JPH0589473U - Heat treated cylinder of synthetic fiber - Google Patents

Abstract

(57) [Summary] [Purpose] We propose a heat-treated tube that can reliably thread synthetic fiber yarns in a short time even at high temperatures. [Structure] A coating 3 coated with ethylene tetrafluoride resin is formed on an inner peripheral surface of a main body 2 of a heat treatment cylinder arranged below a spinneret 6, and a yarn y is drawn at a cylinder exit by a suction device 7. Even when pulled out, the spun yarn can be threaded easily and easily without fusion to the wall surface. There is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a non-contact heating cylinder arranged below a spinneret in a synthetic fiber manufacturing process, and more particularly to a heating cylinder capable of easily threading a spun yarn discharged.

[0002]

[Prior Art]

 In the process for producing synthetic fibers such as polyester and polyamide, a so-called direct-drawing process, which is a direct spinning-drawing process in which a spinning process and a drawing process are continuous, is becoming mainstream for the purpose of improving productivity in recent years.

Conventionally, in this direct rolling process, a method of preheating, stretching, and heat setting with a heating roller after applying an oil agent to a spun yarn is generally used, but for the past several years, the purpose has been to further improve productivity. A heat treatment cylinder is installed below the spinneret without using a heating roller, and the direct drawing process of drawing and heat setting is actively conducted by utilizing the spinning tension generated between the spinneret and the oil agent applying device. I started to be seen.

In such a heat treatment method, first, it is required that the yarn can be uniformly heat-treated in the heat treatment cylinder, and at the same time, the yarn can be efficiently passed through the heat treatment cylinder at the start in response to the speedup. Required to increase productivity.

Conventionally, various methods for threading the heat-treated tube have been proposed. For example, as shown in Japanese Examined Patent Publication No. 63-44854, a blowing gun is attached to the thread-introducing side to cool the blow-in gun. A method has been proposed in which threading is performed with the wind.

However, this method has a problem in that the operation is complicated, such as fixing a blower gun to the upper part, and it takes some time to equalize the temperature to a predetermined temperature because the heat treatment cylinder itself is cooled.

As still another method, a suction gun having a pipe longer than the entire length of the heat treatment cylinder attached to the end is inserted from the outlet of the heat treatment cylinder, the yarn is sucked, and then the pipe is pulled out from the heat treatment cylinder for threading. Although the method is used, there are problems that a considerable work space is required for inserting and withdrawing the pipe, and it is difficult to deliver the yarn to the winding section after threading. Also, this method is effective only when the heat treatment temperature is relatively low, and when the inner wall temperature of the heat treatment cylinder is high, the yarn is fused to the inner wall of the pipe only by the contact of the pipe with the inner wall of the pipe. There are drawbacks such as being unable to pass through, and the workability is extremely poor.

[0008]

[Problems to be solved by the device]

 The present invention proposes a heat treatment cylinder which solves the above-mentioned conventional drawbacks and can reliably thread a yarn even in a high temperature state in a short time.

[0009]

[Means for Solving the Problems]

 That is, the present invention is a non-contact type heat treatment cylinder arranged below the spinneret of thermoplastic synthetic fiber, wherein the inner peripheral surface of the heat treatment cylinder is coated with tetrafluoroethylene resin. It is a heat-treated tube of synthetic fiber.

[0010]

[Action]

 According to the present invention, the abrasion resistance of the SiC layer is further improved by forming the abrasion resistant SiC layer on the chromium plating layer, and the SiC layer is formed by the PVD method (physical method). Since it is formed by the vapor deposition method, the processing temperature of the base material is low (400 to 500 ° C.), so that there is almost no distortion, and therefore the quality of the yarn produced is improved.

[0011]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a schematic vertical sectional view showing an embodiment of the present invention.

In the figure, reference numeral 1 denotes a heat treatment cylinder fixed to a lower position of a spinneret 6 through a floor F, which has a heat treatment cylinder body 2 having an inner diameter of 35 mm and a height of 1500 mm. The inner peripheral surface of the is coated with a tetrafluoroethylene resin to form a resin coating 3, and an electric heater (not shown) (other means such as a heating medium jacket may be provided) on the outer peripheral side. ing.

