A YARN DRAWING ROLLER Field of the Invention

The present invention relates to a yarn drawing roller which heats the yarn with infrared heaters in order to provide the desired elongation and strength features to the yarn and thus enables to perform hot and cold drawing processes in yarn production process.

Background of the Invention

Rollers are used for providing the desired elongation and strength features to yarns in textile industry. The said rollers apply hot and cold drawing processes to yarn. Rollers are heated with three different techniques. First one of these is heating with induction coil using electric, second one is heating the chamber and roller by sending the air heated with hot vapor to the chamber in which the rollers are located, and third one is heating the rollers by circulating the water heated with electric in the roller.

In first process, there is an induction coil located inside the roller. The roller shell is heated via the induction coil inside the roller shell. Investment, operation and maintenance costs are high in the systems using such rollers.

In second process, high pressure saturated vapor heats the air passing over via an exchanger, the heated air is sent to the part wherein the rollers are present via a fan. The rollers and the chamber in which they are located are heated with the said heated air. Additional facility installation is required in this system since high pressure vapor is used. Furthermore, fan using in high temperature and exchanger working with high pressure vapor should be used. These increase the operation, maintenance and investment costs.

In the third process, there are liquid channels located inside the roller. The liquid (water or oil) heated with electric heater is sent to the roller and the roller shell is heated by means of the said liquid. Investment, operation and maintenance costs are high in the systems using such rollers.

Since the infrared heating rods are standard production materials and used in many systems, investment costs of their control systems and heaters are cheaper than the systems with custom production vapor heater or induction coils.

High maintenance time and cost:

In first process, since the induction coil inside the roller is wrapped, demounting and maintenance time is long and thus maintenance cost is also high.

In second process, exchanger and fan additional to roller increases the maintenance time costs. Furthermore, in vapor heating systems, first heating time is much longer relative to the infrared heating systems.

In third process, since there is a liquid circulating inside the roller, roller sizes are big and their maintenance is troublesome and high cost. Furthermore, the liquid is heated with electricity and then the roller is heated, thermal efficiency is lower than the infrared systems.

High energy consumption:

First vapor is generated in order to heat the roller surface in the second process, then air is heated with this vapor and the roller is heated with the heated air. Total energy consumption is high since efficiency decreases in each heat transfer.

In the third process, since the liquid is heated with electricity and then the roller is heated, thermal efficiency is lower than the infrared systems.

Surface temperature distribution: With the hot air blown in second process, surface temperature control cannot be performed in desired accuracy.

Chinese Patent document no CN 102976145 known in the state of the art, discloses a yarn roller.

Summary of the Invention

The objective of the present invention is to provide a yarn drawing roller which uses infrared heater to provide the preferred elongation and strength features to the yarn.

Another objective of the present invention is to provide a yarn drawing roller which has high energy efficiency and low energy consumption since there is no impediment between the infrared heater and itself.

Detailed Description of the Invention

A yarn drawing roller developed to fulfill the objective of the present invention is illustrated in the accompanying figures wherein,

Figure 1 is the top view of the yarn drawing roller in which the infrared heater is placed.

Figure 2 is the cross-sectional view of the yarn drawing roller in which the infrared heater is placed.

Figure 3 is the cross-sectional view of the yarn drawing roller in which the infrared heater is placed to its another position.

The components shown in the figures are each given reference numbers follows: 1. Yarn drawing roller

2. Body

3. Spinner cavity

4. Inner surface

5. Middle cavity

6. Outer surface

7. Infrared heater

8. Connection A yarn drawing roller (1), which heats the yarn with infrared heaters in order to provide preferred elongation and strength features to the yarn in yarn production process and thus enables to apply hot and cold drawing processes, essentially comprises

at least one hollow body (2) which has preferably a cylindrical structure, - at least one spinner cavity (3) which is located at the center of the body (2), and enables the body (2) to rotate around its own axis via a spinner inserted therein,

at least one inner surface (4) which is on the lower part of the wall thickness present at the outermost part of the body (2),

- at least one middle cavity (5) which is located between the spinner cavity (3) and the inner surface (4),

at least one outer surface (6) which is present at the outermost part of the body (2) and which enables the yarn to be wound thereon,

at least one infrared heater (7) which can be located inside the body (2) or anywhere around it, and enables the yarn to be heated to provide preferred elongation and strength features,

at least one connection (8) which serves as bedding for the infrared heater (7), which is designed for enable to replace the infrared heater (7) with another one when it is preferred. In a preferred embodiment of the invention, there is a body (2) which preferably has cylindrical shape and the length of which can be elongated in a preferred size according to the winding of the yarn. The body (2) is hollow and its wall thickness can be changed as preferred. There is a spinner cavity (3) present at the center of the body (2). A spinner can be placed inside the spinner cavity (3), and the body (2) can be rotated around its own axis via the said spinner. The spinner placed in the spinner cavity (3) rotates the body (2) in the desired direction until the yarn gains the preferred length and strength value. Since the body (2) is hollow, it has certain wall thickness. Inner surface (4) is present on the lower part of the said wall thickness. There is a middle cavity (5) between the spinner cavity (3) and the inner surface (4). The outer surface (6) is present at the outermost part of the body (2). The yarn needs to be heated in order to have the preferred length and strength. For this reason, one or more than one infrared heaters (7) are located into the cavity (5) present in the body (2). The infrared heater (7) is placed into the middle cavity (5) such that it will not contact the inner surface (4). Besides, the infrared heater (7) in the middle cavity (5) is mounted to the connections (8) present therein. The infrared heater (7) can be mounted at a certain distance preferably to the outer surface (6) as well as it can be mounted to the middle cavity (5). The infrared heaters (7) which are mounted do not rotate with the body (2), they remain fixed at their position.

By means of the infrared heater (7) in the yarn drawing roller (1) being mounted into the body (2) or around it via the connection (8), the dysfunctional infrared heater (7) can easily be demounted and then a new infrared heater (7) can be mounted therein. Therefore, the infrared heater (7) is smaller than the fan and the exchanger present in the previous systems, and it can be mounted and removed in shorter time. This situation provides a big advantage in terms of cost.

The connection can be used as socket when it is preferred as well as it can be used as wired connection.