in a direction traversing.

Further, the opening area of the blowout port 18 may be uniform in the longitudinal direction of the nozzle 4, and the blowout should have a certain distribution in the longitudinal direction of the nozzle 4 depending on the filling degree of steam in the heat treatment area 7. Thereby, the filling degree of steam in the processing area 7 can be made uniform.

The outlet 18 needs to have a shape with low pressure loss. Therefore, it is necessary to make the cross-sectional area at least larger than that of the orifice 5, and it is preferable to make the cross-sectional area 5 times or more.

Guide plates 8 and 8'for preventing airflow associated with the yarn Y and keeping the yarn path of the yarn Y stable are attached and detached above and below the heat treatment cylinder 1 so as to sandwich the yarn Y, respectively. It is freely attached by means of screws (not shown) or the like. further,
Boxes 9 and 9'are detachably attached by means such as screws (not shown). The boxes 9 and 9'are connected to a suction source (not shown) by suction pipes 17 and 17 'so that steam and drain leaked from the heat treatment area 7 can be collected. Reference numeral 19 is a water column manometer thin tube for detecting the outlet pressure of the orifice 5, and 20 is a seal plug of this thin tube.

1 and 2, the nozzle 4 is provided with one nozzle on one side of the yarn Y, but a plurality of nozzles may be provided on one side along the traveling direction of the yarn Y. It is good, and it may be provided at a plurality of positions on both sides of the yarn Y.

Further, in the embodiment shown in FIG. 1, the case where the yarn Y travels from the upper side to the lower side is shown, but as shown in FIG.
The yarn Y may run from bottom to top. However, in that case, the nozzle 4 is preferably provided on the lower side of the heat treatment cylinder 31 in order to spray the steam from the upstream side of the yarn Y. Regarding the structure of the jacket 32 and other parts,
According to the device shown in the figure.

Further, in the embodiment shown in FIGS. 1 and 4, the steam outlet angle α with respect to the yarn Y (angle with respect to the line orthogonal to the yarn Y) is usually preferably in the range of −60 degrees to +60 degrees. , -30 degrees to +30 degrees is more preferable.
When the angle α is within the above range, not only the efficiency of the steam with respect to the yarn Y is increased, but also the accompanying flow of the yarn Y is not interrupted and disturbed, so that uniform heat treatment can be performed.

Further, within the range of the angle α, the steam outlet 6 of the nozzle 4 may be opened only in one direction,
You may open in multiple directions at the same time.

Furthermore, in FIG. 2, the heat treatment region 7 is formed by the heat treatment cylinder 1 having a rectangular cross-sectional shape, but it is shown in FIG. 5 in order to facilitate the threading operation into the heat treatment region 7. It can also be configured as usual.

That is, in FIG. 5, reference numeral 41 is a heat treatment cylinder having an opening extending in the cylinder longitudinal direction, and a lid member 43 having a rubber packing 42 abuttable on the opening is heat-insulated via a hinge 44. After the material is attached to the material 45 and the thread has been passed through, the lid 43 is closed, and the packing 42 is pressed against the opening of the heat treatment cylinder 41 by the snap lock 46 to form the heat treatment region 47. Heat treatment cylinder
If the 41 is configured to have such an opening along the entire length along the yarn path, it is possible to continuously thread the yarn while pulling the yarn running at high speed with a suction means such as a suction gun. The property can be significantly improved.

In the heat treatment apparatus configured as described above, the steam supplied from the supply pipe 2 is pressurized steam whose pressure is controlled by the pressure control valve 21 provided on the primary side of the supply pipe, and the jacket 11 is heated and kept warm. It is for doing.
Although it varies depending on the condition of the heat treatment area 7 and the type of the yarn Y, it is usually controlled within the range of 0.5 to ⁵ kg / cm ² G.

The jacket 11 serves as a drain separator for the supplied steam. That is, even if the drain, iron rust, dust, etc. generated in the middle of the piping are mixed in the steam supplied from the supply pipe 2 and brought in, they collide with the inner wall surface of the jacket 11 on the heat treatment cylinder 1 side, The light steam forms the flow as it is and fills the interior of the jacket 11,
While the inside of 11 is heated, heavy drain, rust, dust, etc. collide and fall, and become drain and is discharged from the discharge pipe 3.

Further, the steam supplied to the jacket 11 once suddenly diffuses in the jacket 11 and a part of the steam flows into the nozzle 4 through the throttle portion having a pressure loss due to the orifice 5, so that drain, rust, dust, etc. It is separated from the steam flow without following this rapid diffusion and constriction. Due to this action, the jacket 11 also has the function of the drain separator.

In the apparatus of the present invention, a part of the steam supplied into the jacket 11 is also appropriately depressurized and used for the heat treatment for spraying the yarn Y. Therefore, the pressure of the steam blown to the heat treatment region 7 and the jacket There is a great feature that the pressure of 11 steams can be controlled by a common pressure regulating valve 21.