On the lower end surface of the cylinder body 2, there is provided a connecting slit 4 formed in the axial direction so that it can be connected to the aspirator (suction mouth) 7 with one touch. The slit 4 has a groove 5 which is deformed along the circumferential direction so as to correspond to a plurality of inversely tapered or spherically-shaped projections provided on the suction mouse 7 at predetermined intervals. It can be easily connected by pressing and rotating the protrusion of 7. As a connecting method, a magnet or the like that utilizes magnetic force can be used.

Therefore, when a suction device is closely attached to the outlet position at the lower end of the cylinder main body 2 and the spun yarn is sucked from the inlet at the upper end, the entire inner surface of the cylinder main body is coated with tetrafluoroethylene resin. Therefore, even if the yarn comes into contact with the inner surface of the cylinder body, it does not melt and it can be threaded easily and easily.

That is, as shown in FIG. 2 (a), a suction mouse 7 having an inner diameter and an outer diameter substantially the same as the lower end of the cylinder body 2 (the suction mouse 7 is connected via a suction hose 8 to a suction gun, an aspirator, or the like). By connecting (connecting to the suction device) and integrating them, the tube body 2 becomes a part of the suction tube and has the ability to suck the yarn y.

In this case, it is preferable that an elastic body such as rubber is interposed between the cylinder body 2 and the suction mouse 7 so as to be adhered to either surface so as to improve the adhesion. ..

At this time, the yarn y discharged from the spinneret 6 is sucked by the suction gun 9 at a position above the floor F according to a standard method, and as shown in FIG. When it is put into the body 2, it passes through the inside of the cylinder body and is sucked from the suction mouse 7 to the hose 8. Thereafter, as shown in FIG. 2 (c), the suction mouth 7 is removed from the barrel main body 2 and the yarn y is transferred to the yarn suction suction gun 10 to complete the threading.

Here, under the condition that the temperature of the heat treatment cylinder is relatively low, the thread is not fused to the wall surface and the threading is possible even without the above-mentioned coating layer on the inner wall. Under high temperature conditions such as above 150 ° C., especially above 200 ° C., wall fusion occurs and threading cannot be carried out stably.

When using the above heat-treated cylinder to obtain a straight-deposited yarn of polyester fiber of 75 de / 36 fil, if the cylinder temperature is 150 ° C. or less, even if it is a conventional stainless steel mirror surface, it is completely fused to the wall surface. However, when the temperature was set to 150 ° C. or higher, even if the suction speed was increased, the fusion of the wall surface was completely generated. Therefore, when a tetrafluoroethylene resin layer having a thickness of 15 μm was provided, good threading could be performed without sticking to the wall surface in the range of 150 to 250 ° C.

Although the example of one yarn has been described above, it goes without saying that the same can be applied when two or more yarns are simultaneously threaded. In addition, although the suction mouse is fixed to the yarn outlet of the heat treatment tube and sucked, it is not necessary to fix it and the threading work may be performed manually or by pressing it to the heat treatment tube yarn outlet by an automated means. It may be

[0021]

[Effect of the device]

 As described above, according to the present invention, there is an extremely remarkable effect that the threading time can be reduced and the threading can be reliably performed even in a high temperature state without fusing the thread to the wall surface.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an embodiment of the present invention.

FIG. 2 (a) is an explanatory view of the operation of the present invention. (B) It is operation | movement explanatory drawing of this invention. (C) It is operation | movement explanatory drawing of this invention.

[Explanation of symbols]

 2 Heat treatment cylinder body 3 Resin coating 7 Suction mouse

Claims (3)

[Scope of utility model registration request] 1. A non-contact type heat treatment cylinder disposed below a spinneret of a thermoplastic synthetic fiber, wherein an inner peripheral surface of the heat treatment cylinder is coated with a tetrafluoroethylene resin. Heat treated cylinder of synthetic fiber. 2. The heat treatment cylinder for synthetic fibers according to claim 1, wherein a one-touch coupling element connected to the yarn suction device is provided at a lower end portion of the heat treatment cylinder. 3. The heat-treated cylinder for synthetic fibers according to claim 2, wherein the one-touch coupling element is a magnet.