JPS6332139Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a heating device comprising a heating roller and a heat-resistant top roller, suitable for heating yarn to a high temperature.

[Prior art and its problems]

Heated rollers are widely used in the field of textile processing. In the case of one yarn, it can be used for intermediate heat treatment of the yarn in the spinning process, for heating or heat fixing during direct spinning and drawing, for raising the temperature on the supply side or for heat fixing on the take-off side in the drawing process, It is widely used for preheating in the false twisting process or for fixing false twisting.

The advantage of using a heating roller is that the heating area can be spatially smaller compared to a heating plate;
Also, since the friction between the thread and the metal surface is large, the thread can be drawn by simply winding it around a heating roller several times. Particularly in the latter case, it is widely used as a thread nip method called the Nelson method.

On the other hand, if you want to reduce the number of windings around the heating roller for some reason, the Nelson method does not have a clear nip point for the yarn, so it may cause uneven stretching or inability to stretch due to slippage between the yarn and metal, or fluctuations in the number of false twists. will arise.

As a solution to this problem, Japanese Patent Laid-Open No. 50-48209 discloses a heating roller that uses an elastic nip roller in combination. This ensures reliable knitting of the yarn and fixes the drawing point and twisting starting point.

However, as is clear from the example temperature of the known example, conventional elastic rollers that can reliably nip yarn on the metal roller surface usually
It has a heat resistance temperature of about 100°C, and even if the rubber material was modified, the practical heat resistance limit was 120 to 130°C. In other words, even if the heat-setting temperature of the yarn by the heating roller was set at a high temperature of 180°C or 200°C, the top roller could not withstand the heat and the purpose could not be achieved. Furthermore, when the material of the top roller is thermosetting phenolic resin, metal, or ceramics, thread nip failure occurs due to scratches on the metal surface or the screws caused by the misalignment of the top roller's core, making it impossible to put it into practical use. Ta.

[Purpose of this invention]

The purpose of this invention is to improve the durability of the device and to easily nip the yarn by using an elastic heat-resistant top roller when heating the yarn to a high temperature with the heating roller.

[Structure of the present invention]

The configuration of the device of the present invention is as follows.

"A yarn heat treatment device consisting of a pair of a rotating heating roller and a top roller coated with an elastic material with a heat-resistant temperature of 250°C or higher as a lining material." Figure 1 shows a view of the device of this invention viewed from the direction of the roller rotation axis. show. Reference numeral 1 denotes a heating roller, and the yarn wound around the outer periphery is heat-treated by the roller and sent out in the direction of the arrow. 2 is Totsu Prora,
The surface that comes into contact with the heating roller 1 is made of lining material 3.
covered by. The feeding yarn is completely nipped by the heating roller 1 and the top roller 2.
Reference numeral 4 denotes guides or Nelson pins for regulating the thread path on the heating roller.

The heating roller 1 may be heated by any method, such as a heating method using an internal nichrome wire, an induction heating method, or a radiation heating method for the surface from outside the heating roller.

In the present invention, the characteristics required of the lining material for the top roller are heat resistance and appropriate elasticity.

The heat resistance temperature described in this invention is the temperature at which the original strength decreases by 25% when subjected to high temperature aging for 8 hours. If a top roller made of a material with a heat resistance temperature of 250°C or lower is rotated in contact with a heated roller at a temperature of 150 to 200°C, the surface will melt and age.

As a material with a heat resistance temperature of 250°C or higher, silicon rubber or tetrafluoroethylene resin is suitable, and both have a heat resistance temperature of 270°C or higher. Silicon rubber is made of zirconyl nitrate, metal zirconate, zirconium silicate,
Additives such as fluorinated zirconate metal salts, carbon black, and organic acid metal salts may be added.

Tetrafluoroethylene resin is a polymer of CF ₂ = CF ₂ , and is typified by the resin produced and sold as “Teflon” (registered trademark) by Du-Pont Company in the United States.
Heat resistant temperature is 300℃ or higher.

[Function of the present invention]

This device uses a heat-resistant top roller to reliably nip and send out yarn that is being fed while being wound around the outer periphery of a rotating high-temperature heating roller.

[Effects of this invention]

The device of the present invention reliably nips the feeding yarn even when the heating roller is at a high temperature, and the top roller has extremely long durability. In other words, it has become possible to perform various yarn processing by nipping the yarn on heated rollers at 130 to 150°C, which was previously impossible.

First, in drawing undrawn and semi-drawn yarns, it has become possible to heat at high temperatures on both the supply side and the withdrawal side. As a result, the number of Nelson windings required in the conventional method is reduced, and heating can be performed in a short time.
A drawn yarn with physical properties different from those of conventional drawn yarns can be obtained.

In addition, by installing the device of the present invention in front of the false twisting device or just before the heater for fixing the temperature of false twisting, it is possible to heat the untwisted yarn to the false twisting temperature in a short time, and then It is possible to supply the material to the twisting area and perform the false twisting process in a stable state, and at the same time, it is possible to shorten the total heating time or the spatial heating area. Furthermore, if the above-mentioned two properties are utilized as a heating means for direct spinning drawing and direct spinning drawing false twisting, the utility value is great. That is, even in high-speed processing, the high-temperature heating region can be shortened, and the yarn can be reliably fed out to obtain high-quality drawn or processed yarn.

[Brief explanation of the drawing]

FIG. 1 is a schematic view of the device of the present invention viewed from the direction of the roller rotation axis. 1: heating roller, 2: top roller, 3: lining material for top roller, 4: guides, 5: feeding thread.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A yarn heat treatment device consisting of a pair of a rotating heating roller and a top roller coated with an elastic material with a heat-resistant temperature of 250°C or higher as a lining material. (2) The device according to claim 1, wherein the lining material is made of an elastic material whose main component is tetrafluoroethylene resin or silicone rubber.