Especially when you want to blow a small pressure steam close to the atmospheric pressure to the heat treatment area 7, you can select the hole diameter of the orifice 5 according to the required pressure and replace it with the optimum orifice. By simply controlling the pressure, the desired pressure as the pressure in the heat treatment area 7 is automatically obtained. Moreover, since the steam that has been drain-separated in advance by the jacket 11 can be used as the steam for yarn processing, it is possible to obtain a uniform steam that does not contain drain, and to reduce fluctuations in pressure, temperature, flow rate, etc. when drain exists. It is possible to keep it extremely small.

Further, in the apparatus of this embodiment, since the orifice 5 is integrally assembled with the nozzle 4 and is exchangeable, even if there are various individual differences among the weights, the optimum orifice for each weight is provided. Can be easily set, and by adjusting for each cone, processing with a small difference between the spindles can be performed.

In addition, even if scale or rust generated in the middle of the pipe reaches the orifice as it is and the hole is clogged with time, the orifice can be easily replaced, so that the operation can be restarted within a short time. There is.

Further, in the apparatus of this embodiment, since the nozzle 4 is provided substantially inside the jacket 11 and the nozzle 4 is kept warm and heated by the jacket 11, the steam rectified in the nozzle portion is prevented from being drained. Can be prevented.

Furthermore, immediately after the start, even if the drain carried by the steam is mixed into the nozzle portion while the heat treatment cylinder 1 is not sufficiently warm, as the jacket 11 is heated, it is evaporated in the nozzle 4 and finally blown out. Since the drain can be eliminated from the steam, the steam without drain can always be stably supplied to the yarn Y passing through the heat treatment area 7.

As the heating fluid used in the device of the present invention, heating air or the like can be used in addition to steam, and the present invention can be applied to a pressurized fluid treatment that requires a desired pressure or temperature with the heating air or the like. It goes without saying that it can be applied.

[Effects of the Invention] As described in detail above, in the case of the yarn heat treatment apparatus of the present invention, a part of the heating fluid supplied to the jacket is applied to the plurality of yarns traveling in a strip shape in the heat treatment cylinder. Is reduced by nozzle means to face the strip-shaped arranging surface of the yarns, and a plurality of holes, such as slits or holes provided at predetermined intervals, extending in the direction crossing the plurality of yarns arranged in a strip shape. Since the jetting is performed from the outlet, the heating fluid whose pressure, temperature, flow rate, etc. are uniquely determined can be jetted simultaneously to all of the plurality of running yarns. Therefore, the plurality of running yarns can be stably heat-treated between the weights and within the weights without fluctuation.

Further, the heat treatment conditions such as the above pressure, temperature, and flow rate can be easily controlled by attaching and detaching the nozzle means that matches these conditions to the heat treatment apparatus, and the jacket portion can function as a drain separator, so that the blowing steam can be used. Since the drain can be removed almost completely, and the drain can be removed more completely by keeping the nozzle means inside the jacket and using the heat retention and heating action of the jacket, a stable and uniform heat treatment of the yarn is required. You can

Therefore, by controlling the pressure, temperature, flow rate, etc. of the yarn spraying steam that does not contain drain, the target yarn heat treatment can be performed while minimizing the dispersion within and between the weights. In addition, the device of the present invention can be implemented at low cost.

[Brief description of the drawings]

1 is a longitudinal sectional view of a yarn heat treatment apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged transverse sectional view taken along the line II-II of FIG. 1, and FIG. 3 is an apparatus of FIG. Fig. 4 is a longitudinal sectional view of a yarn heat treatment apparatus according to a modified example of the apparatus of Fig. 1, and Fig. 5 is an apparatus of Fig. 1 FIG. 11 is a transverse cross-sectional view of a yarn heat treatment device according to another modification example of FIG. 1, 31, 41 ...... Heat treatment cylinder 2 ...... Steam supply pipe 3 ...... Discharge pipe 4 ...... Nozzle 5 ...... Orifice 6 ...... Pockets 7, 47 ...... Heat treatment area 8, 8 '...... Guide plate 9, 9 '... Box 10, 45 ...... Insulation material 11, 32 ...... Jacket 15 ...... Porous material 17, 17' …… Suction tube 18 ...... Outlet port 21 ...... Pressure adjustment valve 42 ...... Packing 43 ...... Lid Y ... Thread

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-53-65447 (JP, A) JP-B 1-53365 (JP, B2) JP-B 51-28429 (JP, Y2)

Claims (2)

(57) [Claims] 1. A heat treatment cylinder in which a plurality of yarns run in a strip shape in the cylinder, and (B) a heat treatment cylinder which is provided around the heat treatment cylinder and which is supplied to the inside of the heat treatment cylinder from the surroundings. A jacket for heating and keeping heat; and (C) a nozzle means that communicates with the jacket and depressurizes the heating fluid supplied into the jacket and then sprays the yarn running on the inside of the heat treatment cylinder In the yarn heat treatment apparatus, wherein the nozzle means is located in the jacket, surrounded by the jacket, and replaceably attached, (E) the outlet of the heating fluid of the nozzle means Is a slit-shaped opening facing the strip-shaped arrangement surface of the yarn and extending in a direction crossing the plurality of yarns arranged in a strip, or a plurality of holes arranged at a predetermined interval in the same direction. Specially Heat treatment device for the yarn to be collected. 2. The yarn heat treatment apparatus according to claim 1, wherein said nozzle means is provided with an orifice for decompressing said heating fluid.